WO2021254011A1 - 通信方法及装置 - Google Patents

通信方法及装置 Download PDF

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Publication number
WO2021254011A1
WO2021254011A1 PCT/CN2021/091760 CN2021091760W WO2021254011A1 WO 2021254011 A1 WO2021254011 A1 WO 2021254011A1 CN 2021091760 W CN2021091760 W CN 2021091760W WO 2021254011 A1 WO2021254011 A1 WO 2021254011A1
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WO
WIPO (PCT)
Prior art keywords
cell
relay device
handover
indication information
terminal device
Prior art date
Application number
PCT/CN2021/091760
Other languages
English (en)
French (fr)
Inventor
刘星
Original Assignee
展讯通信（上海）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
Application filed by 展讯通信（上海）有限公司 filed Critical 展讯通信（上海）有限公司
Priority to EP21826352.3A priority Critical patent/EP4171118A4/en
Priority to US18/011,507 priority patent/US20230300698A1/en
Publication of WO2021254011A1 publication Critical patent/WO2021254011A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • 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
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • 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
    • H04W36/0064—Transmission or use of information for re-establishing the radio link of control information between different access points
    • 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
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • 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
    • H04W36/0009—Control or signalling for completing the hand-off for a plurality of users or terminals, e.g. group communication or moving wireless networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/03—Reselecting a link using a direct mode connection
    • H04W36/033—Reselecting a link using a direct mode connection in pre-organised networks
    • 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

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a communication method and device.
  • a relay device in order to increase the transmission coverage, can be introduced between the terminal and the base station.
  • the relay device can forward the data of the terminal to the base station and the data of the base station to the terminal.
  • the relay device Since the relay device can be moved, when the connection between the relay device and the terminal remains unchanged, and the relative movement between the relay device and the base station occurs, the relay device and the terminal need to perform group switching, switching from one base station to another. A base station, at the same time, the connection relationship between the relay device and the terminal remains unchanged.
  • the signal between the relay device and the base station is usually already poor.
  • the current solution is to use conditional handover, that is, to send the handover command to the relay device in advance to switch
  • the command includes multiple possible target base stations and corresponding handover conditions. The relay device does not immediately perform the switching operation, but only performs the switching when the switching conditions are met.
  • the above solution can avoid the problem of handover failure caused by the failure of the relay device to receive the handover command.
  • the terminal since the triggering of handover and the selection of the target base station are both determined by the relay device, the terminal cannot know which target base station is finally selected.
  • the embodiments of the present application provide a communication method and device to solve the problem that the terminal device cannot know which target cell is finally selected during the group handover process.
  • an embodiment of the present application provides a communication method, including:
  • the relay device obtains the handover conditions of multiple preset cells from the first cell, and for any cell i among the multiple preset cells, the handover condition of the cell i is that the relay device is from the first cell Handover conditions for handover to the cell i;
  • the relay device When the relay device meets the handover condition of the second cell, the relay device establishes a connection with the second cell, and the second cell is any one of the plurality of preset cells;
  • the relay device sends first indication information to the terminal device, where the first indication information indicates that the relay device establishes a connection with the second cell.
  • the first indication information includes the identity of the second cell.
  • the relay device acquiring the handover conditions of multiple preset cells from the first cell includes:
  • the relay device obtains a radio resource control RRC message from the first cell, and the RRC message includes handover conditions of the multiple preset cells.
  • the RRC message further includes configuration information of each of the multiple preset cells; the establishment of a connection between the relay device and the second cell includes:
  • the relay device establishes a connection with the second cell according to the configuration information of the second cell.
  • the method before the relay device establishes a connection with the second cell, the method further includes:
  • the relay device sends second instruction information to the terminal device, where the second instruction information instructs the relay device to start switching from the first cell to one of the plurality of preset cells. operate.
  • the handover condition of the second cell is:
  • the signal strength between the relay device and the second cell is greater than or equal to a preset strength.
  • the method further includes:
  • the relay device receives data from the terminal device and sends the data to the second cell.
  • an embodiment of the present application provides a communication method, including:
  • the terminal device receives first indication information from the relay device, where the first indication information instructs the relay device to switch from the first cell to the second cell and establish a connection with the second cell;
  • the terminal device sends data to the second cell through the relay device according to the first instruction information.
  • the first indication information includes the identity of the second cell.
  • the method before the terminal device receives the first indication information from the relay device, the method further includes:
  • the terminal device receives second indication information from the relay device, the second indication information instructs the relay device to start to perform an operation of switching from the first cell to one of a plurality of preset cells, so The second cell is one of the multiple preset cells.
  • an embodiment of the present application provides a communication method, including:
  • the relay device obtains the handover conditions of multiple preset cells from the first cell, and for any cell i among the multiple preset cells, the handover condition of the cell i is that the relay device is from the first cell Handover conditions for handover to the cell i;
  • the relay device When the relay device satisfies any one of the handover conditions of the multiple preset cells, the relay device sends second instruction information to the terminal device, and the second instruction information instructs the relay device to start Performing an operation of switching from the first cell to one of a plurality of preset cells;
  • the relay device establishes a connection with a second cell, the second cell is one of the plurality of preset cells, and the relay device satisfies a handover condition of the second cell.
  • the relay device acquiring the handover conditions of multiple preset cells from the first cell includes:
  • the relay device obtains a radio resource control RRC message from the first cell, and the RRC message includes handover conditions of the multiple preset cells.
  • the RRC message further includes configuration information of each of the multiple preset cells; the establishment of a connection between the relay device and the second cell includes:
  • the relay device establishes a connection with the second cell according to the configuration information of the second cell.
  • the handover condition of the second cell is:
  • the signal strength between the relay device and the second cell is greater than or equal to a preset strength.
  • the method further includes:
  • the relay device sends first indication information to the terminal device, where the first indication information indicates that the relay device establishes a connection with the second cell.
  • the first indication information includes the identity of the second cell.
  • the method further includes:
  • an embodiment of the present application provides a communication method, including:
  • the terminal device receives second instruction information from the relay device, where the second instruction information instructs the relay device to start an operation of switching from the first cell to one of the plurality of preset cells;
  • the terminal device stops sending data to the first cell through the relay device according to the second instruction information.
  • the method further includes:
  • the terminal device receives first indication information from the relay device, the first indication information instructs the relay device to switch from the first cell to the second cell and establish a connection with the second cell, the first The second cell is one of the multiple preset cells;
  • the terminal device sends data to the second cell through the relay device according to the first instruction information.
  • the first indication information includes the identity of the second cell.
  • an embodiment of the present application provides a communication device, including:
  • the obtaining module is configured to obtain handover conditions of multiple preset cells from the first cell, and for any cell i among the multiple preset cells, the handover condition of the cell i is that the relay device is from the first cell Handover conditions for handover to the cell i;
  • connection module is configured to establish a connection between the relay device and the second cell when the relay device meets the handover condition of the second cell, and the second cell is any one of the plurality of preset cells;
  • the sending module is configured to send first indication information to a terminal device, where the first indication information instructs the relay device to establish a connection with the second cell.
  • the first indication information includes the identity of the second cell.
  • the acquisition module is specifically configured to:
  • the RRC message further includes configuration information of each of the multiple preset cells; the connection module is specifically configured to:
  • the sending module is further configured to: before the relay device establishes a connection with the second cell:
  • the handover condition of the second cell is:
  • the signal strength between the relay device and the second cell is greater than or equal to a preset strength.
  • the acquisition module is further used for:
  • an embodiment of the present application provides a communication device, including:
  • a receiving module configured to receive first indication information from a relay device, the first indication information instructing the relay device to switch from a first cell to a second cell and establish a connection with the second cell;
  • the sending module is configured to send data to the second cell through the relay device according to the first indication information.
  • the first indication information includes the identity of the second cell.
  • the receiving module is further configured to, before the terminal device receives the first indication information from the relay device:
  • the second indication information instructing the relay device to start the operation of switching from the first cell to one of a plurality of preset cells, the second cell Is one of the multiple preset cells.
  • an embodiment of the present application provides a communication device, including:
  • the obtaining module is configured to obtain handover conditions of multiple preset cells from the first cell, and for any cell i among the multiple preset cells, the handover condition of the cell i is that the relay device is from the first cell Handover conditions for handover to the cell i;
  • the sending module is configured to: when the relay device satisfies any one of the handover conditions of the multiple preset cells, the relay device sends second indication information to the terminal device, and the second indication information indicates the The relay device starts to perform an operation of switching from the first cell to one of a plurality of preset cells;
  • the connection module is configured to establish a connection between the relay device and a second cell, where the second cell is one of the multiple preset cells, and the relay device satisfies the handover condition of the second cell.
  • the acquisition module is specifically configured to:
  • the RRC message further includes configuration information of each of the multiple preset cells; the connection module is specifically configured to:
  • the handover condition of the second cell is:
  • the signal strength between the relay device and the second cell is greater than or equal to a preset strength.
  • the sending module is further configured to: after the relay device establishes a connection with the second cell:
  • the first indication information includes the identity of the second cell.
  • the acquisition module is further used for:
  • an embodiment of the present application provides a communication device, including:
  • a receiving module configured to receive second indication information from a relay device, where the second indication information instructs the relay device to start an operation of switching from the first cell to one of a plurality of preset cells;
  • the processing module is configured to stop sending data to the first cell through the relay device according to the second instruction information.
  • the receiving module is further configured to:
  • Receive first indication information from the relay device instructs the relay device to switch from the first cell to the second cell and establish a connection with the second cell, and the second cell is One of the multiple preset cells;
  • the terminal device sends data to the second cell through the relay device according to the first instruction information.
  • the first indication information includes the identity of the second cell.
  • an embodiment of the present application provides a relay device, including: at least one processor and a memory;
  • the memory stores computer execution instructions
  • the at least one processor executes computer-executable instructions stored in the memory, so that the at least one processor executes the communication method according to any one of the first aspect, or causes the at least one processor to execute the third The communication method according to any one of the aspects.
  • an embodiment of the present application provides a terminal device, including: at least one processor and a memory;
  • the memory stores computer execution instructions
  • the at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor executes the communication method according to any one of the second aspect, or causes the at least one processor to execute the fourth The communication method according to any one of the aspects.
  • an embodiment of the present application provides a computer-readable storage medium having computer-executable instructions stored in the computer-readable storage medium.
  • the processor executes the computer-executable instructions, the computer-readable The communication method described in any one of the four aspects.
  • the relay device first obtains the handover conditions of multiple preset cells from the first cell, and for any cell i among the multiple preset cells, the handover condition of the cell i is the relay device Handover conditions for handover from the first cell to cell i; when the relay device meets the handover conditions for the second cell, the relay device establishes a connection with the second cell, and the second cell is any one of a plurality of preset cells; and finally , The relay device sends the first indication information to the terminal device to instruct the relay device to establish a connection with the second cell.
