WO2022206618A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2022206618A1
WO2022206618A1 PCT/CN2022/083149 CN2022083149W WO2022206618A1 WO 2022206618 A1 WO2022206618 A1 WO 2022206618A1 CN 2022083149 W CN2022083149 W CN 2022083149W WO 2022206618 A1 WO2022206618 A1 WO 2022206618A1
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WIPO (PCT)
Prior art keywords
terminal device
resource
network device
ssb
inactive state
Prior art date
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PCT/CN2022/083149
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English (en)
French (fr)
Inventor
酉春华
徐小英
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP22778800.7A priority Critical patent/EP4311149A4/en
Priority to JP2023560737A priority patent/JP7700263B2/ja
Publication of WO2022206618A1 publication Critical patent/WO2022206618A1/zh
Priority to US18/474,937 priority patent/US12418954B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling
    • 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
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a communication method and apparatus.
  • the standard decided to introduce a new radio resource control (radio resource control, RRC) state, inactive state (inactive state), terminal equipment and network suspend radio resources Control (radio resource control, RRC) connection, so as to achieve the same power saving effect as the idle state.
  • RRC radio resource control
  • the difference from the idle state is that in the inactive state, the terminal device and the access network device save the context of the terminal device.
  • the terminal device needs to enter the connected state, for example, the terminal device has uplink data to send, or when the network device pages the terminal device to enter the connected state, the terminal device enters the connected state based on the saved terminal device context, thereby reducing the delay. Save signaling overhead.
  • the terminal device in the idle state or inactive state needs to enter the connected state to transmit data with the network device.
  • the terminal device For small and infrequently transmitted data packets, it will still lead to unnecessary power consumption and signaling. overhead. Therefore, a possible way is to perform small data transmission in the inactive state, and the terminal does not need to enter the connected state.
  • the access network equipment includes a centralized unit (CU) and one or more distributed units (DU), that is, when CU-DU is separated, how to ensure that small data transmission does not occur during terminal movement. affected, which is still under discussion.
  • CU centralized unit
  • DU distributed units
  • the embodiments of the present application provide a communication method and apparatus, so that the terminal equipment can improve the small data transmission performance of the terminal equipment during the moving process.
  • the present application provides a communication method, including: a centralized unit of a first network device sends first indication information to a terminal device through a distributed unit of the first network device; the first indication information is used for Instruct the terminal device to configure the authorized first resource, the first resource is associated with a first synchronization signal broadcast channel block (synchronization signal block, SSB); the first SSB is used for the terminal device in an inactive state , and determine whether to use the first resource to send data.
  • a centralized unit of a first network device sends first indication information to a terminal device through a distributed unit of the first network device; the first indication information is used for Instruct the terminal device to configure the authorized first resource, the first resource is associated with a first synchronization signal broadcast channel block (synchronization signal block, SSB); the first SSB is used for the terminal device in an inactive state , and determine whether to use the first resource to send data.
  • synchronization signal block synchronization signal block
  • the first network device when the first network device instructs the terminal device to configure the authorized first resource, it can associate the corresponding resource through the SSB, for example, associate the first resource through the first SSB, so that the terminal device can be in the inactive state. , determine whether to use the first resource to send data through the first SSB associated with the first resource, avoiding the network device sending additional signaling for the terminal device to instruct the terminal device when to use the configuration authorized resources for small data transmission.
  • the terminal device There is also no need to enter the connection state to receive related signaling, which improves the efficiency of the terminal device in the inactive state for small data transmission, and reduces the time delay of the terminal device in the inactive state for small data transmission.
  • the first SSB is used by the terminal device in the inactive state to determine whether to use the first resource to send data, including: the reference signal received power of the first SSB ( reference signal receiving power, RSRP) is used to determine whether the uplink synchronization of the first resource is invalid; when it is determined that the uplink synchronization of the first resource is valid, it is determined to use the first resource to send data; When the uplink synchronization of the resource fails, it is determined not to use the first resource to send data.
  • the reference signal received power of the first SSB reference signal receiving power, RSRP
  • RSRP reference signal receiving power
  • the uplink synchronization of the first SSB is invalid, it is determined whether the first resource for small data transmission authorized by the configuration associated with the first SSB can be used to transmit small data of the terminal device in the inactive state. Therefore, the signaling interaction between the terminal device and the first network device can be reduced, the transmission performance of small data in the inactive state can be improved, and the transmission delay can be reduced.
  • the terminal device can release corresponding resources in time, and the terminal device avoids using invalid resources for small data transmission, thereby improving the success rate of the terminal device transmission.
  • the RSRP of the first SSB is used to determine whether the uplink synchronization of the first resource is invalid, including: when the RSRP of the first SSB is greater than or equal to a first threshold, determining the first The uplink synchronization of a resource is valid; when the increase and change of the RSRP of the first SSB is greater than or equal to the second threshold, or when the decrease and change of the RSRP of the first SSB is greater than or equal to the third threshold, determine The uplink synchronization of the first resource is invalid.
  • the first SSB is invalid according to the RSRP of the first SSB, and accordingly, whether the first resource of small data transmission authorized by the configuration associated with the first SSB can be used to transmit the terminal equipment in non- Small data in the active state.
  • the complexity of determining whether the transmission resource is valid by the terminal can be reduced, and the transmission efficiency can be improved.
  • the centralized unit of the first network device sends second indication information to the terminal device through the distributed unit of the first network device; the second indication information is used to indicate the The second resource authorized by the configuration of the terminal device, where the second resource is used by the terminal device to send data using the second resource in the inactive state and the connected state.
  • the terminal device can use the second resource for small data transmission regardless of whether it is in the inactive state or the connected state, so as to avoid switching
  • the influence of the process on the transmission of small data does not need to reconfigure the corresponding resources for the terminal device after switching, which improves the efficiency and performance of the transmission of small data by the terminal device.
  • the centralized unit of the first network device sends the context of the terminal device in the inactive state to the second network device; the centralized unit of the first network device sends the context of the terminal device in the inactive state to the second network device;
  • the distributed unit of the first network device sends a first message, where the first message is used to instruct the distributed unit of the first network device to release the context of the terminal device.
  • the first network device can determine that the current terminal device is switched to the second network device, so as to timely notify
  • the distributed unit of the first network device releases the context of the terminal device, so that the distributed unit of the first network device can release the terminal in time as the terminal device switches to the second network device during the small data transmission process of the terminal device.
  • the context of the device is improved corresponding to the context of the terminal device by the distributed unit of the first network device.
  • the method further includes: the centralized unit of the first network device receives data from all the context request of the terminal device of the second network device.
  • the first network device can determine that the second network device is the network device to be switched by the terminal device based on the context request request of the terminal device sent by the second network device, thereby facilitating the context of the terminal device by the first network device Management is performed to save resource overhead while ensuring that the terminal device can smoothly transmit small data during the handover process.
  • a possible implementation manner before the centralized unit of the first network device sends the context of the terminal device in the inactive state to the second network device, further comprising: the centralized unit of the first network device The identity verification performed by the second network device succeeds.
  • the centralized unit of the first network device After the centralized unit of the first network device successfully performs identity verification on the second network device, it instructs the distributed unit of the first network device to release the context of the terminal device to ensure that the second network device On the premise of device security, that is, on the premise that the terminal device can successfully access the second network device, the overhead of resources is saved, and the problem that may cause the terminal device to frequently switch network devices is avoided.
  • the context includes one or more of the following:
  • PDCCH physical downlink control channel
  • I-RNTI inactive radio network temporary identity
  • Radio link control radio link control
  • RLC radio link control
  • the present application provides a communication method, wherein a second network device sends first indication information to a terminal device; the first indication information is used to indicate a configuration authorized first resource of the terminal device, the first The resource is associated with the first SSB; the first SSB is used by the terminal device to determine whether to use the first resource to send data in an inactive state of the terminal device.
  • the second network device may be a network device after the terminal device is switched from the first network device. It may also be the network device before the terminal device is switched from the first network device.
  • the second network device instructs the terminal device to configure the authorized first resource, it can associate the corresponding resource through the SSB, for example, associate the first resource through the first SSB, so that the terminal device can be in the inactive state. , determine whether to use the first resource to send data through the first SSB associated with the first resource, avoiding the network device sending additional signaling for the terminal device to instruct the terminal device when to use the configuration authorized resources for small data transmission.
  • the terminal device There is also no need to enter the connection state to receive related signaling, which improves the efficiency of the terminal device in the inactive state for small data transmission, and reduces the time delay of the terminal device in the inactive state for small data transmission.
  • the first SSB is used for the terminal device to determine whether to use the first resource to send data in the inactive state, including: the RSRP of the first SSB is used to determine the whether the uplink synchronization of the first resource is invalid; when it is determined that the uplink synchronization of the first resource is valid, it is determined to use the first resource to send data; when it is determined that the uplink synchronization of the first resource is invalid, it is determined to release the first resource.
  • the RSRP of the first SSB is used to determine whether the uplink synchronization of the first resource is invalid, including: when the RSRP of the first SSB is greater than or equal to a first threshold, determining the first The uplink synchronization of a resource is valid; when the increase and change of the RSRP of the first SSB is greater than or equal to the second threshold, or when the decrease and change of the RSRP of the first SSB is greater than or equal to the third threshold, determine The uplink synchronization of the first resource is invalid.
  • the second network device sends second indication information to the terminal device, where the second indication information is used to indicate a second resource authorized by the configuration of the terminal device, the second resource for the terminal device to use the second resource to send data in the inactive state and the connected state.
  • the terminal device can use the second resource for small data transmission regardless of whether it is in the inactive state or the connected state, so as to avoid switching
  • the influence of the process on the transmission of small data does not need to reconfigure the corresponding resources for the terminal device after switching, which improves the efficiency and performance of the transmission of small data by the terminal device.
  • the second network device receives the context of the terminal device in the inactive state from the centralized unit of the first network device, and the context is used for the second network device to be the terminal device restore the connection state.
  • the second network device when the second network device determines that the current terminal device is switched from the inactive state to the connected state, the second network device can obtain the context of the terminal device from the centralized unit of the first network device before the switch, so that the terminal device is in In the process of switching from the inactive state to the connected state, there is no need to re-initiate access, and small data transmission can be performed based on the second resource configured by the second network device, so as to avoid the influence of the state switching process of the terminal device on the small data transmission.
  • the context includes one or more of the following: a configuration authorization configured for the terminal device; configuration information of the PDCCH configured for the terminal device; a temporary identifier for scrambling the PDCCH ; the inactive I-RNTI configured for the terminal device; the configuration information of the RLC layer of the radio bearer configured for the terminal device.
  • the present application provides a communication method, wherein a terminal device receives, through a distributed unit of a first network device, first indication information sent by a centralized unit of the first network device, where the first indication information is used to indicate The terminal device configures the authorized first resource, and the first resource is associated with the first SSB; the terminal device determines whether to use the first resource to send data according to the first SSB in an inactive state.
  • the terminal device can configure the authorized first resource according to the instruction of the first network device for the terminal device, and associate the corresponding resource with the SSB, for example, associate the first resource through the first SSB, in the inactive state, through the first resource
  • the first SSB associated with the resource determines whether to use the first resource to send data, which prevents the network device from sending additional signaling for the terminal device to instruct the terminal device when to use the configured and authorized resources for small data transmission.
  • the terminal device does not need to enter the connection.
  • the related signaling is received in the inactive state, which improves the efficiency of small data transmission performed by the terminal device in the inactive state, and reduces the delay of the small data transmission performed by the terminal device in the inactive state.
  • a fourth aspect provides a communication method, wherein a terminal device receives first indication information sent by a second network device, where the first indication information is used to instruct the terminal device to configure a first resource authorized by the terminal device, and the first resource is the same as the first resource.
  • An SSB is associated; the terminal device determines whether to use the first resource to send data according to the first SSB in an inactive state.
  • the second network device may be a network device after the terminal device is switched from the first network device. It may also be the network device before the terminal device is switched from the first network device.
  • the first resource in the inactive state, determines whether to use the first resource to send data through the first SSB associated with the first resource, which improves the efficiency of small data transmission by the terminal device in the inactive state, and reduces the Delay for small data transmission in active state.
  • the terminal device after the terminal device is switched from the second network device to the first network device, it can still determine whether small data transmission can be performed according to the first resource configured by the second network device for the terminal device, without the need for the first network device to reconfigure the corresponding
  • the configuration of authorized small data resources improves the performance of the terminal device to transmit small data.
  • the terminal device determines whether to use the first resource to send data according to the first SSB, including: the terminal device according to The reference signal power RSRP of the first SSB determines whether the uplink synchronization of the first resource is invalid; the terminal device determines to use the first resource to send data when determining that the uplink synchronization of the first resource is valid; When determining that the uplink synchronization of the first resource is invalid, the terminal device determines not to use the first resource to send data.
  • the reference signal power RSRP of the first SSB determines whether the uplink synchronization of the first resource is invalid
  • the terminal device determines to use the first resource to send data when determining that the uplink synchronization of the first resource is valid
  • the terminal device determines not to use the first resource to send data.
  • the terminal device releases the first resource when determining that the uplink synchronization of the first resource is invalid.
  • the terminal device determines whether the uplink synchronization of the first resource is invalid according to the RSRP of the first SSB, including: the terminal device is in the When the RSRP of the first SSB is greater than or equal to the first threshold, it is determined that the uplink synchronization of the first resource is valid; when the increase and change of the RSRP of the first SSB is greater than or equal to the second threshold by the terminal device, or, When the decreasing variation of the RSRP of the first SSB is greater than or equal to a third threshold, it is determined that the uplink synchronization of the first resource is invalid.
  • the terminal device receives, through the distributed unit of the first network device, the second indication information sent by the centralized unit of the first network device; the second indication information is used to indicate A second resource authorized by the configuration of the terminal device, where the second resource is used by the terminal device to send data using the second resource in the inactive state and the connected state.
  • the terminal device receives second indication information sent by the second network device, where the second indication information is used to indicate the configuration of the terminal device The authorized second resource, where the second resource is used by the terminal device to send data by using the second resource in the inactive state and the connected state.
  • the terminal device can use the second resource for small data transmission regardless of whether it is in the inactive state or the connected state, so as to avoid switching
  • the influence of the process on the transmission of small data does not need to reconfigure the corresponding resources for the terminal device after switching, which improves the efficiency and performance of the transmission of small data by the terminal device.
  • the terminal device restores the context of the terminal device obtained by the second network device to the connected state, and the context of the terminal device is the first
  • the second network device is obtained by receiving a centralized unit from the first network device.
  • the present application provides a communication method, wherein a centralized unit of a first network device sends a context of a terminal device in an inactive state to a second network device; the centralized unit of the first network device sends the context of a terminal device in an inactive state to a second network device; A distributed unit of a network device sends a first message, where the first message is used to instruct the distributed unit of the first network device to release the context of the terminal device.
  • the first network device can determine that the current terminal device is switched to the second network device, so as to timely notify
  • the distributed unit of the first network device releases the context of the terminal device, so that the distributed unit of the first network device can release the terminal in time as the terminal device switches to the second network device during the small data transmission process of the terminal device.
  • the context of the device improves the utilization rate of the resources corresponding to the context of the terminal device by the distributed unit of the first network device, and improves the overall network performance.
  • the method further includes: the centralized unit of the first network device receives data from all the context request of the terminal device of the second network device.
  • the first network device can determine that the second network device is the network device to be switched by the terminal device based on the context request request of the terminal device sent by the second network device, thereby facilitating the context of the terminal device by the first network device Management is performed to save resource overhead while ensuring that the terminal device can smoothly transmit small data during the handover process.
  • a possible implementation manner before the centralized unit of the first network device sends the context of the terminal device in the inactive state to the second network device, further comprising: the centralized unit of the first network device The identity verification performed by the second network device succeeds.
  • the centralized unit of the first network device After the centralized unit of the first network device successfully performs identity verification on the second network device, it instructs the distributed unit of the first network device to release the context of the terminal device to ensure that the second network device On the premise of device security, that is, on the premise that the terminal device can successfully access the second network device, the overhead of resources is saved, and the problem that may cause the terminal device to frequently switch network devices is avoided.
  • the context includes one or more of the following:
  • I-RNTI inactive wireless network temporary identifier
  • the terminal device in the inactive state is used to transmit data with the first network device.
  • the present application provides a communication apparatus, which is applied to a first network device, and the first network device may include a centralized unit and a distributed unit.
  • the centralized unit may include a processing module, a sending module and a receiving module.
  • the processing module of the centralized unit is configured to send the first indication information to the terminal device via the distributed unit of the first network device through the sending module of the centralized unit; the first indication information is used for Instruct the terminal device to configure the authorized first resource, the first resource is associated with the first SSB; the first SSB is used by the terminal device to determine whether to use the first resource to send data in an inactive state .
  • the processing module of the centralized unit is configured to send the context of the terminal device in the inactive state to the second network device through the sending module of the centralized unit; the processing module of the centralized unit is configured to use The sending module of the centralized unit sends a first message to the distributed unit of the first network device, where the first message is used to instruct the distributed unit of the first network device to release the context of the terminal device.
  • a possible implementation manner before the processing module of the centralized unit sends the context of the terminal device in the inactive state to the second network device through the sending module of the centralized unit, it is also used to receive the context of the terminal device in the inactive state through the receiving module of the centralized unit.
  • a context retrieval request from the terminal device of the second network device.
  • the processing module of the centralized unit is also used to identify the second network device before sending the context of the terminal device in the inactive state to the second network device through the sending module of the centralized unit. Verification succeeded.
  • the processing module of the centralized unit is configured to send the context of the terminal device in the inactive state to the second network device through the sending module of the centralized unit;
  • the sending module of the type unit sends a first message to the distributed unit of the first network device, where the first message is used to instruct the distributed unit of the first network device to release the context of the terminal device.
  • the processing module of the centralized unit is used to send the context of the terminal device in the inactive state to the second network device through the sending module of the centralized unit, and is also used to pass the receiving module of the centralized unit.
  • a context retrieval request from the terminal device of the second network device is received.
  • the processing module of the centralized unit is used for sending the context of the terminal device in the inactive state to the second network device through the sending module of the centralized unit, and also for sending the context of the terminal device in the inactive state to the second network device. Identity verification is successful.
  • the context includes one or more of the following: configuration authorization configured for the terminal device; configuration information of a physical downlink control channel configured for the terminal device; used for scrambling the physical Temporary identifier of the downlink control channel;
  • the inactive wireless network temporary identifier configured for the terminal device; the configuration information of the radio link control layer of the radio bearer configured for the terminal device.
  • the terminal device in the inactive state is used to transmit data with the first network device.
  • the present application provides a communication apparatus, which is applied to a second network device, and the second network device may include a processing module, a sending module, and a receiving module.
  • a processing module configured to send the first indication information to the terminal device through the sending module; the first indication information is used to indicate the first resource of the configuration authorization of the terminal device, the first resource is associated with the first SSB; the The first SSB is used by the terminal device to determine whether to use the first resource to send data in an inactive state of the terminal device.
  • the RSRP of the first SSB is used to determine whether the uplink synchronization of the first resource is invalid; when it is determined that the uplink synchronization of the first resource is valid, It is determined to use the first resource to send data; when it is determined that the uplink synchronization of the first resource fails, it is determined to release the first resource.
  • the RSRP of the first SSB when the RSRP of the first SSB is greater than or equal to a first threshold, it is determined that the uplink synchronization of the first resource is valid; When the increase and change of the RSRP is greater than or equal to the second threshold, or when the decrease and change of the RSRP of the first SSB is greater than or equal to the third threshold, it is determined that the uplink synchronization of the first resource is invalid.
  • the processing module of the centralized unit is configured to send the first information to the terminal device through the distributed unit of the first network device through the sending module of the centralized unit.
  • Two indication information the second indication information is used to indicate the second resource authorized by the configuration of the terminal device, and the second resource is used for the terminal device to use the The second resource sends data.
  • the context includes one or more of the following:
  • I-RNTI inactive wireless network temporary identifier
  • the present application provides a communication apparatus, which is applied to a terminal device or a chip of the terminal device.
  • the communication device may include a processing module, a receiving module and a sending module.
  • the processing module is configured to receive, through the receiving module, the first indication information sent by the centralized unit of the first network device through the distributed unit of the first network device, the first indication information using instructing the terminal device to configure a first resource authorized, the first resource is associated with the first SSB; the processing module is configured to determine whether to use the first SSB in an inactive state according to the first SSB The resource sends data.
  • the processing module is configured to receive, through the receiving module, the first indication information sent by the second network device, where the first indication information is used to instruct the terminal device to configure the authorized first resource, so The first resource is associated with the first SSB; the terminal device determines whether to use the first resource to send data according to the first SSB in an inactive state.
  • the second network device may be a network device after the terminal device is switched from the first network device. It may also be the network device before the terminal device is switched from the first network device.
  • the processing module is configured to, in an inactive state, determine whether the uplink synchronization of the first resource is invalid according to the reference signal power RSRP of the first SSB; When the uplink synchronization of the resource is valid, it is determined to use the first resource to send data; when it is determined that the uplink synchronization of the first resource is invalid, it is determined not to use the first resource to send data.
  • the processing module is configured to release the first resource when it is determined that the uplink synchronization of the first resource fails in an inactive state.
  • the processing module is configured to, in an inactive state, determine that the uplink synchronization of the first resource is valid when the RSRP of the first SSB is greater than or equal to a first threshold; When the increase change amount of the RSRP of the first SSB is greater than or equal to the second threshold, or when the decrease change amount of the RSRP of the first SSB is greater than or equal to the third threshold value, it is determined that the uplink synchronization of the first resource is invalid.
  • the processing module is configured to receive the second indication information sent by the centralized unit of the first network device through the distributed unit of the first network device through the receiving module; the second indication information
  • the second resource for indicating the configuration authorization of the terminal device, the second resource for configuration authorization is used for the terminal device to use the second resource to send data in the inactive state and the connected state.
