WO2023131282A1 - 通信方法、通信装置与通信系统 - Google Patents

通信方法、通信装置与通信系统 Download PDF

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Publication number
WO2023131282A1
WO2023131282A1 PCT/CN2023/070960 CN2023070960W WO2023131282A1 WO 2023131282 A1 WO2023131282 A1 WO 2023131282A1 CN 2023070960 W CN2023070960 W CN 2023070960W WO 2023131282 A1 WO2023131282 A1 WO 2023131282A1
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WO
WIPO (PCT)
Prior art keywords
terminal
resource control
radio resource
network device
connection
Prior art date
Application number
PCT/CN2023/070960
Other languages
English (en)
French (fr)
Inventor
方宇哲
彭文杰
Original Assignee
华为技术有限公司
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
Priority claimed from CN202210585646.5A external-priority patent/CN116456507A/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to KR1020247025710A priority Critical patent/KR20240125680A/ko
Priority to EP23737144.8A priority patent/EP4447607A4/en
Priority to JP2024540840A priority patent/JP2025502051A/ja
Publication of WO2023131282A1 publication Critical patent/WO2023131282A1/zh
Priority to US18/766,240 priority patent/US20240365204A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H04W36/362—Conditional handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/23—Manipulation of direct-mode connections
    • 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
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/32—Release of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/34—Selective release of ongoing connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/38—Connection release triggered by timers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present application relates to the communication field, and more specifically, relates to a communication method, a communication device, and a communication system.
  • a relay (relay) terminal may serve as a relay device to relay data transmitted between a remote (remote) terminal and a network device.
  • the network device may release a radio resource control (radio resource control, RRC) connection between the relay terminal and the network device. This situation may cause interruption of data transmitted by the remote terminal.
  • RRC radio resource control
  • the present application provides a communication method, a communication device and a communication system, which can avoid interruption of data transmitted by a remote terminal.
  • a communication method including: receiving radio resource control release information sent by a first network device, where the radio resource control release information is used to indicate the release of the communication between the first terminal and the first network device The first radio resource control connection; sending first indication information to the second terminal, where the first terminal is a relay device for the second terminal to access the first network device, and the first indication information is used To indicate at least one of the following information: releasing the sidelink between the first terminal and the second terminal, indicating that the first radio resource control connection is released, and indicating that the first The state of the radio resource control connection is a connection failure state.
  • the remote terminal can perform follow-up processing according to the first indication information, so as to avoid interruption of data transmitted by the remote terminal.
  • the method further includes: establishing a second radio resource control connection with a second network device, where the second radio resource control connection is used for the second terminal to access the first 2. Network equipment.
  • the first terminal When the first radio resource control connection between the first terminal serving as a relay device and the first network device is released, the first terminal establishes a second radio resource control connection with the second network device, Therefore, the second terminal accesses the second network device through the second radio resource control connection, which can avoid interruption of data transmitted by the second terminal.
  • the method further includes: receiving second indication information sent by the second terminal, where the second indication information is used to indicate to maintain the sidelink.
  • the first terminal establishes the second radio resource control connection with the second network device when receiving the second indication information sent by the second terminal for indicating to maintain the sidelink. That is to say, the establishment of the second radio resource control connection depends on the response of the second terminal to the sidelink maintenance sent by the first indication information, so as to avoid establishing the second radio resource control connection in the case of invalidity and reduce the resource usage.
  • the establishing the second radio resource control connection with the second network device includes: establishing the second radio resource control connection with the second network device when the sidelink is not disconnected at the detection time point.
  • the detection time point includes a time point of a first duration after the first indication information is sent.
  • the fact that the sidelink is not disconnected at the detection time point may be interpreted as the second terminal's response to the first indication information for maintaining the sidelink. That is to say, the establishment of the second radio resource control connection depends on the response of the second terminal to the sidelink maintenance sent by the first indication information, so as to avoid establishing the second radio resource control connection in the case of invalidity and reduce the resource usage.
  • the method further includes: the radio resource control release information is when the first terminal meets the handover condition, and there is no communication between the first terminal and the first network device. received in the context of the session of the first terminal.
  • the switching condition may be, for example, that at least one measurement event is met.
  • the first network device may send at least one measurement event to the first terminal.
  • the first terminal device can perform measurements periodically or aperiodically.
  • the first terminal may send a measurement report to the first network device.
  • the first network device receives the measurement report, it can determine that the handover condition is met.
  • the first network device may send at least one measurement event to the first terminal, which may include one or more of the following events: the signal quality of the serving cell becomes lower than the corresponding threshold; the signal quality of the neighboring cell becomes higher than the signal quality of the serving cell by a certain deviation The signal quality of the neighboring cell becomes higher than the corresponding threshold; the signal quality of the serving cell becomes lower than the threshold 1 and the signal quality of the neighboring cell becomes higher than the threshold 2; the signal quality of the neighboring cell becomes higher than that of the secondary cell (Scell) signal If the quality is high, there is a certain bias; the signal quality of the inter radio access technology (Inter-RAT) neighboring cell becomes higher than the corresponding threshold; the signal quality of the primary cell (Pcell) becomes lower than the threshold 1 and the inter-system neighboring cell The signal quality becomes higher than Threshold 2.
  • Inter-RAT inter radio access technology
  • the first network device may send a radio resource control release to the first terminal information, and release the first radio resource control connection with the first terminal.
  • the method further includes: determining the connection status of the first radio resource control connection; sending status indication information to the second terminal, where the status indication information includes the first status information, the second status information Information or third state information, the first state information is used to indicate that the connection state is being established, the second state information is used to indicate that the connection state is established, and the third state information is used Indicates that the connection state is a state of establishment failure.
  • the first terminal sends status indication information to the second terminal to indicate the connection status of the first RRC connection, so that there is no need to indicate events related to the first RRC connection, and information redundancy is reduced.
  • the first terminal may send status indication information to the second terminal to indicate the connection status of the second RRC connection. That is to say, the status indication information is used to indicate the radio resource control connection between the first terminal and the network device serving the first terminal.
  • the determining the connection state of the first radio resource control connection includes: when the first terminal is switching, the first radio resource control connection is being established, or when a radio link occurs In the case that the first radio resource control connection whose path fails is recovering, determine that the connection state is the establishing state; when the first terminal completes the handover, the establishment of the first radio resource control connection is completed, or If the radio link failure recovery of the first radio resource control connection is completed, determine that the connection state is the establishment completed state; if the first terminal device fails to switch, the first radio resource control connection fails to be established , when a radio link failure occurs in the first radio resource control connection, and the restoration of the first radio resource control connection in which the radio link failure occurs fails, or the first radio resource control connection is released, determine The connection state is the establishment failure state.
  • the same information can be used for indication, thereby reducing the information required
  • the number of bits reduces the redundancy of information.
  • a communication method comprising: determining the connection status of the first radio resource control connection between the first terminal and the first network device; sending status indication information to the second terminal, the status indication
  • the information includes first state information, second state information or third state information, the first state information is used to indicate that the connection state is being established, and the second state information is used to indicate that the connection state is established
  • the completion state and the third state information are used to indicate that the connection state is an establishment failure state
  • the first terminal is a relay device for the second terminal to access the first network device.
  • the first terminal sends status indication information to the second terminal to indicate the connection status of the first RRC connection, so that there is no need to indicate events related to the first RRC connection, and information redundancy is reduced.
  • the determining the connection state of the first radio resource control connection between the first terminal and the first network device includes: when the first terminal is switching, the first radio resource control When the connection is being established, or the first radio resource control connection is recovering when a radio link failure occurs, determine that the connection state is the establishing state; when the first terminal completes the handover, the second When the establishment of a radio resource control connection is completed, or the radio link failure recovery of the first radio resource control connection is completed, determine that the connection state is the establishment completed state; when the handover of the first terminal device fails, the The establishment of the first radio resource control connection fails, a radio link failure occurs in the first radio resource control connection, and the restoration of the first radio resource control connection in which the radio link failure occurs fails, or the first radio resource control connection When the control connection is released, it is determined that the connection state is the establishment failure state.
  • the determining the connection status of the first radio resource control connection between the first terminal and the first network device includes: receiving the radio resource control release information sent by the first network device In this case, it is determined that the connection state is the establishment failure state, and the radio resource control release information is used to indicate to release the first radio resource control connection.
  • the method further includes: establishing a second radio resource control connection with a second network device, where the second radio resource control connection is used for the second terminal to access the first 2. Network equipment.
  • the method further includes: receiving second indication information sent by the second terminal, where the second indication information is used to indicate to maintain the sidelink.
  • the establishing the second radio resource control connection with the second network device includes: establishing the second radio resource control connection with the second network device when the sidelink is not disconnected at the detection time point.
  • the detection time point includes a time point of a first duration after the first indication information is sent.
  • the radio resource control release information is when the first terminal meets the handover condition, and there is no communication between the first terminal and the first network device belonging to the first terminal received in the context of a session.
  • a communication method includes: determining that the first terminal satisfies the switching condition, and there is no session belonging to the first terminal between the first terminal and the first network device, and the first terminal is a relay device for the second terminal to access the first network device, There is a first radio resource control connection between the first terminal and the first network device; sending radio resource control release information to the first terminal, where the radio resource control release information is used to indicate the release of the first radio resource control connection between the first terminal and the first network device A RRC connection.
  • the first network device may instruct the first terminal to release the radio resource control connection, so that the first terminal may send the first indication information to the second terminal , so that the second terminal can perform subsequent processing according to the first instruction information, so as to avoid interruption of data transmitted by the second terminal.
  • the method further includes: receiving a measurement report from the first terminal, where the measurement report includes information indicating the signal quality obtained by measurement by the first terminal; according to the measurement report, determining that the first terminal satisfies the handover condition.
  • the first network device may determine whether the first terminal satisfies the handover condition through the measurement report from the first terminal, so as to determine whether to send handover instruction information to the first terminal.
  • the method further includes: releasing the first radio resource control connection between the first terminal and the first network device.
  • the first network device may release the first radio resource control connection with the first terminal after sending the radio resource control release information to the first terminal.
  • a communication method includes: determining whether there is a session belonging to the first terminal between the first terminal and the first network device, and the first terminal is a relay device through which the second terminal accesses the first network device; if there is no session belonging to the first terminal During the session, sending a first radio resource control reconfiguration message to the first terminal, where the first radio resource control reconfiguration message includes information indicating at least one non-measurable cell and/or at least one measurable cell covered by the first network device .
  • the first network device may instruct the first terminal to measure only the cell covered by the first network device, so that the first terminal can switch from the current serving cell to the cell covered by the first network device A cell with better signal quality can avoid interruption of data transmitted by the second terminal through the first terminal.
  • the method further includes: when there is a session belonging to the first terminal, sending a second radio resource control reconfiguration message to the first terminal, where the second radio resource control reconfiguration message includes a message indicating that the first Information about a cell covered by a network device and/or other cells, where the other cells are cells other than the cell covered by the first network device.
  • the first network device may send a second radio resource control reconfiguration message to the first terminal when there is a session belonging to the first terminal, so that the first terminal may perform signal measurement according to the second radio resource control reconfiguration message to determine whether There are cells with better signal quality.
  • the second radio resource control reconfiguration message includes any one or more of the following: at least one measurement event, a whitelist of measurable cells, or a blacklist of unmeasurable cells, where the whitelist of measurable cells includes the first At least one measurable cell within or outside the coverage of the network device, and the blacklist of unmeasurable cells includes at least one unmeasurable cell.
  • the first network device may send the second radio resource control reconfiguration message to the first terminal, so that the first terminal can switch to a network with better signal quality when there is a session belonging to the first terminal.
  • the method further includes: receiving a first measurement report from the first terminal, where the first measurement report is determined according to the first radio resource control reconfiguration message or the second radio resource control reconfiguration message.
  • the first network device may send different radio resource control reconfiguration messages to the first terminal, and may also receive the first measurement report from the first terminal, so as to determine whether to send handover instruction information to the first terminal.
  • the method further includes: receiving a second measurement report from the first terminal, where the second measurement report includes information indicating the signal quality obtained by the first terminal measurement; according to the second measurement report, It is determined that the first terminal satisfies the handover condition.
  • the first network device may determine whether the first terminal meets the handover condition according to the second measurement report from the first terminal, so as to determine whether to send handover indication information to the first terminal.
  • the first network device may also determine whether there is a session belonging to the first terminal after receiving the second measurement report, so as to send the first radio resource control reconfiguration message or the second radio resource control reconfiguration message to the first terminal.
  • a communication method includes: when there is no session belonging to the first terminal between the first terminal and the first network device, receiving a first radio resource control reconfiguration message from the first network device, the first radio resource control reconfiguration message Including information indicating at least one non-measurable cell and/or at least one measurable cell covered by the first network device, the first terminal is a relay device for the second terminal to access the first network device; according to the first radio resource control Reconfigure messages and perform signal measurements.
  • the first terminal may perform signal measurement according to the first radio resource control reconfiguration message, so as to avoid interruption of the connection with the first network device, causing the second terminal to fail to communicate with the first terminal through the first terminal.
  • the first network device transmits data.
  • a second radio resource control reconfiguration message from the first network device is received, and the second radio resource control reconfiguration message includes information for indicating the first network Information about the cell covered by the device and/or other cells, where the other cell is a cell other than the cell covered by the first network device; perform signal measurement according to the second radio resource control reconfiguration message.
  • the first terminal may perform signal measurement according to the first radio resource control reconfiguration message, so as to determine whether there is a cell with better signal quality.
  • the second radio resource control reconfiguration message includes any one or more of the following: at least one measurement event, a whitelist of measurable cells, or a blacklist of unmeasurable cells, where the whitelist of measurable cells includes the first At least one measurable cell within or outside the coverage of the network device, and the blacklist of unmeasurable cells includes at least one unmeasurable cell.
  • the first terminal may perform signal measurement according to the first radio resource control reconfiguration message, so as to switch to a network with better signal quality when there is a session belonging to the first terminal.
  • the method further includes: sending a first measurement report to the first network device, where the first measurement report is determined according to the first radio resource control reconfiguration message or the second radio resource control reconfiguration message.
  • the first terminal can perform signal measurement according to different radio resource control reconfiguration messages, and send different measurement reports to the first network device, so that the first network device can obtain information about the signal quality of each cell.
  • the method further includes: before receiving the first radio resource control reconfiguration message or the second radio resource control reconfiguration message from the first network device, sending the second measurement to the first network device report, the second measurement report includes information used to indicate the signal quality obtained by the first terminal measurement.
  • the first terminal may send the second measurement report to the first network device, so as to report the signal quality obtained by measurement to the first network device, and make the first network device determine to send the first radio resource control reconfiguration message or the second radio resource Control reconfiguration messages.
  • the first terminal may send the second measurement report to the first network device, so that the first network device may determine not to send the radio resource control reconfiguration message, and not to perform handover on the first terminal.
  • a communication device including various modules for performing the method in any one of the implementation manners of the first aspect, the second aspect, or the fifth aspect.
  • a communication device including various modules for executing the method in any one of the implementation manners of the third aspect or the fourth aspect.
  • a communication device including at least one processor and a communication interface, the communication interface is used for the communication device to exchange information with other communication devices, when the program instructions are executed in the at least one processor , so that the communication device executes the method in any one of the implementation manners of the first aspect, the second aspect, or the fifth aspect.
  • a communication device including at least one processor and a communication interface, the communication interface is used for the communication device to exchange information with other communication devices, when program instructions are executed in the at least one processor , so that the communication device executes the method in any one implementation manner of the third aspect or the fourth aspect.
  • a tenth aspect provides a communication system, including a second terminal, the communication device described in the sixth aspect or the eighth aspect, and the communication device described in the seventh aspect or the ninth aspect.
  • a computer-readable medium stores program code for execution by a device, and the program code includes instructions for implementing the first aspect, the second aspect, the third aspect, the fourth aspect, Or the method in any implementation manner in any aspect of the fifth aspect.
  • a computer program product containing instructions is provided, and when the computer program product is run on a computer, it causes the computer to execute the first aspect, the second aspect, the third aspect, the fourth aspect, or the fifth aspect A method in any implementation in any aspect.
  • a thirteenth aspect provides a chip, the chip includes a processor and a data interface, the processor reads the instructions stored on the memory through the data interface, and executes the first aspect, the second aspect, and the third aspect above , the fourth aspect, or the method in any implementation manner of any one of the fifth aspect.
  • the chip may further include a memory, the memory stores instructions, the processor is configured to execute the instructions stored in the memory, and when the instructions are executed, the The processor is configured to execute the method in any implementation manner of any one of the first aspect, the second aspect, the third aspect, the fourth aspect, or the fifth aspect.
  • the aforementioned chip may specifically be a field-programmable gate array (field-programmable gate array, FPGA) or an application-specific integrated circuit (application-specific integrated circuit, ASIC).
  • FPGA field-programmable gate array
  • ASIC application-specific integrated circuit
  • FIG. 1 is a schematic diagram of a scenario of a communication manner between devices.
  • Fig. 2 is a schematic flowchart of a communication method.
  • Fig. 3 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • Fig. 4 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • Fig. 6 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 7 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • Fig. 8 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • Fig. 9 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • Fig. 10 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • Fig. 11 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • Fig. 12 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • GSM global system for mobile communications
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • general packet radio service general packet radio service, GPRS
  • long term evolution long term evolution
  • LTE long term evolution
  • LTE frequency division duplex frequency division duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunications System
  • WiMAX Worldwide Interoperability for Microwave Access
  • 5G Fifth Generation
  • NR new radio
  • FIG. 1 is a schematic diagram of a scenario of a communication manner between devices.
  • the communication interface (Uu port) between the terminal 121 and the network device 110 and the communication interface (PC5 port) between the terminal 121 and the terminal 122 The Uu port is used for communication between the user equipment and the base station or the roadside unit, and the PC5 port is used for sidelink communication between terminals.
  • the link on the Uu port where the terminal sends data to the base station is called an uplink, and the link where the terminal receives data sent by the base station is called a downlink.
  • the communication interface between the terminal and the terminal is called PC5 port.
  • the link for transmitting data between terminals on the PC5 port is called a sidelink or a direct link.
  • Sidelinks are generally used in scenarios where direct communication between devices, such as device to device (D2D), can be performed. In this scenario, data transmission between devices does not need to pass through the base station.
  • V2X Vehicle to everything
  • radio resource control radio resource control
  • DRB data radio bearer
  • SRB signaling radio bearer
  • a radio bearer includes a packet data convergence protocol (packet data convergence protocol, PDCP) entity and a radio link control (radio link control, RLC) bearer.
  • PDCP packet data convergence protocol
  • RLC radio link control
  • an RLC bearer includes an RLC entity and a corresponding logical channel (Logical Channel, LCH).
  • the configuration of the radio bearer is the configuration of the PDCP entity, the RLC entity and the logical channel of the radio bearer.
  • the configuration of the radio bearer needs to be able to guarantee the service quality (quality of service, QoS) requirement of the service transmitted through the radio bearer.
  • the radio bearer configuration is configured by the network device for the terminal.
  • the radio bearer on the PC5 port may be called a sidelink radio bearer (SL RB).
  • SL RB sidelink radio bearer
  • the wireless bearer on the PC5 port is established by the transmitting terminal and the receiving terminal respectively, and the configuration of the wireless bearer is predefined by the standard or determined by the transmitting terminal and the receiving terminal .
  • Terminals can communicate with network devices.
  • a terminal may refer to an access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, user equipment (UE), wireless communication device, user agent, or user device.
  • the user equipment can also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminals in the 5G network or any form of user equipment in the future network, etc., the embodiments of the present application are not limited to this .
  • the network device in this embodiment of the present application may be a device for communicating with a terminal, and for connecting the terminal to a radio access network (radio access network, RAN).
  • a network device may also sometimes be referred to as an access network device, an access network node, or a base station. It can be understood that, in systems using different wireless access technologies, the names of the equipment with the base station function may be different.
  • the embodiments of the present application will collectively refer to devices that provide a terminal with a wireless communication access function as network devices.
  • the network equipment can be a base transceiver station (BTS) in a global system for mobile communications (GSM) system or code division multiple access (CDMA), or a wideband code division multiple access (CDMA)
  • the base station (NodeB, NB) in the wideband code division multiple access (WCDMA) system can also be the evolved base station (evoled NodeB, eNB or eNodeB) in the LTE system, or the cloud radio access network (cloud radio access network) , the wireless controller in the CRAN) scenario, or the network device can be a relay station, an access point, a vehicle device, a wearable device, a network device in a 5G network or a network device in a future evolved PLMN network, and a network device in a 5G system
  • the terminal or network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also called main memory).
  • the operating system may be any one or more computer operating systems that implement business processing through processes, for example, Linux operating system, Unix operating system, Android operating system, iOS operating system, or windows operating system.
  • the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiment of the present application does not specifically limit the specific structure of the execution subject of the method provided by the embodiment of the present application, as long as the program that records the code of the method provided by the embodiment of the present application can be run to provide the method according to the embodiment of the present application.
  • the execution subject of the method provided by the embodiment of the present application may be a terminal or a network device, or a functional module in a terminal or a network device that can call a program and execute the program, such as a chip or a processor, etc. .
  • computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disk, floppy disk, or tape, etc.), optical disks (e.g., compact disc (compact disc, CD), digital versatile disc (digital versatile disc, DVD) etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), card, stick or key drive, etc.).
  • various storage media described herein can represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable medium” may include, but is not limited to, wireless channels and various other media capable of storing, containing and/or carrying instructions and/or data.
  • a relay (relay) terminal may serve as a relay device to relay data transmitted between a remote (remote) terminal and a network device.
  • terminal 121 may serve as a relay terminal, and terminal 121 may serve as a remote terminal.
  • Fig. 2 is a schematic flowchart of a communication method.
  • the method 200 includes S201 to S208.
  • the source base station sends a first RRC reconfiguration message to the terminal.
  • the first RRC reconfiguration message configures at least one measurement event for the terminal to measure signals of each base station.
  • the first RRC reconfiguration message may be used to configure at least one measurement event.
  • one measurement event in the at least one measurement event may be that the signal strength of the serving cell is lower than the threshold and the signal strength of the target cell is higher than the threshold.
  • the serving cell is one of at least one cell covered by the source base station.
  • the target cell may be one of at least one cell covered by the target base station.
  • the terminal can perform measurement according to the at least one measurement event.
  • one measurement event in the at least one measurement event may be that the signal strength of the source base station is less than a threshold and the signal strength of the target base station is greater than or equal to the threshold, then the terminal may measure the signal strength of each base station.
  • the source base station may send the first RRC reconfiguration message to the terminal after establishing the RRC connection with the terminal.
