WO2024032405A1 - 一种通信方法及通信装置 - Google Patents

一种通信方法及通信装置 Download PDF

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Publication number
WO2024032405A1
WO2024032405A1 PCT/CN2023/110144 CN2023110144W WO2024032405A1 WO 2024032405 A1 WO2024032405 A1 WO 2024032405A1 CN 2023110144 W CN2023110144 W CN 2023110144W WO 2024032405 A1 WO2024032405 A1 WO 2024032405A1
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WIPO (PCT)
Prior art keywords
terminal device
information
message
network device
indication information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/110144
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English (en)
French (fr)
Inventor
陈晓华
谢曦
尹鹏
姚琴波
刘圆圆
陈洪强
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP23851626.4A priority Critical patent/EP4561190A4/en
Priority to JP2025507663A priority patent/JP2025526793A/ja
Publication of WO2024032405A1 publication Critical patent/WO2024032405A1/zh
Priority to US19/049,226 priority patent/US20250203702A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/10—Integrity
    • H04W12/106—Packet or message integrity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • H04W52/0235—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal where the received signal is a power saving command
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0274—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/005—Transmission of information for alerting of incoming communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/12—Inter-network notification
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/08—User notification, e.g. alerting and paging, for incoming communication, change of service or the like using multi-step notification by increasing the notification area

Definitions

  • the present application relates to the field of communication, and in particular, to a communication method and communication device.
  • the network device may divide multiple terminal devices in the same PO into multiple groups, and instruct the terminal devices of certain specified groups in the multiple groups to monitor paging messages in the PO based on the PEI mechanism.
  • PEI paging early indication
  • the terminal device needs to receive the broadcast message of the resident cell and determine whether it is allowed to use the PEI mechanism in the resident cell based on its last used cell. Reduce unnecessary power consumption.
  • the present application provides a communication method and communication device, which are used to avoid paging errors caused by incorrect updates of terminal equipment, so as to enhance the PEI function implemented by the terminal equipment based on the first information and reduce the power consumption of the terminal equipment.
  • the first aspect of the present application provides a communication method.
  • the method is executed by a terminal device, or the method is executed by some components in the terminal device (such as a processor, a chip or a chip system, etc.), or the method can also be executed by a capable Logic modules or software implementations that implement all or part of the terminal equipment functions.
  • the communication method is described by taking the example that the communication method is executed by a terminal device.
  • the terminal device when the terminal device receives the first message and the access stratum (AS) security between the terminal device and the network device is not activated, the terminal device determines not to update the first information, The first information is used to indicate the cell last used by the terminal device, and the first message is used to indicate releasing the radio resource control (RRC) connection between the terminal device and the network device; the terminal device releases the RRC connect.
  • AS access stratum
  • RRC radio resource control
  • the terminal device can maintain first information indicating the cell last used by the terminal device.
  • the terminal device receives the first message indicating to release the RRC connection between the terminal device and the network device and releases the RRC connection
  • the access layer security between the terminal device and the network device is not activated.
  • the terminal device determines not to update the first information.
  • the terminal device may determine that it cannot communicate with the network device based on the access layer security mechanism.
  • the terminal device determines not to update the first information in a manner such that the terminal device does not update the first information based on the cell that sent the first message (the cell is located in one or more cells corresponding to the network device), which can avoid Paging errors occur due to incorrect updates of the terminal equipment, so as to enhance the PEI function implemented by the terminal equipment based on the first information and reduce the power consumption of the terminal equipment.
  • the access layer security between the terminal device and the network device when the access layer security between the terminal device and the network device is not activated, it may be due to the failure of the connection between different network devices (access network device and core network device) to be successfully established. At that time, the network device cannot update the recently used cell information of the terminal device maintained by the network device. For this reason, in the above technical solution, the terminal device determines not to update the first information, which can make the maintenance of the terminal device's recently used cell information by the terminal device and the network device consistent (or aligned), thereby allowing the terminal device to The device and the network device can communicate normally using the PEI mechanism.
  • the access layer security between the terminal device and the network device when the access layer security between the terminal device and the network device is not activated, it may be caused by the network device being an abnormal network device (such as a pseudo base station). For this reason, in the above technical solution, the terminal device determines not to update the first information, which can prevent the terminal device from accidentally updating to the wrong cell, thereby enabling the terminal device and the network device to communicate normally using the PEI mechanism.
  • the network device being an abnormal network device (such as a pseudo base station).
  • the terminal device when the terminal device releases the RRC connection, it can be understood that the terminal device exits the RRC connection state.
  • the terminal device can enter other states besides the RRC connection state, such as idle state (idle state), inactive state (inactive state). )wait.
  • the message name of the first message used to instruct the release of the RRC connection between the terminal device and the network device may be the RRC release (RRCReleace) message.
  • This name is the name in the current communication system.
  • the name of the message used to indicate releasing the RRC connection between the terminal device and the network device may change with the evolution of the communication system.
  • the last used cell of the terminal device can be referred to as the cell to which the terminal device has recently accessed, the cell to which the terminal device has recently visited, the cell to which the terminal device has been released from connection, and the cell to which the terminal device has been released is sent to the terminal device.
  • the terminal device determines not to update the first information, which can be expressed as the terminal device does not update the first information, or it can also be expressed as the terminal device does not need to identify whether the first message carries an indication to update (or not update) the first information.
  • Instructing information to determine not to update the first information can also be expressed as the terminal device does not update the first information, it can also be expressed as the terminal device maintains the first information unchanged, or it can be expressed as the first information maintained by the terminal device remains unchanged. wait.
  • the first message includes first indication information, and the first indication information is used to indicate not to update the first information; the method further includes: connecting the terminal device and the network When the access layer security between devices is not activated, the terminal device ignores the first indication information.
  • the terminal device when the access layer security between the terminal device and the network device is not activated, the terminal device can determine that it cannot communicate with the network device based on the access layer security mechanism. To this end, The terminal device may ignore the first indication information carried in the first message and determine not to update the first information. In other words, the terminal device may determine not to update the first information without identifying whether the first message carries indication information indicating updating (or not updating) the first information, so as to avoid paging errors caused by mis-updates by the terminal device. Appear.
  • the name of the first indication information may be noLastCellUpdate cell/field/domain/parameter. This name is the name in the current communication system. In the future communication system, the first The name of the indication information may change as the communication system evolves.
  • the first message includes second indication information
  • the second indication information is used to indicate a waiting time (wait time) for accessing the network
  • the method further includes: the terminal device Ignore at least one piece of information in the first message except the second indication information, where the at least one piece of information includes first indication information, and the first indication information is used to indicate not to update the first information.
  • the first message received by the terminal device may include second indication information indicating the waiting time for accessing the network, so that the terminal device can subsequently re-establish the connection with the network device based on the second indication information. connect.
  • the terminal device may determine that it cannot communicate with the network device based on the access layer security mechanism. To this end, the terminal device At least one piece of information in the first message except the second indication information may be ignored.
  • the terminal device ignoring at least one piece of information in the first message except the second indication information may include the terminal device ignoring other information in the first message except the second indication information.
  • the second indication information can also be expressed in other ways, including: the second indication information is used to indicate the timing duration of timer T302 (where T302 indicates the waiting time for the terminal device to re-establish or restore the RRC connection); The indication information is used to indicate the waiting time for the terminal device's access attempt (access attempt), and the second indication information is used to indicate the waiting time for controlling the terminal device to establish an RRC connection, etc.
  • the name of the second indication information may be a waiting time (waitTime) cell/field/domain/parameter. This name is the name in the current communication system. In the future communication system, the name of the second indication information May change as communication systems evolve.
  • the first information includes cell information last used by the terminal device.
  • the first information may include the identity of the cell last used by the terminal device.
  • the identity may be a cell global identifier (CGI), a physical cell identifier (PCI), etc.
  • the terminal device determines that the access layer security between the terminal device and the network device is not activated, including: the terminal device determines that no reception is received to the security mode command message; after the terminal device receives the security mode command message, the terminal device determines that the process of deriving the key based on the security mode command message has failed; or, after the terminal device receives the security mode command message, the terminal device It is determined that the integrity protection check corresponding to the security mode command message has failed.
  • the terminal device can determine the access layer security between the terminal device and the network device through the above multiple methods. All are not activated to improve the flexibility of solution implementation.
  • the method further includes: the terminal device sending first capability information, the first capability information indicating that the terminal device supports PEI.
  • the terminal device can send first capability information indicating that the terminal device supports PEI to the network device, so that the network device determines that the terminal device supports PEI based on the first capability information and communicates with the terminal device based on the PEI mechanism. .
  • the method further includes: the terminal device receiving third indication information, the third indication information indicating that the network device supports PEI.
  • the network device can send third indication information indicating that the network device supports PEI to the terminal device, so that the terminal device determines that the network device supports PEI based on the third indication information and communicates with the network device based on the PEI mechanism. .
  • the terminal device and the network device can also learn the capability information of the opposite end through other implementations.
  • the other devices may be core network devices, sidelink devices, servers, etc.
  • Another example is the implementation of protocol/standard preconfiguration.
  • the second aspect of the present application provides a communication method.
  • the method is executed by a network device, or the method is executed by some components in the network device (such as a processor, a chip or a chip system, etc.), or the method can also be executed by a capable Logic modules or software implementations that implement all or part of the network device functions.
  • the communication method is described by taking the example that the communication method is executed by a network device.
  • the network device when the network device has sent the first message and the access layer security between the terminal device and the network device is not activated, the network device determines not to update the second information, and the second information is used to indicate For one or more cells that the terminal device has visited, the first message is used to instruct to release the radio resource control RRC connection between the terminal device and the network device; the network device releases the RRC connection.
  • the network device may maintain second information indicating one or more cells that the terminal device has visited.
  • the network device sends the first message instructing to release the RRC connection between the terminal device and the network device and releases the RRC connection
  • the access layer security between the terminal device and the network device is not activated.
  • the network device determines not to update the second information.
  • the network device may determine that it cannot communicate with the terminal device based on the access layer security mechanism.
  • the network device determines not to update the second information in a manner such that the network device does not update the second information based on the cell that sent the first message (the cell is located in one or more cells corresponding to the network device), which can avoid Paging errors occur due to incorrect updates of network equipment, so as to enhance the PEI function implemented by the network equipment based on the second information and reduce the power consumption of the network equipment.
  • the access layer security between the terminal device and the network device when the access layer security between the terminal device and the network device is not activated, it may be due to the failure of the connection between different network devices (access network device and core network device) to be successfully established. At that time, the network device cannot update the recently used cell information of the terminal device maintained by the network device. To this end, in the above technical solution, the network device determines not to update the second information, which can make the maintenance of the terminal device's recently used cell information by the terminal device and the network device consistent (or aligned), thereby allowing the terminal device to The device and the network device can communicate normally using the PEI mechanism.
  • the access layer security between the terminal device and the network device when the access layer security between the terminal device and the network device is not activated, it may be caused by the network device being an abnormal network device (such as a pseudo base station). For this reason, in the above technical solution, the network device determines not to update the second information, which can prevent the network device from mistakenly updating to the wrong cell, thereby enabling the terminal device and the network device to communicate normally using the PEI mechanism.
  • the network device determines not to update the second information, which can prevent the network device from mistakenly updating to the wrong cell, thereby enabling the terminal device and the network device to communicate normally using the PEI mechanism.
  • the network device determines not to update the second information, which can be expressed as the network device does not update the second information, or it can also be expressed as the network device does not need to identify whether the first message carries an indication to update (or not update) the first information.
  • Instructing information to determine not to update the second information can also be expressed as the network device does not update the second information, it can also be expressed as the network device maintains the second information unchanged, or it can be expressed as the network device maintains the second information unchanged. wait.
  • the second information is used to indicate one or more cells that the terminal device has visited, and the second information can also be used to indicate other information, such as one or more cells that the terminal device has not visited. , or other information, which is not limited here.
  • the first message includes first indication information, the first indication information is used to indicate not to update the first information, and the first information is used to indicate the last used by the terminal device. cell; the method also includes: in the case where the access layer security between the terminal device and the network device is not activated, the network device determines that the terminal device ignores the first indication information.
  • the network device when the access layer security between the terminal device and the network device is not activated, the network device can determine that it cannot communicate with the terminal device based on the access layer security mechanism. To this end, The network device determines that the terminal device ignores the first indication information, so that the network device and the terminal device can align their understanding of the first information, in order to reduce the possibility of communication errors.
  • the first message includes second indication information
  • the second indication information is used to indicate the waiting time for accessing the network
  • the method further includes: between the terminal device and the network When the access layer security between devices is not activated, the network device determines that the terminal device ignores at least one piece of information in the first message except the second indication information, and the at least one piece of information includes the first indication information,
  • the first indication information is used to indicate not to update the first information, and the first information is used to indicate the cell last used by the terminal device.
  • the first message sent by the network device may include second indication information indicating the waiting time for accessing the network, so that the terminal device can subsequently re-establish the connection with the network device based on the second indication information. connect.
  • the network device may determine that it cannot communicate with the terminal device based on the access layer security mechanism. To this end, the network device It may be determined that the terminal device ignores at least one piece of information in the first message except the second indication information, so that the network device and the terminal device can align their understanding of the first message, in order to reduce the possibility of communication errors.
  • the second indication information can also be expressed in other ways, including: the second indication information is used to indicate the timing duration of timer T302 (where T302 indicates the waiting time for the terminal device to re-establish or restore the RRC connection); The indication information is used to indicate the waiting time for the terminal device's access attempt (access attempt), and the second indication information is used to indicate the waiting time for controlling the terminal device to establish an RRC connection, etc.
  • the method further includes: when the access layer security between the terminal device and the network device is not activated, the network device determines that the terminal device does not update the first Information, the first information is used to indicate the cell last used by the terminal device.
  • the network device when the access layer security between the terminal device and the network device is not activated, the network device can determine that it cannot communicate with the terminal device based on the access layer security mechanism. To this end, The network device determines that the terminal device does not update the first information, so that the network device and the terminal device can align their understanding of the first information, in order to reduce the possibility of communication errors.
  • the first information includes cell information last used by the terminal device.
  • the first information may include the identity of the cell last used by the terminal device.
  • the identity may be CGI, PCI, etc.
  • the second information includes identifiers of one or more cells visited by the terminal device.
  • the identifiers of one or more cells visited by the terminal device may be CGI, PCI, etc.
  • the network device sends the second information to the core network device.
  • the network device may also send second information indicating one or more cells that the terminal device has visited to the core network device, so that the core network device and the network device can align the two to the third cell. 2. Understanding of information in order to reduce the possibility of communication errors.
  • the method further includes: the network device receiving first capability information, the first capability information indicating that the terminal device supports PEI.
  • the terminal device can send first capability information indicating that the terminal device supports PEI to the network device, so that the network device determines that the terminal device supports PEI based on the first capability information and communicates with the terminal device based on the PEI mechanism. .
  • the method further includes: the network device sending third indication information, the third indication information indicating that the network device supports PEI.
  • the network device can send third indication information indicating that the network device supports PEI to the terminal device, so that the terminal device determines that the network device supports PEI based on the third indication information and communicates with the network device based on the PEI mechanism. .
  • the terminal device and the network device can also learn the capability information of the opposite end through other implementations.
  • the other devices may be core network devices, sidelink devices, servers, etc.
  • Another example is the implementation of protocol/standard preconfiguration.
  • the third aspect of the present application provides a communication method.
  • the method is executed by a terminal device, or the method is executed by some components in the terminal device (such as a processor, a chip or a chip system, etc.), or the method can also be implemented by Logic module or software implementation of all or part of the terminal equipment functions.
  • the communication method is described by taking the example that the communication method is executed by a terminal device. In this method, when the terminal device receives the first message and the access layer security between the terminal device and the network device is not activated, the terminal device determines not to ignore the first indication information in the first message.
  • the terminal device ignores at least one piece of information in the first message except the first indication information and the second indication information; wherein the first message is used to indicate the release of wireless resources between the terminal device and the network device.
  • the first indication information is used to indicate not to update the first information
  • the first information is used to indicate the cell last used by the terminal equipment
  • the second indication information is used to indicate the waiting time for accessing the network; the terminal The device releases the RRC connection.
  • the terminal device can maintain first information indicating the cell last used by the terminal device.
  • the access layer security between the terminal device and the network device is not activated.
  • the terminal device determines not to ignore the first indication information in the first message, or the terminal device ignores at least one piece of information in the first message except the first indication information and the second indication information.
  • the terminal device may determine that it cannot communicate with the network device based on the access layer security mechanism.
  • the terminal device determines a way not to ignore the first indication information in the first message (or, the terminal device ignores at least one piece of information in the first message except the first indication information and the second indication information), So that the terminal device will not update the first information based on the cell that sent the first message (the cell is located in one or more cells corresponding to the network device), which can avoid the occurrence of paging errors due to incorrect updates by the terminal device.
  • the terminal device determines a way not to ignore the first indication information in the first message (or, the terminal device ignores at least one piece of information in the first message except the first indication information and the second indication information), So that the terminal device will not update the first information based on the cell that sent the first message (the cell is located in one or more cells corresponding to the network device), which can avoid the occurrence of paging errors due to incorrect updates by the terminal device.
  • the terminal device determines a way not to ignore the first indication information in the first message (or, the terminal device ignores at least one piece of information in the first message except
  • the terminal device determines a way not to ignore the first indication information in the first message (or the terminal device ignores at least one piece of information in the first message except the first indication information and the second indication information), and further The understanding of the first indication information between the terminal device and the network device can be aligned, so as to reduce the possibility of communication errors.
  • the terminal device ignoring at least one piece of information in the first message other than the first indication information and the second indication information may include: the terminal device ignoring the first message except the first indication information and the second indication.
  • Information other than information may include: the terminal device ignoring the first message except the first indication information and the second indication.
  • the method further includes: the terminal device determining not to update the first information according to the first indication information.
  • the process of the terminal device determining not to ignore the first indication information may include the terminal device determining not to update the first information based on the first indication information, so that the terminal device is based on the first indication information sent by the network device. Determining not to update the first information enables the terminal device and the network device to align their understanding of the first indication information, in order to reduce the possibility of communication errors.
  • the first information includes cell information last used by the terminal device.
  • the first information may include the identity of the cell last used by the terminal device.
  • the identity may be CGI, PCI, etc.
  • the terminal device determines that the access layer security between the terminal device and the network device is not activated, including: the terminal device determines that no reception to the security mode command message; after the terminal device receives the security mode command message, the terminal device determines that the process of deriving the key based on the security mode command message has failed; or, after the terminal device receives the security mode command message, the terminal device It is determined that the integrity protection check corresponding to the security mode command message has failed.
  • the terminal device can determine that the access layer security between the terminal device and the network device is not activated through the above multiple methods, so as to improve the flexibility of solution implementation.
  • the method further includes: the terminal device sending first capability information, the first capability information indicating that the terminal device supports paging advance indication PEI.
  • the terminal device can send first capability information indicating that the terminal device supports PEI to the network device, so that the network device determines that the terminal device supports PEI based on the first capability information and communicates with the terminal device based on the PEI mechanism. .
  • the method further includes: the terminal device receiving third indication information, the third indication information indicating that the network device supports PEI.
  • the network device can send third indication information indicating that the network device supports PEI to the terminal device, so that the terminal device determines that the network device supports PEI based on the third indication information and communicates with the network device based on the PEI mechanism. .
  • the terminal device and the network device can also learn the capability information of the opposite end through other implementations.
  • the other devices may be core network devices, sidelink devices, servers, etc.
  • Another example is the implementation of protocol/standard preconfiguration.
  • the fourth aspect of the present application provides a communication method.
  • the method is executed by a network device, or the method is executed by some components in the network device (such as a processor, a chip or a chip system, etc.), or the method can also be executed by a capable Logic modules or software implementations that implement all or part of the network device functions.
  • the communication method is described by taking the example that the communication method is executed by a network device.
  • the network device determines not to ignore the first indication information in the first message, Alternatively, the network device ignores at least one piece of information in the first message except the first indication information and the second indication information; wherein the first message is used to indicate releasing the radio resource control between the terminal device and the network device.
  • RRC connection the first indication information is used to indicate not to update the first information, the first information is used to indicate the cell last used by the terminal device, and the second indication information is used to indicate the waiting time for accessing the network; the network device Release the RRC connection.
  • the access layer security between the terminal device and the network device is not secure.
  • the network device determines not to ignore the first indication information in the first message, or the network device ignores at least one piece of information in the first message except the first indication information and the second indication information.
  • the network device may determine that it cannot communicate with the terminal device based on the access layer security mechanism.
  • the network device determines a way not to ignore the first indication information in the first message (or, the network device ignores at least one piece of information in the first message except the first indication information and the second indication information), Making it clear to the network device that the terminal device will not update the first information based on the cell that sent the first message (the cell is located in one or more cells corresponding to the network device) can avoid paging errors caused by mis-updates by the terminal device. situation occurs, so as to enhance the PEI function implemented by the terminal device based on the first information and reduce the power consumption of the terminal device.
  • the network device determines a way not to ignore the first indication information in the first message (or the network device ignores at least one piece of information in the first message except the first indication information and the second indication information), and further The understanding of the first indication information between the terminal device and the network device can be aligned, so as to reduce the possibility of communication errors.
  • the network device ignoring at least one piece of information in the first message except the first indication information and the second indication information may include: the network device ignoring the first message except the first indication information and the second indication.
  • Information other than information may include: the network device ignoring the first message except the first indication information and the second indication.
  • the method further includes: the network device determines not to update second information based on the first indication information, where the second information is used for one or more sites that the terminal device has accessed. community.
  • the network device may determine not to update the second information for one or more cells visited by the terminal device according to the first indication information, so as to facilitate the alignment between the terminal device and the network device.
  • the first directs the understanding of the message in order to reduce the possibility of communication errors.
  • the second information includes identification of one or more cells visited by the terminal device.
  • the identifiers of one or more cells visited by the terminal device may be CGI, PCI, etc.
  • the first information includes cell information last used by the terminal device.
  • the first information may include the identity of the cell last used by the terminal device.
  • the identity may be CGI, PCI, etc.
  • the method further includes: when the access layer security between the terminal device and the network device is not activated, the network device determines that the terminal device does not ignore the first The first indication information in a message, or the network device determines that the terminal device ignores at least one piece of information in the first message except the first indication information and the second indication information.
  • the network device when the access layer security between the terminal device and the network device is not activated, the network device can determine that it cannot communicate with the terminal device based on the access layer security mechanism. To this end, The network device determines that the terminal device does not ignore the first indication information in the first message (or, the network device determines that the terminal device ignores at least one of the first indication information except the first indication information and the second indication information in the first message). information), so that the network device and the terminal device can align their understanding of the first information, in order to reduce the possibility of communication errors.
  • the method further includes: the network device sending second information to the core network device.
  • the network device may also send second information indicating one or more cells that the terminal device has visited to the core network device, so that the core network device and the network device can align the two to the third cell. 2. Understanding of information in order to reduce the possibility of communication errors.
  • the method further includes: the network device receiving first capability information, the first capability information indicating that the terminal device supports PEI.
  • the terminal device can send first capability information indicating that the terminal device supports PEI to the network device, so that the network device determines that the terminal device supports PEI based on the first capability information and communicates with the terminal device based on the PEI mechanism. .
  • the method further includes: the network device sending third indication information, the third indication information indicating that the network device supports PEI.
  • the network device can send third indication information indicating that the network device supports PEI to the terminal device, so that the terminal device determines that the network device supports PEI based on the third indication information and communicates with the network device based on the PEI mechanism. .
  • the terminal device and the network device can also learn the capability information of the opposite end through other implementations.
  • the other devices may be core network devices, sidelink devices, servers, etc.
  • Another example is the implementation of protocol/standard preconfiguration.
  • the fifth aspect of the present application provides a communication method.
  • the method is executed by a terminal device, or the method is executed by some components in the terminal device (such as a processor, a chip or a chip system, etc.), or the method can also be executed by a capable device.
  • Logic modules or software implementations that implement all or part of the terminal equipment functions.
  • the communication method is described by taking the example that the communication method is executed by a terminal device.
  • the terminal device when the terminal device receives the first message and the access layer security between the terminal device and the network device is not activated, the terminal device processes the first information according to the first message, and the first The information is used to indicate the cell information last used by the terminal device, and the first message is used to indicate releasing the radio resource control RRC connection between the terminal device and the network device; the terminal device releases the RRC connection.
  • the terminal device can maintain first information indicating the cell last used by the terminal device.
  • the terminal device receives a first message indicating to release the RRC connection between the terminal device and the network device and releases the RRC connection
  • the terminal device processes the first information according to the first message.
  • the terminal device may determine that it cannot communicate with the network device based on the access layer security mechanism. Therefore, the terminal device processes the first information according to the first message, so that the terminal device and the network device align their understanding of the first message, in order to reduce the possibility of communication errors.
  • the terminal device processing the first information according to the first message includes: when the first message includes the first indication information, the terminal device determines not to update the first information. information, the first indication information is used to indicate not to update the first information.
  • the terminal device determines not to update the first information, so that the terminal device performs the corresponding operation based on the instruction of the network device. operations to reduce the possibility of communication errors.
  • the terminal device processing the first information based on the first message includes: when the first message does not include the first indication information, the terminal device processes the first information based on the first message.
  • the corresponding cell updates the first information, and the first indication information is used to indicate not to update the first information.
  • the terminal device updates the first information based on the cell corresponding to the first message, so that the terminal device performs the corresponding operation based on the instructions of the network device. , in order to reduce the possibility of communication errors.
  • the process of the terminal device updating the first information based on the cell corresponding to the first message includes: the terminal device updating the first information based on the cell identity of the cell that sent the first message, or the terminal device updating the first information based on the cell identity of the cell that sent the first message.
  • the cell identity carried in the first message updates the first information, which is not limited here.
  • the first information includes cell information last used by the terminal device.
  • the first information may include the identity of the cell last used by the terminal device.
  • the identity may be CGI, PCI, etc.
  • the terminal device determines that the access layer security between the terminal device and the network device is not activated, including: the terminal device determines that no reception is received to the security mode command message; after the terminal device receives the security mode command message, the terminal device determines that the process of deriving the key based on the security mode command message has failed; or, after the terminal device receives the security mode command message, the terminal device It is determined that the integrity protection check corresponding to the security mode command message has failed.
  • the terminal device can determine that the access layer security between the terminal device and the network device is not activated through the above multiple methods, so as to improve the flexibility of solution implementation.
  • the method further includes: the terminal device sending first capability information, and the first capability The information indicates that the terminal device supports PEI.
  • the terminal device can send first capability information indicating that the terminal device supports PEI to the network device, so that the network device determines that the terminal device supports PEI based on the first capability information and communicates with the terminal device based on the PEI mechanism. .
  • the method further includes: the terminal device receiving third indication information, the third indication information indicating that the network device supports PEI.
  • the network device can send third indication information indicating that the network device supports PEI to the terminal device, so that the terminal device determines that the network device supports PEI based on the third indication information and communicates with the network device based on the PEI mechanism. .
  • the terminal device and the network device can also learn the capability information of the opposite end through other implementations.
  • the other devices may be core network devices, sidelink devices, servers, etc.
  • Another example is the implementation of protocol/standard preconfiguration.
  • the sixth aspect of the present application provides a communication method.
  • the method is executed by a network device, or the method is executed by some components in the network device (such as a processor, a chip or a chip system, etc.), or the method can also be executed by a capable Logic modules or software implementations that implement all or part of the network device functions.
  • the communication method is described by taking the example that the communication method is executed by a network device.
  • the network device when the network device has sent the first message and the access layer security between the terminal device and the network device is not activated, the network device processes the second information according to the first message, and the second information
  • the first message is used to indicate one or more cells that the terminal device has visited.
  • the first message is used to indicate releasing the radio resource control RRC connection between the terminal device and the network device; the network device releases the RRC connection.
  • the network device may maintain second information indicating one or more cells that the terminal device has visited.
  • the network device sends a first message instructing to release the RRC connection between the terminal device and the network device and releases the RRC connection
  • the network device processes the second information according to the first message.
  • the network device may determine that it cannot communicate with the network device based on the access layer security mechanism. Therefore, the network device processes the first information according to the first message, so that the terminal device and the network device align their understanding of the first message, in order to reduce the possibility of communication errors.
  • the network device processing the second information according to the first message includes: when the first message includes the first indication information, the network device determines not to update the second information. information, the first indication information is used to indicate not to update the first information, and the first information is used to indicate the cell information last used by the terminal device.
  • the network device determines not to update the second information, so that the subsequent terminal device performs the corresponding operation based on the instruction of the network device. operations to reduce the possibility of communication errors.
  • the terminal device processing the first information based on the first message includes: when the first message does not include the first indication information, the terminal device processes the first information based on the first message.
  • the corresponding cell updates the second information, the first indication information is used to indicate not to update the first information, and the first information is used to indicate the cell information last used by the terminal device.
  • the network device updates the second information based on the cell corresponding to the first message, so that subsequent terminal devices perform corresponding operations based on the instructions of the network device. , in order to reduce the possibility of communication errors.
  • the process of the terminal device updating the first information based on the cell corresponding to the first message includes: the terminal device updating the first information based on the cell identity of the cell that sent the first message, or the terminal device updating the first information based on the cell identity of the cell that sent the first message.
  • the cell identity carried in the first message updates the first information, which is not limited here.
  • the terminal device updates the first information based on the cell identity of the cell that sends the first message.
  • the terminal device updates the last used cell information indicated by the first information to send the first message.
  • the cell ID of the cell is not limited here.
  • the first information includes cell information last used by the terminal device.
  • the first information may include the identity of the cell last used by the terminal device.
  • the identity may be CGI, PCI, etc.
  • the second information includes identification of one or more cells visited by the terminal device.
  • the identifiers of one or more cells visited by the terminal device may be CGI, PCI, etc.
  • the method further includes: the network device sending second information to the core network device.
  • the network device may also send second information indicating one or more cells that the terminal device has visited to the core network device, so that the core network device and the network device can align the two to the third cell. 2. Understanding of information in order to reduce the possibility of communication errors.
  • the method further includes: the network device determining whether the terminal device updates the first information based on the first message.