  • the processing module is configured to receive, through the receiving module, second indication information sent by the second network device, where the second indication information is used to indicate the second resource authorized by the configuration of the terminal device , the second resource is used by the terminal device to send data using the second resource in the inactive state and the connected state.
  • the processing module is configured to restore the context of the terminal device obtained through the second network device to the connected state, and the context of the terminal device is that the second network device receives data from the first Obtained from a centralized unit of network equipment.
  • an embodiment of the present application provides a communication device, including a processor and a memory, where the memory is used to store computer-executed instructions, and when the device is running, the processor executes the computer-executed instructions stored in the memory, so that the The apparatus performs any of the implementation methods of the first aspect or the fifth aspect above.
  • an embodiment of the present application provides a communication device, including a processor and a memory, where the memory is used to store computer-executed instructions, and when the device is running, the processor executes the computer-executed instructions stored in the memory, so that the The apparatus executes any of the above-mentioned implementation methods of the second aspect.
  • an embodiment of the present application provides a communication device, including a processor and a memory, where the memory is used to store computer-executed instructions, and when the device is running, the processor executes the computer-executed instructions stored in the memory, to The apparatus is caused to perform any method in each of the implementation methods of the third aspect or the fourth aspect described above.
  • an embodiment of the present application further provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the computer-readable storage medium is run on a computer, the computer is made to execute the above-mentioned first to fifth aspects Any of the implementation methods.
  • an embodiment of the present application further provides a computer program product, the computer product includes a computer program, when the computer program is executed, any one of the implementation methods of the first to fifth aspects above is executed.
  • an embodiment of the present application further provides a chip system, including: a processor configured to execute any method among the implementation methods of the foregoing first aspect to the fifth aspect.
  • an embodiment of the present application further provides a communication system, including the first network device as in the sixth aspect or the ninth aspect, or including the second network device as in the seventh aspect or the tenth aspect, or The terminal device as in the eighth aspect or the eleventh aspect is included.
  • 1 to 2 are schematic diagrams of a network architecture to which the embodiments of the present application are applied;
  • 3a is a schematic diagram of a protocol stack corresponding to a network architecture
  • FIG. 3b is a schematic diagram of a network architecture to which an embodiment of the present application is applicable.
  • FIG. 4a is a schematic diagram of a network architecture to which an embodiment of the present application is applicable.
  • 4b is a schematic flowchart of a method for a terminal device to recover from an RRC inactive state to an RRC connected state;
  • FIG. 5 is a schematic flowchart of a context establishment method
  • FIG. 6 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 7 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a communication device according to an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a communication device according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of a communication device according to an embodiment of the present application.
  • the technical solutions of the embodiments of the present application can be applied to various communication systems, for example: the 5th Generation mobile communication technology (5G) system (for example, New Radio (NR)), Long Term Evolution (Long Term Evolution, LTE) system, LTE Frequency Division Duplex (Frequency Division Duplex, FDD) system, LTE Time Division Duplex (Time Division Duplex, TDD), etc., which are not limited herein.
  • 5G 5th Generation mobile communication technology
  • NR New Radio
  • LTE Long Term Evolution
  • LTE Frequency Division Duplex Frequency Division Duplex
  • FDD Frequency Division Duplex
  • Time Division Duplex Time Division Duplex
  • FIG. 1 is a schematic diagram of a network architecture of a communication system to which an embodiment of the present application is applied.
  • the communication system includes terminal devices 1301 and 1302 and network devices.
  • the terminal device can access the wireless network to obtain services of an external network (eg, the Internet) through the wireless network, or communicate with other devices through the wireless network, for example, can communicate with other terminal devices.
  • the access network may be a next generation radio access network (NG-RAN), and the access network may include access network equipment, such as base stations (eg, gNBs), and interfaces between gNBs (eg, Xn interfaces) )connect.
  • the RAN equipment is used to access the terminal equipment to the wireless network, and the gNB and the 5GC are connected through an interface (eg, an Ng interface).
  • the RAN may include one or more access network devices, such as access network device 1101 and access network device 1102 .
  • An access network device is a node or device that accesses a terminal device to a wireless network, and the access network device may also be called a base station.
  • Access network equipment includes but is not limited to: a new generation base station (generation Node B, gNB), an evolved node B (evolved node B, eNB), a radio network controller (radio network controller, RNC) in the 5G communication system, Node B (node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station ((home evolved nodeB, HeNB) or (home node B, HNB)) , baseband unit (baseBand unit, BBU), transmitting and receiving point (transmitting and receiving point, TRP), transmitting point (transmitting point, TP), or mobile switching center.
  • generation Node B, gNB generation Node B
  • eNB evolved node B
  • RNC radio network controller
  • Node B no
  • a core network may include multiple core network devices, and the core network devices are used to manage terminal devices and provide gateways for communication with external networks.
  • the CN may include one or more core network elements, such as the core network element 120 .
  • the core network may be a 5G core network (5G core network, 5GC).
  • 5GC includes one or more functions or devices, for example, the core network device can be an access and mobility management function (AMF) entity, a session management function (SMF) entity or a user plane function (user plane function, UPF) entity, etc., session management function (session management function, SMF).
  • AMF access and mobility management function
  • SMF session management function
  • UPF user plane function
  • SMF session management function
  • the core network equipment may be a mobility management entity (mobility management entity, MME), a serving gateway (serving gateway, S-GW), and the like.
  • MME mobility management entity
  • S-GW serving gateway
  • terminal equipment can also be called terminal equipment, user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal equipment (mobile terminal, MT), etc.
  • sexual devices can also be IoT devices.
  • the terminal device includes a handheld device with a wireless connection function, a vehicle-mounted device, and the like.
  • terminal devices can be: mobile phones (mobile phones), tablet computers, notebook computers, PDAs, mobile internet devices (MIDs), wearable devices (such as smart watches, smart bracelets, pedometers, etc.) , in-vehicle equipment (for example, cars, bicycles, electric vehicles, airplanes, ships, trains, high-speed rail, etc.), virtual reality (VR) equipment, augmented reality (AR) equipment, industrial control (industrial control) wireless terminal equipment, smart home equipment (such as refrigerators, TVs, air conditioners, electricity meters, etc.), intelligent robots, workshop equipment, wireless terminal equipment in self driving, wireless terminal equipment in remote medical surgery Terminal equipment, wireless terminal equipment in smart grid, wireless terminal equipment in transportation safety, wireless terminal equipment in smart city, or wireless terminal in smart home Equipment, flying equipment (eg, smart robots, hot air balloons, drones, airplanes), etc.
  • the solution is described in terms of UE or terminal device.
  • the number of each device in the communication system shown in FIG. 1 is only for illustration, and the embodiments of the present application are not limited to this. In practical applications, the communication system may also include more terminal devices and more RAN devices. Other devices may also be included.
  • the device for implementing the function of the access network device may be the access network device, or may be a device capable of supporting the access network device to realize the function, such as a chip system or a device capable of realizing the function of the access network device
  • the combination device and component of the device can be installed in the access network equipment.
  • the technical solutions provided by the embodiments of the present application are described by taking the device for implementing the functions of the access network equipment as an example of the access network equipment.
  • FIG. 2 is a schematic diagram of a network architecture under a 5G communication system to which an embodiment of the present application is applicable.
  • the network architecture includes CN equipment (eg, 5GC shown in FIG. 2 ) and RAN equipment.
  • network equipment can be composed of two logical network elements, CU and DU. Among them, some functions of the network equipment are deployed in one CU, and the remaining functions are deployed in DUs, and multiple DUs can share one CU to save costs and facilitate network expansion. Depending on the scenario and requirements, it can be deployed together or separately.
  • the network architecture is hereinafter referred to as the CU-DU separation architecture.
  • the CU and the DU are connected through an interface (for example, an F1 interface).
  • the CU represents that the base station is connected to the core network through an interface (eg, Ng interface).
  • the UE may be connected with an access network device (eg, a gNB), and specifically, the UE may be connected with a DU in the gNB.
  • CU is connected to 5GC and DU respectively.
  • the CU In the downlink communication link, the CU is used to receive data from the 5GC and send the data to the DU.
  • the CU In the uplink communication link, the CU is used to receive data from the DU and send it to the 5GC.
  • the CU has a centralized control function for the DU.
  • devices with CU functions may have different names. For the convenience of description, the devices with the CU function are collectively referred to as access network central units.
  • the DU is connected to the CU and the user equipment (UE) respectively.
  • the DU In the downlink communication link, the DU is used to receive data from the CU and send the data to the UE.
  • the uplink communication link it is used to receive data from the UE and send it to the UE.
  • CU In systems using different radio access technologies, devices with DU functions may have different names. For the convenience of description, the devices with the DU function are collectively referred to as access network distributed units.
  • the control plane protocol layer structure may include a radio resource control (radio resource control, RRC) layer, a packet data convergence protocol (packet data Functions of protocol layers such as convergence protocol (PDCP) layer, RLC layer, media access control (MAC) layer and physical layer;
  • the user plane protocol layer structure may include PDCP layer, RLC layer, MAC layer and physical layer, etc.
  • SDAP service data adaptation protocol
  • the main function of the RRC layer is the high-level control plane of the UE, which is related to the access control, maintenance, release and configuration of the UE. Only the RRC layer can parse the RRC message; the MAC layer and the physical layer (PHY) layer
  • the main function of the UE is the low-level scheduling of the UE, which is related to the data packet and data scheduling of the UE. Only the MAC layer can parse the control signaling of the MAC layer, and the PHY layer can parse the control signaling of the PHY layer.
  • a RAN device may implement the functions of protocol layers such as RRC, PDCP, RLC, and MAC by one node, or may implement the functions of these protocol layers by multiple nodes.
  • the gNB-DU For the control plane, in the UL direction, the gNB-DU encapsulates the RRC message generated by the UE in the F1AP message of the F1 interface and sends it to the gNB-CU; in the DL direction, the gNB-CU encapsulates the RRC message in the F1AP message and sends it to the gNB-CU.
  • gNB-DU extracts the RRC message from the F1AP message, maps it to the SRB corresponding to the Uu interface, and sends it to the UE.
  • the gNB-DU maps the UE data packets received from the DRB on the Uu interface to the corresponding GTP tunnel and sends them to the gNB-CU; in the DL direction, the gNB-CU maps the UE data packets It is sent to the gNB-DU in the corresponding GTP tunnel.
  • the gNB-DU extracts the UE data packet from the GTP tunnel, and maps the UE data packet to the DRB corresponding to the Uu interface and sends it to the UE.
  • the signaling generated by the CU can be sent to the terminal device through the DU, or the signaling generated by the terminal device can be sent to the CU through the DU.
  • the DU may not parse the signaling, but directly encapsulate it through the protocol layer and transparently transmit it to the terminal device or CU.
  • the sending or receiving of the signaling by the DU includes this scenario.
  • the signaling of the RRC or PDCP layer is finally processed as the signaling of the physical layer and sent to the terminal device, or is converted from the received signaling of the physical layer.
  • the signaling of the RRC or PDCP layer can also be considered to be sent by the DU, or sent by the DU and radio frequency loading.
  • the segmentation between the CU of the network device and the DU of the network device according to the protocol stack may be as shown in Figure 3b.
  • the RRC layer, the SDAP layer, and the PDCP layer are deployed in the CU of the network device; the RLC layer, the MAC layer, and the physical layer are deployed in the DU of the network device.
  • the function segmentation of the CU and the DU may be performed according to the protocol stack.
  • the CU of the network device and the DU of the network device serve as two functional entities.
  • One possible way is to differentiate the functions by the real-time nature of processing content.
  • the RRC layer, SDAP layer and PDCP layer are deployed in the CU.
  • the RLC layer, MAC layer, and PHY layer are deployed in the DU.
  • the CU has the processing capabilities of RRC, PDCP and SDAP.
  • the CU of the network device is responsible for managing the RRC state of the terminal device.
  • DU has the processing capability of RLC, MAC and PHY.
  • the CU includes the processing capabilities of RRC, PDCP, RLC and SDAP, and the DU has the processing capabilities of MAC and PHY.
  • the CU includes the processing capabilities of RRC, PDCP, RLC, SDAP, and part of the MAC (eg, adding a MAC header), and the DU has the processing capabilities of the PHY and part of the MAC (eg, scheduling).
  • the division of this protocol layer is only an example, and it can also be divided at other protocol layers, for example, at the RLC layer, the functions of the RLC layer and the above protocol layers are set in the CU, and the functions of the protocol layers below the RLC layer are set in the DU; Alternatively, in a certain protocol layer, for example, some functions of the RLC layer and functions of the protocol layers above the RLC layer are placed in the CU, and the remaining functions of the RLC layer and the functions of the protocol layers below the RLC layer are placed in the DU. In addition, it can also be divided in other ways, for example, by time delay, the functions whose processing time needs to meet the delay requirements are set in the DU, and the functions that do not need to meet the delay requirements are set in the CU.
  • the division of the protocol layers described above is only an example, and the division of other protocol layers may also be performed, and will not be described one by one here.
  • the embodiments of the present application may also be applied to an LTE communication system.
  • RAN equipment and CN equipment may also be included in the LTE communication system.
  • the RAN equipment (eNB) includes a baseband device and a radio frequency device, wherein the baseband device can be implemented by one node or multiple nodes, and the radio frequency device can be implemented independently from the baseband device, or can be integrated in the baseband device, Or part of the remote part is integrated in the baseband device.
  • the radio frequency device may be arranged remotely from the baseband device, for example, a remote radio unit (remote radio unit, RRU) is arranged remotely from the BBU.
  • the radio frequency device may be remote, not placed in the DU, or integrated in the DU, or partially remote and partially integrated in the DU, which is not limited herein.
  • UEs included in the communication systems shown in FIG. 2 and FIG. 3b are only an example, and the embodiments of the present application are not limited thereto. For example, it may also include more UEs that communicate with access network devices (eg, gNBs), which are not described one by one in the accompanying drawings for concise description.
  • access network devices eg, gNBs
  • FIG. 2 although one base station and one UE respectively connected to each DU are shown, the communication system may not be limited to including the base station and each DU respectively. A connected UE will not be described in detail here.
  • FIG. 1 to FIG. 3 b only illustrate several functions or devices involved in the embodiments of the present application, and the communication system architecture may further include more or less functions or devices.
  • the 5GC device in FIG. 1 may also include unified data management (UDM) or data network (DN), etc.
  • UDM unified data management
  • DN data network
  • the DU shown in FIG. 2 may also be configured with more logical cells, etc. .
  • the CU of the network device may also be in the form of separation of the control plane (CP) and the user plane (UP), that is, the CU can Divided into two logical network elements: CU-CP and CU-UP.
  • CP control plane
  • UP user plane
  • the interface between CU-DUs is named as the W1 interface
  • the interface between the CU-DUs in the NR system is named as the F1 interface.
  • the functions of these two interfaces are similar.
  • the network device is a gNB in the NR system as an example for illustration.
  • the F1 interface includes a control plane (CP) and a user plane (UP).
  • the transport layer protocol of the control plane is the stream control transport protocol (SCTP), and the transmitted message is the F1 application layer protocol (F1 application protocol, F1AP) message.
  • the transport layer protocol of the user plane is the general packet radio service (General Packet Radio Service, GPRS) tunneling protocol user plane (GPRS Tunnelling Protocol User Plane, GTP-U).
  • GPRS General Packet Radio Service
  • the interface between CU-CP and CU-UP is named E1 and is used to transmit signaling between CU-CP and CU-UP.
  • the F1-C interface between CU-CP and DU is used to transmit F1 signaling between CU-CP and DU and RRC signaling of terminal equipment.
  • the F1-U interface between CU-CP and DU is used to transmit data of data radio bearer (DRB).
  • DRB data radio bearer
  • the DU air interface receives the uplink data carried on the DRB, it is processed by the physical layer, MAC layer, and RLC layer of the DU, and then the DRB data is sent to the CU through the F1-U interface.
  • the DU air interface receives the RRC message sent by the terminal device, it is processed by the physical layer, MAC layer, and RLC layer of the DU, and then sends the RRC message to the CU through the F1-CP interface.
  • the functions of the CU may be implemented by one entity, or may also be implemented by different entities.
  • the functions of the CU can be further divided, that is, the control plane and the user plane can be separated and implemented by different entities, namely the control plane CU entity (ie, the CU-CP entity) and the user plane CU entity. (ie the CU-UP entity), the CU-CP entity and the CU-UP entity can be coupled with the DU to jointly complete the functions of the access network device.
  • the interface between the CU-CP entity and the CU-UP entity may be the E1 interface
  • the interface between the CU-CP entity and the DU may be the F1-C interface
  • the interface between the CU-UP entity and the DU may be the F1-U interface interface.
  • one DU and one CU-UP can be connected to one CU-CP.
  • one DU can be connected to multiple CU-UPs
  • one CU-UP can be connected to multiple DUs.
  • the network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. It can be seen that, with the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
  • the CU has an RRC layer and is responsible for managing the RRC state of the terminal device.
  • RRC idle state may be included: RRC idle state (idle), RRC inactive state (Inactive), and RRC connected state (connected).
  • the terminal equipment In the RRC connection state, there is a dedicated RRC connection between the terminal equipment and the access network equipment. This dedicated RRC connection is the connection of DRB or SRB1. In the RRC idle state, the terminal device does not have a dedicated RRC connection with the access network device.
  • the RRC inactive state is a new RRC state in 5G.
  • the UE in the RRC inactive state can have a lower data transmission recovery delay because the UE in the RRC inactive state can quickly migrate to the RRC connection through the RRC Resume process. state without re-access.
  • the terminal device saves its own context, the source network device (Last serving gNB) saves the context of the terminal device, and the NG connection with AMF and UPF.
  • the dedicated RRC connection between the terminal device and the access network device is suspended and can be resumed later.
  • the terminal device moves under the RNA and may not notify the access network device.
  • the UE moves in the same RNA, it does not need to exchange information with the gNodeB.
  • the RNA update process needs to be started.
  • the UE in the RRC inactive state will suspend data processing, and the RRC inactive state can obtain a power consumption level similar to that in the RRC idle state, thereby saving the energy consumption of the terminal device.
  • the RRC inactive state is similar to the RRC idle state, both can only receive the content of the common search space (Paging, broadcast), and can perform cell reselection, and the principle of cell reselection is the same as that of the RRC idle state.
  • the terminal equipment can change from the RRC inactive state to the RRC connected state by requesting to restore the RRC connection.
  • FIG. 4b a schematic flowchart of a method for restoring an RRC connection provided by an embodiment of the present application, the method process includes:
  • Step 401 The terminal device sends an RRC resume request (RRC resume request) to the target base station.
  • the terminal device may initiate an RRC recovery process to the target base station.
  • the RRC recovery request may carry the I-RNTI, so that the target base station can request the source base station for the context of the terminal device.
  • Step 402 The target base station sends a terminal equipment context request (retrieve UE context request) to the source base station.
  • the terminal device context request request includes the I-RNTI in the RRC recovery request sent by the terminal.
  • the source base station can determine the context of the terminal device according to the I-RNTI and the saved context of the terminal device.
  • Step 403 The source base station sends a terminal equipment context request response (retrieve UE context response) to the target base station.
  • the terminal device context request response may include the context of the terminal device.
  • Step 404 The target base station sends an RRC resume message (RRC resume) to the terminal device.
  • RRC resume an RRC resume message
  • the terminal device after receiving the RRC recovery message, the terminal device enters the RRC connection state to realize the recovery of the RRC connection.
  • Step 405 The terminal device sends an RRC connection resume complete message (RRC Resume complete) to the target base station.
  • Step 406 The target base station sends data forwarding address indication information (Xn-U address indication) to the source base station.
  • Xn-U address indication data forwarding address indication information
  • the data forwarding address indication information may be used to notify the source base station of the tunnel address of data forwarding.
  • the data forwarding address may be the tunnel address used to forward downlink data.
  • the source base station may have the downlink data of the terminal device. , then the downlink data can be sent to the target base station, and then the target base station can send it to the terminal device.
  • Step 407 The source base station sends a path switch request to the core network.
  • the path switching request may be used to switch the data forwarding path between the core network and the base station. For example, the connection between the UPF and the source base station is switched to the connection between the UPF and the target base station, and subsequent downlink data can be directly sent to the target base station through the UPF.
  • Step 408 The core network device sends a path switch response to the source base station.
  • Step 409 The core network device sends a context release message (context release) to the source base station to notify the source base station to release the context of the terminal device.
  • a context release message context release
  • the signaling process from the RRC idle state to the RRC connected state that is, the initial access process of the UE, it includes the random access process, the RRC connection establishment process, and the initial context establishment process.
  • the signaling process from RRC inactive state to RRC connected state can save a lot of signaling interaction (for example, the RRC reconfiguration process and the security mode configuration process are reduced on the Uu interface, and the context establishment process and authentication process are reduced on the NG interface). .
  • the saving of these signaling interactions enables the RRC inactive state to obtain a faster access delay than the RRC idle state.
  • Step 501 The terminal device sends capability information to the CU of the network device.
  • the capability information is used to indicate the capability of the terminal device. Further, optionally, the capability information is used to indicate that the terminal device has the capability of data transmission in an inactive state, and the capability indicates that the terminal device has the capability of transmitting uplink information in a configuration grant or a scheduling grant when the terminal device is in an inactive state.
  • the uplink information includes but is not limited to uplink signaling and uplink data.
  • the uplink signaling may be uplink RRC signaling, etc.
  • the uplink data may be uplink service data, such as video data, audio data, and the like.
  • the scheduling authorization refers to the resource request sent by the terminal device, and the network device allocates resources to the terminal device according to the resource request.
  • the resource request can be a preamble in the random access process, or uplink scheduling. request etc.