  • the relay device after the relay device establishes a connection with the second cell, the relay device informs the terminal device that a connection has been established with the second cell through the first indication information, so that the terminal device can learn the completion of the relay device handover Timing and selection of the target cell for handover, so that the terminal device can interact with the second cell after handover through the relay device.
  • FIG. 1 is a schematic diagram of uplink and downlink and side links provided by an embodiment of this application;
  • FIG. 2 is a schematic diagram of the link connection of the relay provided in an embodiment of the application.
  • FIG. 3 is a schematic diagram of group switching provided by an embodiment of the application.
  • Fig. 4 is a schematic diagram of a relay device group switching provided by the prior art
  • FIG. 5 is a schematic flowchart of a communication method provided by an embodiment of this application.
  • Figure 6 is a signaling diagram of a communication method provided by an embodiment of the application.
  • FIG. 7 is a schematic flowchart of a communication method provided by another embodiment of this application.
  • FIG. 8 is a schematic flowchart of a communication method provided by another embodiment of this application.
  • FIG. 9 is a schematic flowchart of a communication method provided by another embodiment of this application.
  • FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 11 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 12 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 13 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 14 is a schematic diagram of the hardware structure of a relay device provided by an embodiment of the application.
  • FIG. 15 is a schematic diagram of the hardware structure of a terminal device provided by an embodiment of the application.
  • Terminal equipment usually has a wireless transceiver function, terminal equipment can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; can also be deployed on the water (such as ships, etc.); can also be deployed in the air (such as airplanes, balloons, etc.) And satellite class).
  • the terminal equipment may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiver function, virtual reality (VR) terminal equipment, augmented reality (AR) terminal equipment, industrial Wireless terminals in industrial control, in-vehicle terminal equipment, wireless terminals in self-driving (self-driving), wireless terminal equipment in remote medical, wireless terminal equipment in smart grid, Wireless terminal equipment in transportation safety, wireless terminal equipment in smart city, wireless terminal equipment in smart home, wearable terminal equipment, etc.
  • VR virtual reality
  • AR augmented reality
  • the terminal equipment involved in the embodiments of the present application may also be referred to as a terminal, user equipment (UE), access terminal equipment, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station , Remote terminal equipment, mobile equipment, UE terminal equipment, wireless communication equipment, UE agent or UE device, etc.
  • the terminal device can also be fixed or mobile.
  • RRC radio resource control, radio resource control.
  • conditional handover that is, the handover command will be sent to the device that needs cell handover in advance, including the configuration information of multiple possible cells and the conditions for each handover.
  • the device does not immediately perform the switching operation, but waits for the condition to be met before performing the switching operation.
  • Relay equipment also known as relay (relay)
  • relay is a transmission path between two switching centers.
  • a relay device in order to increase the transmission coverage, a relay device can be introduced between the sender and the receiver, and the relay device can forward the received data to the receiver, thereby expanding the sending range of the sender.
  • a relay device can be introduced between the base station and the terminal device, and the relay device is responsible for forwarding the data of the terminal device to the base station, or forwarding the data of the base station to the terminal device.
  • SSL communication technology also known as thing-to-thing direct communication technology
  • thing-to-thing direct communication technology is a communication technology that is different from ordinary wireless cellular network communication.
  • terminal equipment and network equipment communicate At this time, the link between the terminal device and the network device is called an uplink (Uplink) or a downlink (Downlink), and the interface is called a Uu interface.
  • Uplink uplink
  • Downlink downlink
  • the interface is called a Uu interface.
  • the terminal device and the terminal device communicate directly.
  • the link between the terminal device and the terminal device is called the direct link
  • the interface is called the PC5 interface
  • the side link can also be called the direct link. Connect the link.
  • Figure 1 is a schematic diagram of uplink and downlink and side links provided by an embodiment of the application.
  • the base station 10 can send downlink data to the terminal 11 via the downlink, and the terminal 11 can send uplink data to the base station 10 via the uplink.
  • the terminal 11 can send data to the terminal 12, and the terminal 12 can also send data to the terminal 11.
  • the introduction of the side link was originally to realize that the terminal devices that are relatively close can communicate directly, and the data does not need to be forwarded through the base station to reduce the transmission delay. Later, based on the introduction of side links, a side link relay was designed. The previous relay used uplink and downlink communication technology between the relay and the terminal device, while the side link relay used the side link for the link between the relay device and the terminal device. Technology.
  • FIG. 2 is a schematic diagram of a link connection of a relay provided in an embodiment of the application. As shown in FIG. 2, it includes a base station 20, a relay device 21, and a terminal device 22.
  • the relay device 21 and the base station 20 adopt uplink and downlink communication technologies.
  • the base station 20 can send downlink data to the relay device 21 via the downlink, and the relay device 21 can transmit data to the relay device 21 via the uplink.
  • the base station 20 transmits uplink data.
  • the relay device 21 and the terminal device 22 also use uplink and downlink communication technologies.
  • the relay device 21 can send the downlink data sent by the base station 20 to the terminal via the downlink.
  • the device 22 and the terminal device 22 may send uplink data to the relay device 22 via the uplink, and the relay device 22 forwards the uplink data to the base station 20.
  • the relay device 21 and the terminal device 22 adopt a direct link communication technology to directly transmit data.
  • a base station when a base station is directly connected to a terminal device, since the terminal device is movable, it may move from the coverage area of one base station to the coverage area of another base station. At this time, the terminal device needs to perform handover.
  • the relay device for the relay device, the relay device is also movable. When the connection between the relay device and the terminal device remains unchanged, but there is a movement between the relay device and the base station or cell, the phenomenon of group handover will occur, that is, the relay device and the terminal device are all from the same
  • the base station is switched to another base station, or the relay device and the terminal device are both switched from one cell to another cell, and the connection relationship between the relay device and the terminal device remains unchanged.
  • FIG. 3 is a schematic diagram of a group handover provided by an embodiment of the application. As shown in FIG. 3, it includes a terminal device 31, a relay device 32, a base station 33, and a base station 34. The connection between the terminal device 31 and the relay device 32 remains unchanged. When the terminal device 31 and the relay device 32 move, they switch from the base station 33 to the base station 34, that is, a group switch occurs.
  • the source base station sends a handover command to the terminal equipment.
  • the terminal device receives the handover command, it will immediately start the handover operation.
  • the terminal device needs to perform handover it usually occurs when the signal between the terminal device and the source base station is already bad, so it may happen that the handover command sent by the source base station cannot be successfully received by the terminal device. Cannot perform switchover. If a handover command is sent to the terminal device in advance when the signal between the terminal device and the source base station is relatively good, it may cause the terminal device to switch prematurely.
  • 3GPP introduced a conditional handover scheme.
  • the source base station will send a handover command to the terminal device in advance.
  • the handover command includes the configuration information of multiple possible target base stations and the respective handover conditions of each target base station.
  • the terminal device After receiving the switching command, the terminal device does not immediately perform the switching operation, but judges whether it meets the switching conditions.
  • the handover is performed only after the handover condition corresponding to a certain target base station is met.
  • the handover command includes 5 cells, cells 1-5.
  • the terminal device receives the handover command, it continuously monitors the signal strength of these 5 cells.
  • the signal strength of cell 3 is greater than the preset threshold (at this time, cell 3
  • the handover condition is that the signal strength of cell 3 is greater than the preset threshold), and the signal strength of this cell is lower than the preset threshold, the operation of handover to cell 3 is performed.
  • the same conditional handover method can be used.
  • the relay equipment receives the configuration information of multiple target cells and their respective handover conditions. , When the relay device meets the handover conditions, it selects a target cell to complete the handover.
  • Fig. 4 is a schematic diagram of relay device group switching provided by the prior art, as shown in Fig. 4, including:
  • the relay device sends a measurement result to the first cell.
  • S42 The first cell sends a handover request to the second cell.
  • S43 The second cell sends a handover command to the first cell.
  • the second cell After allowing the relay device to switch to the second cell, the second cell sends a handover command to the first cell.
  • S44 The first cell sends a handover command to the relay device.
  • the relay device sends a switching command to the terminal device.
  • S46 The terminal device sends a handover command response to the relay device.
  • the relay device establishes a connection with the second cell.
  • a connection with the second cell can be established through random access.
  • the handover condition is generally that the signal strength between the relay device and the potential target cell meets a certain threshold
  • the final handover trigger and target cell selection are all determined by the relay device.
  • the device does not know when the cell handover is triggered, nor does it know which target cell is selected for the handover. Therefore, the embodiment of the present application provides a solution, so that the terminal device can learn the trigger of the cell handover and the selected target cell. It will be introduced below.
  • FIG. 5 is a schematic flowchart of a communication method provided by an embodiment of the application, as shown in FIG. 5, including:
  • the relay device obtains the handover conditions of multiple preset cells from the first cell, and for any cell i among the multiple preset cells, the handover condition of the cell i is that the relay device is from the first cell.
  • the relay device is initially connected to the first cell, and through the relay device, data transmission can be performed between the terminal device and the first cell.
  • the relay device and the terminal device are kept within a certain distance range, so that the connection between the relay device and the terminal device can be maintained without switching.
  • a cell handover may be required. For example, when the terminal device and the relay device move out of the coverage of the first cell, the terminal device and the relay device need to switch to another cell, that is, the second cell. At this time, the connection relationship maintained between the terminal device and the relay device remains unchanged, and both the relay device and the terminal device need to be handed over from the first cell to the second cell, that is, a group handover is performed.
  • the first cell will send to the relay device the handover conditions of multiple preset cells.
  • the relay device meets the handover conditions of any cell i among the multiple preset cells, the relay The device will switch from the first cell to this cell i.
  • the second cell is one of a plurality of preset cells, and the relay device meets the handover condition of the second cell, the relay device will be handed over from the first cell to the second cell.
  • the relay device When the relay device starts to perform cell handover, the relay device will disconnect from the first cell and try to establish a connection with the second cell.
  • the relay device sends first indication information to a terminal device, where the first indication information instructs the relay device to establish a connection with the second cell.
  • the relay device After the relay device successfully establishes a connection with the second cell, the relay device sends first indication information to the terminal device, indicating that the relay device successfully establishes a connection with the second cell. After receiving the first indication information, the terminal device can learn that the relay device has switched to the second cell according to the first indication information. At this time, the terminal device can stop communicating with the first cell through the relay device, and can start communicating with the second cell through the relay device.
  • the relay device obtains the handover conditions of multiple preset cells from the first cell.
  • the handover condition of the cell i is that the relay device starts from the first cell.
  • the relay device sends the first indication information to the terminal device to instruct the relay device to establish a connection with the second cell.
  • the relay device after the relay device establishes a connection with the second cell, the relay device informs the terminal device that a connection has been established with the second cell through the first indication information, so that the terminal device can learn the completion of the relay device handover Timing and selection of the target cell for handover, so that the terminal device can interact with the second cell after handover through the relay device.
