WO2015131376A1 - 基站、终端及切换方法 - Google Patents

基站、终端及切换方法 Download PDF

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Publication number
WO2015131376A1
WO2015131376A1 PCT/CN2014/073001 CN2014073001W WO2015131376A1 WO 2015131376 A1 WO2015131376 A1 WO 2015131376A1 CN 2014073001 W CN2014073001 W CN 2014073001W WO 2015131376 A1 WO2015131376 A1 WO 2015131376A1
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WO
WIPO (PCT)
Prior art keywords
channel
terminal
base station
configuration
connection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/073001
Other languages
English (en)
French (fr)
Inventor
戴明增
曾清海
张健
张宏平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP14885023.3A priority Critical patent/EP3107331B1/en
Priority to JP2016555725A priority patent/JP6366729B2/ja
Priority to CN201480001029.XA priority patent/CN105103514B/zh
Priority to PCT/CN2014/073001 priority patent/WO2015131376A1/zh
Publication of WO2015131376A1 publication Critical patent/WO2015131376A1/zh
Priority to US15/255,930 priority patent/US10004013B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/06—Reselecting a communication resource in the serving access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/25—Maintenance of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/10—Flow control between communication endpoints
    • H04W28/14—Flow control between communication endpoints using intermediate storage
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0838—Random access procedures, e.g. with 4-step access using contention-free random access [CFRA]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a base station, a terminal, and a handover method.
  • Unlicensed or unlicensed spectrum (unlicensed) according to the latest release of the FCC International Spectrum White Paper Spectrum)
  • the resource is larger than the licensed spectrum resource.
  • Unlicensed spectrum includes for industrial, scientific, and medical (ISM, Industrial, scientific and medical)
  • the frequency bands of equipment such as medical, for example, in the United States, there are three frequency bands 902-928 MHz, 2400-2484.5 MHz and 5725-5850 MHz, of which 2.4 GHz is the common ISM band for all countries.
  • LTE long-term evolution system
  • ASA authorized Shared access
  • LSA licensed shared access
  • LTE needs to detect whether a device such as a radar is using an unlicensed spectrum. Once it is detected that a device such as a radar is using an unlicensed spectrum, LTE needs to stop transmitting information on the unlicensed spectrum and switch to the available non-authorized. Spectrum. Since the signals of devices such as radars may be random and dynamic, the switching between unlicensed spectrums also needs to be dynamic.
  • the existing inter-spectrum switching is static or semi-static, and cannot meet the requirements of LTE dynamic switching, and the user data is interrupted during the switching process, which affects the user experience.
  • the embodiments of the present invention provide a base station, a terminal, and a handover method, which are capable of performing dynamic handover.
  • the first aspect provides a base station, where the base station includes: a sending module, configured to send an indication message to the terminal, where the indication message is used to indicate that the terminal further establishes a connection with the base station by using the second channel while maintaining the connection with the base station by using the first channel.
  • the first channel and the second channel have different frequencies;
  • the receiving module is configured to receive, by using the first channel, an access message sent by the terminal, where the access message indicates that the terminal has established a connection with the base station by using the second channel;
  • the sending module is further configured to: Sending a handover command to the terminal, the handover command instructing the terminal to switch communication with the base station from the first channel to the second channel; and the handover module, configured to switch communication with the terminal from the first channel to the second channel.
  • the indication message further includes a random access opportunity parameter
  • the base station further includes a discrete module, configured to use the random access timing parameter to establish a connection between the discrete terminal and the base station by using the second channel. opportunity.
  • the handover command further includes a channel switching time, where the channel switching time is used to indicate a handover time of the terminal from the first channel to the second channel.
  • the handover command further includes a channel configuration, where the channel configuration is used by the terminal to use the second channel for data transmission. Configuration.
  • the channel configuration indication terminal communicates with the base station on the second channel by using the same configuration as the first channel, where the same configuration refers to The bandwidth of the frequency resources of the first channel and the second channel remains unchanged, and the center frequency offset of the first channel and the second channel is relative value, and the relative value is the frequency difference between the first channel and the second channel.
  • the channel configuration indication terminal maintains the first channel until the buffered data on the first channel is sent and received, and is used on the second channel.
  • the different configurations of the first channel communicate with the base station.
  • the second aspect provides a terminal, where the terminal includes: a receiving module, configured to receive an indication message sent by the base station, where the indication message is used to indicate that the terminal further establishes a connection with the base station by using the second channel while maintaining the connection with the base station by using the first channel.
  • the first channel and the second channel have different frequencies;
  • the connection module is configured to establish a connection with the base station by using the second channel, and the sending module is configured to send an access message to the base station by using the first channel, where the access message indicates that the terminal has passed
  • the second channel establishes a connection with the base station;
  • the receiving module is further configured to receive a handover command sent by the base station, where the handover command instructs the terminal to switch the communication with the base station from the first channel to the second channel; and the handover module is configured to: The first channel is switched to the second channel.
  • the indication message further includes a random access timing parameter, where the random access timing parameter is used for the time when the discrete terminal randomly establishes a connection with the base station by using the second channel, and the connection module is further used for The terminal establishes a connection with the base station according to the timing of randomly establishing a connection with the base station through the second channel.
  • the handover command further includes a channel switching time, where the channel switching time is used to indicate a handover time of the terminal from the first channel to the second channel.
  • the handover command further includes a channel configuration, where the channel configuration is used by the terminal to use the second channel for data transmission. Configuration.
  • the channel configuration indication terminal communicates with the base station on the second channel by using the same configuration as the first channel, where the same configuration refers to The bandwidth of the frequency resources of the first channel and the second channel remains unchanged, and the center frequency offset of the first channel and the second channel is relative value, and the relative value is the frequency difference between the first channel and the second channel.
  • the channel configuration indication terminal maintains the first channel until the buffered data on the first channel is sent and received, and is used on the second channel.
  • the different configurations of the first channel communicate with the base station.
  • a third aspect provides a base station, where the base station includes a network interface, a memory, a processor, and a bus.
  • the network interface, the memory, and the processor are connected to the bus.
  • the memory is used to store a program, and the processor is used to invoke the program to perform the following steps:
  • the interface sends an indication message to the terminal, where the indication message is used to indicate that the terminal further establishes a connection with the base station by using the second channel, where the first channel and the second channel have different frequencies;
  • the channel receives an access message sent by the terminal, the access message indicates that the terminal has established a connection with the base station through the second channel, and sends a handover command to the terminal through the network interface, where the handover command instructs the terminal to switch the communication with the base station from the first channel to the second Channel; switching communication with the terminal from the first channel to the second channel.
  • the indication message further includes a random access timing parameter
  • the program further performs the following steps: the random access timing parameter discrete terminal establishes a connection with the base station randomly through the second channel.
  • the handover command further includes a channel switching time, where the channel switching time is used to indicate a handover time of the terminal from the first channel to the second channel.
  • the handover command further includes a channel configuration, where the channel configuration indicates that the terminal uses the second channel for data transmission. Configuration.
  • the channel configuration indication terminal communicates with the base station on the second channel by using the same configuration as the first channel, where the same configuration refers to The bandwidth of the frequency resources of the first channel and the second channel remains unchanged, and the center frequency offset of the first channel and the second channel is relative value, and the relative value is the frequency difference between the first channel and the second channel.
  • the channel configuration indication terminal maintains the first channel until the buffered data on the first channel is sent and received, and is used on the second channel.
  • the different configurations of the first channel communicate with the base station.
  • a fourth aspect provides a terminal, where the terminal includes a network interface, a memory, a processor, and a bus, a network interface, a memory, and a processor and a bus connection, wherein: the memory is used to store a program, and the processor is configured to invoke the program to perform the following steps:
  • the interface receives an indication message sent by the base station, where the indication message is used to indicate that the terminal further establishes a connection with the base station by using the second channel, and the first channel and the second channel have different frequencies;
  • the second channel establishes a connection with the base station; the access message is sent to the base station by using the first channel, the access message indicates that the terminal has established a connection with the base station through the second channel; and the handover command sent by the base station is further received through the network interface, and the handover command indicates that the terminal will
  • the communication of the base station is switched from the first channel to the second channel; the communication with the base station is switched from the first channel to the second channel.
  • the indication message further includes a random access timing parameter, where the random access timing parameter is used for the timing at which the discrete terminal randomly establishes a connection with the base station by using the second channel, and the program further performs the following steps. : Instructing the terminal to establish a connection with the base station according to the timing of randomly establishing a connection with the base station through the second channel.
  • the handover command further includes a channel switching time, where the channel switching time is used to indicate a handover time of the terminal from the first channel to the second channel.
  • the handover command further includes a channel configuration, where the channel configuration indicates that the terminal uses the second channel for data transmission. Configuration.
  • the channel configuration indication terminal communicates with the base station on the second channel by using the same configuration as the first channel, where the same configuration
  • the bandwidth of the frequency resources of the first channel and the second channel remains unchanged, and the center frequency offset of the first channel and the second channel is relative value, and the relative value is the frequency difference between the first channel and the second channel.
  • the channel configuration indication terminal maintains the first channel until the buffered data on the first channel is sent and received, and is used on the second channel.
  • a configuration different from the first channel communicates with the base station.
  • the fifth aspect provides a handover method, where the method includes the following steps: the base station sends an indication message to the terminal, where the indication message is used to indicate that the terminal establishes a connection with the base station through the second channel, if the terminal maintains the connection with the base station by using the first channel, The first channel and the second channel have different frequencies; the base station receives the access message sent by the terminal through the first channel, the access message indicates that the terminal has established a connection with the base station through the second channel; the base station sends a handover command to the terminal, and the handover command indicates the terminal.
  • the communication with the base station is switched from the first channel to the second channel; the base station switches communication with the terminal from the first channel to the second channel.
  • the base station includes a primary cell and a secondary cell, where the secondary cell includes the first channel and the second channel:
  • the step of the base station transmitting the indication message to the terminal includes: the base station sending an indication message to the terminal by using the first channel or the primary cell;
  • the step of the base station transmitting the handover command to the terminal further includes: the base station sending the handover command to the terminal by using the first channel or the primary cell.
  • the indication message further includes a random access timing parameter, and the random access timing parameter is used by the discrete terminal to randomly establish with the base station by using the second channel. The timing of the connection.
  • the handover command further includes a channel switching time, where the channel switching time is used to indicate the terminal from the first channel to the second channel. Switching time.
  • the handover command further includes a channel configuration, where the channel configuration indicates a configuration used by the terminal when using the second channel for data transmission .
  • the channel configuration indication terminal communicates with the base station by using the same configuration as the first channel on the second channel, where the same configuration
  • the bandwidth of the frequency resources of the first channel and the second channel remains unchanged, and the center frequency of the first channel and the second channel are offset relative values, and the relative value is the frequency difference between the first channel and the second channel.
  • the channel configuration indication terminal keeps the first channel until the buffered data on the first channel is sent and received, and is used on the second channel. A configuration different from the first channel communicates with the base station.
  • the sixth aspect provides a handover method, where the method includes the following steps: the terminal receives an indication message sent by the base station, where the indication message is used to indicate that the terminal further establishes a connection with the base station by using the second channel, while maintaining the connection with the base station by using the first channel, The first channel and the second channel have different frequencies; the terminal establishes a connection with the base station through the second channel; the terminal sends an access message to the base station through the first channel, and the access message indicates that the terminal has established a connection with the base station through the second channel; Receiving a handover command sent by the base station, the handover command instructing the terminal to switch communication with the base station from the first channel to the second channel; and the terminal switches communication with the base station from the first channel to the second channel.
  • the indication message further includes a random access timing parameter, where the random access timing parameter is used for the time when the discrete terminal randomly establishes a connection with the base station by using the second channel, and the terminal passes the second channel.
  • Establishing the connection with the base station further includes: the terminal establishing a connection with the base station according to a timing of randomly establishing a connection with the base station by using the second channel.
  • the handover command further includes a channel switching time, where the channel switching time is used to indicate a handover time of the terminal from the first channel to the second channel.
  • the handover command further includes a channel configuration, where the channel configuration indicates a configuration used by the terminal when using the second channel for data transmission .
  • the channel configuration indication terminal communicates with the base station on the second channel by using the same configuration as the first channel, where the same configuration refers to The bandwidth of the frequency resources of the first channel and the second channel remains unchanged, and the center frequency offset of the first channel and the second channel is relative value, and the relative value is the frequency difference between the first channel and the second channel.
  • the channel configuration indication terminal maintains the first channel until the buffered data on the first channel is sent and received, and is used on the second channel.
  • the different configurations of the first channel communicate with the base station.
  • the embodiment of the present invention provides a base station, where the base station further sends a handover command to the terminal, if the terminal that is sent by the first channel receiving terminal has established an access message with the base station through the second channel, The communication between the terminal and the base station is indicated to be switched from the first channel to the second channel and the communication with the terminal is switched from the first channel to the second channel. Therefore, the present invention enables the base station and the terminal to perform dynamic channel switching, improve the switching time, maintain the continuity of data transmission, and improve the user experience.