  • Configuration authorization refers to the resources pre-configured by network equipment, without the need for terminal equipment to send resource requests, and has the characteristics of one-time allocation and multiple-use.
  • the capability information may also indicate other capabilities of the terminal device, which are not limited in the embodiment of the present application.
  • Step 502 The CU of the network device sends a UE context establishment request message to the DU of the network device.
  • the UE context establishment request message may be used to request the establishment of a context for the terminal device.
  • the UE context establishment request message may include the capability information.
  • Step 503 The DU of the network device establishes a context for the terminal device, and sends a UE context establishment response message to the CU of the network device.
  • the context may include an air interface context and an F1 context.
  • the air interface context may refer to the RLC layer configuration, MAC layer configuration, configuration information of the physical layer, I-RNTI, C-RNTI, etc. of the terminal device. Wherein, it may further include "configuration grant for data transmission in inactive state", PDCCH configuration information for sending physical layer feedback information, and RNTI for scrambling the PDCCH.
  • the F1 context may refer to the F1AP ID, the transport layer address information of F1 data transmission, and the like.
  • the DRB data of the terminal device is transmitted between the CU of the network device and the DU of the network device, which may also be referred to as F1 data transmission.
  • the context established by the DU of the network device for the terminal device may include one or more of the following:
  • PUSCH physical uplink shared channel
  • the configuration authorization may be configured for the terminal device in the inactive state, and the terminal device in the inactive state may use the configuration authorization to send one or more of uplink RRC signaling and uplink data.
  • the time-frequency resources configured by the configuration authorization may be time-frequency resources dedicated to terminal equipment, that is, time-frequency resources that are not shared with other terminal equipment.
  • the DU of the network device may establish a mapping relationship between the configuration authorization and the context of the terminal device and the data transmission channel of the terminal device, respectively.
  • the time-frequency resource configured by the configuration authorization may be a time-frequency resource shared by the terminal device and other terminal devices.
  • the CU of the network device may send the inactive state I-RNTI to the DU of the network device.
  • the DU of the network device may establish a mapping relationship between the configuration grant and the I-RNTI of the terminal device.
  • the I-RNTI may be a unique identifier of a terminal device in an inactive state within a wireless network notification area (RAN-based notification area, RNA).
  • the configuration information of the PDCCU configured for the terminal equipment; the configuration information of the PDCCH can be used for sending feedback information of uplink data or scheduling PUSCH transmission, scheduling physical downlink shared control channel (physical downlink control channel, PDSCH) transmission and the like.
  • the configuration information of the PDCCH can be used for sending feedback information of uplink data or scheduling PUSCH transmission, scheduling physical downlink shared control channel (physical downlink control channel, PDSCH) transmission and the like.
  • the configuration information of the PDCCH includes, but is not limited to, resource location information, a period, a starting position, and the like of the PDCCH.
  • the PDCCH may schedule the transmission of physical layer signaling, such as acknowledgement (ACK) or non-acknowledgement (NACK) signaling, uplink grant for initial transmission, and uplink grant for retransmission at least one of the.
  • the PDCCH may also schedule the transmission of the PDSCH, and the information carried in the PDSCH includes but is not limited to one or more of downlink RRC signaling, downlink data, and timing advance commands.
  • the terminal equipment can perform uplink transmission and downlink transmission according to the scheduling of the PDCCH.
  • a temporary identity used for scrambling the PDCCH is a 32-bit wireless network temporary identity (radio network temporary identity, RNTI) used for scrambling the PDCCH.
  • the temporary identity may be a cell radio network temporary identity (cell radio network temporary identity, C-RNTI) of the terminal device.
  • the I-RNTI configured for the terminal device.
  • terminal device may also include other information, which is not limited by the embodiments of the present application, and will not be described one by one here.
  • the UE context establishment response message sent by the CU of the network device may include the context of the terminal device.
  • Small data transmission is performed in the RRC inactive state without entering the RRC connected state. It can be avoided to consider that the UE must enter the RRC connected state when performing data transmission, and in a special scenario, for example, when the UE performs small data transmission, the data transmission amount is not large, but may require multiple, discontinuous The UE needs to frequently switch between the RRC inactive state and the RRC connected state, which also results in frequent signaling of signaling. Therefore, a possible implementation method is to consider small data transmission in the RRC inactive state, and the terminal equipment There is no need to enter the RRC connected state. to save signaling overhead. In the inactive state based on RRC, the terminal performs small data transmission, which can be performed by means of RA-SDT.
  • an embodiment of the present application provides a communication method, including the following steps:
  • Step 601 The CU of the first network device sends an RRC release message (RRC Release) to the DU of the first network device.
  • RRC Release RRC release message
  • the first network device may be a source network device accessed by the terminal device in the RRC connection state.
  • the CU of the first network device determines the RRC release message sent to the DU of the first network device when the terminal device switches from the RRC connected state to the RRC inactive state.
  • the RRC Release message carries a suspend (suspend) configuration, which is used to instruct the terminal device to switch to the RRC inactive state.
  • the CU of the first network device sends, to the DU of the first network device, indication information for saving the DU context of the first network device.
  • Step 602 After receiving the RRC release message, the DU of the first network device saves the context of the terminal device.
  • the context may be stored by the first network device after receiving the indication information for storing the DU context, or may be the DU default storage context of the first network device).
  • the DU context of the first network device may include at least one of the following:
  • the small data transmission configuration authorizes the SDT-CG configuration
  • the small data configuration authorizing the CG configuration may include at least one of the following: indication information of CG time domain resources, indication information of CG frequency domain resources, and the like.
  • Small data transmission SDT-time alignment (time alignment, TA) configuration time synchronization timer SDT-(TA timer, TAT) for small data transmission.
  • the configuration may include at least one of the following: indication information of the mode (AM or UM) of the SDT-RLC, indication information of the length of the sequence number (sequence number, SN) of the RLC, etc.
  • Step 603 The DU of the first network device sends an RRC connection release (RRC Release) message to the terminal device.
  • RRC connection release RRC Release
  • Step 604 The terminal equipment switches from the RRC connected state to the RRC inactive state.
  • Step 605 Trigger a small data transmission process when the terminal device has data transmission.
  • the specific small data transmission process reference may be made to the transmission mode in the prior art, and details are not described herein again.
  • Step 606 The terminal device sends an RRC resume request message (RRC resume request) and uplink data (user data) to the second network device.
  • RRC resume request an RRC resume request message
  • uplink data user data
  • the uplink data can be carried by NAS message (NAS message).
  • the terminal device may initiate an RRC recovery procedure to the DU of the target network device after moving out of the coverage of the DU of the source network device and entering the coverage of the DU of the target network device.
  • the DU of the source network device needs to be switched to the DU of the target network device.
  • the RRC recovery request may carry the I-RNTI, so that the CU of the target network device can request the CU of the source network device for the context of the terminal device.
  • the terminal device may move out of the coverage of the CU of the source network device and enter the coverage of the CU of the target network device and the DU of the target network device, and then move to the CU of the target network device or the DU of the target network device Initiate the RRC recovery process.
  • the CU of the source network device needs to be switched to the CU of the target network device, and the DU of the source network device needs to be switched to the DU of the target network device.
  • the RRC recovery request may carry the I-RNTI, so that the CU of the target network device can request the CU of the source network device for the context of the terminal device. Therefore, the DU of the target network device can obtain the context of the terminal through the CU of the target network device.
  • Step 607 The second network device sends a UE context request (Retrieve UE context request) to the CU of the first network device.
  • the UE context request may include identity verification information of the terminal device, and the CU of the first network device combines its own security context and the verification information in the UE context request to perform Identity verification.
  • Step 608 The CU of the first network device sends a UE context request response (Retrieve UE context response) to the target network device.
  • the CU of the first network device after the CU of the first network device succeeds in identity verification, the CU of the first network device sends a UE context request response to the target network device.
  • the UE context request response may include all contexts.
  • the UE context request response may include: SDAP configuration, RLC configuration , PDCP configuration, RB configuration, etc.
  • the UE context request response may include part of the context of the terminal device.
  • the UE context request response may include: RLC configuration.
  • Step 609 The CU of the first network device sends a first message to the DU of the first network device.
  • the first message is used to instruct the DU of the first network device to release the context of the terminal device.
  • the CU of the first network device may send release indication information to the DU of the first network device after the identity verification is successful.
  • the CU of the first network device may send release indication information to the DU of the first network device.
  • Step 6010 The DU of the first network device releases the DU context of the terminal device.
  • the DU of the first network device may release the DU context of the terminal device after receiving the indication information.
  • the CU of the source network device determines that the terminal device initiates the resume process at the new base station, it can determine that the terminal device will not return to the coverage of the DU of the source network device. Therefore, the CU of the source network device can report to the source network
  • the DU of the device sends the indication information for releasing the context, which is beneficial for the DU to allocate resources to other terminals and improve the utilization rate of the DU resources.
  • an embodiment of the present application further provides a communication method, as shown in FIG. 7 , including the following steps:
  • Step 701 The terminal device sends a configuration authorization request to the first network device.
  • the configuration authorization request may be used to request the first network device to configure the small data transmission resources authorized by the configuration of the terminal device, for example, may be used to request TBS configuration, periodic configuration resources, and the resources may be used when the terminal device establishes an RRC connection state sent to the first network device.
  • step 701 is optional, and the first network device may also configure CG-SDT resources for the terminal in other ways.
  • Step 702 The terminal device determines at least one SSB.
  • the terminal device may determine at least one SSB.
  • the terminal device may determine SSB1, which is associated with the CG-SDT resource.
  • the terminal device may also determine SSB2, where SSB2 is not associated with the CG-SDT resource.
  • the terminal can determine whether the CG-SDT resource can be used for small data transmission based on the determined SSB associated with the CG-SDT resource. Therefore, it is avoided that the terminal device needs to separately indicate to the terminal device when the terminal device can use the CG-SDT resource for the CG-SDT resource for small data transmission.
  • Step 703 The first network device sends uplink synchronization indication information to the terminal device.
  • the terminal device adjusts the uplink synchronization according to the uplink synchronization indication information.
  • Step 704 The CU of the first network device sends the first indication information to the terminal device through the DU of the first network device.
  • the first indication information is used to indicate the first resource authorized by the configuration of the terminal device, and the first resource is associated with the first SSB; the first SSB is used for the terminal device in the inactive state , and determine whether to use the first resource to send data.
  • the first indication information may be carried by an RRC release message.
  • the terminal device may determine that the configuration authorization resource for transmitting small data is the first resource.
  • the terminal device After obtaining the first indication information, the terminal device can enter the RRC inactive state to save power consumption.
  • Step 705 The terminal determines that the first SSB is the reference SSB of the first resource according to the first resource and the association between the SSB and the CG-SDT resource.
  • the reference SSB of the first resource is used to determine whether the uplink synchronization of the first resource is valid. For example, when it is determined that the uplink synchronization of the first resource is valid, it is determined to use the first resource to send data; when it is determined that the uplink synchronization of the first resource is invalid, it is determined to release the first resource.
  • the RSRP of the first SSB when the RSRP of the first SSB is greater than or equal to a first threshold, it is determined that the uplink synchronization of the first resource is valid;
  • the first SSB is determined as the reference SSB of the first resource. It should be noted that even if the RSRP of SSB2 is greater than or equal to the first threshold, considering that SSB2 is not an SSB associated with the first resource, SSB2 cannot be used as a reference SSB of the first resource.
  • Step 706 The terminal device determines whether the uplink synchronization of the first resource is valid according to the reference SSB. If yes, go to step 707, if not, go to step 708.
  • the terminal device may be configured when the increase change of the RSRP of the first SSB is greater than or equal to the second threshold, or when the decrease change of the RSRP of the first SSB is greater than or equal to the third threshold , it is determined that the uplink synchronization of the first resource is invalid.
  • the second threshold or the third threshold is configured by the network device and sent to the terminal device in the RRC release message.
  • Step 707 The terminal device transmits (or sends) data to the first network device without using the first resource.
  • the terminal device may release the first resource.
  • Step 708 The terminal device performs a small data transmission process. Specifically, the terminal device transmits (or sends) data to the first network device by using the first resource.
  • the data sent by the terminal device to the first network device by using the first resource may be user data, or service data, etc., which is not limited herein.
  • Step 709 When the terminal device determines to switch to the second network device, the terminal device sends an RRC resume request message (resume request) to the second network device.
  • Step 7010 The second network device sends an RRC recovery message to the terminal device.
  • the RRC recovery message includes second indication information, where the second indication information is used to indicate a second resource authorized by the configuration of the terminal device, and the second resource is used for the terminal device in the inactive state. In and connected state, use the second resource to send data. That is, the second resource can be used in the RRC connected state of the terminal device.
  • the terminal device receives the RRC recovery message sent by the network device, and in some embodiments, the second resource may be the same as the first resource.
  • the terminal device After receiving the RRC recovery message, the terminal device enters the RRC connected state, and uses the second resource to send the second data to the second network device.
  • the second resource may be different from the first resource.
  • the terminal device may determine whether the uplink synchronization of the second resource is valid based on the method of determining whether the uplink synchronization of the first resource is valid.
  • the data may be sent to the second network device using the second resource.
  • step 7011 the CU of the first network device sends a first message to the DU of the first network device.
  • step 607 and step 608 may also be performed, which will not be repeated here.
  • Step 7012 The DU of the first network device releases the DU context of the terminal device.
  • an embodiment of the present application further provides a communication method, as shown in FIG. 8 , including the following steps:
  • Step 801 The terminal device sends a configuration authorization request to the second network device.
  • the configuration authorization request may be used to request the second network device to determine a configuration authorization small data transmission resource, and the resource may be used for the terminal device to transmit small data in the RRC connection state.
  • the configuration authorization request sent by the terminal device to the second network device may also be used to request the second network device to determine a second resource, where the second resource is used by the terminal device in the inactive state and connected In the state, use the second resource to send data.
  • the second resource is associated with a second SSB; the second SSB is used by the terminal device to determine whether to use the second resource to send data in an inactive state and an RRC connected state.
  • the terminal device may also request in advance the configuration-authorized small data transmission resources in the RRC inactive state. For details, refer to the manner in which the terminal device obtains the first resource above, and details are not described herein again.
  • the first resource may be the same as the second resource, or may be different, which is not limited herein.
  • step 801 is optional, and the second network device may also configure CG-SDT resources for the terminal in other ways.
  • Step 802 The terminal device determines at least one SSB.
  • the terminal device may determine at least one SSB.
  • the terminal device may determine SSB1, SSB3, the SSB1 is associated with the first resource, and SSB3 is associated with the second resource.
  • the terminal device may also determine SSB2, where SSB2 is not associated with the CG-SDT resource.
  • the terminal can determine whether the CG-SDT resource can be used for small data transmission based on the determined SSB associated with the CG-SDT resource. Therefore, it is avoided that the terminal device needs to separately indicate to the terminal device when the terminal device can use the CG-SDT resource for the CG-SDT resource for small data transmission.
  • Step 803 The second network device sends uplink synchronization indication information to the terminal device.
  • the terminal device adjusts the TA according to the uplink synchronization indication information.
  • Step 804 The CU of the second network device sends the first indication information to the terminal device through the DU of the second network device.
  • the first indication information is used to indicate the first resource authorized by the configuration of the terminal device, and the first resource is associated with the first SSB; the first SSB is used for the terminal device in the inactive state , and determine whether to use the first resource to send data.
  • the terminal device may determine that the configuration authorization resource for transmitting small data is the first resource.
  • the CU of the second network device sends the second indication information to the terminal device through the DU of the second network device.
  • the second indication information is used to indicate the second resource authorized by the configuration of the terminal device.
  • the second resource is associated with a second SSB; the second SSB is used by the terminal device to determine whether to use the second resource to send data in the connected state.
  • the second SSB is used for the terminal device to determine whether to use the second resource to send data in the connected state and the inactive state.
  • Step 805 The terminal device determines the second SSB as the reference SSB of the second resource according to the second resource and the association relationship between the SSB and the CG-SDT resource.
  • the reference SSB of the second resource is used to determine whether the uplink synchronization of the second resource is valid. For example, when it is determined that the uplink synchronization of the second resource is valid, it is determined to use the second resource to send data; when it is determined that the uplink synchronization of the second resource is invalid, it is determined to release the second resource.
  • the RSRP of the second SSB when the RSRP of the second SSB is greater than or equal to a first threshold, it is determined that the uplink synchronization of the second resource is valid;
  • the second SSB is determined as the reference SSB for the second resource. It should be noted that even if the RSRP of SSB2 is greater than or equal to the first threshold, considering that SSB2 is not an SSB associated with the second resource, SSB2 cannot be used as a reference SSB of the second resource.
  • the terminal device may determine the first SSB as the reference SSB of the first resource according to the first resource and the association relationship between the SSB and the CG-SDT resource.
  • the reference SSB of the first resource is used to determine whether the uplink synchronization of the first resource is valid. For example, when it is determined that the uplink synchronization of the first resource is valid, it is determined to use the first resource to send data; when it is determined that the uplink synchronization of the first resource is invalid, it is determined to release the first resource.
  • the RSRP of the first SSB when the RSRP of the first SSB is greater than or equal to a first threshold, it is determined that the uplink synchronization of the first resource is valid;
  • the first SSB is determined as the reference SSB. It should be noted that even if the RSRP of the second SSB is greater than or equal to the first threshold, considering that the second SSB is not an SSB associated with the first resource, the second SSB cannot be used as a reference SSB of the first resource.
  • Step 806 The terminal device determines whether the uplink synchronization of the second resource is valid according to the reference SSB of the second resource. If yes, go to step 808, if not, go to step 807.
  • the terminal device may be configured when the increase variation of the RSRP of the second SSB is greater than or equal to the second threshold, or when the decrease variation of the RSRP of the second SSB is greater than or equal to the third threshold , it is determined that the uplink synchronization of the second resource is invalid.
  • the second threshold or the third threshold is configured by the network device and sent to the terminal device in the RRC release message.
  • Step 807 The terminal device sends data to the second network device without using the second resource.
  • the terminal device determines that the TA is invalid, and the terminal device can release the second resource.
  • Step 808 The terminal device performs a small data transmission process. Specifically, the terminal device uses the second resource to send user data to the second network device.
  • Step 809 After determining to enter the RRC inactive state, the terminal device determines whether the uplink synchronization of the first resource is valid according to the reference SSB of the first resource. If yes, go to step 8011, if not, go to step 8010.
  • the terminal device may be configured when the increase change of the RSRP of the first SSB is greater than or equal to the second threshold, or when the decrease change of the RSRP of the first SSB is greater than or equal to the third threshold , it is determined that the uplink synchronization of the first resource is invalid.
  • the second threshold or the third threshold is configured by the network device and sent to the terminal device in the RRC release message.
  • Step 8010 The terminal device does not use the first resource to send data to the second network device.
  • the terminal device determines that the TA is invalid, and the terminal device can release the second resource.
  • Step 8011 The terminal device performs a small data transmission process. Specifically, the terminal device uses the first resource to send user data to the second network device.
  • the SSB associated with the configuration authorization resource is used as the reference SSB, so that the terminal device can know whether the TA is valid, so as to determine whether the configuration authorization resource indicated by the network device can be used.
  • the configuration authorization request initiated by the terminal can also be used to request the configuration of CG-SDT resources used in the RRC connected state, so that the terminal device in the inactive state, and the terminal device After switching to the RRC connection state, the configured CG-SDT resources can continue to be used. Therefore, the CG-SDT resources do not need to be configured again after the switching, and small data transmission can be performed more efficiently, whether during the switching process or switching. After that, small data can be transferred smoothly.
  • the apparatus 900 includes a centralized unit 901 and a distributed unit 902, wherein the centralized unit 901 may include Processing module 9010.
  • the centralized unit 901 further includes a sending module 9020 and a receiving module 9030 .
  • the processing module 9010 is configured to send the first indication information to the terminal device through the sending module 9020 via the distributed unit 902 of the first network device; the first indication information is used to instruct the terminal device An authorized first resource is configured, and the first resource is associated with the first SSB; the first SSB is used by the terminal device to determine whether to use the first resource to send data in an inactive state.
  • the processing module 9010 is used to send the context of the terminal device in the inactive state to the second network device through the sending module 9020; the processing module 9010 is used to send the first network device through the sending module 9020.
  • the distributed unit 902 of the device sends a first message, where the first message is used to instruct the distributed unit 902 of the first network device to release the context of the terminal device.
  • the processing module 9010 before sending the context of the terminal device in the inactive state to the second network device through the sending module 9020, further includes: a processing module 9010, used for receiving through the receiving module 9030 from the the context request of the terminal device of the second network device.
  • the processing module 9010 before sending the context of the terminal device in the inactive state to the second network device through the sending module 9020, further includes: a processing module 9010, configured to send the second network device to the second network device. Identity verification is successful.
  • the processing module 9010 is configured to send the second indication information to the terminal device through the distribution unit of the first network device through the sending module 9020; the second indication information is used to indicate the The second resource authorized by the configuration of the terminal device, where the second resource is used by the terminal device to send data using the second resource in the inactive state and the connected state.
  • the processing module 9010 of the centralized unit is configured to send the context of the terminal device in the inactive state to the second network device through the sending module 9020 of the centralized unit; the processing module 9010 of the centralized unit is configured to use In order to send a first message to the distributed unit of the first network device through the sending module 9020 of the centralized unit, the first message is used to instruct the distributed unit 902 of the first network device to release the terminal device. context.
  • the processing module 9010 of the centralized unit is used to send the context of the terminal device in the inactive state to the second network device through the sending module 9020 of the centralized unit, and also used to send the context of the terminal device in the inactive state to the second network device through the centralized unit.
  • the receiving module 9030 receives a context request request from the terminal device of the second network device.