  • the network device can also determine whether the terminal device updates the first information according to the first message, so that the network device can clarify the behavior of the terminal device in order to avoid communication errors.
  • the method further includes: the network device receiving first capability information, the first capability information indicating that the terminal device supports PEI.
  • the terminal device can send first capability information indicating that the terminal device supports PEI to the network device, so that the network device determines that the terminal device supports PEI based on the first capability information and communicates with the terminal device based on the PEI mechanism. .
  • the method further includes: the network device sending third indication information, the third indication information indicating that the network device supports PEI.
  • the network device can send third indication information indicating that the network device supports PEI to the terminal device, so that the terminal device determines that the network device supports PEI based on the third indication information and communicates with the network device based on the PEI mechanism. .
  • the terminal device and the network device can also learn the capability information of the opposite end through other implementations.
  • the other devices may be core network devices, sidelink devices, servers, etc.
  • Another example is the implementation of protocol/standard preconfiguration.
  • a seventh aspect of the present application provides a communication device that can implement the method in the above-mentioned first aspect or any possible implementation manner of the first aspect.
  • the device includes corresponding units or modules for performing the above method.
  • the units or modules included in the device can be implemented by software and/or hardware.
  • the device can be a terminal device, or the device can be a component in the terminal device (such as a processor, a chip or a chip system, etc.), or the device can also be a logic module that can realize all or part of the functions of the terminal device or software.
  • the communication device is described as an example of a terminal device.
  • the device includes a processing unit and a transceiver unit; when the transceiver unit receives the first message and the access layer security between the terminal device and the network device is not activated, the processing unit determines not to update the first information , the first information is used to indicate the cell last used by the terminal device, and the first message is used to indicate releasing the radio resource control RRC connection between the terminal device and the network device; the processing unit releases the RRC connection.
  • the first message includes first indication information, the first indication information is used to indicate not to update the first information; the interface between the terminal device and the network device When entry security is not activated, the processing unit is also configured to ignore the first indication information.
  • the first message includes second indication information, the second indication information is used to indicate the waiting time for accessing the network; the processing unit is also configured to ignore the first message. At least one piece of information other than the second indication information, the at least one piece of information includes first indication information, and the first indication information is used to indicate not to update the first information.
  • the first information includes cell information last used by the terminal device.
  • the processing unit determines that the access layer security between the terminal device and the network device is not activated, including: the processing unit determines that no reception is received to the security mode command message; after the transceiver unit receives the security mode command message, the processing unit determines that the process of deriving the key based on the security mode command message fails; or, after the transceiver unit receives the security mode command message, the processing unit The processing unit determines that the integrity protection check corresponding to the security mode command message fails.
  • the transceiver unit is further configured to send first capability information, where the first capability information indicates that the terminal device supports paging advance indication PEI.
  • the transceiver unit is further configured to receive third indication information, where the third indication information indicates that the network device supports PEI.
  • the component modules of the communication device can also be used to perform the steps performed in each possible implementation manner of the first aspect, and achieve corresponding technical effects.
  • the first aspect here No longer.
  • An eighth aspect of the present application provides a communication device that can implement the method in the above second aspect or any possible implementation manner of the second aspect.
  • the device includes corresponding units or modules for performing the above method.
  • the units or modules included in the device can be implemented by software and/or hardware.
  • the device can be a network device, or the device can be a component in the network device (such as a processor, a chip or a chip system, etc.), or the device can also be a logic module that can realize all or part of the functions of the network device or software.
  • the communication device is a network device as an example for description.
  • the device includes a processing unit and a transceiver unit; when the transceiver unit has sent the first message and the access layer security between the terminal device and the network device is not activated, the processing unit determines not to update the second information, The second information is used to indicate one or more cells that the terminal device has visited, and the first message is used to indicate releasing the radio resource control RRC connection between the terminal device and the network device; the processing unit releases the RRC connection.
  • the first message includes first indication information, the first indication information is used to indicate not to update the first information, and the first information is used to indicate the last used by the terminal device.
  • the processing unit determines that the terminal device ignores the first indication information.
  • the first message includes second indication information, the second indication information is used to indicate the waiting time for accessing the network; the interface between the terminal device and the network device When inbound security is not activated, the processing unit determines that the terminal device ignores at least one piece of information in the first message except the second indication information, and the at least one piece of information includes the first indication information, and the first indication information It is used to indicate not to update the first information, and the first information is used to indicate the cell last used by the terminal device.
  • the processing unit determines that the terminal device does not update the first information, and the first The information is used to indicate the cell last used by the terminal device.
  • the first information includes cell information last used by the terminal device.
  • the second information includes identifiers of one or more cells visited by the terminal device.
  • the transceiver unit is also configured to send the second information to the core network device.
  • the transceiver unit is further configured to send third indication information, where the third indication information indicates that the network device supports PEI.
  • the component modules of the communication device can also be used to perform the steps performed in each possible implementation manner of the second aspect, and achieve corresponding technical effects.
  • the second aspect here No longer.
  • a ninth aspect of the present application provides a communication device that can implement the method in the above third aspect or any possible implementation manner of the third aspect.
  • the device includes corresponding units or modules for performing the above method.
  • the units or modules included in the device can be implemented by software and/or hardware.
  • the device can be a terminal device, or the device can be a component in the terminal device (such as a processor, a chip or a chip system, etc.), or the device can also be a logic module that can realize all or part of the functions of the terminal device or software.
  • the communication device is described as an example of a terminal device.
  • the device includes a processing unit and a transceiver unit; when the transceiver unit receives the first message and the access layer security between the terminal device and the network device is not activated, the processing unit determines not to ignore the first message.
  • the first indication information in the message, or the processing unit ignores at least one piece of information in the first message except the first indication information and the second indication information; wherein the first message is used to indicate releasing the terminal device and Radio Resource Control RRC connection between network devices, the first indication information is used to indicate not to update the first information, the first information is used to indicate the cell last used by the terminal device, and the second indication information is used to indicate access The waiting time of the network; the processing unit releases the RRC connection.
  • the processing unit is further configured to determine not to update the first information according to the first indication information.
  • the first information includes cell information last used by the terminal device.
  • the processing unit determines that the access layer security between the terminal device and the network device is not activated, including: the processing unit determines that no reception to the security mode command message; after the transceiver unit receives the security mode command message, the processing unit determines that the process of deriving the key based on the security mode command message has failed; or, after the receiving unit receives the security mode command message, After the sending unit receives the security mode command message, the processing unit determines that the integrity protection check corresponding to the security mode command message fails.
  • the transceiver unit is further configured to send first capability information, where the first capability information indicates that the terminal device supports paging advance indication PEI.
  • the transceiver unit is further configured to receive third indication information, where the third indication information indicates that the network device supports PEI.
  • the component modules of the communication device can also be used to perform the steps performed in each possible implementation manner of the third aspect, and achieve corresponding technical effects.
  • the third aspect here No longer.
  • a tenth aspect of the present application provides a communication device that can implement the method in the above-mentioned fourth aspect or any possible implementation manner of the fourth aspect.
  • the device includes corresponding units or modules for performing the above method.
  • the units or modules included in the device can be implemented by software and/or hardware.
  • the device can be a network device, or the device can be a component in the network device (such as a processor, a chip or a chip system, etc.), or the device can also be a logic module that can realize all or part of the functions of the network device or software.
  • the communication device is a network device as an example for description.
  • the device includes a processing unit and a transceiver unit; when the transceiver unit has sent the first message and the access layer security between the terminal device and the network device is not activated, the processing unit determines not to ignore the first message the first indication information in the first message, or the processing unit ignores at least one piece of information in the first message except the first indication information and the second indication information; wherein the first message is used to indicate releasing the terminal device and the network Radio Resource Control RRC connection between devices, the first indication information is used to indicate not to update the first information, the first information is used to indicate the cell last used by the terminal device, and the second indication information is used to indicate access to the network waiting time; the processing unit releases the RRC connection.
  • the processing unit releases the RRC connection.
  • the processing unit is further configured to determine not to update second information according to the first indication information, where the second information is used for one or more cells visited by the terminal device.
  • the second information includes identification of one or more cells visited by the terminal device.
  • the first information includes cell information last used by the terminal device.
  • the processing unit determines that the terminal device does not ignore the first message in the first message.
  • An indication information or the processing unit determines that the terminal device ignores at least one piece of information in the first message except the first indication information and the second indication information.
  • the transceiver unit is also used to send the second information to the core network device.
  • the transceiver unit is further configured to receive first capability information, where the first capability information indicates that the terminal device supports paging advance indication PEI.
  • the transceiver unit is further configured to send third indication information, where the third indication information indicates that the network device supports PEI.
  • the component modules of the communication device can also be used to perform the steps performed in each possible implementation manner of the third aspect, and achieve corresponding technical effects.
  • the third aspect here No longer.
  • An eleventh aspect of the present application provides a communication device that can implement the method in the above-mentioned fifth aspect or any possible implementation manner of the fifth aspect.
  • the device includes corresponding units or modules for performing the above method.
  • the units or modules included in the device can be implemented by software and/or hardware.
  • the device can be a terminal device, or the device can be a component in the terminal device (such as a processor, a chip or a chip system, etc.), or the device can also be a logic module that can realize all or part of the functions of the terminal device or software.
  • the communication device is described as an example of a terminal device.
  • the device includes a processing unit and a transceiver unit; when the transceiver unit receives the first message and the access layer security between the terminal device and the network device is not activated, the processing unit processes the first message according to the first message.
  • First information the first information is used to indicate the cell information last used by the terminal equipment, the first message is used to indicate releasing the radio resource control RRC connection between the terminal equipment and the network equipment; the processing unit releases the RRC connection .
  • the processing unit processing the first information according to the first message includes: in the first If the message includes first indication information, the processing unit determines not to update the first information, and the first indication information is used to indicate not to update the first information.
  • the processing unit processing the first information according to the first message includes: when the first message does not include the first indication information, the processing unit processes the first information based on the first indication information.
  • the cell corresponding to the message updates the first information, and the first indication information is used to indicate not to update the first information.
  • the first information includes cell information last used by the terminal device.
  • the processing unit determines that the access layer security between the terminal device and the network device is not activated, including: the processing unit determines that the access layer security is not activated.
  • the security mode command message is received; after the transceiver unit receives the security mode command message, the processing unit determines that the process of deriving the key based on the security mode command message fails; or, after the transceiver unit receives the security mode command message, The processing unit determines that the integrity protection check corresponding to the security mode command message fails.
  • the transceiver unit is further configured to send first capability information, where the first capability information indicates that the terminal device supports paging advance indication PEI.
  • the transceiver unit is further configured to receive third indication information, where the third indication information indicates that the network device supports PEI.
  • the component modules of the communication device can also be used to perform the steps performed in each possible implementation manner of the fourth aspect, and achieve corresponding technical effects.
  • the fourth aspect please refer to the fourth aspect. No further details will be given.
  • a twelfth aspect of the present application provides a communication device that can implement the method in the above-mentioned sixth aspect or any possible implementation manner of the sixth aspect.
  • the device includes corresponding units or modules for performing the above method.
  • the units or modules included in the device can be implemented by software and/or hardware.
  • the device can be a network device, or the device can be a component in the network device (such as a processor, a chip or a chip system, etc.), or the device can also be a logic module that can realize all or part of the functions of the network device or software.
  • the communication device is described as an example of a network device.
  • the device includes a processing unit and a transceiver unit; when the transceiver unit has sent the first message and the access layer security between the terminal device and the network device is not activated, the processing unit processes the first message according to the first message. Two information, the second information is used to indicate one or more cells that the terminal device has visited, and the first message is used to indicate releasing the radio resource control RRC connection between the terminal device and the network device; the processing unit releases the RRC connection.
  • the processing unit processing the second information according to the first message includes: when the first message includes the first indication information, the processing unit determines not to update the second information. Second information, the first indication information is used to indicate not to update the first information, and the first information is used to indicate the cell information last used by the terminal equipment.
  • the processing unit processing the first information according to the first message includes: when the first message does not include the first indication information, the processing unit processes the first information based on the first indication information.
  • the cell corresponding to the message updates the second information, the first indication information is used to indicate not to update the first information, and the first information is used to indicate the cell information last used by the terminal device.
  • the first information includes cell information last used by the terminal device.
  • the second information includes identifiers of one or more cells visited by the terminal device.
  • the processing unit determines whether the terminal device updates the first information according to the first message.
  • the transceiver unit is further configured to receive first capability information, where the first capability information indicates that the terminal device supports paging advance indication PEI.
  • the transceiver unit is further configured to send third indication information, where the third indication information indicates that the network device supports PEI.
  • the component modules of the communication device can also be used to perform the steps performed in each possible implementation manner of the sixth aspect, and achieve corresponding technical effects.
  • the sixth aspect please refer to the sixth aspect. No further details will be given.
  • a thirteenth aspect of the embodiment of the present application provides a communication device, including at least one processor, the at least one processor and a storage device coupled to a processor; the memory is used to store programs or instructions; the at least one processor is used to execute the program or instructions, so that the device implements any possible implementation manner of any one of the foregoing first to sixth aspects. the method described.
  • the fourteenth aspect of the embodiment of the present application provides a communication device, including at least one logic circuit and an input-output interface; the logic circuit and the input-output interface are used to perform any one of the foregoing first to sixth aspects. Any possible implementation method.
  • the fifteenth aspect of the embodiment of the present application provides a computer-readable storage medium that stores one or more computer-executable instructions.
  • the processor executes the above-described first to sixth aspects. The method described in any possible implementation manner in any aspect.
  • a sixteenth aspect of the embodiment of the present application provides a computer program product (or computer program).
  • the processor executes any one of the above-mentioned first to sixth aspects. Any possible implementation method.
  • the seventeenth aspect of the embodiment of the present application provides a chip system, which includes at least one processor and is used to support a communication device to implement any possible implementation of any one of the above-mentioned first to sixth aspects.
  • the chip system may also include a memory for storing necessary program instructions and data of the communication device.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the chip system further includes an interface circuit that provides program instructions and/or data to the at least one processor.
  • the eighteenth aspect of the embodiment of the present application provides a communication system.
  • the communication system includes the terminal device in the first aspect and the network device in the second aspect, or the communication system includes the terminal device in the third aspect. and the network device in the fourth aspect, or the communication system includes the terminal device in the fifth aspect and the network device in the sixth aspect.
  • the communication system includes the communication device of the seventh aspect and the communication device of the eighth aspect, or the communication system includes the communication device of the ninth aspect and the communication device of the tenth aspect, or the communication system includes the communication device of the ninth aspect.
  • Figure 1a is a schematic diagram of the communication scenario provided by this application.
  • Figure 1b is another schematic diagram of the communication scenario provided by this application.
  • Figure 1c is another schematic diagram of the communication scenario provided by this application.
  • Figure 2a is a schematic diagram of the paging process involved in this application.
  • Figure 2b is another schematic diagram of the paging process involved in this application.
  • Figure 3a is another schematic diagram of the communication scenario provided by this application.
  • Figure 3b is another schematic diagram of the communication scenario provided by this application.
  • FIG. 4 is a schematic diagram of the communication method involved in this application.
  • FIG. 5 is another schematic diagram of the communication method involved in this application.
  • FIG. 6 is another schematic diagram of the communication method involved in this application.
  • FIG. 7 is another schematic diagram of the communication method involved in this application.
  • FIG. 8 is another schematic diagram of the communication method involved in this application.
  • FIG. 9 is a schematic diagram of the communication device provided by this application.
  • FIG. 10 is another schematic diagram of the communication device provided by this application.
  • FIG 11 is another schematic diagram of the communication device provided by this application.
  • Figure 12 is another schematic diagram of the communication device provided by this application.
  • Terminal device It can be a wireless terminal device that can receive network device scheduling and instruction information.
  • the wireless terminal device can be a device that provides voice and/or data connectivity to the user, or a handheld device with a wireless connection function, or Other processing equipment connected to the wireless modem.
  • the terminal device can communicate with one or more core networks or the Internet via a radio access network (RAN).
  • RAN radio access network
  • the terminal device can be a mobile terminal device, such as a mobile phone (also known as a "cellular" phone, mobile phone). phone), computer and data card, which may be, for example, a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges voice and/or data with the wireless access network.
  • PCS personal communication service
  • SIP Session Initiation Protocol
  • WLL wireless local loop
  • PDA personal digital assistants
  • Tablets tablets Computers
  • computers with wireless transceiver functions and other equipment.
  • Wireless terminal equipment can also be called a system, subscriber unit, subscriber station, mobile station, mobile station (MS), remote station, access point ( access point, AP), remote terminal equipment (remote terminal), access terminal equipment (access terminal), user terminal equipment (user terminal), user agent (user agent), subscriber station (subscriber station, SS), client equipment (customer premises equipment, CPE), terminal (terminal), user equipment (user equipment, UE), mobile terminal (mobile terminal, MT), etc.
  • the terminal device can also be a wearable device and a next-generation communication system, such as a terminal device in a 5G communication system or a terminal device in a future evolved public land mobile network (PLMN).
  • PLMN public land mobile network
  • Network equipment It can be equipment in a wireless network.
  • network equipment can be a radio access network (RAN) node (or equipment) that connects terminal equipment to the wireless network, and can also be called a base station.
  • RAN equipment are: new generation base station (generation Node B, gNodeB), transmission reception point (TRP), evolved Node B (evolved Node B, eNB), wireless network in 5G communication system Controller (radio network controller, RNC), node B (Node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (e.g., home evolved Node B , or home Node B, HNB), base band unit (base band unit, BBU), or wireless fidelity (wireless fidelity, Wi-Fi) access point (access point, AP), etc.
  • the network device may include a centralized unit (CU) node, a distributed unit (CU) node, a distributed unit (CU) node,
  • the network device can send configuration information (for example, carried in a scheduling message and/or an instruction message) to the terminal device, and the terminal device further performs network configuration based on the configuration information, so that the network configuration between the network device and the terminal device is aligned; or , through the network configuration preset on the network device and the network configuration preset on the terminal device, the network configuration between the network device and the terminal device is aligned.
  • alignment refers to the determination of the carrier frequency for sending and receiving interactive messages, the type of interactive messages, the meaning of the field information carried in the interactive messages, or whether there are interactive messages between the network device and the terminal device. The understanding of other configurations of interactive messages is consistent.
  • the network device may be other devices that provide wireless communication functions for terminal devices.
  • the embodiments of this application do not limit the specific technology and specific equipment form used by the network equipment. For convenience of description, the embodiments of this application are not limited.
  • Network equipment may also include core network equipment.
  • Core network equipment may include, for example, access and mobility management function (AMF), user plane function (UPF) or session management function (SMF). wait.
  • AMF access and mobility management function
  • UPF user plane function
  • SMF session management function
  • the device used to implement the function of the network device may be a network device, or may be a device that can support the network device to implement the function, such as a chip system, and the device may be installed in the network device.
  • the technical solution provided by the embodiment of the present application the technical solution provided by the embodiment of the present application is described by taking the device for realizing the functions of the network device being a network device as an example.
  • the terminal device has at least three RRC states: RRC connected state (connected state), RRC idle state (idle state) and inactive state (inactive state).
  • RRC connected state connected state
  • RRC idle state idle state
  • inactive state inactive state
  • connection state (or, it can also be referred to as connection state for short.
  • connection state and “RRC connection state” are the same concept, and the two names are interchangeable):
  • the terminal device has established an RRC connection with the network, and can Perform data transfer.
  • RRC idle state (or, it can also be referred to as idle state for short.
  • idle state and “RRC idle state” are the same concept, and the two names are interchangeable): the terminal device does not establish an RRC connection with the network, and the base station No context is stored for this end device. If the terminal device needs to enter the RRC connected state from the RRC idle state, it needs to initiate the RRC connection establishment process.
  • RRC inactive state (or, can also be referred to as inactive state for short.
  • deactivated state “deactivated state”, “deactivated state”, “inactive state”, “RRC inactive state” and “RRC deactivated state”
  • the terminal device previously entered the RRC connection state, and then the base station released the RRC connection, but the base station saved the context of the terminal device. If the terminal device needs to enter the RRC connected state from the RRC inactive state again, it needs to initiate an RRC recovery process (or called an RRC connection recovery process). Compared with the RRC establishment process, the RRC recovery process has shorter delay and less signaling overhead. However, the base station needs to save the context of the terminal device, which will occupy the storage overhead of the base station.
  • system information is a message sent by the base station, which contains information required for UE initialization and some other function/feature related information. Among them, system information is divided into minimum system information (minimum SI) and other system information (other SI, OSI). Minimum system information consists of master information block (MIB) and system information block 1 (SIB1). SIB1 is also called remaining minimum system information (remaining minimum SI, RMSI).
  • MIB master information block
  • SIB1 system information block 1
  • RMSI remaining minimum system information
  • the MIB will be broadcast periodically on the broadcast channel (BCH).
  • SIB1 is periodically broadcast on the downlink shared channel (DL-SCH), or sent to terminal equipment in the RRC connected state (RRC_CONNECTED) through dedicated signaling.
  • DL-SCH downlink shared channel
  • RRC_CONNECTED terminal equipment in the RRC connected state
  • SIB2 ⁇ SIB9 Other system information consists of other SIBs, for example, SIB2 ⁇ SIB9, etc.
  • Other SIBs are broadcast on the DL-SCH periodically or on-demand (that is, when the RRC idle state (RRC_IDLE) or RRC inactive state (RRC_INACTIVE) the terminal device requests a certain SIB, the network device broadcasts the SIB, otherwise it does not send the SIB), or sends it to the RRC connected state UE through dedicated signaling.
  • the basic process for terminal equipment in RRC idle state and RRC inactive state to obtain system information is that the terminal equipment first obtains the MIB, obtains SIB1 based on the scheduling information in the MIB, and then obtains other SIBs based on the scheduling information in SIB1.
  • SIB1 is configured with parameters such as the default paging cycle T, the number of PFs in the paging cycle (N) and the offset of the PF (PF_offset), and the number of POs corresponding to one PF (Ns).
  • Configuration and preconfiguration In this application, configuration and preconfiguration will be used at the same time.
  • Configuration means that the network device/server sends the configuration information or parameter values of some parameters to the terminal through messages or signaling, so that the terminal can determine communication parameters or transmission resources based on these values or information.
  • Preconfiguration is similar to configuration. It can be parameter information or parameter values that the network device/server has negotiated with the terminal device in advance, or it can be parameter information or parameter values adopted by the base station/network device or terminal device specified in the standard protocol, or it can be Parameter information or parameter values stored in the base station/server or terminal equipment in advance. This application does not limit this.
  • system and “network” in the embodiments of this application can be used interchangeably.
  • “At least one” means one or more, and “plurality” means two or more.
  • “And/or” describes the relationship between associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist simultaneously, and B alone exists, where A, B can be singular or plural.
  • the character “/” generally indicates that the related objects are in an “or” relationship.
  • At least one of the following” or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items).
  • At least one of A, B, and C includes A, B, C, AB, AC, BC, or ABC.
  • the ordinal numbers such as “first” and “second” mentioned in the embodiments of this application are used to distinguish multiple objects and are not used to limit the order, timing, priority or importance of multiple objects. degree.
  • FIG. 1a is a schematic diagram of the communication system in this application.
  • a network device 101 and six terminal devices are shown as an example.
  • the six terminal devices are terminal device 1, terminal device 2, terminal device 3, terminal device 4, terminal device 5, terminal device 6, etc. .
  • terminal device 1 is a smart teacup
  • terminal device 2 is a smart air conditioner
  • terminal device 3 is a smart gas pump
  • terminal device 4 is a vehicle
  • terminal device 5 is a mobile phone
  • terminal device 6 is The printer is used as an example.
  • the signal sending device (or called the transmitting end, the transmitting end device) can be a network device, and the signal receiving device (or called the receiving end, the receiving end device) can be the terminal device; or , the signal sending device may be a terminal device, and the signal receiving device may be a network device; or both the signal sending device and the signal receiving device may be network devices; or both the signal sending device and the signal receiving device may be terminal devices.
  • the communication system includes at least one network device and/or at least one terminal device.
  • Figure 1b is a 5G NR system architecture diagram.
  • the 5G core network can include network elements such as access and mobility management function (Aaccess and mobility management function, AMF) and user plane function (UPF).
  • the 5G radio access network can include network elements such as the 5G access network (denoted as gNB) and the 4G access network (denoted as ng-eNB) connected to the 5GC.
  • the serving base station gNB of the terminal device is responsible for providing the user plane and control plane protocol functions of 5G NR for the terminal device; the serving base station ng-eNB of the terminal device is responsible for providing 4G E- UTRA's user plane and control plane protocol functions.
  • Figure 1c is an LTE system architecture diagram.
  • the 4G core network can be an evolved packet core (EPC), including network elements such as mobility management entity (MME) and serving gateway (S-GW).
  • EPC evolved packet core
  • MME mobility management entity
  • S-GW serving gateway
  • the 4G wireless access network can be E-UTRAN, which can include network elements such as 4G base stations (denoted as eNB) and 5G base stations connected to the EPC (denoted as en-gNB).
  • the serving base station eNB of the terminal device is responsible for providing the user plane and control plane protocol functions of LTE for the UE; the serving base station en-gNB of the terminal device is responsible for providing the user plane of 5G NR for the terminal device. with control plane protocol functionality.
  • the network device can initiate paging to the terminal device.
  • paging means that the network device will send a paging message to a certain terminal device at the paging occasion (PO) calculated by the network device, and the terminal device receives the paging message at the same PO, thereby realizing search under the network.
  • PO paging occasion
  • paging supports discontinuous reception (DRX), which allows the terminal device to wake up only within a fixed time to receive paging messages, and sleep during the rest of the time to reduce power consumption and increase battery life.
  • DRX discontinuous reception
  • the cycle of each wake-up is a DRX cycle.
  • One PF corresponds to one or more POs, and a terminal device needs to be on a certain PO.
  • Receive paging messages Receive paging messages.
  • the PF and PO used for paging are determined in the following manner.
  • the system frame number of PF (recorded as (SFN+PF_offset)mod T) is determined by the following method:
  • the index of PO (recorded as i_s) is determined in the following way:
  • i_s floor(terminal equipment_ID/N)mod Ns;
  • T DRX cycle of the terminal device.
  • N The number of PFs in a paging cycle.
  • PF_offset offset of PF.
  • UE_ID 5G-S-TMSI mod 1024.
  • Figure 2a is a basic flow diagram of paging. The entire process of paging initiated from the core network.
  • the core network element (such as AMF) sends the NGAP paging message to the access network element (such as gNB), which carries the terminal device paging record list, which contains the 5G-s-temporary mobile subscriber identification code (5G S -Temporary mobile subscription identifier, 5G-s-TMSI) is brought to network equipment.
  • the access network element such as gNB
  • the access network element After the access network element receives the NGAP paging message, it can calculate the specific PF and PO locations based on the paging parameters and 5G-S-TMSI.
  • the terminal device calculates the specific PF and PO locations of the paging based on the terminal device identification 5G-S-TMSI, and uses the paging message-wireless network temporary identifier (P-RNTI) to descramble at that moment.
  • P-RNTI paging message-wireless network temporary identifier
  • one of the main reasons for generating false paging alarms is that there are multiple terminal devices monitoring the same PO, because according to the calculation formula specified in the protocol, although the 5G-S allocated under one core network - The TMSI can be different, but the UE_ID (i.e. 5G-S-TMSI mod 1024) may be the same. According to the above PF and PO determination methods, the PO positions calculated by different terminal devices may be the same. In addition, under the paging mechanism, the terminal device obtains the scheduling information of the paging message when receiving the paging downlink control information (DCI), and cannot know whether this paging message is a paging message for itself.
  • DCI downlink control information
  • the terminal device can only determine whether this paging is for this terminal device based on the terminal device identification information in the paging message after subsequently receiving and decoding the paging message on the PDSCH. Therefore, when multiple terminal devices listen to the same PO, if a certain paging is only targeted at some of the terminal devices, then for the terminal devices that are not actually paged, there will be unnecessary paging reception, resulting in unnecessary Terminal device power consumption.
  • the mechanism of grouping terminal devices is one of the technologies to reduce false paging alarms.
  • the basic idea of this technology is to group terminal devices that monitor the same PO (that is, assign terminal devices on the same PO to different groups).
  • the PEI indicates the individual of the PO targeted by this paging.
  • the number and terminal equipment on each PO are divided into different terminal equipment subgroups. This enables the terminal equipment to know whether it needs to receive paging this time before receiving the paging PDCCH and paging PDSCH (paging message), reducing the probability of the terminal equipment receiving decoded paging unnecessarily, thereby reducing the terminal equipment's problem of not understanding the purpose of the paging. Power consumption generated by paging PDCCH and paging PDSCH (paging message) of the terminal equipment.
  • the PEI indicates the terminal equipment through the format (DCI2-7) PDCCH. It can indicate whether the following POs and the subgroup of terminal equipment in each PO need to monitor the paging PDCCH and paging PDSCH (paging message).
  • An implementation example is shown in Figure 2b.
  • Terminal equipment 1 (denoted as UE1 in the figure) and terminal equipment 4 (denoted as UE4 in the figure) are the terminal equipment subgroup 1 of the first PO.
  • the first subgroup in M subgroups since the indication is "1", indicates that terminal equipment 1 and terminal equipment 4 need to monitor the PDCCH at the position of the first PO.
  • terminal equipment 2 (denoted as UE2 in the figure) and terminal equipment 3 (denoted as UE3 in the figure) are the terminal equipment subgroup 2 of the first PO.
  • terminal equipment subgroup 2 of the first PO Through the first subgroup of the M subgroups to which the first PO belongs in the PEI, Group, since the indication is "0", it indicates that terminal equipment 2 and terminal equipment 3 do not need to monitor the PDCCH at the position of the first PO.
  • new indication information is added to SIB1 sent by the network device (for example, the indication information can be the lastUsedCellOnly-r17 information element in the pei-Config-r17 information element).
  • the terminal equipment needs to determine whether the current cell is Determine whether to monitor PEI for your last used cell.
  • how to determine the cell last used by the terminal device is an urgent technical problem that needs to be solved.