  • FIG. 1 is a schematic diagram of a working process when a switching system performs channel switching according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • 3 is a process in which the communication between the base station and the terminal is synchronously switched from the first channel to the second channel according to the first channel configuration of the present invention
  • 4 is another process of the present invention for synchronously switching communication between a base station and a terminal from a first channel to a second channel according to the first channel configuration;
  • 6 is another process of the present invention for synchronously switching communication between a base station and a terminal from a first channel to a second channel according to a second channel configuration;
  • FIG. 7 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram of a method in which a terminal and a base station randomly establish a connection in a competitive manner
  • FIG. 9 is a schematic diagram of a manner in which a terminal and a base station randomly establish a connection in a non-competitive manner
  • FIG. 10 is a schematic structural diagram of another base station according to an embodiment of the present disclosure.
  • FIG. 11 is another schematic structural diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 12 is a flowchart of a handover method according to an embodiment of the present invention.
  • FIG. 13 is another flowchart of a handover method according to an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of an operation of a handover system when performing channel switching according to an embodiment of the present invention.
  • the switching system 10 of the embodiment of the present invention includes a base station 11 and a terminal 12.
  • the base station 11 performs information transmission with the terminal 12 in real time through the mobile communication switching center.
  • channel switching can be understood as the communication between the base station and the terminal is adjusted from one frequency to another.
  • the base station 11 includes a primary cell and a secondary cell. If the base station 11 operates on the first channel of the secondary cell, the base station 11 needs to switch the working channel of the secondary cell from the first channel to the second channel. .
  • the base station 11 first transmits an indication message to the terminal 12 through the primary cell, instructing the terminal 12 to maintain communication with the base station 11 through the first channel (i.e., the channel on which the frequency 1 is located), and establish a connection with the base station 11 through the second channel.
  • the terminal 12 establishes a connection with the base station 11 through the second channel, and then sends a message for successfully establishing a connection to the base station 11 through the first channel.
  • the base station 11 further transmits a handover command to the terminal 12 through the primary cell.
  • the communication indicating the terminal 12 and the base station 11 is switched from the first channel to the second channel.
  • the handover command further indicates that the handover of the terminal from the first channel to the second channel is synchronized with the handover of the base station from the first channel to the second channel, so as to ensure that the secondary cell maintains the channel and the terminal at any time. Communication improves the user experience.
  • the base station 11 can also send an indication message and a handover command to the terminal 12 through the first channel of the secondary cell.
  • the base station 11 and the terminal 12 of the switching system 10 of the present embodiment can perform channel switching simultaneously, speed up the switching time, maintain the continuity of data transmission, and improve the user experience.
  • FIG. 2 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station 11 of this embodiment includes a sending module 110, a receiving module 111, and a switching module 113.
  • the sending module 110 is configured to send an indication message to the terminal 12, where the indication message is used to indicate that the terminal 12 establishes a connection with the base station 11 through the second channel, where the terminal 12 remains connected to the base station 11 through the first channel, the first channel and The second channel has a different frequency.
  • the sending module 110 sends an indication message to the terminal 12 through the first channel or the primary cell, as described above.
  • the receiving module 111 is configured to receive, by using the first channel, an access message sent by the terminal 12, where the access message is used to indicate that the terminal 12 has established a connection with the base station 11 through the second channel.
  • the sending module 110 is further configured to send a handover command to the terminal 12, wherein the handover command instructs the terminal 12 to switch communication with the base station 11 from the first channel to the second channel.
  • the sending module 110 sends a handover command to the terminal 12 through the first channel or the primary cell, as described above.
  • the switching module 113 is configured to switch communication with the terminal 12 from the first channel to the second channel.
  • the base station 11 of the present embodiment can perform channel switching in synchronization with the terminal 12, speed up the handover time, maintain the continuity of data transmission, and improve the user experience.
  • the base station 11 further includes an indication message generating module 114, and the indication message generating module 114 is configured to determine whether the first channel being served is interfered, such as radar signal interference. And generating an indication message when the strength of the interference signal is greater than or equal to a preset interference detection threshold.
  • the indication message generating module 114 can also be used to generate an indication message if the first channel needs to be turned off due to energy saving or the like.
  • the frequency of the second channel is included in the indication message.
  • the frequency of the second channel has multiple representations, such as absolute frequency and logical value (Absolute Radio). Frequency Channel Number (ARFCN) and the offset from the frequency of the first channel (ie, frequency 1 above).
  • ARFCN Frequency Channel Number
  • the absolute frequency may be calculated according to the logic value or the frequency of the first channel and the offset thereof.
  • the indication message further includes a random access timing parameter.
  • the indication message generation module 114 further includes a discrete module 115 for utilizing the random access opportunity parameter to discriminate the timing at which the terminal 12 randomly establishes a connection with the base station 11 through the second channel.
  • the second channel may be an authorized channel or an unlicensed channel.
  • the base station 11 of the present embodiment instructs the terminal 12 to randomly establish a connection with the base station 11 through the second channel.
  • the random access timing parameter requires the timing at which the discrete terminal 12 establishes a connection with the base station 11 through the second channel, that is, a random timing is generated when the terminal 12 can establish a connection with the base station 11 through the second channel, and the terminal 12 is based on The random occasion establishes a connection with the base station 11, thereby avoiding that all terminals establish a connection with the base station 11 at the same timing.
  • the terminal 12 can randomly derive a random number of 0-9 (that is, the random time in the foregoing), if the derived random number is 5, the terminal 12 is instructed to establish a connection with the base station 11 through the second channel after receiving the indication message.
  • the manner in which the terminal 12 and the base station 11 randomly establish a connection includes two types of contention and non-competition.
  • the base station 11 may also instruct the terminal 12 to establish a connection directly with the base station 11 through the second channel. For example, if the base station 11 does not need to obtain the uplink transmission advance amount through the random access procedure or the uplink transmission advance amount does not need to be changed, the base station 11 can instruct the terminal 12 to directly establish a connection with the base station 11 through the second channel.
  • the receiving module 111 receives the access message sent by the terminal 12, and the terminal 12 has established a connection with the base station 11 through the second channel or the terminal 12 has directly established a connection with the base station 11 through the second channel.
  • the handover command sent by the sending module 110 includes a channel switching time, where the channel switching time is used to indicate the switching time of the terminal 12 from the first channel to the second channel.
  • the channel switching time is SFN (System Frame Number, system frame number)
  • the terminal 12 performs channel switching at the boundary of the SFN.
  • the switching module 113 will also perform channel switching at the boundary of the SFN to ensure synchronous switching with the terminal 12.
  • the handover command further includes a channel configuration, and the channel configuration indicates a configuration used by the terminal 12 when using the second channel for data transmission.
  • the channel configuration used by the terminal 12 for data transmission on the second channel may include two types:
  • the first type of channel is configured such that terminal 12 communicates with base station 11 on the second channel using the same configuration as the first channel.
  • the frequency of the first channel and the frequency of the second channel are completely aligned in the time domain, such as the SFN of the first channel and the SFN boundary of the second channel are perfectly aligned.
  • the bandwidth of the frequency resources of the first channel and the second channel remains unchanged, and the center frequency offset of the first channel and the second channel is relative value, and the relative value is the frequency difference between the first channel and the second channel.
  • MAC Medium Access Control, media access control configuration, HARQ (Hybrid Automatic Repeat) Request, hybrid automatic repeat request
  • ACK Acknowledge, response
  • NACK Not Acknowledge, the feedback of the negative response is still in the original time domain feedback, and the frequency of its feedback plus the difference from the frequency of the first channel.
  • FIG. 3 is for HARQ processing, as shown in FIG. 11 transmits UL through the first channel in the first subframe Grant (uplink command) to the terminal 12, instructing the terminal 12 to transmit the UL through the first channel according to the UL Grant in the fourth subframe.
  • Data uplink data
  • the terminal 12 will perform channel switching in the fifth subframe, start transmitting data on the second channel, and the terminal 12 turns off the first channel.
  • the base station 11 also performs channel switching in the fifth subframe, starts transmitting data on the second channel, and the base station 11 also turns off the first channel.
  • the uplink data feedback ACK/NACK that the base station 11 originally feeds back in the 8th subframe of the first channel is fed back in the 8th subframe of the second channel after the channel switching, and uses the same time domain resource, the center value of the frequency. Offset relative value, the relative value being the frequency difference between the first channel and the second channel.
  • FIG. 4 is for UL data processing.
  • the terminal 12 receives the UL in the 4th subframe. Grant, terminal 12 according to the UL on the 8th subframe The Grant transmits UL data to the base station 11 through the first channel, assuming that the terminal 12 performs channel switching in the fifth subframe, and the terminal 12 turns off the first channel, and the terminal is in the eighth subframe according to the UL. The Grant transmits UL data to the base station 11 through the second channel. Thereby, the base station 11 and the terminal 12 are synchronized to perform channel switching.
  • Grant resource allocation for example, a 20 MHz cell, and a physical resource block (Physical Resource Block) that can be divided into 100 equal parts in one intra-subframe frequency domain.
  • PRB Physical Resource Block
  • the first type of resource allocation is: the frequency domain is composed of a starting address and a length, and can indicate the starting position and length of the uplink physical resource block.
  • the second resource allocation manner is: the frequency domain is formed by a specific location, and the type may indicate a specific location where the uplink physical resource is fast.
  • the channel in which the terminal 12 communicates with the base station 11 needs to be switched from the first channel to the second channel, resulting in a frequency offset, and the terminal 12 needs to recalculate the UL in the manner described above.
  • the specific location of Grant is the specific location of Grant.
  • the above describes the first channel configuration used by the terminal 12 for data transmission on the second channel.
  • the second channel configuration will be described below:
  • the terminal 12 maintains a communication connection with the first channel until the buffered data on the first channel is transmitted and received, and communicates with the base station 11 on a second channel using a different configuration than the first channel.
  • the frequency of the first channel and the frequency of the second channel are indicated to be fully aligned in the time domain, such as the SFN of the first channel and the SFN boundary of the second channel are fully aligned.
  • Terminal 12 uses a different configuration than the first channel on the second channel.
  • the above configuration includes at least one of the following information: information frequency, bandwidth, physical layer, and MAC layer configuration.
  • the above configuration can be either the default configuration or a different configuration in advance.
  • the terminal 12 is instructed to transmit new data on the second channel, the communication connection with the first channel is maintained until the buffer data transmission and reception before the channel switching time on the first channel is completed.
  • FIG. 5 and FIG. 6 are also described by using HARQ feedback and UL scheduling examples.
  • the base station 11 allocates a UL Grant through the first channel in the fourth subframe. 1 to the terminal 12, starting channel switching in the 5th subframe, that is, assigning a UL Grant through the second channel 2 is given to terminal 12 while maintaining communication with the first channel.
  • the terminal 12 also starts channel switching in the fifth subframe, that is, receives the UL allocated by the base station 11 through the second channel. Grant2, while maintaining communication with the first channel, that is, transmitting uplink data through the first channel according to UL Grant 1 in the eighth subframe, and UL Grant in the ninth subframe. 2 transmitting uplink data through the second channel.
  • the base station 11 completes the transmission of the related data before the switching time of the first channel, and then closes the first channel, and the terminal 12 receives the ACK sent by the base station 11. After the feedback, the first channel is also closed.
  • the base station 11 schedules downlink data through the first channel in the fourth subframe, and starts channel switching in the fifth subframe, that is, downlink data is scheduled through the second channel while maintaining communication with the first channel.
  • the terminal 12 performs channel switching in the fifth subframe, that is, receives the downlink data sent by the base station 11 through the second channel while maintaining communication with the first channel, that is, the terminal 12 performs HARQ through the first channel in the eighth subframe.
  • Feedback the terminal performs HARQ feedback through the second channel in the ninth subframe.
  • the terminal 12 fails to successfully parse the downlink data scheduled by the base station 11 through the first channel, if the CRC check fails, the terminal 12 feeds back the NACK to the base station 11 through the first channel, and the base station 11 continues to retransmit at the 11th subframe according to the NACK. The terminal 12 continues to perform HRAQ feedback in the 15th subframe. If the ACK is fed back and there is no other buffered data, the terminal 12 turns off the first channel. The base station 11 also turns off the first channel at the same time.
  • the sending module 110 sends the switching command in the following manner:
  • Sending in the form of a RRC message can extend or redefine a message on an existing dedicated message.
  • System messages can also be used to indicate channel configuration through system messages.
  • MAC CE Medium Access Control Control
  • the element media access control unit is sent in the form of a MAC CE or the like.
  • the third type send in the form of physical layer messages, such as defining a DCI (Downlink Control) Information, downlink control information) type, included in PDCCH (Physical Downlink Control) In the Channel, the physical downlink control channel, the DCI type includes channel switching time and channel configuration.
  • DCI Downlink Control
  • PDCCH Physical Downlink Control
  • the base station 11 and the terminal 12 of the present embodiment can perform channel switching simultaneously on the one hand, speed up the handover time, maintain the continuity of data transmission, and improve the user experience; on the other hand, the base station 11
  • the terminal 12 and the base station 11 are randomly established to establish a connection, thereby improving the smoothness of the connection between the terminal 12 and the base station 11.
  • FIG. 7 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • the terminal 12 of this embodiment includes a receiving module 120, a connection module 121, a sending module 122, and a switching module 124.
  • the receiving module 120 is configured to receive the indication message sent by the base station 11, where the indication message is used to indicate that the terminal 12 establishes a connection with the base station 11 through the second channel, the first channel, while maintaining the connection with the base station 11 through the first channel. It has a different frequency than the second channel.
  • the connection module 121 is configured to establish a connection with the base station 11 through the second channel.