  • the processing module 9010 of the centralized unit is used for sending the context of the terminal device in the inactive state to the second network device through the sending module 9020 of the centralized unit, and also for sending the context of the terminal device in the inactive state to the second network device.
  • the identity verification of the network device is successful.
  • the context includes one or more of the following: configuration authorization configured for the terminal device; configuration information of a physical downlink control channel configured for the terminal device; used for scrambling the physical The temporary identifier of the downlink control channel; the temporary identifier of the inactive wireless network configured for the terminal device; the configuration information of the radio link control layer of the radio bearer configured for the terminal device.
  • the terminal device in the inactive state is used to transmit data with the communication apparatus 900 .
  • FIG. 10 it is a schematic diagram of a communication apparatus according to an embodiment of the present application.
  • the apparatus is configured to implement various steps performed by the corresponding second network device or terminal device in the foregoing method embodiments.
  • the apparatus 1000 includes a processing module 1010 .
  • a sending module 1020 and a receiving module 1030 are also included.
  • the processing module 1010 is configured to send first indication information to the terminal device through the sending module 1020; the first indication information is used to indicate the The first resource authorized by the configuration of the terminal device, the first resource is associated with the first SSB; the first SSB is used by the terminal device to determine whether to use the first SSB in the inactive state of the terminal device The resource sends data.
  • the RSRP of the first SSB is used to determine whether the uplink synchronization of the first resource is invalid; when it is determined that the uplink synchronization of the first resource is valid , determining to use the first resource to send data; when determining that the uplink synchronization of the first resource fails, determining to release the first resource.
  • the RSRP of the first SSB when the RSRP of the first SSB is greater than or equal to a first threshold, it is determined that the uplink synchronization of the first resource is valid;
  • the increase change amount of the RSRP of the first SSB is greater than or equal to the second threshold, or when the decrease change amount of the RSRP of the first SSB is greater than or equal to the third threshold value, it is determined that the uplink synchronization of the first resource is invalid.
  • the context includes one or more of the following: configuration authorization configured for the terminal device; configuration information of the PDCCH configured for the terminal device; The temporary identifier used to scramble the PDCCH; the inactive I-RNTI configured for the terminal device; the configuration information of the RLC layer of the radio bearer configured for the terminal device.
  • the communication apparatus in FIG. 10 is taken as an example of a terminal device.
  • the processing module 1010 is configured to receive the first indication information sent by the centralized unit of the first network device through the distributed unit of the first network device through the receiving module 1030, the first indication information a first resource for instructing the terminal device to configure authorization, the first resource is associated with a first SSB; the processing module 1010 is configured to determine whether to use the first SSB in an inactive state according to the first SSB The first resource sends data.
  • the processing module 1010 is configured to receive, through the receiving module 1030, first indication information sent by the second network device, where the first indication information is used to instruct the terminal device to configure the authorized first resource, so The first resource is associated with the first SSB; the terminal device determines whether to use the first resource to send data according to the first SSB in an inactive state.
  • the second network device may be a network device after the terminal device is switched from the first network device. It may also be the network device before the terminal device is switched from the first network device.
  • the processing module 1010 is configured to, in an inactive state, determine whether the uplink synchronization of the first resource is invalid according to the reference signal power RSRP of the first SSB; after determining the first resource When the uplink synchronization of the first resource is valid, it is determined to use the first resource to send data; when it is determined that the uplink synchronization of the first resource is invalid, it is determined not to use the first resource to send data.
  • the processing module 1010 is configured to release the first resource when it is determined that the uplink synchronization of the first resource fails in an inactive state.
  • the processing module 1010 is configured to determine whether the uplink synchronization of the first resource is invalid according to the RSRP of the first SSB in an inactive state, including: in the RSRP of the first SSB When it is greater than or equal to the first threshold, it is determined that the uplink synchronization of the first resource is valid; when the increase and change of the RSRP of the first SSB is greater than or equal to the second threshold, or, when the RSRP of the first SSB increases When the reduction variation is greater than or equal to the third threshold, it is determined that the uplink synchronization of the first resource is invalid.
  • the processing module 1010 is configured to receive the second indication information sent by the centralized unit of the first network device through the distributed unit of the first network device through the receiving module 1030; the second indication information
  • the second resource for indicating configuration authorization of the terminal device, the second resource for configuration authorization is used for the terminal device to send data using the second resource in the inactive state and the connected state.
  • the processing module 1010 is configured to receive, through the receiving module 1030, second indication information sent by the second network device, where the second indication information is used to indicate the second resource authorized by the configuration of the terminal device , the second resource is used by the terminal device to send data by using the second resource in an inactive state and a connected state.
  • the processing module 1010 is configured to restore the context of the terminal device obtained through the second network device to the connected state, where the context of the terminal device is that the second network device receives data from the first network by the second network device. Obtained from a centralized unit of equipment.
  • the above-mentioned communication device 900 or the communication device 1000 may further include a storage unit, which is used to store data or instructions (also referred to as codes or programs), and each of the above-mentioned units may interact or be coupled with the storage unit to achieve corresponding method or function.
  • the processing module 9010 or the processing module 1010 may read data or instructions in the storage unit, so that the communication apparatus implements the methods in the above embodiments.
  • each unit in the above apparatus can be realized in the form of software calling through the processing element; also can all be realized in the form of hardware; some units can also be realized in the form of software calling through the processing element, and some units can be realized in the form of hardware.
  • each unit can be a separately established processing element, or can be integrated in a certain chip of the device to be implemented, and can also be stored in the memory in the form of a program, which can be called by a certain processing element of the device and execute the unit's processing. Function.
  • each step of the above-mentioned method or each of the above units may be implemented by an integrated logic circuit of hardware in the processor element, or may also be implemented in the form of software being invoked by the processing element.
  • a unit in any of the above apparatuses may be one or more integrated circuits configured to implement the above methods, eg, one or more application specific integrated circuits (ASICs), or, one or more Multiple microprocessors (digital singnal processors, DSPs), or, one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms.
  • ASICs application specific integrated circuits
  • DSPs digital singnal processors
  • FPGAs field programmable gate arrays
  • a unit in the apparatus can be implemented in the form of a processing element scheduler
  • the processing element can be a general-purpose processor, such as a central processing unit (central processing unit, CPU) or other processors that can invoke programs.
  • CPU central processing unit
  • these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • the above unit for receiving is an interface circuit of the apparatus for receiving signals from other apparatuses.
  • the receiving unit is an interface circuit used by the chip to receive signals from other chips or devices.
  • the above unit for transmitting is a kind of interface circuit of the apparatus for transmitting signals to other apparatuses.
  • the sending unit is an interface circuit used by the chip to send signals to other chips or devices.
  • FIG. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device is used to implement the operations of the first network device or the centralized unit in the first network device, the second network device or the terminal device in the above embodiment.
  • the communication device includes: an antenna 1110, a radio frequency device 1120, and a signal processing part 1130.
  • the antenna 1110 is connected to the radio frequency device 1120 .
  • the radio frequency apparatus 1120 receives the information sent by the network equipment or other terminal equipment through the antenna 1110, and sends the information sent by the network equipment or other terminal equipment to the signal processing part 1130 for processing.
  • the signal processing part 1130 processes the information of the terminal equipment and sends it to the radio frequency device 1120, and the radio frequency device 1120 processes the information of the terminal equipment and sends it to the network equipment or other terminal equipment through the antenna 1110.
  • the communication device includes: an antenna 1110 , a radio frequency device 1120 , and a signal processing part 1130 .
  • the antenna 1110 is connected to the radio frequency device 1120 .
  • the radio frequency apparatus 1120 receives the information sent by the terminal equipment through the antenna 1110, and sends the information sent by the terminal equipment to the signal processing part 1130 for processing.
  • the signal processing part 1130 processes the information of the network equipment and sends it to the radio frequency device 1120.
  • the radio frequency device 1120 processes the information of the network equipment and sends it to the first terminal or other terminal equipment through the antenna 1110.
  • the signal processing part 1130 is used to realize the processing of each communication protocol layer of the data.
  • the signal processing part 1130 may be a subsystem of the communication device, and the communication device may also include other subsystems, such as a central processing subsystem, for implementing the processing of the communication device operating system and the application layer; The system is used to realize the connection with other devices.
  • the signal processing part 1130 may be a separately provided chip.
  • the above devices may be located in the signal processing part 1130 .
  • the signal processing section 1130 may include one or more processing elements 1131 , eg, including a main control CPU and other integrated circuits, and an interface circuit 1133 .
  • the signal processing part 1130 may further include a storage element 1132 .