  • the terminal device can determine its last used cell based on the RRC release message. Specifically, the cell in which the terminal device recently received the RRCRelease message that does not contain the noLastCellUpdate-r17 information element is the last used cell of the terminal device. In other words, the noLastCellUpdate-r17 cell is added to the RRCRelease message. If the noLastCellUpdate-r17 cell exists, the last used cell for PEI is not updated. Otherwise, it is updated to the current cell. However, for the terminal device, in the process of determining the last used cell based on this implementation method, there may be an error update process.
  • Figure 3a hereinafter referred to as scenario one
  • Figure 3b hereinafter referred to as scenario two).
  • the terminal device that supports the PEI capability first resides on cell A and then establishes a connection. After the terminal device receives the RRCRelease message from cell A, the SIB1 broadcast by cell A and the PEI configuration include lastUsedCellOnly- r17 cell, and the noLastCellUpdate-r17 cell does not exist in the RRCRelease message from cell A, the terminal device will save the last used cell as cell A.
  • NAS non-access stratum
  • AS access stratum
  • the terminal device that supports PEI capability first camps on the NR network device cell A, and then establishes the link.
  • the terminal device receives the air interface RRCRelease message of gNB.
  • Cell A The broadcast SIB1 and PEI configuration contain the lastUsedCellOnly-r17 cell, and the noLastCellUpdate-r17 cell does not exist in the air interface RRCRelease message.
  • the terminal device will save the last used cell as cell A.
  • the terminal device may camp through reselection/redirection. to cell B, and then initiate link establishment in cell B. Because the access network element is temporarily overloaded or the access network element temporarily discovers that the core network element is overloaded, the connection between the access network element and the core network element The connection cannot be established and AS security cannot be activated. Cell B will send an air interface RRCRelease message to release the terminal device, and instruct the terminal device not to update the last used cell through noLastCellUpdate.
  • the terminal device since the terminal device receives the air interface RRCRelease message in cell B of the pseudo base station, if AS security is not activated, the terminal device will ignore the waiting time (waitTime) carried in the RRCRelease message in accordance with the provisions of the protocol/standard. Something other than parameters. Regardless of whether the air interface RRCRelease message carries the noLastCellUpdate-r17 information element, the last used cell will be mistakenly updated to cell B. For this reason, subsequent reselection from cell B to cell A will result in the PEI function not being able to be used normally because the last used cell is cell B, not cell A.
  • the terminal device Since the terminal device receives the air interface RRCRelease message in Cell B, if AS security is not activated, the terminal device will ignore other content except the waiting time (waitTime) parameter carried in the RRCRelease message in accordance with the provisions of the protocol/standard. .
  • the air interface RRCRelease message carries the noLastCellUpdate-r17 information element, this information element is ignored according to the protocol, and the last used cell is mistakenly updated to cell B. For this reason, subsequent reselection from cell B to cell A will result in the PEI function not being able to be used normally because the last used cell is cell B, not cell A.
  • the present application provides a communication method and a communication device to avoid paging errors due to incorrect updates of the terminal equipment, so as to enhance the PEI function implemented by the terminal equipment based on the first information and reduce the The power consumption of the terminal device. This will be further explained below with reference to the accompanying drawings.
  • Figure 4 is a schematic diagram of an implementation of the communication method provided by this application.
  • the network device sends the first message.
  • the network device sends the first message in step S401, and accordingly, the terminal device receives the first message in step S401.
  • the first message is used to instruct to release the radio resource control (radio resource control, RRC) connection between the terminal device and the network device.
  • RRC radio resource control
  • the message name of the first message used to instruct the release of the RRC connection between the terminal device and the network device may be the RRC release (RRCReleace) message.
  • This name is the name in the current communication system.
  • the name of the message used to indicate releasing the RRC connection between the terminal device and the network device may change with the evolution of the communication system.
  • the terminal device determines not to update the first information.
  • the terminal device determines not to update the first information in step S402.
  • the first information is used to indicate the cell last used by the terminal device.
  • the last used cell (last used cell) of the terminal device indicated by the first information can be called the cell to which the terminal device has recently accessed, the cell to which the terminal device has recently visited, the cell to which the terminal device has been released from connection, and the cell to which the terminal device has been released.
  • the terminal device determines not to update the first information, which can be expressed as the terminal device does not update the first information, or it can also be expressed as the terminal device does not need to identify whether the first message carries an instruction to update (or not Updated) First Information Instruction Letter information and determines not to update the first information, it can also be expressed as the terminal device does not update the first information, it can also be expressed as the terminal device maintains the first information unchanged, it can also be expressed as the first information maintained by the terminal device remains unchanged, etc. .
  • the first information that the terminal device determines not to update in step S402 includes the cell information last used by the terminal device.
  • the first information may include the identity of the cell last used by the terminal device.
  • the identity may be a cell global identifier (CGI), a physical cell identifier (PCI), etc.
  • the last used cell indicated by the first information maintained by the terminal device before step S401 is cell 1.
  • the terminal device receives the first message from cell 2 in step S401 (cell 2 is located in one or more cells corresponding to the network device that sent the first message in step S401).
  • the terminal device determines not to Update the first information, that is, the terminal device determines in step S402 that there is no need to update the maintained first information, and the last used cell indicated by the maintained first information is still cell 1.
  • the terminal device receives the first message from cell 2 in step S401 (cell 2 is located in one or more cells corresponding to the network device that sent the first message in step S401).
  • the terminal device determines not to Update the first information, that is, the terminal device determines in step S402 that there is no need to update the maintained first information, and still maintains that the last used cell indicated by the first information is empty (that is, cell 2 is not maintained as the first information). The last used cell indicated).
  • the network device determines that the terminal device ( The first information, which is used to indicate the cell last used by the terminal device, will not be updated after step S401 (for example, in step S402). Specifically, when the access layer security between the terminal device and the network device is not activated, the network device may determine that it cannot communicate with the terminal device based on the access layer security mechanism. To this end, the network The device determines that the terminal device does not update the first information, so that the network device and the terminal device align their understanding of the first information, in order to reduce the possibility of communication errors.
  • the first information which is used to indicate the cell last used by the terminal device
  • the first message received by the terminal device in step S401 contains first indication information, and the first indication information is used to indicate not to update the first information; accordingly, in step S402, in When the access layer security between the terminal device and the network device is not activated, the terminal device ignores the first indication information. Specifically, when the access layer security between the terminal device and the network device is not activated, the terminal device may determine that it cannot communicate with the network device based on the access layer security mechanism. To this end, the terminal The device may ignore the first indication information carried in the first message and determine not to update the first information. In other words, the terminal device may determine not to update the first information without identifying whether the first message carries indication information indicating updating (or not updating) the first information, so as to avoid paging errors caused by mis-updates by the terminal device. Appear.
  • the name of the first indication information may be noLastCellUpdate cell/field/domain/parameter. This name is the name in the current communication system. In the future communication system, The name of the first indication information may change with the evolution of the communication system.
  • the first message received by the terminal device in step S401 includes second indication information
  • the second indication information is used to indicate the waiting time (wait time) for accessing the network; accordingly, in step S401 In S402, the terminal device ignores at least one piece of information in the first message except the second indication information.
  • the at least one piece of information includes first indication information, and the first indication information is used to indicate not to update the first information.
  • the first message received by the terminal device may include second indication information indicating the waiting time for accessing the network, so that the terminal device can subsequently re-establish the connection with the network device based on the second indication information.
  • the terminal device may determine that it cannot communicate with the network device based on the access layer security mechanism. To this end, the terminal device At least one piece of information in the first message except the second indication information may be ignored.
  • the terminal device ignoring at least one piece of information in the first message except the second indication information may include the terminal device ignoring other information in the first message except the second indication information.
  • the second indication information can also be expressed in other ways, including: the second indication information is used to indicate the timing duration of timer T302 (where T302 indicates the waiting time for the terminal device to re-establish or restore the RRC connection); The indication information is used to indicate the waiting time for an access attempt of the terminal device, and the second indication information is used to indicate the waiting time for controlling the terminal device to establish an RRC connection, etc.
  • the name of the second indication information may be a waitTime cell/field/domain/parameter. This name is the name in the current communication system. In the future communication system, the name of the second indication information may be the waitTime cell/field/domain/parameter. The name of the message may change as communication systems evolve.
  • the network device determines that the terminal device ignores the first message except the second indication information.
  • the at least one piece of information includes first indication information, the first indication information is used to indicate not to update the first information, and the first information is used to indicate the cell last used by the terminal equipment.
  • the first message sent by the network device in step S401 may include second indication information indicating the waiting time for accessing the network, so that the terminal device can subsequently re-establish communication with the network device based on the second indication information. connections between.
  • the network device may determine that it cannot communicate with the terminal device based on the access layer security mechanism. To this end, the network device It may be determined that the terminal device ignores at least one piece of information in the first message except the second indication information, so that the network device and the terminal device can align their understanding of the first message, in order to reduce the possibility of communication errors.
  • the terminal device determines in step S402 that the access layer security between the terminal device and the network device is not activated, including: the terminal device determines that no reception to the security mode command message; after the terminal device receives the security mode command message, the terminal device determines that the process of deriving the key based on the security mode command message has failed; or, after the terminal device receives the security mode command message, the terminal device It is determined that the integrity protection check corresponding to the security mode command message has failed. Specifically, the terminal device can determine that the access layer security between the terminal device and the network device is not activated through the above multiple methods to improve the flexibility of solution implementation.
  • the method further includes: the terminal device sending first capability information, the first capability information indicating that the terminal device supports PEI.
  • the terminal device may send first capability information indicating that the terminal device supports PEI to the network device, so that the network device determines that the terminal device supports PEI based on the first capability information and communicates with the terminal device based on the PEI mechanism.
  • the method further includes: the terminal device receiving third indication information, the third indication information indicating that the network device supports PEI .
  • the network device may send third indication information indicating that the network device supports PEI to the terminal device, so that the terminal device determines that the network device supports PEI based on the third indication information and communicates with the network device based on the PEI mechanism.
  • the terminal device and the network device can also learn the capability information of the opposite end through other implementations.
  • the other devices may be core network devices, sidelink devices, servers, etc.
  • Another example is the implementation of protocol/standard preconfiguration.
  • step S402 when the access layer security between the terminal device and the network device is not activated.
  • the following will describe the implementation process that the network device may perform in this case.
  • the implementation process is described as an example.
  • the network device determines that the first message has been sent in step S401 and the access layer security between the terminal device and the network device is not activated, in step S403, the network device It is determined not to update the second information, where the second information is used to indicate one or more cells visited by the terminal device.
  • the network device may maintain second information indicating one or more cells visited by the terminal device.
  • the network device sends the first message instructing to release the RRC connection between the terminal device and the network device and releases the RRC connection
  • the access layer security between the terminal device and the network device is not activated.
  • the network device determines not to update the second information.
  • the network device may determine that it cannot communicate with the terminal device based on the access layer security mechanism.
  • the network device determines not to update the second information in a manner such that the network device does not update the second information based on the cell that sent the first message (the cell is located in one or more cells corresponding to the network device), which can avoid Paging errors occur due to incorrect updates of network equipment, so as to enhance the PEI function implemented by the network equipment based on the second information and reduce the power consumption of the network equipment.
  • the network device determines not to update the second information, which can be expressed as the network device does not update the second information, or it can also be expressed as the network device does not need to identify whether the first message carries an indication to update (or not update) the first information.
  • Instructing information to determine not to update the second information can also be expressed as the network device does not update the second information, it can also be expressed as the network device maintains the second information unchanged, or it can be expressed as the network device maintains the second information unchanged. wait.
  • step S403 the network device determines that the terminal device ignores the first indication information. Specifically, when the access layer security between the terminal device and the network device is not activated, the network device may determine that it cannot communicate with the terminal device based on the access layer security mechanism. To this end, the network The device determines that the terminal device ignores the first indication information, so that the network device and the terminal device align their understanding of the first information, in order to reduce the possibility of communication errors.
  • the network device sends the second information to the core network device.
  • the network device may also send second information indicating one or more cells that the terminal device has visited to the core network device, so that the core network device and the network device can align the two to the second information. understanding in order to reduce the possibility of communication errors.
  • the network device after the network device sends the first message in step S401, the network device releases the RRC connection with the terminal device in step S404. After the terminal device receives the first message in step S401, the terminal device releases the RRC connection with the network device in step S404.
  • step S402 and step S404 are both performed after step S401, but the execution order of step S402 and step S404 is not limited in this embodiment.
  • step S402 may be performed after step S404, or step S404 may be performed after step S402.
  • step S403 the execution processes of steps S403 and S404 are both performed after step S401.
  • the execution order of steps S403 and S404 is not limited in this embodiment.
  • step S403 may be performed after step S404, or step S404 may be performed after step S403.
  • step S404 when the terminal device releases the RRC connection, it can be understood that the terminal device exits the RRC connection state.
  • the terminal device can enter other states besides the RRC connection state, such as the idle state (idle state). Activated state (inactive state), etc.
  • the terminal device may enter the idle state.
  • the terminal device can maintain first information indicating the cell last used by the terminal device.
  • the terminal device receives the first message instructing to release the RRC connection between the terminal device and the network device in step S401 and releases the RRC connection in step S404
  • the connection between the terminal device and the network device is
  • the terminal device determines not to update the first information in step S402.
  • the terminal device may determine that it cannot communicate with the network device based on the access layer security mechanism.
  • the terminal device determines not to update the first information in a manner such that the terminal device does not update the first information based on the cell that sent the first message (the cell is located in one or more cells corresponding to the network device), which can avoid Paging errors occur due to incorrect updates of the terminal equipment, so as to enhance the PEI function implemented by the terminal equipment based on the first information and reduce the power consumption of the terminal equipment.
  • the terminal device determines not to update the first information in step S402 (or the network device determines not to update the first information in step S403 Determine that the terminal device does not update the first information), in this way, the terminal device (or network device) can ignore the relevant indication information in the first message used to indicate updating (or not updating) the first information (for example, as mentioned above first indication information); in other words, in the embodiment shown in Figure 4, the terminal device (or network device) does not need to read the relevant indication information in the first message used to indicate updating (or not updating) the first information, By default, it is determined that the terminal device does not update the first information, which can avoid paging errors due to mistaken updates by the terminal device, thereby enhancing the PEI function implemented by the terminal device based on the first information and reducing the power consumption of the terminal device. In order to solve the aforementioned technical problem of "how to determine the cell last used by the terminal equipment".
  • the terminal device does not need to read the relevant indication information in the first message for instructing to update (or not update) the first information, and determines that the terminal is determined by default.
  • the device does not update the first information; in the embodiment shown in Figure 5 and Figure 6 below, the terminal device (or network device) needs to read the relevant information in the first message to indicate updating (or not updating) the first information. Instruction information, and perform corresponding operations based on the relevant instruction information.
  • Figure 5 is a schematic diagram of an implementation of the communication method provided by this application.
  • step S501 and step S504 can refer to the implementation process of step S401 and step S404 in Figure 4, and achieve corresponding technical effects, which will not be described in detail below.
  • the network device sends the first message.
  • the network device sends the first message in step S501, and accordingly, the terminal device receives the first message in step S501.
  • the first message is used to instruct to release the radio resource control (radio resource control, RRC) connection between the terminal device and the network device.
  • RRC radio resource control
  • the terminal device determines not to ignore the first indication information in the first message, or the terminal device ignores at least one piece of information in the first message except the first indication information and the second indication information.
  • the terminal device determines not to ignore the first indication information in the first message in step S502, Alternatively, the terminal device ignores at least one piece of information in the first message except the first indication information and the second indication information.
  • the first indication information is used to indicate not to update the first information
  • the first information is used to indicate the cell last used by the terminal device
  • the second indication information is used to indicate the waiting time for accessing the network.
  • the network device after sending the first message in step S501, when the access layer security between the terminal device and the network device is not activated, the network device determines The terminal device (which will be after step S501, such as step S502) does not ignore the first indication information in the first message, or the network device determines that the terminal device (which will be after step S501, such as step S502) ) ignore at least one piece of information in the first message except the first indication information and the second indication information.
  • the network device may determine that it cannot communicate with the terminal device based on the access layer security mechanism.
  • the network The device determines that the terminal device does not ignore the first indication information in the first message (or, the network device determines that the terminal device ignores at least one piece of information in the first message except the first indication information and the second indication information) , so as to facilitate the network device and the terminal device to align their understanding of the first information, in order to reduce the possibility of communication errors.
  • the terminal device ignoring at least one piece of information in the first message other than the first indication information and the second indication information may include: the terminal device ignoring the first message except the first indication information and the second indication.
  • Information other than information may include: the terminal device ignoring the first message except the first indication information and the second indication.
  • the method further includes: the terminal device determining not to update the first information according to the first indication information.
  • the process of the terminal device determining not to ignore the first indication information may include the terminal device determining not to update the first information based on the first indication information, so that the terminal device determines not to update the first information based on the first indication information sent by the network device.
  • the first information is updated so that the terminal device and the network device align their understanding of the first indication information, in order to reduce the possibility of communication errors.
  • the first information includes cell information last used by the terminal device.
  • the first information may include the identity of the cell last used by the terminal device.
  • the identity may be CGI, PCI, etc.
  • the terminal device determines in step S502 that the access layer security between the terminal device and the network device is not activated, including: the terminal device determines that no reception to the security mode command message; after the terminal device receives the security mode command message, the terminal device determines that the process of deriving the key based on the security mode command message has failed; or, after the terminal device receives the security mode command message, the terminal device It is determined that the integrity protection check corresponding to the security mode command message has failed. Specifically, the terminal device can determine that the access layer security between the terminal device and the network device is not activated through the above multiple methods to improve the flexibility of solution implementation.
  • step S502 when the access layer security between the terminal device and the network device is not activated.
  • the following will describe the implementation process that the network device may perform in this case.
  • the implementation process is described as an example.
  • the network device determines not to ignore the first indication information in the first message, Alternatively, the network device ignores at least one piece of information in the first message except the first indication information and the second indication information.
  • the network device may determine that it cannot communicate with the terminal device based on the access layer security mechanism. Therefore, the network device determines a way not to ignore the first indication information in the first message (or, the network device ignores at least one piece of information in the first message except the first indication information and the second indication information), Making it clear to the network device that the terminal device will not update the first information based on the cell that sent the first message (the cell is located in one or more cells corresponding to the network device) can avoid paging errors caused by mis-updates by the terminal device. situation occurs, so as to enhance the PEI function implemented by the terminal device based on the first information and reduce the power consumption of the terminal device.
  • the network device determines a way not to ignore the first indication information in the first message (or the network device ignores at least one piece of information in the first message except the first indication information and the second indication information), and further The understanding of the first indication information between the terminal device and the network device can be aligned, so as to reduce the possibility of communication errors.
  • the network device ignoring at least one piece of information in the first message except the first indication information and the second indication information may include: the network device ignoring the first message except the first indication information and the second indication.
  • Information other than information may include: the network device ignoring the first message except the first indication information and the second indication.
  • the method further includes: the network device determines not to update the second information according to the first indication information, and the second information is used for a website that the terminal device has accessed. or multiple neighborhoods. Specifically, the network device may determine not to update the second information for one or more cells visited by the terminal device according to the first indication information, so as to facilitate alignment between the terminal device and the network device for the first Directs the understanding of information with the goal of reducing the likelihood of communication errors.
  • the second information includes identification of one or more cells visited by the terminal device.
  • the identifiers of one or more cells visited by the terminal device may be CGI, PCI, etc.
  • the method further includes: the network device sending the second information to the core network device.
  • the network device may also send second information indicating one or more cells that the terminal device has visited to the core network device, so that the core network device and the network device can align the two to the second information. understanding in order to reduce the possibility of communication errors.
  • the method further includes: the terminal device sending first capability information, the first capability information indicating that the terminal device supports paging advance indication PEI.
  • the terminal device may send first capability information indicating that the terminal device supports PEI to the network device, so that the network device determines that the terminal device supports PEI based on the first capability information and communicates with the terminal device based on the PEI mechanism.
  • the method further includes: the terminal device receiving third indication information, the third indication information indicating that the network device supports PEI .
  • the network device may send third indication information indicating that the network device supports PEI to the terminal device, so that the terminal device determines that the network device supports PEI based on the third indication information and communicates with the network device based on the PEI mechanism.
  • the terminal device and the network device can also learn the capability information of the opposite end through other implementations.
  • the other devices may be core network devices, sidelink devices, servers, etc.
  • Another example is the implementation of protocol/standard preconfiguration.
  • the network device after the network device sends the first message in step S501, the network device releases the RRC connection with the terminal device in step S504. After the terminal device receives the first message in step S501, the terminal device releases the RRC connection with the network device in step S504.
  • step S502 and step S504 are both performed after step S501, but the execution order of step S502 and step S504 is not limited in this embodiment.
  • step S502 may be performed after step S504, or step S504 may be performed after step S502.
  • step S503 the execution processes of steps S503 and S504 are both performed after step S501.
  • the execution order of steps S503 and S504 is not limited in this embodiment.
  • step S503 may be performed after step S504, or step S504 may be performed after step S503.
  • the terminal device can maintain first information indicating the cell last used by the terminal device.
  • the connection between the terminal device and the network device is
  • the terminal device determines in step S502 not to ignore the first indication information in the first message, or the terminal device ignores all the first indication information and the second indication in the first message. At least one piece of information other than information.
  • the terminal device may determine that it cannot communicate with the network device based on the access layer security mechanism.
  • the terminal device determines a way not to ignore the first indication information in the first message (or, the terminal device ignores at least one piece of information in the first message except the first indication information and the second indication information), So that the terminal device will not be based on the cell that sent the first message (the cell is located in one or more cells corresponding to the network device). area), updating the first information can avoid paging errors due to incorrect updates by the terminal equipment, thereby enhancing the PEI function implemented by the terminal equipment based on the first information and reducing the power consumption of the terminal equipment.
  • the terminal device determines in step S502 not to ignore the first indication information in the first message (or, the terminal device ignores at least one piece of information in the first message except the first indication information and the second indication information)
  • This method can also align the understanding of the first indication information between the terminal device and the network device, in order to reduce the possibility of communication errors.
  • Figure 6 is a schematic diagram of an implementation of the communication method provided by this application.
  • step S601 and step S604 can refer to the implementation process of step S401 and step S404 in Figure 4, and achieve corresponding technical effects, which will not be described in detail below.
  • the network device sends the first message.
  • the network device sends the first message in step S601, and accordingly, the terminal device receives the first message in step S601.
  • the first message is used to instruct to release the radio resource control (radio resource control, RRC) connection between the terminal device and the network device.
  • RRC radio resource control
  • the terminal device processes the first information according to the first message.
  • the terminal device processes the first information according to the first message in step S602.
  • the first information is used to indicate the cell last used by the terminal device.
  • the terminal device processing the first information according to the first message includes: if the first message includes the first indication information, the terminal device determines not to update the first information.
  • a piece of information, the first indication information is used to indicate not to update the first information.
  • the terminal device determines not to update the first information, so that the terminal device performs the corresponding operation based on the instruction of the network device, In order to reduce the possibility of communication errors.
  • the terminal device processing the first information according to the first message includes: when the first message does not include the first indication information, the terminal device processes the first information based on the first indication information.
  • the cell corresponding to the message updates the first information, and the first indication information is used to indicate not to update the first information.
  • the terminal device updates the first information based on the cell corresponding to the first message, so that the terminal device performs the corresponding operation based on the instructions of the network device, in order to Reduce the possibility of communication errors.
  • the process of the terminal device updating the first information based on the cell corresponding to the first message includes: the terminal device updating the first information based on the cell identity of the cell that sent the first message, or the terminal device updating the first information based on the cell identity of the cell that sent the first message.
  • the cell identity carried in the first message updates the first information, which is not limited here.
  • the terminal device updates the first information based on the cell identity of the cell that sends the first message.
  • the terminal device updates the last used cell information indicated by the first information to send the first message.
  • the cell ID of the cell is not limited here.
  • the first information includes cell information last used by the terminal device.
  • the first information may include the identity of the cell last used by the terminal device.
  • the identity may be CGI, PCI, etc.
  • the terminal device determines in step S602 that the access layer security between the terminal device and the network device is not activated, including: the terminal device determines that no reception to the security mode command message; after the terminal device receives the security mode command message, the terminal device determines that the process of deriving the key based on the security mode command message has failed; or, after the terminal device receives the security mode command message, the terminal device It is determined that the integrity protection check corresponding to the security mode command message has failed. Specifically, the terminal device can determine that the access layer security between the terminal device and the network device is not activated through the above multiple methods to improve the flexibility of solution implementation.
  • step S602 when the access layer security between the terminal device and the network device is not activated.
  • the following will describe the implementation process that the network device may perform in this case.
  • the implementation process is described as an example.
  • the network device determines whether the terminal device updates the first information according to the first message. Specifically, the network device may also determine whether the terminal device updates the first information according to the first message, so that the network device can clarify the behavior of the terminal device in order to avoid communication errors.
  • step S603 when the network device has sent the first message in step S601 and the access layer security between the terminal device and the network device is not activated, in step S603, the network device performs the The first message processes second information, and the second information is used to indicate one or more cells visited by the terminal device.
  • the network device may maintain second information indicating one or more cells visited by the terminal device.
  • the network device sends a first message instructing to release the RRC connection between the terminal device and the network device and releases the RRC connection
  • the network device processes the second information according to the first message.
  • the network device may determine that it cannot communicate with the network device based on the access layer security mechanism. Therefore, the network device processes the first information according to the first message, so that the terminal device and the network device align their understanding of the first message, in order to reduce the possibility of communication errors.
  • the network device processing the second information according to the first message includes: in the case where the first message includes the first indication information, the network device determines not to update The second information and the first indication information are used to indicate not to update the first information, and the first information is used to indicate the cell information last used by the terminal device. Specifically, in the case where the first message includes first indication information indicating not to update the first information, the network device determines not to update the second information, so that subsequent terminal devices perform corresponding operations based on the instructions of the network device, In order to reduce the possibility of communication errors.
  • the terminal device processing the first information according to the first message includes: when the first message does not include the first indication information, the terminal device processes the first information based on the first indication information.
  • the cell corresponding to the first message updates the second information
  • the first indication information is used to indicate not to update the first information
  • the first information is used to indicate the cell information last used by the terminal device.
  • the network device updates the second information based on the cell corresponding to the first message, so that subsequent terminal devices perform corresponding operations based on the instructions of the network device, in order to Reduce the possibility of communication errors.
  • the process for the network device to update the second information based on the cell corresponding to the first message includes: the network device updates the second information based on the cell identity of the cell that sent the first message, or the network device updates the second information based on the cell identity of the cell that sent the first message.
  • the cell identity carried in the first message updates the second information, which is not limited here.
  • the method further includes: the network device sending second information to the core network device.
  • the network device may also send second information indicating one or more cells that the terminal device has visited to the core network device, so that the core network device and the network device can align the two to the second information. understanding in order to reduce the possibility of communication errors.
  • the method further includes: the terminal device sending first capability information, the first capability information indicating that the terminal device supports PEI.
  • the terminal device may send first capability information indicating that the terminal device supports PEI to the network device, so that the network device determines that the terminal device supports PEI based on the first capability information and communicates with the terminal device based on the PEI mechanism.
  • the method further includes: the terminal device receiving third indication information, the third indication information indicating that the network device supports PEI .
  • the network device may send third indication information indicating that the network device supports PEI to the terminal device, so that the terminal device determines that the network device supports PEI based on the third indication information and communicates with the network device based on the PEI mechanism.
  • the terminal device and the network device can also learn the capability information of the opposite end through other implementations.
  • the other devices may be core network devices, sidelink devices, servers, etc.
  • Another example is the implementation of protocol/standard preconfiguration.
  • the network device after the network device sends the first message in step S601, the network device releases the RRC connection with the terminal device in step S604. After the terminal device receives the first message in step S601, the terminal device releases the RRC connection with the network device in step S604.
  • step S602 and step S604 are executed after step S601, but the execution order of step S602 and step S604 is not limited in this embodiment.
  • step S602 may be performed after step S604, or step S604 may be performed after step S602.
  • step S603 the execution processes of steps S603 and S604 are both performed after step S601.
  • the execution order of steps S603 and S604 is not limited in this embodiment.
  • step S603 may be performed after step S604, or step S604 may be performed after step S603.
  • the terminal device can maintain first information indicating the cell last used by the terminal device.
  • the terminal device receives the first message indicating to release the RRC connection between the terminal device and the network device in step S601 and releases the RRC connection in step S604, the terminal device responds according to the first message in step S602. Message processing first information.
  • the terminal device may determine that it cannot communicate with the network device based on the access layer security mechanism. Therefore, the terminal device processes the first information according to the first message, so that the terminal device and the network device align their understanding of the first message, in order to reduce the possibility of communication errors.
  • FIG. 4 will be described below in conjunction with the implementation process shown in FIG. 7
  • FIG. 5 and FIG. 6 will be described below in conjunction with the implementation process shown in FIG. 8 .
  • the first message is the RRCRelease message
  • the first indication information in the first message is noLastCellUpdate cell/field/domain/parameter
  • the first information is last used cell Cells/fields/domains/parameters are taken as examples for explanation.
  • the implementation example includes the following process.
  • the terminal device that supports PEI capability updates the last used cell according to the noLastCellUpdate in the air interface RRCRelease message:
  • the terminal device updates the last used cell to the current cell.
  • the terminal device does not update the last used cell.
  • the terminal device directly ignores the noLastCellUpdate cell and does not update the last used cell.
  • the implementation example includes the following process.
  • the terminal device that supports PEI capability updates the last used cell according to the noLastCellUpdate in the air interface RRCRelease message:
  • the terminal device updates the last used cell to the current cell.
  • the terminal device does not update the last used cell.
  • the noLastCellUpdate cell in the air interface RRCRelease message will not be ignored and the last used cell will still be updated based on it:
  • the terminal device updates the last used cell to the current cell.
  • the terminal device does not update the last used cell.
  • the present application is introduced from the perspective of the method above, and the communication device provided by the present application is described below.
  • an embodiment of the present application provides a communication device 900.
  • the communication device 900 can realize the functions of the terminal device or network device in the above method embodiment, and therefore can also realize the beneficial effects of the above method embodiment.
  • the communication device 900 may be a terminal device or a network device, or may be an integrated circuit or component within the terminal device or the network device, such as a chip.