  • the relay device When the relay device and the terminal device need to perform cell handover due to location changes and other reasons, the relay device needs to receive a handover command from the first cell. Wherein, when the relay device needs to handover from the first cell to the second cell, the first cell sends a handover request to the second cell. If the second cell allows the relay device to switch, the second cell will send a handover command to the first cell, and the first cell will send the handover command to the relay device.
  • the first indication information includes the identity of the second cell.
  • the terminal device can learn that the relay device is handed over from the first cell to the second cell according to the identity of the second cell included in the first indication information.
  • the relay device may obtain an RRC message from the first cell, and the RRC message includes handover conditions of multiple preset cells.
  • the RRC message also includes configuration information of each of the multiple preset cells.
  • the relay device can obtain the configuration information of the second cell, and establish a connection with the second cell according to the configuration information of the second cell.
  • the handover condition of the second cell is that the signal strength between the relay device and the second cell is greater than or equal to a preset strength.
  • the handover condition of cell i is that the signal strength between the relay device and cell i is greater than or equal to a certain signal strength, and the signal strength corresponding to different cells can be the same. It can also be different.
  • the relay device may also send second indication information to the terminal device, instructing the relay device to start switching from the first cell to one of the multiple preset cells Operation.
  • the terminal device After the relay device obtains the handover conditions of multiple preset cells from the first cell, the terminal device does not know when the relay device is ready to perform cell handover at this time, nor does it know which cell the selected cell is.
  • the first instruction information is sent by the relay device to the terminal device after the connection between the relay device and the second cell is successfully established. Before that, the second instruction information is used to inform the relay device that it is about to start the cell handover operation, that is, the first
  • the second indication information indicates that the relay device starts to perform an operation of switching from the first cell to one of the plurality of preset cells. According to the second instruction information, the terminal device stops communicating with the first cell through the relay device, and stops sending data for the first cell to the first cell through the relay device.
  • the second indication information only informs the relay device that the cell handover is about to be performed, but does not include the identity of the target cell that the relay device will handover. This is because when the relay device meets the handover condition of a certain cell i, Try to connect with cell i, but the connection may fail. At this time, the relay device will select a cell that meets the conditions among other cells and try to establish a connection again. Until the relay device successfully establishes a connection with the second cell, the relay device informs the terminal device that the target cell for handover is the second cell through the first indication information.
  • the terminal device After the terminal device receives the first indication information, it can send data to the second cell through the relay device according to the first indication information.
  • Fig. 6 is a signaling diagram of a communication method provided by an embodiment of the application, as shown in Fig. 6, including:
  • the relay device reports a measurement result to the first cell.
  • the relay device can obtain the measurement results of one or more nearby cells and report to the first cell.
  • S602 The first cell receives a measurement result.
  • the first cell After the relay device reports the measurement result to the first cell, the first cell receives the measurement result, and determines multiple preset cells according to the received measurement results, as well as configuration information of each preset cell, and various handover conditions.
  • the relay device sends an RRC message (that is, a handover command) to the terminal device.
  • the RRC message includes handover conditions of multiple preset cells and configuration information of multiple preset cells.
  • the terminal device After receiving the RRC message, the terminal device can learn the handover conditions of multiple preset cells and the configuration information of multiple preset cells.
  • S604 The terminal device sends a handover command response to the relay device.
  • S605 The relay device determines that the handover condition of the second cell is satisfied.
  • the relay device sends second indication information to the terminal device.
  • S607 The terminal device receives the second indication information.
  • the second indication information instructs the relay device to start the operation of switching from the first cell to one of the multiple preset cells.
  • the terminal device does not yet know which target cell the relay device selects, but it can know the relay The device has disconnected from the first cell and started to try to access another cell. Therefore, after receiving the second indication information, the terminal device can stop sending data for the first cell to the relay device, and stop communicating with the first cell through the relay device.
  • the relay device establishes a connection with the second cell.
  • S609 The relay device sends the first indication information to the terminal device.
  • S610 The terminal device receives the first indication information.
  • the first indication information includes the identity of the second cell. According to the first indication information, the terminal device can learn that the relay device has completed the cell handover and switched to the second cell.
  • FIG. 7 is a schematic flowchart of a communication method provided by another embodiment of this application, as shown in FIG. 7, including:
  • the terminal device receives first indication information from the relay device, where the first indication information instructs the relay device to switch from the first cell to the second cell and establish a connection with the second cell;
  • the terminal device sends data to the second cell through the relay device according to the first indication information
  • the first indication information includes the identity of the second cell.
  • the method before the terminal device receives the first indication information from the relay device, the method further includes:
  • the terminal device receives second indication information from the relay device, the second indication information instructs the relay device to start to perform an operation of switching from the first cell to one of a plurality of preset cells, so The second cell is one of the multiple preset cells.
  • the solution of the embodiment illustrated in FIG. 7 is a method on the terminal device side corresponding to the solutions illustrated in FIG. 5 to FIG. 6. Its steps and principles have been introduced in the above-mentioned embodiment. For specific implementation, please refer to the above-mentioned embodiment. Go into details.
  • FIG. 8 is a schematic flowchart of a communication method provided by another embodiment of this application, as shown in FIG. 8, including:
  • the relay device obtains handover conditions of multiple preset cells from the first cell, and for any cell i among the multiple preset cells, the handover condition of the cell i is that the relay device is from the first cell.
  • the relay device is initially connected to the first cell, and through the relay device, data transmission can be performed between the terminal device and the first cell.
  • the relay device and the terminal device are kept within a certain distance range, so that the connection between the relay device and the terminal device can be maintained without switching.
  • a cell handover may be required. For example, when the terminal device and the relay device move out of the coverage of the first cell, the terminal device and the relay device need to switch to another cell, that is, the second cell. At this time, the connection relationship maintained between the terminal device and the relay device remains unchanged, and both the relay device and the terminal device need to be handed over from the first cell to the second cell, that is, a group handover is performed.
  • the relay device When the relay device satisfies any one of the handover conditions of the multiple preset cells, the relay device sends second indication information to the terminal device, where the second indication information indicates the relay The device starts to perform an operation of switching from the first cell to one of the multiple preset cells.
  • the relay device Before the relay device performs cell handover, the relay device first sends second indication information to the terminal device to instruct the terminal device that the relay device is about to perform cell handover and disconnect from the first cell. After receiving the second indication information, the terminal device may stop communicating with the first cell through the relay device, and stop sending data to the first cell through the relay device.
  • the relay device establishes a connection with a second cell, where the second cell is one of the multiple preset cells, and the relay device satisfies a handover condition of the second cell.
  • the second cell is one of a plurality of preset cells, and the relay device meets the handover condition of the second cell, the relay device will be handed over from the first cell to the second cell.
  • the relay device When the relay device starts to perform cell handover, the relay device will disconnect from the first cell and try to establish a connection with the second cell.
  • the manner in which the relay device obtains the handover conditions of multiple preset cells from the first cell may be:
  • the relay device obtains a radio resource control RRC message from the first cell, and the RRC message includes handover conditions of the multiple preset cells.
  • the RRC message further includes configuration information of each of the plurality of preset cells; the method for establishing a connection between the relay device and the second cell may be:
  • the relay device establishes a connection with the second cell according to the configuration information of the second cell.
  • the handover condition of the second cell is:
  • the signal strength between the relay device and the second cell is greater than or equal to a preset strength.
  • the relay device may send first indication information to the terminal device, where the first indication information indicates that the relay device is connected to the second cell.
  • the cell establishes a connection.
  • the terminal device can learn that the relay device has switched from the first cell to the second cell.
  • the terminal device can communicate with the second cell through the relay device according to the configuration information of the second cell in the RRC cell. Communication.
  • the first indication information includes the identity of the second cell
  • the terminal device learns that the target cell selected by the relay device is the second cell according to the identity of the second cell.
  • the relay device may receive data from the terminal device and send the data to the second cell.
  • FIG. 9 is a schematic flowchart of a communication method provided by another embodiment of this application, as shown in FIG. 9, including:
  • the terminal device receives second indication information from the relay device, where the second indication information instructs the relay device to start an operation of switching from the first cell to one of a plurality of preset cells;
  • S92 The terminal device stops sending data to the first cell through the relay device according to the second instruction information.
  • the method further includes:
  • the terminal device receives first indication information from the relay device, the first indication information instructs the relay device to switch from the first cell to the second cell and establish a connection with the second cell, the first The second cell is one of the multiple preset cells;
  • the terminal device sends data to the second cell through the relay device according to the first instruction information.
  • the first indication information includes the identity of the second cell.
  • the solution of the embodiment illustrated in FIG. 9 is a method on the terminal device side corresponding to the solution illustrated in FIG.
  • the relay device first obtains the handover conditions of multiple preset cells from the first cell, and for any cell i among the multiple preset cells, the handover condition of the cell i is the relay device Handover conditions for handover from the first cell to cell i; when the relay device meets the handover conditions for the second cell, the relay device establishes a connection with the second cell, and the second cell is any one of a plurality of preset cells; and finally , The relay device sends the first indication information to the terminal device to instruct the relay device to establish a connection with the second cell.
  • the relay device after the relay device establishes a connection with the second cell, the relay device informs the terminal device that a connection has been established with the second cell through the first indication information, so that the terminal device can learn the completion of the relay device handover Timing and selection of the target cell for handover, so that the terminal device can interact with the second cell after handover through the relay device. Further, before the relay device starts to perform cell handover, the relay device may send second indication information to the terminal device, indicating that the relay device is about to start cell handover, and the terminal device may stop after receiving the second indication information. Communicate with the first cell through the relay device, saving signaling resources.
  • FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of the application.
  • the communication device 100 includes an acquisition module 101, a connection module 102, and a sending module 103, where:
  • the obtaining module 101 is configured to obtain handover conditions of a plurality of preset cells from a first cell. For any cell i among the plurality of preset cells, the handover condition of the cell i is that the relay device is from the first cell Handover conditions for handover to the cell i;
  • connection module 102 is configured to establish a connection between the relay device and the second cell when the relay device meets the handover condition of the second cell, and the second cell is any one of the plurality of preset cells;
  • the sending module 103 is configured to send first indication information to a terminal device, where the first indication information instructs the relay device to establish a connection with the second cell.
  • the first indication information includes the identity of the second cell.
  • the obtaining module 101 is specifically configured to:
  • the RRC message further includes configuration information of each of the multiple preset cells; the connection module 102 is specifically configured to:
  • the sending module 103 is further configured to: before the relay device establishes a connection with the second cell:
  • the handover condition of the second cell is:
  • the signal strength between the relay device and the second cell is greater than or equal to a preset strength.