  • the storage element 1132 is used for storing data and programs, and the program for executing the method performed by the communication device in the above method may or may not be stored in the storage element 1132, for example, stored in a memory outside the signal processing part 1130 During use, the signal processing part 1130 loads the program into the cache for use.
  • Interface circuitry 1133 is used to communicate with the device.
  • the above apparatus can be located in the signal processing part 1130, and the signal processing part 1130 can be realized by a chip, and the chip includes at least one processing element and an interface circuit, wherein the processing element is used to perform each step of any one of the methods performed by the above communication device, and the interface Circuits are used to communicate with other devices.
  • the unit for implementing each step in the above method may be implemented in the form of a processing element scheduler.
  • the apparatus includes a processing element and a storage element, and the processing element calls the program stored in the storage element to execute the above method embodiments.
  • the storage element may be a storage element in which the processing element is on the same chip, that is, an on-chip storage element.
  • the program for performing the method performed by the communication device in the above method may be in a storage element on a different chip from the processing element, ie, an off-chip storage element.
  • the processing element calls or loads the program from the off-chip storage element on the on-chip storage element to call and execute the method performed by the communication device (first network device, second network device or terminal device) in the above method embodiments.
  • the unit of the communication device to implement each step in the above method may be configured as one or more processing elements, and these processing elements are provided on the signal processing part 1130.
  • the processing elements here may be integrated circuits, such as : One or more ASICs, or, one or more DSPs, or, one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form chips.
  • the units that implement the steps in the above method can be integrated together and implemented in the form of a system-on-a-chip (SOC), and the SOC chip is used to implement the above method.
  • SOC system-on-a-chip
  • At least one processing element and a storage element may be integrated in the chip, and the method executed by the above communication device may be implemented in the form of a program stored in the storage element being invoked by the processing element; or, at least one integrated circuit may be integrated in the chip for implementing the above communication
  • the above apparatus may include at least one processing element and an interface circuit, wherein the at least one processing element is configured to execute the method performed by any communication device provided in the above method embodiments.
  • the processing element can execute part or all of the steps performed by the communication device in the first way: by calling the program stored in the storage element; or in the second way: by combining the instructions with the integrated logic circuit of the hardware in the processor element part or all of the steps performed by the communication device; of course, part or all of the steps performed by the communication device may also be performed in combination with the first and second methods.
  • the processing elements here are the same as those described above, and may be a general-purpose processor, such as a CPU, or one or more integrated circuits configured to implement the above method, such as: one or more ASICs, or one or more microprocessors DSP, or, one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms.
  • the storage element may be one memory or a collective term for multiple storage elements.
  • the memory in this embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be random access memory (RAM), which acts as an external cache.
  • RAM random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • Embodiments of the present application further provide a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a computer, implements any of the above-mentioned methods applied to the first network device, the second network device, or the terminal device. method described in the example.
  • Embodiments of the present application further provide a computer program product, which implements the method described in any of the above method embodiments applied to the first network device, the second network device, or the terminal device when the computer program product is executed by a computer.
  • At least one item(s) below or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s).
  • at least one (a) of a, b, or c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c can be single or multiple.
  • the above embodiments may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • software When implemented in software, it can be implemented in whole or in part in the form of a computer program product.
  • a computer program product includes one or more computer programs. When the computer program is loaded and executed on the computer, all or part of the processes or functions described in the embodiments of the present application are generated.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer program can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program can be transferred from a website site, computer, server or data center via wired (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.) means to transmit to another website site, computer, server or data center.
  • a computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that includes an integration of one or more available media.
  • Useful media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, high-density digital video disc (DVD)), or semiconductor media (eg, solid state disk (SSD)) )Wait.
  • An embodiment of the present application further provides a processing apparatus, including a processor and an interface; the processor is configured to execute the method described in any of the foregoing method embodiments applied to the first network device, the second network device, or the terminal device.
  • the above-mentioned processing device may be a chip, and the processor may be implemented by hardware or software.
  • the processor When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor It can be a general-purpose processor, which can be realized by reading software codes stored in a memory, and the memory can be integrated in the processor or located outside the processor and exist independently.

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Abstract

本申请提供一种通信方法及装置，该方法包括第一网络设备的集中式单元通过所述第一网络设备的分布式单元向终端设备发送第一指示信息，所述第一指示信息用于指示所述终端设备配置授权的第一资源，所述第一资源与第一同步信号广播信道块SSB关联；所述第一SSB用于所述终端设备在所述非激活态下，确定是否使用所述第一资源发送数据。使得处于非激活态的终端设备在进行非激活态的小数据传输时，可以通过SSB确定配置授权的第一资源是否有效，从而实现更快的进行非激活态下终端设备的小数据传输。

Description

一种通信方法及装置
相关申请的交叉引用
本申请要求在2021年03月31日提交中国专利局、申请号为202110349588.1、申请名称为“一种通信方法及装置”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
本申请实施例涉及通信技术领域，尤其涉及一种通信方法及装置。
背景技术
在第五代(5th generation，5G)的讨论中，标准中决定引入一种新的无线资源控制(radio resource control，RRC)状态，非激活态(非激活state)，终端设备与网络暂停无线资源控制(radio resource control，RRC)连接，从而达到与空闲态一样的省电效果。不同与空闲态的是：在非激活态下，终端设备和接入网设备保存终端设备的上下文。当终端设备需要进入连接态时，比如，终端设备有上行数据需要发送，或者，网络设备寻呼终端设备进入连接态时，终端设备基于保存的终端设备上下文进入到连接状态，从而减少时延，节省信令开销。
采用这种方式，空闲态或非激活态的终端设备需要进入连接态来与网络设备进行数据传输，对于很小且不频繁传输的数据包来说，仍会导致不必要的功耗和信令开销。因此，一种可能的方式是，在非激活态下进行小数据传输，终端无需进入连接态。
考虑到终端从原保存上下文的接入网设备的覆盖范围离开后，需要向新的接入网设备发起恢复RRC流程，在该场景下，如何合理的管理终端的资源(例如，上下文)，尤其是针对接入网设备包括集中单元(centralized unit，CU)和一个或多个分布单元(distributed unit，DU)，即CU-DU分离的情况下，如何保证在终端移动过程中，小数据传输不受影响，目前仍在讨论中。
发明内容
本申请实施例提供一种通信方法及装置，使得终端设备在移动过程中，提高终端设备的小数据传输的性能。
第一方面，本申请提供一种通信方法，包括：第一网络设备的集中式单元通过所述第一网络设备的分布式单元向终端设备发送第一指示信息；所述第一指示信息用于指示所述终端设备配置授权的第一资源，所述第一资源与第一同步信号广播信道块(synchronization signal block，SSB)关联；所述第一SSB用于所述终端设备在非激活态下，确定是否使用所述第一资源发送数据。
通过上述方法，在第一网络设备为终端设备指示配置授权的第一资源时，可以通过SSB关联相应的资源，例如，通过第一SSB关联第一资源，从而，终端设备可以在非激活态下，通过第一资源关联的第一SSB，确定是否使用第一资源发送数据，避免了网络设备为终端 设备额外发送信令指示终端设备何时使用配置授权的资源进行小数据传输，另外，终端设备也无需进入连接态接收相关的信令，提高了终端设备在非激活态下进行小数据传输的效率，降低终端设备在非激活态下进行小数据传输的时延。
一种可能的实现方式，所述第一SSB用于所述终端设备在所述非激活态下，确定是否使用所述第一资源发送数据，包括：所述第一SSB的参考信号接收功率(reference signal receiving power,RSRP)用于确定所述第一资源的上行同步是否失效；在确定所述第一资源的上行同步有效时，确定使用所述第一资源发送数据；在确定所述第一资源的上行同步失效时，确定不使用所述第一资源发送数据。
通过上述方法，根据第一SSB的上行同步是否失效，确定第一SSB相关联的配置授权的小数据传输的第一资源是否可以用于传输终端设备在非激活态下的小数据。从而，可以减少终端设备与第一网络设备之间的信令交互，提高在非激活态下的小数据的传输性能，降低传输时延。
可选的，在确定所述第一资源的上行同步失效时，确定释放所述第一资源。从而，终端设备可以及时的释放相应的资源，终端设备避免使用失效的资源进行小数据传输，提高终端设备传输的成功率。
一种可能的实现方式，所述第一SSB的RSRP用于确定所述第一资源的上行同步是否失效，包括：在所述第一SSB的RSRP大于或等于第一阈值时，确定所述第一资源的上行同步有效；在所述第一SSB的RSRP的增加变化量大于或等于第二阈值时，或者，在所述第一SSB的RSRP的减少变化量大于或等于第三阈值时，确定所述第一资源的上行同步失效。
通过上述方法，可以根据第一SSB的RSRP，确定第一SSB是否失效，从而，相应的确定出第一SSB相关联的配置授权的小数据传输的第一资源是否可以用于传输终端设备在非激活态下的小数据。通过确定SSB失效的方式，及SSB关联的配置授权的资源的方式，可以降低终端确定传输资源是否有效的复杂度，提高传输效率。
一种可能的实现方式，所述第一网络设备的集中式单元通过所述第一网络设备的分布式单元向所述终端设备发送第二指示信息；所述第二指示信息用于指示所述终端设备的配置授权的第二资源，所述第二资源用于所述终端设备在所述非激活态和连接态下，使用所述第二资源发送数据。
通过上述方法，通过指示的第二资源，使得终端设备在非激活态和连接态之间切换过程中，无论是处于非激活态还是连接态，都可以使用第二资源进行小数据传输，避免切换过程对小数据传输的影响，无需在切换后重新为终端设备配置相应的资源，提高了终端设备传输小数据的效率和性能。
一种可能的实现方式，所述第一网络设备的集中式单元向第二网络设备发送处于非激活态的终端设备的上下文；所述第一网络设备的集中式单元向所述第一网络设备的分布式单元发送第一消息，所述第一消息用于指示所述第一网络设备的分布式单元释放所述终端设备的上下文。
通过上述方法，第一网络设备的集中式单元向第二网络设备发送处于非激活态的终端设备的上下文的过程，第一网络设备可以确定当前终端设备切换至第二网络设备，从而，及时通知第一网络设备的分布式单元释放终端设备的上下文，使得第一网络设备的分布式单元可以在终端设备进行小数据传输过程中，随着终端设备切换至第二网络设备，及时释 放所述终端设备的上下文，提高第一网络设备的分布式单元对所述终端设备的上下文相应的。
资源的利用率，提高整体的网络性能。
一种可能的实现方式，所述第一网络设备的集中式单元向第二网络设备发送处于非激活态的终端设备的上下文之前，还包括：所述第一网络设备的集中式单元接收来自所述第二网络设备的所述终端设备的上下文索取请求。
通过上述方法，第一网络设备可以基于第二网络设备发送的终端设备的上下文索取请求，确定第二网络设备为终端设备待切换的网络设备，从而，有利于第一网络设备对终端设备的上下文进行管理，在保证终端设备在切换过程中可以顺利传输小数据的同时，节省资源的开销。
一种可能的实现方式，所述第一网络设备的集中式单元向第二网络设备发送处于非激活态的终端设备的上下文之前，还包括：所述第一网络设备的集中式单元对所述第二网络设备进行身份校验成功。
通过上述方法，第一网络设备的集中式单元对所述第二网络设备进行身份校验成功后，再指示第一网络设备的分布式单元对所述终端设备的上下文进行释放，保证第二网络设备的安全性的前提下，即终端设备可以成功至第二网络设备的前提下，节省资源的开销，避免可能导致终端设备频繁切换网络设备的问题。
一种可能的实现方式，所述上下文包括以下一项或多项：
为所述终端设备配置的配置授权；
为所述终端设备配置的物理下行控制信道(physical downlink control channel，PDCCH)的配置信息；
用于加扰所述PDCCH的临时标识；
为所述终端设备配置的非激活态无线网络临时标识(inactive radio network temporary identity，I-RNTI)；
为所述终端设备配置的无线承载的无线链路控制(radio link control，RLC)层的配置信息。
第二方面，本申请提供一种通信方法，第二网络设备向终端设备发送第一指示信息；所述第一指示信息用于指示所述终端设备的配置授权的第一资源，所述第一资源与第一SSB关联；所述第一SSB用于所述终端设备在所述终端设备的非激活态下，确定是否使用所述第一资源发送数据。
需要说明的是，第二网络设备可以是终端设备从第一网络设备切换后的网络设备。也可以是终端设备从第一网络设备切换前的网络设备。通过上述方法，在第二网络设备为终端设备指示配置授权的第一资源时，可以通过SSB关联相应的资源，例如，通过第一SSB关联第一资源，从而，终端设备可以在非激活态下，通过第一资源关联的第一SSB，确定是否使用第一资源发送数据，避免了网络设备为终端设备额外发送信令指示终端设备何时使用配置授权的资源进行小数据传输，另外，终端设备也无需进入连接态接收相关的信令，提高了终端设备在非激活态下进行小数据传输的效率，降低终端设备在非激活态下进行小数据传输的时延。
一种可能的实现方式，所述第一SSB用于所述终端设备在所述非激活态下，确定是否使用所述第一资源发送数据，包括：所述第一SSB的RSRP用于确定所述第一资源的上行 同步是否失效；在确定所述第一资源的上行同步有效时，确定使用所述第一资源发送数据；在确定所述第一资源的上行同步失效时，确定释放所述第一资源。
一种可能的实现方式，所述第一SSB的RSRP用于确定所述第一资源的上行同步是否失效，包括：在所述第一SSB的RSRP大于或等于第一阈值时，确定所述第一资源的上行同步有效；在所述第一SSB的RSRP的增加变化量大于或等于第二阈值时，或者，在所述第一SSB的RSRP的减少变化量大于或等于第三阈值时，确定所述第一资源的上行同步失效。
一种可能的实现方式，所述第二网络设备向所述终端设备发送第二指示信息，所述第二指示信息用于指示所述终端设备的配置授权的第二资源，所述第二资源用于所述终端设备在所述非激活态和连接态下，使用所述第二资源发送数据。
通过上述方法，通过指示的第二资源，使得终端设备在非激活态和连接态之间切换过程中，无论是处于非激活态还是连接态，都可以使用第二资源进行小数据传输，避免切换过程对小数据传输的影响，无需在切换后重新为终端设备配置相应的资源，提高了终端设备传输小数据的效率和性能。
一种可能的实现方式，所述第二网络设备接收来自第一网络设备的集中式单元的处于非激活态的终端设备的上下文，所述上下文用于所述第二网络设备为所述终端设备恢复连接态。
通过上述方法，第二网络设备在确定当前终端设备从非激活态切换至连接态时，第二网络设备可以向切换前的第一网络设备的集中式单元获取终端设备的上下文，使得终端设备在非激活态切换至连接态的过程中，无需重新发起接入，并可以基于第二网络设备配置的第二资源进行小数据传输，避免终端设备的状态切换过程对小数据传输的影响。
一种可能的实现方式，所述上下文包括以下一项或多项：为所述终端设备配置的配置授权；为所述终端设备配置的PDCCH的配置信息；用于加扰所述PDCCH的临时标识；为所述终端设备配置的非激活态I-RNTI；为所述终端设备配置的无线承载的RLC层的配置信息。
第三方面，本申请提供一种通信方法，终端设备通过第一网络设备的分布式单元接收所述第一网络设备的集中式单元发送的第一指示信息，所述第一指示信息用于指示所述终端设备配置授权的第一资源，所述第一资源与第一SSB关联；所述终端设备在非激活态下，根据所述第一SSB确定是否使用所述第一资源发送数据。
通过上述方法，终端设备可以根据第一网络设备为终端设备指示配置授权的第一资源，及SSB关联相应的资源，例如，通过第一SSB关联第一资源，在非激活态下，通过第一资源关联的第一SSB，确定是否使用第一资源发送数据，避免了网络设备为终端设备额外发送信令指示终端设备何时使用配置授权的资源进行小数据传输，另外，终端设备也无需进入连接态接收相关的信令，提高了终端设备在非激活态下进行小数据传输的效率，降低终端设备在非激活态下进行小数据传输的时延。
第四方面，一种通信方法，终端设备接收第二网络设备发送的第一指示信息，所述第一指示信息用于指示所述终端设备配置授权的第一资源，所述第一资源与第一SSB关联；所述终端设备在非激活态下，根据所述第一SSB确定是否使用所述第一资源发送数据。
需要说明的是，第二网络设备可以是终端设备从第一网络设备切换后的网络设备。也可以是终端设备从第一网络设备切换前的网络设备。
通过上述方法，终端设备可以从第一网络设备切换至第二网络设备后，根据第二网络设备为终端设备指示配置授权的第一资源，及SSB关联相应的资源，例如，通过第一SSB关联第一资源，在非激活态下，通过第一资源关联的第一SSB，确定是否使用第一资源发送数据，提高了终端设备在非激活态下进行小数据传输的效率，降低终端设备在非激活态下进行小数据传输的时延。另外，终端设备可以从第二网络设备切换至第一网络设备后，仍根据第二网络设备为终端设备配置的第一资源，确定是否可以进行小数据传输，而无需第一网络设备再次配置相应的配置授权的小数据资源，提高终端设备传输小数据的性能。
结合第三方面或第四方面，一种可能的实现方式，所述终端设备在非激活态下，根据所述第一SSB确定是否使用所述第一资源发送数据，包括：所述终端设备根据所述第一SSB的参考信号功率RSRP，确定所述第一资源的上行同步是否失效；所述终端设备在确定所述第一资源的上行同步有效时，确定使用所述第一资源发送数据；所述终端设备在确定所述第一资源的上行同步失效时，确定不使用所述第一资源发送数据。
结合第三方面或第四方面，一种可能的实现方式，所述终端设备在确定所述第一资源的上行同步失效时，释放所述第一资源。
结合第三方面或第四方面，一种可能的实现方式，所述终端设备根据所述第一SSB的RSRP，确定所述第一资源的上行同步是否失效，包括：所述终端设备在所述第一SSB的RSRP大于或等于第一阈值时，确定所述第一资源的上行同步有效；所述终端设备在所述第一SSB的RSRP的增加变化量大于或等于第二阈值时，或者，在所述第一SSB的RSRP的减少变化量大于或等于第三阈值时，确定所述第一资源的上行同步失效。