  • the following embodiments will be described by taking the communication device 900 as a terminal device or a network device as an example.
  • the device when the device 900 is used to perform the method performed by the terminal device in the previous embodiment, the device includes a processing unit 901 and a transceiver unit 902; when the transceiver unit 902 receives the first message and When the access layer security between the terminal device and the network device is not activated, the processing unit 901 determines not to update the first information.
  • the first information is used to indicate the cell last used by the terminal device.
  • the first message It is used to instruct to release the radio resource control RRC connection between the terminal device and the network device; the processing unit 901 releases the RRC connection.
  • the first message includes first indication information, and the first indication information is used to indicate not to update the first information; the access layer security between the terminal device and the network device has not been updated. If activated, the processing unit 901 is also configured to ignore the first indication information.
  • the first message includes second indication information, the second indication information is used to indicate the waiting time for accessing the network; the processing unit 901 is also configured to ignore the first message except for the third At least one piece of information other than the two indication information, the at least one piece of information includes first indication information, and the first indication information is used to indicate not to update the first information.
  • the first information includes cell information last used by the terminal device.
  • the processing unit 901 determines that the access layer security between the terminal device and the network device is not activated, including: the processing unit 901 determines that no security mode command message; after the transceiver unit 902 receives the security mode command message, the processing unit 901 determines that the process of deriving the key based on the security mode command message fails; or, after the transceiver unit 902 receives the security mode command message, The processing unit 901 determines that the integrity protection check corresponding to the security mode command message fails.
  • the transceiver unit 902 is also configured to send first capability information, where the first capability information indicates that the terminal device supports paging advance indication PEI.
  • the transceiver unit 902 is also configured to receive third indication information, where the third indication information indicates that the network device supports PEI.
  • the device when the device 900 is used to perform the method performed by the network device in the previous embodiment, the device includes a processing unit 901 and a transceiver unit 902; after the transceiver unit 902 has sent the first message and When the access layer security between the terminal device and the network device is not activated, the processing unit 901 determines not to update the second information.
  • the second information is used to indicate one or more cells that the terminal device has visited.
  • the first message is used to indicate releasing the radio resource control RRC connection between the terminal device and the network device; the processing unit 901 releases the RRC connection.
  • the first message includes first indication information, the first indication information is used to indicate not to update the first information, and the first information is used to indicate the cell last used by the terminal device; in the When the access layer security between the terminal device and the network device is not activated, the processing unit 901 determines that the terminal device ignores the first indication information.
  • the first message includes second indication information
  • the second indication information is used to indicate the waiting time for accessing the network; the access layer security between the terminal device and the network device has not been established. If activated, the processing unit 901 determines that the terminal device ignores at least one piece of information in the first message except the second indication information, where the at least one piece of information includes first indication information, and the first indication information is used to indicate The first information is not updated, and the first information is used to indicate the cell last used by the terminal device.
  • the processing unit 901 determines that the terminal device does not update the first information, and the first information is used to Indicates the cell last used by the terminal device.
  • the first information includes cell information last used by the terminal device.
  • the second information includes identification of one or more cells visited by the terminal device.
  • the transceiver unit 902 is also configured to send the second information to the core network device.
  • the transceiver unit 902 is also configured to send third indication information, where the third indication information indicates that the network device supports PEI.
  • the device when the device 900 is used to perform the method performed by the terminal device in the previous embodiment, the device includes a processing unit 901 and a transceiver unit 902; when the transceiver unit 902 receives the first message and When the access layer security between the terminal device and the network device is not activated, the processing unit 901 determines not to ignore the first indication information in the first message, or the processing unit 901 ignores the first indication information in the first message.
  • At least one piece of information in addition to the first indication information and the second indication information; wherein the first message is used to indicate releasing the radio resource control RRC connection between the terminal device and the network device, and the first indication information is used to indicate The first information is not updated, the first information is used to indicate the cell last used by the terminal device, and the second indication information is used to indicate the waiting time for accessing the network; the processing unit 901 releases the RRC connection.
  • the processing unit 901 is further configured to determine not to update the first information according to the first indication information.
  • the first information includes cell information last used by the terminal device.
  • the processing unit 901 determines that the access layer security between the terminal device and the network device is not activated, including: the processing unit 901 determines that no security mode command message; after the transceiver unit 902 receives the security mode command message, the processing unit 901 determines that the process of deriving the key based on the security mode command message fails; or, after the transceiver unit 902 receives the security mode command message, The processing unit 901 determines that the integrity protection check corresponding to the security mode command message fails.
  • the transceiver unit 902 is also configured to send first capability information, where the first capability information indicates that the terminal device supports paging advance indication PEI.
  • the transceiver unit 902 is also configured to receive third indication information, where the third indication information indicates that the network device supports PEI.
  • the device when the device 900 is used to perform the method performed by the network device in the previous embodiment, the device includes a processing unit 901 and a transceiver unit 902; after the transceiver unit 902 has sent the first message and When the access layer security between the terminal device and the network device is not activated, the processing unit 901 determines not to ignore the first indication information in the first message, or the processing unit 901 ignores all other information in the first message.
  • At least one piece of information other than the first indication information and the second indication information wherein the first message is used to indicate releasing the radio resource control RRC connection between the terminal device and the network device, and the first indication information is used to indicate not to Update the first information, the first information is used to indicate the cell last used by the terminal device, and the second indication information is used to indicate the waiting time for accessing the network; the processing unit 901 releases the RRC connection.
  • the processing unit 901 is further configured to determine not to update second information according to the first indication information, where the second information is used for one or more cells visited by the terminal device.
  • the second information includes identification of one or more cells visited by the terminal device.
  • the first information includes cell information last used by the terminal device.
  • the processing unit 901 determines that the terminal device does not ignore the first indication information in the first message. , or the processing unit 901 determines that the terminal device ignores at least one piece of information in the first message except the first indication information and the second indication information.
  • the transceiver unit 902 is also used to send the second information to the core network device.
  • the transceiver unit 902 is also configured to receive first capability information, where the first capability information indicates that the terminal device supports paging advance indication PEI.
  • the transceiver unit 902 is also configured to send third indication information, where the third indication information indicates that the network device supports PEI.
  • the device when the device 900 is used to perform the method performed by the terminal device in the previous embodiment, the device includes a processing unit 901 and a transceiver unit 902; when the transceiver unit 902 receives the first message and When the access layer security between the terminal device and the network device is not activated, the processing unit 901 processes the first information according to the first message, and the first information is used to indicate that the terminal device The first message is used to indicate the release of the radio resource control RRC connection between the terminal device and the network device; the processing unit 901 releases the RRC connection.
  • the processing unit 901 processing the first information according to the first message includes: if the first message includes the first indication information, the processing unit 901 determines not to update the first information, The first indication information is used to indicate not to update the first information.
  • the processing unit 901 processing the first information according to the first message includes: when the first message does not include the first indication information, the processing unit 901 processes the first information based on the first message corresponding to the first message.
  • the cell updates the first information, and the first indication information is used to indicate not to update the first information.
  • the first information includes cell information last used by the terminal device.
  • the processing unit 901 determines that the access layer security between the terminal device and the network device is not activated, including: the processing unit 901 determines that no security mode command message; after the transceiver unit 902 receives the security mode command message, the processing unit 901 determines that the process of deriving the key based on the security mode command message fails; or, after the transceiver unit 902 receives the security mode command message, The processing unit 901 determines that the integrity protection check corresponding to the security mode command message fails.
  • the transceiver unit 902 is also configured to send first capability information, where the first capability information indicates that the terminal device supports paging advance indication PEI.
  • the transceiver unit 902 is also configured to receive third indication information, where the third indication information indicates that the network device supports PEI.
  • the device when the device 900 is used to perform the method performed by the network device in the previous embodiment, the device includes a processing unit 901 and a transceiver unit 902; after the transceiver unit 902 has sent the first message and When the access layer security between the terminal device and the network device is not activated, the processing unit 901 processes the second information according to the first message, and the second information is used to indicate one or more information accessed by the terminal device. cell, the first message is used to instruct to release the radio resource control RRC connection between the terminal device and the network device; the processing unit 901 releases the RRC connection.
  • the processing unit 901 processing the second information according to the first message includes: if the first message includes the first indication information, the processing unit 901 determines not to update the second information, The first indication information is used to indicate not to update the first information, and the first information is used to indicate cell information last used by the terminal device.
  • the processing unit 901 processing the first information according to the first message includes: when the first message does not include the first indication information, the processing unit 901 processes the first information based on the first message corresponding to the first message.
  • the cell updates the second information, the first indication information is used to indicate not to update the first information, and the first information is used to indicate the cell information last used by the terminal equipment.
  • the first information includes cell information last used by the terminal device.
  • the second information includes identification of one or more cells visited by the terminal device.
  • the processing unit 901 determines whether the terminal device updates the first information according to the first message.
  • the transceiver unit 902 is also configured to receive first capability information, where the first capability information indicates that the terminal device supports paging advance indication PEI.
  • the transceiver unit 902 is also configured to send third indication information, where the third indication information indicates that the network device supports PEI.
  • FIG. 10 is another schematic structural diagram of a communication device 1000 provided in this application.
  • the communication device 1000 at least includes an input and output interface 1002 .
  • the communication device 1000 may be a chip or an integrated circuit.
  • the communication device also includes a logic circuit 1001.
  • the transceiver unit 902 shown in FIG. 9 may be a communication interface, and the communication interface may be the input-output interface 1002 in FIG. 10 .
  • the input-output interface 1002 may include an input interface and an output interface.
  • the communication interface may also be a transceiver circuit, and the transceiver circuit may include an input interface circuit and an output interface circuit.
  • the logic circuit 1001 determines not to update the first information.
  • the first information is used to indicate the cell last used by the terminal device.
  • the first message is used to indicate releasing the connection between the terminal device and the network device.
  • the radio resource controls the RRC connection; the logic circuit 1001 releases the RRC connection.
  • the logic circuit 1001 determines not to update the second information.
  • the second information is used to indicate one or more cells that the terminal device has visited.
  • the first message is used to indicate releasing the terminal device from the network.
  • the logic circuit 1001 determines not to ignore the first indication information in the first message, or the logic circuit 1001 ignores the first indication information except the first indication information and the second indication information.
  • the first message is used to indicate releasing the radio resource control RRC connection between the terminal device and the network device, the first indication information is used to indicate not to update the first information, and the first information is used to Indicates the cell last used by the terminal device, and the second indication information is used to indicate the waiting time for accessing the network; the logic circuit 1001 releases the RRC connection.
  • the logic circuit 1001 determines not to ignore the first indication information in the first message, or the logic circuit 1001 ignores the first indication information except the first indication information and the second indication information.
  • the first message is used to indicate releasing the radio resource control RRC connection between the terminal device and the network device, the first indication information is used to indicate not to update the first information, and the first information is used to indicate The cell last used by the terminal device, the second indication information is used to indicate the waiting time for accessing the network; the logic circuit 1001 releases the RRC connection.
  • the logic circuit 1001 processes the first information according to the first message.
  • the first information is used to indicate the cell information last used by the terminal equipment.
  • the first message is used to indicate the release of the terminal equipment and The radio resource control RRC connection between network devices; the logic circuit 1001 releases the RRC connection.
  • the logic circuit 1001 processes the second information according to the first message.
  • the second information is used to indicate one or more cells that the terminal device has visited.
  • the first message is used to indicate releasing the terminal.
  • the logic circuit 1001 and the input-output interface 1002 can also perform other steps performed by the network device in any embodiment and achieve corresponding beneficial effects, which will not be described again here.