  • the obtaining module 101 is further configured to:
  • the device provided in the embodiment of the present application can be used to implement the technical solution of the foregoing method embodiment, and its implementation principles and technical effects are similar, and will not be repeated here.
  • the communication device shown in the embodiment of the present application may be a chip, a hardware module, a processor, and the like.
  • the communication device may have other forms, which are not specifically limited in the embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a communication device provided by an embodiment of the application. As shown in FIG. 11, the communication device 110 includes a receiving module 111 and a sending module 112, wherein:
  • the receiving module 111 is configured to receive first indication information from a relay device, where the first indication information indicates that the relay device switches from a first cell to a second cell and establishes a connection with the second cell;
  • the sending module 112 is configured to send data to the second cell through the relay device according to the first indication information.
  • the first indication information includes the identity of the second cell.
  • the receiving module 111 is further configured to: before the terminal device receives the first indication information from the relay device:
  • the second indication information instructing the relay device to start the operation of switching from the first cell to one of a plurality of preset cells, the second cell Is one of the multiple preset cells.
  • the device provided in the embodiment of the present application can be used to implement the technical solution of the foregoing method embodiment, and its implementation principles and technical effects are similar, and will not be repeated here.
  • the communication device shown in the embodiment of the present application may be a chip, a hardware module, a processor, and the like.
  • the communication device may have other forms, which are not specifically limited in the embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a communication device provided by an embodiment of the application.
  • the communication device 120 includes an acquiring module 121, a sending module 122, and a connecting module 123, wherein:
  • the obtaining module 121 is configured to obtain handover conditions of multiple preset cells from a first cell. For any cell i among the multiple preset cells, the handover condition of the cell i is that the relay device is from the first cell Handover conditions for handover to the cell i;
  • the sending module 122 is configured to: when the relay device satisfies any one of the handover conditions of the multiple preset cells, the relay device sends second indication information to the terminal device, and the second indication information indicates the The relay device starts to perform an operation of switching from the first cell to one of a plurality of preset cells;
  • the connection module 123 is configured to establish a connection between the relay device and a second cell, where the second cell is one of the multiple preset cells, and the relay device satisfies a handover condition of the second cell.
  • the obtaining module 121 is specifically configured to:
  • the RRC message further includes configuration information of each of the multiple preset cells; the connection module 123 is specifically configured to:
  • the handover condition of the second cell is:
  • the signal strength between the relay device and the second cell is greater than or equal to a preset strength.
  • the sending module 122 is further configured to: after the relay device establishes a connection with the second cell:
  • the first indication information includes the identity of the second cell.
  • the obtaining module 121 is further configured to:
  • the device provided in the embodiment of the present application can be used to implement the technical solution of the foregoing method embodiment, and its implementation principles and technical effects are similar, and will not be repeated here.
  • the communication device shown in the embodiment of the present application may be a chip, a hardware module, a processor, and the like.
  • the communication device may have other forms, which are not specifically limited in the embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a communication device provided by an embodiment of the application. As shown in FIG. 13, the communication device 130 includes a receiving module 131 and a processing module 132, wherein:
  • the receiving module 131 is configured to receive second indication information from a relay device, where the second indication information instructs the relay device to start an operation of switching from the first cell to one of a plurality of preset cells;
  • the processing module 132 is configured to stop sending data to the first cell through the relay device according to the second instruction information.
  • the receiving module 131 is further configured to:
  • Receive first indication information from the relay device instructs the relay device to switch from the first cell to the second cell and establish a connection with the second cell, where the second cell is One of the multiple preset cells;
  • the terminal device sends data to the second cell through the relay device according to the first instruction information.
  • the first indication information includes the identity of the second cell.
  • the device provided in the embodiment of the present application can be used to implement the technical solution of the foregoing method embodiment, and its implementation principles and technical effects are similar, and will not be repeated here.
  • the communication device shown in the embodiment of the present application may be a chip, a hardware module, a processor, and the like.
  • the communication device may have other forms, which are not specifically limited in the embodiment of the present application.
  • FIG. 14 is a schematic diagram of the hardware structure of a relay device provided by an embodiment of the application.