结合第三方面，一种可能的实现方式，终端设备通过第一网络设备的分布式单元接收所述第一网络设备的集中式单元发送的第二指示信息；所述第二指示信息用于指示所述终端设备的配置授权的第二资源，所述第二资源用于所述终端设备在所述非激活态和连接态下，使用所述第二资源发送数据。
结合第三方面和/或第四方面，一种可能的实现方式，所述终端设备接收所述第二网络设备发送第二指示信息，所述第二指示信息用于指示所述终端设备的配置授权的第二资源，所述第二资源用于所述终端设备在所述非激活态和连接态下，使用所述第二资源发送数据。
通过上述方法，通过指示的第二资源，使得终端设备在非激活态和连接态之间切换过程中，无论是处于非激活态还是连接态，都可以使用第二资源进行小数据传输，避免切换过程对小数据传输的影响，无需在切换后重新为终端设备配置相应的资源，提高了终端设备传输小数据的效率和性能。
结合第三方面和/或第四方面，一种可能的实现方式，所述终端设备通过所述第二网络设备获得的终端设备的上下文恢复至连接态，所述终端设备的上下文为所述第二网络设备通过接收来自第一网络设备的集中式单元获得的。
第五方面，本申请提供一种通信方法，第一网络设备的集中式单元向第二网络设备发送处于非激活态的终端设备的上下文；所述第一网络设备的集中式单元向所述第一网络设备的分布式单元发送第一消息，所述第一消息用于指示所述第一网络设备的分布式单元释放所述终端设备的上下文。
通过上述方法，第一网络设备的集中式单元向第二网络设备发送处于非激活态的终端设备的上下文的过程，第一网络设备可以确定当前终端设备切换至第二网络设备，从而，及时通知第一网络设备的分布式单元释放终端设备的上下文，使得第一网络设备的分布式 单元可以在终端设备进行小数据传输过程中，随着终端设备切换至第二网络设备，及时释放所述终端设备的上下文，提高第一网络设备的分布式单元对所述终端设备的上下文相应的资源的利用率，提高整体的网络性能。
一种可能的实现方式，所述第一网络设备的集中式单元向第二网络设备发送处于非激活态的终端设备的上下文之前，还包括：所述第一网络设备的集中式单元接收来自所述第二网络设备的所述终端设备的上下文索取请求。
通过上述方法，第一网络设备可以基于第二网络设备发送的终端设备的上下文索取请求，确定第二网络设备为终端设备待切换的网络设备，从而，有利于第一网络设备对终端设备的上下文进行管理，在保证终端设备在切换过程中可以顺利传输小数据的同时，节省资源的开销。
一种可能的实现方式，所述第一网络设备的集中式单元向第二网络设备发送处于非激活态的终端设备的上下文之前，还包括：所述第一网络设备的集中式单元对所述第二网络设备进行身份校验成功。
通过上述方法，第一网络设备的集中式单元对所述第二网络设备进行身份校验成功后，再指示第一网络设备的分布式单元对所述终端设备的上下文进行释放，保证第二网络设备的安全性的前提下，即终端设备可以成功至第二网络设备的前提下，节省资源的开销，避免可能导致终端设备频繁切换网络设备的问题。
一种可能的实现方式，所述上下文包括以下一项或多项：
为所述终端设备配置的配置授权；
为所述终端设备配置的PDCCH的配置信息；
用于加扰所述PDCCH的临时标识；
为所述终端设备配置的非激活态无线网络临时标识I-RNTI；
为所述终端设备配置的无线承载的RLC层的配置信息。
一种可能的实现方式，所述处于非激活态的终端设备用于与所述第一网络设备传输数据。
第六方面，本申请提供一种通信装置，应用于第一网络设备，第一网络设备可以包括集中式单元和分布式单元。其中，集中式单元可以包括处理模块、发送模块和接收模块。
在一些实施例中，集中式单元的处理模块，用于通过集中式单元的发送模块经所述第一网络设备的分布式单元向终端设备发送第一指示信息；所述第一指示信息用于指示所述终端设备配置授权的第一资源，所述第一资源与第一SSB关联；所述第一SSB用于所述终端设备在非激活态下，确定是否使用所述第一资源发送数据。
一种可能的实现方式，所述集中式单元的处理模块，用于通过集中式单元的发送模块经向第二网络设备发送处于非激活态的终端设备的上下文；集中式单元的处理模块，用于通过集中式单元的发送模块向所述第一网络设备的分布式单元发送第一消息，所述第一消息用于指示所述第一网络设备的分布式单元释放所述终端设备的上下文。
一种可能的实现方式，所述集中式单元的处理模块通过集中式单元的发送模块向第二网络设备发送处于非激活态的终端设备的上下文之前，还用于通过集中式单元的接收模块接收来自所述第二网络设备的所述终端设备的上下文索取请求。
一种可能的实现方式，集中式单元的处理模块，通过集中式单元的发送模块向第二网络设备发送处于非激活态的终端设备的上下文之前，还用于对所述第二网络设备进行身份 校验成功。
在另一些实施例中，集中式单元的处理模块，用于通过集中式单元的发送模块向第二网络设备发送处于非激活态的终端设备的上下文；集中式单元的处理模块，用于通过集中式单元的发送模块向所述第一网络设备的分布式单元发送第一消息，所述第一消息用于指示所述第一网络设备的分布式单元释放所述终端设备的上下文。
一种可能的实现方式，集中式单元的处理模块，用于通过集中式单元的发送模块向第二网络设备发送处于非激活态的终端设备的上下文之前，还用于通过集中式单元的接收模块接收来自所述第二网络设备的所述终端设备的上下文索取请求。
一种可能的实现方式，集中式单元的处理模块，用于通过集中式单元的发送模块向第二网络设备发送处于非激活态的终端设备的上下文之前，还用于对所述第二网络设备进行身份校验成功。
一种可能的实现方式，所述上下文包括以下一项或多项：为所述终端设备配置的配置授权；为所述终端设备配置的物理下行控制信道的配置信息；用于加扰所述物理下行控制信道的临时标识；
为所述终端设备配置的非激活态无线网络临时标识；为所述终端设备配置的无线承载的无线链路控制层的配置信息。
一种可能的实现方式，所述处于非激活态的终端设备用于与所述第一网络设备传输数据。
第七方面，本申请提供一种通信装置，应用于第二网络设备，第二网络设备可以包括处理模块、发送模块和接收模块。处理模块，用于通过发送模块向终端设备发送第一指示信息；所述第一指示信息用于指示所述终端设备的配置授权的第一资源，所述第一资源与第一SSB关联；所述第一SSB用于所述终端设备在所述终端设备的非激活态下，确定是否使用所述第一资源发送数据。
结合第六方面或第七方面，一种可能的实现方式，所述第一SSB的RSRP用于确定所述第一资源的上行同步是否失效；在确定所述第一资源的上行同步有效时，确定使用所述第一资源发送数据；在确定所述第一资源的上行同步失效时，确定释放所述第一资源。
结合第六方面或第七方面，一种可能的实现方式，在所述第一SSB的RSRP大于或等于第一阈值时，确定所述第一资源的上行同步有效；在所述第一SSB的RSRP的增加变化量大于或等于第二阈值时，或者，在所述第一SSB的RSRP的减少变化量大于或等于第三阈值时，确定所述第一资源的上行同步失效。
结合第六方面或第七方面，一种可能的实现方式，集中式单元的处理模块，用于通过集中式单元的发送模块经所述第一网络设备的分布式单元向所述终端设备发送第二指示信息；所述第二指示信息用于指示所述终端设备的配置授权的第二资源，所述第二资源用于所述终端设备在所述非激活态和连接态下，使用所述第二资源发送数据。
结合第六方面或第七方面，一种可能的实现方式，所述上下文包括以下一项或多项：
为所述终端设备配置的配置授权；
为所述终端设备配置的PDCCH的配置信息；
用于加扰所述PDCCH的临时标识；
为所述终端设备配置的非激活态无线网络临时标识I-RNTI；
为所述终端设备配置的无线承载的RLC层的配置信息。
第八方面，本申请提供一种通信装置，应用于终端设备或终端设备的芯片。其中，该通信装置可以包括处理模块、接收模块和发送模块。
在一些实施例中，所述处理模块，用于通过接收模块经第一网络设备的分布式单元接收所述第一网络设备的集中式单元发送的第一指示信息，所述第一指示信息用于指示所述终端设备配置授权的第一资源，所述第一资源与第一SSB关联；所述处理模块，用于在非激活态下，根据所述第一SSB确定是否使用所述第一资源发送数据。
在另一些实施例中，所述处理模块，用于通过接收模块接收第二网络设备发送的第一指示信息，所述第一指示信息用于指示所述终端设备配置授权的第一资源，所述第一资源与第一SSB关联；所述终端设备在非激活态下，根据所述第一SSB确定是否使用所述第一资源发送数据。需要说明的是，第二网络设备可以是终端设备从第一网络设备切换后的网络设备。也可以是终端设备从第一网络设备切换前的网络设备。
一种可能的实现方式，所述处理模块，用于在非激活态下，根据所述第一SSB的参考信号功率RSRP，确定所述第一资源的上行同步是否失效；在确定所述第一资源的上行同步有效时，确定使用所述第一资源发送数据；在确定所述第一资源的上行同步失效时，确定不使用所述第一资源发送数据。
一种可能的实现方式，所述处理模块，用于在非激活态下，确定所述第一资源的上行同步失效时，释放所述第一资源。
一种可能的实现方式，所述处理模块，用于在非激活态下，在所述第一SSB的RSRP大于或等于第一阈值时，确定所述第一资源的上行同步有效；在所述第一SSB的RSRP的增加变化量大于或等于第二阈值时，或者，在所述第一SSB的RSRP的减少变化量大于或等于第三阈值时，确定所述第一资源的上行同步失效。
一种可能的实现方式，所述处理模块，用于通过接收模块经第一网络设备的分布式单元接收所述第一网络设备的集中式单元发送的第二指示信息；所述第二指示信息用于指示所述终端设备的配置授权的第二资源，所述配置授权的第二资源用于所述终端设备在所述非激活态和连接态下，使用所述第二资源发送数据。
一种可能的实现方式，所述处理模块，用于通过接收模块接收所述第二网络设备发送第二指示信息，所述第二指示信息用于指示所述终端设备的配置授权的第二资源，所述第二资源用于所述终端设备在所述非激活态和连接态下，使用所述第二资源发送数据。
一种可能的实现方式，所述处理模块，用于通过所述第二网络设备获得的终端设备的上下文恢复至连接态，所述终端设备的上下文为所述第二网络设备通过接收来自第一网络设备的集中式单元获得的。
第九方面，本申请实施例提供一种通信装置，包括处理器和存储器，该存储器用于存储计算机执行指令，当该装置运行时，该处理器执行该存储器存储的该计算机执行指令，以使该装置执行如上述第一方面或第五方面的各实现方法中的任意方法。
第十方面，本申请实施例提供一种通信装置，包括处理器和存储器，该存储器用于存储计算机执行指令，当该装置运行时，该处理器执行该存储器存储的该计算机执行指令，以使该装置执行如上述第二方面各实现方法中的任意方法。
第十一方面，本申请实施例提供一种通信装置，包括处理器和存储器，该存储器用于存储计算机执行指令，当该装置运行时，该处理器执行该存储器存储的该计算机执行指令，以使该装置执行如上述第三方面或第四方面各实现方法中的任意方法。
第十二方面，本申请实施例还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述第一方面至第五方面各实现方法中的任意方法。
第十三方面，本申请实施例还提供一种计算机程序产品，该计算机产品包括计算机程序，当计算机程序运行时，使得上述第一方面至第五方面的各实现方法中的任意方法被执行。
第十四方面，本申请实施例还提供一种芯片系统，包括：处理器，用于执行上述第一方面至第五方面的各实现方法中的任意方法。
第十五方面，本申请实施例还提供一种通信系统，包括如第六方面或第九方面中的第一网络设备，或包括如第七方面或第十方面中的第二网络设备，或包括如第八方面或第十一方面中的终端设备。
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图1-图2为本申请实施例适用的一种网络架构示意图；
图3a为一种网络架构对应的协议栈的示意图；
图3b为本申请实施例适用的一种网络架构示意图；
图4a为本申请实施例适用的一种网络架构示意图；
图4b为一种终端设备从RRC非激活态恢复至RRC连接态的方法的流程示意图；
图5为一种上下文建立方法的流程示意图；
图6为本申请实施例提供的一种通信方法的流程示意图；
图7为本申请实施例提供的一种通信方法的流程示意图；
图8为本申请实施例提供的一种通信方法的流程示意图；
图9为本申请实施例提供的一种通信装置示意图；
图10为本申请实施例提供的一种通信装置示意图；
图11为本申请实施例提供的一种通信设备示意图。
具体实施方式
以下，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。
本申请实施例的技术方案可以应用于各种通信系统，例如：第五代移动通信(the 5th Generation mobile communication technology，5G)系统(例如新无线(New Radio，NR))、长期演进(Long Term Evolution，LTE)系统、LTE频分双工(Frequency Division Duplex，FDD)系统、LTE时分双工(Time Division Duplex，TDD)等，在此不做限制。本申请实施例描述的系统架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，只要该通信系统的无线接入网设备存在CU-DU分离架构或者等同于CU-DU分离架构功能的架构，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
图1为本申请实施例适用的一种通信系统的网络架构示意图。
如图1所示，该通信系统包括终端设备1301、1302和网络设备。
终端设备可接入到无线网络，以通过无线网络获取外网(例如因特网)的服务，或者通过无线网络与其它设备通信，如可以与其它终端设备通信。接入网可以是下一代无线接入网络(next generation radio access network，NG-RAN)，接入网可以包括接入网设备，如基站(例如，gNB)，gNB之间通过接口(例如Xn接口)连接。RAN设备用于将终端设备接入到无线网络，gNB和5GC通过接口(例如Ng接口)连接。RAN中可以包括一个或多个接入网设备，比如接入网设备1101、接入网设备1102。
接入网设备为将终端设备接入到无线网络的节点或设备，接入网设备又可以称为基站。接入网设备例如包括但不限于：5G通信系统中的新一代基站(generation Node B，gNB)、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((home evolved nodeB，HeNB)或(home node B，HNB))、基带单元(baseBand unit，BBU)、传输接收点(transmitting and receiving point，TRP)、发射点(transmitting point，TP)、或移动交换中心等。
核心网中(core network，CN)可以包括多个核心网设备，核心网设备用于对终端设备进行管理并提供与外网通信的网关。CN中可以包括一个或多个核心网网元，比如核心网网元120。当图1所示的网络架构适用于5G通信系统时，核心网可以是5G核心网(5G core network，5GC)。5GC包括一个或多个功能或设备，例如，核心网设备可以为接入和移动性管理功能(access and mobility management function，AMF)实体、会话管理功能(session management function，SMF)实体或用户面功能(user plane function，UPF)实体等，会话管理功能(session management function，SMF)。这些功能或设备既可以是硬件设备中的网络元件，也可以是在专用硬件上运行软件功能，或者是平台(例如，云平台)上实例化的虚拟化功能。可以理解的是，各种核心网设备的名称是5G通信系统中的称呼，随着通信系统的演进，可以更换为具有相同功能的其它名称。当图1所示的网络架构适用于LTE通信系统时，核心网设备可以为移动性管理实体(mobility management entity，MME)和服务网关(serving gateway，S-GW)等。
其中，终端设备又可以称为终端设备、用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端设备(mobile terminal，MT)等，是一种向用户提供语音或数据连通性的设备，也可以是物联网设备。例如，终端设备包括具有无线连接功能的手持式设备、车载设备等。目前，终端设备可以是：手机(mobile phone)、平板电脑、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备(例如智能手表、智能手环、计步器等)，车载设备(例如，汽车、自行车、电动车、飞机、船舶、火车、高铁等)、虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、工业控制(industrial control)中的无线终端设备、智能家居设备(例如，冰箱、电视、空调、电表等)、智能机器人、车间设备、无人驾驶(self driving)中的无线终端设备、远程手术(remote medical surgery)中的无线终端设备、智能电网(smart grid)中的无线终端设备、运输安全(transportation safety)中的无线终端设备、智慧城市(smart city)中的无线终端设备，或智慧家庭(smart home)中的无线终端设备、飞行设备(例如，智能机器人、热气球、无人机、飞机)等。本申请实施例中以UE或者终端设备来描述方案。
应理解，图1所示的通信系统中各个设备的数量仅作为示意，本申请实施例并不限于此，实际应用中在通信系统中还可以包括更多的终端设备、更多的RAN设备，还可以包 括其它设备。本申请实施例中，用于实现接入网设备的功能的装置可以是接入网设备，也可以是能够支持接入网设备实现该功能的装置，例如芯片系统或可实现接入网设备功能的组合器件、部件，该装置可以被安装在接入网设备中。在本申请实施例提供的技术方案中，以用于实现接入网设备的功能的装置是接入网设备为例，描述本申请实施例提供的技术方案。
图2为本申请实施例适用的5G通信系统下的一种网络架构示意图。如图2所示，该网络架构包括CN设备(例如，如图2所示的5GC)、RAN设备。
在5G NR网络的一种新的网络架构中，网络设备可以由CU和DU两个逻辑网元构成。其中，网络设备的部分功能部署在一个CU，剩余功能部署在DU，多个DU可以共用一个CU，以节省成本，易于网络扩展。根据场景和需求可以合一部署、也可以分开部署。下述简称该种网络架构为CU-DU分离架构。
本申请实施例中，CU和DU之间通过接口(例如，F1接口)连接。CU代表基站通过接口(例如，Ng接口)和核心网连接。在本申请的通信系统中，结合图2所示，UE可以与接入网设备(例如，gNB)连接，具体的，UE可以与gNB中的DU连接。CU分别与5GC和DU相连。在下行通信链路中，CU用于从5GC接收数据，并将数据发送给DU。在上行通信链路中，CU用于从DU接收数据，并发送给5GC。同时，CU具有对DU的集中控制功能。在采用不同的无线接入技术的系统中，具有CU功能的设备可能有不同的名称。为了方便描述，将具有CU功能的设备统称为接入网中心单元。
DU分别与CU和用户设备(UE)相连，在下行通信链路中，DU用于从CU接收数据，并将数据发送给UE，在上行通信链路中，用于从UE接收数据，发送给CU。在采用不同的无线接入技术的系统中，具有DU功能的设备可能有不同的名称。为了方便描述，将具有DU功能的设备统称为接入网分布式单元。
RAN设备和终端设备之间的通信遵循一定的协议层结构，例如，如图3a所示，控制面协议层结构可以包括无线资源控制(radio resource control，RRC)层、分组数据汇聚协议(packet data convergence protocol，PDCP)层、RLC层、媒体接入控制(media access control，MAC)层和物理层等协议层的功能；用户面协议层结构可以包括PDCP层、RLC层、MAC层和物理层等协议层的功能；在一种可能的实现中，PDCP层之上还可以包括服务数据适配协议(service data adaptation protocol，SDAP)层。其中，RRC层的主要功能是UE的高层控制面，与UE的接入控制、维护、释放以及UE的配置等相关，RRC层才能够解析RRC消息；MAC层和物理(physical layer，PHY)层的主要功能是UE的低层调度，与UE的数据组包、数据调度等相关，MAC层才能够解析MAC层的控制信令，PHY层才能够解析PHY层的控制信令。RAN设备可以由一个节点实现RRC、PDCP、RLC和MAC等协议层的功能，或者可以由多个节点实现这些协议层的功能。
对控制面而言，UL方向上，gNB-DU将UE生成的RRC消息封装在F1接口的F1AP消息中发送到gNB-CU；DL方向上，gNB-CU将RRC消息封装在F1AP消息中发送到gNB-DU，gNB-DU从F1AP消息中提取出RRC消息映射到Uu接口对应的SRB上发送给UE。
对用户面而言，UL方向上，gNB-DU将从Uu接口DRB上收到的UE数据包映射到对应的GTP隧道中发送到gNB-CU；DL方向上，gNB-CU将UE数据包映射到对应的GTP隧道中发送到gNB-DU，gNB-DU从GTP隧道中提取出UE数据包，并将该UE数据包映 射到Uu接口对应的DRB上发送给UE。
在以上网络架构中，CU产生的信令可以通过DU发送给终端设备，或者终端设备产生的信令可以通过DU发送给CU。DU可以不对该信令进行解析而直接通过协议层封装后透传给终端设备或CU。以下实施例中如果涉及这种信令在DU和终端设备之间的传输，此时，DU对信令的发送或接收包括这种场景。例如，RRC或PDCP层的信令最终会处理为物理层的信令发送给终端设备，或者，由接收到的物理层的信令转变而来。在这种架构下，该RRC或PDCP层的信令，即也可以认为是由DU发送的，或者，由DU和射频装载发送的。
网络设备的CU和网络设备的DU之间按照协议栈切分可以如图3b所示。例如，RRC层、SDAP层以及PDCP层部署在网络设备的CU；RLC层、MAC层以及物理层部署在网络设备的DU。
本申请实施例中，当网络设备为支持NR系统的设备时，CU和DU的功能切分可以按照协议栈进行切分。网络设备的CU和网络设备的DU作为两个功能实体，其中一种可能的方式，功能的切分以处理内容的实时性进行区分。如图3b所示，将RRC层、SDAP层和PDCP层部署在CU。RLC层、MAC层和PHY层等部署在DU。相应地，CU具有RRC、PDCP和SDAP的处理能力。对于CU-DU架构的网络设备，由网络设备的CU负责管理终端设备的RRC状态。DU具有RLC、MAC和PHY的处理能力。
值得注意的是，上述功能切分只是一个例子，还可能有其他切分的方式，例如CU包括RRC、PDCP、RLC和SDAP的处理能力，DU具有MAC和PHY的处理能力。又例如CU包括RRC、PDCP、RLC、SDAP和部分MAC(例如加MAC包头)的处理能力，DU具有PHY和部分MAC(例如调度)的处理能力。
这种协议层的划分仅仅是一种举例，还可以在其它协议层划分，例如在RLC层划分，将RLC层及以上协议层的功能设置在CU，RLC层以下协议层的功能设置在DU；或者，在某个协议层中划分，例如将RLC层的部分功能和RLC层以上的协议层的功能设置在CU，将RLC层的剩余功能和RLC层以下的协议层的功能设置在DU。此外，也可以按其它方式划分，例如按时延划分，将处理时间需要满足时延要求的功能设置在DU，不需要满足该时延要求的功能设置在CU。上面描述的协议层的划分仅仅是一种举例，还可以在其它协议层划分，在此不再逐一举例说明。
当然，本申请实施例还可以适用于LTE通信系统。例如，在LTE通信系统中也可以包括RAN设备和CN设备。其中，RAN设备(eNB)包括基带装置和射频装置，其中基带装置可以由一个节点实现，也可以由多个节点实现，射频装置可以从基带装置拉远独立实现，也可以集成在基带装置中，或者部分拉远部分集成在基带装置中。其中射频装置可以相对于基带装置拉远布置，例如射频拉远单元(remote radio unit，RRU)相对于BBU拉远布置。此外，射频装置可以拉远，不放在DU中，也可以集成在DU中，或者部分拉远部分集成在DU中，在此不作任何限制。
应理解，图2和图3b所示的通信系统中所包含的UE的数量和类型仅仅是一种示例，本申请实施例也并不限制于此。比如，还可以包括更多与接入网设备(如gNB)进行通信的UE，为简明描述，不在附图中一一描述。此外，在如图2所示的通信系统中，尽管示出了一个基站、以及分别与每个DU连接的一个UE，但所述通信系统可以并不限于包括该基站、以及分别与每个DU连接的一个UE，在此不再详述。
应理解的是，图1至图3b中仅仅示意了本申请实施例涉及的几个功能或设备，通信系统架构中还可以包括更多或更少的功能或设备。例如，图1中的5GC设备中还可以包括统一数据管理(unified data management，UDM)或数据网络(data network，DN)等，如图2所示的DU还可以被配置更多的逻辑小区等。
进一步的，如图4a所示，相对于图3b所示的架构，网络设备的CU还有可能是控制面(control plane，CP)和用户面(user plane，UP)分离的形态，即CU可分成2个逻辑网元：CU-CP和CU-UP。目前，LTE系统中，CU-DU之间的接口命名为W1接口，NR系统中CU-DU之间的接口命名为F1接口，这2个接口的功能类似。图4a中以网络设备为NR系统中的gNB为例来说明。F1接口上包含控制面(CP)和用户面(UP)。控制面的传输层协议为流控传输协议(stream control transport protocol，SCTP)，传输的消息为F1应用层协议(F1 application protocol，F1AP)消息。用户面的传输层协议为通用分组无线服务(General Packet Radio Service，GPRS)隧道协议用户面(GPRS Tunnelling Protocol User Plane，GTP-U)。
CU-CP和CU-UP之间的接口命名为E1，用于传输CU-CP和CU-UP间的信令。CU-CP和DU间的F1-C接口用于传输CU-CP和DU间的F1信令、终端设备的RRC信令。CU-CP和DU间的F1-U接口用于传输数据无线承载(data radio bearer，DRB)的数据。DU空口接收DRB上承载的上行数据后，经过DU的物理层、MAC层、RLC层处理，通过F1-U接口将DRB数据发送给CU。DU空口接收到终端设备发送的RRC消息后，经过DU的物理层、MAC层、RLC层处理，通过F1-CP接口，将RRC消息发送给CU。
示例性地，CU的功能可以由一个实体来实现，或者也可以由不同的实体来实现。例如，如图2所示，可以对CU的功能进行进一步切分，即将控制面和用户面分离并通过不同实体来实现，分别为控制面CU实体(即CU-CP实体)和用户面CU实体(即CU-UP实体)，CU-CP实体和CU-UP实体可以与DU相耦合，共同完成接入网设备的功能。CU-CP实体与CU-UP实体之间的接口可以为E1接口，CU-CP实体与DU之间的接口可以为F1-C接口，CU-UP实体与DU之间的接口可以为F1-U接口。其中，一个DU和一个CU-UP可以连接到一个CU-CP。在同一个CU-CP控制下，一个DU可以连接到多个CU-UP，一个CU-UP可以连接到多个DU。
需要说明的是，本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
如前所述，当网络设备为CU-DU架构时，CU具有RRC层，负责管理终端设备的RRC状态。在5G网络中，可以包括三个RRC状态：RRC空闲态(idle)，RRC非激活态(Inactive)，RRC连接态(connected)。
在RRC连接态下，终端设备与接入网设备之间有专用的RRC连接。这个专用的RRC连接是DRB或SRB1的连接。在RRC空闲态下，终端设备与接入网设备没有专用的RRC连接。
RRC非激活态是5G新增的一种RRC状态，处于RRC非激活态的UE可以有较低的数传恢复时延，原因是RRC非激活态的UE可以通过RRC Resume流程快速迁移到RRC连接态，而无需重新接入。终端设备保存自己的上下文，源网络设备(Last serving gNB) 保存终端设备的上下文，以及与AMF和UPF的NG连接。终端设备与接入网设备的专用的RRC连接是挂起的，后续可以恢复的。在RRC非激活态下，终端设备在RNA下移动，可以不会知会接入网设备。UE在同一个RNA中移动时，则不需要与gNodeB交互信息。UE移出RNA范围时，则需要启动RNA更新过程。
另外，在RRC非激活态的UE会暂停数据处理，RRC非激活态可以获得与RRC空闲态相近的功耗水平，从而，节省终端设备的能耗。RRC非激活态和RRC空闲态类似，都只能接收公共搜索空间的内容(Paging、广播)，可以进行小区重选，且关于小区重选的原理与RRC空闲态相同。
在RRC非激活下，终端设备可以通过请求恢复RRC连接，从RRC非激活态变为RRC连接态。可以参考图4b所示。参见图4b，为本申请实施例提供的一种恢复RRC连接的方法流程示意图，该方法流程包括：
步骤401：终端设备向目标基站发送RRC恢复请求(RRC resume request)。
其中，终端设备可以在移动出源基站的覆盖范围，进入目标基站gNB的覆盖范围后，向目标基站并发起RRC恢复流程。该RRC恢复请求中可以携带I-RNTI，以便目标基站可以向源基站请求终端设备的上下文。