  • the processing unit 901 shown in Figure 9 may be the logic circuit 1001 in Figure 10.
  • the logic circuit 1001 may be a processing device, and the functions of the processing device may be partially or fully implemented through software. Among them, the functions of the processing device can be partially or fully implemented through software.
  • the processing device may include a memory and a processor, wherein the memory is used to store a computer program, and the processor reads and executes the computer program stored in the memory to perform corresponding processing and/or steps in any method embodiment. .
  • the processing means may comprise only a processor.
  • the memory for storing computer programs is located outside the processing device, and the processor is connected to the memory through circuits/wires to read and execute the computer programs stored in the memory.
  • the memory and processor can be integrated together, or they can also be physically independent of each other.
  • the processing device may be one or more chips, or one or more integrated circuits.
  • the processing device may be one or more field-programmable gate arrays (FPGA), application specific integrated circuit (ASIC), system on chip (SoC), central processing unit (central processor unit, CPU), network processor (network processor, NP), digital signal processing circuit (digital signal processor, DSP), microcontroller unit (MCU), programmable logic device (PLD) or other integrated chips, or any combination of the above chips or processors, etc.
  • FPGA field-programmable gate arrays
  • ASIC application specific integrated circuit
  • SoC system on chip
  • CPU central processor unit
  • CPU central processor unit
  • NP network processor
  • DSP digital signal processing circuit
  • MCU microcontroller unit
  • PLD programmable logic device
  • FIG 11 is a communication device 1100 involved in the above embodiment provided by an embodiment of the present application.
  • the communication device 1100 can specifically be a communication device serving as a terminal device in the above embodiment.
  • the example shown in Figure 11 is a terminal
  • the device is implemented through a terminal device (or a component in the terminal device).
  • the communication device 1100 may include but is not limited to at least one processor 1101 and a communication port 1102.
  • the device may also include at least one of a memory 1103 and a bus 1104.
  • the at least one processor 1101 is used to control the actions of the communication device 1100.
  • the processor 1101 may be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It may implement or execute the various illustrative logical blocks, modules, and circuits described in connection with this disclosure.
  • the processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on.
  • the communication device 1100 shown in Figure 11 can be specifically used to implement the steps implemented by the terminal device in the foregoing method embodiment, and to achieve the corresponding technical effects of the terminal device.
  • the specific implementation methods of the communication device shown in Figure 11 are all Reference may be made to the descriptions in the foregoing method embodiments, which will not be described again here.
  • FIG. 12 is a schematic structural diagram of the communication device 1200 involved in the above embodiment provided by the embodiment of the present application.
  • the communication device 1200 can specifically be the communication device as a network device in the above embodiment, as shown in Figure 12
  • An example is that the network device is implemented by a network device (or a component in the network device), wherein the structure of the communication device may refer to the structure shown in FIG. 12 .
  • the communication device 1200 includes at least one processor 1211 and at least one network interface 1214. Further optionally, the communication device further includes at least one memory 1212, at least one transceiver 1213 and one or more antennas 1215.
  • the processor 1211, the memory 1212, the transceiver 1213 and the network interface 1214 are connected, for example, through a bus. In the embodiment of the present application, the connection may include various interfaces, transmission lines or buses, etc., which is not limited in this embodiment.
  • Antenna 1215 is connected to transceiver 1213.
  • the network interface 1214 is used to enable the communication device to communicate with other communication devices through communication links.
  • the network interface 1214 may include a network interface between a communication device and a core network device, such as an S1 interface, and the network interface may include a network interface between a communication device and other communication devices (such as other network devices or core network devices), such as an X2 Or Xn interface.
  • a network interface between a communication device and a core network device such as an S1 interface
  • the network interface may include a network interface between a communication device and other communication devices (such as other network devices or core network devices), such as an X2 Or Xn interface.
  • the processor 1211 is mainly used to process communication protocols and communication data, control the entire communication device, execute software programs, and process data of the software programs, for example, to support the communication device to perform actions described in the embodiments.
  • the communication device may include a baseband processor and a central processing unit.
  • the baseband processor is mainly used to process communication protocols and communication data.
  • the central processing unit is mainly used to control the entire terminal device, execute software programs, and process data of the software programs.
  • the processor 1211 in Figure 12 can integrate the functions of the baseband processor and the central processor. Those skilled in the art can understand that the baseband processor and the central processor can also be independent processors, interconnected through technologies such as buses.
  • the terminal device may include multiple baseband processors to adapt to different network standards, the terminal device may include multiple central processors to enhance its processing capabilities, and various components of the terminal device may be connected through various buses.
  • the baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the function of processing communication protocols and communication data can be built into the processor, or can be stored in the memory in the form of a software program, and the processor executes the software program to implement the baseband processing function.
  • Memory is mainly used to store software programs and data.
  • the memory 1212 may exist independently and be connected to the processor 1211.
  • the memory 1212 can be integrated with the processor 1211, for example, integrated into a chip.
  • the memory 1212 can store the program code for executing the technical solution of the embodiment of the present application, and the execution is controlled by the processor 1211.
  • the various computer program codes executed can also be regarded as the driver of the processor 1211.
  • Figure 12 shows only one memory and one processor. In an actual terminal device, there may be multiple processors and multiple memories. Memory can also be called storage media or storage devices.
  • the memory may be a storage element on the same chip as the processor, that is, an on-chip storage element, or an independent storage element, which is not limited in the embodiments of the present application.
  • the transceiver 1213 may be used to support the reception or transmission of radio frequency signals between the communication device and the terminal, and the transceiver 1213 may be connected to the antenna 1215.
  • Transceiver 1213 includes a transmitter Tx and a receiver Rx.
  • one or more antennas 1215 can receive radio frequency signals
  • the receiver Rx of the transceiver 1213 is used to receive the radio frequency signals from the antennas and convert the radio frequency signals into digital baseband signals or digital intermediate frequency signals, and convert the digital baseband signals into digital baseband signals.
  • the signal or digital intermediate frequency signal is provided to the processor 1211, so that the processor 1211 performs further processing on the digital baseband signal or digital intermediate frequency signal, such as demodulation processing and decoding processing.
  • the transmitter Tx in the transceiver 1213 is also used to receive a modulated digital baseband signal or a digital intermediate frequency signal from the processor 1211, and convert the modulated digital baseband signal or digital intermediate frequency signal into a radio frequency signal, and pass it through a Or multiple antennas 1215 transmit the radio frequency signal.
  • the receiver Rx can selectively perform one or more levels of down-mixing processing and analog-to-digital conversion processing on the radio frequency signal to obtain a digital baseband signal or a digital intermediate frequency signal.
  • the sequence of the down-mixing processing and the analog-to-digital conversion processing is The order is adjustable.
  • the transmitter Tx can selectively perform one or more levels of upmixing processing and digital-to-analog conversion processing on the modulated digital baseband signal or digital intermediate frequency signal to obtain a radio frequency signal.
  • the upmixing processing and digital-to-analog conversion processing are The order is adjustable.
  • Digital baseband signals and digital intermediate frequency signals can be collectively referred to as digital signals.
  • the transceiver 1213 may also be called a transceiver unit, a transceiver, a transceiver device, etc.
  • the devices used to implement the receiving function in the transceiver unit can be regarded as the receiving unit
  • the devices used in the transceiver unit used to implement the transmitting function can be regarded as the transmitting unit, that is, the transceiver unit includes a receiving unit and a transmitting unit, and the receiving unit also It can be called a receiver, input port, receiving circuit, etc.
  • the sending unit can be called a transmitter, transmitter, or transmitting circuit, etc.
  • the communication device 1200 shown in Figure 12 can be used to implement the steps implemented by the network equipment in the foregoing method embodiments, and to achieve the corresponding technical effects of the network equipment.
  • the specific implementation of the communication device 1200 shown in Figure 12 is: Reference may be made to the descriptions in the foregoing method embodiments, and details will not be repeated here.
  • Embodiments of the present application also provide a computer-readable storage medium that stores one or more computer-executable instructions.
  • the processor executes the possible implementations of the terminal device in the foregoing embodiments. Methods.
  • Embodiments of the present application also provide a computer-readable storage medium that stores one or more computer-executable instructions.
  • the processor executes the possible implementations of the network device in the foregoing embodiments. Methods.
  • Embodiments of the present application also provide a computer program product (or computer program) that stores one or more computers.
  • the processor executes the method of possible implementation of the above terminal device.
  • Embodiments of the present application also provide a computer program product that stores one or more computers.
  • the processor executes the method of the possible implementation of the network device.
  • Embodiments of the present application also provide a chip system, which includes at least one processor and is used to support the communication device in implementing the functions involved in the possible implementation manners of the communication device.
  • the chip system further includes an interface circuit that provides program instructions and/or data to the at least one processor.
  • the chip system may also include a memory for storing necessary program instructions and data of the communication device.
  • the chip system may be composed of chips, or may include chips and other discrete devices, where the communication device may specifically be the terminal equipment in the foregoing method embodiment.
  • Embodiments of the present application also provide a chip system, which includes at least one processor and is used to support the communication device in implementing the functions involved in the possible implementation manners of the communication device.
  • the chip system further includes an interface circuit that provides program instructions and/or data to the at least one processor.
  • the chip system may also include a memory, which is used to store necessary program instructions and data for the communication device.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the communication device may specifically be the network device in the aforementioned method embodiment.
  • An embodiment of the present application also provides a communication system, which includes the terminal device and network device in any of the above embodiments.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented.
  • the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit.
  • the above integrated units can be implemented in the form of hardware or software functional units. If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program code. .

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Abstract

本申请提供了一种通信方法及通信装置，用于避免由于终端设备误更新导致寻呼错误的情况出现，以增强终端设备基于第一信息实现的寻呼提前指示(paging early indication，PEI)功能并降低该终端设备的功耗。在该方法中，在终端设备接收到第一消息且该终端设备与该网络设备之间的接入层(access stratum，AS)安全未激活的情况下，该终端设备确定不更新第一信息，该第一信息用于指示该终端设备最后使用的小区，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制(radio resource control，RRC)连接；该终端设备释放该RRC连接。

Description

一种通信方法及通信装置
本申请要求于2022年08月10日提交中国国家知识产权局，申请号为202210957685.3，发明名称为“一种通信方法及通信装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，尤其涉及一种通信方法及通信装置。
背景技术
在通信系统中，多个终端设备监听同一寻呼时机(paging occasion，PO)的情况下，如果某次寻呼仅针对多个终端设备中的部分终端设备，那么对于未被寻呼的终端设备来说，就存在不必要的寻呼接收进而产生不必要的功耗，这种情况被称为寻呼虚警(false alarm)。
目前，网络设备和终端设备可以引入寻呼提前指示(paging early indication，PEI)机制，以降低寻呼虚警的情况出现。其中，网络设备可以将同一PO中的多个终端设备分为多个组，并基于PEI机制指示该多个组中指定的某些组的终端设备需要在该PO中监听寻呼消息。
此外，在PEI机制的实现过程中，终端设备需要接收驻留的小区的广播消息，并基于自己的最后使用的小区(last used cell)确定是否被允许在该驻留小区内使用PEI机制，以降低不必要的功耗。
然而，对于终端设备而言，如何确定该终端设备最后使用的小区，是一个亟待解决的技术问题。
发明内容
本申请提供了一种通信方法及通信装置，用于避免由于终端设备误更新导致寻呼错误的情况出现，以增强终端设备基于第一信息实现的PEI功能并降低该终端设备的功耗。
本申请第一方面提供了一种通信方法，该方法由终端设备执行，或者，该方法由终端设备中的部分组件(例如处理器、芯片或芯片系统等)执行，或者该方法还可以由能实现全部或部分终端设备功能的逻辑模块或软件实现。在第一方面及其可能的实现方式中，以该通信方法由终端设备执行为例进行描述。在该方法中，在终端设备接收到第一消息且该终端设备与该网络设备之间的接入层(access stratum，AS)安全未激活的情况下，该终端设备确定不更新第一信息，该第一信息用于指示该终端设备最后使用的小区，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制(radio resource control，RRC)连接；该终端设备释放该RRC连接。
基于上述技术方案，终端设备可以维护用于指示该终端设备最后使用的小区的第一信息。其中，终端设备在接收指示释放该终端设备与网络设备之间的RRC连接的第一消息并释放该RRC连接的场景中，该终端设备与该网络设备之间的接入层安全未激活的情况下，该终端设备确定不更新该第一信息。其中，在该接入层安全未激活的情况下，终端设备可以确定无法基于接入层安全机制与该网络设备之间进行通信。从而，终端设备确定不更新该第一信息的方式使得该终端设备不会基于发送该第一消息的小区(该小区位于该网络设备对应的一个或多个小区中)更新第一信息，可以避免由于终端设备误更新导致寻呼错误的情况出现，以增强终端设备基于该第一信息实现的PEI功能并降低该终端设备的功耗。
此外，终端设备与该网络设备之间的接入层安全未激活的情况下，有可能是由于不同网络设备(接入网设备和核心网设备)之间的连接未成功建立而导致的，此时网络设备无法将该网络设备维护的该终端设备的最近使用的小区信息进行更新。为此，在上述技术方案中，终端设备确定不更新第一信息，可以使得终端设备和网络设备对该终端设备的最近使用的小区信息的维护是一致的(或称对齐的)，进而使得终端设备和网络设备之间能够正常使用PEI机制进行通信。
此外，终端设备与该网络设备之间的接入层安全未激活的情况下，有可能是由于网络设备是异常网络设备(例如伪基站)造成的。为此，在上述技术方案中，终端设备确定不更新第一信息，可以避免终端设备误更新成错误的小区，进而使得终端设备和网络设备之间能够正常使用PEI机制进行通信。
应理解，该终端设备释放该RRC连接可以理解为该终端设备退出RRC连接态，该终端设备可以进入除了RRC连接态之外的其他状态，例如空闲态(idle态)，非激活态(inactive态)等。
本申请中，用于指示释放该终端设备与网络设备之间的RRC连接的第一消息的消息名称可以为RRC释放(RRCReleace)消息，该名称为目前通信系统中的名称，在未来通信系统中，用于指示释放该终端设备与网络设备之间的RRC连接的消息的名称可能随着通信系统的演进而改变。
此外，本申请中，终端设备的最后使用的小区(last used cell)可以称为终端设备最近接入过的小区，终端设备最近访问过的小区，终端设备被释放连接的小区，向终端设备发送该第一消息的小区，终端设备最后被服务的小区等。
可选地，终端设备确定不更新第一信息，可以表述为终端设备不更新第一信息，也可以表述为终端设备无需识别该第一消息中是否携带指示更新(或不更新)第一信息的指示信息而确定不更新该第一信息，也可以表述为终端设备不执行更新第一信息，也可以表述为终端设备维持第一信息不变，也可以表述为终端设备维护的第一信息不变等。
在第一方面的一种可能的实现方式中，该第一消息包含第一指示信息，该第一指示信息用于指示不更新该第一信息；该方法还包括：在该终端设备与该网络设备之间的接入层安全未激活的情况下，该终端设备忽略该第一指示信息。
基于上述技术方案，在该终端设备与该网络设备之间的接入层安全未激活的情况下，该终端设备可以确定无法基于接入层安全机制与该网络设备之间进行通信，为此，该终端设备可以忽略该第一消息携带的第一指示信息而确定不更新该第一信息。换言之，该终端设备可以无需识别该第一消息中是否携带指示更新(或不更新)第一信息的指示信息而确定不更新该第一信息，以避免由于终端设备误更新导致寻呼错误的情况出现。
本申请中，该第一指示信息的名称可以为不更新最后使用的小区(noLastCellUpdate)信元/字段/域/参数，该名称为目前通信系统中的名称，在未来通信系统中，该第一指示信息的名称可能随着通信系统的演进而改变。
在第一方面的一种可能的实现方式中，该第一消息包括第二指示信息，该第二指示信息用于指示接入网络的等待时间(wait time)；该方法还包括：该终端设备忽略该第一消息中除该第二指示信息之外的至少一个信息，该至少一个信息包括第一指示信息，该第一指示信息用于指示不更新该第一信息。
基于上述技术方案，终端设备接收的第一消息可以包括用于指示接入网络的等待时间的第二指示信息，以便于该终端设备后续可以基于该第二指示信息重新建立与网络设备之间的连接。此外，在该终端设备与该网络设备之间的接入层安全未激活的情况下，该终端设备可以确定无法基于接入层安全机制与该网络设备之间进行通信，为此，该终端设备可以忽略该第一消息中除该第二指示信息之外的至少一个信息。
可选地，该终端设备忽略该第一消息中除该第二指示信息之外的至少一个信息可以包括该终端设备忽略该第一消息中除该第二指示信息之外的其它信息。
可选地，第二指示信息还可以表述为其它方式，包括：第二指示信息用于指示定时器T302的定时时长(其中，T302指示终端设备重新建立或恢复RRC连接的等待时间)，第二指示信息用于指示终端设备的接入尝试(access attempt)的等待时间，第二指示信息用于指示控制终端设备建立RRC连接的等待时间等。
本申请中，该第二指示信息的名称可以为等待时间(waitTime)信元/字段/域/参数，该名称为目前通信系统中的名称，在未来通信系统中，该第而指示信息的名称可能随着通信系统的演进而改变。
在第一方面的一种可能的实现方式中，该第一信息包括该终端设备最后使用的小区信息。
可选地，该第一信息可以包括该终端设备最后使用的小区的标识，例如该标识可以为小区全球标识(cell global identifier，CGI)，物理小区标识(physical cell identifier，PCI)等。
在第一方面的一种可能的实现方式中，在满足以下任一项时，该终端设备确定该终端设备与该网络设备之间的接入层安全未激活，包括：该终端设备确定未接收到安全模式命令消息；该终端设备接收该安全模式命令消息之后，该终端设备确定基于该安全模式命令消息推演密钥的过程失败；或，该终端设备接收该安全模式命令消息之后，该终端设备确定该安全模式命令消息对应的完整性保护校验未通过。
基于上述技术方案，终端设备可以通过上述多种方式确定该终端设备与该网络设备之间的接入层安 全未激活，以提升方案实现的灵活性。
在第一方面的一种可能的实现方式中，该方法还包括：该终端设备发送第一能力信息，该第一能力信息指示该终端设备支持PEI。
基于上述技术方案，终端设备可以向网络设备发送指示该终端设备支持PEI的第一能力信息，以便于该网络设备基于该第一能力信息明确该终端设备支持PEI并基于PEI机制与该终端设备通信。
在第一方面的一种可能的实现方式中，该方法还包括：该终端设备接收第三指示信息，该第三指示信息指示该网络设备支持PEI。
基于上述技术方案，网络设备可以向终端设备发送指示该网络设备支持PEI的第三指示信息，以便于该终端设备基于该第三指示信息明确该网络设备支持PEI并基于PEI机制与该网络设备通信。
可选地，除了上述第一能力信息和第三指示信息交互的实现方式，终端设备和网络设备还可以通过其它实现方式获知对端的能力信息。例如，通过其它设备之间的交互的实现方式，该其他设备可以为核心网设备、侧行链路(sidelink)设备，服务器等。又如，通过协议/标准预配置的实现方式。
本申请第二方面提供了一种通信方法，该方法由网络设备执行，或者，该方法由网络设备中的部分组件(例如处理器、芯片或芯片系统等)执行，或者该方法还可以由能实现全部或部分网络设备功能的逻辑模块或软件实现。在第二方面及其可能的实现方式中，以该通信方法由网络设备执行为例进行描述。在该方法中，在网络设备已发送第一消息且终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备确定不更新第二信息，该第二信息用于指示该终端设备访问过的一个或多个小区，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接；该网络设备释放该RRC连接。
基于上述技术方案，网络设备可以维护用于指示该终端设备访问过的一个或多个小区的第二信息。其中，网络设备在发送指示释放该终端设备与网络设备之间的RRC连接的第一消息并释放该RRC连接的场景中，该终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备确定不更新该第二信息。其中，在该接入层安全未激活的情况下，网络设备可以确定无法基于接入层安全机制与该终端设备之间进行通信。从而，网络设备确定不更新该第二信息的方式使得该网络设备不会基于发送该第一消息的小区(该小区位于该网络设备对应的一个或多个小区中)更新第二信息，可以避免由于网络设备误更新导致寻呼错误的情况出现，以增强网络设备基于该第二信息实现的PEI功能并降低该网络设备的功耗。