  • the sending module 122 is configured to send an access message by using a first channel, where the access message indicates that the terminal 12 has established a connection with the base station 11 through the second channel.
  • the receiving module 120 is further configured to receive a handover command sent by the base station 11, where the handover command is used to instruct the terminal 12 to switch the communication with the base station 11 from the first channel to the second channel.
  • the switching module 124 is configured to switch from the first channel to the second channel according to the communication of the handover command with the base station 11.
  • the terminal 12 and the base station 11 of the present embodiment can perform channel switching simultaneously, speed up the handover time, maintain the continuity of data transmission, and improve the user experience.
  • the indication message further includes a random access timing parameter, and the random access timing parameter is used for the timing at which the discrete terminal 12 randomly establishes a connection with the base station 11 through the second channel.
  • the connection module 121 is further configured to establish, by the terminal 12, a connection with the base station 11 according to the timing of randomly establishing a connection with the base station 11 through the second channel.
  • the timing at which the random access timing parameter discrete terminal 12 randomly establishes a connection with the base station 11 through the second channel is as described above, and details are not described herein again.
  • the manner in which the terminal 12 and the base station 11 randomly establish a connection includes two types of contention and non-competition.
  • connection establishment mode when the connection establishment mode is competitive, please refer to FIG. 8 together, and specifically includes the following steps:
  • Step 1 The terminal 12 sends a random access Preamble (preamble) for synchronization to the base station 11;
  • Step 2 The base station 11 sends the response feedback information and the resources available for the terminal 12 to send the resource request information to the terminal 12;
  • Step 3 The terminal 12 sends a resource request to the base station 11 by using the resource allocated by the base station 11;
  • Step 4 The base station 11 feeds back the data transmission resource to the terminal 12.
  • the terminal 12 establishes a connection with the base station 11 through the second channel after receiving the indication message, and the specific terminal 12 performs the above step 1 in the fifth subframe.
  • connection method is non-competitive, please refer to FIG. 9 together, including the following steps:
  • Step 1 The base station 11 allocates a RA Dedicated Preamble to the terminal 12;
  • Step 2 The terminal 12 uses the allocated random dedicated preamble, and sends the use message to the base station 11;
  • Step 3 The base station 11 transmits response feedback information and resources available for the terminal 12 to transmit resource request information.
  • the random dedicated preamble allocated by the base station 11 may be included in the indication message.
  • the base station 11 may also instruct the terminal 12 to establish a connection directly with the base station 11 through the second channel.
  • the sending module 122 sends the information that the resource allocation is received in the contention mode, or receives the response information sent by the base station 11 and the resource that can be used by the terminal 12 to send the resource request information in the non-contention mode, or
  • the base station 11 reads a message such as a PSS/SSS and/or a system message to the base station 11 when the connection is directly established.
  • the handover command includes a channel switching time
  • the channel switching time is used to indicate a handover time of the terminal 12 from the first channel to the second channel.
  • the channel switching time is SFN (System Frame Number, system frame number)
  • the terminal 12 performs channel switching at the boundary of the SFN.
  • the switching module 113 will also perform channel switching at the boundary of the SFN to ensure synchronous switching with the terminal 12.
  • the handover command further includes a channel configuration, where the channel configuration is used to indicate a configuration used by the terminal 12 when using the second channel for data transmission.
  • the first is that the channel configuration indicates that the terminal 12 communicates with the base station 11 on the second channel using the same configuration as the first channel.
  • the frequency of the first channel and the frequency of the second channel are completely aligned in the time domain, such as the SFN of the first channel and the SFN boundary of the second channel are perfectly aligned.
  • the bandwidth of the frequency resources of the first channel and the second channel remains unchanged, and the center frequency offset of the first channel and the second channel is relative value, and the relative value is the frequency difference between the first channel and the second channel.
  • MAC Medium Access Control, media access control configuration, HARQ (Hybrid Automatic Repeat) Request, hybrid automatic repeat request
  • ACK Acknowledge, response
  • NACK Not Acknowledge, the feedback of the negative response is still in the original time domain feedback, and the frequency of its feedback plus the difference from the frequency of the first channel.
  • the second type is that the channel configuration indicates that the terminal 12 maintains the first channel until the buffered data on the first channel is transmitted and received, and communicates with the base station 11 on the second channel using a configuration different from that of the first channel.
  • the frequency of the first channel and the frequency of the second channel are indicated to be fully aligned in the time domain, such as the SFN of the first channel and the SFN boundary of the second channel are fully aligned.
  • Terminal 12 uses a different configuration than the first channel on the second channel.
  • the above configuration includes at least one of the following information: information frequency, bandwidth, physical layer, and MAC layer configuration.
  • the above configuration can be either the default configuration or a different configuration in advance.
  • the terminal 12 is instructed to transmit new data on the second channel, the communication connection with the first channel is maintained until the buffer data transmission and reception before the channel switching time on the first channel is completed.
  • the base station 11 in this embodiment can perform channel switching in synchronization with the terminal 12, speed up the handover time, maintain the continuity of data transmission, and improve the user experience; on the other hand, the terminal 12 according to the base station The timing at which the discrete terminal 12 establishes a connection with the base station 11 is randomly established with the base station 11, thereby improving the smoothness of the connection between the terminal 12 and the base station 11.
  • FIG. 10 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station 11 of this embodiment includes a network interface 116, a memory 117, a processor 118, and a bus 119.
  • the network interface 116, the memory 117, and the processor 118 are connected to the bus 119, where:
  • the memory 117 is used to store programs, and the processor 118 is used to call the program to perform the following steps:
  • An indication message is sent to the terminal 12 through the network interface 116, wherein the indication message is used to indicate that the terminal 12 further establishes a connection with the base station 11 through the second channel, the first channel and the second channel, while maintaining the connection with the base station 11 through the first channel.
  • the indication message is used to indicate that the terminal 12 further establishes a connection with the base station 11 through the second channel, the first channel and the second channel, while maintaining the connection with the base station 11 through the first channel.
  • the communication with the terminal 12 is synchronously switched from the first channel to the second channel.
  • the channel switching request further includes a random access timing parameter
  • the program further performs the following steps:
  • Random access timing parameter The timing at which the discrete terminal establishes a connection with the base station 11 through the second channel.
  • the base station 11 may also instruct the terminal 12 to establish a connection directly with the base station 11 through the second channel.
  • the handover command includes a channel switching time, where the channel switching time is used to indicate a handover time of the terminal from the first channel to the second channel.
  • the channel switching time is SFN (System Frame Number, system frame number)
  • the terminal 12 performs channel switching at the boundary of the SFN.
  • the switching module 113 will also perform channel switching at the boundary of the SFN to ensure synchronous switching with the terminal 12.
  • the handover command further includes a channel configuration, where the channel configuration indicates a configuration used by the terminal when using the second channel for data transmission.
  • the channel configuration indicates a configuration used by the terminal when using the second channel for data transmission.
  • the first is that the channel configuration indicates that the terminal 12 communicates with the base station 11 on the second channel using the same configuration as the first channel.
  • the frequency of the first channel and the frequency of the second channel are completely aligned in the time domain, such as the SFN of the first channel and the SFN boundary of the second channel are perfectly aligned.
  • the bandwidths of the first channel and the second channel frequency resource remain unchanged, and the center frequency offsets of the first channel and the second channel are relative values, and the relative value is the frequency difference between the first channel and the second channel.
  • MAC Medium Access Control, media access control configuration, HARQ (Hybrid Automatic Repeat) Request, hybrid automatic repeat request
  • ACK Acknowledge, response
  • NACK Not Acknowledge, the feedback of the negative response is still in the original time domain feedback, and the frequency of its feedback plus the difference from the frequency of the first channel.
  • the second type is that the channel configuration is used to indicate that the terminal 12 maintains the first channel until the buffered data on the first channel is transmitted and received, and communicates with the base station 11 on the second channel using a configuration different from the first channel.
  • the frequency of the first channel and the frequency of the second channel are indicated to be fully aligned in the time domain, such as the SFN of the first channel and the SFN boundary of the second channel are fully aligned.
  • Terminal 12 uses a different configuration than the first channel on the second channel.
  • the above configuration includes at least one of the following information: information frequency, bandwidth, physical layer, and MAC layer configuration.
  • the above configuration can be either the default configuration or a different configuration in advance.
  • the terminal 12 is instructed to transmit new data on the second channel, the communication connection with the first channel is maintained until the buffer data before the channel switching on the first channel is transmitted and received.
  • the base station 11 in this embodiment can perform channel switching in synchronization with the terminal 12, speed up the handover time, maintain the continuity of data transmission, and improve the user experience; on the other hand, the base station 11 discrete terminal The timing of establishing a connection with the base station 11 through the second channel enables the terminal 12 to establish a connection with the base station 11 at random, thereby improving the smoothness of the connection between the terminal 12 and the base station 11.
  • FIG. 11 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • the terminal 12 of this embodiment includes a network interface 126, a memory 127, a processor 128, and a bus 129.
  • the network interface 126, the memory 127, and the processor 128 are connected to the bus 129.
  • the memory 127 is used to store the program.
  • the processor 128 is used to call the program to perform the following steps:
  • Channels have different frequencies;
  • the communication with the base station 11 is switched from the first channel to the second channel.
  • the indication message further includes a random access timing parameter, and the random access timing parameter is used for the timing at which the discrete terminal 12 randomly establishes a connection with the base station 11 by using the second channel, and the program further performs the following steps:
  • the terminal 12 is instructed to establish a connection with the base station 11 via the second channel according to the timing of randomly establishing a connection with the base station 11.
  • the base station 11 may also instruct the terminal 12 to establish a connection directly with the base station 11 through the second channel.
  • the handover command includes a channel switching time
  • the channel switching time is used to indicate a handover time of the terminal 12 from the first channel to the second channel.
  • the channel switching time is SFN (System Frame Number, system frame number)
  • the terminal 12 performs channel switching at the boundary of the SFN.
  • the switching module 113 will also perform channel switching at the boundary of the SFN to ensure synchronous switching with the terminal 12.
  • the handover command further includes a channel configuration, where the channel configuration is used to indicate a configuration used by the terminal 12 when using the second channel for data transmission.
  • the channel configuration is used to indicate a configuration used by the terminal 12 when using the second channel for data transmission.
  • the first is that the channel configuration indicates that the terminal 12 communicates with the base station 11 on the second channel using the same configuration as the first channel.
  • the frequency of the first channel and the frequency of the second channel are completely aligned in the time domain, such as the SFN of the first channel and the SFN boundary of the second channel are completely aligned.
  • the bandwidths of the first channel and the second channel frequency resource remain unchanged, and the center frequency offsets of the first channel and the second channel are relative values, and the relative value is the frequency difference between the first channel and the second channel.
  • MAC Medium Access Control, media access control configuration, HARQ (Hybrid Automatic Repeat) Request, hybrid automatic repeat request) cache and configuration remain unchanged; ACK (Acknowledge, response) / NACK (Not Acknowledge, the feedback of the negative response is still in the original time domain feedback, and the frequency of its feedback plus the difference from the frequency of the first channel.
  • the second type is that the channel configuration indicates that the terminal 12 maintains the first channel until the buffered data on the first channel is transmitted and received, and communicates with the base station 11 on the second channel using a configuration different from that of the first channel.
  • the frequency of the first channel and the frequency of the second channel are indicated to be fully aligned in the time domain, such as the SFN of the first channel and the SFN boundary of the second channel are fully aligned.
  • Terminal 12 uses a different configuration than the first channel on the second channel.
  • the above configuration includes at least one of the following information: information frequency, bandwidth, physical layer, and MAC layer configuration.
  • the above configuration can be either the default configuration or a different configuration in advance.
  • the terminal 12 is instructed to transmit new data on the second channel, the communication connection with the first channel is maintained until the buffer data before the channel switching on the first channel is transmitted and received.
  • the base station 11 in this embodiment can perform channel switching in synchronization with the terminal 12, speed up the handover time, maintain the continuity of data transmission, and improve the user experience; on the other hand, the terminal 12 according to the base station The timing at which the discrete terminal 12 establishes a connection with the base station 11 is randomly established with the base station 11, thereby improving the smoothness of the connection between the terminal 12 and the base station 11.
  • the disclosed apparatus and method may be implemented in other manners.
  • the foregoing embodiment of the device embodiment is merely illustrative.
  • the division of the module or unit is only a logical function division, and the actual implementation may have another division manner, such as multiple units or Components can be combined or integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present embodiment.
  • each functional unit in the embodiments of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods described in the various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read only memory (ROM, Read-Only) Memory, random access memory (RAM), disk or optical disk, and other media that can store program code.
  • the embodiment of the present invention further provides a handover method of the base station 11 and a handover method of the terminal 12 based on the foregoing base station 11 and terminal 12.
  • FIG. 12 is a flowchart of a handover method provided by the base station 11 according to the foregoing embodiment of the present invention, where the method includes the following steps:
  • the base station 11 sends an indication message to the terminal 12, wherein the indication message is used to indicate that the terminal 12 further establishes a connection with the base station 11 through the second channel, the first channel and the second channel, while maintaining the connection with the base station 11 through the first channel.
  • the indication message is used to indicate that the terminal 12 further establishes a connection with the base station 11 through the second channel, the first channel and the second channel, while maintaining the connection with the base station 11 through the first channel.
  • the base station 11 specifically sends an indication message to the terminal 12 through the first channel or the primary cell.