  • the terminal may perform measurement periodically, and determine whether the measurement result conforms to any one of the at least one measurement event.
  • the terminal sends a measurement report (measure report, MR) to the source base station when the measurement result satisfies any measurement event.
  • a measurement report (measure report, MR)
  • the MR may include a measurement event of the at least one measurement event for which the measurement result is consistent.
  • the MR may also include a target cell or a target base station that makes the measurement result conform to the measurement time.
  • the target cell may be a cell covered by the target base station.
  • the source base station sends a handover request message to the target base station according to the MR sent by the terminal.
  • the source base station may send a handover request message to the target base station when the terminal has services.
  • the target base station may send a handover confirmation message to the source base station.
  • the target base station decides whether to allow the terminal to access according to the number of other terminals connected to it. If the target base station determines to allow the terminal to access, it may send a handover confirmation message to the source base station.
  • Sending the handover confirmation message may include relevant information of the target cell and relevant configuration parameters required for the terminal to access the target cell.
  • the relevant information of the target cell may include a physical cell identifier (PCI) of the target cell, frequency information corresponding to the target cell, and a cell radio network temporary identifier (cell radio network temporary identifier) of the target cell allocated by the target base station for the terminal.
  • PCI physical cell identifier
  • cell radio network temporary identifier cell radio network temporary identifier
  • the relevant configuration parameters required by the terminal to access the target cell include random access channel (random access channel, RACH) resource information (for example, dedicated RACH resources and/or public RACH resources) required to access the target cell, security information of the target base station One or more of related algorithms, etc.
  • RACH random access channel
  • the source base station may send a handover command message to the terminal.
  • the handover command message (which can also be understood as the second RRC reconfiguration message) may include relevant information of the target cell and relevant configuration parameters required for the terminal to access the target cell.
  • the terminal initiates random access to the target base station according to the handover command, and establishes an RRC connection with the target base station.
  • the terminal may initiate random access to the target base station after disconnecting the RRC connection with the source base station, and establish an RRC connection with the target base station after accessing the target base station.
  • the terminal sends an RRC reconfiguration complete message to the target base station.
  • the terminal may send an RRC reconfiguration complete message to the target base station when the RRC connection between the terminal and the target base station is successfully established.
  • the target base station sends an RRC connection release message to the source base station.
  • the source base station After receiving the context release message, the source base station can release the context of the terminal.
  • the terminal can complete handover (handover, HO) between cells.
  • the base station may cause data interruption of the remote terminal.
  • the terminal in FIG. 2 is a relay terminal, and there is no protocol data unit (protocol data unit, PDU) session of the terminal between the terminal and the source base station, after receiving the MR, the source base station no longer Performing S203 may cause data interruption of the remote terminal.
  • protocol data unit protocol data unit
  • an embodiment of the present application provides a communication method.
  • Fig. 3 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the method 300 includes S310 to S330.
  • the device for performing steps S320 and S330 may be the first terminal, or a component in the first terminal, such as a chip.
  • the first network device determines that the first terminal meets a handover condition and there is no session belonging to the first terminal.
  • the first network device may determine whether the first terminal satisfies the handover condition, and may also determine whether a session belonging to the first terminal exists between the first network device and the first terminal.
  • the first terminal is a relay device for the second terminal to access the first network device, and there is a first radio resource control connection (that is, a first RRC connection) between the first terminal and the first network device.
  • the switching condition may be, for example, that at least one measurement event is met.
  • the first network device may send at least one measurement event to the first terminal.
  • the first terminal device can perform measurements periodically or aperiodically.
  • the first terminal may send a measurement report to the first network device.
  • the first network device receives the measurement report, it can determine that the handover condition is met.
  • a measurement report may be used to indicate at least one measurement event fulfilled.
  • the first network device may send at least one measurement event to the first terminal, which may include one or more of the following events: the signal quality of the serving cell becomes lower than the corresponding threshold; the signal quality of the neighboring cell becomes higher than the signal quality of the serving cell by a certain deviation The signal quality of the neighboring cell becomes higher than the corresponding threshold; the signal quality of the serving cell becomes lower than the threshold 1 and the signal quality of the neighboring cell becomes higher than the threshold 2; the signal quality of the neighboring cell becomes higher than that of the secondary cell (Scell) signal If the quality is high, there is a certain bias; the signal quality of the inter radio access technology (Inter-RAT) neighboring cell becomes higher than the corresponding threshold; the signal quality of the primary cell (Pcell) becomes lower than the threshold 1 and the inter-system neighboring cell The signal quality becomes higher than Threshold 2.
  • Inter-RAT inter radio access technology
  • the first network device may further determine whether there is a session belonging to the first terminal. When there is no session belonging to the first terminal, the first network device may send a connection release message to the first terminal, where the connection release message is used to indicate to release the first RRC connection between the first terminal and the first network device.
  • the first network device may receive a measurement report from the first terminal, where the measurement report includes information used to indicate signal quality obtained by measurement by the first terminal.
  • the first network device may determine whether the first terminal meets the handover condition according to the measurement report.
  • the first network device may also release the first radio resource control connection with the first terminal.
  • connection release indication information is used to indicate to release the connection between the first terminal and the first network device.
  • connection release instruction information may be, for example, a radio resource control release message, where the radio resource control release message is used to instruct release of the first radio resource control connection between the first terminal and the first network device.
  • connection release indication information may be carried in an RRC message sent by the first network device to the first terminal. That is to say, the first network device may send connection release instruction information to the first terminal through the first radio resource control connection before releasing the first radio resource control connection between the first terminal and the first network device.
  • the first network device may release the first radio resource control connection and send a radio resource control release message to the first terminal when at least one of the following situations occurs: the network side RRC connection release information is received, and the load of the first network device exceeds the preset Set value, high-level authentication failure, low-level error (such as media access control (media access control, MAC) layer link failure, radio link control (radio link control, RLC) layer link failure, etc.), radio link control recovery And there is no session belonging to the first terminal, the timer corresponding to the first RRC connection expires, the message exchange through the first RRC connection fails, the switching condition is met and there is no session belonging to the first terminal, etc.
  • the network side RRC connection release information is received
  • the load of the first network device exceeds the preset Set value
  • high-level authentication failure such as media access control (media access control, MAC) layer link failure, radio link control (radio link control, RLC) layer link failure, etc.
  • radio link control recovery And there is no session belonging to the first terminal
  • the first terminal is a relay device for the second terminal to access the first network device
  • the first indication information is used to indicate the following information At least one of: releasing the sidelink between the first terminal and the second terminal, used to indicate that the first radio resource control connection is released, and used to indicate that the first radio resource control connection is released.
  • the state of the connection is Connection Unable to Acquire state.
  • the first indication information may be carried in an RRC message sent by the first terminal to the second terminal through a side link.
  • the sidelink between the first terminal and the second terminal may be an RRC connection established between the first terminal and the second terminal.
  • the RRC message sent by the first terminal to the second terminal through the sidelink may also be referred to as a PC5-RRC message.
  • the first indication information may be carried in the PC5-RRC message as a field of the PC5-RRC message.
  • the first indication information may be a PC5-RRC message.
  • the first indication information is sent to the second terminal serving as the remote terminal, so that the second terminal can according to The first instruction information is used to perform subsequent operations, thereby avoiding data interruption.
  • the first indication information may be used to indicate to release the sidelink between the first terminal and the second terminal.
  • the second terminal may perform relay reselection, or may initiate random access to the network device, and establish an RRC connection with the network device.
  • the first indication information may also be used to indicate that the first radio resource control connection is released, or used to indicate that the state of the first radio resource control connection is a state that the connection cannot be obtained.
  • the first indication information indicates the status of a radio resource control connection, which can reduce the redundancy of the first indication information.
  • radio link failure radio link failure
  • radio resource control release information is received
  • RLF recovery fails
  • RRC connection establishment fails
  • handover etc.
  • the third status information may be sent to the second terminal to indicate the status of the radio resource control connection between the first terminal and the network device. Therefore, after receiving the third state information, the second terminal may perform relay reselection, or may also initiate random access to the network device, and establish an RRC connection with the network device.
  • the first terminal sends the third state information to the second terminal, which can use the same information to indicate different specific events related to a certain connection state of the radio resource control connection between the first terminal and the network device, and can reduce the first indication Redundancy of information.
  • the first terminal may release the sidelink between the first terminal and the second terminal after the first indication information is sent.
  • the first terminal may perform subsequent operations according to the second terminal's response to the first indication information.
  • the first terminal may establish a second radio resource control connection with the second network device.
  • the second radio resource control connection is used for the second terminal to access the second network device. That is to say, the first terminal reselects a network device for the second terminal to provide services for the second terminal.
  • the second terminal may send the second indication information to the first terminal after receiving the first indication information.
  • the second indication information is used to indicate to maintain the sidelink.
  • the second indication information may be understood as a response of the second terminal to the first indication information.
  • the first terminal receives the second indication information, that is, acquires a response from the second terminal indicating that the sidelink is maintained.
  • the second terminal may disconnect or maintain the sidelink with the first terminal after receiving the first indication information.
  • the first terminal may detect the sidelink at a detection time point of a first duration after the sending of the first indication information. If the detection result at the detection time point is that the sidelink still exists, that is, the sidelink is not released by the second terminal, but is held by the second terminal, then the first terminal obtains that the second terminal indicates that the sidelink is maintained road response.
  • the first duration may be preset, may also be determined by agreement between the second terminal and the first terminal, or may be determined by the first terminal according to information such as communication quality of the sidelink. This embodiment of the present application does not limit it.
  • the first terminal may establish a second radio resource control connection with the second network device. Conversely, if the first terminal has not received the second indication information sent by the second terminal, or the sidelink at the detection time point has been released by the second terminal, the first terminal may no longer establish a second link with the second terminal. Radio resource control connection.
  • the fact that the first terminal does not receive the second indication information sent by the second terminal may mean that the first terminal does not receive the second indication information sent by the second terminal after a second period of time after the first indication information is sent.
  • the second duration may be preset, may also be determined by agreement between the second terminal and the first terminal, or may be determined by the first terminal according to information such as communication quality of the sidelink.
  • the first terminal may establish a second radio resource control connection with the second network device.
  • the establishment of the second radio resource control connection may not depend on the execution of S330.
  • the apparatus for executing method 300 may determine the connection state of the radio resource control connection between the first terminal and the first network device, and send state indication information to the second terminal, where the state indication information includes the first state information, the second Two state information or third state information, the first state information is used to indicate that the connection state is an establishing state, the second state information is used to indicate that the connection state is an established state, and the third state The information is used to indicate that the connection state is an establishment failure state, and the first terminal is a relay device for the second terminal to access the first network device.
  • the state of being established is used to indicate that the connection is being established or that the connection is being established.
  • the radio resource control connection is being established, or the radio resource control connection is recovering (Uu-RLF recovering) when a radio link failure occurs, etc., determine that the connection state is The building state.
  • Establishment completion status used to indicate that the connection has been established or the connection has been successfully established.
  • the handover of the first terminal is completed, the establishment of the radio resource control connection is completed, or the radio link failure recovery of the radio resource control connection is completed (Uu-RLF recovered), etc., determine that the connection state is the established finished condition.
  • the establishment failure state is used to indicate that the connection establishment failed or the connection cannot be obtained.
  • the first terminal device fails to hand over (HOfailure)
  • the establishment of the radio resource control connection fails, and a radio link failure occurs in the radio resource control connection, and the restoration of the radio resource control connection in which the radio link failure occurs fails (Uu-RLF failure), or when the radio resource control connection is released, determine that the connection state is the establishment failure state.
  • the radio resource control release information when receiving radio resource control release information sent by the first network device, where the radio resource control release information is used to indicate release of the radio resource control connection, determine that the connection state is the established failed state.
  • Fig. 4 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the communication method 400 includes S410 to S460.
  • An RRC connection is established between the first terminal and the first network device.
  • the first network device may send at least one measurement event to the first terminal.
  • the first terminal detects the signals of each cell, and judges whether the detection result conforms to the at least one measurement event. If the detection result matches any measurement event, S410 may be performed.
  • the first terminal sends a measurement report to the first network device.
  • the measurement report may include measurement events satisfied by the first terminal.
  • the first network device determines that there is no session belonging to the first terminal.
  • the at least one measurement event may include at least one of measurement event A2, measurement event A3, measurement event A4, measurement event A5, measurement event A6, measurement event B1, and measurement event B2.
  • the measurement event A2 is that the signal quality of the serving cell becomes lower than the corresponding threshold.
  • the measurement event A3 is that the signal quality of the neighboring cell starts to be higher than the signal quality of the serving cell by a certain offset.
  • the measurement event A4 is that the signal quality of the neighboring cell becomes higher than the corresponding threshold.
  • Measurement event A5 is when the signal quality of the serving cell becomes lower than threshold 1 and the signal quality of the neighboring cell becomes higher than threshold 2 .
  • the measurement event A6 is that the signal quality of the neighboring cell starts to be higher than the signal quality of the secondary cell (Scell) by a certain offset.
  • the measurement event B1 is that the signal quality of an Inter-RAT neighboring cell becomes higher than a corresponding threshold.
  • the measurement event B2 is that the signal quality of the primary cell (Pcell) becomes lower than threshold 1 and the signal quality of inter-system neighboring cells becomes higher than threshold 2.
  • both the primary cell and the secondary cell are cells covered by the first network device, and are used to provide services for the first terminal.
  • the primary cell and the secondary cell correspond to different frequency bands.
  • the neighboring cell is a cell other than the serving cell, and the serving cell is a cell covered by the first network device.
  • the serving cell provides services for the first terminal.
  • the first network device may determine whether there is a session of the first terminal. When the first network device determines that there is no session of the first terminal, the first network device may release the RRC context of the first terminal, and perform S430. The first network device may release the RRC context of the first terminal, that is, the first access network device disconnects the RRC connection with the first terminal.
  • the first network device may determine whether there is a protocol data unit (protocol data unit, PDU) session belonging to the first terminal.
  • PDU protocol data unit
  • the first network device may perform S430 and disconnect the RRC connection with the first terminal.
  • the first network device sends RRC release information to the first terminal.
  • the RRC release information is used to indicate that the first network device releases the RRC connection of the first terminal.
  • the first terminal After receiving the RRC release information, the first terminal enters the RRC idle state (RRC_IDLE), and may perform any one of S440, S450, and S460.
  • RRC_IDLE RRC idle state
  • the first terminal sends sidelink release indication information to the second terminal.
  • the sidelink release instruction information is used to instruct the second terminal to disconnect the sidelink connection with the first terminal.
  • the second terminal may disconnect the sidelink connection with the first terminal. That is, the second terminal can release the context of the sidelink.
  • the second terminal may perform relay reselection or cell (re)selection. That is to say, the second terminal may re-determine the relay terminal, or the second terminal may initiate random access to the second network device and establish an RRC connection with the second network device.
  • S450 includes S451 to S453.
  • the first terminal may send Uu port RRC release information to the second terminal.
  • the Uu interface RRC release information is used to indicate that the RRC connection between the first terminal and the first network device has been disconnected.
  • the Uu interface RRC release information is used to indicate that the first network device releases the RRC context of the first terminal.
  • the second terminal may release the sidelink with the first terminal.
  • the second terminal may maintain a sidelink with the first terminal, that is, maintain a connection with the first terminal.
  • the second terminal may send side link maintenance information to the first terminal.
  • the first terminal acquires a response from the second terminal to maintain the sidelink.
  • the first terminal when the first terminal receives the sidelink maintenance information sent by the second terminal, it may be understood that the first terminal obtains a response that the second terminal maintains the sidelink.
  • a timer may be set in the first terminal.
  • the first terminal may start a timer when sending the Uu interface RRC release information. Timing ends after the first time elapses after the timer starts.
  • the first duration may be preset, may also be determined by agreement between the second terminal and the first terminal, or may be determined by the first terminal according to information such as the communication quality of the sidelink.
  • the first terminal may determine whether the sidelink link with the second terminal remains connected when the timer expires. In a case where it is determined that the side link remains connected, the first terminal obtains a response from the second terminal that the side link remains connected. That is to say, if the first terminal determines that the sidelink link with the second terminal is not disconnected at the detection time point of the preset duration after the Uu interface RRC release information is sent, the first terminal has acquired the second terminal Keep the sidelink responsive.
  • the first terminal establishes an RRC connection with the second network device.
  • the first terminal may reside in a cell covered by the second network device.
  • the second network device may be the first network device, or may be another network device other than the first network device.
  • the cell where the first terminal resides after random access may be a different cell from the serving cell of the first terminal before S410.
  • the first terminal After the first terminal establishes the RRC connection with the second network device, the first terminal, as a relay terminal of the second terminal, can relay data between the second terminal and the second network device.
  • the first terminal may release the sidelink with the second terminal.
  • S460 includes S461 to S463.
  • the first terminal may send status indication information to the second terminal.
  • the first terminal may send state indication information to the second terminal.
  • the RRC connection state between the first terminal and the network device may be any one of a connection establishment state, a connection completion state, and a connection failure state.
  • the RRC connection state between the first terminal and the first network device is a connection completed state.
  • the first network device may send RRC release information to the first terminal, and release the RRC connection with the first terminal.
  • the first terminal receives the RRC release information sent by the first network device, and may determine that the state of the RRC connection between the first terminal and the first network device has changed to a state that the connection cannot be obtained, and proceeds to S461.
  • the first terminal may detect the RRC connection state between the first terminal and the first network device after receiving the RRC release information sent by the first network device.
  • the first terminal may perform S461.
  • the first terminal acquires a response from the second terminal to maintain the sidelink.
  • the first terminal receives the side link maintenance information sent by the second terminal, or, the first terminal determines the side link between the first terminal and the second terminal at a detection time point of a preset duration after S461 sends the status indication information. If the uplink is not disconnected, the first terminal obtains a response that the second terminal maintains the sidelink. Afterwards, the first terminal may perform S463.
  • the first terminal establishes an RRC connection with the second network device.
  • the first terminal may release the sidelink with the second terminal.
  • the first terminal may not release the sidelink, and establish an RRC connection with the second network device after obtaining a response from the second terminal to maintain the sidelink.
  • Fig. 5 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the first terminal may send event information to the second terminal to indicate events related to the radio resource control connection between the first terminal and the network device . For example, after the first terminal confirms that RLF occurs in the radio resource control connection with the network device, event information may be sent to the second terminal to indicate that RLF occurs in the radio resource control connection. That is, different times may correspond to different event information.
  • the operations performed by the second terminal may be the same after receiving different event information.
  • event 1 is that the handover of the first terminal fails
  • event 2 is that RLF occurs in the radio resource control connection between the first terminal and the network device.
  • the event information corresponding to event 1 and event 2 is different.
  • the operations performed by the second terminal may both release the sidelink link with the first terminal.
  • the first terminal sends event information to the second terminal to indicate events related to the radio resource control connection between the first terminal and the network device. Since there are many events related to the radio resource control connection between the first terminal and the network device, in order to distinguish different event information, the event information needs more bits, which will lead to information redundancy.
  • this embodiment of the present application provides a communication method 500 .
  • the method 500 includes S510 to S520.
  • the connection state is the The state is being built.
  • the connection state may be determined as the establishment complete state.
  • the connection state is the establishment failure state.
  • the status indication information includes first status information, second status information, or third status information
  • the first status indication information is used to indicate that the connection status is being established state
  • the second state information is used to indicate that the connection state is an established state
  • the third state information is used to indicate that the connection state is an established failed state
  • the first terminal is the connection state of the second terminal into the relay device of the network device.
  • the operations of the second terminal may be the same for events corresponding to the connection state of the same radio resource control connection between the first terminal and the network device.
  • the first terminal sends status indication information to the second terminal to indicate the connection status of the radio resource control connection between the first terminal and the network device, and the number of connection statuses of the radio resource control connection is less than that of the radio resource control connection
  • the number of related events is connected, so that the number of bits of information can be saved, thereby avoiding redundancy of information, and making the processing between the first terminal and the second terminal more concise.
  • the first terminal may periodically or aperiodically detect the state of the radio resource control connection between the first terminal and the network device, and determine the connection state of the radio resource control connection between the first terminal and the network device, And send status indication information to the second terminal.
  • the first terminal may send status indication information to the second terminal when it is determined that the connection status of the radio resource control connection between the first terminal and the network device changes.
  • the first terminal when the first terminal receives the radio resource control release information sent by the first network device, it may determine that the connection state is the establishment failure state.
  • the radio resource control release information is used to indicate to release the radio resource control connection.
  • the radio resource control release information indicates that the connection state of the radio resource control connection changes.
  • the first terminal may establish a second radio resource control connection with the second network device, and the second radio resource control connection is used for the first network device.
  • the second terminal accesses the second network device.
  • the first terminal may establish the second radio resource control connection with the second network device after receiving the second indication information sent by the second terminal.
  • the second indication information is used to indicate to maintain the sidelink.
  • the second indication information may be understood as response information of the first indication information.
  • the first terminal may establish an RRC connection with the second network device under the condition that the sidelink is not disconnected at the detection time point, the detection time point including the first Indicates the point in time of the first elapsed time since the message was sent.
  • Fig. 6 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the communication method 600 includes S610 to S630.
  • the first network device may determine whether there is a session belonging to the first terminal between the first terminal and the first network device, and may also send the same or different RRC messages to the first terminal according to whether there is a session belonging to the first terminal. with news.
  • the first terminal is a relay device through which the second terminal accesses the first network device, and the first terminal communicates with the second terminal through a side link.
  • a first radio resource control connection exists between the first terminal and the first network device.
  • the first network device may periodically determine whether there is a session belonging to the first terminal. Alternatively, the first network device may determine whether there is a session belonging to the first terminal after receiving the indication information, where the indication information is used to instruct the first network device to determine whether there is a session belonging to the first terminal. Alternatively, the first network device may determine whether there is a session belonging to the first terminal after determining that the first terminal meets the handover condition, which is not limited in this embodiment of the present application.
  • the first network device determines whether there is a session belonging to the first terminal, it may determine whether there is a PDU session of the first terminal.
  • step S620 may be performed.
  • the first network device may not perform step S620, and maintain the first RRC connection with the first terminal. That is to say, when there is no session belonging to the first terminal, the first network device may not send an RRC reconfiguration message or handover indication information to the first terminal if the first terminal meets the handover condition, so that the second The terminal can continue to maintain a connection with the first network device through the first terminal, so as to avoid interruption of transmitted data.
  • the first network device may send a first RRC reconfiguration message (that is, a first radio resource control reconfiguration message) to the first terminal. with message).
  • the first RRC reconfiguration message includes information for indicating at least one non-measureable cell and/or at least one measurable cell covered by the first network device.
  • the at least one unmeasurable cell may be an unmeasurable cell covered by the first network device, or may be other unmeasurable cells.