  • the relay device includes: at least one processor 141 and a memory 142. Among them, the processor 141 and the memory 142 are connected through a bus 143.
  • the model determination also includes a communication component.
  • the communication component may include a receiver and/or a transmitter.
  • At least one processor 141 executes the computer-executable instructions stored in the memory 142, so that the at least one processor 141 executes the above communication method.
  • FIG. 15 is a schematic diagram of the hardware structure of a terminal device provided by an embodiment of the application.
  • the terminal device includes: at least one processor 151 and a memory 152.
  • the processor 151 and the memory 152 are connected through a bus 153.
  • the model determination also includes a communication component.
  • the communication component may include a receiver and/or a transmitter.
  • At least one processor 151 executes the computer-executable instructions stored in the memory 152, so that the at least one processor 151 executes the above communication method.
  • the processor may be a central processing unit (English: Central Processing Unit, abbreviated as: CPU), or other general-purpose processors, digital signal processors (English: Central Processing Unit, or CPU for short). : Digital Signal Processor, abbreviated as: DSP), application specific integrated circuit (English: Application Specific Integrated Circuit, abbreviated as: ASIC), etc.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in combination with the application can be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the memory may include a high-speed RAM memory, and may also include a non-volatile storage NVM, such as at least one disk memory.
  • NVM non-volatile storage
  • the bus may be an Industry Standard Architecture (ISA) bus, Peripheral Component (PCI) bus, or Extended Industry Standard Architecture (EISA) bus, etc.
  • ISA Industry Standard Architecture
  • PCI Peripheral Component
  • EISA Extended Industry Standard Architecture
  • the bus can be divided into address bus, data bus, control bus and so on.
  • the buses in the drawings of this application are not limited to only one bus or one type of bus.
  • the present application also provides a computer-readable storage medium in which computer-executable instructions are stored.
  • the processor executes the computer-executable instructions, the communication method as described above is realized.
  • the above-mentioned computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable and removable Programmable Read Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Magnetic Disk or Optical Disk.
  • SRAM static random access memory
  • EEPROM electrically erasable and removable Programmable Read Only Memory
  • EPROM Erasable Programmable Read Only Memory
  • PROM Programmable Read Only Memory
  • ROM Read Only Memory
  • Magnetic Memory Flash Memory
  • Magnetic Disk Magnetic Disk or Optical Disk.
  • a readable storage medium may be any available medium that can be accessed by a general purpose or special purpose computer.
  • An exemplary readable storage medium is coupled to the processor, so that the processor can read information from the readable storage medium and can write information to the readable storage medium.
  • the readable storage medium may also be an integral part of the processor.
  • the processor and the readable storage medium may be located in Application Specific Integrated Circuits (ASIC for short).
  • ASIC Application Specific Integrated Circuits
  • the processor and the readable storage medium may also exist in the device as discrete components.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of the present application essentially or the part that contributes to the existing technology 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 (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disks or optical disks and other media that can store program codes. .
  • a person of ordinary skill in the art can understand that all or part of the steps in the foregoing method embodiments can be implemented by a program instructing relevant hardware.
  • the aforementioned program can be stored in a computer readable storage medium. When the program is executed, it executes the steps including the foregoing method embodiments; and the foregoing storage medium includes: ROM, RAM, magnetic disk, or optical disk and other media that can store program codes.

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Abstract

一种通信方法及装置，该方法包括：中继设备从第一小区获取多个预设小区的切换条件，针对多个预设小区中的任意小区i，小区i的切换条件为中继设备从第一小区切换至小区i的切换条件；在中继设备满足第二小区的切换条件时，中继设备与第二小区建立连接，第二小区为多个预设小区中的任意一个；中继设备向终端设备发送第一指示信息，第一指示信息指示中继设备与第二小区建立连接。

Description

通信方法及装置
本申请要求于2020年06月19日提交中国专利局、申请号为CN202010567294.1、申请名称为"通信方法及装置"的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及通信技术领域，尤其涉及一种通信方法及装置。
背景技术
在无线通信系统中，为了提高传输覆盖的范围，可以在终端和基站之间引入中继设备，中继设备可以将终端的数据转发给基站，将基站的数据转发给终端。
由于中继设备是可以移动的，当中继设备和终端之间的连接不变，而中继设备和基站之间发生相对移动时，中继设备和终端需要进行组切换，从一个基站切换到另一个基站，同时中继设备和终端之间保持连接关系不变。在需要进行组切换时，中继设备和基站的信号通常已经较差，为了避免中继设备接收不到切换命令，目前的方案是采用条件切换，即预先将切换命令发送给中继设备，切换命令中包括多个可能的目标基站和对应的切换条件。中继设备不立即执行切换操作，而是在满足切换条件时才执行切换。
上述方案能够避免中继设备接收不到切换命令而导致切换失败的问题，但是由于切换的触发和目标基站的选择均是由中继设备决定的，终端无法获知最终选择的是哪一个目标基站。
发明内容
本申请实施例提供一种通信方法及装置，以解决终端设备在组切换过程中无法获知最终选择的是哪一个目标小区的问题。
第一方面，本申请实施例提供一种通信方法，包括：
中继设备从第一小区获取多个预设小区的切换条件，针对所述多个预设 小区中的任意小区i，所述小区i的切换条件为所述中继设备从所述第一小区切换至所述小区i的切换条件；
在所述中继设备满足第二小区的切换条件时，所述中继设备与所述第二小区建立连接，所述第二小区为所述多个预设小区中的任意一个；
所述中继设备向终端设备发送第一指示信息，所述第一指示信息指示所述中继设备与所述第二小区建立连接。
在一种可能的实施方式中，所述第一指示信息中包括所述第二小区的标识。
在一种可能的实施方式中，中继设备从第一小区获取多个预设小区的切换条件，包括：
所述中继设备从第一小区获取无线资源控制RRC消息，所述RRC消息中包括所述多个预设小区的切换条件。
在一种可能的实施方式中，所述RRC消息中还包括所述多个预设小区中的每个小区的配置信息；所述中继设备与所述第二小区建立连接，包括：
所述中继设备根据所述RRC消息，获取所述第二小区的配置信息；
所述中继设备根据所述第二小区的配置信息，与所述第二小区建立连接。
在一种可能的实施方式中，在所述中继设备与所述第二小区建立连接之前，所述方法还包括：
所述中继设备向所述终端设备发送第二指示信息，所述第二指示信息指示所述中继设备开始执行从所述第一小区切换至所述多个预设小区中的一个小区的操作。
在一种可能的实施方式中，所述第二小区的切换条件为：
所述中继设备和所述第二小区之间的信号强度大于或等于预设强度。
在一种可能的实施方式中，所述方法还包括：
所述中继设备从所述终端设备接收数据，并向所述第二小区发送所述数据。
第二方面，本申请实施例提供一种通信方法，包括：
终端设备从中继设备接收第一指示信息，所述第一指示信息指示所述中继设备从第一小区切换至第二小区并与所述第二小区建立连接；
所述终端设备根据所述第一指示信息，通过所述中继设备向所述第二小 区发送数据。
在一种可能的实施方式中，所述第一指示信息中包括所述第二小区的标识。
在一种可能的实施方式中，在终端设备从中继设备接收第一指示信息之前，所述方法还包括：