  • the base station 11 receives the access message sent by the terminal 12 through the first channel, where the access message is used to indicate that the terminal 12 has established a connection with the base station 11 through the second channel.
  • the base station 11 sends a handover command to the terminal 12, wherein the handover command is used to instruct the terminal 12 to switch communication with the base station 11 from the first channel to the second channel.
  • the base station 11 specifically sends a handover command to the terminal 12 through the first channel or the primary cell.
  • S4 The base station 11 switches the communication with the terminal 12 from the first channel to the second channel.
  • the indication message further includes a random access timing parameter, and the random access timing parameter is used for the timing at which the discrete terminal 12 randomly establishes a connection with the base station 11 through the second channel.
  • the random access timing parameter is used for the timing at which the discrete terminal 12 randomly establishes a connection with the base station 11 through the second channel.
  • the base station 11 may also instruct the terminal 12 to establish a connection directly with the base station 11 through the second channel.
  • the handover command includes a channel switching time, where the channel switching time is used to indicate a handover time of the terminal from the first channel to the second channel.
  • the channel switching time is SFN (System Frame Number, system frame number)
  • the terminal 12 performs channel switching at the boundary of the SFN.
  • the switching module 113 will also perform channel switching at the boundary of the SFN to ensure synchronous switching with the terminal 12.
  • the handover command further includes a channel configuration, where the channel configuration is used to indicate a configuration used by the terminal when using the second channel for data transmission.
  • the channel configuration includes two types:
  • the first is that the channel configuration indicates that the terminal 12 communicates with the base station 11 on the second channel using the same configuration as the first channel.
  • the frequency of the first channel and the frequency of the second channel are completely aligned in the time domain, such as the SFN of the first channel and the SFN boundary of the second channel are perfectly aligned.
  • the bandwidths of the first channel and the second channel frequency resource remain unchanged, and the center frequency offsets of the first channel and the second channel are relative values, and the relative value is the frequency difference between the first channel and the second channel.
  • MAC Medium Access Control, media access control configuration, HARQ (Hybrid Automatic Repeat) Request, hybrid automatic repeat request
  • ACK Acknowledge, response
  • NACK Not Acknowledge, the feedback of the negative response is still in the original time domain feedback, and the frequency of its feedback plus the difference from the frequency of the first channel.
  • the second type is that the channel configuration indicates that the terminal 12 maintains the first channel until the buffered data on the first channel is transmitted and received, and communicates with the base station 11 on the second channel using a configuration different from that of the first channel.
  • the frequency of the first channel and the frequency of the second channel are indicated to be fully aligned in the time domain, such as the SFN of the first channel and the SFN boundary of the second channel are fully aligned.
  • Terminal 12 uses a different configuration than the first channel on the second channel.
  • the above configuration includes at least one of the following information: information frequency, bandwidth, physical layer, and MAC layer configuration.
  • the above configuration can be either the default configuration or a different configuration in advance.
  • the terminal 12 is instructed to transmit new data on the second channel, the communication connection with the first channel is maintained until the buffer data before the channel switching on the first channel is transmitted and received.
  • sending the handover command to the terminal by using the first channel includes:
  • a channel switching command is sent to the terminal in the form of a physical layer message.
  • the base station 11 in this embodiment can perform channel switching in synchronization with the terminal 12, speed up the handover time, maintain the continuity of data transmission, and improve the user experience; on the other hand, the base station 11 discrete terminal The timing of establishing a connection with the base station 11 through the second channel enables the terminal 12 to establish a connection with the base station 11 at random, thereby improving the smoothness of the connection between the terminal 12 and the base station 11.
  • FIG. 13 is a flowchart of a handover method provided by the terminal 12 according to the foregoing embodiment of the present invention, where the method includes the following steps:
  • the terminal 12 receives the indication message sent by the base station 11, where the indication message is used to indicate that the terminal 12 establishes a connection with the base station 11 through the second channel, the first channel and the second, while maintaining the connection with the base station 11 through the first channel.
  • the channels have different frequencies.
  • S20 The terminal 12 establishes a connection with the base station 11 through the second channel.
  • the terminal 12 sends an access message to the base station 11 through the first channel, where the access message indicates that the terminal 12 has established a connection with the base station 11 through the second channel.
  • the terminal 12 receives the handover command sent by the base station 11, wherein the handover command instructs the base station 11 to switch the communication with the terminal 12 from the first channel to the second channel.
  • S50 The terminal 12 switches the communication with the base station 11 from the first channel to the second channel.
  • the indication message further includes a random access timing parameter, where the random access timing parameter is used for the time when the discrete terminal randomly establishes a connection with the base station 11 by using the second channel, therefore, the step S20 further includes: the terminal 12 according to the second channel according to the second channel A connection is established with the base station 11 at a timing when the base station 11 is randomly established.
  • the process of establishing a connection between the specific terminal 12 and the base station 11 is as described above, and details are not described herein again.
  • the base station 11 may also instruct the terminal 12 to establish a connection directly with the base station 11 through the second channel.
  • the handover command includes a channel switching time, where the channel switching time is used to indicate a handover time of the base station from the first channel to the second channel.