  • Other non-measurable cells are non-measurable cells covered by network devices other than the first network device.
  • the information used to indicate at least one unmeasured cell in the first RRC reconfiguration message may be in the form of a blacklist of unmeasured cells, and the information used in the first RRC reconfiguration message to indicate at least one cell covered by the first network device
  • the information of the measurable cells may be in the form of a white list of measurable cells. That is to say, the first RRC reconfiguration message may include a whitelist of measurable cells and/or a blacklist of unmeasurable cells.
  • the first network device may send the second RRC reconfiguration message (that is, the second RRC reconfiguration message) to the first terminal.
  • the second RRC reconfiguration message includes information used to indicate cells covered by the first network device and/or other cells.
  • the second RRC reconfiguration message may include any one or more of the following: at least one measurement event, a whitelist of measurable cells, or a blacklist of unmeasurable cells.
  • the measurable cell whitelist in the second RRC reconfiguration message includes at least one measurable cell and/or other measurable cells covered by the first network device. Other measurable cells are measurable cells covered by network devices other than the first network device.
  • the non-measurable blacklist in the second RRC reconfiguration message includes at least one non-measurable cell, and the at least one non-measurable cell may be a non-measurable cell covered by the first network device, or may be other non-measurable cells. Other non-measurable cells are non-measurable cells covered by network devices other than the first network device.
  • At least one measurement event in the second RRC reconfiguration message may include: the signal quality of the serving cell becomes higher than the corresponding threshold; the signal quality of the serving cell becomes lower than the corresponding threshold; If the quality is high, there is a certain offset; the signal quality of the neighboring cell becomes higher than the corresponding threshold; the signal quality of the serving cell becomes lower than threshold 1 and the signal quality of the neighboring cell becomes higher than the threshold 2; the signal quality of the neighboring cell becomes higher than the signal quality of the secondary cell
  • a certain bias and the like are not limited in this embodiment of the present application.
  • the first network device may Send the first RRC reconfiguration message to the first terminal at the second moment.
  • the first moment is different from the second moment, and the first moment is earlier than the second moment.
  • the first network device may Send the second RRC reconfiguration message to the first terminal at the fourth moment.
  • the third moment is not the same as the fourth moment, and the third moment is earlier than the fourth moment.
  • the first terminal may perform signal measurement according to the first RRC reconfiguration message.
  • the first terminal may determine the signal strength of each measurable cell in the at least one measurable cell Take measurements.
  • the first terminal may not measure the signal strength of a cell included in the at least one unmeasurable cell. In this case, the first terminal may also measure the signal strength of cells other than the at least one unmeasurable cell.
  • the first terminal may perform signal measurement according to the second RRC reconfiguration message.
  • the first terminal may perform measurement according to the at least one measurement event.
  • one measurement event in the at least one measurement event may be a measurement event A3, and the first terminal may measure signal strengths of the serving cell and cells other than the serving cell.
  • the first terminal may measure the signal strength of the cells included in the white list of measurable cells.
  • the first terminal may not measure the signal strength of the cells included in the blacklist of unmeasurable cells. In this case, the first terminal may also measure the signal strength of cells other than the cells included in the blacklist of unmeasurable cells.
  • the first terminal may send the first measurement report to the first network device according to the signal quality obtained through measurement.
  • the first measurement report is determined according to the first RRC reconfiguration message or the second RRC reconfiguration message.
  • the first network device may determine whether to send handover indication information to the first terminal according to the received first measurement report from the first terminal.
  • the first network device may send the same or different RRC reconfiguration messages to the first terminal according to whether there is a session belonging to the first terminal.
  • the first RRC reconfiguration message sent by the first network device to the first terminal can keep the first terminal connected to the first network device, so that the second terminal can pass through the first terminal Data is transmitted to the first network device to avoid interruption of data transmitted by the second terminal.
  • Fig. 7 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the communication method 700 includes S710 to S740.
  • a first radio resource control connection exists between the first network device and the first terminal.
  • the first terminal is a relay device through which the second terminal accesses the first network device, and the first terminal communicates with the second terminal through a side link.
  • the first network device may periodically determine whether there is a session belonging to the first terminal.
  • the first network device may determine whether there is a session belonging to the first terminal after a preset condition is met.
  • the preset condition may include: receiving indication information, where the indication information is used to indicate whether there is a session belonging to the first terminal; or determining that the first terminal satisfies a handover condition, etc., which is not limited in this embodiment of the present application.
  • a specific implementation manner in which the first network device determines that there is no session belonging to the first terminal is similar to step S610, and will not be repeated here.
  • the first network device may send a first RRC reconfiguration message to the first terminal, where the first RRC reconfiguration message includes information indicating at least one unmeasurable cell and/or the first Information about at least one measurable cell covered by the network device.
  • the specific implementation manner of the first network device sending the first RRC reconfiguration message to the first terminal is similar to step S620, and will not be repeated here.
  • the first network device may send a second RRC reconfiguration message to the first terminal, where the second RRC reconfiguration message includes a cell used to indicate the coverage of the first network device and/or Information about other cells, where the other cells are cells other than the cell covered by the first network device.
  • the second RRC reconfiguration message includes any one or more of the following: at least one measurement event, a whitelist of measurable cells or a blacklist of unmeasurable cells.
  • the white list of measurable cells includes at least one measurable cell within or outside the coverage of the first network device, and the black list of unmeasurable cells includes at least one unmeasurable cell.
  • Step S730 the first terminal performs signal measurement according to the first RRC reconfiguration message or the second RRC reconfiguration message. Step S730 is similar to step S630 and will not be repeated here.
  • the first terminal may perform signal measurement according to the first RRC reconfiguration message or the second RRC reconfiguration message, and send a first measurement report to the first network device.
  • the first measurement report may include information used to indicate signal quality obtained through measurement by the first terminal.
  • the first measurement report may include the signal quality of each cell in the at least one measurable cell covered by the first network device.
  • the first measurement report may include signal quality of cells other than the cell included in the at least one non-measurable cell.
  • the first measurement report may include the measurement event whose measurement result matches the at least one measurement event.
  • the first measurement report may also include the target cell or target base station that makes the measurement result conform to the measurement event.
  • the target cell is a cell covered by the target base station.
  • the first measurement report may further include the signal quality of the cell involved in the at least one measurement event.
  • the first measurement report may include the signal quality of the cells included in the white list of measurable cells.
  • the first measurement report may include signal qualities of cells other than the cells included in the blacklist of unmeasurable cells.
  • the first network device may determine that the first terminal meets the handover condition, and send handover indication information to the first terminal.
  • the first network device may determine a target cell list or a target frequency point list that meets the handover condition according to the received first measurement report, And determine the first cell or the first frequency point from the target cell list or the target frequency point list.
  • the cells or frequency points included in the target cell list or the target frequency point list are the cells or frequency points covered by the first network device.
  • the first network device may send handover instruction information to the first terminal.
  • the handover instruction information is used to instruct the first terminal to handover from the current serving cell to the first cell.
  • the first cell is a cell with the best signal quality among cells that can provide services for the first terminal in the target cell list.
  • the first frequency point is the frequency point with the best signal quality among the frequency points that the corresponding cell in the target frequency point list can provide services for the first terminal.
  • the cell corresponding to the first frequency point may be the first cell.
  • the first network device may determine a list of target cells or a list of target frequency points satisfying the handover condition according to the received first measurement report.
  • the cells or frequencies included in the target cell list or target frequency list are cells or frequencies covered by the first network device, or may be cells or frequencies covered by network devices other than the first network device.
  • the first network device may also determine the first cell or the first frequency point from the target cell list or the target frequency point list.
  • the first cell may be a cell covered by the first network device, or may be a cell covered by a network device other than the first network device.
  • the first cell is a cell with the best signal quality among cells that can provide services for the first terminal in the target cell list.
  • the first frequency point is the frequency point with the best signal quality among the frequency points that the corresponding cell in the target frequency point list can provide services for the first terminal.
  • the cell corresponding to the first frequency point may be the first cell.
  • the first network device may send handover instruction information to the first terminal, where the handover instruction information is used to instruct the first terminal to switch from the current serving cell to the first cell .
  • the first network device may send a handover request message to the second network device, Therefore, the first terminal is assisted in handover from the current serving cell to the first cell covered by the second network device.
  • the first terminal may establish a second RRC connection with the second network device.
  • the first terminal may relay data between the second terminal and the second network device.
  • the first terminal may reside in a cell covered by the second network device.
  • the process of handing over the first terminal from the current serving cell to the first cell may be a coverage-based intra-frequency handover process, or may be a coverage-based inter-frequency handover process.
  • the process for the first terminal to switch from the current serving cell to the first cell is as follows Coverage-based intra-frequency handover.
  • the first network device may send a first RRC reconfiguration message to the first terminal when it is determined that there is no session belonging to the first terminal.
  • the first RRC reconfiguration message includes information for indicating at least one non-measureable cell and/or at least one measurable cell covered by the first network device.
  • the first network device may send the second RRC reconfiguration message to the first terminal when determining that there is a session belonging to the first terminal.
  • the second RRC reconfiguration message includes any one or more of the following: at least one measurement event, a whitelist of measurable cells or a blacklist of unmeasurable cells.
  • the second RRC reconfiguration message may include measurement event A3.
  • the first terminal may perform signal measurement according to the first RRC reconfiguration message or the second RRC reconfiguration message.
  • the first terminal may send the first measurement report to the first network device.
  • the first measurement report is determined according to the first RRC reconfiguration message or the second RRC reconfiguration message.
  • the first measurement report may include at least one target cell or target frequency satisfying the measurement event A3.
  • the first network device may generate a target cell list or a target frequency point list according to the first measurement report.
  • the first network device may determine the first cell from a target cell list or a target frequency point list.
  • the first cell is a cell covered by the first network device.
  • the first cell may be a cell covered by the first network device, or may be a cell covered by a network device other than the first network device.
  • the process of switching the first terminal from the current serving cell to the first cell is based on coverage frequency switching.
  • the first network device may receive the second measurement report from the first terminal before performing S710. That is to say, method 700 may also include S701.
  • the first terminal sends a second measurement report to the first network device.
  • the second measurement report includes information indicating the signal quality obtained by the first terminal measurement.
  • the second measurement report may be determined according to RRC configuration information recently received by the first terminal.
  • the RRC configuration information recently received by the first terminal includes any of the following: RRC configuration information received when the first terminal establishes a connection with the first network device, a first RRC reconfiguration message, or a second RRC reconfiguration message.
  • the RRC configuration information received when the first terminal establishes a connection with the first network device may include at least one measurement event.
  • the RRC configuration information recently received by the first terminal is the RRC configuration information received when the first terminal establishes a connection with the first network device
  • the RRC configuration information received when the first terminal establishes a connection with the first network device includes the measurement event A2
  • the second measurement report may include reference signal receiving power (reference signal receiving power, RSRP) or reference signal receiving quality (reference signal receiving quality, RSRQ) satisfy the information of measurement event A2.
  • the second cell or the second frequency point may be a cell or a frequency point covered by the first network device, or may be a cell or a frequency point covered by a network device other than the first network device.
  • the second measurement report may be similar to the first measurement report.
  • the first network device may determine whether there is a session belonging to the first terminal after receiving the second measurement report from the first terminal. Alternatively, the first network device may periodically determine whether there is a session belonging to the first terminal, etc., which is not limited in this embodiment of the present application.
  • the first network device may send a first RRC reconfiguration message to the first terminal when it is determined that there is no session belonging to the first terminal.
  • the first RRC reconfiguration message includes information for indicating at least one non-measureable cell and/or at least one measurable cell covered by the first network device.
  • the first network device may send the second RRC reconfiguration message to the first terminal when determining that there is a session belonging to the first terminal.
  • the second RRC reconfiguration message includes any one or more of the following: at least one measurement event, a whitelist of measurable cells or a blacklist of unmeasurable cells.
  • the second RRC reconfiguration message may include measurement event A5 and measurement event A1, or the second RRC reconfiguration message may include measurement event A3 and measurement event A1.
  • the measurement event A1 is that the signal quality of the serving cell becomes higher than the corresponding threshold.
  • the first network device when receiving the second measurement report and determining that there is a session belonging to the first terminal, may, according to the cell or frequency point involved in the second measurement report The configuration information determines the specific content of the second RRC reconfiguration message.
  • the first network device may, according to the second cell or the configuration information of the second frequency point, and determine at least one measurement event included in the second RRC reconfiguration message.
  • the second RRC reconfiguration message may include measurement event A5 and measurement event A1. If the configuration information of the second cell or the second frequency point is event A3, the second RRC reconfiguration message may include measurement event A3 and measurement event A1.
  • the configuration information of the second cell or the second frequency point may be information stored in the first network device.
  • the configuration information of the second cell or the second frequency point may be information sent by the first terminal to the first network device, which is not limited in this embodiment of the present application.
  • the first terminal may perform signal measurement according to the first RRC reconfiguration message or the second RRC reconfiguration message.
  • the first terminal may send the first measurement report to the first network device.
  • the first measurement report is determined according to the first RRC reconfiguration message or the second RRC reconfiguration message.
  • the first measurement report may include at least one target cell or target frequency that meets measurement event A5 and measurement event A1.
  • the first network device may generate a target cell list or a target frequency point list according to the first measurement report.
  • the first network device may determine the first cell from a target cell list or a target frequency point list.
  • the first cell is a cell covered by the first network device.
  • the first cell may be a cell covered by the first network device, or may be a cell covered by a network device other than the first network device.
  • the first network device when the first network device receives the second measurement report from the first terminal and determines that there is no session belonging to the first terminal, it may not report to the first terminal Sending a first RRC reconfiguration message, and maintaining the first RRC connection with the first terminal. In this case, the second terminal may continue to maintain a connection with the first network device through the first terminal, thereby avoiding interruption of transmitted data.
  • the first network device may send a second RRC reconfiguration message to the first terminal when there is a session belonging to the first terminal, so that the first terminal can perform signal measurement according to the second RRC reconfiguration message to determine whether there is a signal quality deterioration nice neighborhood.
  • the first network device may also send a first RRC reconfiguration message to the first terminal when there is no session belonging to the first terminal, so that the first terminal remains connected to the first network device, thereby avoiding interruption of data transmitted by the second terminal .
  • Fig. 8 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device 800 includes a receiving module 810 and a sending module 820 .
  • the receiving module 810 is configured to receive radio resource control release information sent by the first network device, where the radio resource control release information is used to indicate release of the first radio resource control connection between the first terminal and the first network device.
  • the first terminal may include the apparatus 800 .
  • the sending module 820 is configured to send first indication information to the second terminal, the first terminal is a relay device for the second terminal to access the first network device, and the first indication information is used for Instructing to release the sidelink between the first terminal and the second terminal, or indicating that the first radio resource control connection is released, or indicating that the first radio resource control connection is released The status of the connection is failed.
  • the communication apparatus 800 further includes an establishing module, configured to establish a second radio resource control connection with a second network device, where the second radio resource control connection is used for the second terminal to access the first 2. Network equipment.
  • an establishing module configured to establish a second radio resource control connection with a second network device, where the second radio resource control connection is used for the second terminal to access the first 2. Network equipment.
  • the receiving module 810 is further configured to receive second indication information sent by the second terminal, where the second indication information is used to indicate to maintain the sidelink.
  • the establishing module is specifically configured to establish an RRC connection with the second network device when the sidelink is not disconnected at a detection time point, the detection time point including the first A point in time indicating the first period of time after the information is sent.
  • the radio resource control release information is when the first terminal meets a handover condition and there is no session belonging to the first terminal between the first terminal and the first network device Received.
  • the communications apparatus 800 further includes a processing module, where the processing module is configured to determine a connection state of the first radio resource control connection.
  • the sending module 820 is further configured to send status indication information to the second terminal, where the status indication information includes first status information, second status information, or third status information, and the first status information is used to indicate the connection status It is a state of being established, the second state information is used to indicate that the connection state is a state of establishment completion, and the third state information is used to indicate that the state of the connection is a state of establishment failure.
  • the processing module is specifically configured to, when the first terminal is handing over, the first radio resource control connection is being established, or the first radio resource control connection is recovering from a radio link failure Next, determine that the connection state is the establishing state.
  • the processing module is specifically configured to determine the connection state when the handover of the first terminal is completed, the establishment of the first radio resource control connection is completed, or the recovery of the radio link failure of the first radio resource control connection is completed. Completed status for the build.
  • the processing module is specifically configured to: when the handover of the first terminal device fails, the establishment of the first radio resource control connection fails, and a radio link failure occurs in the first radio resource control connection, the radio link failure occurs in the first terminal device. If the recovery of the first radio resource control connection fails, or the first radio resource control connection is released, determine that the connection state is the establishment failure state.
  • Fig. 9 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device 900 includes a processing module 910 and a transceiver module 920 .
  • the processing module 910 is configured to determine a connection state of the first radio resource control connection between the first terminal and the first network device.
  • the communication device 900 may be located in the first terminal.
  • the transceiver module 920 is configured to send status indication information to the second terminal, where the status indication information includes first status information, second status information, or third status information, and the first status information is used to indicate that the connection status is The state of being established, the second state information is used to indicate that the connection state is an established state, the third state information is used to indicate that the connection state is a state of establishment failure, and the first terminal is the second The terminal accesses the relay device of the first network device.
  • the processing module 910 is specifically configured to, when the first terminal is handing over, the first radio resource control connection is being established, or the first radio resource control connection is recovering from a radio link failure In other cases, it is determined that the connection state is the establishing state.
  • the processing module 910 is specifically configured to, when the handover of the first terminal is completed, the establishment of the first radio resource control connection is completed, or the restoration of the radio link failure of the first radio resource control connection is completed, determine the connection The state is the establishment complete state.
  • the processing module 910 is specifically configured to, when the handover of the first terminal device fails, the establishment of the first radio resource control connection fails, and a radio link failure occurs in the first radio resource control connection, all radio link failures in the first radio resource control connection fail If the recovery of the first radio resource control connection fails, or the first radio resource control connection is released, determine that the connection state is the establishment failure state.
  • the processing module 910 is specifically configured to, when receiving the radio resource control release information sent by the first network device, determine that the connection state is the establishment failure state, and the radio resource control release information uses Instructing to release the first RRC connection.
  • the processing module 910 is further configured to establish a second radio resource control connection with a second network device, where the second radio resource control connection is used for the second terminal to access the second network device .
  • the transceiving module 920 is configured to: the method further includes: receiving second indication information sent by the second terminal, where the second indication information is used to indicate to maintain the sidelink.
  • the processing module 910 is specifically configured to establish an RRC connection with the second network device if the sidelink is not disconnected at a detection time point, where the detection time point includes the A time point of the first duration after the sending of the first indication information.
  • the processing module 910 is specifically configured to, the radio resource control release information is when the first terminal meets the handover condition, and there is no network device belonging to the first terminal between the first terminal and the first network device. received in the context of a terminal session.
  • the transceiver module 920 may receive the first radio resource control reconfiguration message from the first network device when there is no session belonging to the first terminal between the first terminal and the first network device, or When there is a session belonging to the first terminal, a second radio resource control reconfiguration message from the first network device is received.
  • the transceiver module 920 may also send the first measurement report or the second measurement report to the first network device.
  • the transceiver module 920 may execute step S620 in the method in FIG. 6 or steps S701, S720, and S740 in the method in FIG. 7 .
  • the processing module 910 may perform signal measurement according to the first RRC reconfiguration message or the second RRC reconfiguration message.
  • the processing module 910 may execute step S630 in the method of FIG. 6 , or step S730 in the method of FIG. 7 .
  • the transceiving module 920 may also send the second measurement report to the first network device before receiving the first RRC reconfiguration message or the second RRC reconfiguration message from the first network device.
  • the second measurement report includes information used to indicate the quality of the signal obtained through measurement by the first terminal.
  • Fig. 10 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device 1000 includes a processing module 1010 and a transceiver module 1020 .
  • the processing module 1010 is configured to determine that the first terminal meets the handover condition, and there is no session belonging to the first terminal between the first terminal and the first network device.
  • the first terminal is a relay device for the second terminal to access the first network device, and a first radio resource control connection exists between the first terminal and the first network device.
  • the transceiver module 1020 is configured to send radio resource control release information to the first terminal.
  • the radio resource control release information is used to indicate to release the first radio resource control connection between the first terminal and the first network device.
  • the transceiver module 1020 is further configured to receive a measurement report from the first terminal.
  • the measurement report includes information used to indicate the quality of the signal obtained through measurement by the first terminal.
  • the processing module 1010 is further configured to determine that the first terminal meets the handover condition according to the received measurement report from the first terminal.
  • the processing module 1010 may also be configured to release the first radio resource control connection between the first terminal and the first network device.
  • the processing module 1010 may determine whether a session belonging to the first terminal exists between the first terminal and the first network device, and the first terminal is a relay device for the second terminal to access the first network device.
  • the processing module 1010 may execute step S610 in the method of FIG. 6 or step S710 in the method of FIG. 7 .
  • the transceiver module 1020 may send the first radio resource control reconfiguration message to the first terminal when there is no session belonging to the first terminal, and may also send the first radio resource control reconfiguration message to the first terminal when there is a session belonging to the first terminal.
  • the terminal sends the second radio resource control reconfiguration message.
  • the transceiver module 1020 may also receive the first measurement report or the second measurement report from the first terminal.
  • the transceiver module 1020 may execute step S620 in the method of FIG. 6 , or steps S701, S720, and S740 in the method of FIG. 7 .
  • the processing module 1010 may also determine that the first terminal meets the handover condition according to the second measurement report.
  • Fig. 11 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device 2000 includes at least one processor 2010 and a communication interface 2020 .
  • the communication interface 2020 is used for the terminal to perform information exchange with other communication devices, and when the program instructions are executed in the at least one processor, the terminal executes the communication method described above.
  • the first terminal may include the communication device 2000 .
  • At least one processor 2010 may be configured to use the communication interface 2020 to receive radio resource control release information sent by the first network device, where the radio resource control release information is used to indicate the release of the first terminal A first radio resource control connection with the first network device.
  • At least one processor 2010 may also be configured to use the communication interface 2020 to send first indication information to the second terminal, where the first terminal is a relay device for the second terminal to access the first network device
  • the first indication information is used to indicate to release the sidelink between the first terminal and the second terminal, or to indicate that the first radio resource control connection is released, or to indicate that the first radio resource control connection is released, or to indicate that the first terminal is released. Indicating that the state of the first radio resource control connection is a connection failure state.
  • At least one processor 2010 is further configured to establish a second radio resource control connection with a second network device, where the second radio resource control connection is used for the second terminal to access the second Internet equipment.