所述终端设备从所述中继设备接收第二指示信息，所述第二指示信息指示所述中继设备开始执行从所述第一小区切换至多个预设小区中的一个小区的操作，所述第二小区为所述多个预设小区中的一个。
第三方面，本申请实施例提供一种通信方法，包括：
中继设备从第一小区获取多个预设小区的切换条件，针对所述多个预设小区中的任意小区i，所述小区i的切换条件为所述中继设备从所述第一小区切换至所述小区i的切换条件；
在所述中继设备满足所述多个预设小区的切换条件中的任意一个时，所述中继设备向终端设备发送第二指示信息，所述第二指示信息指示所述中继设备开始执行从所述第一小区切换至多个预设小区中的一个小区的操作；
所述中继设备与第二小区建立连接，所述第二小区为所述多个预设小区中的一个，所述中继设备满足所述第二小区的切换条件。
在一种可能的实施方式中，中继设备从第一小区获取多个预设小区的切换条件，包括：
所述中继设备从第一小区获取无线资源控制RRC消息，所述RRC消息中包括所述多个预设小区的切换条件。
在一种可能的实施方式中，所述RRC消息中还包括所述多个预设小区中的每个小区的配置信息；所述中继设备与所述第二小区建立连接，包括：
所述中继设备根据所述RRC消息，获取所述第二小区的配置信息；
所述中继设备根据所述第二小区的配置信息，与所述第二小区建立连接。
在一种可能的实施方式中，所述第二小区的切换条件为：
所述中继设备和所述第二小区之间的信号强度大于或等于预设强度。
在一种可能的实施方式中，在所述中继设备与第二小区建立连接后，所述方法还包括：
所述中继设备向所述终端设备发送第一指示信息，所述第一指示信息指 示所述中继设备与所述第二小区建立连接。
在一种可能的实施方式中，所述第一指示信息中包括所述第二小区的标识。
在一种可能的实施方式中，所述方法还包括：
从所述终端设备接收数据，并向所述第二小区发送所述数据。
第四方面，本申请实施例提供一种通信方法，包括：
终端设备从中继设备接收第二指示信息，所述第二指示信息指示所述中继设备开始执行从所述第一小区切换至多个预设小区中的一个小区的操作；
所述终端设备根据所述第二指示信息，停止通过所述中继设备向第一小区发送数据。
在一种可能的实施方式中，所述方法还包括：
所述终端设备从所述中继设备接收第一指示信息，所述第一指示信息指示所述中继设备从第一小区切换至第二小区并与所述第二小区建立连接，所述第二小区为所述多个预设小区中的一个；
所述终端设备根据所述第一指示信息，通过所述中继设备向所述第二小区发送数据。
在一种可能的实施方式中，所述第一指示信息中包括所述第二小区的标识。
第五方面，本申请实施例提供一种通信装置，包括：
获取模块，用于从第一小区获取多个预设小区的切换条件，针对所述多个预设小区中的任意小区i，所述小区i的切换条件为中继设备从所述第一小区切换至所述小区i的切换条件；
连接模块，用于在所述中继设备满足第二小区的切换条件时，中继设备与所述第二小区建立连接，所述第二小区为所述多个预设小区中的任意一个；
发送模块，用于向终端设备发送第一指示信息，所述第一指示信息指示所述中继设备与所述第二小区建立连接。
在一种可能的实施方式中，所述第一指示信息中包括所述第二小区的标识。
在一种可能的实施方式中，所述获取模块具体用于：
从第一小区获取无线资源控制RRC消息，所述RRC消息中包括所述多 个预设小区的切换条件。
在一种可能的实施方式中，所述RRC消息中还包括所述多个预设小区中的每个小区的配置信息；所述连接模块具体用于：
根据所述RRC消息，获取所述第二小区的配置信息；
根据所述第二小区的配置信息，与所述第二小区建立连接。
在一种可能的实施方式中，所述发送模块还用于，在所述中继设备与所述第二小区建立连接之前：
向所述终端设备发送第二指示信息，所述第二指示信息指示所述中继设备开始执行从所述第一小区切换至所述多个预设小区中的一个小区的操作。
在一种可能的实施方式中，所述第二小区的切换条件为：
所述中继设备和所述第二小区之间的信号强度大于或等于预设强度。
在一种可能的实施方式中，所述获取模块还用于：
从所述终端设备接收数据，并向所述第二小区发送所述数据。
第六方面，本申请实施例提供一种通信装置，包括：
接收模块，用于从中继设备接收第一指示信息，所述第一指示信息指示所述中继设备从第一小区切换至第二小区并与所述第二小区建立连接；
发送模块，用于根据所述第一指示信息，通过所述中继设备向所述第二小区发送数据。
在一种可能的实施方式中，所述第一指示信息中包括所述第二小区的标识。
在一种可能的实施方式中，所述接收模块还用于，在终端设备从中继设备接收第一指示信息之前：
从所述中继设备接收第二指示信息，所述第二指示信息指示所述中继设备开始执行从所述第一小区切换至多个预设小区中的一个小区的操作，所述第二小区为所述多个预设小区中的一个。
第七方面，本申请实施例提供一种通信装置，包括：
获取模块，用于从第一小区获取多个预设小区的切换条件，针对所述多个预设小区中的任意小区i，所述小区i的切换条件为中继设备从所述第一小区切换至所述小区i的切换条件；
发送模块，用于在所述中继设备满足所述多个预设小区的切换条件中的 任意一个时，所述中继设备向终端设备发送第二指示信息，所述第二指示信息指示所述中继设备开始执行从所述第一小区切换至多个预设小区中的一个小区的操作；
连接模块，用于所述中继设备与第二小区建立连接，所述第二小区为所述多个预设小区中的一个，所述中继设备满足所述第二小区的切换条件。
在一种可能的实施方式中，所述获取模块具体用于：
从第一小区获取无线资源控制RRC消息，所述RRC消息中包括所述多个预设小区的切换条件。
在一种可能的实施方式中，所述RRC消息中还包括所述多个预设小区中的每个小区的配置信息；所述连接模块具体用于：
根据所述RRC消息，获取所述第二小区的配置信息；
根据所述第二小区的配置信息，与所述第二小区建立连接。
在一种可能的实施方式中，所述第二小区的切换条件为：
所述中继设备和所述第二小区之间的信号强度大于或等于预设强度。
在一种可能的实施方式中，所述发送模块还用于，在所述中继设备与第二小区建立连接后：
向所述终端设备发送第一指示信息，所述第一指示信息指示所述中继设备与所述第二小区建立连接。
在一种可能的实施方式中，所述第一指示信息中包括所述第二小区的标识。
在一种可能的实施方式中，所述获取模块还用于：
从所述终端设备接收数据，并向所述第二小区发送所述数据。
第八方面，本申请实施例提供一种通信装置，包括：
接收模块，用于从中继设备接收第二指示信息，所述第二指示信息指示所述中继设备开始执行从所述第一小区切换至多个预设小区中的一个小区的操作；
处理模块，用于根据所述第二指示信息，停止通过所述中继设备向第一小区发送数据。
在一种可能的实施方式中，所述接收模块还用于：
从所述中继设备接收第一指示信息，所述第一指示信息指示所述中继设 备从第一小区切换至第二小区并与所述第二小区建立连接，所述第二小区为所述多个预设小区中的一个；
所述终端设备根据所述第一指示信息，通过所述中继设备向所述第二小区发送数据。
在一种可能的实施方式中，所述第一指示信息中包括所述第二小区的标识。
第九方面，本申请实施例提供一种中继设备，包括：至少一个处理器和存储器；
所述存储器存储计算机执行指令；
所述至少一个处理器执行所述存储器存储的计算机执行指令，使得所述至少一个处理器执行如第一方面任一项所述的通信方法，或者，使得所述至少一个处理器执行如第三方面任一项所述的通信方法。
第十方面，本申请实施例提供一种终端设备，包括：至少一个处理器和存储器；
所述存储器存储计算机执行指令；
所述至少一个处理器执行所述存储器存储的计算机执行指令，使得所述至少一个处理器执行如第二方面任一项所述的通信方法，或者，使得所述至少一个处理器执行如第四方面任一项所述的通信方法。
第十一方面，本申请实施例提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机执行指令，当处理器执行所述计算机执行指令时，实现如第一方面至第四方面任一项所述的通信方法。
本申请实施例提供的通信方法及装置，首先中继设备从第一小区获取多个预设小区的切换条件，针对多个预设小区中的任意小区i，小区i的切换条件为中继设备从第一小区切换至小区i的切换条件；在中继设备满足第二小区的切换条件时，中继设备与第二小区建立连接，第二小区为多个预设小区中的任意一个；最后，中继设备向终端设备发送第一指示信息，指示中继设备与第二小区建立连接。本申请实施例的方案，在中继设备和第二小区建立连接后，由中继设备通过第一指示信息告知终端设备已经与第二小区建立连接，使得终端设备能够获知中继设备切换完成的时机以及选择切换的目标小区，从而使得终端设备能够通过该中继设备与切换后的第二小区进行交互。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的上下行链路和边链路的示意图；
图2为本申请实施例提供的中继的链路连接示意图；
图3为本申请实施例提供的组切换示意图；
图4为现有技术提供的中继设备组切换的示意图；
图5为本申请实施例提供的一种通信方法的流程示意图；
图6为本申请实施例提供的通信方法的信令图；
图7为本申请又一实施例提供的通信方法的流程示意图；
图8为本申请又一实施例提供的通信方法的流程示意图；
图9为本申请又一实施例提供的通信方法的流程示意图；
图10为本申请实施例提供的通信装置的结构示意图；
图11为本申请实施例提供的通信装置的结构示意图；
图12为本申请实施例提供的通信装置的结构示意图；
图13为本申请实施例提供的通信装置的结构示意图；
图14为本申请实施例提供的中继设备的硬件结构示意图；
图15为本申请实施例提供的终端设备的硬件结构示意图。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
为了便于理解，首先，对本申请所涉及的概念进行说明。
终端设备：通常具有无线收发功能，终端设备可以部署在陆地上，包括 室内或室外、手持、穿戴或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。所述终端设备可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality，简称VR)终端设备、增强现实(augmented reality，简称AR)终端设备、工业控制(industrial control)中的无线终端、车载终端设备、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端设备、智能电网(smart grid)中的无线终端设备、运输安全(transportation safety)中的无线终端设备、智慧城市(smart city)中的无线终端设备、智慧家庭(smart home)中的无线终端设备、可穿戴终端设备等。本申请实施例所涉及的终端设备还可以称为终端、用户设备(user equipment，UE)、接入终端设备、车载终端、工业控制终端、UE单元、UE站、移动站、移动台、远方站、远程终端设备、移动设备、UE终端设备、无线通信设备、UE代理或UE装置等。终端设备也可以是固定的或者移动的。
RRC：radio resource control，无线资源控制。
CHO：conditional handover，条件切换，即切换命令会提前发送给需要进行小区切换的设备，其中包括多个可能的小区的配置信息和各自切换的条件。设备不立刻进行切换操作，而是等待条件满足才执行切换操作的方式。
中继设备：又称中继(relay)，是两个交换中心之间的一条传输通路。本申请中，为了提高传输覆盖的范围，可以在发送端和接收端之间引入中继设备，中继设备可以将接收到的数据转发给接收端，从而扩大发送端的发送范围。
例如，在蜂窝系统中，可以在基站和终端设备之间引入中继设备，中继设备负责将终端设备的数据转发给基站，或者将基站的数据转发给终端设备。
边链路(Sidelink，SL)通信技术，又称物物直连通信技术，是一种和普通无线蜂窝网络通信不太一样的通信技术，在传统的蜂窝网络中，终端设备和网络设备进行通信，此时终端设备和网络设备之间的链路被称为上行(Uplink)或下行链路(Downlink)，接口被称为Uu接口。而在物物直连通信中，终端设备和终端设备直接进行通信，终端设备和终端设备之间的链路称为直连链路，接口被称为PC5接口，边链路又可称为直连链路。
图1为本申请实施例提供的上下行链路和边链路的示意图，如图1所示，包括基站10、终端11和终端12，其中，基站10和终端11之间存在上行链路和下行链路。基站10可以通过下行链路向终端11发送下行数据，终端11可以通过上行链路向基站10发送上行数据。
终端11和终端12之间，存在直连链路，通过该直连链路，终端11可以向终端12发送数据，终端12也可以向终端11发送数据。
边链路的引入最初是为了实现离得比较近的终端设备可以直接通信，数据不需要经过基站转发，减少传输时延。后来，在边链路引入的基础上，设计了边链路中继(sidelink relay)。之前的中继在中继和终端设备之间使用的是上行链路和下行链路进行通信的技术，而边链路中继则是中继设备和终端设备之间的链路采用边链路技术。
图2为本申请实施例提供的中继的链路连接示意图，如图2所示，包括基站20、中继设备21和终端设备22。
中继设备21和基站20之间采用的是上行链路和下行链路进行通信的技术，基站20可以通过下行链路向中继设备21发送下行数据，中继设备21可以通过上行链路向基站20发送上行数据。
在图2的左边，中继设备21和终端设备22之间采用的也是上行链路和下行链路进行通信的技术，中继设备21可以通过下行链路将基站20发送的下行数据发送给终端设备22，终端设备22可以通过上行链路向中继设备22发送上行数据，并由中继设备22转发给基站20。
在图2的右边，中继设备21和终端设备22之间采用的是直链路进行通信的技术，直接进行数据传输。
在无线通信系统里面，当基站直接和终端设备连接时，由于终端设备是可以移动的，有可能从一个基站的覆盖范围移动到另一个基站的覆盖范围，这时终端设备就需要执行切换。同样的，对于中继设备来说，中继设备也是可以移动的。当中继设备和终端设备之间保持连接不变，但中继设备和基站或小区之间发生了移动，会产生组切换(group handover)这种现象，也就是中继设备和终端设备都从一个基站切换到另一个基站，或者，中继设备和终端设备都从一个小区切换到另一个小区，中继设备和终端设备之间保持连接关系不变。
图3为本申请实施例提供的组切换示意图，如图3所示，包括终端设备31、中继设备32、基站33和基站34。终端设备31和中继设备32之间保持连接不变，当终端设备31和中继设备32发生移动时，从基站33切换到基站34，即发生了组切换。