  • the channel switching time is SFN (System Frame Number, system frame number)
  • the terminal 12 performs channel switching at the boundary of the SFN.
  • the switching module 113 will also perform channel switching at the boundary of the SFN to ensure synchronous switching with the terminal 12.
  • the handover command further includes a channel configuration, and the channel configuration indicates a configuration used by the terminal 12 when using the second channel for data transmission.
  • the channel configuration includes two types;
  • the first is that the channel configuration indicates that the terminal 12 communicates with the base station 11 on the second channel using the same configuration as the first channel.
  • the frequency of the first channel and the frequency of the second channel are completely aligned in the time domain, such as the SFN of the first channel and the SFN boundary of the second channel are perfectly aligned.
  • the bandwidths of the first channel and the second channel frequency resource remain unchanged, and the center frequency offsets of the first channel and the second channel are relative values, and the relative value is the frequency difference between the first channel and the second channel.
  • MAC Medium Access Control, media access control configuration, HARQ (Hybrid Automatic Repeat) Request, hybrid automatic repeat request
  • ACK Acknowledge, response
  • NACK Not Acknowledge, the feedback of the negative response is still in the original time domain feedback, and the frequency of its feedback plus the difference from the frequency of the first channel.
  • the second type is that the channel configuration indicates that the terminal 12 maintains the first channel until the buffered data on the first channel is transmitted and received, and communicates with the base station 11 on the second channel using a configuration different from that of the first channel.
  • the frequency of the first channel and the frequency of the second channel are indicated to be fully aligned in the time domain, such as the SFN of the first channel and the SFN boundary of the second channel are fully aligned.
  • Terminal 12 uses a different configuration than the first channel on the second channel.
  • the above configuration includes at least one of the following information: information frequency, bandwidth, physical layer, and MAC layer configuration.
  • the above configuration can be either the default configuration or a different configuration in advance.
  • the terminal 12 is instructed to transmit new data on the second channel, the communication connection with the first channel is maintained until the buffer data before the channel switching on the first channel is transmitted and received.
  • the process of the communication between the terminal 12 and the base station 11 is synchronously switched from the first channel to the second channel according to the channel switching time and the channel configuration, as described above, and details are not described herein again.
  • the base station 11 of the present invention can perform channel switching in synchronization with the terminal 12, speed up the handover time, maintain the continuity of data transmission, and improve the user experience; on the other hand, the base station 11 discrete terminal 12 passes the second channel.
  • the connection with the base station 11 is established, the terminal 12 and the base station 11 are randomly established to establish a connection, thereby improving the smoothness of the connection between the terminal 12 and the base station 11.

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Abstract

本发明公开了一种基站、终端及切换方法。其中，基站包括：发送模块，用于向终端发送指示消息，其中指示消息用于指示终端在通过第一信道与基站保持连接的情况下进一步通过第二信道与基站建立连接；接收模块，用于通过第一信道接收终端发送的接入消息；发送模块还用于发送切换命令至终端，其中切换命令用于指示终端将与基站的通信从第一信道切换到第二信道；切换模块，用于将与终端的通信从第一信道切换到第二信道。通过上述方式，本发明能使基站和终端同步进行信道的切换，加快了切换的时间，并保持了数据传输的连续性，提高用户体验。

Description

基站、终端及切换方法
【技术领域】
本发明涉及通信技术领域，特别是涉及一种基站、终端及切换方法。
【背景技术】
随着分组业务和智能终端的迅速发展，高速、大数据量业务对频谱的需求不断增加。根据最新发布的FCC国际频谱白皮书，非授权或免许可频谱（unlicensed spectrum）资源要大于授权频谱资源。非授权频谱包括用于工业、科学和医疗（ISM，Industrial、scientific and medical）等设备的频段，如在美国有三个频段902-928 MHz、2400-2484.5 MHz及5725-5850 MHz，其中，2.4 GHz为各国共同的ISM频段。
其中，第三代合作伙伴项目（3GPP，the 3rd generation partnership project）长期演进系统（LTE，long term evolution）因其可有效利用非授权频谱资源，提高LTE用户的可用频谱带宽，因此，有人建议将LTE广泛应用在非授权频谱。除了利用ISM频段，LTE也可以按照授权共享接入（ASA，authorized shared access；或LSA，licensed shared access）的方式共享授权频段，如使用电视白频谱（TVWS，television white space），这种情况下，授权用户的优先级高于次级用户，即共享授权频段的非授权用户。
在应用中，LTE需要检测是否有雷达等设备在使用非授权频谱，一旦检测到有雷达等设备在使用非授权频谱，LTE需要停止在该非授权频谱上发送信息，并切换至可用的非授权频谱。由于雷达等设备的信号可能是随机的和动态的，所以非授权频谱间的切换也需要是动态的。
现有的频谱间的切换是静态或者半静态的，无法满足LTE动态切换的需求，并且在切换过程中会造成用户数据的中断，影响用户的体验。
【发明内容】
有鉴于此，本发明实施例提供了一种基站、终端及切换方法，能够进行动态切换。
第一方面提供一种基站，基站包括：发送模块，用于向终端发送指示消息，其中指示消息用于指示终端在通过第一信道与基站保持连接的情况下进一步通过第二信道与基站建立连接，第一信道和第二信道具有不同的频率；接收模块，用于通过第一信道接收终端发送的接入消息，接入消息指示终端已通过第二信道与基站建立连接；发送模块还用于发送切换命令至终端，切换命令指示终端将与基站的通信从第一信道切换到第二信道；切换模块，用于将与终端的通信从第一信道切换到第二信道。
在第一方面的第一种可能的实现方式中，指示消息还包括随机接入时机参数，基站进一步包括离散模块，用于利用随机接入时机参数离散终端通过第二信道与基站随机建立连接的时机。
在第一方面的第二种可能的实现方式中，切换命令还包括信道切换时间，信道切换时间用于指示终端从第一信道到第二信道的切换时间。
结合第一方面或第一方面的第二种可能的实现方式，在第三种可能的实现方式中，切换命令还包括信道配置，信道配置指示终端在使用第二信道进行数据传输时所使用的配置。
结合第一方面的第三种可能的实现方式，在第四种可能的实现方式中，信道配置指示终端在第二信道上使用与第一信道相同的配置与基站通信，其中，相同的配置指第一信道和第二信道的频率资源的带宽保持不变，且第一信道和第二信道的中心频点偏移相对值，相对值为第一信道与第二信道的频率差值。
结合第一方面的第三种可能的实现方式，在第五种可能的实现方式中，信道配置指示终端保持第一信道直至第一信道上的缓存数据收发完毕，并在第二信道上使用与第一信道不同的配置与基站通信。
第二方面提供一种终端，终端包括：接收模块，用于接收基站发送的指示消息，指示消息用于指示终端在通过第一信道与基站保持连接的情况下进一步通过第二信道与基站建立连接，第一信道和第二信道具有不同的频率；连接模块，用于通过第二信道与基站建立连接；发送模块，用于通过第一信道向基站发送接入消息，接入消息指示终端已通过第二信道与基站建立连接；接收模块还用于接收基站发送的切换命令，切换命令指示终端将与基站的通信从第一信道切换到第二信道；切换模块，用于将与基站的通信从第一信道切换到第二信道。
在第二方面的第一种可能的实现方式中，指示消息还包括随机接入时机参数，随机接入时机参数用于离散终端通过第二信道与基站随机建立连接的时机，连接模块还用于终端通过第二信道根据与基站随机建立连接的时机与基站建立连接。
在第二方面的第二种可能的实现方式中，切换命令还包括信道切换时间，信道切换时间用于指示终端从第一信道到第二信道的切换时间。
结合第二方面或第二方面的第二种可能的实现方式，在第三种可能的实现方式中，切换命令还包括信道配置，信道配置指示终端在使用第二信道进行数据传输时所使用的配置。
结合第二方面的第三种可能的实现方式，在第四种可能的实现方式中，信道配置指示终端在第二信道上使用与第一信道相同的配置与基站通信，其中，相同的配置指第一信道和第二信道的频率资源的带宽保持不变，且第一信道和第二信道的中心频点偏移相对值，相对值为第一信道与第二信道的频率差值。
结合第二方面的第三种可能的实现方式，在第五种可能的实现方式中，信道配置指示终端保持第一信道直至第一信道上的缓存数据收发完毕，并在第二信道上使用与第一信道不同的配置与基站通信。
第三方面提供一种基站，基站包括网络接口、存储器、处理器以及总线，网络接口、存储器以及处理器与总线连接，其中：存储器用于存储程序，处理器用于调用程序进行以下步骤：通过网络接口向终端发送指示消息，指示消息用于指示终端在通过第一信道与基站保持连接的情况下进一步通过第二信道与基站建立连接，第一信道和第二信道具有不同的频率；通过第一信道接收终端发送的接入消息，接入消息指示终端已通过第二信道与基站建立连接；通过网络接口发送切换命令至终端，切换命令指示终端将与基站的通信从第一信道切换到第二信道；将与终端的通信从第一信道切换到第二信道。
在第三方面的第一种可能的实现方式中，指示消息还包括随机接入时机参数，程序还进行以下步骤：随机接入时机参数离散终端通过第二信道与基站随机建立连接的时机。
在第三方面的第二种可能的实现方式中，切换命令还包括信道切换时间，信道切换时间用于指示终端从第一信道到第二信道的切换时间。
结合第三方面或第三方面的第二种可能的实现方式，在第三种可能的实现方式中，切换命令还包括信道配置，信道配置指示终端在使用第二信道进行数据传输时所使用的配置。
结合第三方面的第三种可能的实现方式，在第四种可能的实现方式中，信道配置指示终端在第二信道上使用与第一信道相同的配置与基站通信，其中，相同的配置指第一信道和第二信道的频率资源的带宽保持不变，且第一信道和第二信道的中心频点偏移相对值，相对值为第一信道与第二信道的频率差值。
结合第三方面的第三种可能的实现方式，在第五种可能的实现方式中，信道配置指示终端保持第一信道直至第一信道上的缓存数据收发完毕，并在第二信道上使用与第一信道不同的配置与基站通信。
第四方面提供一种终端，终端包括网络接口、存储器、处理器以及总线，网络接口、存储器以及处理器与总线连接，其中：存储器用于存储程序，处理器用于调用程序进行以下步骤：通过网络接口接收基站发送的指示消息，指示消息用于指示终端在通过第一信道与基站保持连接的情况下进一步通过第二信道与基站建立连接，第一信道和第二信道具有不同的频率；通过第二信道与基站建立连接；通过第一信道向基站发送接入消息，接入消息指示终端已通过第二信道与基站建立连接；通过网络接口进一步接收基站发送的切换命令，切换命令指示终端将与基站的通信从第一信道切换到第二信道；将与基站的通信从第一信道切换到第二信道。
在第四方面的第一种可能的实现方式中，指示消息还包括随机接入时机参数，随机接入时机参数用于离散终端通过第二信道与基站随机建立连接的时机，程序进一步进行以下步骤：指示终端通过第二信道根据与基站随机建立连接的时机与基站建立连接。
在第四方面的第二种可能的实现方式中，切换命令还包括信道切换时间，信道切换时间用于指示终端从第一信道到第二信道的切换时间。
结合第四方面或第四方面的第二种可能的实现方式中，在第三种可能的实现方式中，切换命令还包括信道配置，信道配置指示终端在使用第二信道进行数据传输时所使用的配置。