  • At least one processor 2010 is further configured to, by using the communication interface 2020, receive second indication information sent by the second terminal, where the second indication information is used to indicate to maintain the sidelink.
  • At least one processor 2010 is specifically configured to establish an RRC connection with the second network device when the sidelink is not disconnected at a detection time point, the detection time point comprising A time point of a first duration after the sending of the first indication information.
  • the radio resource control release information is when the first terminal meets a handover condition and there is no session belonging to the first terminal between the first terminal and the first network device Received.
  • At least one processor 2010 is specifically configured to determine the connection state of the first radio resource control connection.
  • At least one processor 2010 is further configured to use the communication interface 2020 to send status indication information to the second terminal, where the status indication information includes first status information, second status information, or third status information, and the first status information
  • the status indication information includes first status information, second status information, or third status information, and the first status information
  • the second state information is used to indicate that the connection state is an establishment state
  • the third state information is used to indicate that the connection state is an establishment failure state.
  • At least one processor 2010 is specifically configured to, when the first terminal is handing over, the first radio resource control connection is being established, or the first radio resource control connection where a radio link failure occurs is being In the case of recovery, it is determined that the connection state is the establishing state.
  • At least one processor 2010 is specifically configured to determine that the The connection state is the establishment complete state.
  • At least one processor 2010 is specifically configured to, when the handover of the first terminal device fails, the establishment of the first radio resource control connection fails, the radio link failure occurs in the first radio resource control connection, and the radio link failure occurs in the first radio resource control connection. If the recovery of the first radio resource control connection fails, or the first radio resource control connection is released, determine that the connection state is the establishment failure state.
  • At least one processor 2010 is configured to determine a connection state of the first radio resource control connection between the first terminal and the first network device.
  • the communication interface 2020 is configured to send status indication information to the second terminal, where the status indication information includes first status information, second status information, or third status information, and the first status information is used to indicate that the connection status is The state of being established, the second state information is used to indicate that the connection state is an established state, the third state information is used to indicate that the connection state is a state of establishment failure, and the first terminal is the second The terminal accesses the relay device of the first network device.
  • the at least one processor is specifically configured to 2010, when the first terminal is being handed over, the first radio resource control connection is being established, or the first radio resource control connection is being established when a radio link failure occurs In the case of recovery, it is determined that the connection state is the establishing state.
  • the at least one processor 2010 is specifically configured to, when the handover of the first terminal is completed, the establishment of the first radio resource control connection is completed, or the restoration of the radio link failure of the first radio resource control connection is completed, determine the The connection state is the establishment completion state.
  • the at least one processor 2010 is specifically configured to, when the handover of the first terminal device fails, the establishment of the first radio resource control connection fails, the radio link failure occurs in the first radio resource control connection, and the radio link failure occurs in the first radio resource control connection. If the recovery of the first radio resource control connection fails, or the first radio resource control connection is released, determine that the connection state is the establishment failure state.
  • the at least one processor is specifically configured to 2010, when receiving the radio resource control release information sent by the first network device, determine that the connection state is the establishment failure state, and the radio resource control release The information is used to indicate to release the first radio resource control connection.
  • At least one processor 2010 is specifically configured to establish a second radio resource control connection with a second network device, where the second radio resource control connection is used for the second terminal to access the second Internet equipment.
  • the communication interface 2020 is further configured to: the method further includes: receiving second indication information sent by the second terminal, where the second indication information is used to indicate to maintain the sidelink.
  • At least one processor 2010 is specifically configured to establish an RRC connection with the second network device if the sidelink is not disconnected at a detection time point, and the detection time point includes A time point of a first duration after the sending of the first indication information.
  • the radio resource control release information is when the first terminal meets a handover condition and there is no session belonging to the first terminal between the first terminal and the first network device Received.
  • At least one processor 2010 may be configured to, by using the communication interface 2020, receive a second session from the first network device when there is no session belonging to the first terminal between the first terminal and the first network device.
  • a RRC reconfiguration message may be configured to, by using the communication interface 2020, receive a second session from the first network device when there is no session belonging to the first terminal between the first terminal and the first network device.
  • At least one processor 2010 may be further configured to, by using the communication interface 2020, receive a second radio resource control reconfiguration message from the first network device when there is a session belonging to the first terminal.
  • At least one processor 2010 may be further configured to perform signal measurement according to the first radio resource control reconfiguration message or the second radio resource control reconfiguration message.
  • At least one processor 2010 may be further configured to, by using the communication interface 2020, send the first measurement report or the second measurement report to the first network device.
  • At least one processor 2010 may also be configured to establish a second RRC connection with the second network device.
  • the second radio resource control connection is used for the second terminal to access the second network device.
  • Fig. 12 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device 3000 includes at least one processor 3010 and a communication interface 3020 .
  • the communication interface 3020 is used for the communication device to exchange information with other communication devices, and when the program instructions are executed in the at least one processor, the communication device executes the aforementioned communication method.
  • the first network device may include a communication apparatus 3000 .
  • At least one processor 3010 may be configured to determine that the first terminal meets the handover condition, and there is no session belonging to the first terminal between the first terminal and the first network device.
  • the first terminal is a relay device for the second terminal to access the first network device, and a first radio resource control connection exists between the first terminal and the first network device.
  • At least one processor 3010 may be further configured to, by using the communication interface 3020, send radio resource control release information to the first terminal.
  • the radio resource control release information is used to indicate to release the first radio resource control connection between the first terminal and the first network device.
  • At least one processor 3010 may also be configured to, by using the communication interface 3020, receive a measurement report from the first terminal.
  • the measurement report includes information used to indicate the quality of the signal obtained through measurement by the first terminal.
  • At least one processor 3010 may be further configured to, according to the received measurement report from the first terminal, determine that the first terminal meets the handover condition.
  • At least one processor 3010 may be further configured to release the first radio resource control connection between the first terminal and the first network device.
  • At least one processor 3010 may be configured to determine whether there is a session belonging to the first terminal between the first terminal and the first network device, where the first terminal is a medium for the second terminal to access the first network device relay device.
  • At least one processor 3010 may be further configured to, by using the communication interface 3020, send a first radio resource control reconfiguration message to the first terminal when there is no session belonging to the first terminal.
  • At least one processor 3010 may be further configured to, by using the communication interface 3020, send a second radio resource control reconfiguration message to the first terminal when there is a session belonging to the first terminal.
  • At least one processor 3010 may be further configured to, by using the communication interface 3020, receive the first measurement report or the second measurement report from the first terminal.
  • An embodiment of the present application further provides a communication system, including the aforementioned first terminal, second terminal, and first network device.
  • the communication system may further include a second network device.
  • An embodiment of the present application further provides a computer program storage medium, wherein the computer program storage medium has program instructions, and when the program instructions are executed, the foregoing method is executed.
  • An embodiment of the present application further provides a system-on-a-chip, wherein the system-on-a-chip includes at least one processor, and when program instructions are executed on the at least one processor, the foregoing method is executed.
  • the processor in the embodiment of the present application may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories.
  • the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory can be random access memory (RAM), which acts as external cache memory.
  • RAM random access memory
  • static random access memory static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory Access memory