在只包括基站和终端设备的通信系统中，当需要进行切换时，源基站向终端设备发送切换命令。当终端设备接收到切换命令后，就会立刻开始执行切换操作。但是由于当终端设备需要执行切换时，一般发生在终端设备和源基站之间的信号已经不好的情况下，因此可能会发生源基站发送的切换命令，终端设备无法成功接收的情况，此时无法执行切换。如果在终端设备和源基站之间的信号比较好的时候就提前向终端设备发送切换命令，有可能会导致终端设备过早进行切换。
因此，在5G研究时，3GPP引入了条件切换的方案。源基站会提前将切换命令发送给终端设备，切换命令中包括多个可能的目标基站的配置信息，和每个目标基站的各自切换的条件。终端设备接收到切换命令后，并不立刻执行切换操作，而是判断自身是否满足切换条件。只有在满足某个目标基站对应的切换条件后，才执行切换。
例如，切换命令中包括了小区1-5这5个小区，当终端设备收到切换命令后，持续监测这5个小区的信号强度，当小区3的信号强度大于预设阈值(此时小区3的切换条件即为小区3的信号强度大于预设阈值)，且本小区信号强度低于预设阈值，就执行切换到小区3的操作。
在中继设备的组切换中，当中继设备和终端设备一起从一个小区切换到另一个小区，一样可以采用条件切换的方式，中继设备收到多个目标小区的配置信息和各自的切换条件，当中继设备满足切换条件时，才选择一个目标小区完成切换。
图4为现有技术提供的中继设备组切换的示意图，如图4所示，包括：
S41，中继设备向第一小区发送测量结果。
S42，第一小区向第二小区发送切换请求。
S43，第二小区向第一小区发送切换命令。
第二小区在允许中继设备切换到第二小区后，会向第一小区发送切换命令。
S44，第一小区向中继设备发送切换命令。
S45，中继设备向终端设备发送切换命令。
S46，终端设备向中继设备发送切换命令响应。
S47，中继设备与第二小区建立连接。
例如，可以通过随机接入来与第二小区建立连接。
在目前的组切换过程中，由于切换条件一般是中继设备和潜在目标小区之间的信号强度满足某一阈值，所以最终切换的触发和目标小区的选择都是中继设备决定的，对于终端设备来说，并不知道什么时候触发小区切换，也并不知道选择的是哪一个目标小区进行的切换。因此，本申请实施例提供一种方案，使得终端设备能够获知小区切换的触发以及选择的目标小区。下面将进行介绍。
图5为本申请实施例提供的一种通信方法的流程示意图，如图5所示，包括：
S51，中继设备从第一小区获取多个预设小区的切换条件，针对所述多个预设小区中的任意小区i，所述小区i的切换条件为所述中继设备从所述第一小区切换至所述小区i的切换条件。
本申请实施例中，中继设备初始和第一小区连接，通过该中继设备，终端设备和第一小区之间可以进行数据传输。中继设备和终端设备之间保持在一定的距离范围内，使得中继设备和终端设备之间可以保持连接，无需进行切换。
当终端设备和中继设备移动后，可能需要进行小区切换。例如，当终端设备和中继设备移出了第一小区的覆盖范围后，此时终端设备和中继设备需要切换到其他的小区，即第二小区。此时，终端设备和中继设备之间保持的连接关系不变，中继设备和终端设备均需要从第一小区切换到第二小区，即进行组切换。
在中继设备需要进行小区切换之前，第一小区就会向中继设备发送多个预设小区的切换条件，当中继设备满足多个预设小区中的任意小区i的切换条件后，中继设备会从第一小区切换至该小区i。
S52，在所述中继设备满足第二小区的切换条件时，所述中继设备与所述第二小区建立连接，所述第二小区为所述多个预设小区中的任意一个。
第二小区为多个预设小区中的一个，且中继设备满足第二小区的切换条件，则中继设备会从第一小区切换至第二小区。当中继设备开始进行小区切换后，中继设备会与第一小区断开连接，并尝试与第二小区建立连接。
S53，所述中继设备向终端设备发送第一指示信息，所述第一指示信息指示所述中继设备与所述第二小区建立连接。
在中继设备与第二小区建立连接成功后，中继设备会向终端设备发送第一指示信息，指示中继设备与第二小区成功建立连接。终端设备接收到第一指示信息后，就能够根据第一指示信息获知中继设备已经切换到第二小区。此时，终端设备可以停止通过中继设备与第一小区进行通信，并可以通过该中继设备开始与第二小区进行通信。
本申请实施例提供的通信方法，首先中继设备从第一小区获取多个预设小区的切换条件，针对多个预设小区中的任意小区i，小区i的切换条件为中继设备从第一小区切换至小区i的切换条件；在中继设备满足第二小区的切换条件时，中继设备与第二小区建立连接，第二小区为多个预设小区中的任意一个；最后，中继设备向终端设备发送第一指示信息，指示中继设备与第二小区建立连接。本申请实施例的方案，在中继设备和第二小区建立连接后，由中继设备通过第一指示信息告知终端设备已经与第二小区建立连接，使得终端设备能够获知中继设备切换完成的时机以及选择切换的目标小区，从而使得终端设备能够通过该中继设备与切换后的第二小区进行交互。
下面将结合附图对本申请的方案进行详细说明。
当中继设备和终端设备由于位置变化等原因，需要进行小区切换时，中继设备需要从第一小区接收切换命令。其中，当中继设备需要从第一小区切换到第二小区时，第一小区向第二小区发送切换请求。若第二小区允许中继设备切换，则第二小区会向第一小区发送切换命令，且第一小区会将该切换命令发送给中继设备。
可选的，该第一指示信息中包括第二小区的标识。终端设备接收到第一指示信息后，根据第一指示信息中包括的第二小区的标识，能够获知中继设备是从第一小区切换到第二小区。
可选的，中继设备可以从第一小区获取RRC消息，该RRC消息中包括多个预设小区的切换条件。
可选的，该RRC消息中还包括多个预设小区中的每个小区的配置信息。通过RRC消息，中继设备能够获取第二小区的配置信息，并根据第二小区的配置信息，与第二小区建立连接。
可选的，第二小区的切换条件为中继设备和第二小区之间的信号强度大于或等于预设强度。针对多个预设小区中的任意小区i，小区i的切换条件为中继设备和小区i之间的信号强度大于或等于某一信号强度，不同的小区对应的该信号强度的大小可以相同，也可以不同。
可选的，在中继设备与第二小区建立连接之前，中继设备还可以向终端设备发送第二指示信息，指示中继设备开始执行从第一小区切换至多个预设小区中的一个小区的操作。
当中继设备从第一小区获取多个预设小区的切换条件后，终端设备此时并不知道中继设备何时准备进行小区切换，也不知道选择的小区是哪个。第一指示信息是在中继设备和第二小区建立连接成功之后由中继设备向终端设备发送的，在此之前，通过第二指示信息告知中继设备将要开始进行小区切换的操作，即第二指示信息指示中继设备开始执行从第一小区切换至多个预设小区中的一个小区的操作。终端设备根据第二指示信息，停止通过中继设备和第一小区再进行通信，停止通过中继设备向第一小区发送针对第一小区的数据。
第二指示信息中仅仅是告知中继设备将要进行小区切换的操作，但是不会包括中继设备将要切换的目标小区的标识，这是由于，当中继设备满足某个小区i的切换条件后，尝试与小区i进行连接，但是有可能连接失败。此时，中继设备会在其他的小区中选择满足条件的小区，重新尝试建立连接。直到中继设备与第二小区建立连接成功之后，中继设备才会通过第一指示信息告知终端设备切换的目标小区为第二小区。
在终端设备接收到第一指示信息后，即可根据第一指示信息，通过中继设备向第二小区发送数据。
下面将结合附图对本申请的方案进行详细说明。
图6为本申请实施例提供的通信方法的信令图，如图6所示，包括：
S601，中继设备向第一小区上报测量结果。
中继设备可以获取附近的一个或多个小区的测量结果，并向第一小区上 报。
S602，第一小区接收测量结果。
中继设备向第一小区上报测量结果后，第一小区接收测量结果，并根据接收的测量结果确定多个预设小区，以及每个预设小区的配置信息，各种的切换条件。
S603，中继设备向终端设备发送RRC消息(即切换命令)。
该RRC消息中包括多个预设小区的切换条件、以及多个预设小区的配置信息。
终端设备接收到该RRC消息后，能够获知多个预设小区的切换条件、以及多个预设小区的配置信息。
S604，终端设备向中继设备发送切换命令响应。
S605，中继设备确定满足第二小区的切换条件。
S606，中继设备向终端设备发送第二指示信息。
S607，终端设备接收第二指示信息。
第二指示信息指示中继设备开始执行从第一小区切换至多个预设小区中的一个小区的操作，此时终端设备还不知道中继设备选择的目标小区是哪一个，但是能够获知中继设备已经断开与第一小区的连接，开始尝试接入别的小区了。因此，终端设备在接收到第二指示信息后，可以停止向中继设备发送针对第一小区的数据，停止通过中继设备与第一小区进行通信。
S608，中继设备与第二小区建立连接。
S609，中继设备向终端设备发送第一指示信息。
S610，终端设备接收第一指示信息。
第一指示信息中包括第二小区的标识，根据第一指示信息，终端设备能够获知中继设备已经完成了小区切换，并且切换到了第二小区。
图7为本申请又一实施例提供的通信方法的流程示意图，如图7所示，包括：
S71，终端设备从中继设备接收第一指示信息，所述第一指示信息指示所述中继设备从第一小区切换至第二小区并与所述第二小区建立连接；
S72，所述终端设备根据所述第一指示信息，通过所述中继设备向所述第二小区发送数据
在一种可能的实施方式中，所述第一指示信息中包括所述第二小区的标识。
在一种可能的实施方式中，在终端设备从中继设备接收第一指示信息之前，所述方法还包括：
所述终端设备从所述中继设备接收第二指示信息，所述第二指示信息指示所述中继设备开始执行从所述第一小区切换至多个预设小区中的一个小区的操作，所述第二小区为所述多个预设小区中的一个。
图7示例的实施例的方案，是图5-图6示例的方案对应的终端设备侧的方法，其步骤和原理在上述实施例中已经介绍，具体实现可参见上述实施例，此处不再赘述。
图8为本申请又一实施例提供的通信方法的流程示意图，如图8所示，包括：
S81，中继设备从第一小区获取多个预设小区的切换条件，针对所述多个预设小区中的任意小区i，所述小区i的切换条件为所述中继设备从所述第一小区切换至所述小区i的切换条件。
本申请实施例中，中继设备初始和第一小区连接，通过该中继设备，终端设备和第一小区之间可以进行数据传输。中继设备和终端设备之间保持在一定的距离范围内，使得中继设备和终端设备之间可以保持连接，无需进行切换。
当终端设备和中继设备移动后，可能需要进行小区切换。例如，当终端设备和中继设备移出了第一小区的覆盖范围后，此时终端设备和中继设备需要切换到其他的小区，即第二小区。此时，终端设备和中继设备之间保持的连接关系不变，中继设备和终端设备均需要从第一小区切换到第二小区，即进行组切换。
S82，在所述中继设备满足所述多个预设小区的切换条件中的任意一个时，所述中继设备向终端设备发送第二指示信息，所述第二指示信息指示所述中继设备开始执行从所述第一小区切换至多个预设小区中的一个小区的操作。
在中继设备进行小区切换之前，中继设备先向终端设备发送第二指示信息，指示终端设备，中继设备即将进行小区切换，与第一小区断开连接。终端设备接收到第二指示信息后，可以停止通过中继设备与第一小区进行通信， 停止通过中继设备向第一小区发送数据。
S83，所述中继设备与第二小区建立连接，所述第二小区为所述多个预设小区中的一个，所述中继设备满足所述第二小区的切换条件。
第二小区为多个预设小区中的一个，且中继设备满足第二小区的切换条件，则中继设备会从第一小区切换至第二小区。当中继设备开始进行小区切换后，中继设备会与第一小区断开连接，并尝试与第二小区建立连接。
可选的，中继设备从第一小区获取多个预设小区的切换条件的方式可以为：
所述中继设备从第一小区获取无线资源控制RRC消息，所述RRC消息中包括所述多个预设小区的切换条件。
可选的，所述RRC消息中还包括所述多个预设小区中的每个小区的配置信息；所述中继设备与所述第二小区建立连接的方式可以为：
所述中继设备根据所述RRC消息，获取所述第二小区的配置信息；
所述中继设备根据所述第二小区的配置信息，与所述第二小区建立连接。
可选的，所述第二小区的切换条件为：
所述中继设备和所述第二小区之间的信号强度大于或等于预设强度。
可选的，在所述中继设备与第二小区建立连接后，中继设备可以向所述终端设备发送第一指示信息，所述第一指示信息指示所述中继设备与所述第二小区建立连接。终端设备在接收到第一指示信息后，就能够获知中继设备从第一小区切换到了第二小区，终端设备根据RRC小区中第二小区的配置信息，能够通过中继设备与第二小区进行通信。
可选的，所述第一指示信息中包括所述第二小区的标识，终端设备根据第二小区的标识，获知中继设备选择的目标小区是第二小区。
可选的，在终端设备接收到第一指示信息后，中继设备可以从终端设备接收数据，并向第二小区发送所述数据。
图9为本申请又一实施例提供的通信方法的流程示意图，如图9所示，包括：
S91，终端设备从中继设备接收第二指示信息，所述第二指示信息指示所述中继设备开始执行从所述第一小区切换至多个预设小区中的一个小区的操作；
S92，所述终端设备根据所述第二指示信息，停止通过所述中继设备向第一小区发送数据。
在一种可能的实施方式中，所述方法还包括：
所述终端设备从所述中继设备接收第一指示信息，所述第一指示信息指示所述中继设备从第一小区切换至第二小区并与所述第二小区建立连接，所述第二小区为所述多个预设小区中的一个；
所述终端设备根据所述第一指示信息，通过所述中继设备向所述第二小区发送数据。
在一种可能的实施方式中，所述第一指示信息中包括所述第二小区的标识。
图9示例的实施例的方案，是图8示例的方案对应的终端设备侧的方法，其步骤和原理在上述实施例中已经介绍，具体实现可参见上述实施例，此处不再赘述。
本申请实施例提供的通信方法及装置，首先中继设备从第一小区获取多个预设小区的切换条件，针对多个预设小区中的任意小区i，小区i的切换条件为中继设备从第一小区切换至小区i的切换条件；在中继设备满足第二小区的切换条件时，中继设备与第二小区建立连接，第二小区为多个预设小区中的任意一个；最后，中继设备向终端设备发送第一指示信息，指示中继设备与第二小区建立连接。本申请实施例的方案，在中继设备和第二小区建立连接后，由中继设备通过第一指示信息告知终端设备已经与第二小区建立连接，使得终端设备能够获知中继设备切换完成的时机以及选择切换的目标小区，从而使得终端设备能够通过该中继设备与切换后的第二小区进行交互。进一步的，在中继设备开始进行小区切换之前，中继设备可以向终端设备发送第二指示信息，指示中继设备即将要开始进行小区切换，终端设备可以在收到第二指示信息后，停止通过中继设备与第一小区进行通信，节省信令资源。
图10为本申请实施例提供的通信装置的结构示意图，如图10所示，该通信装置100包括获取模块101、连接模块102和发送模块103，其中：