此外，终端设备与该网络设备之间的接入层安全未激活的情况下，有可能是由于不同网络设备(接入网设备和核心网设备)之间的连接未成功建立而导致的，此时网络设备无法将该网络设备维护的该终端设备的最近使用的小区信息进行更新。为此，在上述技术方案中，网络设备确定不更新第二信息，可以使得终端设备和网络设备对该终端设备的最近使用的小区信息的维护是一致的(或称对齐的)，进而使得终端设备和网络设备之间能够正常使用PEI机制进行通信。
此外，终端设备与该网络设备之间的接入层安全未激活的情况下，有可能是由于网络设备是异常网络设备(例如伪基站)造成的。为此，在上述技术方案中，网络设备确定不更新第二信息，可以避免网络设备误更新成错误的小区，进而使得终端设备和网络设备之间能够正常使用PEI机制进行通信。
可选地，网络设备确定不更新第二信息，可以表述为网络设备不更新第二信息，也可以表述为网络设备无需识别该第一消息中是否携带指示更新(或不更新)第一信息的指示信息而确定不更新该第二信息，也可以表述为网络设备不执行更新第二信息，也可以表述为网络设备维持第二信息不变，也可以表述为网络设备维护的第二信息不变等。
应理解，本申请中，第二信息用于指示该终端设备访问过的一个或多个小区，该第二信息还可以用于指示其它信息，例如该终端设备未访问过的一个或多个小区，或者是其他信息，此处不做限定。
在第二方面的一种可能的实现方式中，该第一消息包含第一指示信息，该第一指示信息用于指示不更新第一信息，该第一信息用于指示该终端设备最后使用的小区；该方法还包括：在该终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备确定该终端设备忽略该第一指示信息。
基于上述技术方案，在该终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备可以确定无法基于接入层安全机制与该终端设备之间进行通信，为此，该网络设备确定该终端设备忽略该第一指示信息，以便于网络设备与终端设备对齐两者对该第一信息的理解，以期减少通信出错的可能性。
在第二方面的一种可能的实现方式中，该第一消息包括第二指示信息，该第二指示信息用于指示接入网络的等待时间；该方法还包括：在该终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备确定该终端设备忽略该第一消息中除该第二指示信息之外的至少一个信息，该至少一个信息包括第一指示信息，该第一指示信息用于指示不更新第一信息，该第一信息用于指示该终端设备最后使用的小区。
基于上述技术方案，网络设备发送的第一消息可以包括用于指示接入网络的等待时间的第二指示信息，以便于该终端设备后续可以基于该第二指示信息重新建立与网络设备之间的连接。此外，在该终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备可以确定无法基于接入层安全机制与该终端设备之间进行通信，为此，该网络设备可以确定该终端设备忽略该第一消息中除该第二指示信息之外的至少一个信息，以便于网络设备与终端设备对齐两者对该第一消息的理解，以期减少通信出错的可能性。
可选地，第二指示信息还可以表述为其它方式，包括：第二指示信息用于指示定时器T302的定时时长(其中，T302指示终端设备重新建立或恢复RRC连接的等待时间)，第二指示信息用于指示终端设备的接入尝试(access attempt)的等待时间，第二指示信息用于指示控制终端设备建立RRC连接的等待时间等。
在第二方面的一种可能的实现方式中，该方法还包括：在该终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备确定该终端设备不更新第一信息，该第一信息用于指示该终端设备最后使用的小区。
基于上述技术方案，在该终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备可以确定无法基于接入层安全机制与该终端设备之间进行通信，为此，该网络设备确定该终端设备不更新第一信息，以便于网络设备与终端设备对齐两者对该第一信息的理解，以期减少通信出错的可能性。
在第二方面的一种可能的实现方式中，该第一信息包括该终端设备最后使用的小区信息。
可选地，该第一信息可以包括该终端设备最后使用的小区的标识，例如该标识可以为CGI，PCI等。
在第二方面的一种可能的实现方式中，该第二信息包括该终端设备访问过的一个或多个小区的标识。
可选地，该终端设备访问过的一个或多个小区的标识可以为CGI，PCI等。
在第二方面的一种可能的实现方式中，该网络设备向核心网设备发送该第二信息。
基于上述技术方案，该网络设备还可以向核心网设备发送用于指示该终端设备访问过的一个或多个小区的第二信息，以便于该核心网设备与该网络设备对齐两者对该第二信息的理解，以期减少通信出错的可能性。
在第二方面的一种可能的实现方式中，该方法还包括：该网络设备接收第一能力信息，该第一能力信息指示该终端设备支持PEI。
基于上述技术方案，终端设备可以向网络设备发送指示该终端设备支持PEI的第一能力信息，以便于该网络设备基于该第一能力信息明确该终端设备支持PEI并基于PEI机制与该终端设备通信。
在第二方面的一种可能的实现方式中，该方法还包括：该网络设备发送第三指示信息，该第三指示信息指示该网络设备支持PEI。
基于上述技术方案，网络设备可以向终端设备发送指示该网络设备支持PEI的第三指示信息，以便于该终端设备基于该第三指示信息明确该网络设备支持PEI并基于PEI机制与该网络设备通信。
可选地，除了上述第一能力信息和第三指示信息交互的实现方式，终端设备和网络设备还可以通过其它实现方式获知对端的能力信息。例如，通过其它设备之间的交互的实现方式，该其他设备可以为核心网设备、侧行链路(sidelink)设备，服务器等。又如，通过协议/标准预配置的实现方式。
本申请第三方面提供了一种通信方法该方法由终端设备执行，或者，该方法由终端设备中的部分组件(例如处理器、芯片或芯片系统等)执行，或者该方法还可以由能实现全部或部分终端设备功能的逻辑模块或软件实现。在第三方面及其可能的实现方式中，以该通信方法由终端设备执行为例进行描述。 在该方法中，在终端设备接收到第一消息且该终端设备与该网络设备之间的接入层安全未激活的情况下，该终端设备确定不忽略该第一消息中的第一指示信息，或者，该终端设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息；其中，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接，该第一指示信息用于指示不更新第一信息，该第一信息用于指示该终端设备最后使用的小区，该第二指示信息用于指示接入网络的等待时间；该终端设备释放该RRC连接。
基于上述技术方案，终端设备可以维护用于指示该终端设备最后使用的小区的第一信息。其中，终端设备在接收指示释放该终端设备与网络设备之间的RRC连接的第一消息并释放该RRC连接的场景中，该终端设备与该网络设备之间的接入层安全未激活的情况下，该终端设备确定不忽略该第一消息中的第一指示信息，或者，该终端设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息。其中，在该接入层安全未激活的情况下，终端设备可以确定无法基于接入层安全机制与该网络设备之间进行通信。从而，该终端设备确定不忽略该第一消息中的第一指示信息(或者，该终端设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息)的方式，使得该终端设备不会基于发送该第一消息的小区(该小区位于该网络设备对应的一个或多个小区中)更新第一信息，可以避免由于终端设备误更新导致寻呼错误的情况出现，以增强终端设备基于该第一信息实现的PEI功能并降低该终端设备的功耗。
此外，终端设备确定不忽略该第一消息中的第一指示信息(或者，该终端设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息)的方式，还可以使得终端设备和网络设备之间对齐两者对该第一指示信息的理解，以期减少通信出错的可能性。
可选地，该终端设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息可以包括：该终端设备忽略该第一消息中除第一指示信息和第二指示信息之外的其它信息。
在第三方面的一种可能的实现方式中，该方法还包括：该终端设备根据第一指示信息确定不更新该第一信息。
基于上述技术方案，该终端设备确定不忽略该第一指示信息的过程可以包括该终端设备根据第一指示信息确定不更新该第一信息，以便于该终端设备基于网络设备发送的第一指示信息确定不更新该第一信息，使得终端设备和网络设备之间对齐两者对该第一指示信息的理解，以期减少通信出错的可能性。
在第三方面的一种可能的实现方式中，该第一信息包括该终端设备最后使用的小区信息。
可选地，该第一信息可以包括该终端设备最后使用的小区的标识，例如该标识可以为CGI，PCI等。
在第三方面的一种可能的实现方式中，在满足以下任一项时，该终端设备确定该终端设备与该网络设备之间的接入层安全未激活，包括：该终端设备确定未接收到安全模式命令消息；该终端设备接收该安全模式命令消息之后，该终端设备确定基于该安全模式命令消息推演密钥的过程失败；或，该终端设备接收该安全模式命令消息之后，该终端设备确定该安全模式命令消息对应的完整性保护校验未通过。
基于上述技术方案，终端设备可以通过上述多种方式确定该终端设备与该网络设备之间的接入层安全未激活，以提升方案实现的灵活性。
在第三方面的一种可能的实现方式中，该方法还包括：该终端设备发送第一能力信息，该第一能力信息指示该终端设备支持寻呼提前指示PEI。
基于上述技术方案，终端设备可以向网络设备发送指示该终端设备支持PEI的第一能力信息，以便于该网络设备基于该第一能力信息明确该终端设备支持PEI并基于PEI机制与该终端设备通信。
在第三方面的一种可能的实现方式中，该方法还包括：该终端设备接收第三指示信息，该第三指示信息指示该网络设备支持PEI。
基于上述技术方案，网络设备可以向终端设备发送指示该网络设备支持PEI的第三指示信息，以便于该终端设备基于该第三指示信息明确该网络设备支持PEI并基于PEI机制与该网络设备通信。
可选地，除了上述第一能力信息和第三指示信息交互的实现方式，终端设备和网络设备还可以通过其它实现方式获知对端的能力信息。例如，通过其它设备之间的交互的实现方式，该其他设备可以为核心网设备、侧行链路(sidelink)设备，服务器等。又如，通过协议/标准预配置的实现方式。
本申请第四方面提供了一种通信方法，该方法由网络设备执行，或者，该方法由网络设备中的部分组件(例如处理器、芯片或芯片系统等)执行，或者该方法还可以由能实现全部或部分网络设备功能的逻辑模块或软件实现。在第四方面及其可能的实现方式中，以该通信方法由网络设备执行为例进行描述。在该方法中，在网络设备已发送第一消息且终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备确定不忽略该第一消息中的第一指示信息，或者，该网络设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息；其中，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接，该第一指示信息用于指示不更新第一信息，该第一信息用于指示该终端设备最后使用的小区，该第二指示信息用于指示接入网络的等待时间；该网络设备释放该RRC连接。
基于上述技术方案，网络设备在发送指示释放该终端设备与网络设备之间的RRC连接的第一消息并释放该RRC连接的场景中，该终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备确定不忽略该第一消息中的第一指示信息，或者，该网络设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息。其中，在该接入层安全未激活的情况下，网络设备可以确定无法基于接入层安全机制与该终端设备之间进行通信。从而，该网络设备确定不忽略该第一消息中的第一指示信息(或者，该网络设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息)的方式，使得该网络设备明确该终端设备不会基于发送该第一消息的小区(该小区位于该网络设备对应的一个或多个小区中)更新第一信息，可以避免由于终端设备误更新导致寻呼错误的情况出现，以增强终端设备基于该第一信息实现的PEI功能并降低该终端设备的功耗。
此外，网络设备确定不忽略该第一消息中的第一指示信息(或者，该网络设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息)的方式，还可以使得终端设备和网络设备之间对齐两者对该第一指示信息的理解，以期减少通信出错的可能性。
可选地，该网络设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息可以包括：该网络设备忽略该第一消息中除第一指示信息和第二指示信息之外的其它信息。
在第四方面的一种可能的实现方式中，该方法还包括：该网络设备根据该第一指示信息确定不更新第二信息，该第二信息用于该终端设备访问过的一个或多个小区。
基于上述技术方案，该网络设备可以根据该第一指示信息确定不更新用于该终端设备访问过的一个或多个小区的第二信息，以便于终端设备和网络设备之间对齐两者对该第一指示信息的理解，以期减少通信出错的可能性。
在第四方面的一种可能的实现方式中，该第二信息包括该终端设备访问过的一个或多个小区的标识。
可选地，该终端设备访问过的一个或多个小区的标识可以为CGI，PCI等。
在第四方面的一种可能的实现方式中，该第一信息包括该终端设备最后使用的小区信息。
可选地，该第一信息可以包括该终端设备最后使用的小区的标识，例如该标识可以为CGI，PCI等。
在第四方面的一种可能的实现方式中，该方法还包括：在该终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备确定该终端设备不忽略该第一消息中的第一指示信息，或者，该网络设备确定该终端设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息。
基于上述技术方案，在该终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备可以确定无法基于接入层安全机制与该终端设备之间进行通信，为此，该网络设备确定该终端设备不忽略该第一消息中的第一指示信息(或者，该网络设备确定该终端设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息)，以便于网络设备与终端设备对齐两者对该第一信息的理解，以期减少通信出错的可能性。
在第四方面的一种可能的实现方式中，该方法还包括：该网络设备向核心网设备发送第二信息。
基于上述技术方案，该网络设备还可以向核心网设备发送用于指示该终端设备访问过的一个或多个小区的第二信息，以便于该核心网设备与该网络设备对齐两者对该第二信息的理解，以期减少通信出错的可能性。
在第四方面的一种可能的实现方式中，该方法还包括：该网络设备接收第一能力信息，该第一能力信息指示该终端设备支持PEI。
基于上述技术方案，终端设备可以向网络设备发送指示该终端设备支持PEI的第一能力信息，以便于该网络设备基于该第一能力信息明确该终端设备支持PEI并基于PEI机制与该终端设备通信。
在第四方面的一种可能的实现方式中，该方法还包括：该网络设备发送第三指示信息，该第三指示信息指示该网络设备支持PEI。
基于上述技术方案，网络设备可以向终端设备发送指示该网络设备支持PEI的第三指示信息，以便于该终端设备基于该第三指示信息明确该网络设备支持PEI并基于PEI机制与该网络设备通信。
可选地，除了上述第一能力信息和第三指示信息交互的实现方式，终端设备和网络设备还可以通过其它实现方式获知对端的能力信息。例如，通过其它设备之间的交互的实现方式，该其他设备可以为核心网设备、侧行链路(sidelink)设备，服务器等。又如，通过协议/标准预配置的实现方式。
本申请第五方面提供了一种通信方法，该方法由终端设备执行，或者，该方法由终端设备中的部分组件(例如处理器、芯片或芯片系统等)执行，或者该方法还可以由能实现全部或部分终端设备功能的逻辑模块或软件实现。在第五方面及其可能的实现方式中，以该通信方法由终端设备执行为例进行描述。在该方法中，在终端设备接收到第一消息且该终端设备与该网络设备之间的接入层安全未激活的情况下，该终端设备根据该第一消息处理第一信息，该第一信息用于指示该终端设备最后使用的小区信息，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接；该终端设备释放该RRC连接。
基于上述技术方案，终端设备可以维护用于指示该终端设备最后使用的小区的第一信息。其中，终端设备在接收指示释放该终端设备与网络设备之间的RRC连接的第一消息并释放该RRC连接的场景中，该终端设备根据该第一消息处理第一信息。其中，在该接入层安全未激活的情况下，终端设备可以确定无法基于接入层安全机制与该网络设备之间进行通信。从而，该终端设备根据该第一消息处理第一信息的方式，使得终端设备和网络设备之间对齐两者对该第一消息的理解，以期减少通信出错的可能性。
在第五方面的一种可能的实现方式中，该终端设备根据该第一消息处理第一信息包括：在该第一消息包括第一指示信息的情况下，该终端设备确定不更新该第一信息，该第一指示信息用于指示不更新该第一信息。
基于上述技术方案，在该第一消息包括指示不更新该第一信息的第一指示信息的情况下，该终端设备确定不更新该第一信息，使得该终端设备基于网络设备的指示执行相应的操作，以期减少通信出错的可能性。
在第五方面的一种可能的实现方式中，该终端设备根据该第一消息处理第一信息包括：在该第一消息不包括第一指示信息的情况下，该终端设备基于该第一消息对应的小区更新该第一信息，该第一指示信息用于指示不更新该第一信息。
基于上述技术方案，在该第一消息不包括第一指示信息的情况下，该终端设备基于该第一消息对应的小区更新该第一信息，使得该终端设备基于网络设备的指示执行相应的操作，以期减少通信出错的可能性。
应理解，该终端设备基于该第一消息对应的小区更新该第一信息的过程包括：该终端设备基于发送该第一消息的小区的小区标识更新该第一信息，或者，该终端设备基于该第一消息携带的小区标识更新该第一信息，此处不做限定。
在第五方面的一种可能的实现方式中，该第一信息包括该终端设备最后使用的小区信息。
可选地，该第一信息可以包括该终端设备最后使用的小区的标识，例如该标识可以为CGI，PCI等。
在第五方面的一种可能的实现方式中，在满足以下任一项时，该终端设备确定该终端设备与该网络设备之间的接入层安全未激活，包括：该终端设备确定未接收到安全模式命令消息；该终端设备接收该安全模式命令消息之后，该终端设备确定基于该安全模式命令消息推演密钥的过程失败；或，该终端设备接收该安全模式命令消息之后，该终端设备确定该安全模式命令消息对应的完整性保护校验未通过。
基于上述技术方案，终端设备可以通过上述多种方式确定该终端设备与该网络设备之间的接入层安全未激活，以提升方案实现的灵活性。
在第五方面的一种可能的实现方式中，该方法还包括：该终端设备发送第一能力信息，该第一能力 信息指示该终端设备支持PEI。
基于上述技术方案，终端设备可以向网络设备发送指示该终端设备支持PEI的第一能力信息，以便于该网络设备基于该第一能力信息明确该终端设备支持PEI并基于PEI机制与该终端设备通信。
在第五方面的一种可能的实现方式中，该方法还包括：该终端设备接收第三指示信息，该第三指示信息指示该网络设备支持PEI。
基于上述技术方案，网络设备可以向终端设备发送指示该网络设备支持PEI的第三指示信息，以便于该终端设备基于该第三指示信息明确该网络设备支持PEI并基于PEI机制与该网络设备通信。
可选地，除了上述第一能力信息和第三指示信息交互的实现方式，终端设备和网络设备还可以通过其它实现方式获知对端的能力信息。例如，通过其它设备之间的交互的实现方式，该其他设备可以为核心网设备、侧行链路(sidelink)设备，服务器等。又如，通过协议/标准预配置的实现方式。
本申请第六方面提供了一种通信方法，该方法由网络设备执行，或者，该方法由网络设备中的部分组件(例如处理器、芯片或芯片系统等)执行，或者该方法还可以由能实现全部或部分网络设备功能的逻辑模块或软件实现。在第六方面及其可能的实现方式中，以该通信方法由网络设备执行为例进行描述。在该方法中，在网络设备已发送第一消息且终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备根据该第一消息处理第二信息，该第二信息用于指示该终端设备访问过的一个或多个小区，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接；该网络设备释放该RRC连接。
基于上述技术方案，网络设备可以维护用于指示该终端设备访问过的一个或多个小区的第二信息。其中，网络设备在发送指示释放该终端设备与网络设备之间的RRC连接的第一消息并释放该RRC连接的场景中，该网络设备根据该第一消息处理第二信息。其中，在该接入层安全未激活的情况下，网络设备可以确定无法基于接入层安全机制与该网络设备之间进行通信。从而，该网络设备根据该第一消息处理第一信息的方式，使得终端设备和网络设备之间对齐两者对该第一消息的理解，以期减少通信出错的可能性。
在第六方面的一种可能的实现方式中，该网络设备根据该第一消息处理第二信息包括：在该第一消息包括第一指示信息的情况下，该网络设备确定不更新该第二信息，该第一指示信息用于指示不更新第一信息，该第一信息用于指示该终端设备最后使用的小区信息。
基于上述技术方案，在该第一消息包括指示不更新该第一信息的第一指示信息的情况下，该网络设备确定不更新该第二信息，使得后续终端设备基于网络设备的指示执行相应的操作，以期减少通信出错的可能性。
在第六方面的一种可能的实现方式中，该终端设备根据该第一消息处理第一信息包括：在该第一消息不包括第一指示信息的情况下，该终端设备基于该第一消息对应的小区更新该第二信息，该第一指示信息用于指示不更新该第一信息，该第一信息用于指示该终端设备最后使用的小区信息。
基于上述技术方案，在该第一消息不包括第一指示信息的情况下，该网络设备基于该第一消息对应的小区更新该第二信息，使得后续终端设备基于网络设备的指示执行相应的操作，以期减少通信出错的可能性。
应理解，该终端设备基于该第一消息对应的小区更新该第一信息的过程包括：该终端设备基于发送该第一消息的小区的小区标识更新该第一信息，或者，该终端设备基于该第一消息携带的小区标识更新该第一信息，此处不做限定。例如，在上述实施例中，终端设备基于发送该第一消息的小区的小区标识更新该第一信息，换言之，终端设备将第一信息所指示的最后使用的小区信息更新为发送该第一消息的小区的小区标识。
在第六方面的一种可能的实现方式中，该第一信息包括该终端设备最后使用的小区信息。
可选地，该第一信息可以包括该终端设备最后使用的小区的标识，例如该标识可以为CGI，PCI等。
在第六方面的一种可能的实现方式中，该第二信息包括该终端设备访问过的一个或多个小区的标识。
可选地，该终端设备访问过的一个或多个小区的标识可以为CGI，PCI等。
在第六方面的一种可能的实现方式中，该方法还包括：该网络设备向核心网设备发送第二信息。
基于上述技术方案，该网络设备还可以向核心网设备发送用于指示该终端设备访问过的一个或多个小区的第二信息，以便于该核心网设备与该网络设备对齐两者对该第二信息的理解，以期减少通信出错的可能性。
在第六方面的一种可能的实现方式中，该方法还包括：该网络设备根据该第一消息确定该终端设备是否更新该第一信息。
基于上述技术方案，该网络设备还可以根据该第一消息确定该终端设备是否更新该第一信息，以便于该网络设备明确该终端设备的行为，以期避免通信出错。
在第六方面的一种可能的实现方式中，该方法还包括：该网络设备接收第一能力信息，该第一能力信息指示该终端设备支持PEI。
基于上述技术方案，终端设备可以向网络设备发送指示该终端设备支持PEI的第一能力信息，以便于该网络设备基于该第一能力信息明确该终端设备支持PEI并基于PEI机制与该终端设备通信。
在第六方面的一种可能的实现方式中，该方法还包括：该网络设备发送第三指示信息，该第三指示信息指示该网络设备支持PEI。
基于上述技术方案，网络设备可以向终端设备发送指示该网络设备支持PEI的第三指示信息，以便于该终端设备基于该第三指示信息明确该网络设备支持PEI并基于PEI机制与该网络设备通信。
可选地，除了上述第一能力信息和第三指示信息交互的实现方式，终端设备和网络设备还可以通过其它实现方式获知对端的能力信息。例如，通过其它设备之间的交互的实现方式，该其他设备可以为核心网设备、侧行链路(sidelink)设备，服务器等。又如，通过协议/标准预配置的实现方式。
本申请第七方面提供了一种通信装置，该装置可以实现上述第一方面或第一方面任一种可能的实现方式中的方法。该装置包括用于执行上述方法的相应的单元或模块。该装置包括的单元或模块可以通过软件和/或硬件方式实现。例如，该装置可以为终端设备，或者，该装置可以为终端设备中的组件(例如处理器、芯片或芯片系统等)，或者该装置还可以为能实现全部或部分终端设备功能的逻辑模块或软件。在第七方面及其可能的实现方式中，以该通信装置为终端设备为例进行描述。
其中，该装置包括处理单元和收发单元；在该收发单元接收到第一消息且该终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元确定不更新第一信息，该第一信息用于指示该终端设备最后使用的小区，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接；该处理单元释放该RRC连接。
在第七方面的一种可能的实现方式中，该第一消息包含第一指示信息，该第一指示信息用于指示不更新该第一信息；在该终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元还用于忽略该第一指示信息。
在第七方面的一种可能的实现方式中，该第一消息包括第二指示信息，该第二指示信息用于指示接入网络的等待时间；该处理单元还用于忽略该第一消息中除该第二指示信息之外的至少一个信息，该至少一个信息包括第一指示信息，该第一指示信息用于指示不更新该第一信息。
在第七方面的一种可能的实现方式中，该第一信息包括该终端设备最后使用的小区信息。
在第七方面的一种可能的实现方式中，在满足以下任一项时，该处理单元确定该终端设备与该网络设备之间的接入层安全未激活，包括：该处理单元确定未接收到安全模式命令消息；在该收发单元接收该安全模式命令消息之后，该处理单元确定基于该安全模式命令消息推演密钥的过程失败；或，在该收发单元接收该安全模式命令消息之后，该处理单元确定该安全模式命令消息对应的完整性保护校验未通过。
在第七方面的一种可能的实现方式中，该收发单元还用于发送第一能力信息，该第一能力信息指示该终端设备支持寻呼提前指示PEI。
在第七方面的一种可能的实现方式中，该收发单元还用于接收第三指示信息，该第三指示信息指示该网络设备支持PEI。
本申请实施例第七方面中，通信装置的组成模块还可以用于执行第一方面的各个可能实现方式中所执行的步骤，并实现相应的技术效果，具体均可以参阅第一方面，此处不再赘述。
本申请第八方面提供了一种通信装置，该装置可以实现上述第二方面或第二方面任一种可能的实现方式中的方法。该装置包括用于执行上述方法的相应的单元或模块。该装置包括的单元或模块可以通过软件和/或硬件方式实现。例如，该装置可以为网络设备，或者，该装置可以为网络设备中的组件(例如处理器、芯片或芯片系统等)，或者该装置还可以为能实现全部或部分网络设备功能的逻辑模块或软件。在第八方面及其可能的实现方式中，以该通信装置为网络设备为例进行描述。
其中，该装置包括处理单元和收发单元；在该收发单元已发送第一消息且终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元确定不更新第二信息，该第二信息用于指示该终端设备访问过的一个或多个小区，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接；该处理单元释放该RRC连接。
在第八方面的一种可能的实现方式中，该第一消息包含第一指示信息，该第一指示信息用于指示不更新第一信息，该第一信息用于指示该终端设备最后使用的小区；在该终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元确定该终端设备忽略该第一指示信息。
在第八方面的一种可能的实现方式中，该第一消息包括第二指示信息，该第二指示信息用于指示接入网络的等待时间；在该终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元确定该终端设备忽略该第一消息中除该第二指示信息之外的至少一个信息，该至少一个信息包括第一指示信息，该第一指示信息用于指示不更新第一信息，该第一信息用于指示该终端设备最后使用的小区。
在第八方面的一种可能的实现方式中，在该终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元确定该终端设备不更新第一信息，该第一信息用于指示该终端设备最后使用的小区。
在第八方面的一种可能的实现方式中，该第一信息包括该终端设备最后使用的小区信息。
在第八方面的一种可能的实现方式中，该第二信息包括该终端设备访问过的一个或多个小区的标识。
在第八方面的一种可能的实现方式中，该收发单元还用于向核心网设备发送该第二信息。
在第八方面的一种可能的实现方式中，该收发单元还用于发送第三指示信息，该第三指示信息指示该网络设备支持PEI。
本申请实施例第八方面中，通信装置的组成模块还可以用于执行第二方面的各个可能实现方式中所执行的步骤，并实现相应的技术效果，具体均可以参阅第二方面，此处不再赘述。
本申请第九方面提供了一种通信装置，该装置可以实现上述第三方面或第三方面任一种可能的实现方式中的方法。该装置包括用于执行上述方法的相应的单元或模块。该装置包括的单元或模块可以通过软件和/或硬件方式实现。例如，该装置可以为终端设备，或者，该装置可以为终端设备中的组件(例如处理器、芯片或芯片系统等)，或者该装置还可以为能实现全部或部分终端设备功能的逻辑模块或软件。在第九方面及其可能的实现方式中，以该通信装置为终端设备为例进行描述。
其中，该装置包括处理单元和收发单元；在该收发单元接收到第一消息且该终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元确定不忽略该第一消息中的第一指示信息，或者，该处理单元忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息；其中，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接，该第一指示信息用于指示不更新第一信息，该第一信息用于指示该终端设备最后使用的小区，该第二指示信息用于指示接入网络的等待时间；该处理单元释放该RRC连接。
在第九方面的一种可能的实现方式中，该处理单元还用于根据第一指示信息确定不更新该第一信息。
在第九方面的一种可能的实现方式中，该第一信息包括该终端设备最后使用的小区信息。
在第九方面的一种可能的实现方式中，在满足以下任一项时，该处理单元确定该终端设备与该网络设备之间的接入层安全未激活，包括：该处理单元确定未接收到安全模式命令消息；在该收发单元接收该安全模式命令消息之后，该处理单元确定基于该安全模式命令消息推演密钥的过程失败；或，在该收 发单元接收该安全模式命令消息之后，该处理单元确定该安全模式命令消息对应的完整性保护校验未通过。
在第九方面的一种可能的实现方式中，该收发单元还用于发送第一能力信息，该第一能力信息指示该终端设备支持寻呼提前指示PEI。
在第九方面的一种可能的实现方式中，该收发单元还用于接收第三指示信息，该第三指示信息指示该网络设备支持PEI。
本申请实施例第九方面中，通信装置的组成模块还可以用于执行第三方面的各个可能实现方式中所执行的步骤，并实现相应的技术效果，具体均可以参阅第三方面，此处不再赘述。
本申请第十方面提供了一种通信装置，该装置可以实现上述第四方面或第四方面任一种可能的实现方式中的方法。该装置包括用于执行上述方法的相应的单元或模块。该装置包括的单元或模块可以通过软件和/或硬件方式实现。例如，该装置可以为网络设备，或者，该装置可以为网络设备中的组件(例如处理器、芯片或芯片系统等)，或者该装置还可以为能实现全部或部分网络设备功能的逻辑模块或软件。在第十方面及其可能的实现方式中，以该通信装置为网络设备为例进行描述。
其中，该装置包括处理单元和收发单元；在该收发单元已发送第一消息且终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元确定不忽略该第一消息中的第一指示信息，或者，该处理单元忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息；其中，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接，该第一指示信息用于指示不更新第一信息，该第一信息用于指示该终端设备最后使用的小区，该第二指示信息用于指示接入网络的等待时间；该处理单元释放该RRC连接。
在第十方面的一种可能的实现方式中，该处理单元还用于根据该第一指示信息确定不更新第二信息，该第二信息用于该终端设备访问过的一个或多个小区。
在第十方面的一种可能的实现方式中，该第二信息包括该终端设备访问过的一个或多个小区的标识。
在第十方面的一种可能的实现方式中，该第一信息包括该终端设备最后使用的小区信息。
在第十方面的一种可能的实现方式中，在该终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元确定该终端设备不忽略该第一消息中的第一指示信息，或者，该处理单元确定该终端设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息。
在第十方面的一种可能的实现方式中，该收发单元还用于向核心网设备发送第二信息。
在第十方面的一种可能的实现方式中，该收发单元还用于接收第一能力信息，该第一能力信息指示该终端设备支持寻呼提前指示PEI。
在第十方面的一种可能的实现方式中，该收发单元还用于发送第三指示信息，该第三指示信息指示该网络设备支持PEI。
本申请实施例第十方面中，通信装置的组成模块还可以用于执行第三方面的各个可能实现方式中所执行的步骤，并实现相应的技术效果，具体均可以参阅第三方面，此处不再赘述。
本申请第十一方面提供了一种通信装置，该装置可以实现上述第五方面或第五方面任一种可能的实现方式中的方法。该装置包括用于执行上述方法的相应的单元或模块。该装置包括的单元或模块可以通过软件和/或硬件方式实现。例如，该装置可以为终端设备，或者，该装置可以为终端设备中的组件(例如处理器、芯片或芯片系统等)，或者该装置还可以为能实现全部或部分终端设备功能的逻辑模块或软件。在第九方面及其可能的实现方式中，以该通信装置为终端设备为例进行描述。
其中，该装置包括处理单元和收发单元；在该收发单元接收到第一消息且该终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元根据该第一消息处理第一信息，该第一信息用于指示该终端设备最后使用的小区信息，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接；该处理单元释放该RRC连接。
在第十一方面的一种可能的实现方式中，该处理单元根据该第一消息处理第一信息包括：在该第一 消息包括第一指示信息的情况下，该处理单元确定不更新该第一信息，该第一指示信息用于指示不更新该第一信息。
在第十一方面的一种可能的实现方式中，该处理单元根据该第一消息处理第一信息包括：在该第一消息不包括第一指示信息的情况下，该处理单元基于该第一消息对应的小区更新该第一信息，该第一指示信息用于指示不更新该第一信息。
在第十一方面的一种可能的实现方式中，该第一信息包括该终端设备最后使用的小区信息。
在第十一方面的一种可能的实现方式中，在满足以下任一项时，该处理单元确定该终端设备与该网络设备之间的接入层安全未激活，包括：该处理单元确定未接收到安全模式命令消息；在该收发单元接收该安全模式命令消息之后，该处理单元确定基于该安全模式命令消息推演密钥的过程失败；或，在该收发单元接收该安全模式命令消息之后，该处理单元确定该安全模式命令消息对应的完整性保护校验未通过。
在第十一方面的一种可能的实现方式中，该收发单元还用于发送第一能力信息，该第一能力信息指示该终端设备支持寻呼提前指示PEI。
在第十一方面的一种可能的实现方式中，该收发单元还用于接收第三指示信息，该第三指示信息指示该网络设备支持PEI。
本申请实施例第十一方面中，通信装置的组成模块还可以用于执行第四方面的各个可能实现方式中所执行的步骤，并实现相应的技术效果，具体均可以参阅第四方面，此处不再赘述。
本申请第十二方面提供了一种通信装置，该装置可以实现上述第六方面或第六方面任一种可能的实现方式中的方法。该装置包括用于执行上述方法的相应的单元或模块。该装置包括的单元或模块可以通过软件和/或硬件方式实现。例如，该装置可以为网络设备，或者，该装置可以为网络设备中的组件(例如处理器、芯片或芯片系统等)，或者该装置还可以为能实现全部或部分网络设备功能的逻辑模块或软件。在第十二方面及其可能的实现方式中，以该通信装置为网络设备为例进行描述。
其中，该装置包括处理单元和收发单元；在该收发单元已发送第一消息且终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元根据该第一消息处理第二信息，该第二信息用于指示该终端设备访问过的一个或多个小区，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接；该处理单元释放该RRC连接。
在第十二方面的一种可能的实现方式中，该处理单元根据该第一消息处理第二信息包括：在该第一消息包括第一指示信息的情况下，该处理单元确定不更新该第二信息，该第一指示信息用于指示不更新第一信息，该第一信息用于指示该终端设备最后使用的小区信息。
在第十二方面的一种可能的实现方式中，该处理单元根据该第一消息处理第一信息包括：在该第一消息不包括第一指示信息的情况下，该处理单元基于该第一消息对应的小区更新该第二信息，该第一指示信息用于指示不更新该第一信息，该第一信息用于指示该终端设备最后使用的小区信息。
在第十二方面的一种可能的实现方式中，该第一信息包括该终端设备最后使用的小区信息。
在第十二方面的一种可能的实现方式中，该第二信息包括该终端设备访问过的一个或多个小区的标识。
在第十二方面的一种可能的实现方式中，该处理单元根据该第一消息确定该终端设备是否更新该第一信息。
在第十二方面的一种可能的实现方式中，该收发单元还用于接收第一能力信息，该第一能力信息指示该终端设备支持寻呼提前指示PEI。
在第十二方面的一种可能的实现方式中，该收发单元还用于发送第三指示信息，该第三指示信息指示该网络设备支持PEI。
本申请实施例第十二方面中，通信装置的组成模块还可以用于执行第六方面的各个可能实现方式中所执行的步骤，并实现相应的技术效果，具体均可以参阅第六方面，此处不再赘述。
本申请实施例第十三方面提供了一种通信装置，包括至少一个处理器，所述至少一个处理器与存储 器耦合；该存储器用于存储程序或指令；该至少一个处理器用于执行该程序或指令，以使该装置实现前述第一方面至第六方面中任一方面中的任意一种可能的实现方式所述的方法。
本申请实施例第十四方面提供了一种通信装置，包括至少一个逻辑电路和输入输出接口；该逻辑电路和输入输出接口用于执行如前述第一方面至第六方面中任一方面中的任意一种可能的实现方式所述的方法。
本申请实施例第十五方面提供一种存储一个或多个计算机执行指令的计算机可读存储介质，当计算机执行指令被处理器执行时，该处理器执行如上述第一方面至第六方面中任一方面中的任意一种可能的实现方式所述的方法。
本申请实施例第十六方面提供一种计算机程序产品(或称计算机程序)，当计算机程序产品被该处理器执行时，该处理器执行上述第一方面至第六方面中任一方面中的任意一种可能的实现方式所述的方法。
本申请实施例第十七方面提供了一种芯片系统，该芯片系统包括至少一个处理器，用于支持通信装置实现上述第一方面至第六方面中任一方面中的任意一种可能的实现方式所述的方法所涉及的功能。
在一种可能的设计中，该芯片系统还可以包括存储器，存储器，用于保存该通信装置必要的程序指令和数据。该芯片系统，可以由芯片构成，也可以包含芯片和其他分立器件。可选的，所述芯片系统还包括接口电路，所述接口电路为所述至少一个处理器提供程序指令和/或数据。
本申请实施例第十八方面提供了一种通信系统，该通信系统包括上述第一方面中的终端设备和第二方面中的网络设备，或，该通信系统包括上述第三方面中的终端设备和第四方面中的网络设备，或，该通信系统包括上述第五方面中的终端设备和第六方面中的网络设备。
或者，该通信系统包括上述第七方面的通信装置和第八方面的通信装置，或，该通信系统包括上述第九方面的通信装置和第十方面的通信装置，或，该通信系统包括上述第十一方面的通信装置和第十二方面的通信装置，或，该通信系统包括上述第十三方面的通信装置，或，该通信系统包括上述第十四方面的通信装置。
其中，第七方面至第十八方面中任一种设计方式所带来的技术效果可参见上述第一方面至第六方面中任一方面的不同设计方式所带来的技术效果，在此不再赘述。
附图说明
图1a为本申请提供的通信场景的一个示意图；
图1b为本申请提供的通信场景的另一个示意图；
图1c为本申请提供的通信场景的另一个示意图；
图2a为本申请涉及的寻呼过程的一个示意图；
图2b为本申请涉及的寻呼过程的另一个示意图；
图3a为本申请提供的通信场景的另一个示意图；
图3b为本申请提供的通信场景的另一个示意图；
图4为本申请涉及的通信方法的一个示意图；
图5为本申请涉及的通信方法的另一个示意图；
图6为本申请涉及的通信方法的另一个示意图；
图7为本申请涉及的通信方法的另一个示意图；
图8为本申请涉及的通信方法的另一个示意图；
图9为本申请提供的通信装置的一个示意图；
图10为本申请提供的通信装置的另一个示意图；
图11为本申请提供的通信装置的另一个示意图；
图12为本申请提供的通信装置的另一个示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。
首先，对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
(1)终端设备：可以是能够接收网络设备调度和指示信息的无线终端设备，无线终端设备可以是指向用户提供语音和/或数据连通性的设备，或具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备。