步骤402：目标基站向源基站发送终端设备上下文索取请求(retrieve UE context request)。
其中，该终端设备上下文索取请求中包括终端发送的RRC恢复请求中的I-RNTI。源基站根据该I-RNTI和保存的终端设备的上下文，可以确定终端设备的上下文。
步骤403：源基站向目标基站发送终端设备上下文索取响应(retrieve UE context response)。
其中，该终端设备上下文索取响应可以包括终端设备的上下文。
步骤404：目标基站向终端设备发送RRC恢复消息(RRC resume)。
相应的，终端设备在接收到该RRC恢复消息后，进入RRC连接态，实现RRC连接的恢复。
步骤405：终端设备向目标基站发送RRC连接恢复完成消息(RRC Resume complete)。
步骤406：目标基站向源基站发送数据转发地址指示信息(Xn-U address indication)。
其中，该数据转发地址指示信息，可以用于通知源基站的数据转发的隧道地址，例如，该数据转发地址可以是用于转发下行数据的隧道地址，此时源基站可以有终端设备的下行数据，那么就可以把下行数据发送给目标基站，之后目标基站再发送给终端设备。
步骤407：源基站向核心网发送路径切换请求(path switch request)。
其中，该路径切换请求可以用于切换核心网与基站之间的数据转发路径。例如，把UPF与源基站的连接，切换到UPF与目标基站的连接，之后的下行数据可以通过UPF直接发给目标基站。
步骤408：核心网设备向源基站发送路径切换响应(path switch response)。
步骤409：核心网设备向源基站发送上下文释放消息(context release)，以通知源基站释放终端设备的上下文。
相比RRC空闲态到RRC连接态的转换的信令流程，即UE初始接入的过程，包含了随机接入过程、RRC连接建立过程、初始上下文建立过程。而RRC非激活态到RRC连接态的信令流程，可以节省大量的信令交互(例如Uu口上减少了RRC重配置过程、安全 模式配置过程，NG口上减少了上下文建立过程、鉴权流程等)。这些信令交互的节省就使RRC非激活态相对RRC空闲态获得了更快的接入时延。
下面具体介绍终端设备的上下文建立的流程，具体可以参考图5所示。
步骤501：终端设备向网络设备的CU发送能力信息。
所述能力信息用于指示终端设备的能力。进一步，可选的，所述能力信息用于指示终端设备具有非激活态数据传输的能力，该能力表示终端设备处于非激活态时，具有在配置授权或调度授权中传输上行信息的能力。其中，上行信息包括但不限于上行信令以及上行数据。上行信令可以为上行RRC信令等，上行数据可以为上行业务数据，例如视频数据、音频数据等。
需要说明的是，调度授权是指由终端设备发送资源请求，网络设备根据资源请求为终端设备分配的资源，例如资源请求可以为随机接入过程中的前导码(preamble)，还可以为上行调度请求等。配置授权，是指网络设备预先配置的资源，无需终端设备发送资源请求，具有一次分配多次使用的特点。
需要说明的是，终端设备的能力有多种，能力信息还可以指示终端设备的其它能力，本申请实施例对此并不限定。
步骤502：网络设备的CU向网络设备的DU发送UE上下文建立请求消息。
所述UE上下文建立请求消息可以用于请求为终端设备建立上下文(context)。
可选的，UE上下文建立请求消息中可以包括所述能力信息。
步骤503：网络设备的DU为终端设备建立上下文，并向网络设备的CU发送UE上下文建立响应消息。
需要说明的是，本申请实施例中，上下文可以包括空口上下文和F1上下文。
其中，空口上下文可以是指终端设备的RLC层配置、MAC层配置、物理层的配置信息、I-RNTI、C-RNTI等。其中，还可包括“非激活态的数据传输的配置授权”、用于发送物理层反馈信息的PDCCH配置信息、用于加扰PDCCH的RNTI。F1上下文可以是指F1AP ID、F1数据传输的传输层地址信息等。网络设备的CU与网络设备的DU之间传输终端设备的DRB数据，也可以称为F1数据传输。
本申请实施例中，网络设备的DU为终端设备建立的上下文可以包括以下一项或多项：
1、为所述终端设备配置的配置授权(configured grant)；配置授权可以用于指示为终端设备分配的上行资源，其中，配置授权可以包括但不限于物理上行共享信道(physical uplink shared channel，PUSCH频域资源、周期、起始位置、数据解调参考信息中的一个或多个。
可选的，所述配置授权可以是为非激活态的终端设备配置的，非激活态的终端设备可以使用所述配置授权发送上行RRC信令、上行数据中的一项或多项。
可选的，所述配置授权配置的时频资源可以是终端设备专用的时频资源，即不和其他终端设备共享的时频资源。在该情况下，网络设备的DU可以建立配置授权分别与终端设备的上下文和终端设备的数据传输通道的映射关系。
可选的，所述配置授权配置的时频资源可以是终端设备与其他终端设备共享的时频资源。在该情况下，当网络设备的CU确定终端设备进入非激活态时，可以向网络设备的DU发送非激活态I-RNTI。网络设备的DU可以建立配置授权与终端设备的I-RNTI的映射关系。I-RNTI可以是非激活态的终端设备在一个无线网络通知区域(RAN-based notification  area，RNA)内的唯一标识。
2、为所述终端设备配置的PDCCU的配置信息；PDCCH的配置信息可以用于发送上行数据的反馈信息或调度PUSCH传输、调度物理下行共享控制信道(physical downlink control channel，PDSCH)传输等。
其中，PDCCH的配置信息包括但不限于PDCCH的资源位置信息、周期、起始位置等。
本申请实施例中，PDCCH可能调度物理层信令的发送，比如确认(acknowledgement，ACK)或非确认(negative acknowledgement，NACK)信令、用于初传的上行授权、用于重传的上行授权中的至少一个。PDCCH还可能调度PDSCH的发送，PDSCH中承载的信息包括但不限于下行RRC信令、下行数据、定时提前量命令中的一个或多个。终端设备可以根据PDCCH的调度进行上行传输以及下行传输。
3、用于加扰所述PDCCH的临时标识；所述临时标识为用于加扰PDCCH的32比特的无线网络临时标识(radio network temporary identity，RNTI)。例如，所述临时标识可以为终端设备的小区无线网络临时标识(cell radio network temporary identity，C-RNTI)。
4、为所述终端设备配置的无线承载的RLC层的配置信息。
5、为所述终端设备配置的MAC层的配置信息。
6、为所述终端设备配置的I-RNTI。
需要说明的是，以上只是示例，终端设备的上下文还可以包括其他信息，本申请实施例并不限定，在此不再逐一举例说明。
示例性的，网络设备的CU发送的UE上下文建立响应消息中可以包括所述终端设备的上下文。
图5所示的流程中，只描述了主要步骤，在为终端设备建立上下文的过程中还可能存在其他步骤，在此不再赘述。
通过图5所示的流程，建立了终端设备的上下文。
在RRC非激活态下进行小数据传输，而不需要进入RRC连接态。可以避免考虑到UE在进行数据传输时，必须要进入RRC连接态，而一种特殊的场景下，例如，在UE进行小数据传输时，数据传输量不大，但是可能需要多次、不连续的发送数据，导致UE需要频繁切换RRC非激活态和RRC连接态，也导致信令的频繁发送，因此，一种可能的实现方式为，考虑在RRC非激活态下进行小数据传输，终端设备不需要进入RRC连接态。以节省信令的开销。终端在基于RRC非激活态下，进行小数据传输，可以通过RA-SDT的方式进行。考虑到在如图1所示的CU-DU分离的场景下，由于基站分为了CU和DU两个部分，当终端在移动出源基站的覆盖范围，进入目标基站的覆盖范围后，在RRC非激活态下，需要考虑网络设备的DU如何确定是否保留终端设备的上下文。
如图6所示，本申请实施例提供一种通信方法，包括以下步骤：
步骤601：第一网络设备的CU向第一网络设备的DU发送RRC释放消息(RRC Release)。
其中，第一网络设备可以是终端设备在RRC连接态时接入的源网络设备。第一网络设备的CU确定终端设备从RRC连接态切换到RRC非激活态时，向第一网络设备的DU发送的RRC释放消息。该RRC Release消息中携带挂起(suspend)配置，该配置用于指示终端设备切换到RRC非激活态。可选地，第一网络设备的CU向第一网络设备的DU发送保存第一网络设备的DU上下文的指示信息。
步骤602：第一网络设备的DU在接收到该RRC释放消息后，保存该终端设备的上下文。
例如，该上下文可以是第一网络设备的在接收到保存DU上下文的指示信息后保存的，还可以是第一网络设备的DU默认保存上下文)，具体可以参考图5中建立DU上下文的方式。举例来说，该第一网络设备的DU上下文可以包括以下至少一项：
1.小数据传输配置授权SDT-CG配置，该小数据配置授权CG配置可以包括以下至少一项：CG时域资源的指示信息，CG频域资源的指示信息等。
2.小数据传输SDT-时间同步(time alignment，TA)配置：小数据传输的时间同步计时器SDT-(TA timer，TAT)。
3.SDT-RLC配置，该配置可以包括以下至少一项：SDT-RLC的模式(AM or UM)的指示信息，RLC的序列号(sequence number，SN)长度的指示信息等。
步骤603：第一网络设备的DU向终端设备发送RRC连接释放(RRC Release)消息。
步骤604：终端设备从RRC连接态切换到RRC非激活态。
步骤605：在终端设备有数据传输时，触发小数据传输过程。具体的小数据传输过程可以参考现有技术中的传输方式，在此不再赘述。
步骤606：终端设备向第二网络设备发送RRC恢复请求消息(RRC resume request)和上行数据(user data)。其中，上行数据可以通过NAS信息(NAS message)携带。
以第一网络设备为源网络设备，第二网络设备为目标网络设备为例。在一些场景中，终端设备可以在移动出源网络设备的DU的覆盖范围，进入目标网络设备的DU的覆盖范围后，向目标网络设备的DU发起RRC恢复流程。此时，需要将源网络设备的DU切换至目标网络设备的DU。该RRC恢复请求中可以携带I-RNTI，以便目标网络设备的CU可以向源网络设备的CU请求终端设备的上下文。
在另一些场景中，终端设备可以在移动出源网络设备的CU的覆盖范围，进入目标网络设备的CU和目标网络设备的DU的覆盖范围后，向目标网络设备的CU或目标网络设备的DU发起RRC恢复流程。此时，需要将源网络设备的CU切换至目标网络设备的CU，且将源网络设备的DU切换至目标网络设备的DU。该RRC恢复请求中可以携带I-RNTI，以便目标网络设备的CU可以向源网络设备的CU请求终端设备的上下文。从而，目标网络设备的DU可以通过目标网络设备的CU获得终端的上下文。
步骤607：第二网络设备向第一网络设备的CU发送UE上下文索取请求(Retrieve UE context request)。
在一种可能的实现方式中，该UE上下文索取请求中可以包括终端设备的身份校验信息，第一网络设备的CU结合自己本身存在的安全上下文以及UE上下文索取请求中的校验信息，进行身份校验。
步骤608：第一网络设备的CU向目标网络设备发送UE上下文索取响应(Retrieve UE context response)。
在一些实施例中，可以是第一网络设备的CU在身份校验成功之后，第一网络设备的CU向目标网络设备发送UE上下文索取响应。
在一种可能的实现方式中，以锚点重定位(Anchor relocation)方式为例，该UE上下文索取响应中可以包括所有的上下文，例如，该UE上下文索取响应中可以包括：SDAP配置，RLC配置，PDCP配置，RB配置等。
在一种可能的实现方式中，以非锚点重定位(No Anchor relocation)方式为例，该UE上下文索取响应中可以包括终端设备的部分上下文。例如，该UE上下文索取响应中可以包括：RLC配置。
步骤609：第一网络设备的CU向第一网络设备的DU发送第一消息。
其中，第一消息用于指示所述第一网络设备的DU释放所述终端设备的上下文。
在一些实施例中，可以是第一网络设备的CU在身份校验成功之后，向第一网络设备的DU发送释放指示信息。当然，还可以是在第一网络设备的CU确定目标网络设备的DU与终端设备之间的RRC连接建立完成后，向第一网络设备的DU发送释放指示信息。
步骤6010：第一网络设备的DU释放终端设备的DU上下文。
其中，第一网络设备的DU可以在接收到所述指示信息之后，释放终端设备的DU上下文。
通过上述方法，源网络设备的CU在确定终端设备在新的基站发起resume过程后，可以确定终端设备不会回到源网络设备的DU的覆盖范围，因此，源网络设备的CU可以向源网络设备的DU发送释放上下文的指示信息，有利于DU可以把资源分配给其他终端，提高DU资源的利用率。
结合图1的网络架构，在RRC非激活态的小数据传输场景下，本申请实施例还提供一种通信方法，如图7所示，包括以下步骤：
步骤701：终端设备向第一网络设备发送配置授权请求。
其中，该配置授权请求可以用于请求第一网络设备配置该终端设备的配置授权的小数据传输资源，例如，可以用于请求TBS配置，周期配置资源，该资源可以在终端设备建立RRC连接态时向第一网络设备发送。
需要说明的是，步骤701是可选的，第一网络设备还可以通过其他方式为终端配置CG-SDT资源。
步骤702：终端设备确定至少一个SSB。
在一些实施例中，终端设备可以确定至少一个SSB。
举例来说，终端设备可以确定SSB1，该SSB1与CG-SDT资源关联。终端设备还可以确定SSB2，其中，SSB2与CG-SDT资源没有关联关系。
从而，在第一网络设备为终端设备配置CG-SDT资源后，终端可以基于确定的与CG-SDT资源关联的SSB，确定是否可以使用该CG-SDT资源进行小数据传输。从而，避免了终端设备需要单独为终端设备指示终端设备何时可以使用CG-SDT资源进行小数据传输的CG-SDT资源。
步骤703：第一网络设备向终端设备发送上行同步指示信息。
相应的，终端设备根据该上行同步指示信息，调整上行同步。
步骤704：第一网络设备的CU通过第一网络设备的DU向终端设备发送第一指示信息。
其中，第一指示信息用于指示所述终端设备的配置授权的第一资源，所述第一资源与第一SSB关联；所述第一SSB用于所述终端设备在所述非激活态下，确定是否使用所述第一资源发送数据。在一些实施例中，第一指示信息可以通过RRC释放消息携带第一指示信息。相应的，终端设备在接收到该第一指示信息之后，可以确定用于传输小数据的配 置授权资源为第一资源。
在获得第一指示信息后，终端设备可以进入RRC非激活态，以节省功耗。
步骤705：终端根据第一资源及SSB与CG-SDT资源的关联关系，确定所述第一SSB为所述第一资源的参考SSB。
其中，第一资源的参考SSB用于确定所述第一资源的上行同步是否有效。例如，在确定所述第一资源的上行同步有效时，确定使用所述第一资源发送数据；在确定所述第一资源的上行同步失效时，确定释放所述第一资源。
在一些实施例中，在所述第一SSB的RSRP大于或等于第一阈值时，确定所述第一资源的上行同步有效；
例如，当第一SSB的RSRP大于或等于第一阈值，那么确定第一SSB作为第一资源的参考SSB。需要说明的是，即使SSB2的RSRP大于或等于第一阈值，考虑到SSB2不是与第一资源关联的SSB，因此，SSB2不能作为第一资源的参考SSB。
步骤706：终端设备根据参考SSB，确定第一资源的上行同步是否有效。若是，则执行步骤707，若否，则执行步骤708。
在一些实施例中，终端设备可以在所述第一SSB的RSRP的增加变化量大于或等于第二阈值时，或者，在所述第一SSB的RSRP的减少变化量大于或等于第三阈值时，确定所述第一资源的上行同步失效。举例来说，第二阈值或第三阈值是由网络设备配置的，在RRC释放消息中发送给终端设备的。
步骤707：终端设备不使用第一资源向第一网络设备传输(或发送)数据。
可选地，终端设备确定TA失效后，可以释放第一资源。
步骤708：终端设备进行小数据传输过程，具体的，终端设备使用第一资源向第一网络设备传输(或发送)数据。
举例来说，终端设备使用第一资源向第一网络设备发送的数据可以为用户数据，还可以是业务数据等，在此不做限定。
步骤709：在终端设备确定切换至第二网络设备时，终端设备向第二网设备发送RRC恢复请求消息(resume request)。
步骤7010：第二网络设备向终端设备发送RRC恢复消息。
可选的，所述RRC恢复消息中包括第二指示信息，第二指示信息用于指示终端设备的配置授权的第二资源，所述第二资源用于所述终端设备在所述非激活态和连接态下，使用所述第二资源发送数据。即第二资源可以用于终端设备的RRC连接态。
相应的，终端设备接收网络设备发送RRC恢复消息，在一些实施例中，第二资源可以与第一资源相同。此时，当终端设备接收到RRC恢复消息后，进入RRC连接态，并使用第二资源向第二网络设备发送第二数据。或者，第二资源可以与第一资源不同，此时，终端设备可以基于确定第一资源的上行同步是否有效的方式确定第二资源的上行同步是否有效，在确定第二资源的上行同步有效时，可以使用第二资源向第二网络设备发送数据。
可选的，步骤7011：第一网络设备的CU向第一网络设备的DU发送第一消息。
第一网络设备的CU向第一网络设备的DU发送第一消息之前，还可以执行步骤607和步骤608，在此不再赘述。
步骤7012：第一网络设备的DU释放终端设备的DU上下文。
结合图1的网络架构和图6的实现方式，在终端设备进行切换至第二网络设备后，进入RRC连接态，终端设备可以重新进入RRC非激活态，在终端设备从RRC连接态切换至RRC非激活态的小数据传输场景下，本申请实施例还提供一种通信方法，如图8所示，包括以下步骤：
步骤801：终端设备向第二网络设备发送配置授权请求。
其中，该配置授权请求可以用于请求第二网络设备确定配置授权的小数据传输资源，该资源可以用于终端设备在RRC连接态上传输小数据。
在一些实施例中，终端设备向第二网络设备发送配置授权请求还可以用于请求第二网络设备确定第二资源，所述第二资源用于所述终端设备在所述非激活态和连接态下，使用所述第二资源发送数据。可选的，所述第二资源与第二SSB关联；所述第二SSB用于所述终端设备在非激活态和RRC连接态下，确定是否使用所述第二资源发送数据。
在另一些实施例中，终端设备还可以提前请求在RRC非激活态下的配置授权的小数据传输资源。具体参见上文中终端设备获得第一资源的方式，在此不再赘述。
需要说明的是，第一资源可以与第二资源相同，也可以不同，在此不做限定。另外，步骤801是可选的，第二网络设备还可以通过其他方式为终端配置CG-SDT资源。
步骤802：终端设备确定至少一个SSB。
在一些实施例中，终端设备可以确定至少一个SSB。
举例来说，终端设备可以确定SSB1，SSB3，该SSB1与第一资源关联，SSB3与第二资源关联。终端设备还可以确定SSB2，其中，SSB2与CG-SDT资源没有关联关系。
从而，在第一网络设备为终端设备配置CG-SDT资源后，终端可以基于确定的与CG-SDT资源关联的SSB，确定是否可以使用该CG-SDT资源进行小数据传输。从而，避免了终端设备需要单独为终端设备指示终端设备何时可以使用CG-SDT资源进行小数据传输的CG-SDT资源。
步骤803：第二网络设备向终端设备发送上行同步指示信息。
相应的，终端设备根据该上行同步指示信息，调整TA。
步骤804：第二网络设备的CU通过第二网络设备的DU向终端设备发送第一指示信息。
其中，第一指示信息用于指示所述终端设备的配置授权的第一资源，所述第一资源与第一SSB关联；所述第一SSB用于所述终端设备在所述非激活态下，确定是否使用所述第一资源发送数据。相应的，终端设备在接收到该第一指示信息之后，可以确定用于传输小数据的配置授权资源为第一资源。
可选的，第二网络设备的CU通过第二网络设备的DU向终端设备发送第二指示信息。
其中，所述第二指示信息用于指示所述终端设备的配置授权的第二资源。所述第二资源与第二SSB关联；所述第二SSB用于所述终端设备在所述连接态下，确定是否使用所述第二资源发送数据。或者，所述第二SSB用于所述终端设备在所述连接态和非激活态下，确定是否使用所述第二资源发送数据。
步骤805：终端设备根据第二资源及SSB与CG-SDT资源的关联关系，确定第二SSB为所述第二资源的参考SSB。
其中，第二资源的参考SSB用于确定所述第二资源的上行同步是否有效。例如，在确定所述第二资源的上行同步有效时，确定使用所述第二资源发送数据；在确定所述第二资 源的上行同步失效时，确定释放所述第二资源。
在一些实施例中，在所述第二SSB的RSRP大于或等于第一阈值时，确定所述第二资源的上行同步有效；
例如，当第二SSB的RSRP大于或等于第一阈值，那么确定第二SSB作为第二资源的参考SSB。需要说明的是，即使SSB2的RSRP大于或等于第一阈值，考虑到SSB2不是与第二资源关联的SSB，因此，SSB2不能作为第二资源的参考SSB。
可选的，终端设备可以根据第一资源及SSB与CG-SDT资源的关联关系，确定第一SSB为所述第一资源的参考SSB。
其中，第一资源的参考SSB用于确定所述第一资源的上行同步是否有效。例如，在确定所述第一资源的上行同步有效时，确定使用所述第一资源发送数据；在确定所述第一资源的上行同步失效时，确定释放所述第一资源。
在一些实施例中，在所述第一SSB的RSRP大于或等于第一阈值时，确定所述第一资源的上行同步有效；
例如，当第一SSB的RSRP大于或等于第一阈值，那么确定第一SSB作为参考SSB。需要说明的是，即使第二SSB的RSRP大于或等于第一阈值，考虑到第二SSB不是与第一资源关联的SSB，因此，第二SSB不能作为第一资源的参考SSB。
步骤806：终端设备根据第二资源的参考SSB，确定第二资源的上行同步是否有效。若是，则执行步骤808，若否，则执行步骤807。
在一些实施例中，终端设备可以在所述第二SSB的RSRP的增加变化量大于或等于第二阈值时，或者，在所述第二SSB的RSRP的减少变化量大于或等于第三阈值时，确定所述第二资源的上行同步失效。举例来说，第二阈值或第三阈值是由网络设备配置的，在RRC释放消息中发送给终端设备的。
步骤807：终端设备不使用第二资源向第二网络设备发送数据。
可选地，终端设备确定TA失效，终端设备可以释放第二资源。
步骤808：终端设备进行小数据传输过程，具体的，终端设备使用第二资源向第二网络设备发送用户数据。
步骤809：终端设备在确定进入RRC非激活态后，根据第一资源的参考SSB，确定第一资源的上行同步是否有效。若是，则执行步骤8011，若否，则执行步骤8010。
终端设备在确定进入RRC非激活态的方式可以参考步骤401～步骤404，在此不再赘述。
在一些实施例中，终端设备可以在所述第一SSB的RSRP的增加变化量大于或等于第二阈值时，或者，在所述第一SSB的RSRP的减少变化量大于或等于第三阈值时，确定所述第一资源的上行同步失效。举例来说，第二阈值或第三阈值是由网络设备配置的，在RRC释放消息中发送给终端设备的。
步骤8010：终端设备不使用第一资源向第二网络设备发送数据。
可选地，终端设备确定TA失效，终端设备可以释放第二资源。
步骤8011：终端设备进行小数据传输过程，具体的，终端设备使用第一资源向第二网络设备发送用户数据。
通过确定TA有效的条件，在有配置授权资源关联的SSB，作为参考SSB，使得终端设备获知TA是否有效，以便判断是否能够使用网络设备指示的配置授权资源。另外，在 发起配置授权的小数据传输过程中，终端发起的配置授权请求还可以用于请求配置用于RRC连接态的CG-SDT资源，使得终端设备在所述非激活态下，及终端设备切换为RRC连接态后，还可以继续使用该配置的CG-SDT资源，因此，可以使得切换后无需再次配置CG-SDT资源，更加的高效进行小数据传输，无论是在切换过程中，还是切换后，都可以顺畅的传输小数据。
参考图9，为本申请实施例提供的一种通信装置的示意图。该装置用于实现上述方法实施例中对应的第一网络设备所执行的各个步骤，如图9所示，该装置900包括集中式单元901和分布式单元902，其中，集中式单元901可以包括处理模块9010。可选的，集中式单元901还包括发送模块9020和接收模块9030。
在一些实施例中，处理模块9010，用于通过发送模块9020经所述第一网络设备的分布式单元902向终端设备发送第一指示信息；所述第一指示信息用于指示所述终端设备配置授权的第一资源，所述第一资源与第一SSB关联；所述第一SSB用于所述终端设备在非激活态下，确定是否使用所述第一资源发送数据。
一种可能的实现方式，处理模块9010，用于通过发送模块9020向第二网络设备发送处于非激活态的终端设备的上下文；处理模块9010，用于通过发送模块9020通过向所述第一网络设备的分布式单元902发送第一消息，所述第一消息用于指示所述第一网络设备的分布式单元902释放所述终端设备的上下文。
一种可能的实现方式，处理模块9010，用于通过发送模块9020向第二网络设备发送处于非激活态的终端设备的上下文之前，还包括：处理模块9010，用于通过接收模块9030接收来自所述第二网络设备的所述终端设备的上下文索取请求。
一种可能的实现方式，处理模块9010，用于通过发送模块9020向第二网络设备发送处于非激活态的终端设备的上下文之前，还包括：处理模块9010，用于对所述第二网络设备进行身份校验成功。
一种可能的实现方式，处理模块9010，用于通过发送模块9020经所述第一网络设备的分布式单元向所述终端设备发送第二指示信息；所述第二指示信息用于指示所述终端设备的配置授权的第二资源，所述第二资源用于所述终端设备在所述非激活态和连接态下，使用所述第二资源发送数据。
在另一些实施例中，集中式单元的处理模块9010，用于通过集中式单元的发送模块9020向第二网络设备发送处于非激活态的终端设备的上下文；集中式单元的处理模块9010，用于通过集中式单元的发送模块9020向所述第一网络设备的分布式单元发送第一消息，所述第一消息用于指示所述第一网络设备的分布式单元902释放所述终端设备的上下文。
一种可能的实现方式，集中式单元的处理模块9010，用于通过集中式单元的发送模块9020向第二网络设备发送处于非激活态的终端设备的上下文之前，还用于通过集中式单元的接收模块9030接收来自所述第二网络设备的所述终端设备的上下文索取请求。
一种可能的实现方式，集中式单元的处理模块9010，用于通过集中式单元的发送模块9020向第二网络设备发送处于非激活态的终端设备的上下文之前，还用于对所述第二网络设备进行身份校验成功。
一种可能的实现方式，所述上下文包括以下一项或多项：为所述终端设备配置的配置授权；为所述终端设备配置的物理下行控制信道的配置信息；用于加扰所述物理下行控制信道的临时标识；为所述终端设备配置的非激活态无线网络临时标识；为所述终端设备配 置的无线承载的无线链路控制层的配置信息。
一种可能的实现方式，所述处于非激活态的终端设备用于与通信装置900传输数据。
参考图10，为本申请实施例提供的一种通信装置的示意图。该装置用于实现上述方法实施例中对应的第二网络设备或终端设备所执行的各个步骤，如图10所示，该装置1000包括处理模块1010。可选的，还包括发送模块1020和接收模块1030。
在一些实施例中，以图10的通信装置为第二网络设备为例，处理模块1010，用于通过发送模块1020向终端设备发送第一指示信息；所述第一指示信息用于指示所述终端设备的配置授权的第一资源，所述第一资源与第一SSB关联；所述第一SSB用于所述终端设备在所述终端设备的非激活态下，确定是否使用所述第一资源发送数据。
结合图9和图10的实施例，一种可能的实现方式，所述第一SSB的RSRP用于确定所述第一资源的上行同步是否失效；在确定所述第一资源的上行同步有效时，确定使用所述第一资源发送数据；在确定所述第一资源的上行同步失效时，确定释放所述第一资源。
结合图9和图10的实施例，一种可能的实现方式，在所述第一SSB的RSRP大于或等于第一阈值时，确定所述第一资源的上行同步有效；在所述第一SSB的RSRP的增加变化量大于或等于第二阈值时，或者，在所述第一SSB的RSRP的减少变化量大于或等于第三阈值时，确定所述第一资源的上行同步失效。
结合图9和图10的实施例，一种可能的实现方式，所述上下文包括以下一项或多项：为所述终端设备配置的配置授权；为所述终端设备配置的PDCCH的配置信息；用于加扰所述PDCCH的临时标识；为所述终端设备配置的非激活态I-RNTI；为所述终端设备配置的无线承载的RLC层的配置信息。
在另一些实施例中，以图10的通信装置为终端设备为例。
一种可能的实现方式，处理模块1010，用于通过接收模块1030经第一网络设备的分布式单元接收所述第一网络设备的集中式单元发送的第一指示信息，所述第一指示信息用于指示所述终端设备配置授权的第一资源，所述第一资源与第一SSB关联；所述处理模块1010，用于在非激活态下，根据所述第一SSB确定是否使用所述第一资源发送数据。
一种可能的实现方式，处理模块1010，用于通过接收模块1030接收第二网络设备发送的第一指示信息，所述第一指示信息用于指示所述终端设备配置授权的第一资源，所述第一资源与第一SSB关联；所述终端设备在非激活态下，根据所述第一SSB确定是否使用所述第一资源发送数据。需要说明的是，第二网络设备可以是终端设备从第一网络设备切换后的网络设备。也可以是终端设备从第一网络设备切换前的网络设备。