结合第四方面的第三种可能的实现方式中，在第四种可能的实现方式中，信道配置指示终端在第二信道上使用与第一信道相同的配置与基站通信，其中，相同的配置指第一信道和第二信道的频率资源的带宽保持不变，且第一信道和第二信道的中心频点偏移相对值，相对值为第一信道与第二信道的频率差值。
结合第四方面的第三种可能的实现方式中，在第五种可能的实现方式中，信道配置指示终端保持第一信道直至第一信道上的缓存数据收发完毕，并在第二信道上使用与第一信道不同的配置与基站通信。
第五方面提供一种切换方法，方法包括以下步骤：基站向终端发送指示消息，指示消息用于指示终端在通过第一信道与基站保持连接的情况下进一步通过第二信道与基站建立连接，第一信道和第二信道具有不同的频率；基站通过第一信道接收终端发送的接入消息，接入消息指示终端已通过第二信道与基站建立连接；基站发送切换命令至终端，切换命令指示终端将与基站的通信从第一信道切换到第二信道；基站将与终端的通信从第一信道切换到第二信道。
在第五方面的第一种可能的实现方式中，基站包括主小区和辅小区，其中，辅小区包括第一信道和第二信道：
基站向终端发送指示消息的步骤包括：基站通过第一信道或主小区向终端发送指示消息；
基站发送切换命令至终端的步骤进一步包括：基站通过第一信道或主小区发送切换命令至终端。
结合第五方面的第一种可能的实现方式，在第二中可能的实现方式中，指示消息还包括随机接入时机参数，随机接入时机参数用于离散终端通过第二信道与基站随机建立连接的时机。
结合第五方面的第一种可能的实现方式，在第五方面的第三种可能的实现方式中，切换命令还包括信道切换时间，信道切换时间用于指示终端从第一信道到第二信道的切换时间。
结合第五方面的第一或第三种可能的实现方式，在第四种可能的实现方式中，切换命令还包括信道配置，信道配置指示终端在使用第二信道进行数据传输时所使用的配置。
结合第五方面的第四种可能的实现方式中，在第五种可能的实现方式中，信道配置指示终端在第二信道上使用与第一信道相同的配置与基站通信，其中，相同的配置指第一信道和第二信道的频率资源的带宽保持不变，且第一信道与第二信道的中心频点偏移相对值，相对值为第一信道与第二信道的频率差值。
结合第五方面的第四种可能的实现方式中，在第六种可能的实现方式中，信道配置指示终端保持第一信道直至第一信道上的缓存数据收发完毕，并在第二信道上使用与第一信道不同的配置与基站通信。
第六方面提供一种切换方法，方法包括以下步骤：终端接收基站发送的指示消息，指示消息用于指示终端在通过第一信道与基站保持连接的情况下进一步通过第二信道与基站建立连接，第一信道和第二信道具有不同的频率；终端通过第二信道与基站建立连接；终端通过第一信道向基站发送接入消息，接入消息指示终端已通过第二信道与基站建立连接；终端接收基站发送的切换命令，切换命令指示终端将与基站的通信从第一信道切换到第二信道；终端将与基站的通信从第一信道切换到第二信道。
在第六方面的第一种可能的实现方式中，指示消息还包括随机接入时机参数，随机接入时机参数用于离散终端通过第二信道与基站随机建立连接的时机，终端通过第二信道与基站建立连接进一步包括：终端通过第二信道根据与基站随机建立连接的时机与基站建立连接。
在第六方面的第二种可能的实现方式中，切换命令还包括信道切换时间，信道切换时间用于指示终端从第一信道到第二信道的切换时间。
结合第六方面或第六方面第二种可能的实现方式，在第三种可能的实现方式中，切换命令还包括信道配置，信道配置指示终端在使用第二信道进行数据传输时所使用的配置。
结合第六方面的第三种可能的实现方式，在第四种可能的实现方式中，信道配置指示终端在第二信道上使用与第一信道相同的配置与基站通信，其中，相同的配置指第一信道和第二信道的频率资源的带宽保持不变，且第一信道和第二信道的中心频点偏移相对值，相对值为第一信道与第二信道的频率差值。
结合第六方面的第三种可能的实现方式，在第五种可能的实现方式中，信道配置指示终端保持第一信道直至第一信道上的缓存数据收发完毕，并在第二信道上使用与第一信道不同的配置与基站通信。
通过上述技术方案，本发明实施例提供了一种基站，基站在通过第一信道接收终端发送的终端已通过第二信道与基站建立连接的接入消息的情况下，进一步发送切换命令至终端，指示终端与基站的通信从第一信道切换到第二信道并将与终端的通信从第一信道切换到第二信道。因此，本发明能使基站和终端进行动态信道切换，提高切换时间，保持数据传输的连续性，提高用户体验。
【附图说明】
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例提供的一种切换系统进行信道切换时的工作示意图；
图2是本发明实施例提供的一种基站的结构示意图；
图3是本发明根据第一种信道配置，基站与终端的通信从第一信道同步切换到第二信道的过程；
图4是本发明根据第一种信道配置，基站与终端的通信从第一信道同步切换到第二信道的另一过程；
图5是本发明根据第二种信道配置，基站与终端的通信从第一信道同步切换到第二信道的过程；
图6是本发明根据第二种信道配置，基站与终端的通信从第一信道同步切换到第二信道的另一过程；
图7是本发明实施例提供的一种终端的结构示意图；
图8是终端与基站随机建立连接的方式为竞争式时的原理图；
图9是终端与基站随机建立连接的方式为非竞争式时的原理图；
图10是本发明实施例提供的一种基站的另一结构示意图；
图11是本发明实施例提供的一种终端的另一结构示意图；
图12是本发明实施例提供的一种切换方法的流程图；
图13是本发明实施例提供的一种切换方法另一流程图。
【具体实施方式】
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
首先请参阅图1，图1是本发明实施例提供的一种切换系统进行信道切换时的工作示意图。如图1所示，本发明实施例的切换系统10包括基站11和终端12。
基站11通过移动通信交换中心，实时的与终端12进行信息传递。当终端12与基站11通信的信道因为雷达等设备的干扰或者由于节能原因需要关闭时，基站11和终端12都需要进行信道的切换，以保持通信的质量。在本实施例中，信道切换可以理解成基站与终端的通信从一个频率调整到另一个频率。
具体而言，以载波聚合技术为例，基站11包含主小区和辅小区，假设基站11工作在辅小区的第一信道，基站11需要将辅小区的工作信道从第一信道切换至第二信道。基站11首先通过主小区发送指示消息给终端12，指示终端12通过第一信道（即频率1所在的信道）与基站11保持通信，并通过第二信道与基站11建立连接。终端12通过第二信道与基站11建立连接后通过第一信道发送成功建立连接的消息给基站11。基站11进一步通过主小区发送切换命令给终端12。指示终端12和基站11的通信从第一信道切换到第二信道。
在本实施例中，上述切换命令进一步指示终端从第一信道到第二信道的切换与基站从第一信道到第二信道的切换保持同步，以便保证辅小区在任一时刻均有信道与终端保持通信，提高了用户的体验。
值得注意的是，基站11还可以通过辅小区的第一信道发送指示消息和切换命令给终端12。
因此，本实施例的切换系统10的基站11和终端12可同步进行信道的切换，加快了切换的时间，并保持了数据传输的连续性，提高用户体验。
以下将具体介绍前文实施例的基站11和终端12的具体结构及工作原理。
请参阅图2，图2是本发明实施例提供的一种基站的结构示意图。如图2所示，本实施例的基站11包括发送模块110、接收模块111以及切换模块113。
其中，发送模块110用于向终端12发送指示消息，其中指示消息用于指示终端12在通过第一信道与基站11保持连接的情况下进一步通过第二信道与基站11建立连接，第一信道和第二信道具有不同的频率。其中，如前文所述，发送模块110具体是通过第一信道或主小区向终端12发送指示消息。
接收模块111用于通过第一信道接收终端12发送的接入消息，其中接入消息用于指示终端12已通过第二信道与基站11建立连接。
发送模块110还用于发送切换命令至终端12，其中切换命令指示终端12将与基站11的通信从第一信道切换到第二信道。其中，如前文所述，发送模块110具体是通过第一信道或主小区发送切换命令至终端12。
切换模块113用于将与终端12的通信从第一信道切换到第二信道。
因此，本实施例的基站11可与终端12同步进行信道的切换，加快了切换的时间，并保持了数据传输的连续性，提高用户体验。
可选的，基站11还包括指示消息产生模块114，指示消息产生模块114用于判断正在服务的第一信道是否受到干扰，例如雷达信号干扰等。并当干扰信号的强度大于或等于预设的干扰检测门限值时产生指示消息。
指示消息产生模块114还可以用于在第一信道由于节能等原因需要关闭的情况下产生指示消息。
可选的，指示消息中包括了第二信道的频率。其中第二信道的频率有多种表现方式，例如绝对频率、逻辑值（Absolute Radio Frequency Channel Number ，ARFCN）以及与第一信道的频率（即前文的频率1）的偏移量。
其中，当第二频率的表现形式为逻辑值或者与第一信道的频率的偏移量时，都可以根据该逻辑值或者该第一信道的频率以及其偏移量来计算得到绝对频率。
进一步的，指示消息还包括随机接入时机参数。指示消息产生模块114进一步包括离散模块115，用于利用该随机接入时机参数离散终端12通过第二信道与基站11随机建立连接的时机。
本实施例中，第二信道可为授权信道，也可为非授权信道。
当第二信道为非授权信道时，使用的用户非常多，从而很容易导致终端12通过第二信道与基站11建立连接时产生堵塞。为了尽量避免产生堵塞的现象，本实施例的基站11指示终端12通过第二信道与基站11随机建立连接。具体而言，需要随机接入时机参数离散终端12通过第二信道与基站11建立连接的时机，即在终端12可通过第二信道与基站11建立连接的时间内产生一个随机时机，终端12根据该随机时机与基站11建立连接，从而避免了所有终端都在同一个时机与基站11建立连接。
例如，基站11下发建立连接的时间是10ms(目前LTE中1个子帧为1ms，)，则终端12可随机衍生0-9的随机数（即前文的随机时机），如果衍生的随机数是5，则指示终端12在接收到指示消息后第5个子帧通过第二信道与基站11建立连接。
其中，终端12与基站11随机建立连接的方式包括竞争式和非竞争式两种。
其中，在其他可选实施例中，基站11还可指示终端12通过第二信道与基站11直接建立连接。例如基站11认为终端12不需要通过随机接入流程获取上行发送提前量或者上行发送提前量不需要改变的话，基站11可以指示终端12通过第二信道与基站11直接建立连接。
可选的，接收模块111接收终端12发送的接入消息包括终端12已通过第二信道与基站11随机建立连接或者终端12已通过第二信道与基站11直接建立连接的消息。
可选的，发送模块110发送的切换命令包括信道切换时间，信道切换时间用于指示终端12从第一信道到第二信道的切换时间。例如，信道切换时间为SFN（System Frame Number，系统帧号），则终端12在SFN的边界进行信道切换。其中，切换模块113也将在SFN的边界进行信道切换，以保证与终端12进行同步切换。
可选的，切换命令进一步包括信道配置，信道配置指示终端12在使用第二信道进行数据传输时所使用的配置。
其中，终端12在第二信道进行数据传输时所使用的信道配置可包括两种：
第一种信道配置为：终端12在第二信道上使用与第一信道相同的配置与基站11通信。
具体而言，第一信道的频率和第二信道的频率在时域上要完全对齐，如第一信道的SFN和第二信道的SFN边界完全对齐。第一信道和第二信道的频率资源的带宽保持不变，且第一信道和第二信道的中心频点偏移相对值，相对值为第一信道与第二信道的频率差值。如：MAC（ Medium Access Control，媒体接入控制）的配置、HARQ（Hybrid Automatic Repeat Request，混合自动重传请求）的缓存和配置保持不变；ACK（Acknowledge，应答）/NACK（Not Acknowledge，否定应答）的反馈还是在原有的时域反馈，而其反馈的频率加上和第一信道的频率的差值。
具体的基站11与终端12的通信从第一信道同步切换到第二信道的过程如图3和图4所示，首先请参阅图3，图3是针对HARQ处理，如图3所示，基站11在第1个子帧通过第一信道发送UL Grant（上行命令）给终端12，指示终端12在第4个子帧根据该UL Grant通过第一信道发送UL Data（上行数据）给基站11。假设终端12将在第5个子帧发生信道切换，开始在第二信道传输数据，同时终端12关闭第一信道。此时，基站11同样在第5个子帧发生信道切换，开始在第二信道传输数据，同时基站11同样关闭第一信道。但基站11原本在第一信道的第8个子帧进行反馈的上行数据反馈ACK/NACK在信道切换后，在第二信道的第8个子帧进行反馈，使用相同的时域资源，频率的中心值偏移相对值，该相对值为第一信道与第二信道的频率差值。
请再参阅图4，图4是针对UL数据处理。如图4所示，终端12在第4个子帧接收到UL Grant，终端12在第8个子帧上根据该UL Grant通过第一信道发送UL数据到基站11，假设终端12在第5个子帧发生信道切换，同时终端12关闭第一信道，此时终端在第8个子帧根据该UL Grant通过第二信道发送UL数据到基站11。由此实现基站11和终端12同步进行信道切换。
其中，UL Grant资源分配方式有两种：例如20MHz小区，一个子帧内频域上可以分为100等分可用的物理资源块(Physical Resource Block, PRB)，即从0…99编号。
第一种资源分配方式为：频域上由起始地址和长度组成,可以指示上行物理资源块的起始位置和长度。
第二种资源分配方式为：频域上由具体位置形成，该类型可指示上行物理资源快的具体位置。
根据前文所述，终端12与基站11通信的信道需要从第一信道切换到第二信道，产生了频率的偏移，终端12需要按照上述的方式重新计算UL Grant的具体位置。
以上介绍的是终端12在第二信道进行数据传输时所使用的第一种信道配置，以下将介绍第二种信道配置：
终端12保持与第一信道的通信连接直至第一信道上的缓存数据收发完毕，并在第二信道上使用与第一信道不同的配置与基站11通信。
具体而言，指示终端12在第一信道的频率和第二信道的频率在时域上要完全对齐，如第一信道的SFN和第二信道的SFN边界完全对齐。终端12在第二信道上使用与第一信道不同的配置。上述配置至少包括下述一种信息：信息频点、带宽、物理层以及MAC层配置等。上述配置可以为默认配置，也可以为预先进行的不同配置。并且进一步的，指示终端12在第二信道上传输新数据时，保持与第一信道的通信连接直至第一信道上的在信道切换时刻前的缓存数据收发完毕。
采用第二种信道配置的方式举例如下：
具体的基站11与终端12的通信从第一信道同步切换到第二信道的过程请参阅图5和图6，同样以HARQ反馈和UL调度举例进行说明。
首先请参阅图5，基站11在第4个子帧通过第一信道分配UL Grant 1给终端12，在第5个子帧开始信道切换，即通过第二信道分配UL Grant 2给终端12，同时保持与第一信道的通信。此时，终端12同样在第5个子帧开始信道切换，即通过第二信道接收基站11分配的UL Grant2，同时保持与第一信道的通信，即在第8个子帧上按照UL Grant 1通过第一信道发送上行数据，在第9个子帧上按照UL Grant 2通过第二信道发送上行数据。另外，基站11在第13个子帧通过第一信道反馈ACK给终端12后，完成第一信道在切换时刻前相关数据的传递，进而关闭第一信道，同时终端12在收到基站11发送的ACK反馈后，同样关闭第一信道。
请再参阅图6，对于下行数据，需要延后4个子帧做上行HARQ反馈。基站11在第4个子帧通过第一信道调度下行数据，在第5个子帧开始信道切换，即通过第二信道调度下行数据，同时保持与第一信道的通信。同时，终端12在第5个子帧同样进行信道切换，即通过第二信道接收基站11发送的下行数据，同时保持与第一信道的通信，即终端12在第8个子帧通过第一信道进行HARQ反馈，终端在第9个子帧通过第二信道进行HARQ反馈。如果终端12未能成功解析基站11通过第一信道调度的下行数据，如CRC校验失败，则终端12通过第一信道反馈NACK给基站11，基站11根据NACK继续在第11个子帧处重传，终端12继续在第15个子帧进行HRAQ反馈，如果反馈ACK，且并无其他缓存数据，终端12则关闭第一信道。基站11同时也关闭第一信道。
其中，发送模块110发送切换命令的方式有如下几种：
第一种：使用无线资源控制消息的形式发送，可在现有专用消息上扩展或重新定义一个消息。也可以使用系统消息，通过系统消息指示信道配置。
第二种：使用MAC CE（Medium Access Control Control Element媒体接入控制单元）的形式发送，具体为定义一个MAC CE等。
第三种：使用物理层消息的形式发送，如定义一个DCI（Downlink Control Information，下行控制信息）类型，包含在PDCCH(Physical Downlink Control Channel，物理下行控制信道)中，该DCI类型中包含信道切换时间和信道配置。