  • SDRAM synchronous dynamic random access memory
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • serial link DRAM SLDRAM
  • direct memory bus random access memory direct rambus RAM, DR RAM
  • the above-mentioned embodiments may be implemented in whole or in part by software, hardware, firmware or other arbitrary combinations.
  • the above-described embodiments may be implemented in whole or in part in the form of computer program products.
  • the computer program product comprises one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center that includes one or more sets of available media.
  • the available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media.
  • the semiconductor medium may be a solid state drive.
  • At least one means one or more, and “multiple” means two or more.
  • At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items.
  • at least one item (piece) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple .
  • sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the functions are realized in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

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Abstract

本申请公开了一种通信方法、通信设备和通信系统，能够避免远程终端传输的数据中断。该方法包括：接收第一网络设备发送的无线资源控制释放信息，无线资源控制释放信息用于指示释放第一终端与第一网络设备之间的第一无线资源控制连接；向第二终端发送第一指示信息，第一终端为第二终端接入第一网络设备的中继设备，第一指示信息用于指示释放第一终端与第二终端之间的侧行链路，或者，用于指示第一无线资源控制连接被释放，或者，用于指示第一无线资源控制连接的状态为连接失败状态。

Description

通信方法、通信装置与通信系统
本申请要求于2022年1月10日提交中国专利局、申请号为202210023783.X、申请名称为“通信方法、通信装置与通信系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
本申请要求于2022年5月27日提交中国专利局、申请号为202210585646.5、申请名称为“通信方法、通信装置与通信系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，并且更具体地，涉及一种通信方法、通信装置与通信系统。
背景技术
中继(relay)终端可以作为中继设备对远程(remote)终端与网络设备之间传输的数据进行中继。在一些情况下，网络设备可以释放中继终端与网络设备之间的无线资源控制(radio resource control，RRC)连接。这种情况可能导致远端终端传输的数据中断。
发明内容
本申请提供一种通信方法、通信装置和通信系统，能够避免远端终端传输的数据中断。
第一方面，提供了一种通信方法，包括：接收第一网络设备发送的无线资源控制释放信息，所述无线资源控制释放信息用于指示释放第一终端与所述第一网络设备之间的第一无线资源控制连接；向所述第二终端发送第一指示信息，所述第一终端为所述第二终端接入所述第一网络设备的中继设备，所述第一指示信息用于指示以下信息中的至少一个：释放所述第一终端与所述第二终端之间的侧行链路，用于指示所述第一无线资源控制连接被释放，用于指示所述第一无线资源控制连接的状态为连接失败状态。
在作为中继设备的第一终端与所述第一网络设备之间的第一无线资源控制连接被释放的情况下，第一终端向作为远程设备的第二终端发送的第一指示信息。从而，远程终端能够根据第一指示信息进行后续处理，避免远程终端传输的数据中断。
在一些可能的实现方式中，所述方法还包括：建立与第二网络设备之间的第二无线资源控制连接，所述第二无线资源控制连接用于所述第二终端接入所述第二网络设备。
在作为中继设备的第一终端与所述第一网络设备之间的第一无线资源控制连接被释放的情况下，第一终端建立与第二网络设备之间的第二无线资源控制连接，从而使得所述第二终端通过第二无线资源控制连接接入所述第二网络设备，能够避免第二终端传输的数据中断。
在一些可能的实现方式中，所述方法还包括：接收所述第二终端发送的第二指示信息，所述第二指示信息用于指示保持所述侧行链路。
第一终端在接收第二终端发送的用于指示保持所述侧行链路的第二指示信息的情况 下，建立与第二网络设备之间的第二无线资源控制连接。也就是说，第二无线资源控制连接的建立是依赖于第二终端对第一指示信息发出的保持侧行链路的响应进行的，避免无效的情况下建立第二无线资源控制连接，降低对资源的占用。
在一些可能的实现方式中，所述建立与第二网络设备之间的第二无线资源控制连接，包括：所述侧行链路在检测时间点未断开的情况下，建立与所述第二网络设备之间的RRC连接，所述检测时间点包括所述第一指示信息发送后第一时长的时间点。
侧行链路在检测时间点未断开，可以理解为第二终端对第一指示信息做出的保持侧行链路的响应。也就是说，第二无线资源控制连接的建立是依赖于第二终端对第一指示信息发出的保持侧行链路的响应进行的，避免无效的情况下建立第二无线资源控制连接，降低对资源的占用。
在一些可能的实现方式中，所述方法还包括：所述无线资源控制释放信息是在所述第一终端满足切换条件，且所述第一终端与所述第一网络设备之间不存在属于所述第一终端的会话的情况下接收的。
切换条件例如可以是满足至少一个测量事件。第一终端与第一网络设备建立RRC连接之后，第一网络设备可以向第一终端发送至少一个测量事件。第一终端设备可以周期性或非周期性进行测量。在满足该至少一个测量事件中的任一个或多个的情况下，第一终端可以向第一网络设备发送测量报告。第一网络设备在接收测量报告的情况下，即可确定满足切换条件。
第一网络设备可以向第一终端发送至少一个测量事件可以包括以下事件中的一种或多种：服务小区信号质量变得低于对应门限；邻区信号质量开始比服务小区信号质量高一定偏置；邻区信号质量变得高于对应门限；服务小区信号质量变得低于门限1并且邻区信号质量变得高于门限2；邻区信号质量开始比辅小区(secondary cell，Scell)信号质量高一定偏置；异系统(inter radio access technology，Inter-RAT)邻区信号质量变得高于对应门限；主小区(primary cell，Pcell)信号质量变得低于门限1并且异系统邻区信号质量变得高于门限2。
第一终端满足切换条件，且所述第一终端与所述第一网络设备之间不存在属于所述第一终端的会话的情况下，第一网络设备可以向第一终端发送无线资源控制释放信息，并释放与第一终端之间的第一无线资源控制连接。
在一些可能的实现方式中，所述方法还包括：确定所述第一无线资源控制连接的连接状态；向第二终端发送状态指示信息，所述状态指示信息包括第一状态信息、第二状态信息或第三状态信息，所述第一状态信息用于指示所述连接状态为正在建立状态、所述第二状态信息用于指示所述连接状态为建立完成状态、所述第三状态信息用于指示所述连接状态为建立失败状态。
第一终端向第二终端发送状态指示信息，以指示第一无线资源控制连接的连接状态，从而无需对第一无线资源控制连接相关的事件进行指示，降低信息的冗余度。
应当理解，在第一终端建立与第二网络设备的第二无线资源控制连接之后，第一终端可以向第二终端发送状态指示信息，以指示第二无线资源控制连接的连接状态。也就是说，状态指示信息用于指示第一终端与为第一终端服务的网络设备之间的无线资源控制连接。
在一些可能的实现方式中，所述确定所述第一无线资源控制连接的连接状态，包括：在所述第一终端正在切换，所述第一无线资源控制连接正在建立，或对发生无线链路失败 的所述第一无线资源控制连接正在恢复的情况下，确定所述连接状态为所述正在建立状态；在所述第一终端完成切换，所述第一无线资源控制连接建立完成，或所述第一无线资源控制连接无线链路失败恢复完成的情况下，确定所述连接状态为所述建立完成状态；在所述第一终端设备切换失败，所述第一无线资源控制连接建立失败，所述第一无线资源控制连接发生无线链路失败，对发生无线链路失败的所述第一无线资源控制连接进行恢复失败，或所述第一无线资源控制连接被释放的情况下，确定所述连接状态为所述建立失败状态。
对于多种与第一无线资源控制连接相关的事件，在使得第一终端与网络设备之间的无线资源控制连接的状态相同的情况下，可以利用相同信息进行指示，从而可以减小信息所需的比特数，降低了信息的冗余度。
第二方面，提供一种通信方法，所述方法包括：确定第一终端与第一网络设备之间的第一无线资源控制连接的连接状态；向第二终端发送状态指示信息，所述状态指示信息包括第一状态信息、第二状态信息或第三状态信息，所述第一状态信息用于指示所述连接状态为正在建立状态、所述第二状态信息用于指示所述连接状态为建立完成状态、所述第三状态信息用于指示所述连接状态为建立失败状态，所述第一终端为所述第二终端接入所述第一网络设备的中继设备。
第一终端向第二终端发送状态指示信息，以指示第一无线资源控制连接的连接状态，从而无需对第一无线资源控制连接相关的事件进行指示，降低信息的冗余度。
在一些可能的实现方式中，所述确定第一终端与第一网络设备之间的第一无线资源控制连接的连接状态，包括：在所述第一终端正在切换，所述第一无线资源控制连接正在建立，或对发生无线链路失败的所述第一无线资源控制连接正在恢复的情况下，确定所述连接状态为所述正在建立状态；在所述第一终端完成切换，所述第一无线资源控制连接建立完成，或所述第一无线资源控制连接无线链路失败恢复完成的情况下，确定所述连接状态为所述建立完成状态；在所述第一终端设备切换失败，所述第一无线资源控制连接建立失败，所述第一无线资源控制连接发生无线链路失败，对发生无线链路失败的所述第一无线资源控制连接进行恢复失败，或所述第一无线资源控制连接被释放的情况下，确定所述连接状态为所述建立失败状态。
在一些可能的实现方式中，所述确定第一终端与第一网络设备之间的第一无线资源控制连接的连接状态，包括：在接收所述第一网络设备发送的无线资源控制释放信息的情况下，确定所述连接状态为所述建立失败状态，所述无线资源控制释放信息用于指示释放所述第一无线资源控制连接。
在一些可能的实现方式中，所述方法还包括：建立与第二网络设备之间的第二无线资源控制连接，所述第二无线资源控制连接用于所述第二终端接入所述第二网络设备。
在一些可能的实现方式中，所述方法还包括：接收所述第二终端发送的第二指示信息，所述第二指示信息用于指示保持所述侧行链路。
在一些可能的实现方式中，所述建立与第二网络设备之间的第二无线资源控制连接，包括：所述侧行链路在检测时间点未断开的情况下，建立与所述第二网络设备之间的RRC连接，所述检测时间点包括所述第一指示信息发送后第一时长的时间点。
在一些可能的实现方式中，所述无线资源控制释放信息是在所述第一终端满足切换条件，且所述第一终端与所述第一网络设备之间不存在属于所述第一终端的会话的情况下接收的。
第三方面，提供了一种通信方法。该方法包括：确定第一终端满足切换条件，且第一终端与第一网络设备之间不存在属于第一终端的会话，第一终端为第二终端接入第一网络设备的中继设备，第一终端与第一网络设备之间存在第一无线资源控制连接；向第一终端发送无线资源控制释放信息，无线资源控制释放信息用于指示释放第一终端与第一网络设备之间的第一无线资源控制连接。
第一网络设备可以在确定第一终端满足切换条件，并且不存在属于第一终端的会话时，指示第一终端释放无线资源控制连接，从而可以使第一终端向第二终端发送第一指示信息，进而使第二终端可以根据第一指示信息进行后续处理，避免第二终端传输的数据中断。
在一些可能的实现方式中，该方法还包括：接收来自于第一终端的测量报告，测量报告包括用于指示第一终端测量获得的信号质量的信息；根据测量报告，确定第一终端满足切换条件。
第一网络设备可以通过来自于第一终端的测量报告，确定第一终端是否满足切换条件，从而确定是否需要向第一终端发送切换指示信息。
在一些可能的实现方式中，该方法还包括：释放第一终端与第一网络设备之间的第一无线资源控制连接。
第一网络设备可以在向第一终端发送无线资源控制释放信息后，释放与第一终端之间的第一无线资源控制连接。
第四方面，提供了一种通信方法。该方法包括：确定第一终端与第一网络设备之间是否存在属于第一终端的会话，第一终端为第二终端接入第一网络设备的中继设备；在不存在属于第一终端的会话时，向第一终端发送第一无线资源控制重配消息，第一无线资源控制重配消息包括用于指示至少一个不可测量小区和/或第一网络设备覆盖的至少一个可测量小区的信息。
第一网络设备可以在不存在属于第一终端的会话时，指示第一终端仅测量该第一网络设备覆盖的小区，从而使第一终端可以从当前的服务小区切换至第一网络设备覆盖的信号质量更好的小区，避免第二终端通过第一终端传输的数据中断。
在一些可能的实现方式中，该方法还包括：在存在属于第一终端的会话时，向第一终端发送第二无线资源控制重配消息，第二无线资源控制重配消息包括用于指示第一网络设备覆盖的小区和/或其他小区的信息，其他小区为第一网络设备覆盖的小区外的小区。
第一网络设备可以在存在属于第一终端的会话时，向第一终端发送第二无线资源控制重配消息，从而使第一终端可以根据第二无线资源控制重配消息进行信号测量，确定是否存在信号质量更好的小区。
在一些可能的实现方式中，第二无线资源控制重配消息包括以下任一项或多项：至少一个测量事件、可测量小区白名单或不可测量小区黑名单，可测量小区白名单包括第一网络设备的覆盖范围内或覆盖范围外的至少一个可测量小区，不可测量小区黑名单包括至少一个不可测量小区。
第一网络设备可以通过向第一终端发送第二无线资源控制重配消息，从而在存在属于第一终端的会话时，使第一终端可以切换至信号质量更好的网络。
在一些可能的实现方式中，该方法还包括：接收来自于第一终端的第一测量报告，第一测量报告根据第一无线资源控制重配消息或第二无线资源控制重配消息确定。
第一网络设备可以向第一终端发送不同的无线资源控制重配消息，还可以接收来自于 第一终端的第一测量报告，从而可以确定是否需要向第一终端发送切换指示信息。
在一些可能的实现方式中，该方法还包括：接收来自于第一终端的第二测量报告，第二测量报告包括用于指示第一终端测量获得的信号质量的信息；根据第二测量报告，确定第一终端满足切换条件。
第一网络设备可以根据来自于第一终端的第二测量报告，确定第一终端是否满足切换条件，从而确定是否需要向第一终端发送切换指示信息。第一网络设备还可以在接收到该第二测量报告后确定是否存在属于第一终端的会话，从而向第一终端发送第一无线资源控制重配消息或第二无线资源控制重配消息。
第五方面，提供了一种通信方法。该方法包括：在第一终端与第一网络设备之间不存在属于第一终端的会话时，接收来自于第一网络设备的第一无线资源控制重配消息，第一无线资源控制重配消息包括用于指示至少一个不可测量小区和/或第一网络设备覆盖的至少一个可测量小区的信息，第一终端为第二终端接入第一网络设备的中继设备；根据第一无线资源控制重配消息，进行信号测量。
第一终端可以在不存在属于第一终端的会话时，根据第一无线资源控制重配消息进行信号测量，从而可以避免与第一网络设备的连接中断，导致第二终端无法通过第一终端向第一网络设备传输数据。
在一些可能的实现方式中，在存在属于第一终端的会话时，接收来自于第一网络设备的第二无线资源控制重配消息，第二无线资源控制重配消息包括用于指示第一网络设备覆盖的小区和/或其他小区的信息，其他小区为第一网络设备覆盖的小区外的小区；根据第二无线资源控制重配消息，进行信号测量。
第一终端可以在存在属于第一终端的会话时，根据第一无线资源控制重配消息进行信号测量，从而可以确定是否存在信号质量更好的小区。
在一些可能的实现方式中，第二无线资源控制重配消息包括以下任一项或多项：至少一个测量事件、可测量小区白名单或不可测量小区黑名单，可测量小区白名单包括第一网络设备的覆盖范围内或覆盖范围外的至少一个可测量小区，不可测量小区黑名单包括至少一个不可测量小区。
第一终端可以根据第一无线资源控制重配消息进行信号测量，从而在存在属于第一终端的会话时，切换至信号质量更好的网络。
在一些可能的实现方式中，该方法还包括：向第一网络设备发送第一测量报告，第一测量报告根据第一无线资源控制重配消息或第二无线资源控制重配消息确定。
第一终端可以根据不同的无线资源控制重配消息进行信号测量，并向第一网络设备发送不同的测量报告，从而使第一网络设备可以获得各个小区的信号质量的信息。
在一些可能的实现方式中，该方法还包括：在接收来自于第一网络设备的第一无线资源控制重配消息或第二无线资源控制重配消息前，向第一网络设备发送第二测量报告，第二测量报告包括用于指示第一终端测量获得的信号质量的信息。
第一终端可以向第一网络设备发送第二测量报告，从而向第一网络设备报告测量所获得的信号质量，并使第一网络设备确定发送第一无线资源控制重配消息或第二无线资源控制重配消息。或者，第一终端可以向第一网络设备发送第二测量报告，从而可以使第一网络设备确定不发送无线资源控制重配消息，并且不对第一终端进行切换。
第六方面，提供一种通信装置，包括用于执行第一方面、第二方面、或第五方面中任 一方面中的任意一种实现方式中的方法的各个模块。
第七方面，提供一种通信装置，包括用于执行第三方面或第四方面中的任意一种实现方式中的方法的各个模块。
第八方面，提供一种通信装置，包括至少一个处理器和通信接口，所述通信接口用于所述通信装置与其他通信装置进行信息交互，当程序指令在所述至少一个处理器中执行时，使得所述通信装置执行第一方面、第二方面或第五方面中任一方面中的任意一种实现方式中的方法。
第九方面，提供一种通信装置，包括至少一个处理器和通信接口，所述通信接口用于所述通信装置与其他通信装置进行信息交互，当程序指令在所述至少一个处理器中执行时，使得所述通信装置执行第三方面或第四方面中的任意一种实现方式中的方法。
第十方面，提供一种通信系统，包括第二终端、第六方面或第八方面所述的通信装置、以及第七方面或第九方面所述的通信装置。
第十一方面，提供一种计算机可读介质，该计算机可读介质存储用于设备执行的程序代码，该程序代码包括用于执行第一方面、第二方面、第三方面、第四方面、或第五方面中任一方面中的任意一种实现方式中的方法。
第十二方面，提供一种包含指令的计算机程序产品，当该计算机程序产品在计算机上运行时，使得计算机执行上述第一方面、第二方面、第三方面、第四方面、或第五方面中任一方面中的任意一种实现方式中的方法。
第十三方面，提供一种芯片，所述芯片包括处理器与数据接口，所述处理器通过所述数据接口读取存储器上存储的指令，执行上述第一方面、第二方面、第三方面、第四方面、或第五方面中任一方面中的任意一种实现方式中的方法。
可选地，作为一种实现方式，所述芯片还可以包括存储器，所述存储器中存储有指令，所述处理器用于执行所述存储器上存储的指令，当所述指令被执行时，所述处理器用于执行第一方面、第二方面、第三方面、第四方面、或第五方面中任一方面中的任意一种实现方式中的方法。
上述芯片具体可以是现场可编程门阵列(field－programmable gate array，FPGA)或者专用集成电路(application-specific integrated circuit，ASIC)。
附图说明
图1是设备间通信方式的一个场景的示意图。
图2是一种通信方法的示意性流程图。
图3是本申请实施例提供的一种通信方法的示意性流程图。
图4是本申请实施例提供的另一种通信方法的示意性流程图。
图5是本申请实施例提供的又一种通信方法的示意性流程图。
图6是本申请实施例提供的一种通信方法的示意性流程图。
图7是本申请实施例提供的另一种通信方法的示意性流程图。
图8是本申请实施例提供的一种通信装置的示意性结构图。
图9是本申请实施例提供的另一种通信装置的示意性结构图。
图10是本申请实施例提供的一种通信装置的示意性结构图。
图11是本申请实施例提供的又一种通信装置的示意性结构图。
图12是本申请实施例提供的另一种通信装置的示意性结构图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通信(global system for mobile communications，GSM)系统、码分多址(code division multiple access，CDMA)系统、宽带码分多址(wideband code division multiple access，WCDMA)系统、通用分组无线业务(general packet radio service，GPRS)、长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统、第五代(5th generation，5G)系统或新无线(new radio，NR)等。
图1是设备间通信方式的一个场景的示意图。在图1中所示的场景100中，主要存在两种通信接口，即终端121与网络设备110之间的通信接口(Uu口)和终端121与终端122之间的通信接口(PC5口)，其中Uu口用于用户设备与基站或路侧单元之间的通信，PC5口用于终端与终端之间的侧行链路通信。Uu口上终端发送数据给基站的链路称为上行链路(uplink)，而终端接收基站发送的数据的链路称为下行链路(downlink)。终端和终端之间的通信接口称为PC5口。PC5口上的终端和终端之间传输数据的链路称为侧行链路(sidelink)或直通链路。侧行链路一般用于设备到设备(device to device，D2D)等可以在设备间进行直联通信的场景，在该场景中，设备之间的数据传输不需要经过基站。车联网(vehicle to everything,V2X)通信可以看成是D2D通信的一种特殊情形。
在Uu口上，终端和基站之间通过无线承载来传输数据和无线资源控制(radio resource control，RRC)信令。其中，用于传输数据的无线承载称为数据无线承载(data radio bearer，DRB)，用于传输RRC信令的承载称为信令无线承载(signaling radio bearer，SRB)。一个无线承载包括分组数据汇聚协议(packet data convergence protocol，PDCP)实体和无线链路控制(radio link control，RLC)承载。其中，一个RLC承载包括一个RLC实体和对应的逻辑信道(Logical Channel,LCH)。无线承载的配置即为该无线承载的PDCP实体，RLC实体和逻辑信道的配置。无线承载的配置需要能够保证通过该无线承载传输的业务的服务质量(quality of service，QoS)要求。在Uu口，无线承载的配置由网络设备为终端配置。
在PC5口上，终端和终端之间也需要通过无线承载来传输数据和RRC信令。PC5口上的无线承载可以称为侧行链路无线承载(sidelink radio bearer，SL RB)。在长期演进(long term evolution，LTE)V2X系统中，PC5口上的无线承载分别由发送端终端和接收端终端自己建立，无线承载的配置通过标准预定义或者由发送端终端和接收端终端自己确定。
终端可以与网络设备进行通信。终端可以指接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、用户设备(user equipment，UE)、无线通信设备、用户代理或用户装置。用户设备还可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，5G网络中的终端或未来网络中的任意形态的用户设备等，本申请实施例对此并不限定。
本申请实施例中的网络设备可以是用于与终端通信的设备，用于将终端接入无线接入网络(radio access network，RAN)。网络设备有时也可称为接入网设备、接入网节点或基站。可以理解的是，采用不同无线接入技术的系统中，具备基站功能的设备的名称可能会有所不同。为方便描述，本申请实施例将为终端提供无线通信接入功能的装置统称为网络设备。网络设备可以是全球移动通信(global system for mobile communications，GSM)系统或码分多址(code division multiple access，CDMA)中的基站(base transceiver station，BTS)，也可以是宽带码分多址(wideband code division multiple access，WCDMA)系统中的基站(NodeB，NB)，还可以是LTE系统中的演进型基站(evoled NodeB，eNB或eNodeB)，还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器，或者该网络设备可以为中继站、接入点、车载设备、可穿戴设备以及5G网络中的网络设备或者未来演进的PLMN网络中的网络设备，5G系统中的基站的一个或一组(包括多个天线面板)天线面板，或者，还可以为构成下一代基站节点(next generation Node Base station，gNB)或传输点的网络节点，如基带单元(baseband unit，BBU)，或分布式单元(distributed unit，DU)等，本申请实施例并不限定。
在本申请实施例中，终端或网络设备包括硬件层、运行在硬件层之上的操作系统层，以及运行在操作系统层上的应用层。该硬件层包括中央处理器(central processing unit，CPU)、内存管理单元(memory management unit，MMU)和内存(也称为主存)等硬件。该操作系统可以是任意一种或多种通过进程(process)实现业务处理的计算机操作系统，例如，Linux操作系统、Unix操作系统、Android操作系统、iOS操作系统或windows操作系统等。该应用层包含浏览器、通讯录、文字处理软件、即时通信软件等应用。并且，本申请实施例并未对本申请实施例提供的方法的执行主体的具体结构特别限定，只要能够通过运行记录有本申请实施例的提供的方法的代码的程序，以根据本申请实施例提供的方法进行通信即可，例如，本申请实施例提供的方法的执行主体可以是终端或网络设备，或者，是终端或网络设备中能够调用程序并执行程序的功能模块，例如芯片或处理器等。