一种可能的实现方式，处理模块1010，用于在非激活态下，根据所述第一SSB的参考信号功率RSRP，确定所述第一资源的上行同步是否失效；在确定所述第一资源的上行同步有效时，确定使用所述第一资源发送数据；在确定所述第一资源的上行同步失效时，确定不使用所述第一资源发送数据。
一种可能的实现方式，处理模块1010，用于在非激活态下，确定所述第一资源的上行同步失效时，释放所述第一资源。
一种可能的实现方式，处理模块1010，用于在非激活态下，根据所述第一SSB的RSRP，确定所述第一资源的上行同步是否失效，包括：在所述第一SSB的RSRP大于或等于第一阈值时，确定所述第一资源的上行同步有效；在所述第一SSB的RSRP的增加变化量大于或等于第二阈值时，或者，在所述第一SSB的RSRP的减少变化量大于或等于第三阈值时， 确定所述第一资源的上行同步失效。
一种可能的实现方式，处理模块1010，用于通过接收模块1030经第一网络设备的分布式单元接收所述第一网络设备的集中式单元发送的第二指示信息；所述第二指示信息用于指示终端设备的配置授权的第二资源，所述配置授权的第二资源用于终端设备在所述非激活态和连接态下，使用所述第二资源发送数据。
一种可能的实现方式，处理模块1010，用于通过接收模块1030接收所述第二网络设备发送第二指示信息，所述第二指示信息用于指示所述终端设备的配置授权的第二资源，所述第二资源用于终端设备在非激活态和连接态下，使用所述第二资源发送数据。
一种可能的实现方式，处理模块1010，用于通过所述第二网络设备获得的终端设备的上下文恢复至连接态，所述终端设备的上下文为所述第二网络设备通过接收来自第一网络设备的集中式单元获得的。
可选的，上述通信装置900或通信装置1000还可以包括存储单元，该存储单元用于存储数据或者指令(也可以称为代码或者程序)，上述各个单元可以和存储单元交互或者耦合，以实现对应的方法或者功能。例如，处理模块9010或处理模块1010可以读取存储单元中的数据或者指令，使得通信装置实现上述实施例中的方法。
应理解以上装置中单元的划分仅仅是一种逻辑功能的划分，实际实现时可以全部或部分集成到一个物理实体上，也可以物理上分开。且装置中的单元可以全部以软件通过处理元件调用的形式实现；也可以全部以硬件的形式实现；还可以部分单元以软件通过处理元件调用的形式实现，部分单元以硬件的形式实现。例如，各个单元可以为单独设立的处理元件，也可以集成在装置的某一个芯片中实现，此外，也可以以程序的形式存储于存储器中，由装置的某一个处理元件调用并执行该单元的功能。此外这些单元全部或部分可以集成在一起，也可以独立实现。这里所述的处理元件又可以成为处理器，可以是一种具有信号的处理能力的集成电路。在实现过程中，上述方法的各个步骤或以上各个单元可以通过处理器元件中的硬件的集成逻辑电路实现，或者也可以是以软件通过处理元件调用的形式实现。
在一个例子中，以上任一装置中的单元可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个特定集成电路(application specific integrated circuit，ASIC)，或，一个或多个微处理器(digital singnal processor，DSP)，或，一个或者多个现场可编程门阵列(field programmable gate array，FPGA)，或这些集成电路形式中至少两种的组合。再如，当装置中的单元可以通过处理元件调度程序的形式实现时，该处理元件可以是通用处理器，例如中央处理器(central processing unit，CPU)或其它可以调用程序的处理器。再如，这些单元可以集成在一起，以片上系统(system-on-a-chip，SOC)的形式实现。
以上用于接收的单元(例如接收单元)是一种该装置的接口电路，用于从其它装置接收信号。例如，当该装置以芯片的方式实现时，该接收单元是该芯片用于从其它芯片或装置接收信号的接口电路。以上用于发送的单元(例如发送单元)是一种该装置的接口电路，用于向其它装置发送信号。例如，当该装置以芯片的方式实现时，该发送单元是该芯片用于向其它芯片或装置发送信号的接口电路。
参考图11，其为本申请实施例提供的一种通信设备的结构示意图。该通信设备用于实现以上实施例中第一网络设备或第一网络设备中的集中式单元、第二网络设备或终端设备的操作。如图11所示，以通信设备为第一网络设备、第二网络设备或终端设备为例，该通 信设备包括：天线1110、射频装置1120、信号处理部分1130。天线1110与射频装置1120连接。在下行方向上，射频装置1120通过天线1110接收网络设备或其他终端设备发送的信息，将网络设备或其他终端设备发送的信息发送给信号处理部分1130进行处理。在上行方向上，信号处理部分1130对终端设备的信息进行处理，并发送给射频装置1120，射频装置1120对终端设备的信息进行处理后经过天线1110发送给网络设备或其他终端设备。
以通信设备为网络设备为例，该通信设备包括：天线1110、射频装置1120、信号处理部分1130。天线1110与射频装置1120连接。在上行方向上，射频装置1120通过天线1110接收终端设备发送的信息，将终端设备发送的信息发送给信号处理部分1130进行处理。在下行方向上，信号处理部分1130对网络设备的信息进行处理，并发送给射频装置1120，射频装置1120对网络设备的信息进行处理后经过天线1110发送给第一终端或其他终端设备。
信号处理部分1130用于实现对数据各通信协议层的处理。信号处理部分1130可以为该通信设备的一个子系统，则该通信设备还可以包括其它子系统，例如中央处理子系统，用于实现对通信设备操作系统以及应用层的处理；再如，周边子系统用于实现与其它设备的连接。信号处理部分1130可以为单独设置的芯片。可选的，以上的装置可以位于信号处理部分1130。
信号处理部分1130可以包括一个或多个处理元件1131，例如，包括一个主控CPU和其它集成电路，以及包括接口电路1133。此外，该信号处理部分1130还可以包括存储元件1132。存储元件1132用于存储数据和程序，用于执行以上方法中通信设备所执行的方法的程序可能存储，也可能不存储于该存储元件1132中，例如，存储于信号处理部分1130之外的存储器中，使用时信号处理部分1130加载该程序到缓存中进行使用。接口电路1133用于与装置通信。以上装置可以位于信号处理部分1130，该信号处理部分1130可以通过芯片实现，该芯片包括至少一个处理元件和接口电路，其中处理元件用于执行以上通信设备执行的任一种方法的各个步骤，接口电路用于与其它装置通信。在一种实现中，实现以上方法中各个步骤的单元可以通过处理元件调度程序的形式实现，例如该装置包括处理元件和存储元件，处理元件调用存储元件存储的程序，以执行以上方法实施例中通信设备执行的方法。存储元件可以为处理元件处于同一芯片上的存储元件，即片内存储元件。
在另一种实现中，用于执行以上方法中通信设备所执行的方法的程序可以在与处理元件处于不同芯片上的存储元件，即片外存储元件。此时，处理元件从片外存储元件调用或加载程序于片内存储元件上，以调用并执行以上方法实施例中通信设备(第一网络设备、第二网络设备或终端设备)执行的方法。
在又一种实现中，通信设备实现以上方法中各个步骤的单元可以是被配置成一个或多个处理元件，这些处理元件设置于信号处理部分1130上，这里的处理元件可以为集成电路，例如：一个或多个ASIC，或，一个或多个DSP，或，一个或者多个FPGA，或者这些类集成电路的组合。这些集成电路可以集成在一起，构成芯片。
实现以上方法中各个步骤的单元可以集成在一起，以片上系统(system-on-a-chip，SOC)的形式实现，该SOC芯片，用于实现以上方法。该芯片内可以集成至少一个处理元件和存储元件，由处理元件调用存储元件的存储的程序的形式实现以上通信设备执行的方法；或者，该芯片内可以集成至少一个集成电路，用于实现以上通信设备执行的方法；或者，可以结合以上实现方式，部分单元的功能通过处理元件调用程序的形式实现，部分单元的功 能通过集成电路的形式实现。
可见，以上装置可以包括至少一个处理元件和接口电路，其中至少一个处理元件用于执行以上方法实施例所提供的任一种通信设备执行的方法。处理元件可以以第一种方式：即调用存储元件存储的程序的方式执行通信设备执行的部分或全部步骤；也可以以第二种方式：即通过处理器元件中的硬件的集成逻辑电路结合指令的方式执行通信设备执行的部分或全部步骤；当然，也可以结合第一种方式和第二种方式执行通信设备执行的部分或全部步骤。
这里的处理元件同以上描述，可以是通用处理器，例如CPU，还可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个ASIC，或，一个或多个微处理器DSP，或，一个或者多个FPGA等，或这些集成电路形式中至少两种的组合。存储元件可以是一个存储器，也可以是多个存储元件的统称。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请实施例还提供一种计算机可读存储介质，其上存储有计算机程序，该计算机程序被计算机执行时实现上述应用于第一网络设备、第二网设备或终端设备对应的任一方法实施例所述的方法。
本申请实施例还提供一种计算机程序产品，该计算机程序产品被计算机执行时实现上述应用于第一网络设备、第二网络设备或终端设备的任一方法实施例所述的方法。
需要指出的是，“第一”、“第二”等词汇，例如，“第一指示信息、第二指示信息”等，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。“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,或c中的至少一项(个)，可以表示：a,b,c,a和b,a和c,b和c,或a和b和c，其中a,b,c可以是单个，也可以是多个。
上述实施例，可以全部或部分地通过软件、硬件、固件或者其任意组合实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。计算机程序产品包括一个或多个计算机程序。在计算机上加载和执行计算机程序时，全部或部分地产生按照本申请 实施例所述的流程或功能。该计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。该计算机程序可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，计算机程序可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，高密度数字视频光盘(digital video disc，DVD))、或者半导体介质(例如，固态硬盘(solid state disk，SSD))等。
本申请实施例还提供一种处理装置，包括处理器和接口；处理器，用于执行上述应用于第一网络设备、第二网络设备或终端设备的任一方法实施例所描述的方法。
应理解，上述处理装置可以是一个芯片，处理器可以通过硬件实现也可以通过软件实现，当通过硬件实现时，该处理器可以是逻辑电路、集成电路等；当通过软件实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码实现，该存储器可以集成在处理器中，也可以位于处理器之外，独立存在。
以上，仅为本申请的具体实施方式，但本申请实施例的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请实施例揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请实施例的保护范围之内。因此，本申请实施例的保护范围应以权利要求的保护范围为准。

Claims (34)

  1. 一种通信方法，其特征在于，所述方法还包括：
    第一网络设备的集中式单元通过所述第一网络设备的分布式单元向终端设备发送第一指示信息；
    所述第一指示信息用于指示所述终端设备配置授权的第一资源，所述第一资源与第一同步信号广播信道块SSB关联；所述第一SSB用于所述终端设备在非激活态下，确定是否使用所述第一资源发送数据。
  2. 根据权利要求1所述的方法，其特征在于，所述第一SSB用于所述终端设备在所述非激活态下，确定是否使用所述第一资源发送数据，包括：
    所述第一SSB的参考信号功率RSRP用于确定所述第一资源的上行同步是否失效；
    在确定所述第一资源的上行同步有效时，确定使用所述第一资源发送数据；
    在确定所述第一资源的上行同步失效时，确定不使用所述第一资源发送数据。
  3. 根据权利要求2所述的方法，其特征在于，所述方法还包括：所述第一SSB用于所述终端设备在所述非激活态下，确定所述第一资源的上行同步失效时，释放所述第一资源。
  4. 根据权利要求2或3所述的方法，其特征在于，所述第一SSB的RSRP用于确定所述第一资源的上行同步是否失效，包括：
    在所述第一SSB的RSRP大于或等于第一阈值时，确定所述第一资源的上行同步有效；
    在所述第一SSB的RSRP的增加变化量大于或等于第二阈值时，或者，在所述第一SSB的RSRP的减少变化量大于或等于第三阈值时，确定所述第一资源的上行同步失效。
  5. 根据权利要求1-4任一项所述的方法，其特征在于，所述方法还包括：
    所述第一网络设备的集中式单元通过所述第一网络设备的分布式单元向所述终端设备发送第二指示信息；
    所述第二指示信息用于指示所述终端设备的配置授权的第二资源，所述第二资源用于所述终端设备在所述非激活态和连接态下，使用所述第二资源发送数据。
  6. 根据权利要求1-5任一项所述的方法，其特征在于，所述方法还包括：
    所述第一网络设备的集中式单元向第二网络设备发送处于非激活态的终端设备的上下文；
    所述第一网络设备的集中式单元向所述第一网络设备的分布式单元发送第一消息，所述第一消息用于指示所述第一网络设备的分布式单元释放所述终端设备的上下文。
  7. 根据权利要求6所述的方法，其特征在于，所述第一网络设备的集中式单元向第二网络设备发送处于非激活态的终端设备的上下文之前，还包括：
    所述第一网络设备的集中式单元接收来自所述第二网络设备的所述终端设备的上下文索取请求。
  8. 根据权利要求6或7所述的方法，其特征在于，所述第一网络设备的集中式单元向第二网络设备发送处于非激活态的终端设备的上下文之前，还包括：
    所述第一网络设备的集中式单元对所述第二网络设备进行身份校验成功。
  9. 根据权利要求6-8任一项所述的方法，其特征在于，所述上下文包括以下一项或多项：
    为所述终端设备配置的配置授权；
    为所述终端设备配置的物理下行控制信道PDCCH的配置信息；
    用于加扰所述PDCCH的临时标识；
    为所述终端设备配置的非激活态无线网络临时标识I-RNTI；
    为所述终端设备配置的无线承载的RLC层的配置信息。
  10. 一种通信方法，其特征在于，所述方法包括：
    第二网络设备向终端设备发送第一指示信息；
    所述第一指示信息用于指示所述终端设备的配置授权的第一资源，所述第一资源与第一同步信号广播信道块SSB关联；所述第一SSB用于所述终端设备在所述终端设备的非激活态下，确定是否使用所述第一资源发送数据。
  11. 根据权利要求10所述的方法，其特征在于，所述第一SSB用于所述终端设备在所述非激活态下，确定是否使用所述第一资源发送数据，包括：
    所述第一SSB的RSRP用于确定所述第一资源的上行同步是否失效；
    在确定所述第一资源的上行同步有效时，确定使用所述第一资源发送数据；
    在确定所述第一资源的上行同步失效时，确定不使用所述第一资源发送数据。
  12. 根据权利要求11所述的方法，其特征在于，所述第一SSB还用于所述终端设备在所述非激活态下，确定所述第一资源的上行同步失效时，释放所述第一资源。
  13. 根据权利要求11或12所述的方法，其特征在于，所述第一SSB的RSRP用于确定所述第一资源的上行同步是否失效，包括：
    在所述第一SSB的RSRP大于或等于第一阈值时，确定所述第一资源的上行同步有效；
    在所述第一SSB的RSRP的增加变化量大于或等于第二阈值时，或者，在所述第一SSB的RSRP的减少变化量大于或等于第三阈值时，确定所述第一资源的上行同步失效。
  14. 根据权利要求10-13任一项所述的方法，其特征在于，所述方法还包括：
    所述第二网络设备向所述终端设备发送第二指示信息，所述第二指示信息用于指示所述终端设备的配置授权的第二资源，所述第二资源用于所述终端设备在所述非激活态和连接态下，使用所述第二资源发送数据。
  15. 根据权利要求10-14任一项所述的方法，其特征在于，所述方法还包括：
    所述第二网络设备接收来自第一网络设备的集中式单元的处于非激活态的终端设备的上下文，所述上下文用于所述第二网络设备为所述终端设备恢复连接态。
  16. 根据权利要求15所述的方法，其特征在于，所述上下文包括以下一项或多项：
    为所述终端设备配置的配置授权；
    为所述终端设备配置的物理下行控制信道PDCCH的配置信息；
    用于加扰所述PDCCH的临时标识；
    为所述终端设备配置的非激活态无线网络临时标识I-RNTI；
    为所述终端设备配置的无线承载的RLC层的配置信息。
  17. 一种通信方法，其特征在于，所述方法包括：
    终端设备通过第一网络设备的分布式单元接收所述第一网络设备的集中式单元发送的第一指示信息，所述第一指示信息用于指示所述终端设备配置授权的第一资源，所述第一资源与第一同步信号广播信道块SSB关联；
    所述终端设备在非激活态下，根据所述第一SSB确定是否使用所述第一资源发送数据。
  18. 一种通信方法，其特征在于，所述方法包括：
    终端设备接收第二网络设备发送的第一指示信息，所述第一指示信息用于指示所述终端设备配置授权的第一资源，所述第一资源与第一同步信号广播信道块SSB关联；
    所述终端设备在非激活态下，根据所述第一SSB确定是否使用所述第一资源发送数据。
  19. 根据权利要求17或18所述的方法，其特征在于，所述终端设备在非激活态下，根据所述第一SSB确定是否使用所述第一资源发送数据，包括：
    所述终端设备根据所述第一SSB的参考信号功率RSRP，确定所述第一资源的上行同步是否失效；
    所述终端设备在确定所述第一资源的上行同步有效时，确定使用所述第一资源发送数据；
    所述终端设备在确定所述第一资源的上行同步失效时，确定不使用所述第一资源发送数据。
  20. 根据权利要求19所述的方法，其特征在于，所述方法还包括：
    所述终端设备在确定所述第一资源的上行同步失效时，释放所述第一资源。
  21. 根据权利要求19或20所述的方法，其特征在于，所述终端设备根据所述第一SSB的RSRP，确定所述第一资源的上行同步是否失效，包括：
    所述终端设备在所述第一SSB的RSRP大于或等于第一阈值时，确定所述第一资源的上行同步有效；
    所述终端设备在所述第一SSB的RSRP的增加变化量大于或等于第二阈值时，或者，在所述第一SSB的RSRP的减少变化量大于或等于第三阈值时，确定所述第一资源的上行同步失效。
  22. 根据权利要求17-21任一项所述的方法，其特征在于，所述方法还包括：
    终端设备通过第一网络设备的分布式单元接收所述第一网络设备的集中式单元发送的第二指示信息；
    所述第二指示信息用于指示所述终端设备的配置授权的第二资源，所述第二资源用于所述终端设备在所述非激活态和连接态下，使用所述第二资源发送数据。
  23. 根据权利要求17-22任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备接收所述第二网络设备发送第二指示信息，所述第二指示信息用于指示所述终端设备的配置授权的第二资源，所述第二资源用于所述终端设备在所述非激活态和连接态下，使用所述第二资源发送数据。
  24. 根据权利要求17-23任一项所述的方法，其特征在于，所述终端设备通过所述第二网络设备获得的终端设备的上下文恢复至连接态，所述终端设备的上下文为所述第二网络设备通过接收来自第一网络设备的集中式单元获得的。
  25. 一种通信方法，其特征在于，所述方法包括：
    第一网络设备的集中式单元向第二网络设备发送处于非激活态的终端设备的上下文；
    所述第一网络设备的集中式单元向所述第一网络设备的分布式单元发送第一消息，所述第一消息用于指示所述第一网络设备的分布式单元释放所述终端设备的上下文。
  26. 根据权利要求25所述的方法，其特征在于，所述第一网络设备的集中式单元向第二网络设备发送处于非激活态的终端设备的上下文之前，还包括：
    所述第一网络设备的集中式单元接收来自所述第二网络设备的所述终端设备的上下文索取请求。
  27. 根据权利要求25或26所述的方法，其特征在于，所述第一网络设备的集中式单元向第二网络设备发送处于非激活态的终端设备的上下文之前，还包括：
    所述第一网络设备的集中式单元对所述第二网络设备进行身份校验成功。
  28. 根据权利要求25-27任一项所述的方法，其特征在于，所述上下文包括以下一项或多项：
    为所述终端设备配置的配置授权；
    为所述终端设备配置的物理下行控制信道PDCCH的配置信息；
    用于加扰所述PDCCH的临时标识；
    为所述终端设备配置的非激活态无线网络临时标识I-RNTI；
    为所述终端设备配置的无线承载的RLC层的配置信息。
  29. 根据权利要求25-28任一项所述的方法，其特征在于，所述处于非激活态的终端设备用于与所述第一网络设备传输数据。
  30. 一种通信装置，其特征在于，包括用于执行如权利要求1至29中任一项所述方法的单元或模块。
  31. 一种通信装置，其特征在于，包括处理器和存储器，所述处理器和所述存储器耦合，所述处理器用于控制所述装置实现如权利要求1-29中任一项所述的方法。
  32. 一种通信装置，其特征在于，包括：处理器和通信接口，所述通信接口用于所述装置进行通信，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得所述装置执行如权利要求1-29任一项所述的方法。
  33. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有指令，当所述指令在计算机上运行时，使得所述计算机执行如权利要求1-29任一所述的方法。
  34. 一种芯片系统，其特征在于，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片系统的通信设备执行权利要求1-29中任一项所述的方法。
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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102943782B1 (ko) * 2019-09-27 2026-03-24 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 무선 통신의 방법 및 단말 장치
CN115150040A (zh) * 2021-03-31 2022-10-04 华为技术有限公司 一种通信方法及装置
CN117322126A (zh) * 2021-08-17 2023-12-29 Oppo广东移动通信有限公司 通信方法及通信装置
CN118509924A (zh) * 2023-02-16 2024-08-16 华为技术有限公司 一种通信方法及相关设备
CN118695363A (zh) * 2023-03-24 2024-09-24 华为技术有限公司 一种通信方法及装置
CN120456341A (zh) * 2024-02-07 2025-08-08 华为技术有限公司 数据传输方法和通信装置
CN120603068A (zh) * 2024-03-05 2025-09-05 华为技术有限公司 通信方法及相关装置
WO2025194498A1 (en) * 2024-03-22 2025-09-25 Huawei Technologies Co., Ltd. Wireless communication devices, methods and system for transmitting synchronization signals

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110474744A (zh) * 2018-05-11 2019-11-19 维沃移动通信有限公司 一种传输资源指示方法、网络设备及终端
CN110622545A (zh) * 2017-09-25 2019-12-27 Oppo广东移动通信有限公司 资源配置的方法、终端设备和网络设备
CN110798861A (zh) * 2018-08-02 2020-02-14 电信科学技术研究院有限公司 发送系统信息的方法、cu实体及du实体
US20210037463A1 (en) * 2018-02-09 2021-02-04 Lg Electronics Inc. Method of operating in idle mode and apparatus using same

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11399322B2 (en) * 2018-09-17 2022-07-26 Telefonaktiebolaget Lm Ericsson (Publ) User equipment, network node and methods in a wireless communications network
CN111757557B (zh) * 2019-03-29 2024-04-05 北京三星通信技术研究有限公司 支持接入封闭网络的方法、ue、基站及可读存储介质
US12160731B2 (en) 2019-09-06 2024-12-03 Lg Electronics Inc. Method and apparatus for supporting UP security for MO-EDT in CU-DU split in a wireless communication system
CN114902745B (zh) * 2019-12-31 2025-01-17 华为技术有限公司 一种上下文管理方法及装置
CN116235603A (zh) * 2020-07-15 2023-06-06 三星电子株式会社 用于小数据传输的方法和装置
CN116965147A (zh) * 2021-01-13 2023-10-27 谷歌有限责任公司 管理到多个集中式单元的连接
WO2022155414A1 (en) * 2021-01-14 2022-07-21 Ofinno, Llc Inactive context management
CN115150040A (zh) * 2021-03-31 2022-10-04 华为技术有限公司 一种通信方法及装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110622545A (zh) * 2017-09-25 2019-12-27 Oppo广东移动通信有限公司 资源配置的方法、终端设备和网络设备
US20210037463A1 (en) * 2018-02-09 2021-02-04 Lg Electronics Inc. Method of operating in idle mode and apparatus using same
CN110474744A (zh) * 2018-05-11 2019-11-19 维沃移动通信有限公司 一种传输资源指示方法、网络设备及终端
CN110798861A (zh) * 2018-08-02 2020-02-14 电信科学技术研究院有限公司 发送系统信息的方法、cu实体及du实体

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CATT: "Analysis on SDT Procedures using CG", 3GPP DRAFT; R2-2009369, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. electronic; 20201102 - 20201113, 23 October 2020 (2020-10-23), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051942330 *
SAMSUNG: "Configured Grant based Small Data Transmission", 3GPP DRAFT; R2-2009094, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Electronic; 20201102 - 20201113, 23 October 2020 (2020-10-23), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051942125 *
See also references of EP4311149A4 *

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