因此，本实施例中，本实施例的基站11与终端12一方面可以同步进行信道的切换，加快了切换的时间，并保持了数据传输的连续性，提高用户体验；另一方面，基站11离散终端12通过第二信道与基站11建立连接的时机，使得终端12与基站11随机建立连接，由此可提高终端12与基站11建立连接的畅通性。
请参阅图7，图7是本发明实施例提供的一种终端的结构示意图。如图7所示，本实施例的终端12包括接收模块120、连接模块121、发送模块122以及切换模块124。
其中，接收模块120用于接收基站11发送的指示消息，其中指示消息用于指示终端12在通过第一信道与基站11保持连接的情况下进一步通过第二信道与基站11建立连接，第一信道和第二信道具有不同的频率。
连接模块121用于通过第二信道与基站11建立连接。
发送模块122用于通过第一信道发送接入消息，接入消息指示终端12已通过第二信道与基站11建立连接。
接收模块120还用于接收基站11发送的切换命令，其中切换命令用于指示终端12将与基站11的通信从第一信道切换到第二信道。
切换模块124用于根据该切换命令与基站11的通信从第一信道切换到第二信道。
因此，本实施例的终端12和基站11可同步进行信道的切换，加快了切换的时间，并保持了数据传输的连续性，提高用户体验。
可选的，指示消息还包括随机接入时机参数，随机接入时机参数用于离散终端12通过第二信道与基站11随机建立连接的时机。连接模块121还用于终端12通过第二信道根据与基站11随机建立连接的时机与基站11建立连接。
其中，随机接入时机参数离散终端12通过第二信道与基站11随机建立连接的时机如前文所述，在此不再赘述。
其中，终端12与基站11随机建立连接的方式包括竞争式和非竞争式两种。
具体而言，当该建立连接方式为竞争式时，请一并参阅图8，具体包括以下步骤：
步骤1：终端12发送用于同步的随机接入Preamble(前导)给基站11；
步骤2：基站11发送响应反馈信息和可供终端12发送资源请求信息的资源等给终端12；
步骤3：终端12使用基站11分配的资源发送资源请求给基站11；
步骤4：基站11反馈数据发送资源分配给终端12。
如前文举例的指示终端12在接收到指示消息后第5个子帧通过第二信道与基站11建立连接，具体的终端12在第5个子帧执行上述的步骤1。
当建立连接方式为非竞争式时，请一并参阅图9，具体包括以下步骤：
步骤1：基站11给终端12分配随机专用前导（RA Dedicated Preamble）；
步骤2：终端12使用分配的随机专用前导，并将该使用消息发送给基站11；
步骤3：基站11发送响应反馈信息和可供终端12发送资源请求信息的资源等。
其中，对非竞争式的方式，基站11分配的随机专用前导可包含在指示消息中。
其中，在其他可选实施例中，基站11还可指示终端12通过第二信道与基站11直接建立连接。
可选的，发送模块122发送的是在竞争模式中接收到资源分配的信息或者在非竞争模式中接收到基站11发送的响应反馈信息和可供终端12发送资源请求信息的资源等消息或者与基站11直接建立连接时读取到PSS/SSS和/或系统消息等消息给基站11。
可选的，切换命令包括信道切换时间，信道切换时间用于指示终端12从第一信道到第二信道的切换时间。例如，信道切换时间为SFN（System Frame Number，系统帧号），则终端12在SFN的边界进行信道切换。其中，切换模块113也将在SFN的边界进行信道切换，以保证与终端12进行同步切换。
可选的，切换命令进一步包括信道配置，信道配置用于指示终端12在使用第二信道进行数据传输时所使用的配置。
其中，信道配置有两种：
第一种为：信道配置指示终端12在第二信道上使用与第一信道相同的配置与基站11通信。
具体而言，第一信道的频率和第二信道的频率在时域上要完全对齐，如第一信道的SFN和第二信道的SFN边界完全对齐。第一信道和第二信道的频率资源的带宽保持不变，且第一信道和第二信道的中心频点偏移相对值，相对值为第一信道与第二信道的频率差值。如：MAC（ Medium Access Control，媒体接入控制）的配置、HARQ（Hybrid Automatic Repeat Request，混合自动重传请求）的缓存和配置保持不变；ACK（Acknowledge，应答）/NACK（Not Acknowledge，否定应答）的反馈还是在原有的时域反馈，而其反馈的频率加上和第一信道的频率的差值。
第二种为：信道配置指示终端12保持第一信道直至第一信道上的缓存数据收发完毕，并在第二信道上使用与第一信道不同的配置与基站11通信。
具体而言，指示终端12在第一信道的频率和第二信道的频率在时域上要完全对齐，如第一信道的SFN和第二信道的SFN边界完全对齐。终端12在第二信道上使用与第一信道不同的配置。上述配置至少包括下述一种信息：信息频点、带宽、物理层以及MAC层配置等。上述配置可以为默认配置，也可以为预先进行的不同配置。并且进一步的，指示终端12在第二信道上传输新数据时，保持与第一信道的通信连接直至第一信道上的在信道切换时刻前的缓存数据收发完毕。
具体的终端12与基站11的通信根据信道切换时间和信道配置从第一信道切换到第二信道的过程如前文所述，在此不再赘述。
因此，本实施例中，本实施例的基站11可与终端12同步进行信道的切换，加快了切换的时间，并保持了数据传输的连续性，提高用户体验；另一方面，终端12根据基站11离散终端12与基站11建立连接的时机与基站11随机建立连接，由此可提高终端12与基站11建立连接的畅通性。
请参阅图10，图10是本发明实施例提供的一种基站的结构示意图。如图10所示，本实施例的基站11包括网络接口116、存储器117、处理器118以及总线119，网络接口116、存储器117以及处理器118与总线119连接，其中：
存储器117用于存储程序，处理器118用于调用程序进行以下步骤：
通过网络接口116向终端12发送指示消息，其中指示消息用于指示终端12在通过第一信道与基站11保持连接的情况下进一步通过第二信道与基站11建立连接，第一信道和第二信道具有不同的频率；
通过第一信道接收终端12发送的接入消息，其中接入消息用于指示终端12已通过第二信道与基站11建立连接；
通过网络接口116发送切换命令至终端12，其中切换命令用于指示终端12将与基站11的通信从第一信道切换到第二信道；
将与终端12的通信从第一信道同步切换到第二信道。
可选的，信道切换请求进一步包括随机接入时机参数，程序还进行以下步骤：
随机接入时机参数离散终端通过第二信道与基站11建立连接的时机。
其中，具体离散原理如前文所述，在此不再赘述。
其中，在其他可选实施例中，基站11还可指示终端12通过第二信道与基站11直接建立连接。
可选的，切换命令包括信道切换时间，信道切换时间用于指示终端从第一信道到第二信道的切换时间。例如，信道切换时间为SFN（System Frame Number，系统帧号），则终端12在SFN的边界进行信道切换。其中，切换模块113也将在SFN的边界进行信道切换，以保证与终端12进行同步切换。
可选的，切换命令进一步包括信道配置，信道配置指示终端在使用第二信道进行数据传输时所使用的配置。其中，信道配置有两种：
第一种为：信道配置指示终端12在第二信道上使用与第一信道相同的配置与基站11通信。
具体而言，第一信道的频率和第二信道的频率在时域上要完全对齐，如第一信道的SFN和第二信道的SFN边界完全对齐。第一信道和第二信道频率资源的带宽保持不变，且第一信道和第二信道的中心频点偏移相对值，相对值为第一信道与第二信道的频率差值。如：MAC（ Medium Access Control，媒体接入控制）的配置、HARQ（Hybrid Automatic Repeat Request，混合自动重传请求）的缓存和配置保持不变；ACK（Acknowledge，应答）/NACK（Not Acknowledge，否定应答）的反馈还是在原有的时域反馈，而其反馈的频率加上和第一信道的频率的差值。
第二种为：信道配置用于指示终端12保持第一信道直至第一信道上的缓存数据收发完毕，并在第二信道上使用与第一信道不同的配置与基站11通信。
具体而言，指示终端12在第一信道的频率和第二信道的频率在时域上要完全对齐，如第一信道的SFN和第二信道的SFN边界完全对齐。终端12在第二信道上使用与第一信道不同的配置。上述配置至少包括下述一种信息：信息频点、带宽、物理层以及MAC层配置等。上述配置可以为默认配置，也可以为预先进行的不同配置。并且进一步的，指示终端12在第二信道上传输新数据时，保持与第一信道的通信连接直至第一信道上的在信道切换前的缓存数据收发完毕。
具体的终端12与基站11的通信根据信道切换时间和信道配置从第一信道切换到第二信道的过程如前文所述，在此不再赘述。
因此，本实施例中，本实施例的基站11可与终端12同步进行信道的切换，加快了切换的时间，并保持了数据传输的连续性，提高用户体验；另一方面，基站11离散终端12通过第二信道与基站11建立连接的时机，使得终端12与基站11随机建立连接，由此可提高终端12与基站11建立连接的畅通性。
请参阅图11，图11是本发明实施例提供的一种终端的结构示意图。如图11所示，本实施例的终端12包括网络接口126、存储器127、处理器128以及总线129，网络接口126、存储器127以及处理器128与总线129连接，其中：存储器127用于存储程序，处理器128用于调用程序进行以下步骤：
通过网络接口126接收基站11发送的指示消息，其中指示消息用于指示终端12在通过第一信道与基站11保持连接的情况下进一步通过第二信道与基站11建立连接，第一信道和第二信道具有不同的频率；
通过第二信道与基站11建立连接；
通过第一信道向基站11发送接入消息，接入消息指示终端12已通过第二信道与基站11建立连接；
通过网络接口126进一步接收基站11发送的切换命令，其中切换命令用于指示基站11将与终端12的通信从第一信道切换到第二信道；
将与基站11的通信从第一信道切换到第二信道。
可选的，指示消息还包括随机接入时机参数，随机接入时机参数用于离散终端12通过第二信道与基站11随机建立连接的时机，程序进一步进行以下步骤：
指示终端12通过第二信道根据与基站11随机建立连接的时机与基站11建立连接。
其中，具体的终端12与基站11随机建立连接的过程如前文所述，在此不再赘述。
其中，在其他可选实施例中，基站11还可指示终端12通过第二信道与基站11直接建立连接。
可选的，切换命令包括信道切换时间，信道切换时间用于指示终端12从第一信道到第二信道的切换时间。例如，信道切换时间为SFN（System Frame Number，系统帧号），则终端12在SFN的边界进行信道切换。其中，切换模块113也将在SFN的边界进行信道切换，以保证与终端12进行同步切换。
可选的，切换命令进一步包括信道配置，信道配置用于指示终端12在使用第二信道进行数据传输时所使用的配置。其中，信道配置有两种：
第一种为：信道配置指示终端12在第二信道上使用与第一信道相同的配置与基站11通信。
具体而言，具体而言，第一信道的频率和第二信道的频率在时域上要完全对齐，如第一信道的SFN和第二信道的SFN边界完全对齐。第一信道和第二信道频率资源的带宽保持不变，且第一信道和第二信道的中心频点偏移相对值，相对值为第一信道与第二信道的频率差值。如：MAC（ Medium Access Control，媒体接入控制）的配置、HARQ（Hybrid Automatic Repeat Request，混合自动重传请求）的缓存和配置保持不变；ACK（Acknowledge，应答）/NACK（Not Acknowledge，否定应答）的反馈还是在原有的时域反馈，而其反馈的频率加上和第一信道的频率的差值。
第二种为：信道配置指示终端12保持第一信道直至第一信道上的缓存数据收发完毕，并在第二信道上使用与第一信道不同的配置与基站11通信。
具体而言，指示终端12在第一信道的频率和第二信道的频率在时域上要完全对齐，如第一信道的SFN和第二信道的SFN边界完全对齐。终端12在第二信道上使用与第一信道不同的配置。上述配置至少包括下述一种信息：信息频点、带宽、物理层以及MAC层配置等。上述配置可以为默认配置，也可以为预先进行的不同配置。并且进一步的，指示终端12在第二信道上传输新数据时，保持与第一信道的通信连接直至第一信道上的在信道切换前的缓存数据收发完毕。
具体的终端12与基站11的通信根据信道切换时间和信道配置从第一信道切换到第二信道的过程如前文所述，在此不再赘述。
因此，本实施例中，本实施例的基站11可与终端12同步进行信道的切换，加快了切换的时间，并保持了数据传输的连续性，提高用户体验；另一方面，终端12根据基站11离散终端12与基站11建立连接的时机与基站11随机建立连接，由此可提高终端12与基站11建立连接的畅通性。
在本申请所提供的几个实施方式中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例实施方式仅仅是示意性的，例如，所述模块或单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例实施方式方案的目的。
另外，在本申请各个实施例实施方式中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备（可以是个人计算机，服务器，或者网络设备等）或处理器（processor）执行本申请各个实施例实施方式所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器（ROM，Read-Only Memory）、随机存取存储器（RAM，Random Access Memory）、磁碟或者光盘等各种可以存储程序代码的介质。
本发明实施例还基于前文的基站11和终端12分别提供了基站11的切换方法和终端12的切换方法。
首先请参阅图12，图12是本发明实施例基于前文的基站11提供的一种切换方法的流程图，该方法包括以下步骤：
S1：基站11向终端12发送指示消息，其中指示消息用于指示终端12在通过第一信道与基站11保持连接的情况下进一步通过第二信道与基站11建立连接，第一信道和第二信道具有不同的频率。
在本步骤中，如前文所述，基站11具体是通过第一信道或主小区向终端12发送指示消息。
S2：基站11通过第一信道接收终端12发送的接入消息，其中接入消息用于指示终端12已通过第二信道与基站11建立连接。
S3：基站11发送切换命令至终端12，其中切换命令用于指示终端12将与基站11的通信从第一信道切换到第二信道。
在本步骤中，如前文所述，基站11具体是通过第一信道或主小区发送切换命令至终端12。
S4：基站11将与终端12的通信从第一信道切换到第二信道。
可选的，指示消息还包括随机接入时机参数，随机接入时机参数用于离散终端12通过第二信道与基站11随机建立连接的时机。其中，具体离散原理如前文所述，在此不再赘述。
其中，在其他可选实施例中，基站11还可指示终端12通过第二信道与基站11直接建立连接。
可选的，切换命令包括信道切换时间，信道切换时间用于指示终端从第一信道到第二信道的切换时间。例如，信道切换时间为SFN（System Frame Number，系统帧号），则终端12在SFN的边界进行信道切换。其中，切换模块113也将在SFN的边界进行信道切换，以保证与终端12进行同步切换。
可选的，切换命令进一步包括信道配置，信道配置用于指示终端在使用第二信道进行数据传输时所使用的配置。其中，信道配置包括两种：
第一种为:信道配置指示终端12在第二信道上使用与第一信道相同的配置与基站11通信。
具体而言，第一信道的频率和第二信道的频率在时域上要完全对齐，如第一信道的SFN和第二信道的SFN边界完全对齐。第一信道和第二信道频率资源的带宽保持不变，且第一信道和第二信道的中心频点偏移相对值，相对值为第一信道与第二信道的频率差值。如：MAC（ Medium Access Control，媒体接入控制）的配置、HARQ（Hybrid Automatic Repeat Request，混合自动重传请求）的缓存和配置保持不变；ACK（Acknowledge，应答）/NACK（Not Acknowledge，否定应答）的反馈还是在原有的时域反馈，而其反馈的频率加上和第一信道的频率的差值。
第二种为：信道配置指示终端12保持第一信道直至第一信道上的缓存数据收发完毕，并在第二信道上使用与第一信道不同的配置与基站11通信。
具体而言，指示终端12在第一信道的频率和第二信道的频率在时域上要完全对齐，如第一信道的SFN和第二信道的SFN边界完全对齐。终端12在第二信道上使用与第一信道不同的配置。上述配置至少包括下述一种信息：信息频点、带宽、物理层以及MAC层配置等。上述配置可以为默认配置，也可以为预先进行的不同配置。并且进一步的，指示终端12在第二信道上传输新数据时，保持与第一信道的通信连接直至第一信道上的在信道切换前的缓存数据收发完毕。
其中，基站11和终端12的通信从第一信道切换到第二信道的具体过程如前文所述，在此不再赘述。
可选的，通过第一信道发送切换命令至终端包括：
使用无线资源控制消息的形式发送信道切换命令至终端；或者