另外，本申请的各个方面或特征可以实现成方法、装置或使用标准编程和/或工程技术的制品。例如，计算机可读介质可以包括，但不限于：磁存储器件(例如，硬盘、软盘或磁带等)，光盘(例如，压缩盘(compact disc，CD)、数字通用盘(digital versatile disc，DVD)等)，智能卡和闪存器件(例如，可擦写可编程只读存储器(erasable programmable read-only memory，EPROM)、卡、棒或钥匙驱动器等)。另外，本文描述的各种存储介质可代表用于存储信息的一个或多个设备和/或其它机器可读介质。术语“机器可读介质”可包括但不限于，无线信道和能够存储、包含和/或承载指令和/或数据的各种其它介质。
为了提升网络性能，D2D通信支持用户设备到网络中继(UE-to-network relay，U2N Relay)。中继(relay)终端可以作为中继设备对远程(remote)终端与网络设备之间传输的数据进行中继。场景100中，终端121可以作为中继(relay)终端，终端121可以作为远程终端。
图2是一种通信方法的示意性流程图。方法200包括S201至S208。
在S201，源基站向终端发送第一RRC重配消息。第一RRC重配消息配置终端对各个基站的信号进行测量的至少一个测量事件。
第一RRC重配消息可以用于配置至少一个测量事件。例如，该至少一个测量事件中一个测量事件可以是服务小区的信号强度低于门限且目标小区信号高于门限。
终端与源基站之间建立有RRC连接。服务小区是源基站覆盖的至少一个小区中的一个。目标小区可以是目标基站覆盖的至少一个小区中的一个小区。
终端可以根据该至少一个测量事件进行测量。例如，该至少一个测量事件中的一个测量事件可以是源基站的信号强度小于阈值且目标基站的信号强度大于或等于阈值，则终端可以对各个基站的信号强度进行测量。
示例性地，源基站可以在与终端建立RRC连接之后，向终端发送第一RRC重配消息。终端可以周期性进行测量，并判断测量结果是否符合该至少一个测量事件中的任一个。
在S202，终端在测量结果满足任一个测量事件的情况下，向源基站发送测量报告(measure report，MR)。
MR可以包括该至少一个测量事件中测量结果符合的测量事件。MR还可以包括使得测量结果符合测量时间的目标小区或者目标基站。目标小区可以是目标基站覆盖的小区。
在S203，源基站根据终端发送的MR，向目标基站发送切换请求消息。
接收终端发送的MR之后，源基站可以在终端存在业务的情况下，向目标基站发送切换请求消息。
在S204，目标基站可以向源基站发送切换确认消息。
目标基站根据自身连接的其他终端的数量等情况决定是否允许该终端接入。如果目标基站确定允许该终端接入，则可以向源基站发送发切换确认消息。
发切换确认消息可以包括目标小区的相关信息以及终端接入目标小区所需的相关配置参数。目标小区的相关信息可以包括目标小区的物理小区标识(physical cell identifier，PCI)、目标小区对应的频率信息、目标基站为终端分配的该目标小区的小区无线网络临时标识(cell radio network temporary identifier，C-RNTI)等中的一个或多个。终端接入目标小区所需的相关配置参数包括接入目标小区所需的随机接入信道(random access channel，RACH)资源信息(例如，专用RACH资源和/或公共RACH资源)、目标基站的安全相关算法等中的一个或多个。
在S205，源基站可以向终端发送切换命令消息。
切换命令消息(也可以理解为第二RRC重配消息)可以包括目标小区的相关信息以及终端接入该目标小区所需的相关配置参数。
在S206，终端根据切换命令对目标基站发起随机接入，并建立与目标基站的RRC连接。
终端可以在会断开与源基站的RRC连接之后，对目标基站发起随机接入，并在接入目标基站之后建立与目标基站的RRC连接。
在S207，终端向目标基站发送RRC重配置完成消息。
终端可以在终端与目标基站的RRC连接建立成功时，向目标基站发送RRC重配置完成消息。
在S208，目标基站向源基站发送RRC连接释放消息。
源基站接收上下文释放消息后，可以释放该终端的上下文。
通过方法200，终端可以完成在小区之间的切换(handover，HO)。
在基站释放与中继终端的RRC连接的情况下，可能导致远程终端的数据中断。例如，当图2中的终端为中继终端，且该终端与源基站之间不存在该终端的协议数据单元(protocol data unit，PDU)会话的情况下，源基站在接收MR之后，不再进行S203，从 而可能导致远程终端的数据中断。
为了解决图2场景或者其他场景出现的远程终端数据中断的问题，本申请实施例提供了一种通信方法。
图3是本申请实施例提供的一种通信方法的示意性流程图。方法300包括S310至S330。执行步骤S320、S330的装置可以是第一终端，也可以是第一终端中的部件，如芯片等。
在S310，第一网络设备确定第一终端满足切换条件，且不存在属于第一终端的会话。
第一网络设备可以确定第一终端是否满足切换条件，还可以确定第一网络设备与第一终端之间是否存在属于第一终端的会话。第一终端为第二终端接入第一网络设备的中继设备，第一终端与第一网络设备之间存在第一无线资源控制连接(即第一RRC连接)。
切换条件例如可以是满足至少一个测量事件。第一终端与第一网络设备建立RRC连接之后，第一网络设备可以向第一终端发送至少一个测量事件。第一终端设备可以周期性或非周期性进行测量。在满足该至少一个测量事件中的任一个或多个的情况下，第一终端可以向第一网络设备发送测量报告。第一网络设备在接收测量报告的情况下，即可确定满足切换条件。
示例性地，测量报告可以用于指示满足的至少一个测量事件。
第一网络设备可以向第一终端发送至少一个测量事件可以包括以下事件中的一种或多种：服务小区信号质量变得低于对应门限；邻区信号质量开始比服务小区信号质量高一定偏置；邻区信号质量变得高于对应门限；服务小区信号质量变得低于门限1并且邻区信号质量变得高于门限2；邻区信号质量开始比辅小区(secondary cell，Scell)信号质量高一定偏置；异系统(inter radio access technology，Inter-RAT)邻区信号质量变得高于对应门限；主小区(primary cell，Pcell)信号质量变得低于门限1并且异系统邻区信号质量变得高于门限2。
在第一网络设备确定第一终端满足切换条件时，第一网络设备可以进一步确定是否存在属于第一终端的会话。在不存在属于第一终端的会话时，第一网络设备可以向第一终端发送连接释放消息，该连接释放消息用于指示释放第一终端与第一网络设备之间的第一RRC连接。
在第一网络设备确定第一终端是否满足切换条件前，第一网络设备可以接收来自于第一终端的测量报告，该测量报告包括用于指示第一终端测量获得的信号质量的信息。第一网络设备可以根据该测量报告，确定第一终端是否满足切换条件。
在第一网络设备向第一终端发送无线资源控制释放信息后，第一网络设备还可以释放与第一终端之间的第一无线资源控制连接。
在S320，接收第一网络设备发送的连接释放指示信息。
连接释放指示信息用于指示释放第一终端与所述第一网络设备之间连接。
连接释放指示信息例如可以是无线资源控制释放消息，所述无线资源控制释放消息用于指示释放第一终端与所述第一网络设备之间的第一无线资源控制连接。
连接释放指示信息可以承载在第一网络设备向第一终端发送RRC消息中。也就是说，第一网络设备可以在释放第一终端与第一网络设备之间的第一无线资源控制连接之前，通过第一无线资源控制连接向第一终端发送连接释放指示信息。
第一网络设备可以在出现以下至少一种情况时，释放第一无线资源控制连接，并向第一终端发送无线资源控制释放消息：接收网侧RRC连接释放信息，第一网络设备的负载 超过预设值，高层鉴权失败，底层错误(如介质访问控制(media access control，MAC)层链路失败、无线链路控制(radio link control，RLC)层链路失败等)，无线链路控制恢复且不存在属于第一终端的会话，第一无线资源控制连接对应的定时器超时，通过第一无线资源控制连接进行的消息交互失败，满足切换条件且不存在属于第一终端的会话等。
在S330，向所述第二终端发送第一指示信息，所述第一终端为所述第二终端接入所述第一网络设备的中继设备，所述第一指示信息用于指示以下信息中的至少一种：释放所述第一终端与所述第二终端之间的侧行链路，用于指示所述第一无线资源控制连接被释放，用于指示所述第一无线资源控制连接的状态为连接无法获取状态。
第一指示信息可以承载在第一终端通过侧行链路向第二终端发送的RRC消息中。第一终端与第二终端之间的侧行链路可以是第一终端与第二终端之间建立的RRC连接。第一终端通过侧行链路向第二终端发送的RRC消息也可以称为PC5-RRC消息。
第一指示信息可以作为PC5-RRC消息的一个字段，携带在PC5-RRC消息中。或者，第一指示信息可以作为一条PC5-RRC消息。
通过方法300，在作为中继设备的第一终端与网络设备之间的无线资源控制连接被释放的情况下，向作为远程终端的第二终端发送第一指示信息，从而，第二终端能够根据第一指示信息，进行后续操作，从而避免数据断流。
第一指示信息可以用于指示释放所述第一终端与所述第二终端之间的侧行链路。在这种情况下，第二终端在接收第一指示信息之后，可以进行中继重选，或者也可以对网络设备发起随机接入，并建立与网络设备的RRC连接。
第一指示信息还可以用于指示第一无线资源控制连接被释放，或者，用于指示第一无线资源控制连接的状态为连接无法获取状态。
与第一指示信息指示第一无线资源控制连接被释放这样的具体事件相比，第一指示信息指示一无线资源控制连接的状态，可以降低第一指示信息的冗余度。
具体地，在第一终端与网络设备之间的无线资源控制连接出现无线链路失败(radio link failure，RLF)、接收无线资源控制释放信息、RLF恢复失败、RRC连接建立失败、切换失败等情况下，作为用于为第二终端与网络设备提供中继服务的第二终端，可以向第二终端发送第三状态信息，以指示第一终端与网络设备之间的无线资源控制连接的状态。从而，第二终端在接收第三状态信息之后，可以进行中继重选，或者也可以对网络设备发起随机接入，并建立与网络设备的RRC连接。第一终端向第二终端发送第三状态信息，可以对第一终端与网络设备之间的无线资源控制连接的某种连接状态相关的不同具体事件采用相同的信息进行指示，可以降低第一指示信息的冗余度。
在一些实施例中，第一终端可以在第一指示信息发送之后，释放第一终端与第二终端之间的侧行链路。
在另一些实施例中，第一终端可以根据第二终端对第一指示信息的响应，进行后续操作。
在第二终端的响应用于表示保持侧行链路的情况下，第一终端可以建立与第二网络设备之间的第二无线资源控制连接。第二无线资源控制连接用于所述第二终端接入所述第二网络设备。也就是说，第一终端为第二终端重新选择网络设备，为第二终端提供服务。
第二终端可以在接收第一指示信息之后，向第一终端发送第二指示信息。第二指示信息用于指示保持所述侧行链路。第二指示信息可以理解为第二终端对第一指示信息的响应。 第一终端接收第二指示信息，即获取了第二终端表示保持侧行链路的响应。
第二终端可以在接收第一指示信息之后，断开或保持与第一终端的侧行链路。第一终端可以在第一指示信息发送后经过第一时长的检测时间点对侧行链路进行检测。在检测时间点的检测结果如果是侧行链路仍然存在，即侧行链路未被第二终端释放，而是被第二终端保持，则第一终端获取了第二终端表示保持侧行链路的响应。
应当理解，第一时长可以是预设的，也可以是第二终端与第一终端协议确定的，还可以是第一终端根据侧行链路的通信质量等信息确定的。本申请实施例对此不做限定。
在第一终端获取第二终端表示保持侧行链路的响应之后，第一终端可以建立与第二网络设备的之间的第二无线资源控制连接。反之，如果第一终端未收到第二终端发送的第二指示信息，或在检测时间点的侧行链路已经被第二终端释放，则第一终端可以不再与第二终端建立第二无线资源控制连接。
第一终端未收到第二终端发送的第二指示信息，可以是指第一终端在第一指示信息发送后经过第二时长未收到第二终端发送的第二指示信息。第二时长可以是预设的，也可以是第二终端与第一终端协议确定的，还可以是第一终端根据侧行链路的通信质量等信息确定的。
示例性地，在S320之后，第一终端可以建立与第二网络设备之间的第二无线资源控制连接。第二无线资源控制连接的建立可以不依赖于S330的进行。
通过第二无线资源控制连接的建立，可以避免第二终端的数据断流。
另外，执行方法300的装置可以确定第一终端与第一网络设备之间的无线资源控制连接的连接状态，并向第二终端发送状态指示信息，所述状态指示信息包括第一状态信息、第二状态信息或第三状态信息，所述第一状态信息用于指示所述连接状态为正在建立状态、所述第二状态信息用于指示所述连接状态为建立完成状态、所述第三状态信息用于指示所述连接状态为建立失败状态，所述第一终端为所述第二终端接入所述第一网络设备的中继设备。
具体地，正在建立状态，用于表示连接正在建立或连接建立中。在所述第一终端正在切换，所述无线资源控制连接正在建立，或对发生无线链路失败的所述无线资源控制连接正在恢复(Uu-RLF recovering)等情况下，确定所述连接状态为所述正在建立状态。
建立完成状态，用于表示连接已经完成建立或连接建立成功。在所述第一终端完成切换，所述无线资源控制连接建立完成，或所述无线资源控制连接无线链路失败恢复完成(Uu-RLF recovered)等情况下，确定所述连接状态为所述建立完成状态。
建立失败状态用于表示连接建立失败或连接无法获取。在所述第一终端设备切换失败(HOfailure)，所述无线资源控制连接建立失败，所述无线资源控制连接发生无线链路失败，对发生无线链路失败的所述无线资源控制连接进行恢复失败(Uu-RLF failure)，或所述无线资源控制连接被释放等情况下，确定所述连接状态为所述建立失败状态。
示例性地，在接收所述第一网络设备发送的无线资源控制释放信息，所述无线资源控制释放信息用于指示释放所述无线资源控制连接的情况下，确定所述连接状态为所述建立失败状态。
图4是本申请实施例提供的一种通信方法的示意性流程图。通信方法400包括S410至S460。
第一终端与第一网络设备之间建立有RRC连接。
在第一终端与第一网络设备建立RRC连接之后，第一网络设备可以向第一终端发送至少一个测量事件。
第一终端对各个小区的信号进行检测，并判断检测结果是否符合该至少一个测量事件。在检测结果符合任一个测量事件的情况下，可以进行S410。
在S410，第一终端向第一网络设备发送测量报告。
示例性地，测量报告可以包括第一终端满足的测量事件。
在S420，第一网络设备确定不存在属于第一终端的会话。
该至少一个测量事件可以包括测量事件A2、测量事件A3、测量事件A4、测量事件A5、测量事件A6、测量事件B1、测量事件B2中的至少一个事件。
测量事件A2为服务小区信号质量变得低于对应门限。
测量事件A3为邻区信号质量开始比服务小区信号质量高一定偏置。
测量事件A4为邻区信号质量变得高于对应门限。
测量事件A5为服务小区信号质量变得低于门限1并且邻区信号质量变得高于门限2。
测量事件A6为邻区信号质量开始比辅小区(secondary cell，Scell)信号质量高一定偏置。
测量事件B1为异系统(Inter-RAT)邻区信号质量变得高于对应门限。
测量事件B2为主小区(primary cell，Pcell)信号质量变得低于门限1并且异系统邻区信号质量变得高于门限2。
应当理解，主小区与辅小区均为第一网络设备覆盖的小区，用于为第一终端提供服务。主小区与辅小区对应于不同的频段。邻区是服务小区之外的小区，服务小区是第一网络设备覆盖的小区。服务小区为第一终端提供服务。
第一网络设备在接收测量报告后，可以确定是否存在第一终端的会话。在第一网络设备确定不存在第一终端的会话的情况下，第一网络设备可以释放第一终端的RRC上下文，并进行S430。第一网络设备可以释放第一终端的RRC上下文，即第一接入网设断开与第一终端的RRC连接。
第一网络设备确定不存在属于第一终端的会话时，可以对是否存在属于第一终端的协议数据单元(protocol data unit，PDU)会话进行确定。在第一网络设备确定不存在第一终端的PDU会话的情况下，第一网络设备可以进行S430，并断开与第一终端的RRC连接。
在S430，第一网络设备向第一终端发送RRC释放信息。RRC释放信息用于表示第一网络设备释放第一终端的RRC连接。
在第一终端接收RRC释放信息之后，进入RRC空闲态(RRC_IDLE)，并可以进行S440、S450、S460中的任一个。
在S440，第一终端向第二终端发送侧行链路释放指示信息。
侧行链路释放指示信息用于指示第二终端断开与第一终端之间的侧行链路连接。
第二终端接收侧行链路释放指示信息后，可以断开与第一终端之间的侧行链路连接。即第二终端可以释放侧行链路的上下文。
断开与第一终端之间的侧行链路连接之后，第二终端可以执行中继重选或小区(重新)选择。也就是说，第二终端可以重新确定中继终端，或者，第二终端可以向第二网络设备发起随机接入并与第二网络设备建立RRC连接。
S450包括S451至S453。
在S451，第一终端可以向第二终端发送Uu口RRC释放信息。
Uu口RRC释放信息用于表示第一终端与第一网络设备之间的RRC连接已断开。示例性地，Uu口RRC释放信息用于表示第一网络设备释放第一终端的RRC上下文。
第二终端接收第一终端发送的Uu口RRC释放信息之后，可以释放与第一终端之间的侧行链路。
或者，第二终端可以保持与第一终端之间的侧行链路，即保持与第一终端的连接。
在一些实施例中，第二终端在确定保持该侧行链路的情况下，可以向第一终端发送侧行链路保持信息。
在S452，第一终端获取第二终端保持侧行链路的响应。
示例性地，第一终端接收到第二终端发送的侧行链路保持信息，可以理解为第一终端获取了第二终端保持侧行链路的响应。
示例性地，第一终端中可以设置定时器。第一终端可以在发送Uu口RRC释放信息时启动定时器。定时器启动后经过第一时长之后计时结束。第一时长可以是预设的，也可以是第二终端与第一终端协议确定的，还可以是第一终端根据侧行链路的通信质量等信息确定的。第一终端可以在定时器计时结束时，判断与第二终端之间的侧行链路是否保持连接。在确定该侧行链路保持连接的情况下，第一终端获取了第二终端保持侧行链路的响应。也就是说，在Uu口RRC释放信息发送后的预设时长的检测时间点，如果第一终端确定与第二终端之间的侧行链路未断开，则第一终端获取了第二终端保持侧行链路的响应。
在S453，第一终端建立与第二网络设备之间的RRC连接。
第一终端接入第二网络设备后，可以驻留在第二网络设备覆盖的小区。
应当理解，第二网络设备可以是第一网络设备，也可以是第一网络设备之外的其他网络设备。
在第二网络设备为第一网络设备的情况下，第一终端进行随机接入后驻留的小区可以是与S410之前第一终端的服务小区不同的小区。
在第一终端与第二网络设备建立RRC连接之后，第一终端作为第二终端的中继终端，可以对第二终端与第二网络设备之间的数据进行中继。
在S451之后，如果第一终端未获取第二终端保持侧行链路的响应，则第一终端可以释放与第二终端之间的侧行链路。
S460包括S461至S463。
在S461，第一终端可以向第二终端发送状态指示信息。
在第一终端与网络设备之间的RRC连接状态发生变化的情况下，第一终端可以向第二终端发送状态指示信息。
在第一终端与网络设备之间的RRC连接状态可以是连接建立状态、连接完成状态、连接无法获取状态中的任一个。
在S410之前，第一终端与第一网络设备之间的RRC连接状态为连接完成状态。第一网络设备可以向第一终端发送RRC释放信息，并释放与第一终端之间的RRC连接。在S410，第一终端接收到第一网络设备发送的RRC释放信息，可以确定第一终端与第一网络设备之间的RRC连接状态变化为连接无法获取状态，进行S461。
或者，第一终端接收到第一网络设备发送的RRC释放信息，可以对第一终端与第一网络设备之间的RRC连接状态进行检测。在检测到第一终端与第一网络设备之间的RRC 连接状态为连接无法获取状态时，第一终端可以进行S461。
在S462，第一终端获取第二终端保持侧行链路的响应。
与S452类似，第一终端接收到第二终端发送的侧行链路保持信息，或者，第一终端在S461发送状态指示信息后的预设时长的检测时间点确定与第二终端之间的侧行链路未断开，则第一终端获取了第二终端保持侧行链路的响应。之后，第一终端可以进行S463。
在S463，第一终端建立与第二网络设备之间的RRC连接。
在S461之后，如果第一终端未获取第二终端保持侧行链路的响应，则第一终端可以释放与第二终端之间的侧行链路。
可选地，在S440之后，第一终端也可以不释放侧行链路，并在获取第二终端保持侧行链路的响应后，与第二网络设备建立RRC连接。
图5是本申请实施例提供的一种通信方法的示意性流程图。
第一终端为第二终端接入网络设备的中继设备的情况下，第一终端可以向第二终端发送事件信息，以指示与第一终端与网络设备之间的无线资源控制连接相关的事件。例如，在第一终端确认与网络设备之间的无线资源控制连接发生RLF之后，可以向第二终端发送事件信息，以指示该无线资源控制连接发生RLF。也就是说，不同的时间可以对应于不同的事件信息。
第二终端在接收不同的事件信息后，进行的操作可能的相同的。例如，事件1为第一终端切换失败，事件2为第一终端与网络设备之间的无线资源控制连接发生RLF。事件1与事件2对应的事件信息不同。但第二终端收到事件1对应的事件信息与事件2对应的事件信息后，进行的操作可以均为释放与第一终端之间的侧行链路。
也就是说，第一终端向第二终端发送事件信息，以指示与第一终端与网络设备之间的无线资源控制连接相关的事件。由于与第一终端与网络设备之间的无线资源控制连接相关的事件数量较多，为了对不同的事件信息进行区分，事件信息需要更多的比特(bit)数，会导致信息的冗余。为了解决上述问题，可以解决上述问题本申请实施例提供了通信方法500。方法500包括S510至S520。
在S510，确定第一终端与网络设备之间的无线资源控制连接的连接状态。
具体地，在所述第一终端正在切换，所述无线资源控制连接正在建立，或对发生无线链路失败的所述无线资源控制连接正在恢复的情况下，可以确定所述连接状态为所述正在建立状态。
在所述第一终端完成切换，所述无线资源控制连接建立完成，或所述无线资源控制连接无线链路失败恢复完成的情况下，可以确定所述连接状态为所述建立完成状态。
在所述第一终端设备切换失败，所述无线资源控制连接建立失败，所述无线资源控制连接发生无线链路失败，对发生无线链路失败的所述无线资源控制连接进行恢复失败，或所述无线资源控制连接被释放的情况下，可以确定所述连接状态为所述建立失败状态。
在S520，向第二终端发送状态指示信息，所述状态指示信息包括第一状态信息、第二状态信息或第三状态信息，所述第一状态示信息用于指示所述连接状态为正在建立状态、所述第二状态信息用于指示所述连接状态为建立完成状态、所述第三状态信息用于指示所述连接状态为建立失败状态，所述第一终端为所述第二终端接入所述网络设备的中继设备。
对于对应于相同的第一终端与网络设备之间的无线资源控制连接的连接状态的事件，第二终端的操作可以是相同的。通过方法500，第一终端向第二终端发送状态指示信息， 以指示第一终端与网络设备之间的无线资源控制连接的连接状态，该无线资源控制连接的连接状态的数量小于与无线资源控制连接相关事件的数量，从而可以节省信息的比特数，从而可以避免信息的冗余，也使得第一终端与第二终端的处理更为简洁。
应当理解，第一终端可以周期性或非周期性对第一终端与网络设备之间的无线资源控制连接的状态进行检测，确定第一终端与网络设备之间的无线资源控制连接的连接状态，并向第二终端发送状态指示信息。
或者，第一终端可以在确定第一终端与网络设备之间的无线资源控制连接的连接状态发生变化的情况下，向第二终端发送状态指示信息。
具体地，在第一终端接收所述第一网络设备发送的无线资源控制释放信息的情况下，可以确定所述连接状态为所述建立失败状态。所述无线资源控制释放信息用于指示释放所述无线资源控制连接。
无线资源控制释放信息指示了该无线资源控制连接的连接状态发生变化。
在接收所述第一网络设备发送的无线资源控制释放信之后，第一终端可以建立与第二网络设备之间的第二无线资源控制连接，所述第二无线资源控制连接用于所述第二终端接入所述第二网络设备。
示例性地，第一终端可以在接收所述第二终端发送的第二指示信息之后，建立与第二网络设备之间的第二无线资源控制连接。所述第二指示信息用于指示保持所述侧行链路。
第二指示信息可以理解为第一指示信息的响应信息。
示例性地，第一终端可以在所述侧行链路在检测时间点未断开的情况下，建立与所述第二网络设备之间的RRC连接，所述检测时间点包括所述第一指示信息发送后第一时长的时间点。
图6是本申请实施例提供的一种通信方法的示意性流程图。通信方法600包括S610至S630。
在S610，确定不存在属于第一终端的会话。
第一网络设备可以确定第一终端与第一网络设备之间是否存在属于第一终端的会话，还可以根据是否存在属于第一终端的会话，向第一终端发送相同或不同的无线资源控制重配消息。其中，第一终端是第二终端接入该第一网络设备的中继设备，第一终端与第二终端通过侧行链路进行通信。第一终端与第一网络设备之间存在第一无线资源控制连接。
示例性地，第一网络设备可以周期性的确定是否存在属于第一终端的会话。或者，第一网络设备可以在接收到指示信息后，确定是否存在属于第一终端的会话，该指示信息用于指示第一网络设备确定是否存在属于第一终端的会话。或者，第一网络设备可以在确定第一终端满足切换条件后，确定是否存在属于第一终端的会话，本申请实施例对此并不限定。
第一网络设备确定是否存在属于第一终端的会话时，可以对是否存在第一终端的PDU会话进行确定。
在一些实施例中，第一网络设备在确定不存在属于第一终端的会话后，可以执行步骤S620。
在另一些实施例中，第一网络设备在确定不存在属于第一终端的会话后，可以不执行步骤S620，并保持与第一终端之间的第一RRC连接。也就是说，在不存在属于第一终端的会话时，第一网络设备可以在第一终端满足切换条件的情况下，不向第一终端发送RRC 重配消息或切换指示信息，从而使第二终端可以通过第一终端与第一网络设备继续保持连接，避免传输的数据中断。
在S620，向第一终端发送第一RRC重配消息。
在第一网络设备确定第一终端与第一网络设备之间不存在属于第一终端的会话时，第一网络设备可以向第一终端发送第一RRC重配消息(即第一无线资源控制重配消息)。该第一RRC重配消息包括用于指示至少一个不可测量小区和/或第一网络设备覆盖的至少一个可测量小区的信息。
示例性地，至少一个不可测量小区可以为第一网络设备覆盖的不可测量小区，也可以为其他不可测量小区。其他不可测量小区为除第一网络设备外的网络设备覆盖的不可测量小区。
示例性地，第一RRC重配消息中用于指示至少一个不可测量小区的信息可以表现为不可测量小区黑名单的形式，第一RRC重配消息中用于指示第一网络设备覆盖的至少一个可测量小区的信息可以表现为可测量小区白名单的形式。也就是说，第一RRC重配消息中可以包括可测量小区白名单和/或不可测量小区黑名单。