获取模块101用于从第一小区获取多个预设小区的切换条件，针对所述多个预设小区中的任意小区i，所述小区i的切换条件为中继设备从所述第一 小区切换至所述小区i的切换条件；
连接模块102用于在所述中继设备满足第二小区的切换条件时，中继设备与所述第二小区建立连接，所述第二小区为所述多个预设小区中的任意一个；
发送模块103用于向终端设备发送第一指示信息，所述第一指示信息指示所述中继设备与所述第二小区建立连接。
在一种可能的实施方式中，所述第一指示信息中包括所述第二小区的标识。
在一种可能的实施方式中，所述获取模块101具体用于：
从第一小区获取无线资源控制RRC消息，所述RRC消息中包括所述多个预设小区的切换条件。
在一种可能的实施方式中，所述RRC消息中还包括所述多个预设小区中的每个小区的配置信息；所述连接模块102具体用于：
根据所述RRC消息，获取所述第二小区的配置信息；
根据所述第二小区的配置信息，与所述第二小区建立连接。
在一种可能的实施方式中，所述发送模块103还用于，在所述中继设备与所述第二小区建立连接之前：
向所述终端设备发送第二指示信息，所述第二指示信息指示所述中继设备开始执行从所述第一小区切换至所述多个预设小区中的一个小区的操作。
在一种可能的实施方式中，所述第二小区的切换条件为：
所述中继设备和所述第二小区之间的信号强度大于或等于预设强度。
在一种可能的实施方式中，所述获取模块101还用于：
从所述终端设备接收数据，并向所述第二小区发送所述数据。
本申请实施例提供的装置，可用于执行上述方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
本申请实施例所示的通信装置可以为芯片、硬件模组、处理器等。当然，通信装置可以为其它形态，本申请实施例对此不作具体限定。
图11为本申请实施例提供的通信装置的结构示意图，如图11所示，该通信装置110包括接收模块111和发送模块112，其中：
接收模块111用于从中继设备接收第一指示信息，所述第一指示信息指 示所述中继设备从第一小区切换至第二小区并与所述第二小区建立连接；
发送模块112用于根据所述第一指示信息，通过所述中继设备向所述第二小区发送数据。
在一种可能的实施方式中，所述第一指示信息中包括所述第二小区的标识。
在一种可能的实施方式中，所述接收模块111还用于，在终端设备从中继设备接收第一指示信息之前：
从所述中继设备接收第二指示信息，所述第二指示信息指示所述中继设备开始执行从所述第一小区切换至多个预设小区中的一个小区的操作，所述第二小区为所述多个预设小区中的一个。
本申请实施例提供的装置，可用于执行上述方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
本申请实施例所示的通信装置可以为芯片、硬件模组、处理器等。当然，通信装置可以为其它形态，本申请实施例对此不作具体限定。
图12为本申请实施例提供的通信装置的结构示意图，如图12所示，该通信装置120包括获取模块121、发送模块122和连接模块123，其中：
获取模块121用于从第一小区获取多个预设小区的切换条件，针对所述多个预设小区中的任意小区i，所述小区i的切换条件为中继设备从所述第一小区切换至所述小区i的切换条件；
发送模块122用于在所述中继设备满足所述多个预设小区的切换条件中的任意一个时，所述中继设备向终端设备发送第二指示信息，所述第二指示信息指示所述中继设备开始执行从所述第一小区切换至多个预设小区中的一个小区的操作；
连接模块123用于所述中继设备与第二小区建立连接，所述第二小区为所述多个预设小区中的一个，所述中继设备满足所述第二小区的切换条件。
在一种可能的实施方式中，所述获取模块121具体用于：
从第一小区获取无线资源控制RRC消息，所述RRC消息中包括所述多个预设小区的切换条件。
在一种可能的实施方式中，所述RRC消息中还包括所述多个预设小区中的每个小区的配置信息；所述连接模块123具体用于：
根据所述RRC消息，获取所述第二小区的配置信息；
根据所述第二小区的配置信息，与所述第二小区建立连接。
在一种可能的实施方式中，所述第二小区的切换条件为：
所述中继设备和所述第二小区之间的信号强度大于或等于预设强度。
在一种可能的实施方式中，所述发送模块122还用于，在所述中继设备与第二小区建立连接后：
向所述终端设备发送第一指示信息，所述第一指示信息指示所述中继设备与所述第二小区建立连接。
在一种可能的实施方式中，所述第一指示信息中包括所述第二小区的标识。
在一种可能的实施方式中，所述获取模块121还用于：
从所述终端设备接收数据，并向所述第二小区发送所述数据。
本申请实施例提供的装置，可用于执行上述方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
本申请实施例所示的通信装置可以为芯片、硬件模组、处理器等。当然，通信装置可以为其它形态，本申请实施例对此不作具体限定。
图13为本申请实施例提供的通信装置的结构示意图，如图13所示，该通信装置130包括接收模块131和处理模块132，其中：
接收模块131用于从中继设备接收第二指示信息，所述第二指示信息指示所述中继设备开始执行从所述第一小区切换至多个预设小区中的一个小区的操作；
处理模块132用于根据所述第二指示信息，停止通过所述中继设备向第一小区发送数据。
在一种可能的实施方式中，所述接收模块131还用于：
从所述中继设备接收第一指示信息，所述第一指示信息指示所述中继设备从第一小区切换至第二小区并与所述第二小区建立连接，所述第二小区为所述多个预设小区中的一个；
所述终端设备根据所述第一指示信息，通过所述中继设备向所述第二小区发送数据。
在一种可能的实施方式中，所述第一指示信息中包括所述第二小区的标 识。
本申请实施例提供的装置，可用于执行上述方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
本申请实施例所示的通信装置可以为芯片、硬件模组、处理器等。当然，通信装置可以为其它形态，本申请实施例对此不作具体限定。
图14为本申请实施例提供的中继设备的硬件结构示意图，如图14所示，该中继设备包括：至少一个处理器141和存储器142。其中，处理器141和存储器142通过总线143连接。
可选地，该模型确定还包括通信部件。例如，通信部件可以包括接收器和/或发送器。
在具体实现过程中，至少一个处理器141执行所述存储器142存储的计算机执行指令，使得至少一个处理器141执行如上的通信方法。
处理器141的具体实现过程可参见上述方法实施例，其实现原理和技术效果类似，本实施例此处不再赘述。
图15为本申请实施例提供的终端设备的硬件结构示意图，如图15所示，该终端设备包括：至少一个处理器151和存储器152。其中，处理器151和存储器152通过总线153连接。
可选地，该模型确定还包括通信部件。例如，通信部件可以包括接收器和/或发送器。
在具体实现过程中，至少一个处理器151执行所述存储器152存储的计算机执行指令，使得至少一个处理器151执行如上的通信方法。
处理器151的具体实现过程可参见上述方法实施例，其实现原理和技术效果类似，本实施例此处不再赘述。
在上述图14或图15所示的实施例中，应理解，处理器可以是中央处理单元(英文：Central Processing Unit，简称：CPU)，还可以是其他通用处理器、数字信号处理器(英文：Digital Signal Processor，简称：DSP)、专用集成电路(英文：Application Specific Integrated Circuit，简称：ASIC)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。结合申请所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
存储器可能包含高速RAM存储器，也可能还包括非易失性存储NVM，例如至少一个磁盘存储器。
总线可以是工业标准体系结构(Industry Standard Architecture，ISA)总线、外部设备互连(Peripheral Component，PCI)总线或扩展工业标准体系结构(Extended Industry Standard Architecture，EISA)总线等。总线可以分为地址总线、数据总线、控制总线等。为便于表示，本申请附图中的总线并不限定仅有一根总线或一种类型的总线。
本申请还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机执行指令，当处理器执行所述计算机执行指令时，实现如上所述的通信方法。
上述的计算机可读存储介质，上述可读存储介质可以是由任何类型的易失性或非易失性存储设备或者它们的组合实现，如静态随机存取存储器(SRAM)，电可擦除可编程只读存储器(EEPROM)，可擦除可编程只读存储器(EPROM)，可编程只读存储器(PROM)，只读存储器(ROM)，磁存储器，快闪存储器，磁盘或光盘。可读存储介质可以是通用或专用计算机能够存取的任何可用介质。
一种示例性的可读存储介质耦合至处理器，从而使处理器能够从该可读存储介质读取信息，且可向该可读存储介质写入信息。当然，可读存储介质也可以是处理器的组成部分。处理器和可读存储介质可以位于专用集成电路(Application Specific Integrated Circuits，简称：ASIC)中。当然，处理器和可读存储介质也可以作为分立组件存在于设备中。
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(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
本领域普通技术人员可以理解：实现上述各方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成。前述的程序可以存储于一计算机可读取存储介质中。该程序在执行时，执行包括上述各方法实施例的步骤；而前述的存储介质包括：ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (15)

  1. 一种通信方法，其特征在于，包括：
    中继设备从第一小区获取多个预设小区的切换条件，针对所述多个预设小区中的任意小区i，所述小区i的切换条件为所述中继设备从所述第一小区切换至所述小区i的切换条件；
    在所述中继设备满足第二小区的切换条件时，所述中继设备与所述第二小区建立连接，所述第二小区为所述多个预设小区中的任意一个；
    所述中继设备向终端设备发送第一指示信息，所述第一指示信息指示所述中继设备与所述第二小区建立连接。
  2. 根据权利要求1所述的方法，其特征在于，所述第一指示信息中包括所述第二小区的标识。
  3. 根据权利要求1或2所述的方法，其特征在于，中继设备从第一小区获取多个预设小区的切换条件，包括：
    所述中继设备从第一小区获取无线资源控制RRC消息，所述RRC消息中包括所述多个预设小区的切换条件。
  4. 根据权利要求3所述的方法，其特征在于，所述RRC消息中还包括所述多个预设小区中的每个小区的配置信息；所述中继设备与所述第二小区建立连接，包括：
    所述中继设备根据所述RRC消息，获取所述第二小区的配置信息；
    所述中继设备根据所述第二小区的配置信息，与所述第二小区建立连接。
  5. 根据权利要求1-4任一项所述的方法，其特征在于，在所述中继设备与所述第二小区建立连接之前，所述方法还包括：
    所述中继设备向所述终端设备发送第二指示信息，所述第二指示信息指示所述中继设备开始执行从所述第一小区切换至所述多个预设小区中的一个小区的操作。
  6. 根据权利要求1-5任一项所述的方法，其特征在于，所述第二小区的切换条件为：
    所述中继设备和所述第二小区之间的信号强度大于或等于预设强度。
  7. 根据权利要求1-6任一项所述的方法，其特征在于，所述方法还包括：
    所述中继设备从所述终端设备接收数据，并向所述第二小区发送所述数 据。
  8. 一种通信方法，其特征在于，包括：
    终端设备从中继设备接收第一指示信息，所述第一指示信息指示所述中继设备从第一小区切换至第二小区并与所述第二小区建立连接；
    所述终端设备根据所述第一指示信息，通过所述中继设备向所述第二小区发送数据。
  9. 根据权利要求8所述的方法，其特征在于，所述第一指示信息中包括所述第二小区的标识。
  10. 根据权利要求8或9所述的方法，其特征在于，在终端设备从中继设备接收第一指示信息之前，所述方法还包括：
    所述终端设备从所述中继设备接收第二指示信息，所述第二指示信息指示所述中继设备开始执行从所述第一小区切换至多个预设小区中的一个小区的操作，所述第二小区为所述多个预设小区中的一个。
  11. 一种通信装置，其特征在于，包括：
    获取模块，用于从第一小区获取多个预设小区的切换条件，针对所述多个预设小区中的任意小区i，所述小区i的切换条件为中继设备从所述第一小区切换至所述小区i的切换条件；
    连接模块，用于在所述中继设备满足第二小区的切换条件时，中继设备与所述第二小区建立连接，所述第二小区为所述多个预设小区中的任意一个；
    发送模块，用于向终端设备发送第一指示信息，所述第一指示信息指示所述中继设备与所述第二小区建立连接。
  12. 一种通信装置，其特征在于，包括：
    接收模块，用于从中继设备接收第一指示信息，所述第一指示信息指示所述中继设备从第一小区切换至第二小区并与所述第二小区建立连接；
    发送模块，用于根据所述第一指示信息，通过所述中继设备向所述第二小区发送数据。
  13. 一种中继设备，其特征在于，包括：至少一个处理器和存储器；
    所述存储器存储计算机执行指令；
    所述至少一个处理器执行所述存储器存储的计算机执行指令，使得所述至少一个处理器执行如权利要求1至7任一项所述的通信方法。
  14. 一种终端设备，其特征在于，包括：至少一个处理器和存储器；
    所述存储器存储计算机执行指令；
    所述至少一个处理器执行所述存储器存储的计算机执行指令，使得所述至少一个处理器执行如权利要求8至10任一项所述的通信方法。
  15. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机执行指令，当处理器执行所述计算机执行指令时，实现如权利要求1至10任一项所述的通信方法。
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