终端设备可以经无线接入网(radio access network，RAN)与一个或多个核心网或者互联网进行通信，终端设备可以是移动终端设备，如移动电话(或称为“蜂窝”电话，手机(mobile phone))、计算机和数据卡，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言和/或数据。例如，个人通信业务(personal communication service，PCS)电话、无绳电话、会话发起协议(SIP)话机、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、平板电脑(Pad)、带无线收发功能的电脑等设备。无线终端设备也可以称为系统、订户单元(subscriber unit)、订户站(subscriber station)，移动站(mobile station)、移动台(mobile station，MS)、远程站(remote station)、接入点(access point，AP)、远程终端设备(remote terminal)、接入终端设备(access terminal)、用户终端设备(user terminal)、用户代理(user agent)、用户站(subscriber station，SS)、用户端设备(customer premises equipment，CPE)、终端(terminal)、用户设备(user equipment，UE)、移动终端(mobile terminal，MT)等。终端设备也可以是可穿戴设备以及下一代通信系统，例如，5G通信系统中的终端设备或者未来演进的公共陆地移动网络(public land mobile network，PLMN)中的终端设备等。
(2)网络设备：可以是无线网络中的设备，例如网络设备可以为将终端设备接入到无线网络的无线接入网(radio access network，RAN)节点(或设备)，又可以称为基站。目前，一些RAN设备的举例为：5G通信系统中的新一代基站(generation Node B，gNodeB)、传输接收点(transmission reception point，TRP)、演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(例如，home evolved Node B，或home Node B，HNB)、基带单元(base band unit，BBU)，或无线保真(wireless fidelity，Wi-Fi)接入点(access point，AP)等。另外，在一种网络结构中，网络设备可以包括集中单元(centralized unit，CU)节点、或分布单元(distributed unit，DU)节点、或包括CU节点和DU节点的RAN设备。
其中，网络设备能够向终端设备发送配置信息(例如承载于调度消息和/或指示消息中)，终端设备进一步根据该配置信息进行网络配置，使得网络设备与终端设备之间的网络配置对齐；或者，通过预设于网络设备的网络配置以及预设于终端设备的网络配置，使得网络设备与终端设备之间的网络配置对齐。具体来说，“对齐”是指网络设备与终端设备之间存在交互消息时，两者对于交互消息收发的载波频率、交互消息类型的确定、交互消息中所承载的字段信息的含义、或者是交互消息的其它配置的理解一致。
此外，在其它可能的情况下，网络设备可以是其它为终端设备提供无线通信功能的装置。本申请的实施例对网络设备所采用的具体技术和具体设备形态不做限定。为方便描述，本申请实施例并不限定。
网络设备还可以包括核心网设备，核心网设备例如包括访问和移动管理功能(access and mobility management function，AMF)、用户面功能(user plane function，UPF)或会话管理功能(session management function，SMF)等。
本申请实施例中，用于实现网络设备的功能的装置可以是网络设备，也可以是能够支持网络设备实现该功能的装置，例如芯片系统，该装置可以被安装在网络设备中。在本申请实施例提供的技术方案中，以用于实现网络设备的功能的装置是网络设备为例，描述本申请实施例提供的技术方案。
(3)无线资源控制(radio resource control，RRC)状态，终端设备至少有3种RRC状态：RRC连接态(connected态)、RRC空闲态(idle态)和非激活态(inactive态)。
RRC连接态(或，也可以简称为连接态。在本文中，“连接态”和“RRC连接态”，是同一概念，两种称呼可以互换)：终端设备与网络建立了RRC连接，可以进行数据传输。
RRC空闲态(或，也可以简称为空闲态。在本文中，“空闲态”和“RRC空闲态”，是同一概念，两种称呼可以互换)：终端设备没有与网络建立RRC连接，基站没有存储该终端设备的上下文。如果终端设备需要从RRC空闲态进入RRC连接态，则需要发起RRC连接建立过程。
RRC非激活态(或，也可以简称为非激活态。在本文中，“去活动态”、“去激活态”、“非激活态”、“RRC非激活态”和“RRC去激活态”，是同一概念，这几种称呼可以互换)：终端设备之前进入了RRC连接态，然后基站释放了RRC连接，但是基站保存了该终端设备的上下文。如果该终端设备需要从RRC非激活态再次进入RRC连接态，则需要发起RRC恢复过程(或者称为RRC连接恢复过程)。RRC恢复过程相对于RRC建立过程来说，时延更短，信令开销更小。但是基站需要保存终端设备的上下文，会占用基站的存储开销。
(4)系统信息(system information，SI)
应理解，系统信息是基站发送的消息，其中包含UE初始化所需的信息以及一些其他功能/特性的相关信息。其中，系统信息分为最小系统信息(minimum SI)和其他系统信息(other SI，OSI)。最小系统信息由主信息块(master information block，MIB)和系统信息块1(system information block1，SIB1)组成，SIB1也称为剩余最小系统信息(remaining minimum SI，RMSI)。
可选地，MIB会周期性地在广播信道(broadcast channel，BCH)上广播。SIB1周期性地在下行链路共享信道(downlink shared channel，DL-SCH)上广播，或者通过专用信令的方式发送给RRC连接态(RRC_CONNECTED)的终端设备。
其他系统信息由其他的SIB组成，例如，SIB2～SIB9等。其他SIB周期性地在DL-SCH上广播，或者按需(on-demand)地在DL-SCH上广播(即，当RRC空闲态(RRC_IDLE)或RRC非激活态(RRC_INACTIVE)终端设备请求了某SIB，网络设备才广播该SIB，否则不发送该SIB)，或者通过专用信令的方式发送给RRC连接态UE。
可选地，RRC空闲态和RRC非激活态的终端设备获取系统信息的基本流程是，终端设备首先获取MIB，根据MIB内的调度信息获取SIB1，再根据SIB1内的调度信息获取其他SIB。
可选地，SIB1中配置默认寻呼周期T，寻呼周期中PF的个数(N)和PF的偏移(PF_offset)，一个PF对应PO数量(Ns)等参数。
(5)配置与预配置：在本申请中，会同时用到配置与预配置。其中，配置是指网络设备/服务器通过消息或信令将一些参数的配置信息或参数的取值发送给终端，以便终端根据这些取值或信息来确定通信的参数或传输时的资源。预配置与配置类似，可以是网络设备/服务器预先与终端设备协商好的参数信息或参数值，也可以是标准协议规定的基站/网络设备或终端设备采用的参数信息或参数值，还可以是预先存储在基站/服务器或终端设备的参数信息或参数值。本申请对此不做限定。
进一步地，这些取值和参数，是可以变化或更新的。
(6)本申请实施例中的术语“系统”和“网络”可被互换使用。“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A、同时存在A和B、单独存在B的情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如“A，B和C中的至少一个”包括A，B，C，AB，AC，BC或ABC。以及，除非有特别说明，本申请实施例提及“第一”、“第二”等序数词是用于对多个对象进行区分，不用于限定多个对象的顺序、时序、优先级或者重要程度。
本申请中，除特殊说明外，各个实施例之间相同或相似的部分可以互相参考。在本申请中各个实施例、以及各实施例中的各个方法/设计/实现方式中，如果没有特殊说明以及逻辑冲突，不同的实施例之间、以及各实施例中的各个方法/设计/实现方式之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例、以及各实施例中的各个方法/设计/实现方式中的技术特征根据其内在的逻辑关系可以组合形成新的实施例、方法、或实现方式。以下所述的本申请实施方式并不构成对本申请保护范围的限定。
请参阅图1a，为本申请中通信系统的一种示意图。图1a中，示例性的示出了一个网络设备101和6个终端设备，6个终端设备分别为终端设备1、终端设备2、终端设备3、终端设备4、终端设备5以及终端设备6等。在图1a所示的示例中，是以终端设备1为智能茶杯，终端设备2为智能空调，终端设备3为智能加油机，终端设备4为交通工具，终端设备5为手机，终端设备6为打印机进行举例说明的。
如图1a所示，在通信过程中，信号发送设备(或称为发射端、发射端设备)可以是网络设备，信号接收设备(或称为接收端、接收端设备)可以是终端设备；或者，信号发送设备可以是终端设备，信号接收设备可以是网络设备；或者，信号发送设备和信号接收设备都可以是网络设备；或者，信号发送设备和信号接收设备都可以是终端设备。
本申请可以应用于长期演进(long term evolution，LTE)系统、新无线(new radio，NR)系统，或者是5G之后演进的通信系统(例如6G等)。其中，该通信系统中包括至少一个网络设备和/或至少一个终端设备。
作为一种实现示例，图1b为5G NR系统架构图。其中，5G核心网(5G core network，5GC)可以包括接入与移动性管理功能(Aaccess and mobility management function，AMF)和用户平面功能(user plane function，UPF)等网元。5G无线接入网(NG-RAN)可以包括5G接入网(记为gNB)和连接到5GC的4G接入网(记为ng-eNB)等网元。
可选地，在图1b所示示例中，终端设备的服务基站gNB负责为终端设备提供5G NR的用户平面与控制平面协议功能；终端设备的服务基站ng-eNB负责为终端设备提供4G E-UTRA的用户平面与控制平面协议功能。
作为另一种实现示例，图1c为LTE系统架构图。其中，4G核心网可以为演进的分组核心网(evolved packet core，EPC)，包括移动性管理实体(mobility management entity，MME)和服务网关(serving gateway，S-GW)等网元。4G无线接入网可以为E-UTRAN，看可以包括4G基站(记为eNB)和连接到EPC的5G基站(记为en-gNB)等网元。
可选地，在图1c所示示例中，终端设备的服务基站eNB负责为UE提供LTE的用户平面与控制平面协议功能；终端设备的服务基站en-gNB负责为终端设备提供5G NR的用户平面与控制平面协议功能。
在上述图1a至图1c所示任一实现示例中，网络设备可以向终端设备发起寻呼。其中，寻呼是网络设备针对某个终端设备会在该网络设备计算的寻呼时机(paging occasion，PO)发送寻呼，而终端设备在相同的PO接收寻呼消息，从而实现在网络下寻找特定的某个终端设备目的。
此外，寻呼支持非连续接收(discontinuous reception，DRX)，这样可以使终端设备只在固定的时间内醒来接收寻呼消息，其余时间可以休眠以降低功耗，提升电池使用时间。示例性的，每次唤醒的周期是DRX周期，一个DRX周期内有一个或多个寻呼帧(paging frame，PF)，一个PF对应一个或多个PO，一个终端设备需要在某个PO上接收寻呼消息。
可选地，用于寻呼的PF和PO由以下方式确定。
PF的系统帧号(记为(SFN+PF_offset)mod T)，通过以下方式确定：
(SFN+PF_offset)mod T＝(T div N)*(终端设备_ID mod N)；
PO的索引(记为i_s)，通过以下方式确定：
i_s＝floor(终端设备_ID/N)mod Ns；
其中，各个参数的定义如下：
T：终端设备的DRX周期。
N：一个寻呼周期中PF的个数。
PF_offset：PF的偏移。
UE_ID：5G-S-TMSI mod 1024。
示例性的，图2a是一种寻呼的基本流程示意。从核心网发起的寻呼的整个流程。
1.核心网网元(例如AMF)通过NGAP寻呼消息发送给接入网网元(例如gNB)，里面携带终端设备寻呼记录列表，里面包含5G-s-临时移动用户识别码(5G S-Temporary mobile subscription identifier，5G-s-TMSI)带给网络设备。
2.接入网网元收到NGAP寻呼消息之后，根据寻呼参数和5G-S-TMSI可以计算出具体的PF和PO位置。
3.终端设备根据终端设备标识5G-S-TMSI计算出寻呼具体的PF和PO位置，在该时刻使用寻呼消息-无线网络临时标识(paging-radio network temporary identifier，P-RNTI)解扰解寻呼物理下行链路控制信道(physical downlink control channel，PDCCH)和物理下行共享信道(physical downlink shared channel，PDSCH)(寻呼消息)。
在寻呼过程中，多个终端设备监听同一寻呼时机(paging occasion，PO)的情况下，如果某次寻呼仅针对多个终端设备中的部分终端设备，那么对于未被寻呼的终端设备来说，就存在不必要的寻呼接收进而产生不必要的功耗，这种情况被称为寻呼虚警(false alarm)。
由上述寻呼过程的实现示例可知，产生寻呼虚警的主要原因之一是存在多个终端设备监听同一PO的情况，因为按照协议规定的计算公式，尽管一个核心网下分配的5G-S-TMSI可以不同，但是UE_ID(即5G-S-TMSI mod 1024)可能相同，根据上述PF，PO的确定方式可知，不同终端设备计算出的PO位置可能是相同的。另外，在寻呼机制下，终端设备在接收到寻呼下行控制信息(downlink control information，DCI)时获得寻呼消息的调度信息，而不能知道本次寻呼消息是否为针对自己的寻呼消息，终端设备只能在随后接收并解码完PDSCH上的寻呼消息后，根据寻呼消息中的终端设备标识信息才能判断出本次寻呼是否针对本终端设备。因此，当多个终端设备监听同一PO时，如果某次寻呼仅针对其中部分终端设备，那么对于实际未被寻呼的终端设备来说，就存在不必要的寻呼接收，产生不必要的终端设备功耗。
目前，对终端设备进行分组的机制是降低寻呼虚警的技术之一。该技术的基本思想是将监听同一PO的终端设备进行分组(即把同一PO上终端设备分到不同的组内)，网络设备在寻呼时，PEI指示本次寻呼所针对的PO的个数和每个PO上终端设备分到不同的终端设备子组。使得终端设备在接收寻呼PDCCH和寻呼PDSCH(寻呼消息)之前，就可以获知本次是否需要接收寻呼，降低终端设备不必要的接收解码寻呼的概率，进而降低终端设备解不是本终端设备的寻呼PDCCH和寻呼PDSCH(寻呼消息)产生的功耗。
可选地，PEI是通过格式(DCI2-7)PDCCH来指示终端设备的。它能指示后面几个PO及每个PO中终端设备子组是否需要来监听寻呼PDCCH和寻呼PDSCH(寻呼消息)。一种实现示例如图2b所示，终端设备1(图中记为UE1)，终端设备4(图中记为UE4)为第一个PO的终端设备子组1，通过PEI中第一PO所属M个子组中的第一个子组，由于指示为“1”，表明终端设备1，终端设备4需要在第一PO的位置进行监听PDCCH，解到寻呼DCI之后，根据寻呼DCI指示的调度信息，解PDSCH(寻呼消息)。而终端设备2(图中记为UE2)，终端设备3(图中记为UE3)为第一个PO的终端设备子组2，通过PEI中第一PO所属M个子组中的第一个子组，由于指示为“0”，表明终端设备2，终端设备3不需要在第一PO的位置进行监听PDCCH。
此外，网络设备所发送的SIB1中新增指示信息(例如该指示信息可以为pei-Config-r17信元中的lastUsedCellOnly-r17信元)，当该指示信息存在时，终端设备需根据当前小区是否为自己的最后使用的小区(last used cell)确定是否监听PEI。然而，对于终端设备而言，如何确定该终端设备最后使用的小区，是一个亟待解决的技术问题。
一种可能的实现方式中，终端设备可以根据RRC release消息的情况确定自己的last used cell。具体地，终端设备最近接收到的不包含noLastCellUpdate-r17信元的RRCRelease消息的小区是终端设备的last used cell。换言之，RRCRelease消息中新增noLastCellUpdate-r17信元，若noLastCellUpdate-r17信元存在，用于PEI的last used cell不更新，否则，更新为当前小区。然而，对于终端设备而言，基于该实现方式确定最后使用的小区的过程中，有可能存在误更新的过程，下面将结合图3a(下文记为场景一)以及图3b(下文记为场景二)的实现示例进行说明。
考虑如图3a所示场景一，支持PEI能力终端设备首先在小区A上驻留，随后建立连接，终端设备收到来自小区A的RRCRelease消息之后，小区A广播的SIB1，PEI配置中包含lastUsedCellOnly-r17信元，且来自小区A的RRCRelease消息中，noLastCellUpdate-r17信元不存在，终端设备将保存last used cell为小区A。
此时，如果附近有小区B(例如该小区B有可能位于伪基站对应的一个或多个小区)，由于下行功率更高，终端设备接收到的小区B信号更好，终端设备可能通过重选/重定向方式驻留到小区B上，且随 后在小区B发起建链，在建链成功之后，进行非接入层(non-access stratum，NAS)和接入层(access stratum，AS)鉴权，鉴权失败后，小区B会下发空口RRCRelease消息。
考虑如图3b所示场景二，类似于场景一的实现过程，支持PEI能力终端设备首先在NR网络设备小区A上驻留，随后进行建链，终端设备收到gNB的空口RRCRelease消息，小区A广播的SIB1，PEI配置中包含lastUsedCellOnly-r17信元，且空口RRCRelease消息中，noLastCellUpdate-r17信元不存在，终端设备将保存last used cell为小区A。
此时，如果附近有普通小区B(例如该小区B有可能位于正常工作的基站(即该基站不是伪基站)对应的一个或多个小区)，终端设备可能通过重选/重定向方式驻留到小区B上，且随后在小区B发起建链，由于接入网网元临时发生过载或者接入网网元临时发现核心网网元过载，则接入网网元和核心网网元之间不能建立连接，AS安全不能激活，小区B会下发空口RRCRelease消息释放终端设备，并且通过noLastCellUpdate来指示终端设备不要更新last used cell。
对于图3a所示场景一：
一方面，由于终端设备在伪基站的小区B下收到空口RRCRelease消息，若AS安全未激活时，则该终端设备将会按照协议/标准中的规定忽略除RRCRelease消息携带的等待时间(waitTime)参数之外的其他内容。不管空口RRCRelease消息是否携带noLastCellUpdate-r17信元，last used cell都将被误更新为小区B。为此，后续从小区B再重新到重选到小区A，由于last used cell为小区B，不是小区A，导致PEI功能不能正常使用。
对于图3b所示场景二：
由于终端设备在小区B下收到空口RRCRelease消息，若AS安全未激活时，则该终端设备将会按照协议/标准中的规定忽略除RRCRelease消息携带的等待时间(waitTime)参数之外的其他内容。尽管空口RRCRelease消息携带noLastCellUpdate-r17信元，但按照协议忽略该信元，last used cell被误更新为小区B。为此，后续从小区B再重新到重选到小区A，由于last used cell为小区B，不是小区A，导致PEI功能不能正常使用。
由上述内容可知，如何确定该终端设备最后使用的小区，是一个亟待解决的技术问题，并且，上述图3a和图3b所示实现示例中所使用的实现方式容易带来PEI功能不能正常使用的问题。为此，为了解决上述问题，本申请提供了一种通信方法及通信装置，用于避免由于终端设备误更新导致寻呼错误的情况出现，以增强终端设备基于第一信息实现的PEI功能并降低该终端设备的功耗。下面将结合附图进一步说明。
请参阅图4，为本申请提供的通信方法的一个实现示意图。
S401.网络设备发送第一消息。
本实施例中，网络设备在步骤S401中发送第一消息，相应的，终端设备在步骤S401中接收该第一消息。其中，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制(radio resource control，RRC)连接。
本申请中，用于指示释放该终端设备与网络设备之间的RRC连接的第一消息的消息名称可以为RRC释放(RRCReleace)消息，该名称为目前通信系统中的名称，在未来通信系统中，用于指示释放该终端设备与网络设备之间的RRC连接的消息的名称可能随着通信系统的演进而改变。
S402.终端设备确定不更新第一信息。
本实施例中，终端设备与该网络设备之间的接入层(access stratum，AS)安全未激活的情况下，终端设备在步骤S402中确定不更新第一信息。其中，该第一信息用于指示该终端设备最后使用的小区。
应理解，第一信息所指示的终端设备的最后使用的小区(last used cell)可以称为终端设备最近接入过的小区，终端设备最近访问过的小区，终端设备被释放连接的小区，向终端设备发送该第一消息的小区，终端设备最后被服务的小区等。
需要说明的是，在步骤S402中，终端设备确定不更新第一信息，可以表述为终端设备不更新第一信息，也可以表述为终端设备无需识别该第一消息中是否携带指示更新(或不更新)第一信息的指示信 息而确定不更新该第一信息，也可以表述为终端设备不执行更新第一信息，也可以表述为终端设备维持第一信息不变，也可以表述为终端设备维护的第一信息不变等。
在一种可能的实现方式中，终端设备在步骤S402中确定不更新的第一信息包括该终端设备最后使用的小区信息。
可选地，该第一信息可以包括该终端设备最后使用的小区的标识，例如该标识可以为小区全球标识(cell global identifier，CGI)，物理小区标识(physical cell identifier，PCI)等。
一种实现示例中，终端设备在步骤S401之前维护的第一信息所指示的最后使用的小区是小区1。此后，该终端设备在步骤S401中接收来自小区2的第一消息(小区2位于步骤S401中发送第一消息的网络设备对应的一个或多个小区)，在步骤S402中，该终端设备确定不更新第一信息，即该终端设备在步骤S402中确定无需对维护的第一信息进行更新，依然维护第一信息所指示的最后使用的小区是小区1。
另一种实现实例中，终端设备在步骤S401之前维护的第一信息所指示的最后使用的小区是空(即终端设备尚未维护自己的第一信息)。此后，该终端设备在步骤S401中接收来自小区2的第一消息(小区2位于步骤S401中发送第一消息的网络设备对应的一个或多个小区)，在步骤S402中，该终端设备确定不更新第一信息，即该终端设备在步骤S402中确定无需对维护的第一信息进行更新，依然维护第一信息所指示的最后使用的小区是空(即不将小区2维护为第一信息所指示的最后使用的小区)。
在一种可能的实现方式中，网络设备在步骤S401中发送第一消息之后，在该终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备确定该终端设备(将会在步骤S401之后，例如步骤S402中)不更新第一信息，该第一信息用于指示该终端设备最后使用的小区。具体地，在该终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备可以确定无法基于接入层安全机制与该终端设备之间进行通信，为此，该网络设备确定该终端设备不更新第一信息，以便于网络设备与终端设备对齐两者对该第一信息的理解，以期减少通信出错的可能性。
在一种可能的实现方式中，终端设备在步骤S401中接收的第一消息包含第一指示信息，该第一指示信息用于指示不更新该第一信息；相应的，在步骤S402中，在该终端设备与该网络设备之间的接入层安全未激活的情况下，该终端设备忽略该第一指示信息。具体地，在该终端设备与该网络设备之间的接入层安全未激活的情况下，该终端设备可以确定无法基于接入层安全机制与该网络设备之间进行通信，为此，该终端设备可以忽略该第一消息携带的第一指示信息而确定不更新该第一信息。换言之，该终端设备可以无需识别该第一消息中是否携带指示更新(或不更新)第一信息的指示信息而确定不更新该第一信息，以避免由于终端设备误更新导致寻呼错误的情况出现。
应理解，本申请中，该第一指示信息的名称可以为不更新最后使用的小区(noLastCellUpdate)信元/字段/域/参数，该名称为目前通信系统中的名称，在未来通信系统中，该第一指示信息的名称可能随着通信系统的演进而改变。
在一种可能的实现方式中，终端设备在步骤S401中接收的第一消息包括第二指示信息，该第二指示信息用于指示接入网络的等待时间(wait time)；相应的，在步骤S402中，该终端设备忽略该第一消息中除该第二指示信息之外的至少一个信息，该至少一个信息包括第一指示信息，该第一指示信息用于指示不更新该第一信息。具体地，终端设备接收的第一消息可以包括用于指示接入网络的等待时间的第二指示信息，以便于该终端设备后续可以基于该第二指示信息重新建立与网络设备之间的连接。此外，在该终端设备与该网络设备之间的接入层安全未激活的情况下，该终端设备可以确定无法基于接入层安全机制与该网络设备之间进行通信，为此，该终端设备可以忽略该第一消息中除该第二指示信息之外的至少一个信息。
可选地，该终端设备忽略该第一消息中除该第二指示信息之外的至少一个信息可以包括该终端设备忽略该第一消息中除该第二指示信息之外的其它信息。
可选地，第二指示信息还可以表述为其它方式，包括：第二指示信息用于指示定时器T302的定时时长(其中，T302指示终端设备重新建立或恢复RRC连接的等待时间)，第二指示信息用于指示终端设备的接入尝试(access attempt)的等待时间，第二指示信息用于指示控制终端设备建立RRC连接的等待时间等。
应理解，本申请中，该第二指示信息的名称可以为等待时间(waitTime)信元/字段/域/参数，该名称为目前通信系统中的名称，在未来通信系统中，该第而指示信息的名称可能随着通信系统的演进而改变。
可选地，在步骤S401之后，在该终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备确定该终端设备忽略该第一消息中除该第二指示信息之外的至少一个信息，该至少一个信息包括第一指示信息，该第一指示信息用于指示不更新第一信息，该第一信息用于指示该终端设备最后使用的小区。具体地，网络设备在步骤S401中发送的第一消息可以包括用于指示接入网络的等待时间的第二指示信息，以便于该终端设备后续可以基于该第二指示信息重新建立与网络设备之间的连接。此外，在该终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备可以确定无法基于接入层安全机制与该终端设备之间进行通信，为此，该网络设备可以确定该终端设备忽略该第一消息中除该第二指示信息之外的至少一个信息，以便于网络设备与终端设备对齐两者对该第一消息的理解，以期减少通信出错的可能性。
在一种可能的实现方式中，在满足以下任一项时，该终端设备在步骤S402中确定该终端设备与该网络设备之间的接入层安全未激活，包括：该终端设备确定未接收到安全模式命令消息；该终端设备接收该安全模式命令消息之后，该终端设备确定基于该安全模式命令消息推演密钥的过程失败；或，该终端设备接收该安全模式命令消息之后，该终端设备确定该安全模式命令消息对应的完整性保护校验未通过。具体地，终端设备可以通过上述多种方式确定该终端设备与该网络设备之间的接入层安全未激活，以提升方案实现的灵活性。
在一种可能的实现方式中，在步骤S401之前，该方法还包括：该终端设备发送第一能力信息，该第一能力信息指示该终端设备支持PEI。具体地，终端设备可以向网络设备发送指示该终端设备支持PEI的第一能力信息，以便于该网络设备基于该第一能力信息明确该终端设备支持PEI并基于PEI机制与该终端设备通信。
在一种可能的实现方式中，在图4所示实施例中(任意步骤之前或之后)，该方法还包括：该终端设备接收第三指示信息，该第三指示信息指示该网络设备支持PEI。具体地，网络设备可以向终端设备发送指示该网络设备支持PEI的第三指示信息，以便于该终端设备基于该第三指示信息明确该网络设备支持PEI并基于PEI机制与该网络设备通信。
可选地，除了上述第一能力信息和第三指示信息交互的实现方式，终端设备和网络设备还可以通过其它实现方式获知对端的能力信息。例如，通过其它设备之间的交互的实现方式，该其他设备可以为核心网设备、侧行链路(sidelink)设备，服务器等。又如，通过协议/标准预配置的实现方式。
上面描述了在该终端设备与该网络设备之间的接入层安全未激活的情况下，该终端设备在步骤S402中可能执行的实现过程，下面将通过对该情况下，网络设备可能执行的实现过程进行示例性描述。
在一种可能的实现方式中，在网络设备确定已在步骤S401中发送第一消息且终端设备与该网络设备之间的接入层安全未激活的情况下，在步骤S403中，该网络设备确定不更新第二信息，该第二信息用于指示该终端设备访问过的一个或多个小区。
具体地，网络设备可以维护用于指示该终端设备访问过的一个或多个小区的第二信息。其中，网络设备在发送指示释放该终端设备与网络设备之间的RRC连接的第一消息并释放该RRC连接的场景中，该终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备确定不更新该第二信息。其中，在该接入层安全未激活的情况下，网络设备可以确定无法基于接入层安全机制与该终端设备之间进行通信。从而，网络设备确定不更新该第二信息的方式使得该网络设备不会基于发送该第一消息的小区(该小区位于该网络设备对应的一个或多个小区中)更新第二信息，可以避免由于网络设备误更新导致寻呼错误的情况出现，以增强网络设备基于该第二信息实现的PEI功能并降低该网络设备的功耗。
可选地，网络设备确定不更新第二信息，可以表述为网络设备不更新第二信息，也可以表述为网络设备无需识别该第一消息中是否携带指示更新(或不更新)第一信息的指示信息而确定不更新该第二信息，也可以表述为网络设备不执行更新第二信息，也可以表述为网络设备维持第二信息不变，也可以表述为网络设备维护的第二信息不变等。
可选地，在步骤S401之后，在该终端设备与该网络设备之间的接入层安全未激活的情况下，在步骤S403中，该网络设备确定该终端设备忽略该第一指示信息。具体地，在该终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备可以确定无法基于接入层安全机制与该终端设备之间进行通信，为此，该网络设备确定该终端设备忽略该第一指示信息，以便于网络设备与终端设备对齐两者对该第一信息的理解，以期减少通信出错的可能性。
在一种可能的实现方式中，该网络设备向核心网设备发送该第二信息。具体地，该网络设备还可以向核心网设备发送用于指示该终端设备访问过的一个或多个小区的第二信息，以便于该核心网设备与该网络设备对齐两者对该第二信息的理解，以期减少通信出错的可能性。
S404.终端设备和网络设备之间释放RRC连接。
本实施例中，网络设备在步骤S401中发送第一消息之后，该网络设备在步骤S404中释放与该终端设备之间的RRC连接。终端设备在步骤S401中接收第一消息之后，该终端设备在步骤S404中释放与该网络设备之间的RRC连接。
需要说明的是，步骤S402和步骤S404的执行过程均在步骤S401之后，但是本实施例中对步骤S402和步骤S404的执行顺序不做限定。例如，步骤S402可以在步骤S404之后执行，或者，步骤S404可以在步骤S402之后执行。
类似地，若网络设备执行步骤S403的情况下，步骤S403和步骤S404的执行过程均在步骤S401之后，但是本实施例中对步骤S403和步骤S404的执行顺序不做限定。例如，步骤S403可以在步骤S404之后执行，或者，步骤S404可以在步骤S403之后执行。
应理解，在步骤S404中，该终端设备释放该RRC连接可以理解为该终端设备退出RRC连接态，该终端设备可以进入除了RRC连接态之外的其他状态，例如空闲态(idle态)，非激活态(inactive态)等。
可选地，在终端设备与该网络设备之间的接入层安全未激活的情况下，终端设备可以是进入空闲态。
基于图4所示技术方案，终端设备可以维护用于指示该终端设备最后使用的小区的第一信息。其中，终端设备在步骤S401中接收指示释放该终端设备与网络设备之间的RRC连接的第一消息并在步骤S404中释放该RRC连接的场景中，该终端设备与该网络设备之间的接入层安全未激活的情况下，该终端设备在步骤S402中确定不更新该第一信息。其中，在该接入层安全未激活的情况下，终端设备可以确定无法基于接入层安全机制与该网络设备之间进行通信。从而，终端设备确定不更新该第一信息的方式使得该终端设备不会基于发送该第一消息的小区(该小区位于该网络设备对应的一个或多个小区中)更新第一信息，可以避免由于终端设备误更新导致寻呼错误的情况出现，以增强终端设备基于该第一信息实现的PEI功能并降低该终端设备的功耗。
由上述图4所示实施例可知，在终端设备与该网络设备之间的接入层安全未激活的情况下，终端设备在步骤S402中确定不更新第一信息(或网络设备在步骤S403中确定该终端设备不更新第一信息)，这种方式下，终端设备(或网络设备)可以忽略第一消息中用于指示更新(或不更新)第一信息的相关指示信息(例如前文提及的第一指示信息)；换言之，在图4所示实施例中，终端设备(或网络设备)可以无需读取第一消息中用于指示更新(或不更新)第一信息的相关指示信息，而默认确定该终端设备不更新第一信息，可以避免由于终端设备误更新导致寻呼错误的情况出现，以增强终端设备基于该第一信息实现的PEI功能并降低该终端设备的功耗，用以解决前述提及的“如何确定该终端设备最后使用的小区”这一技术问题。下面将结合图5和图6所示实施例介绍本申请提供的其他实施例用以解决该技术问题。
需要说明的是，不同于图4所示实施例中终端设备(或网络设备)无需读取第一消息中用于指示更新(或不更新)第一信息的相关指示信息，而默认确定该终端设备不更新第一信息的实现方式；在下述图5和图6所示实施例，终端设备(或网络设备)需要读取第一消息中用于指示更新(或不更新)第一信息的相关指示信息，并基于该相关指示信息执行相应的操作。下面将结合附图进行详细说明。
请参阅图5，为本申请提供的通信方法的一个实现示意图。
需要说明的是，在图5中，步骤S501和步骤S504的实现过程可以参考前述图4中步骤S401和步骤S404的实现过程，并实现相应的技术效果，后文将不做详述。
S501.网络设备发送第一消息。
本实施例中，网络设备在步骤S501中发送第一消息，相应的，终端设备在步骤S501中接收该第一消息。其中，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制(radio resource control，RRC)连接。
S502.终端设备确定不忽略该第一消息中的第一指示信息，或者，该终端设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息。
本实施例中，终端设备与该网络设备之间的接入层(access stratum，AS)安全未激活的情况下，终端设备在步骤S502中确定不忽略该第一消息中的第一指示信息，或者，该终端设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息。其中，该第一指示信息用于指示不更新第一信息，该第一信息用于指示该终端设备最后使用的小区，该第二指示信息用于指示接入网络的等待时间。
在一种可能的实现方式中，对于网络设备而言，在步骤S501中发送第一消息之后，在该终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备确定该终端设备(将会在步骤S501之后，例如步骤S502中)不忽略该第一消息中的第一指示信息，或者，该网络设备确定该终端设备(将会在步骤S501之后，例如步骤S502中)忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息。具体地，在该终端设备与该网络设备之间的接入层安全未激活的情况下，该网络设备可以确定无法基于接入层安全机制与该终端设备之间进行通信，为此，该网络设备确定该终端设备不忽略该第一消息中的第一指示信息(或者，该网络设备确定该终端设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息)，以便于网络设备与终端设备对齐两者对该第一信息的理解，以期减少通信出错的可能性。
可选地，该终端设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息可以包括：该终端设备忽略该第一消息中除第一指示信息和第二指示信息之外的其它信息。
在一种可能的实现方式中，该方法还包括：该终端设备根据第一指示信息确定不更新该第一信息。具体地，该终端设备确定不忽略该第一指示信息的过程可以包括该终端设备根据第一指示信息确定不更新该第一信息，以便于该终端设备基于网络设备发送的第一指示信息确定不更新该第一信息，使得终端设备和网络设备之间对齐两者对该第一指示信息的理解，以期减少通信出错的可能性。
在一种可能的实现方式中，该第一信息包括该终端设备最后使用的小区信息。
可选地，该第一信息可以包括该终端设备最后使用的小区的标识，例如该标识可以为CGI，PCI等。
在一种可能的实现方式中，在满足以下任一项时，该终端设备在步骤S502中确定该终端设备与该网络设备之间的接入层安全未激活，包括：该终端设备确定未接收到安全模式命令消息；该终端设备接收该安全模式命令消息之后，该终端设备确定基于该安全模式命令消息推演密钥的过程失败；或，该终端设备接收该安全模式命令消息之后，该终端设备确定该安全模式命令消息对应的完整性保护校验未通过。具体地，终端设备可以通过上述多种方式确定该终端设备与该网络设备之间的接入层安全未激活，以提升方案实现的灵活性。
上面描述了在该终端设备与该网络设备之间的接入层安全未激活的情况下，该终端设备在步骤S502中可能执行的实现过程，下面将通过对该情况下，网络设备可能执行的实现过程进行示例性描述。
在一种可能的实现方式中，终端设备与该网络设备之间的接入层安全未激活的情况下，在步骤S503中，该网络设备确定不忽略该第一消息中的第一指示信息，或者，该网络设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息。
具体地，在该接入层安全未激活的情况下，网络设备可以确定无法基于接入层安全机制与该终端设备之间进行通信。从而，该网络设备确定不忽略该第一消息中的第一指示信息(或者，该网络设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息)的方式，使得该网络设备明确该终端设备不会基于发送该第一消息的小区(该小区位于该网络设备对应的一个或多个小区中)更新第一信息，可以避免由于终端设备误更新导致寻呼错误的情况出现，以增强终端设备基于该第一信息实现的PEI功能并降低该终端设备的功耗。
此外，网络设备确定不忽略该第一消息中的第一指示信息(或者，该网络设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息)的方式，还可以使得终端设备和网络设备之间对齐两者对该第一指示信息的理解，以期减少通信出错的可能性。
可选地，该网络设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息可以包括：该网络设备忽略该第一消息中除第一指示信息和第二指示信息之外的其它信息。
在一种可能的实现方式中，在上述实现方式中，该方法还包括：：该网络设备根据该第一指示信息确定不更新第二信息，该第二信息用于该终端设备访问过的一个或多个小区。具体地，该网络设备可以根据该第一指示信息确定不更新用于该终端设备访问过的一个或多个小区的第二信息，以便于终端设备和网络设备之间对齐两者对该第一指示信息的理解，以期减少通信出错的可能性。
在一种可能的实现方式中，该第二信息包括该终端设备访问过的一个或多个小区的标识。可选地，该终端设备访问过的一个或多个小区的标识可以为CGI，PCI等。
在一种可能的实现方式中，在上述实现方式中，该方法还包括：该网络设备向核心网设备发送第二信息。具体地，该网络设备还可以向核心网设备发送用于指示该终端设备访问过的一个或多个小区的第二信息，以便于该核心网设备与该网络设备对齐两者对该第二信息的理解，以期减少通信出错的可能性。
在一种可能的实现方式中，在步骤S501之前，该方法还包括：该终端设备发送第一能力信息，该第一能力信息指示该终端设备支持寻呼提前指示PEI。具体地，终端设备可以向网络设备发送指示该终端设备支持PEI的第一能力信息，以便于该网络设备基于该第一能力信息明确该终端设备支持PEI并基于PEI机制与该终端设备通信。
在一种可能的实现方式中，在图5所示实施例中(任意步骤之前或之后)，该方法还包括：该终端设备接收第三指示信息，该第三指示信息指示该网络设备支持PEI。具体地，网络设备可以向终端设备发送指示该网络设备支持PEI的第三指示信息，以便于该终端设备基于该第三指示信息明确该网络设备支持PEI并基于PEI机制与该网络设备通信。
可选地，除了上述第一能力信息和第三指示信息交互的实现方式，终端设备和网络设备还可以通过其它实现方式获知对端的能力信息。例如，通过其它设备之间的交互的实现方式，该其他设备可以为核心网设备、侧行链路(sidelink)设备，服务器等。又如，通过协议/标准预配置的实现方式。
S504.终端设备和网络设备之间释放RRC连接。
本实施例中，网络设备在步骤S501中发送第一消息之后，该网络设备在步骤S504中释放与该终端设备之间的RRC连接。终端设备在步骤S501中接收第一消息之后，该终端设备在步骤S504中释放与该网络设备之间的RRC连接。
需要说明的是，步骤S502和步骤S504的执行过程均在步骤S501之后，但是本实施例中对步骤S502和步骤S504的执行顺序不做限定。例如，步骤S502可以在步骤S504之后执行，或者，步骤S504可以在步骤S502之后执行。
类似地，若网络设备执行步骤S503的情况下，步骤S503和步骤S504的执行过程均在步骤S501之后，但是本实施例中对步骤S503和步骤S504的执行顺序不做限定。例如，步骤S503可以在步骤S504之后执行，或者，步骤S504可以在步骤S503之后执行。
基于图5技术方案，终端设备可以维护用于指示该终端设备最后使用的小区的第一信息。其中，终端设备在步骤S501中接收指示释放该终端设备与网络设备之间的RRC连接的第一消息并在步骤S504中释放该RRC连接的场景中，该终端设备与该网络设备之间的接入层安全未激活的情况下，该终端设备在步骤S502中确定不忽略该第一消息中的第一指示信息，或者，该终端设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息。其中，在该接入层安全未激活的情况下，终端设备可以确定无法基于接入层安全机制与该网络设备之间进行通信。从而，该终端设备确定不忽略该第一消息中的第一指示信息(或者，该终端设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息)的方式，使得该终端设备不会基于发送该第一消息的小区(该小区位于该网络设备对应的一个或多个小 区中)更新第一信息，可以避免由于终端设备误更新导致寻呼错误的情况出现，以增强终端设备基于该第一信息实现的PEI功能并降低该终端设备的功耗。