在一些实施例中，在第一网络设备确定第一终端与第一网络设备之间存在属于第一终端的会话时，第一网络设备可以向第一终端发送第二RRC重配消息(即第二无线资源控制重配消息)。该第二RRC重配消息包括用于指示第一网络设备覆盖的小区和/或其他小区的信息。
示例性地，第二RRC重配消息可以包括以下任一项或多项：至少一个测量事件、可测量小区白名单或不可测量小区黑名单。该第二RRC重配消息中的可测量小区白名单包括第一网络设备覆盖的至少一个可测量小区和/或其他可测量小区。其他可测量小区为除第一网络设备外的网络设备覆盖的可测量小区。该第二RRC重配消息中的不可测量黑名单包括至少一个不可测量小区，该至少一个不可测量小区可以为第一网络设备覆盖的不可测量小区，也可以为其他不可测量小区。其他不可测量小区为除第一网络设备外的网络设备覆盖的不可测量小区。
示例性地，第二RRC重配消息中的至少一个测量事件可以包括：服务小区信号质量变得高于对应门限；服务小区信号质量变得低于对应门限；邻区信号质量开始比服务小区信号质量高一定偏置；邻区信号质量变得高于对应门限；服务小区信号质量变得低于门限1并且邻区信号质量变得高于门限2；邻区信号质量开始比辅小区信号质量高一定偏置等，本申请实施例对此并不限定。
在一些实施例中，若第一网络设备在第一时刻确定存在属于第一终端的会话，并且第一网络设备在第二时刻确定不存在属于第一终端的会话，则第一网络设备可以在第二时刻向第一终端发送第一RRC重配消息。第一时刻与第二时刻不相同，并且第一时刻早于第二时刻。
在另一些实施例中，若第一网络设备在第三时刻确定不存在属于第一终端的会话，并且第一网络设备在第四时刻确定存在属于第一终端的会话，则第一网络设备可以在第四时刻向第一终端发送第二RRC重配消息。第三时刻与第四时刻不相同，并且第三时刻早于第四时刻。
在S630，根据第一RRC重配消息，进行信号测量。
第一终端在接收到来自于第一网络设备的第一RRC重配消息后，第一终端可以根据 第一RRC重配消息，进行信号测量。
示例性地，若第一RRC重配消息包括用于指示第一网络设备覆盖的至少一个可测量小区的信息，则第一终端可以对该至少一个可测量小区中每个可测量小区的信号强度进行测量。
示例性地，若第一RRC重配消息包括用于指示至少一个不可测量小区的信息，则第一终端可以不对该至少一个不可测量小区中包括的小区的信号强度进行测量。在此情况下，第一终端还可以对除该至少一个不可测量小区外的小区的信号强度进行测量。
在一些实施例中，第一终端在接收到来自于第一网络设备的第二RRC重配消息后，第一终端可以根据第二RRC重配消息，进行信号测量。
示例性地，若第二RRC重配消息包括至少一个测量事件，则第一终端可以根据该至少一个测量事件进行测量。例如，该至少一个测量事件中的一个测量事件可以是测量事件A3，则第一终端可以对服务小区与服务小区之外的小区的信号强度进行测量。
示例性地，若第二RRC重配消息包括可测量小区白名单，则第一终端可以对该可测量小区白名单中包括的小区的信号强度进行测量。
示例性地，若第二RRC重配消息包括不可测量小区黑名单，则第一终端可以不对该不可测量小区黑名单中包括的小区的信号强度进行测量。在此情况下，第一终端还可以对除不可测量小区黑名单包括的小区外的小区的信号强度进行测量。
在一些实施例中，第一终端可以根据测量获得的信号质量，向第一网络设备发送第一测量报告。该第一测量报告根据第一RRC重配消息或第二RRC重配消息确定。
在另一些实施例中，第一网络设备可以根据接收到的来自于第一终端的第一测量报告，确定是否需要向第一终端发送切换指示信息。
第一网络设备可以根据是否存在属于第一终端的会话，向第一终端发送相同或不同的RRC重配消息。在不存在属于第一终端的会话时，第一网络设备向第一终端发送的第一RRC重配消息可以使第一终端与第一网络设备保持连接，从而使第二终端可以通过第一终端向第一网络设备传输数据，避免第二终端传输的数据中断。
图7是本申请实施例提供的一种通信方法的示意性流程图。通信方法700包括S710至S740。
在S710中，确定是否存在属于第一终端的会话。
第一网络设备与第一终端之间存在第一无线资源控制连接。第一终端是第二终端接入该第一网络设备的中继设备，第一终端与第二终端通过侧行链路进行通信。
示例性地，第一网络设备可以周期性的确定是否存在属于第一终端的会话。或者，第一网络设备可以在满足预设条件后，确定是否存在属于第一终端的会话。该预设条件可以包括：接收到指示信息，该指示信息用于指示确定是否存在属于第一终端的会话；或者确定第一终端满足切换条件等，本申请实施例对此并不限定。
第一网络设备确定不存在属于第一终端的会话的具体实现方式与步骤S610类似，此处不再赘述。
在S720中，向第一终端发送第一RRC重配消息或第二RRC重配消息。
在确定不存在属于第一终端的会话时，第一网络设备可以向第一终端发送第一RRC重配消息，该第一RRC重配消息包括用于指示至少一个不可测量小区和/或第一网络设备覆盖的至少一个可测量小区的信息。第一网络设备向第一终端发送第一RRC重配消息的 具体实现方式与步骤S620类似，此处不再赘述。
在确定不存在属于第一终端的会话时，第一网络设备可以向第一终端发送第二RRC重配消息，该第二RRC重配消息包括用于指示第一网络设备覆盖的小区和/或其他小区的信息，其他小区为第一网络设备覆盖的小区外的小区。
示例性地，第二RRC重配消息包括以下任一项或多项：至少一个测量事件、可测量小区白名单或不可测量小区黑名单。可测量小区白名单包括第一网络设备的覆盖范围内或覆盖范围外的至少一个可测量小区，不可测量小区黑名单包括至少一个不可测量小区。
在S730中，第一终端根据第一RRC重配消息或第二RRC重配消息，进行信号测量。步骤S730与步骤S630类似，此处不再赘述。
在S740中，向第一网络设备发送第一测量报告。
第一终端可以根据第一RRC重配消息或第二RRC重配消息进行信号测量，并向第一网络设备发送第一测量报告。该第一测量报告可以包括用于指示第一终端测量获得的信号质量的信息。
示例性地，若第一RRC重配消息包括第一网络设备覆盖的至少一个可测量小区，则第一测量报告可以包括第一网络设备覆盖的至少一个可测量小区中每个小区的信号质量。
示例性地，若第一RRC重配消息包括至少一个不可测量小区，则第一测量报告可包括除该至少一个不可测量小区包括的小区外的小区的信号质量。
示例性地，若第二RRC重配消息包括至少一个测量事件，则第一测量报告中可以包括该至少一个测量事件中测量结果符合的测量事件。或者，该第一测量报告还可以包括使测量结果符合测量事件的目标小区或目标基站。目标小区是目标基站覆盖的小区。或者，该第一测量报告还可以包括该至少一个测量事件中涉及的小区的信号质量。
示例性地，若第二RRC重配消息包括可测量小区白名单，则第一测量报告可以包括可测量小区白名单中包括的小区的信号质量。
示例性地，若第二RRC重配消息包括不可测量小区黑名单，则第一测量报告可以包括除不可测量小区黑名单包括的小区外的小区的信号质量。
在一些实施例中，第一网络设备可以在接收到来自于第一终端的第一测量报告之后，确定第一终端满足切换条件，并向第一终端发送切换指示信息。
示例性地，在第一网络设备确定不存在属于第一终端的会话的情况下，第一网络设备可以根据接收到的第一测量报告，确定满足切换条件的目标小区列表或目标频点列表，并从该目标小区列表或目标频点列表中确定第一小区或第一频点。该目标小区列表或目标频点列表中包括的小区或频点为第一网络设备覆盖的小区或频点。第一网络设备可以向第一终端发送切换指示信息。该切换指示信息用于指示第一终端从当前的服务小区切换至该第一小区。该第一小区为目标小区列表中可以为第一终端提供服务的小区中信号质量最好的小区。该第一频点为目标频点列表中对应的小区可以为第一终端提供服务的频点中信号质量最好的频点。该第一频点对应的小区可以为第一小区。
示例性地，在第一网络设备确定存在属于第一终端的会话的情况下，第一网络设备可以根据接收到的第一测量报告，确定满足切换条件的目标小区列表或目标频点列表。该目标小区列表或目标频点列表中包括的小区或频点为第一网络设备覆盖的小区或频点，或者可以为除第一网络设备外的网络设备覆盖的小区或频点。第一网络设备还可以从目标小区列表或目标频点列表中确定第一小区或第一频点。该第一小区可以为第一网络设备覆盖的 小区，或者可以为除第一网络设备外的网络设备覆盖的小区。该第一小区为目标小区列表中可以为第一终端提供服务的小区中信号质量最好的小区。该第一频点为目标频点列表中对应的小区可以为第一终端提供服务的频点中信号质量最好的频点。该第一频点对应的小区可以为第一小区。
若该第一小区为第一网络设备覆盖的小区，则第一网络设备可以向第一终端发送切换指示信息，该切换指示信息用于指示第一终端从当前的服务小区切换至该第一小区。
若该第一小区为除第一网络设备外的网络设备覆盖的小区，并且该第一小区所属的网络设备为第二网络设备，则第一网络设备可以向第二网络设备发送切换请求消息，从而协助第一终端从当前的服务小区切换至第二网络设备覆盖的该第一小区。
在一些实施例中，在第一网络设备向第一终端发送切换指示信息后，第一终端可以与第二网络设备建立第二RRC连接。第一终端作为第二终端的中继终端，可以对第二终端与第二网络设备之间的数据进行中继。第一终端接入第二网络设备后，可以驻留在第二网络设备覆盖的小区。
第一终端从当前的服务小区切换至该第一小区的过程可以为基于覆盖的同频切换过程，或者可以为基于覆盖的异频切换过程。
在当前的服务小区小区与第一小区的信号范围存在部分重叠区域，并且当前的服务小区小区与第一小区的频点相同时，第一终端从当前的服务小区切换至第一小区的过程为基于覆盖的同频切换。
在基于覆盖的同频切换的一些实施例中，第一网络设备可以在确定不存在属于第一终端的会话时，向第一终端发送第一RRC重配消息。第一RRC重配消息包括用于指示至少一个不可测量小区和/或第一网络设备覆盖的至少一个可测量小区的信息。
或者，第一网络设备可以在确定存在属于第一终端的会话时，向第一终端发送第二RRC重配消息。第二RRC重配消息包括以下任一项或多项：至少一个测量事件、可测量小区白名单或不可测量小区黑名单。例如，第二RRC重配消息可以包括测量事件A3。
示例性地，第一终端在接收到该第一RRC重配消息或第二RRC重配消息后，可以根据该第一RRC重配消息或第二RRC重配消息进行信号测量。并且，第一终端可以向第一网络设备发送第一测量报告。该第一测量报告根据第一RRC重配消息或第二RRC重配消息确定。例如，在第二RRC重配消息包括测量事件A3的情况下，该第一测量报告可以包括满足测量事件A3的至少一个目标小区或目标频点。
示例性地，在接收到来自于第一终端的第一测量报告之后，第一网络设备可以根据第一测量报告，生成目标小区列表或目标频点列表。第一网络设备可以从目标小区列表或目标频点列表中确定第一小区。在不存在属于第一终端的会话时，该第一小区为第一网络设备覆盖的小区。在存在属于第一终端的会话时，该第一小区可以为第一网络设备覆盖的小区，或者可以为除第一网络设备外的网络设备覆盖的小区。
在当前的服务小区与第一小区的信号范围存在部分重叠区域，并且当前的服务小区与第一小区的频点不同时，第一终端从当前的服务小区切换至第一小区的过程为基于覆盖的异频切换。
在基于覆盖的异频切换的一些实施例中，第一网络设备可以在执行S710前，接收来自于第一终端的第二测量报告。也就是说，方法700中还可以包括S701。
在S701中，第一终端向第一网络设备发送第二测量报告。
第二测量报告包括用于指示第一终端测量获得的信号质量的信息。
示例性地，第二测量报告可以根据第一终端最近接收到的RRC配置信息确定。第一终端最近接收到的RRC配置信息包括以下任一项：第一终端与第一网络设备建立连接时接收到的RRC配置信息、第一RRC重配消息、或第二RRC重配消息。该第一终端与第一网络设备建立连接时接收到的RRC配置信息可以包括至少一个测量事件。
示例性地，若第一终端最近接收到的RRC配置信息为第一终端与第一网络设备建立连接时接收到的RRC配置信息，且该第一终端与第一网络设备建立连接时接收到的RRC配置信息包括测量事件A2，则第二测量报告可以包括用于指示第二小区或第二频点的参考信号接收功率(reference signal receiving power，RSRP)或参考信号接收质量(reference signal receiving quality，RSRQ)满足测量事件A2的信息。第二小区或第二频点可以为第一网络设备覆盖的小区或频点，也可以为除第一网络设备外的网络设备覆盖的小区或频点。
示例性地，若第一终端最近接收到的RRC配置信息为第一RRC重配消息或第二RRC重配消息，则第二测量报告可以与第一测量报告类似。
在基于覆盖的异频切换的一些实施例中，第一网络设备可以在接收到来自于第一终端的第二测量报告后，确定是否存在属于第一终端的会话。或者，第一网络设备可以周期性地确定是否存在属于第一终端的会话等，本申请实施例对此并不限定。
在基于覆盖的异频切换的一些实施例中，第一网络设备可以在确定不存在属于第一终端的会话时，向第一终端发送第一RRC重配消息。第一RRC重配消息包括用于指示至少一个不可测量小区和/或第一网络设备覆盖的至少一个可测量小区的信息。
或者，第一网络设备可以在确定存在属于第一终端的会话时，向第一终端发送第二RRC重配消息。第二RRC重配消息包括以下任一项或多项：至少一个测量事件、可测量小区白名单或不可测量小区黑名单。例如，第二RRC重配消息可以包括测量事件A5和测量事件A1，或者第二RRC重配消息可以包括测量事件A3和测量事件A1。测量事件A1为服务小区信号质量变得高于对应门限。
在基于覆盖的异频切换的一些实施例中，第一网络设备可以在接收到第二测量报告，并确定存在属于第一终端的会话时，根据第二测量报告所涉及的小区或频点的配置信息，确定第二RRC重配消息的具体内容。
例如，在第二测量报告包括用于指示第二小区或第二频点的RSRP或RSRQ满足测量事件A2的信息，且确定存在属于第一终端的会话时，第一网络设备可以根据第二小区或第二频点的配置信息，确定第二RRC重配消息中包括的至少一个测量事件。
若第二小区或第二频点的配置信息为事件A5，则第二RRC重配消息可以包括测量事件A5和测量事件A1。若第二小区或第二频点的配置信息为事件A3，则第二RRC重配消息可以包括测量事件A3和测量事件A1。
可选地，第二小区或第二频点的配置信息可以为存储在第一网络设备中的信息。或者，第二小区或第二频点的配置信息可以为第一终端发送给第一网络设备的信息，本申请实施例对此并不限定。
示例性地，第一终端在接收到该第一RRC重配消息或第二RRC重配消息后，可以根据该第一RRC重配消息或第二RRC重配消息进行信号测量。并且，第一终端可以向第一网络设备发送第一测量报告。该第一测量报告根据第一RRC重配消息或第二RRC重配消息确定。例如，在第二RRC重配消息包括测量事件A5和测量事件A1的情况下，该第一 测量报告可以包括满足测量事件A5和测量事件A1的至少一个目标小区或目标频点。
示例性地，在接收到来自于第一终端的第一测量报告之后，第一网络设备可以根据第一测量报告，生成目标小区列表或目标频点列表。第一网络设备可以从目标小区列表或目标频点列表中确定第一小区。在不存在属于第一终端的会话时，该第一小区为第一网络设备覆盖的小区。在存在属于第一终端的会话时，该第一小区可以为第一网络设备覆盖的小区，或者可以为除第一网络设备外的网络设备覆盖的小区。
在基于覆盖的异频切换的另一些实施例中，第一网络设备可以在接收到来自于第一终端的第二测量报告，并确定不存在属于第一终端的会话时，不向第一终端发送第一RRC重配消息，并保持与第一终端之间的第一RRC连接。在此情况下，第二终端可以通过第一终端继续与第一网络设备保持连接，从而避免传输的数据中断。
第一网络设备可以在存在属于第一终端的会话时，向第一终端发送第二RRC重配消息，从而使第一终端可以根据第二RRC重配消息进行信号测量，确定是否存在信号质量更好的小区。第一网络设备还可以在不存在属于第一终端的会话时，向第一终端发送第一RRC重配消息，使第一终端与第一网络设备保持连接，从而避免第二终端传输的数据中断。
图8是本申请实施例提供的一种通信装置的示意性结构图。
通信装置800包括接收模块810和发送模块820。
接收模块810用于，接收第一网络设备发送的无线资源控制释放信息，所述无线资源控制释放信息用于指示释放第一终端与所述第一网络设备之间的第一无线资源控制连接。第一终端可以包括装置800。
发送模块820用于，向所述第二终端发送第一指示信息，所述第一终端为所述第二终端接入所述第一网络设备的中继设备，所述第一指示信息用于指示释放所述第一终端与所述第二终端之间的侧行链路，或者，用于指示所述第一无线资源控制连接被释放，或者，用于指示所述第一无线资源控制连接的状态为连接失败状态。
可选地，通信装置800还包括建立模块，用于建立与第二网络设备之间的第二无线资源控制连接，所述第二无线资源控制连接用于所述第二终端接入所述第二网络设备。
可选地，接收模块810还用于，接收所述第二终端发送的第二指示信息，所述第二指示信息用于指示保持所述侧行链路。
可选地，建立模块具体用于，所述侧行链路在检测时间点未断开的情况下，建立与所述第二网络设备之间的RRC连接，所述检测时间点包括所述第一指示信息发送后第一时长的时间点。
可选地，所述无线资源控制释放信息是在所述第一终端满足切换条件，且所述第一终端与所述第一网络设备之间不存在属于所述第一终端的会话的情况下接收的。
可选地，通信装置800还包括处理模块，处理模块用于，确定所述第一无线资源控制连接的连接状态。
发送模块820还用于，向第二终端发送状态指示信息，所述状态指示信息包括第一状态信息、第二状态信息或第三状态信息，所述第一状态信息用于指示所述连接状态为正在建立状态、所述第二状态信息用于指示所述连接状态为建立完成状态、所述第三状态信息用于指示所述连接状态为建立失败状态。
可选地，处理模块具体用于，在所述第一终端正在切换，所述第一无线资源控制连接 正在建立，或对发生无线链路失败的所述第一无线资源控制连接正在恢复的情况下，确定所述连接状态为所述正在建立状态。
处理模块具体用于，在所述第一终端完成切换，所述第一无线资源控制连接建立完成，或所述第一无线资源控制连接无线链路失败恢复完成的情况下，确定所述连接状态为所述建立完成状态。
处理模块具体用于，在所述第一终端设备切换失败，所述第一无线资源控制连接建立失败，所述第一无线资源控制连接发生无线链路失败，对发生无线链路失败的所述第一无线资源控制连接进行恢复失败，或所述第一无线资源控制连接被释放的情况下，确定所述连接状态为所述建立失败状态。
图9是本申请实施例提供的一种通信装置的示意性结构图。
通信装置900包括处理模块910和收发模块920。
处理模块910用于，确定第一终端与第一网络设备之间的第一无线资源控制连接的连接状态。通信装置900可以位于第一终端中。
收发模块920用于，向第二终端发送状态指示信息，所述状态指示信息包括第一状态信息、第二状态信息或第三状态信息，所述第一状态信息用于指示所述连接状态为正在建立状态、所述第二状态信息用于指示所述连接状态为建立完成状态、所述第三状态信息用于指示所述连接状态为建立失败状态，所述第一终端为所述第二终端接入所述第一网络设备的中继设备。
可选地，处理模块910具体用于，在所述第一终端正在切换，所述第一无线资源控制连接正在建立，或对发生无线链路失败的所述第一无线资源控制连接正在恢复的情况下，确定所述连接状态为所述正在建立状态。
处理模块910具体用于，在所述第一终端完成切换，所述第一无线资源控制连接建立完成，或所述第一无线资源控制连接无线链路失败恢复完成的情况下，确定所述连接状态为所述建立完成状态。
处理模块910具体用于，在所述第一终端设备切换失败，所述第一无线资源控制连接建立失败，所述第一无线资源控制连接发生无线链路失败，对发生无线链路失败的所述第一无线资源控制连接进行恢复失败，或所述第一无线资源控制连接被释放的情况下，确定所述连接状态为所述建立失败状态。
可选地，处理模块910具体用于，在接收所述第一网络设备发送的无线资源控制释放信息的情况下，确定所述连接状态为所述建立失败状态，所述无线资源控制释放信息用于指示释放所述第一无线资源控制连接。
可选地，处理模块910还用于，建立与第二网络设备之间的第二无线资源控制连接，所述第二无线资源控制连接用于所述第二终端接入所述第二网络设备。
可选地，收发模块920用于，所述方法还包括：接收所述第二终端发送的第二指示信息，所述第二指示信息用于指示保持所述侧行链路。
可选地，处理模块910具体用于，所述侧行链路在检测时间点未断开的情况下，建立与所述第二网络设备之间的RRC连接，所述检测时间点包括所述第一指示信息发送后第一时长的时间点。
可选地，处理模块910具体用于，所述无线资源控制释放信息是在所述第一终端满足切换条件，且所述第一终端与所述第一网络设备之间不存在属于所述第一终端的会话的情 况下接收的。
在一些实施例中，收发模块920可以在第一终端与第一网络设备之间不存在属于第一终端的会话时，接收来自于第一网络设备的第一无线资源控制重配消息，还可以在存在属于第一终端的会话时，接收来自于第一网络设备的第二无线资源控制重配消息。收发模块920还可以向第一网络设备发送第一测量报告或第二测量报告。收发模块920可以执行图6的方法中的步骤S620或图7的方法中的步骤S701、S720、S740。
在一些实施例中，处理模块910可以根据第一无线资源控制重配消息或第二无线资源控制重配消息，进行信号测量。处理模块910可以执行图6的方法中的步骤S630，或图7的方法中的步骤S730。
在一些实施例中，收发模块920还可以在接收来自于第一网络设备的第一无线资源控制重配消息或第二无线资源控制重配消息前，向第一网络设备发送第二测量报告。该第二测量报告包括用于指示第一终端测量获得的信号质量的信息。
图10是本申请实施例提供的一种通信装置的示意性结构图。
通信装置1000包括处理模块1010和收发模块1020。
处理模块1010用于确定第一终端满足切换条件，且第一终端与第一网络设备之间不存在属于第一终端的会话。该第一终端为第二终端接入第一网络设备的中继设备，第一终端与第一网络设备之间存在第一无线资源控制连接。
收发模块1020用于向第一终端发送无线资源控制释放信息。无线资源控制释放信息用于指示释放第一终端与第一网络设备之间的第一无线资源控制连接。
在一些实施例中，收发模块1020还用于接收来自于第一终端的测量报告。该测量报告包括用于指示第一终端测量获得的信号质量的信息。
在一些实施例中，处理模块1010还用于根据接收到的来自于第一终端的测量报告，确定第一终端满足切换条件。处理模块1010还可以用于释放第一终端与第一网络设备之间的第一无线资源控制连接。
在一些实施例中，处理模块1010可以确定第一终端与第一网络设备之间是否存在属于第一终端的会话，第一终端为第二终端接入第一网络设备的中继设备。处理模块1010可以执行图6的方法中的步骤S610或图7的方法中的步骤S710。
在一些实施例中，收发模块1020可以在不存在属于第一终端的会话时，向第一终端发送第一无线资源控制重配消息，还可以在存在属于第一终端的会话时，向第一终端发送第二无线资源控制重配消息。收发模块1020还可以接收来自于第一终端的第一测量报告或第二测量报告。收发模块1020可以执行图6的方法中的步骤S620，或图7的方法中的步骤S701、S720、S740。
在一些实施例中，处理模块1010还可以根据第二测量报告，确定第一终端满足切换条件。
图11是本申请实施例提供的一种通信装置的示意性结构图。
通信装置2000包括至少一个处理器2010和通信接口2020。通信接口2020用于所述终端与其他通信装置进行信息交互，当程序指令在所述至少一个处理器中执行时，使得所述终端执行前文所述的通信方法。第一终端可以包括通信装置2000。
具体地，在一些实施例中，至少一个处理器2010可以用于，利用通信接口2020，接收第一网络设备发送的无线资源控制释放信息，所述无线资源控制释放信息用于指示释放 第一终端与所述第一网络设备之间的第一无线资源控制连接。
至少一个处理器2010还可以用于，利用通信接口2020，向所述第二终端发送第一指示信息，所述第一终端为所述第二终端接入所述第一网络设备的中继设备，所述第一指示信息用于指示释放所述第一终端与所述第二终端之间的侧行链路，或者，用于指示所述第一无线资源控制连接被释放，或者，用于指示所述第一无线资源控制连接的状态为连接失败状态。
可选地，至少一个处理器2010还用于，建立与第二网络设备之间的第二无线资源控制连接，所述第二无线资源控制连接用于所述第二终端接入所述第二网络设备。
可选地，至少一个处理器2010还用于，利用通信接口2020，接收所述第二终端发送的第二指示信息，所述第二指示信息用于指示保持所述侧行链路。
可选地，至少一个处理器2010具体用于，所述侧行链路在检测时间点未断开的情况下，建立与所述第二网络设备之间的RRC连接，所述检测时间点包括所述第一指示信息发送后第一时长的时间点。
可选地，所述无线资源控制释放信息是在所述第一终端满足切换条件，且所述第一终端与所述第一网络设备之间不存在属于所述第一终端的会话的情况下接收的。
可选地，至少一个处理器2010具体用于，确定所述第一无线资源控制连接的连接状态。
至少一个处理器2010还用于，利用通信接口2020，向第二终端发送状态指示信息，所述状态指示信息包括第一状态信息、第二状态信息或第三状态信息，所述第一状态信息用于指示所述连接状态为正在建立状态、所述第二状态信息用于指示所述连接状态为建立完成状态、所述第三状态信息用于指示所述连接状态为建立失败状态。
可选地，至少一个处理器2010具体用于，在所述第一终端正在切换，所述第一无线资源控制连接正在建立，或对发生无线链路失败的所述第一无线资源控制连接正在恢复的情况下，确定所述连接状态为所述正在建立状态。
至少一个处理器2010具体用于在所述第一终端完成切换，所述第一无线资源控制连接建立完成，或所述第一无线资源控制连接无线链路失败恢复完成的情况下，确定所述连接状态为所述建立完成状态。
至少一个处理器2010具体用于，在所述第一终端设备切换失败，所述第一无线资源控制连接建立失败，所述第一无线资源控制连接发生无线链路失败，对发生无线链路失败的所述第一无线资源控制连接进行恢复失败，或所述第一无线资源控制连接被释放的情况下，确定所述连接状态为所述建立失败状态。
在另一些实施例中，至少一个处理器2010用于，确定第一终端与第一网络设备之间的第一无线资源控制连接的连接状态。
通信接口2020用于，向第二终端发送状态指示信息，所述状态指示信息包括第一状态信息、第二状态信息或第三状态信息，所述第一状态信息用于指示所述连接状态为正在建立状态、所述第二状态信息用于指示所述连接状态为建立完成状态、所述第三状态信息用于指示所述连接状态为建立失败状态，所述第一终端为所述第二终端接入所述第一网络设备的中继设备。
可选地，至少一个处理器具体2010用于，在所述第一终端正在切换，所述第一无线资源控制连接正在建立，或对发生无线链路失败的所述第一无线资源控制连接正在恢复的 情况下，确定所述连接状态为所述正在建立状态。
至少一个处理器具体2010用于，在所述第一终端完成切换，所述第一无线资源控制连接建立完成，或所述第一无线资源控制连接无线链路失败恢复完成的情况下，确定所述连接状态为所述建立完成状态。
至少一个处理器具体2010用于，在所述第一终端设备切换失败，所述第一无线资源控制连接建立失败，所述第一无线资源控制连接发生无线链路失败，对发生无线链路失败的所述第一无线资源控制连接进行恢复失败，或所述第一无线资源控制连接被释放的情况下，确定所述连接状态为所述建立失败状态。