使用MAC CE的形式发送信道切换命令至终端；或者
使用物理层消息的形式发送信道切换命令至终端。
因此，本实施例中，本实施例的基站11可与终端12同步进行信道的切换，加快了切换的时间，并保持了数据传输的连续性，提高用户体验；另一方面，基站11离散终端12通过第二信道与基站11建立连接的时机，使得终端12与基站11随机建立连接，由此可提高终端12与基站11建立连接的畅通性。
请参阅图13，图13是本发明实施例基于前文的终端12提供的一种切换方法的流程图，该方法包括以下步骤：
S10：终端12接收基站11发送的指示消息，其中指示消息用于指示终端12在通过第一信道与基站11保持连接的情况下进一步通过第二信道与基站11建立连接，第一信道和第二信道具有不同的频率。
S20：终端12通过第二信道与基站11建立连接。
S30：终端12通过第一信道向基站11发送接入消息，其中，接入消息指示终端12已通过第二信道与基站11建立连接。
S40：终端12接收基站11发送的切换命令，其中切换命令指示基站11将与终端12的通信从第一信道切换到第二信道。
S50：终端12将与基站11的通信从第一信道切换到第二信道。
可选的，指示消息还包括随机接入时机参数，随机接入时机参数用于离散终端通过第二信道与基站11随机建立连接的时机，因此，步骤S20进一步包括：终端12通过第二信道根据与基站11随机建立连接的时机与基站11建立连接。其中，具体的终端12与基站11随机建立连接的过程如前文所述，在此不再赘述。
其中，在其他可选实施例中，基站11还可指示终端12通过第二信道与基站11直接建立连接。
可选的，切换命令包括信道切换时间，信道切换时间用于指示基站从第一信道到第二信道的切换时间。例如，信道切换时间为SFN（System Frame Number，系统帧号），则终端12在SFN的边界进行信道切换。其中，切换模块113也将在SFN的边界进行信道切换，以保证与终端12进行同步切换。
可选的，切换命令进一步包括信道配置，信道配置指示终端12在使用第二信道进行数据传输时所使用的配置。其中，信道配置包括两种；
第一种为：信道配置指示终端12在第二信道上使用与第一信道相同的配置与基站11通信。
具体而言，第一信道的频率和第二信道的频率在时域上要完全对齐，如第一信道的SFN和第二信道的SFN边界完全对齐。第一信道和第二信道频率资源的带宽保持不变，且第一信道和第二信道的中心频点偏移相对值，相对值为第一信道与第二信道的频率差值。如：MAC（ Medium Access Control，媒体接入控制）的配置、HARQ（Hybrid Automatic Repeat Request，混合自动重传请求）的缓存和配置保持不变；ACK（Acknowledge，应答）/NACK（Not Acknowledge，否定应答）的反馈还是在原有的时域反馈，而其反馈的频率加上和第一信道的频率的差值。
第二种为：信道配置指示终端12保持第一信道直至第一信道上的缓存数据收发完毕，并在第二信道上使用与第一信道不同的配置与基站11通信。
具体而言，指示终端12在第一信道的频率和第二信道的频率在时域上要完全对齐，如第一信道的SFN和第二信道的SFN边界完全对齐。终端12在第二信道上使用与第一信道不同的配置。上述配置至少包括下述一种信息：信息频点、带宽、物理层以及MAC层配置等。上述配置可以为默认配置，也可以为预先进行的不同配置。并且进一步的，指示终端12在第二信道上传输新数据时，保持与第一信道的通信连接直至第一信道上的在信道切换前的缓存数据收发完毕。
其中，终端12与基站11的通信根据信道切换时间和信道配置从第一信道同步切换到第二信道的过程具体如前文所述，在此不再赘述。
综上，本发明的基站11可与终端12同步进行信道的切换，加快了切换的时间，并保持了数据传输的连续性，提高用户体验；另一方面，基站11离散终端12通过第二信道与基站11建立连接的时机，使得终端12与基站11随机建立连接，由此可提高终端12与基站11建立连接的畅通性。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (37)

  1. 一种基站，其特征在于，所述基站包括：
    发送模块，用于向终端发送指示消息，其中所述指示消息用于指示所述终端在通过第一信道与所述基站保持连接的情况下进一步通过第二信道与所述基站建立连接，所述第一信道和所述第二信道具有不同的频率；
    接收模块，用于通过所述第一信道接收所述终端发送的接入消息，所述接入消息指示所述终端已通过所述第二信道与所述基站建立连接；
    所述发送模块还用于发送切换命令至所述终端，所述切换命令指示所述终端将与所述基站的通信从所述第一信道切换到所述第二信道；
    切换模块，用于将与所述终端的通信从所述第一信道切换到所述第二信道。
  2. 根据权利要求1所述的基站，其特征在于，所述指示消息还包括随机接入时机参数，所述基站进一步包括离散模块，用于利用所述随机接入时机参数离散所述终端通过所述第二信道与所述基站随机建立连接的时机。
  3. 根据权利要求1所述的基站，其特征在于，所述切换命令还包括信道切换时间，所述信道切换时间用于指示所述终端从所述第一信道到所述第二信道的切换时间。
  4. 根据权利要求1或3任一项所述的基站，其特征在于，所述切换命令还包括信道配置，所述信道配置指示所述终端在使用所述第二信道进行数据传输时所使用的配置。
  5. 根据权利要求4所述的基站，其特征在于，所述信道配置指示所述终端在所述第二信道上使用与所述第一信道相同的配置与所述基站通信，其中，所述相同的配置指所述第一信道和所述第二信道的频率资源的带宽保持不变，且所述第一信道和所述第二信道的中心频点偏移相对值，所述相对值为所述第一信道与所述第二信道的频率差值。
  6. 根据权利要求4所述的基站，其特征在于，所述信道配置指示所述终端保持所述第一信道直至所述第一信道上的缓存数据收发完毕，并在所述第二信道上使用与所述第一信道不同的配置与所述基站通信。
  7. 一种终端，其特征在于，所述终端包括：
    接收模块，用于接收基站发送的指示消息，所述指示消息用于指示所述终端在通过第一信道与所述基站保持连接的情况下进一步通过第二信道与所述基站建立连接，所述第一信道和所述第二信道具有不同的频率；
    连接模块，用于通过所述第二信道与所述基站建立连接；
    发送模块，用于通过所述第一信道向所述基站发送接入消息，所述接入消息指示所述终端已通过所述第二信道与所述基站建立连接；
    所述接收模块，还用于接收所述基站发送的切换命令，所述切换命令指示所述终端将与所述基站的通信从所述第一信道切换到所述第二信道；
    切换模块，用于将与所述基站的通信从所述第一信道切换到所述第二信道。
  8. 根据权利要求7所述的终端，其特征在于，所述指示消息还包括随机接入时机参数，随机接入时机参数用于离散所述终端通过所述第二信道与所述基站随机建立连接的时机，所述连接模块还用于所述终端通过所述第二信道根据所述与所述基站随机建立连接的时机与所述基站建立连接。
  9. 根据权利要求7所述的终端，其特征在于，所述切换命令还包括信道切换时间，所述信道切换时间用于指示所述终端从所述第一信道到所述第二信道的切换时间。
  10. 根据权利要求7或9任一项所述的终端，其特征在于，所述切换命令还包括信道配置，所述信道配置指示所述终端在使用所述第二信道进行数据传输时所使用的配置。
  11. 根据权利要求10所述的终端，其特征在于，所述信道配置指示所述终端在所述第二信道上使用与所述第一信道相同的配置与所述基站通信，其中，所述相同的配置指所述第一信道和所述第二信道的频率资源的带宽保持不变，且所述第一信道和所述第二信道的中心频点偏移相对值，所述相对值为所述第一信道与所述第二信道的频率差值。
  12. 根据权利要求10所述的终端，其特征在于，所述信道配置指示所述终端保持所述第一信道直至所述第一信道上的缓存数据收发完毕，并在所述第二信道上使用与所述第一信道不同的配置与所述基站通信。
  13. 一种基站，其特征在于，所述基站包括网络接口、存储器、处理器以及总线，所述网络接口、所述存储器以及所述处理器与所述总线连接，其中：
    所述存储器用于存储程序，所述处理器用于调用所述程序进行以下步骤：
    通过所述网络接口向终端发送指示消息，所述指示消息用于指示所述终端在通过第一信道与所述基站保持连接的情况下进一步通过第二信道与所述基站建立连接，所述第一信道和所述第二信道具有不同的频率；
    通过所述第一信道接收所述终端发送的接入消息，所述接入消息指示所述终端已通过所述第二信道与所述基站建立连接；
    通过所述网络接口发送切换命令至所述终端，所述切换命令指示所述终端将与所述基站的通信从所述第一信道切换到所述第二信道；
    将与所述终端的通信从所述第一信道切换到所述第二信道。
  14. 根据权利要求13所述的基站，其特征在于，所述指示消息还包括随机接入时机参数，所述程序还进行以下步骤：
    所述随机接入时机参数离散所述终端通过所述第二信道与所述基站随机建立连接的时机。
  15. 根据权利要求13所述的基站，其特征在于，所述切换命令还包括信道切换时间，所述信道切换时间用于指示所述终端从所述第一信道到所述第二信道的切换时间。
  16. 根据权利要求13或15任一项所述的基站，其特征在于，所述切换命令还包括信道配置，所述信道配置指示所述终端在使用所述第二信道进行数据传输时所使用的配置。
  17. 根据权利要求16所述的基站，其特征在于，所述信道配置指示所述终端在所述第二信道上使用与所述第一信道相同的配置与所述基站通信，其中，所述相同的配置指第一信道和第二信道的频率资源的带宽保持不变，且所述第一信道和所述第二信道的中心频点偏移相对值，所述相对值为所述第一信道与所述第二信道的频率差值。
  18. 根据权利要求16所述的基站，其特征在于，所述信道配置指示所述终端保持所述第一信道直至所述第一信道上的缓存数据收发完毕，并在所述第二信道上使用与所述第一信道不同的配置与所述基站通信。
  19. 一种终端，其特征在于，所述终端包括网络接口、存储器、处理器以及总线，所述网络接口、所述存储器以及所述处理器与所述总线连接，其中：
    所述存储器用于存储程序，所述处理器用于调用所述程序进行以下步骤：
    通过所述网络接口接收基站发送的指示消息，所述指示消息用于指示所述终端在通过第一信道与所述基站保持连接的情况下进一步通过第二信道与所述基站建立连接，所述第一信道和所述第二信道具有不同的频率；
    通过所述第二信道与所述基站建立连接；
    通过所述第一信道向所述基站发送接入消息，所述接入消息指示所述终端已通过所述第二信道与所述基站建立连接；
    通过所述网络接口进一步接收所述基站发送的切换命令，所述切换命令指示所述终端将与所述基站的通信从所述第一信道切换到所述第二信道；
    将与所述基站的通信从所述第一信道切换到所述第二信道。
  20. 根据权利要求19所述的终端，其特征在于，所述指示消息还包括随机接入时机参数，随机接入时机参数用于离散所述终端通过所述第二信道与所述基站随机建立连接的时机，所述程序进一步进行以下步骤：
    指示所述终端通过所述第二信道根据所述与所述基站随机建立连接的时机与所述基站建立连接。
  21. 根据权利要求19所述的终端，其特征在于，所述切换命令还包括信道切换时间，所述信道切换时间用于指示所述终端从所述第一信道到所述第二信道的切换时间。
  22. 根据权利要求19或21任一项所述的终端，其特征在于，所述切换命令还包括信道配置，所述信道配置指示所述终端在使用所述第二信道进行数据传输时所使用的配置。
  23. 根据权利要求22所述的终端，其特征在于，所述信道配置指示所述终端在所述第二信道上使用与所述第一信道相同的配置与所述基站通信，其中，所述相同的配置指第一信道和第二信道的频率资源的带宽保持不变，且所述第一信道和所述第二信道的中心频点偏移相对值，所述相对值为所述第一信道与所述第二信道的频率差值。
  24. 根据权利要求22所述的终端，其特征在于，所述信道配置指示所述终端保持所述第一信道直至所述第一信道上的缓存数据收发完毕，并在所述第二信道上使用与所述第一信道不同的配置与所述基站通信。
  25. 一种切换方法，其特征在于，所述方法包括：
    基站向终端发送指示消息，所述指示消息用于指示所述终端在通过第一信道与所述基站保持连接的情况下进一步通过第二信道与所述基站建立连接，所述第一信道和所述第二信道具有不同的频率；
    所述基站通过所述第一信道接收所述终端发送的接入消息，所述接入消息指示所述终端已通过所述第二信道与所述基站建立连接；
    所述基站发送切换命令至所述终端，所述切换命令指示所述终端将与所述基站的通信从所述第一信道切换到所述第二信道；
    所述基站将与所述终端的通信从所述第一信道切换到所述第二信道。
  26. 根据权利要求25所述的方法，其特征在于，所述基站包括主小区和辅小区，其中，所述辅小区包括所述第一信道和所述第二信道：
    所述基站向终端发送指示消息的步骤包括：
    所述基站通过所述第一信道或所述主小区向终端发送指示消息；
    所述基站发送切换命令至所述终端的步骤进一步包括：
    所述基站通过所述第一信道或所述主小区发送切换命令至所述终端。
  27. 根据权利要求26所述的方法，其特征在于，所述指示消息还包括随机接入时机参数，所述随机接入时机参数用于离散所述终端通过所述第二信道与所述基站随机建立连接的时机。
  28. 根据权利要求26所述的方法，其特征在于，所述切换命令还包括信道切换时间，所述信道切换时间用于指示所述终端从所述第一信道到所述第二信道的切换时间。
  29. 根据权利要求26-28任一项所述的方法，其特征在于，所述切换命令还包括信道配置，所述信道配置指示所述终端在使用所述第二信道进行数据传输时所使用的配置。
  30. 根据权利要求29所述的方法，其特征在于，所述信道配置指示所述终端在所述第二信道上使用与所述第一信道相同的配置与所述基站通信，其中，所述相同的配置指所述第一信道和所述第二信道的频率资源的带宽保持不变，且所述第一信道与所述第二信道的中心频点偏移相对值，所述相对值为所述第一信道与所述第二信道的频率差值。
  31. 根据权利要求29所述的方法，其特征在于，所述信道配置指示所述终端保持所述第一信道直至所述第一信道上的缓存数据收发完毕，并在所述第二信道上使用与所述第一信道不同的配置与所述基站通信。
  32. 一种切换方法，其特征在于，所述方法：
    终端接收基站发送的指示消息，所述指示消息用于指示所述终端在通过第一信道与所述基站保持连接的情况下进一步通过第二信道与所述基站建立连接，所述第一信道和所述第二信道具有不同的频率；
    所述终端通过所述第二信道与所述基站建立连接；
    所述终端通过所述第一信道向所述基站发送接入消息，所述接入消息指示所述终端已通过所述第二信道与所述基站建立连接；
    所述终端接收所述基站发送的切换命令，所述切换命令指示所述终端将与所述基站的通信从所述第一信道切换到所述第二信道；
    所述终端将与所述基站的通信从所述第一信道切换到所述第二信道。
  33. 根据权利要求32所述的方法，其特征在于，所述指示消息还包括随机接入时机参数，随机接入时机参数用于离散所述终端通过所述第二信道与所述基站随机建立连接的时机，所述终端通过所述第二信道与所述基站建立连接进一步包括：
    所述终端通过所述第二信道根据所述与所述基站随机建立连接的时机与所述基站建立连接。
  34. 根据权利要求32所述的方法，其特征在于，所述切换命令还包括信道切换时间，所述信道切换时间用于指示所述终端从所述第一信道到所述第二信道的切换时间。
  35. 根据权利要求32或34任一项所述的方法，其特征在于，所述切换命令还包括信道配置，所述信道配置指示所述终端在使用所述第二信道进行数据传输时所使用的配置。
  36. 根据权利要求35所述的方法，其特征在于，所述信道配置指示所述终端在所述第二信道上使用与所述第一信道相同的配置与所述基站通信，其中，所述相同的配置指所述第一信道和所述第二信道的频率资源的带宽保持不变，且所述第一信道和所述第二信道的中心频点偏移相对值，所述相对值为所述第一信道与所述第二信道的频率差值。
  37. 根据权利要求35所述的方法，其特征在于，所述信道配置指示所述终端保持所述第一信道直至所述第一信道上的缓存数据收发完毕，并在所述第二信道上使用与所述第一信道不同的配置与所述基站通信。
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EP3107331B1 (en) 2018-05-02
US20160373979A1 (en) 2016-12-22
CN105103514A (zh) 2015-11-25
JP6366729B2 (ja) 2018-08-01
EP3107331A1 (en) 2016-12-21
CN105103514B (zh) 2018-06-05
US10004013B2 (en) 2018-06-19

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