此外，终端设备在步骤S502中确定不忽略该第一消息中的第一指示信息(或者，该终端设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息)的方式，还可以使得终端设备和网络设备之间对齐两者对该第一指示信息的理解，以期减少通信出错的可能性。
请参阅图6，为本申请提供的通信方法的一个实现示意图。
需要说明的是，在图6中，步骤S601和步骤S604的实现过程可以参考前述图4中步骤S401和步骤S404的实现过程，并实现相应的技术效果，后文将不做详述。
S601.网络设备发送第一消息。
本实施例中，网络设备在步骤S601中发送第一消息，相应的，终端设备在步骤S601中接收该第一消息。其中，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制(radio resource control，RRC)连接。
S602.终端设备根据第一消息处理第一信息。
本实施例中，终端设备与该网络设备之间的接入层(access stratum，AS)安全未激活的情况下，终端设备在步骤S602中根据该第一消息处理第一信息。其中，该第一信息用于指示该终端设备最后使用的小区。
在一种可能的实现方式中，在步骤S602中，该终端设备根据该第一消息处理第一信息包括：在该第一消息包括第一指示信息的情况下，该终端设备确定不更新该第一信息，该第一指示信息用于指示不更新该第一信息。具体地，在该第一消息包括指示不更新该第一信息的第一指示信息的情况下，该终端设备确定不更新该第一信息，使得该终端设备基于网络设备的指示执行相应的操作，以期减少通信出错的可能性。
在一种可能的实现方式中，在步骤S602中，该终端设备根据该第一消息处理第一信息包括：在该第一消息不包括第一指示信息的情况下，该终端设备基于该第一消息对应的小区更新该第一信息，该第一指示信息用于指示不更新该第一信息。具体地，在该第一消息不包括第一指示信息的情况下，该终端设备基于该第一消息对应的小区更新该第一信息，使得该终端设备基于网络设备的指示执行相应的操作，以期减少通信出错的可能性。
应理解，该终端设备基于该第一消息对应的小区更新该第一信息的过程包括：该终端设备基于发送该第一消息的小区的小区标识更新该第一信息，或者，该终端设备基于该第一消息携带的小区标识更新该第一信息，此处不做限定。例如，在上述实施例中，终端设备基于发送该第一消息的小区的小区标识更新该第一信息，换言之，终端设备将第一信息所指示的最后使用的小区信息更新为发送该第一消息的小区的小区标识。
在一种可能的实现方式中，该第一信息包括该终端设备最后使用的小区信息。可选地，该第一信息可以包括该终端设备最后使用的小区的标识，例如该标识可以为CGI，PCI等。
在一种可能的实现方式中，在满足以下任一项时，该终端设备在步骤S602中确定该终端设备与该网络设备之间的接入层安全未激活，包括：该终端设备确定未接收到安全模式命令消息；该终端设备接收该安全模式命令消息之后，该终端设备确定基于该安全模式命令消息推演密钥的过程失败；或，该终端设备接收该安全模式命令消息之后，该终端设备确定该安全模式命令消息对应的完整性保护校验未通过。具体地，终端设备可以通过上述多种方式确定该终端设备与该网络设备之间的接入层安全未激活，以提升方案实现的灵活性。
上面描述了在该终端设备与该网络设备之间的接入层安全未激活的情况下，该终端设备在步骤S602中可能执行的实现过程，下面将通过对该情况下，网络设备可能执行的实现过程进行示例性描述。
在一种可能的实现方式中，网络设备在步骤S601中发送第一消息之后，该网络设备根据该第一消息确定该终端设备是否更新该第一信息。具体地，该网络设备还可以根据该第一消息确定该终端设备是否更新该第一信息，以便于该网络设备明确该终端设备的行为，以期避免通信出错。
在一种可能的实现方式中，在网络设备在步骤S601中已发送第一消息且终端设备与该网络设备之间的接入层安全未激活的情况下，在步骤S603中，该网络设备根据该第一消息处理第二信息，该第二信息用于指示该终端设备访问过的一个或多个小区。
具体地，网络设备可以维护用于指示该终端设备访问过的一个或多个小区的第二信息。其中，网络设备在发送指示释放该终端设备与网络设备之间的RRC连接的第一消息并释放该RRC连接的场景中，该网络设备根据该第一消息处理第二信息。其中，在该接入层安全未激活的情况下，网络设备可以确定无法基于接入层安全机制与该网络设备之间进行通信。从而，该网络设备根据该第一消息处理第一信息的方式，使得终端设备和网络设备之间对齐两者对该第一消息的理解，以期减少通信出错的可能性。
可选地，类似于前述终端设备在步骤S602的实现过程，该网络设备根据该第一消息处理第二信息包括：在该第一消息包括第一指示信息的情况下，该网络设备确定不更新该第二信息，该第一指示信息用于指示不更新第一信息，该第一信息用于指示该终端设备最后使用的小区信息。具体地，在该第一消息包括指示不更新该第一信息的第一指示信息的情况下，该网络设备确定不更新该第二信息，使得后续终端设备基于网络设备的指示执行相应的操作，以期减少通信出错的可能性。
可选地，类似于前述终端设备在步骤S602的实现过程，该终端设备根据该第一消息处理第一信息包括：在该第一消息不包括第一指示信息的情况下，该终端设备基于该第一消息对应的小区更新该第二信息，该第一指示信息用于指示不更新该第一信息，该第一信息用于指示该终端设备最后使用的小区信息。具体地，在该第一消息不包括第一指示信息的情况下，该网络设备基于该第一消息对应的小区更新该第二信息，使得后续终端设备基于网络设备的指示执行相应的操作，以期减少通信出错的可能性。
应理解，该网络设备基于该第一消息对应的小区更新该第二信息的过程包括：该网络设备基于发送该第一消息的小区的小区标识更新该第二信息，或者，该网络设备基于该第一消息携带的小区标识更新该第二信息，此处不做限定。
在一种可能的实现方式中，该方法还包括：该网络设备向核心网设备发送第二信息。具体地，该网络设备还可以向核心网设备发送用于指示该终端设备访问过的一个或多个小区的第二信息，以便于该核心网设备与该网络设备对齐两者对该第二信息的理解，以期减少通信出错的可能性。
在一种可能的实现方式中，在步骤S601之前，该方法还包括：该终端设备发送第一能力信息，该第一能力信息指示该终端设备支持PEI。具体地，终端设备可以向网络设备发送指示该终端设备支持PEI的第一能力信息，以便于该网络设备基于该第一能力信息明确该终端设备支持PEI并基于PEI机制与该终端设备通信。
在一种可能的实现方式中，在图6所示实施例中(任意步骤之前或之后)，该方法还包括：该终端设备接收第三指示信息，该第三指示信息指示该网络设备支持PEI。具体地，网络设备可以向终端设备发送指示该网络设备支持PEI的第三指示信息，以便于该终端设备基于该第三指示信息明确该网络设备支持PEI并基于PEI机制与该网络设备通信。
可选地，除了上述第一能力信息和第三指示信息交互的实现方式，终端设备和网络设备还可以通过其它实现方式获知对端的能力信息。例如，通过其它设备之间的交互的实现方式，该其他设备可以为核心网设备、侧行链路(sidelink)设备，服务器等。又如，通过协议/标准预配置的实现方式。
S604.终端设备和网络设备之间释放RRC连接。
本实施例中，网络设备在步骤S601中发送第一消息之后，该网络设备在步骤S604中释放与该终端设备之间的RRC连接。终端设备在步骤S601中接收第一消息之后，该终端设备在步骤S604中释放与该网络设备之间的RRC连接。
需要说明的是，步骤S602和步骤S604的执行过程均在步骤S601之后，但是本实施例中对步骤S602和步骤S604的执行顺序不做限定。例如，步骤S602可以在步骤S604之后执行，或者，步骤S604可以在步骤S602之后执行。
类似地，若网络设备执行步骤S603的情况下，步骤S603和步骤S604的执行过程均在步骤S601之后，但是本实施例中对步骤S603和步骤S604的执行顺序不做限定。例如，步骤S603可以在步骤S604之后执行，或者，步骤S604可以在步骤S603之后执行。
基于图6所示技术方案，终端设备可以维护用于指示该终端设备最后使用的小区的第一信息。其中，终端设备在步骤S601中接收指示释放该终端设备与网络设备之间的RRC连接的第一消息并在步骤S604中释放该RRC连接的场景中，该终端设备在步骤S602中根据该第一消息处理第一信息。其中，在该接入层安全未激活的情况下，终端设备可以确定无法基于接入层安全机制与该网络设备之间进行通信。从而，该终端设备根据该第一消息处理第一信息的方式，使得终端设备和网络设备之间对齐两者对该第一消息的理解，以期减少通信出错的可能性。
由上述图4至图6所示实现过程可知，在图4所示实现方式中，AS安全未激活时，终端设备忽略第一消息中的第一指示信息，且不更新第一信息，这样就不会将第一信息更新为不合适的小区，以期增强UE的PEI功能并节省能耗。在图5和图6所示实现方式中，在AS安全未激活时，不忽略第一消息中的第一指示信息，仍根据第一消息中的第一指示信息确定不更新第一信息，这样就不会将第一信息更新为不合适的小区，以期增强终端设备的PEI功能并节省能耗。
下面将结合图7所示实现过程，对上述图4所示实施例进行示例性描述，并结合图8所示实现过程，对上述图5和图6所示实施例进行示例性描述。
应理解，在图7和图8所示实现示例中，以第一消息为RRCRelease消息，第一消息中的第一指示信息为noLastCellUpdate信元/字段/域/参数，第一信息为last used cell信元/字段/域/参数为例进行说明。
如图7所示，作为前述图4所示实施例的一种实现示例，该实现示例包括如下过程。
1.如果AS安全已激活，则支持PEI能力的终端设备根据空口RRCRelease消息中noLastCellUpdate来更新last used cell：
若不包含noLastCellUpdate，则该终端设备更新last used cell为当前小区。
若包含noLastCellUpdate，则该终端设备不更新last used cell。
2.如果AS安全未激活，则该终端设备直接忽略noLastCellUpdate信元，不更新last used cell。
基于图7所示实施例可知，在前述图3a所示场景一中，终端设备接收伪基站下收到空口RRCRelease消息后，由于AS安全未激活，可以避免last used cell被更新为伪基站小区。在前述图3b所示场景二中，在接入网网元或者核心网网元临时过载的场景下，由于接入网网元或者核心网网元之间无法建连接，导致AS安全未激活，收到空口RRCRelease消息后，以避免last used cell被更新为过载基站下面的小区。从而，可以增强终端设备的PEI功能和保证该终端设备的节电性能。并且，在AS安全未激活时，终端设备就直接忽略noLastCellUpdate，不更新last used cell，这样就不会将last used cell更新为不合适的小区。
如图8所示，作为前述图5和图6所示实施例的一种实现示例，该实现示例包括如下过程。
1.如果AS安全已激活，则支持PEI能力的终端设备根据空口RRCRelease消息中noLastCellUpdate来更新last used cell：
若不包含noLastCellUpdate，则该终端设备更新last used cell为当前小区。
若包含noLastCellUpdate，则该终端设备不更新last used cell。
2.如果AS安全未激活，则不忽略空口RRCRelease消息中noLastCellUpdate信元，仍根据它来更新last used cell：
若不包含noLastCellUpdate，则该终端设备更新last used cell为当前小区。
若包含noLastCellUpdate，则该终端设备不更新last used cell。
基于图8所示实施例可知，在前述图3b所示场景二中，在接入网网元或者核心网网元临时过载的场景下，由于接入网网元或者核心网网元之间无法建连接，导致AS安全未激活，收到空口RRCRelease消息后，以避免last used cell被更新为过载基站下面的小区。从而，可以增强终端设备的PEI功能和保证该终端设备的节电性能。并且，在AS安全未激活时，终端设备不忽略noLastCellUpdate，仍根据noLastCellUpdate来更新last used cell，这样就不会因为gNB或核心网因为临时过载，将last used cell更新为不合适的小区。
上面从方法的角度对本申请进行介绍，下面将对本申请提供的通信装置进行描述。
请参阅图9，本申请实施例提供了一种通信装置900，该通信装置900可以实现上述方法实施例中终端设备或网络设备的功能，因此也能实现上述方法实施例所具备的有益效果。在本申请实施例中，该通信装置900可以是终端设备或网络设备，也可以是终端设备或网络设备内部的集成电路或者元件等，例如芯片。下文实施例以该通信装置900为终端设备或网络设备为例进行说明。
一种可能的实现方式中，当该装置900为用于执行前述实施例中终端设备所执行的方法时，该装置包括处理单元901和收发单元902；在该收发单元902接收到第一消息且该终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元901确定不更新第一信息，该第一信息用于指示该终端设备最后使用的小区，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接；该处理单元901释放该RRC连接。
在一种可能的实现方式中，该第一消息包含第一指示信息，该第一指示信息用于指示不更新该第一信息；在该终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元901还用于忽略该第一指示信息。
在一种可能的实现方式中，该第一消息包括第二指示信息，该第二指示信息用于指示接入网络的等待时间；该处理单元901还用于忽略该第一消息中除该第二指示信息之外的至少一个信息，该至少一个信息包括第一指示信息，该第一指示信息用于指示不更新该第一信息。
在一种可能的实现方式中，该第一信息包括该终端设备最后使用的小区信息。
在一种可能的实现方式中，在满足以下任一项时，该处理单元901确定该终端设备与该网络设备之间的接入层安全未激活，包括：该处理单元901确定未接收到安全模式命令消息；在该收发单元902接收该安全模式命令消息之后，该处理单元901确定基于该安全模式命令消息推演密钥的过程失败；或，在该收发单元902接收该安全模式命令消息之后，该处理单元901确定该安全模式命令消息对应的完整性保护校验未通过。
在一种可能的实现方式中，该收发单元902还用于发送第一能力信息，该第一能力信息指示该终端设备支持寻呼提前指示PEI。
在一种可能的实现方式中，该收发单元902还用于接收第三指示信息，该第三指示信息指示该网络设备支持PEI。
一种可能的实现方式中，当该装置900为用于执行前述实施例中网络设备所执行的方法时，该装置包括处理单元901和收发单元902；在该收发单元902已发送第一消息且终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元901确定不更新第二信息，该第二信息用于指示该终端设备访问过的一个或多个小区，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接；该处理单元901释放该RRC连接。
在一种可能的实现方式中，该第一消息包含第一指示信息，该第一指示信息用于指示不更新第一信息，该第一信息用于指示该终端设备最后使用的小区；在该终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元901确定该终端设备忽略该第一指示信息。
在一种可能的实现方式中，该第一消息包括第二指示信息，该第二指示信息用于指示接入网络的等待时间；在该终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元901确定该终端设备忽略该第一消息中除该第二指示信息之外的至少一个信息，该至少一个信息包括第一指示信息，该第一指示信息用于指示不更新第一信息，该第一信息用于指示该终端设备最后使用的小区。
在一种可能的实现方式中，在该终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元901确定该终端设备不更新第一信息，该第一信息用于指示该终端设备最后使用的小区。
在一种可能的实现方式中，该第一信息包括该终端设备最后使用的小区信息。
在一种可能的实现方式中，该第二信息包括该终端设备访问过的一个或多个小区的标识。
在一种可能的实现方式中，该收发单元902还用于向核心网设备发送该第二信息。
在一种可能的实现方式中，该收发单元902还用于发送第三指示信息，该第三指示信息指示该网络设备支持PEI。
一种可能的实现方式中，当该装置900为用于执行前述实施例中终端设备所执行的方法时，该装置包括处理单元901和收发单元902；在该收发单元902接收到第一消息且该终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元901确定不忽略该第一消息中的第一指示信息，或者，该处理单元901忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息；其中，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接，该第一指示信息用于指示不更新第一信息，该第一信息用于指示该终端设备最后使用的小区，该第二指示信息用于指示接入网络的等待时间；该处理单元901释放该RRC连接。
在一种可能的实现方式中，该处理单元901还用于根据第一指示信息确定不更新该第一信息。
在一种可能的实现方式中，该第一信息包括该终端设备最后使用的小区信息。
在一种可能的实现方式中，在满足以下任一项时，该处理单元901确定该终端设备与该网络设备之间的接入层安全未激活，包括：该处理单元901确定未接收到安全模式命令消息；在该收发单元902接收该安全模式命令消息之后，该处理单元901确定基于该安全模式命令消息推演密钥的过程失败；或，在该收发单元902接收该安全模式命令消息之后，该处理单元901确定该安全模式命令消息对应的完整性保护校验未通过。
在一种可能的实现方式中，该收发单元902还用于发送第一能力信息，该第一能力信息指示该终端设备支持寻呼提前指示PEI。
在一种可能的实现方式中，该收发单元902还用于接收第三指示信息，该第三指示信息指示该网络设备支持PEI。
一种可能的实现方式中，当该装置900为用于执行前述实施例中网络设备所执行的方法时，该装置包括处理单元901和收发单元902；在该收发单元902已发送第一消息且终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元901确定不忽略该第一消息中的第一指示信息，或者，该处理单元901忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息；其中，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接，该第一指示信息用于指示不更新第一信息，该第一信息用于指示该终端设备最后使用的小区，该第二指示信息用于指示接入网络的等待时间；该处理单元901释放该RRC连接。
在一种可能的实现方式中，该处理单元901还用于根据该第一指示信息确定不更新第二信息，该第二信息用于该终端设备访问过的一个或多个小区。
在一种可能的实现方式中，该第二信息包括该终端设备访问过的一个或多个小区的标识。
在一种可能的实现方式中，该第一信息包括该终端设备最后使用的小区信息。
在一种可能的实现方式中，在该终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元901确定该终端设备不忽略该第一消息中的第一指示信息，或者，该处理单元901确定该终端设备忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息。
在一种可能的实现方式中，该收发单元902还用于向核心网设备发送第二信息。
在一种可能的实现方式中，该收发单元902还用于接收第一能力信息，该第一能力信息指示该终端设备支持寻呼提前指示PEI。
在一种可能的实现方式中，该收发单元902还用于发送第三指示信息，该第三指示信息指示该网络设备支持PEI。
一种可能的实现方式中，当该装置900为用于执行前述实施例中终端设备所执行的方法时，该装置包括处理单元901和收发单元902；在该收发单元902接收到第一消息且该终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元901根据该第一消息处理第一信息，该第一信息用于指示该终 端设备最后使用的小区信息，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接；该处理单元901释放该RRC连接。
在一种可能的实现方式中，该处理单元901根据该第一消息处理第一信息包括：在该第一消息包括第一指示信息的情况下，该处理单元901确定不更新该第一信息，该第一指示信息用于指示不更新该第一信息。
在一种可能的实现方式中，该处理单元901根据该第一消息处理第一信息包括：在该第一消息不包括第一指示信息的情况下，该处理单元901基于该第一消息对应的小区更新该第一信息，该第一指示信息用于指示不更新该第一信息。
在一种可能的实现方式中，该第一信息包括该终端设备最后使用的小区信息。
在一种可能的实现方式中，在满足以下任一项时，该处理单元901确定该终端设备与该网络设备之间的接入层安全未激活，包括：该处理单元901确定未接收到安全模式命令消息；在该收发单元902接收该安全模式命令消息之后，该处理单元901确定基于该安全模式命令消息推演密钥的过程失败；或，在该收发单元902接收该安全模式命令消息之后，该处理单元901确定该安全模式命令消息对应的完整性保护校验未通过。
在一种可能的实现方式中，该收发单元902还用于发送第一能力信息，该第一能力信息指示该终端设备支持寻呼提前指示PEI。
在一种可能的实现方式中，该收发单元902还用于接收第三指示信息，该第三指示信息指示该网络设备支持PEI。
一种可能的实现方式中，当该装置900为用于执行前述实施例中网络设备所执行的方法时，该装置包括处理单元901和收发单元902；在该收发单元902已发送第一消息且终端设备与该网络设备之间的接入层安全未激活的情况下，该处理单元901根据该第一消息处理第二信息，该第二信息用于指示该终端设备访问过的一个或多个小区，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接；该处理单元901释放该RRC连接。
在一种可能的实现方式中，该处理单元901根据该第一消息处理第二信息包括：在该第一消息包括第一指示信息的情况下，该处理单元901确定不更新该第二信息，该第一指示信息用于指示不更新第一信息，该第一信息用于指示该终端设备最后使用的小区信息。
在一种可能的实现方式中，该处理单元901根据该第一消息处理第一信息包括：在该第一消息不包括第一指示信息的情况下，该处理单元901基于该第一消息对应的小区更新该第二信息，该第一指示信息用于指示不更新该第一信息，该第一信息用于指示该终端设备最后使用的小区信息。
在一种可能的实现方式中，该第一信息包括该终端设备最后使用的小区信息。
在一种可能的实现方式中，该第二信息包括该终端设备访问过的一个或多个小区的标识。
在一种可能的实现方式中，该处理单元901根据该第一消息确定该终端设备是否更新该第一信息。
在一种可能的实现方式中，该收发单元902还用于接收第一能力信息，该第一能力信息指示该终端设备支持寻呼提前指示PEI。
在一种可能的实现方式中，该收发单元902还用于发送第三指示信息，该第三指示信息指示该网络设备支持PEI。
需要说明的是，上述通信装置900的单元的信息执行过程等内容，具体可参见本申请前述所示的方法实施例中的叙述，此处不再赘述。
请参阅图10，为本申请提供的通信装置1000的另一种示意性结构图，通信装置1000至少包括输入输出接口1002。其中，通信装置1000可以为芯片或集成电路。
可选的，该通信装置还包括逻辑电路1001。
其中，图9所示收发单元902可以为通信接口，该通信接口可以是图10中的输入输出接口1002，该输入输出接口1002可以包括输入接口和输出接口。或者，该通信接口也可以是收发电路，该收发电路可以包括输入接口电路和输出接口电路。
可选的，该通信装置1000为前述实施例中终端设备(或设备中的部件)的情况下，在该输入输出接口1002接收到第一消息且该终端设备与该网络设备之间的接入层安全未激活的情况下，该逻辑电路1001确定不更新第一信息，该第一信息用于指示该终端设备最后使用的小区，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接；该逻辑电路1001释放该RRC连接。
可选的，该通信装置1000为前述实施例中网络设备(或设备中的部件)的情况下，在该输入输出接口1002已发送第一消息且终端设备与该网络设备之间的接入层安全未激活的情况下，该逻辑电路1001确定不更新第二信息，该第二信息用于指示该终端设备访问过的一个或多个小区，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接；该逻辑电路1001释放该RRC连接。
可选地，该通信装置1000为前述实施例中终端设备(或设备中的部件)的情况下，在该输入输出接口1002接收到第一消息且该终端设备与该网络设备之间的接入层安全未激活的情况下，该逻辑电路1001确定不忽略该第一消息中的第一指示信息，或者，该逻辑电路1001忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息；其中，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接，该第一指示信息用于指示不更新第一信息，该第一信息用于指示该终端设备最后使用的小区，该第二指示信息用于指示接入网络的等待时间；该逻辑电路1001释放该RRC连接。
可选地，该通信装置1000为前述实施例中网络设备(或设备中的部件)的情况下，在该输入输出接口1002已发送第一消息且终端设备与该网络设备之间的接入层安全未激活的情况下，该逻辑电路1001确定不忽略该第一消息中的第一指示信息，或者，该逻辑电路1001忽略该第一消息中除第一指示信息和第二指示信息之外的至少一个信息；其中，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接，该第一指示信息用于指示不更新第一信息，该第一信息用于指示该终端设备最后使用的小区，该第二指示信息用于指示接入网络的等待时间；该逻辑电路1001释放该RRC连接。
可选地，该通信装置1000为前述实施例中终端设备(或设备中的部件)的情况下，在该输入输出接口1002接收到第一消息且该终端设备与该网络设备之间的接入层安全未激活的情况下，该逻辑电路1001根据该第一消息处理第一信息，该第一信息用于指示该终端设备最后使用的小区信息，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接；该逻辑电路1001释放该RRC连接。
可选地，该通信装置1000为前述实施例中网络设备(或设备中的部件)的情况下，在该输入输出接口1002已发送第一消息且终端设备与该网络设备之间的接入层安全未激活的情况下，该逻辑电路1001根据该第一消息处理第二信息，该第二信息用于指示该终端设备访问过的一个或多个小区，该第一消息用于指示释放该终端设备与网络设备之间的无线资源控制RRC连接；该逻辑电路1001释放该RRC连接。
其中，逻辑电路1001和输入输出接口1002还可以执行任一实施例中网络设备执行的其他步骤并实现对应的有益效果，此处不再赘述。
在一种可能的实现方式中，图9所示处理单元901可以为图10中的逻辑电路1001。
可选的，逻辑电路1001可以是一个处理装置，处理装置的功能可以部分或全部通过软件实现。其中，处理装置的功能可以部分或全部通过软件实现。
可选的，处理装置可以包括存储器和处理器，其中，存储器用于存储计算机程序，处理器读取并执行存储器中存储的计算机程序，以执行任意一个方法实施例中的相应处理和/或步骤。
可选地，处理装置可以仅包括处理器。用于存储计算机程序的存储器位于处理装置之外，处理器通过电路/电线与存储器连接，以读取并执行存储器中存储的计算机程序。其中，存储器和处理器可以集成在一起，或者也可以是物理上互相独立的。
可选地，该处理装置可以是一个或多个芯片，或一个或多个集成电路。例如，处理装置可以是一个或多个现场可编程门阵列(field-programmable gate array，FPGA)、专用集成芯片(application specific integrated circuit，ASIC)、系统芯片(system on chip，SoC)、中央处理器(central processor unit，CPU)、网络处理器(network processor，NP)、数字信号处理电路(digital signal processor， DSP)、微控制器(micro controller unit，MCU)，可编程控制器(programmable logic device，PLD)或其它集成芯片，或者上述芯片或者处理器的任意组合等。
请参阅图11，为本申请的实施例提供的上述实施例中所涉及的通信装置1100，该通信装置1100具体可以为上述实施例中的作为终端设备的通信装置，图11所示示例为终端设备通过终端设备(或者终端设备中的部件)实现。
其中，该通信装置1100的一种可能的逻辑结构示意图，该通信装置1100可以包括但不限于至少一个处理器1101以及通信端口1102。
进一步可选的，该装置还可以包括存储器1103、总线1104中的至少一个，在本申请的实施例中，该至少一个处理器1101用于对通信装置1100的动作进行控制处理。
此外，处理器1101可以是中央处理器单元，通用处理器，数字信号处理器，专用集成电路，现场可编程门阵列或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。该处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，数字信号处理器和微处理器的组合等等。所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
需要说明的是，图11所示通信装置1100具体可以用于实现前述方法实施例中终端设备所实现的步骤，并实现终端设备对应的技术效果，图11所示通信装置的具体实现方式，均可以参考前述方法实施例中的叙述，此处不再一一赘述。
请参阅图12，为本申请的实施例提供的上述实施例中所涉及的通信装置1200的结构示意图，该通信装置1200具体可以为上述实施例中的作为网络设备的通信装置，图12所示示例为网络设备通过网络设备(或者网络设备中的部件)实现，其中，该通信装置的结构可以参考图12所示的结构。
通信装置1200包括至少一个处理器1211以及至少一个网络接口1214。进一步可选的，该通信装置还包括至少一个存储器1212、至少一个收发器1213和一个或多个天线1215。处理器1211、存储器1212、收发器1213和网络接口1214相连，例如通过总线相连，在本申请实施例中，该连接可包括各类接口、传输线或总线等，本实施例对此不做限定。天线1215与收发器1213相连。网络接口1214用于使得通信装置通过通信链路，与其它通信设备通信。例如网络接口1214可以包括通信装置与核心网设备之间的网络接口，例如S1接口，网络接口可以包括通信装置和其他通信装置(例如其他网络设备或者核心网设备)之间的网络接口，例如X2或者Xn接口。
处理器1211主要用于对通信协议以及通信数据进行处理，以及对整个通信装置进行控制，执行软件程序，处理软件程序的数据，例如用于支持通信装置执行实施例中所描述的动作。通信装置可以包括基带处理器和中央处理器，基带处理器主要用于对通信协议以及通信数据进行处理，中央处理器主要用于对整个终端设备进行控制，执行软件程序，处理软件程序的数据。图12中的处理器1211可以集成基带处理器和中央处理器的功能，本领域技术人员可以理解，基带处理器和中央处理器也可以是各自独立的处理器，通过总线等技术互联。本领域技术人员可以理解，终端设备可以包括多个基带处理器以适应不同的网络制式，终端设备可以包括多个中央处理器以增强其处理能力，终端设备的各个部件可以通过各种总线连接。该基带处理器也可以表述为基带处理电路或者基带处理芯片。该中央处理器也可以表述为中央处理电路或者中央处理芯片。对通信协议以及通信数据进行处理的功能可以内置在处理器中，也可以以软件程序的形式存储在存储器中，由处理器执行软件程序以实现基带处理功能。
存储器主要用于存储软件程序和数据。存储器1212可以是独立存在，与处理器1211相连。可选的，存储器1212可以和处理器1211集成在一起，例如集成在一个芯片之内。其中，存储器1212能够存储执行本申请实施例的技术方案的程序代码，并由处理器1211来控制执行，被执行的各类计算机程序代码也可被视为是处理器1211的驱动程序。
图12仅示出了一个存储器和一个处理器。在实际的终端设备中，可以存在多个处理器和多个存储器。存储器也可以称为存储介质或者存储设备等。存储器可以为与处理器处于同一芯片上的存储元件，即片内存储元件，或者为独立的存储元件，本申请实施例对此不做限定。
收发器1213可以用于支持通信装置与终端之间射频信号的接收或者发送，收发器1213可以与天线1215相连。收发器1213包括发射机Tx和接收机Rx。具体地，一个或多个天线1215可以接收射频信号，该收发器1213的接收机Rx用于从天线接收该射频信号，并将射频信号转换为数字基带信号或数字中频信号，并将该数字基带信号或数字中频信号提供给该处理器1211，以便处理器1211对该数字基带信号或数字中频信号做进一步的处理，例如解调处理和译码处理。此外，收发器1213中的发射机Tx还用于从处理器1211接收经过调制的数字基带信号或数字中频信号，并将该经过调制的数字基带信号或数字中频信号转换为射频信号，并通过一个或多个天线1215发送该射频信号。具体地，接收机Rx可以选择性地对射频信号进行一级或多级下混频处理和模数转换处理以得到数字基带信号或数字中频信号，该下混频处理和模数转换处理的先后顺序是可调整的。发射机Tx可以选择性地对经过调制的数字基带信号或数字中频信号时进行一级或多级上混频处理和数模转换处理以得到射频信号，该上混频处理和数模转换处理的先后顺序是可调整的。数字基带信号和数字中频信号可以统称为数字信号。
收发器1213也可以称为收发单元、收发机、收发装置等。可选的，可以将收发单元中用于实现接收功能的器件视为接收单元，将收发单元中用于实现发送功能的器件视为发送单元，即收发单元包括接收单元和发送单元，接收单元也可以称为接收机、输入口、接收电路等，发送单元可以称为发射机、发射器或者发射电路等。
需要说明的是，图12所示通信装置1200具体可以用于实现前述方法实施例中网络设备所实现的步骤，并实现网络设备对应的技术效果，图12所示通信装置1200的具体实现方式，均可以参考前述方法实施例中的叙述，此处不再一一赘述。
本申请实施例还提供一种存储一个或多个计算机执行指令的计算机可读存储介质，当计算机执行指令被处理器执行时，该处理器执行如前述实施例中终端设备可能的实现方式所述的方法。
本申请实施例还提供一种存储一个或多个计算机执行指令的计算机可读存储介质，当计算机执行指令被处理器执行时，该处理器执行如前述实施例中网络设备可能的实现方式所述的方法。
本申请实施例还提供一种存储一个或多个计算机的计算机程序产品(或称计算机程序)，当计算机程序产品被该处理器执行时，该处理器执行上述终端设备可能实现方式的方法。
本申请实施例还提供一种存储一个或多个计算机的计算机程序产品，当计算机程序产品被该处理器执行时，该处理器执行上述网络设备可能实现方式的方法。
本申请实施例还提供了一种芯片系统，该芯片系统包括至少一个处理器，用于支持通信装置实现上述通信装置可能的实现方式中所涉及的功能。可选的，所述芯片系统还包括接口电路，所述接口电路为所述至少一个处理器提供程序指令和/或数据。在一种可能的设计中，该芯片系统还可以包括存储器，存储器，用于保存该通信装置必要的程序指令和数据。该芯片系统，可以由芯片构成，也可以包含芯片和其他分立器件，其中，该通信装置具体可以为前述方法实施例中终端设备。
本申请实施例还提供了一种芯片系统，该芯片系统包括至少一个处理器，用于支持通信装置实现上述通信装置可能的实现方式中所涉及的功能。可选的，所述芯片系统还包括接口电路，所述接口电路为所述至少一个处理器提供程序指令和/或数据。在一种可能的设计中，芯片系统还可以包括存储器，存储器，用于保存该通信装置必要的程序指令和数据。该芯片系统，可以由芯片构成，也可以包含芯片和其他分立器件，其中，该通信装置具体可以为前述方法实施例中网络设备。
本申请实施例还提供了一种通信系统，该通信系统包括上述任一实施例中的终端设备和网络设备。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。

Claims (24)

  1. 一种通信方法，其特征在于，包括：
    在终端设备接收到第一消息且所述终端设备与所述网络设备之间的接入层安全未激活的情况下，确定不更新第一信息，所述第一信息用于指示所述终端设备最后使用的小区，所述第一消息用于指示释放所述终端设备与网络设备之间的无线资源控制RRC连接；
    释放所述RRC连接。
  2. 根据权利要求1所述的方法，其特征在于，所述第一消息包含第一指示信息，所述第一指示信息用于指示不更新所述第一信息；所述方法还包括：
    在所述终端设备与所述网络设备之间的接入层安全未激活的情况下，忽略所述第一指示信息。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一消息包括第二指示信息，所述第二指示信息用于指示接入网络的等待时间；所述方法还包括：
    忽略所述第一消息中除所述第二指示信息之外的至少一个信息，所述至少一个信息包括第一指示信息，所述第一指示信息用于指示不更新所述第一信息。
  4. 根据权利要求1至3任一项所述的方法，其特征在于，所述第一信息包括所述终端设备最后使用的小区信息。
  5. 一种通信方法，其特征在于，包括：
    在网络设备已发送第一消息且终端设备与所述网络设备之间的接入层安全未激活的情况下，确定不更新第二信息，所述第二信息用于指示所述终端设备访问过的一个或多个小区，所述第一消息用于指示释放所述终端设备与网络设备之间的无线资源控制RRC连接；
    释放所述RRC连接。
  6. 根据权利要求5所述的方法，其特征在于，所述第一消息包含第一指示信息，所述第一指示信息用于指示不更新第一信息，所述第一信息用于指示所述终端设备最后使用的小区；所述方法还包括：
    在所述终端设备与所述网络设备之间的接入层安全未激活的情况下，确定所述终端设备忽略所述第一指示信息。
  7. 根据权利要求5或6所述的方法，其特征在于，所述第一消息包括第二指示信息，所述第二指示信息用于指示接入网络的等待时间；所述方法还包括：
    在所述终端设备与所述网络设备之间的接入层安全未激活的情况下，确定所述终端设备忽略所述第一消息中除所述第二指示信息之外的至少一个信息，所述至少一个信息包括第一指示信息，所述第一指示信息用于指示不更新第一信息，所述第一信息用于指示所述终端设备最后使用的小区。
  8. 根据权利要求5至7任一项所述的方法，其特征在于，所述方法还包括：
    在所述终端设备与所述网络设备之间的接入层安全未激活的情况下，确定所述终端设备不更新第一信息，所述第一信息用于指示所述终端设备最后使用的小区。
  9. 根据权利要求5至8任一项所述的方法，其特征在于，所述第一信息包括所述终端设备最后使用的小区信息。
  10. 根据权利要求5至9任一项所述的方法，其特征在于，所述第二信息包括所述终端设备访问过的一个或多个小区的标识。
  11. 一种通信方法，其特征在于，包括：
    在终端设备接收到第一消息且所述终端设备与所述网络设备之间的接入层安全未激活的情况下，确定不忽略所述第一消息中的第一指示信息，或者，忽略所述第一消息中除第一指示信息和第二指示信息之外的至少一个信息；
    其中，所述第一消息用于指示释放所述终端设备与网络设备之间的无线资源控制RRC连接，所述第一指示信息用于指示不更新第一信息，所述第一信息用于指示所述终端设备最后使用的小区，所述第二指示信息用于指示接入网络的等待时间；
    释放所述RRC连接。
  12. 根据权利要求11所述的方法，其特征在于，所述方法还包括：
    所述终端设备根据第一指示信息确定不更新所述第一信息。
  13. 根据权利要求11或12所述的方法，其特征在于，所述第一信息包括所述终端设备最后使用的小区信息。
  14. 一种通信方法，其特征在于，包括：
    在网络设备已发送第一消息且终端设备与所述网络设备之间的接入层安全未激活的情况下，确定不忽略所述第一消息中的第一指示信息，或者，忽略所述第一消息中除第一指示信息和第二指示信息之外的至少一个信息；
    其中，所述第一消息用于指示释放所述终端设备与网络设备之间的无线资源控制RRC连接，所述第一指示信息用于指示不更新第一信息，所述第一信息用于指示所述终端设备最后使用的小区，所述第二指示信息用于指示接入网络的等待时间；
    释放所述RRC连接。
  15. 根据权利要求14所述的方法，其特征在于，所述方法还包括：
    根据所述第一指示信息确定不更新第二信息，所述第二信息用于所述终端设备访问过的一个或多个小区。
  16. 根据权利要求15所述的方法，其特征在于，所述第二信息包括所述终端设备访问过的一个或多个小区的标识。
  17. 根据权利要求14至16任一项所述的方法，其特征在于，所述第一信息包括所述终端设备最后使用的小区信息。
  18. 根据权利要求14至17任一项所述的方法，其特征在于，所述方法还包括：
    在所述终端设备与所述网络设备之间的接入层安全未激活的情况下，确定所述终端设备不忽略所述第一消息中的第一指示信息，或者，所述网络设备确定所述终端设备忽略所述第一消息中除第一指示信息和第二指示信息之外的至少一个信息。
  19. 一种通信装置，其特征在于，包括处理单元和收发单元；
    其中，所述处理单元和所述收发单元用于执行如权利要求1至18任一项所述的方法。
  20. 一种通信装置，其特征在于，包括逻辑电路和输入输出接口；
    其中，所述逻辑电路和所述输入输出接口用于执行如权利要求1至18中任一项所述的方法。
  21. 一种通信装置，其特征在于，包括至少一个处理器，所述至少一个处理器与存储器耦合；
    所述存储器用于存储程序和/或指令；
    所述至少一个处理器用于基于所述程序和/或指令，以使所述通信装置执行如前述权利要求1至18任一项所述的方法。
  22. 一种计算机可读存储介质，其特征在于，所述介质存储有指令，当所述指令被计算机执行时，实现权利要求1至18中任一项所述的方法。
  23. 一种计算机程序产品，其特征在于，包括指令，当所述指令在计算机上运行时，使得计算机执行如权利要求1至18中任一项所述的方法。
  24. 一种通信系统，其特征在于，所述通信系统包括终端设备和网络设备；
    其中，所述终端设备用于执行如权利要求1至4任一项所述的方法，且所述网络设备用于执行如权利要求5至10任一项所述的方法；或者，所述终端设备用于执行如权利要求11至13任一项所述的方法，且所述网络设备用于执行如权利要求14至18任一项所述的方法。
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