可选地，至少一个处理器具体2010用于，在接收所述第一网络设备发送的无线资源控制释放信息的情况下，确定所述连接状态为所述建立失败状态，所述无线资源控制释放信息用于指示释放所述第一无线资源控制连接。
可选地，至少一个处理器具体2010用于，建立与第二网络设备之间的第二无线资源控制连接，所述第二无线资源控制连接用于所述第二终端接入所述第二网络设备。
可选地，通信接口2020还用于，所述方法还包括：接收所述第二终端发送的第二指示信息，所述第二指示信息用于指示保持所述侧行链路。
可选地，至少一个处理器具体2010用于，所述侧行链路在检测时间点未断开的情况下，建立与所述第二网络设备之间的RRC连接，所述检测时间点包括所述第一指示信息发送后第一时长的时间点。
可选地，所述无线资源控制释放信息是在所述第一终端满足切换条件，且所述第一终端与所述第一网络设备之间不存在属于所述第一终端的会话的情况下接收的。
在一些实施例中，至少一个处理器2010可以用于，利用通信接口2020，在第一终端与第一网络设备之间不存在属于第一终端的会话时，接收来自于第一网络设备的第一无线资源控制重配消息。
在一些实施例中，至少一个处理器2010还可以用于，利用通信接口2020，在存在属于第一终端的会话时，接收来自于第一网络设备的第二无线资源控制重配消息。
在一些实施例中，至少一个处理器2010还可以用于，根据第一无线资源控制重配消息或第二无线资源控制重配消息，进行信号测量。
在一些实施例中，至少一个处理器2010还可以用于，利用通信接口2020，向第一网络设备发送第一测量报告或第二测量报告。
在一些实施例中，至少一个处理器2010还可以用于，建立与第二网络设备的第二RRC连接。该第二无线资源控制连接用于第二终端接入第二网络设备。
图12是本申请实施例提供的一种通信装置的示意性结构图。
通信装置3000包括至少一个处理器3010和通信接口3020。通信接口3020用于通信装置与其他通信装置进行信息交互，当程序指令在所述至少一个处理器中执行时，使得通信装置执行前文所述的通信方法。第一网络设备可以包括通信装置3000。
在一些实施例中，至少一个处理器3010可以用于，确定第一终端满足切换条件，且第一终端与第一网络设备之间不存在属于第一终端的会话。该第一终端为第二终端接入第一网络设备的中继设备，第一终端与第一网络设备之间存在第一无线资源控制连接。
在一些实施例中，至少一个处理器3010还可以用于，利用通信接口3020，向第一终端发送无线资源控制释放信息。无线资源控制释放信息用于指示释放第一终端与第一网络 设备之间的第一无线资源控制连接。
在一些实施例中，至少一个处理器3010还可以用于，利用通信接口3020，接收来自于第一终端的测量报告。该测量报告包括用于指示第一终端测量获得的信号质量的信息。
在一些实施例中，至少一个处理器3010还可以用于，根据接收到的来自于第一终端的测量报告，确定第一终端满足切换条件。
在一些实施例中，至少一个处理器3010还可以用于，释放第一终端与第一网络设备之间的第一无线资源控制连接。
在一些实施例中，至少一个处理器3010可以用于，确定第一终端与第一网络设备之间是否存在属于第一终端的会话，第一终端为第二终端接入第一网络设备的中继设备。
在一些实施例中，至少一个处理器3010还可以用于，利用通信接口3020，在不存在属于第一终端的会话时，向第一终端发送第一无线资源控制重配消息。
在一些实施例中，至少一个处理器3010还可以用于，利用通信接口3020，在存在属于第一终端的会话时，向第一终端发送第二无线资源控制重配消息。
在一些实施例中，至少一个处理器3010还可以用于，利用通信接口3020，接收来自于第一终端的第一测量报告或第二测量报告。
本申请实施例还提供一种通信系统，包括前文所述的第一终端、第二终端和第一网络设备。在一些实施例中，该通信系统还可以包括第二网络设备。
本申请实施例还提供一种计算机程序存储介质，其特征在于，所述计算机程序存储介质具有程序指令，当所述程序指令被执行时，使得前文中的方法被执行。
本申请实施例还提供一种芯片系统，其特征在于，所述芯片系统包括至少一个处理器，当程序指令在所述至少一个处理器中执行时，使得前文中的方法被执行。
应理解，本申请实施例中的处理器可以为中央处理单元(central processing unit，CPU)，该处理器还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的随机存取存储器(random access memory，RAM)可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
上述实施例，可以全部或部分地通过软件、硬件、固件或其他任意组合来实现。当使用软件实现时，上述实施例可以全部或部分地以计算机程序产品的形式实现。所述计算机 程序产品包括一个或多个计算机指令或计算机程序。在计算机上加载或执行所述计算机指令或计算机程序时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以为通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集合的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质。半导体介质可以是固态硬盘。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况，其中A,B可以是单数或者复数。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系，但也可能表示的是一种“和/或”的关系，具体可参考前后文进行理解。
本申请中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a,b,或c中的至少一项(个)，可以表示：a,b,c,a-b,a-c,b-c,或a-b-c，其中a,b,c可以是单个，也可以是多个。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能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部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (60)

  1. 一种通信方法，其特征在于，所述方法包括：
    接收第一网络设备发送的无线资源控制释放信息，所述无线资源控制释放信息用于指示释放第一终端与所述第一网络设备之间的第一无线资源控制连接；
    向所述第二终端发送第一指示信息，所述第一终端为所述第二终端接入所述第一网络设备的中继设备，所述第一指示信息用于指示以下信息中的至少一种：释放所述第一终端与所述第二终端之间的侧行链路，所述第一无线资源控制连接被释放，所述第一无线资源控制连接的状态为连接失败状态。
  2. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    建立与第二网络设备之间的第二无线资源控制连接，所述第二无线资源控制连接用于所述第二终端接入所述第二网络设备。
  3. 根据权利要求1或2所述的方法，其特征在于，
    所述方法还包括：接收所述第二终端发送的第二指示信息，所述第二指示信息用于指示保持所述侧行链路。
  4. 根据权利要求2所述的方法，其特征在于，
    所述建立与第二网络设备之间的第二无线资源控制连接，包括：所述侧行链路在检测时间点未断开的情况下，建立与所述第二网络设备之间的RRC连接，所述检测时间点包括所述第一指示信息发送后第一时长的时间点。
  5. 根据权利要求1-4中任一项所述的方法，其特征在于，
    所述无线资源控制释放信息是在所述第一终端满足切换条件，且所述第一终端与所述第一网络设备之间不存在属于所述第一终端的会话的情况下接收的。
  6. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    确定所述第一无线资源控制连接的连接状态；
    向第二终端发送状态指示信息，所述状态指示信息包括第一状态信息、第二状态信息或第三状态信息，所述第一状态信息用于指示所述连接状态为正在建立状态、所述第二状态信息用于指示所述连接状态为建立完成状态、所述第三状态信息用于指示所述连接状态为建立失败状态。
  7. 根据权利要求6所述的方法，其特征在于，所述确定所述第一无线资源控制连接的连接状态，包括：
    在所述第一终端正在切换，所述第一无线资源控制连接正在建立，或对发生无线链路失败的所述第一无线资源控制连接正在恢复的情况下，确定所述连接状态为所述正在建立状态；或者，
    在所述第一终端完成切换，所述第一无线资源控制连接建立完成，或所述第一无线资源控制连接无线链路失败恢复完成的情况下，确定所述连接状态为所述建立完成状态；或者，
    在所述第一终端设备切换失败，所述第一无线资源控制连接建立失败，所述第一无线资源控制连接发生无线链路失败，对发生无线链路失败的所述第一无线资源控制连接进行恢复失败，或所述第一无线资源控制连接被释放的情况下，确定所述连接状态为所述建立 失败状态。
  8. 一种通信方法，其特征在于，所述方法包括：
    确定第一终端与第一网络设备之间的第一无线资源控制连接的连接状态；
    向第二终端发送状态指示信息，所述状态指示信息包括第一状态信息、第二状态信息或第三状态信息，所述第一状态信息用于指示所述连接状态为正在建立状态、所述第二状态信息用于指示所述连接状态为建立完成状态、所述第三状态信息用于指示所述连接状态为建立失败状态，所述第一终端为所述第二终端接入所述第一网络设备的中继设备。
  9. 根据权利要求8所述的方法，其特征在于，所述确定第一终端与第一网络设备之间的第一无线资源控制连接的连接状态，包括：
    在所述第一终端正在切换，所述第一无线资源控制连接正在建立，或对发生无线链路失败的所述第一无线资源控制连接正在恢复的情况下，确定所述连接状态为所述正在建立状态；或者，
    在所述第一终端完成切换，所述第一无线资源控制连接建立完成，或所述第一无线资源控制连接无线链路失败恢复完成的情况下，确定所述连接状态为所述建立完成状态；或者，
    在所述第一终端设备切换失败，所述第一无线资源控制连接建立失败，所述第一无线资源控制连接发生无线链路失败，对发生无线链路失败的所述第一无线资源控制连接进行恢复失败，或所述第一无线资源控制连接被释放的情况下，确定所述连接状态为所述建立失败状态。
  10. 根据权利要求8或9所述的方法，其特征在于，所述确定第一终端与第一网络设备之间的第一无线资源控制连接的连接状态，包括：在接收所述第一网络设备发送的无线资源控制释放信息的情况下，确定所述连接状态为所述建立失败状态，所述无线资源控制释放信息用于指示释放所述第一无线资源控制连接。
  11. 根据权利要求10所述的方法，其特征在于，所述方法还包括：
    建立与第二网络设备之间的第二无线资源控制连接，所述第二无线资源控制连接用于所述第二终端接入所述第二网络设备。
  12. 根据权利要求10或11所述的方法，其特征在于，
    所述方法还包括：接收所述第二终端发送的第二指示信息，所述第二指示信息用于指示保持所述侧行链路。
  13. 根据权利要求11或12所述的方法，其特征在于，
    所述建立与第二网络设备之间的第二无线资源控制连接，包括：所述侧行链路在检测时间点未断开的情况下，建立与所述第二网络设备之间的RRC连接，所述检测时间点包括所述第一指示信息发送后第一时长的时间点。
  14. 根据权利要求10-13中任一项所述的方法，其特征在于，
    所述无线资源控制释放信息是在所述第一终端满足切换条件，且所述第一终端与所述第一网络设备之间不存在属于所述第一终端的会话的情况下接收的。
  15. 一种通信方法，其特征在于，所述方法包括：
    确定第一终端满足切换条件，且所述第一终端与第一网络设备之间不存在属于所述第一终端的会话，所述第一终端为第二终端接入所述第一网络设备的中继设备，所述第一终端与所述第一网络设备之间存在第一无线资源控制连接；
    向所述第一终端发送无线资源控制释放信息，所述无线资源控制释放信息用于指示释放所述第一无线资源控制连接。
  16. 根据权利要求15所述的方法，其特征在于，所述方法还包括：
    接收来自于所述第一终端的测量报告，所述测量报告包括用于指示所述第一终端测量获得的信号质量的信息；
    根据所述测量报告，确定所述第一终端满足所述切换条件。
  17. 根据权利要求15或16所述的方法，其特征在于，所述方法还包括：
    释放所述第一终端与所述第一网络设备之间的第一无线资源控制连接。
  18. 一种通信方法，其特征在于，所述方法包括：
    确定第一终端与第一网络设备之间是否存在属于所述第一终端的会话，所述第一终端为第二终端接入所述第一网络设备的中继设备；
    在不存在所述属于所述第一终端的会话时，向所述第一终端发送第一无线资源控制重配消息，所述第一无线资源控制重配消息包括用于指示至少一个不可测量小区和/或所述第一网络设备覆盖的至少一个可测量小区的信息。
  19. 根据权利要求18所述的方法，其特征在于，所述方法还包括：
    在存在所述属于所述第一终端的会话时，向所述第一终端发送第二无线资源控制重配消息，所述第二无线资源控制重配消息包括用于指示所述第一网络设备覆盖的小区和/或其他小区的信息，所述其他小区为所述第一网络设备覆盖的小区外的小区。
  20. 根据权利要求19所述的方法，其特征在于，所述第二无线资源控制重配消息包括以下任一项或多项：至少一个测量事件、可测量小区白名单、或不可测量小区黑名单，所述可测量小区白名单包括所述第一网络设备的覆盖范围内或覆盖范围外的至少一个可测量小区，所述不可测量小区黑名单包括至少一个不可测量小区。
  21. 根据权利要求18至20中任一项所述的方法，其特征在于，所述方法还包括：
    接收来自于所述第一终端的第一测量报告，所述第一测量报告根据第二无线资源控制重配消息或所述第一无线资源控制重配消息确定。
  22. 根据权利要求18至21中任一项所述的方法，其特征在于，所述确定第一终端与第一网络设备之间存在属于所述第一终端的会话前，所述方法还包括：
    接收来自于所述第一终端的第二测量报告，所述第二测量报告包括用于指示所述第一终端测量获得的信号质量的信息；
    根据所述第二测量报告，确定所述第一终端满足切换条件。
  23. 一种通信方法，其特征在于，所述方法包括：
    在第一终端与第一网络设备之间不存在属于所述第一终端的会话时，接收来自于所述第一网络设备的第一无线资源控制重配消息，所述第一无线资源控制重配消息包括用于指示至少一个不可测量小区和/或所述第一网络设备覆盖的至少一个可测量小区的信息，所述第一终端为第二终端接入所述第一网络设备的中继设备；
    根据所述第一无线资源控制重配消息，进行信号测量。
  24. 根据权利要求23所述的方法，其特征在于，所述方法还包括：
    在存在所述属于所述第一终端的会话时，接收来自于所述第一网络设备的第二无线资源控制重配消息，所述第二无线资源控制重配消息包括用于指示所述第一网络设备覆盖的小区和/或其他小区的信息，所述其他小区为所述第一网络设备覆盖的小区外的小区；
    根据所述第二无线资源控制重配消息，进行信号测量。
  25. 根据权利要求24所述的方法，其特征在于，所述第二无线资源控制重配消息包括以下任一项或多项：至少一个测量事件、可测量小区白名单、或不可测量小区黑名单，所述可测量小区白名单包括所述第一网络设备的覆盖范围内或覆盖范围外的至少一个可测量小区，所述不可测量小区黑名单包括至少一个不可测量小区。
  26. 根据权利要求23至25中任一项所述的方法，其特征在于，所述方法还包括：
    向所述第一网络设备发送第一测量报告，所述第一测量报告根据第二无线资源控制重配消息或所述第一无线资源控制重配消息确定。
  27. 根据权利要求23至26中任一项所述的方法，其特征在于，所述方法还包括：
    在接收来自于所述第一网络设备的第二无线资源控制重配消息或所述第一无线资源控制重配消息前，向所述第一网络设备发送第二测量报告，所述第二测量报告包括用于指示所述第一终端测量获得的信号质量的信息。
  28. 一种通信装置，其特征在于，包括：
    接收模块，用于接收第一网络设备发送的无线资源控制释放信息，所述无线资源控制释放信息用于指示释放第一终端与所述第一网络设备之间的第一无线资源控制连接；
    发送模块，用于向所述第二终端发送第一指示信息，所述第一终端为所述第二终端接入所述第一网络设备的中继设备，所述第一指示信息用于指示以下信息中的至少一种：释放所述第一终端与所述第二终端之间的侧行链路，所述第一无线资源控制连接被释放，所述第一无线资源控制连接的状态为连接失败状态。
  29. 根据权利要求28所述的装置，其特征在于，所述装置还包括建立模块，所述建立模块用于建立与第二网络设备之间的第二无线资源控制连接，所述第二无线资源控制连接用于所述第二终端接入所述第二网络设备。
  30. 根据权利要求28或29所述的装置，其特征在于，所述接收模块，还用于接收所述第二终端发送的第二指示信息，所述第二指示信息用于指示保持所述侧行链路。
  31. 根据权利要求29所述的装置，其特征在于，所述建立模块，具体用于所述侧行链路在检测时间点未断开的情况下，建立与所述第二网络设备之间的RRC连接，所述检测时间点包括所述第一指示信息发送后第一时长的时间点。
  32. 根据权利要求28至31中任一项所述的装置，其特征在于，所述无线资源控制释放信息是在所述第一终端满足切换条件，且所述第一终端与所述第一网络设备之间不存在属于所述第一终端的会话的情况下接收的。
  33. 根据权利要求28所述的装置，其特征在于，所述装置还包括处理模块，所述处理模块用于确定所述第一无线资源控制连接的连接状态；
    所述发送模块，还用于向第二终端发送状态指示信息，所述状态指示信息包括第一状态信息、第二状态信息或第三状态信息，所述第一状态信息用于指示所述连接状态为正在建立状态、所述第二状态信息用于指示所述连接状态为建立完成状态、所述第三状态信息用于指示所述连接状态为建立失败状态。
  34. 根据权利要求33所述的装置，其特征在于，所述处理模块，具体用于：
    在所述第一终端正在切换，所述第一无线资源控制连接正在建立，或对发生无线链路失败的所述第一无线资源控制连接正在恢复的情况下，确定所述连接状态为所述正在建立状态；或者，
    在所述第一终端完成切换，所述第一无线资源控制连接建立完成，或所述第一无线资源控制连接无线链路失败恢复完成的情况下，确定所述连接状态为所述建立完成状态；或者，
    在所述第一终端设备切换失败，所述第一无线资源控制连接建立失败，所述第一无线资源控制连接发生无线链路失败，对发生无线链路失败的所述第一无线资源控制连接进行恢复失败，或所述第一无线资源控制连接被释放的情况下，确定所述连接状态为所述建立失败状态。
  35. 一种通信装置，其特征在于，包括：
    处理模块，用于确定第一终端与第一网络设备之间的第一无线资源控制连接的连接状态；
    收发模块，用于向第二终端发送状态指示信息，所述状态指示信息包括第一状态信息、第二状态信息或第三状态信息，所述第一状态信息用于指示所述连接状态为正在建立状态、所述第二状态信息用于指示所述连接状态为建立完成状态、所述第三状态信息用于指示所述连接状态为建立失败状态，所述第一终端为所述第二终端接入所述第一网络设备的中继设备。
  36. 根据权利要求35所述的装置，其特征在于，所述处理模块，具体用于：
    在所述第一终端正在切换，所述第一无线资源控制连接正在建立，或对发生无线链路失败的所述第一无线资源控制连接正在恢复的情况下，确定所述连接状态为所述正在建立状态；或者，
    在所述第一终端完成切换，所述第一无线资源控制连接建立完成，或所述第一无线资源控制连接无线链路失败恢复完成的情况下，确定所述连接状态为所述建立完成状态；或者，
    在所述第一终端设备切换失败，所述第一无线资源控制连接建立失败，所述第一无线资源控制连接发生无线链路失败，对发生无线链路失败的所述第一无线资源控制连接进行恢复失败，或所述第一无线资源控制连接被释放的情况下，确定所述连接状态为所述建立失败状态。
  37. 根据权利要求35或36所述的装置，其特征在于，所述处理模块，具体用于在接收所述第一网络设备发送的无线资源控制释放信息的情况下，确定所述连接状态为所述建立失败状态，所述无线资源控制释放信息用于指示释放所述第一无线资源控制连接。
  38. 根据权利要求37所述的装置，其特征在于，所述处理模块，还用于建立与第二网络设备之间的第二无线资源控制连接，所述第二无线资源控制连接用于所述第二终端接入所述第二网络设备。
  39. 根据权利要求37或38所述的装置，其特征在于，所述收发模块，还用于接收所述第二终端发送的第二指示信息，所述第二指示信息用于指示保持所述侧行链路。
  40. 根据权利要求38或39所述的装置，其特征在于，所述处理模块，还用于所述侧行链路在检测时间点未断开的情况下，建立与所述第二网络设备之间的RRC连接，所述检测时间点包括所述第一指示信息发送后第一时长的时间点。
  41. 根据权利要求37至40中任一项所述的装置，其特征在于，所述无线资源控制释放信息是在所述第一终端满足切换条件，且所述第一终端与所述第一网络设备之间不存在属于所述第一终端的会话的情况下接收的。
  42. 一种通信装置，其特征在于，包括：
    处理模块，用于确定第一终端满足切换条件，且所述第一终端与第一网络设备之间不存在属于所述第一终端的会话，所述第一终端为第二终端接入所述第一网络设备的中继设备，所述第一终端与所述第一网络设备之间存在第一无线资源控制连接；
    收发模块，用于向所述第一终端发送无线资源控制释放信息，所述无线资源控制释放信息用于指示释放所述第一无线资源控制连接。
  43. 根据权利要求42所述的装置，其特征在于，所述收发模块，还用于接收来自于所述第一终端的测量报告，所述测量报告包括用于指示所述第一终端测量获得的信号质量的信息；
    所述处理模块，还用于根据所述测量报告，确定所述第一终端满足所述切换条件。
  44. 根据权利要求42或43所述的装置，其特征在于，所述处理模块，还用于释放所述第一终端与所述第一网络设备之间的第一无线资源控制连接。
  45. 一种通信装置，其特征在于，包括：
    处理模块，用于确定第一终端与第一网络设备之间是否存在属于所述第一终端的会话，所述第一终端为第二终端接入所述第一网络设备的中继设备；
    收发模块，用于在不存在所述属于所述第一终端的会话时，向所述第一终端发送第一无线资源控制重配消息，所述第一无线资源控制重配消息包括用于指示至少一个不可测量小区和/或所述第一网络设备覆盖的至少一个可测量小区的信息。
  46. 根据权利要求45所述的装置，其特征在于，所述收发模块，还用于：
    在存在所述属于所述第一终端的会话时，向所述第一终端发送第二无线资源控制重配消息，所述第二无线资源控制重配消息包括用于指示所述第一网络设备覆盖的小区和/或其他小区的信息，所述其他小区为所述第一网络设备覆盖的小区外的小区。
  47. 根据权利要求46所述的装置，其特征在于，所述第二无线资源控制重配消息包括以下任一项或多项：至少一个测量事件、可测量小区白名单、或不可测量小区黑名单，所述可测量小区白名单包括所述第一网络设备的覆盖范围内或覆盖范围外的至少一个可测量小区，所述不可测量小区黑名单包括至少一个不可测量小区。
  48. 根据权利要求45至47中任一项所述的装置，其特征在于，所述收发模块，还用于接收来自于所述第一终端的第一测量报告，所述第一测量报告根据第二无线资源控制重配消息或所述第一无线资源控制重配消息确定。
  49. 根据权利要求45至48中任一项所述的装置，其特征在于，所述收发模块，还用于在确定第一终端与第一网络设备之间存在属于所述第一终端的会话前，接收来自于所述第一终端的第二测量报告，所述第二测量报告包括用于指示所述第一终端测量获得的信号质量的信息；
    所述处理模块，还用于根据所述第二测量报告，确定所述第一终端满足切换条件。
  50. 一种通信装置，其特征在于，包括：
    收发模块，用于在第一终端与第一网络设备之间不存在属于所述第一终端的会话时，接收来自于所述第一网络设备的第一无线资源控制重配消息，所述第一无线资源控制重配消息包括用于指示至少一个不可测量小区和/或所述第一网络设备覆盖的至少一个可测量小区的信息，所述第一终端为第二终端接入所述第一网络设备的中继设备；
    处理模块，用于根据所述第一无线资源控制重配消息，进行信号测量。
  51. 根据权利要求50所述的装置，其特征在于，所述收发模块，还用于在存在所述属于所述第一终端的会话时，接收来自于所述第一网络设备的第二无线资源控制重配消息，所述第二无线资源控制重配消息包括用于指示所述第一网络设备覆盖的小区和/或其他小区的信息，所述其他小区为所述第一网络设备覆盖的小区外的小区；
    所述处理模块，还用于根据所述第二无线资源控制重配消息，进行信号测量。
  52. 根据权利要求51所述的装置，其特征在于，所述第二无线资源控制重配消息包括以下任一项或多项：至少一个测量事件、可测量小区白名单、或不可测量小区黑名单，所述可测量小区白名单包括所述第一网络设备的覆盖范围内或覆盖范围外的至少一个可测量小区，所述不可测量小区黑名单包括至少一个不可测量小区。
  53. 根据权利要求50至52中任一项所述的装置，其特征在于，所述收发模块，还用于向所述第一网络设备发送第一测量报告，所述第一测量报告根据第二无线资源控制重配消息或所述第一无线资源控制重配消息确定。
  54. 根据权利要求50至53中任一项所述的装置，其特征在于，所述收发模块，还用于在接收来自于所述第一网络设备的第二无线资源控制重配消息或所述第一无线资源控制重配消息前，向所述第一网络设备发送第二测量报告，所述第二测量报告包括用于指示所述第一终端测量获得的信号质量的信息。
  55. 一种通信装置，其特征在于，所述通信装置包括：至少一个处理器和通信接口，所述通信接口用于所述终端与其他通信装置进行信息交互，当程序指令在所述至少一个处理器中执行时，使得所述通信装置执行如权利要求1至14、或23至27中任一项所述的方法。
  56. 一种通信装置，其特征在于，所述通信装置包括：至少一个处理器和通信接口，所述通信接口用于所述终端与其他通信装置进行信息交互，当程序指令在所述至少一个处理器中执行时，使得所述通信装置执行如权利要求15至17、或18至22中任一项所述的方法。
  57. 一种计算机程序产品，其特征在于，包括程序指令，当所述程序指令被执行时，如权利要求1至27中任一项所述的方法被执行。
  58. 一种计算机可读存储介质，其特征在于，所述计算机可读介质存储用于设备执行的程序代码，当所述程序指令被执行时，如权利要求1至27中任一项所述的方法被执行。
  59. 一种芯片，其特征在于，所述芯片包括至少一个处理器，当程序指令被所述至少一个处理器中执行时，使得如权利要求1至27中任一项所述的方法被执行。
  60. 一种通信系统，包括权利要求55所述的通信装置、权利要求56所述的通信装置以及所述第二终端。
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