WO2023016258A1 - 终端接入方法、装置、终端及存储介质 - Google Patents

终端接入方法、装置、终端及存储介质 Download PDF

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Publication number
WO2023016258A1
WO2023016258A1 PCT/CN2022/108198 CN2022108198W WO2023016258A1 WO 2023016258 A1 WO2023016258 A1 WO 2023016258A1 CN 2022108198 W CN2022108198 W CN 2022108198W WO 2023016258 A1 WO2023016258 A1 WO 2023016258A1
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Prior art keywords
terminal
relay
target
request message
establishment request
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PCT/CN2022/108198
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English (en)
French (fr)
Inventor
赵亚利
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大唐移动通信设备有限公司
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Priority to KR1020247004475A priority Critical patent/KR20240029783A/ko
Publication of WO2023016258A1 publication Critical patent/WO2023016258A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/08—Access security
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/248—Connectivity information update
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • 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
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • 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 disclosure relates to the field of communication technologies, and in particular, to a terminal access method, device, terminal and storage medium.
  • the relay terminal is a terminal within the coverage of the network, and the remote terminal may be located within the coverage of the network or outside the coverage of the network.
  • the remote terminal can access the network device through the relay terminal; for UE-to-UE relay, the remote terminal can access the target terminal through the relay terminal.
  • the present application provides a terminal access method, device, terminal and storage medium, which are used to realize the establishment of a relay connection in a multi-hop scenario.
  • the present disclosure provides a terminal access method, which is applied to a target relay terminal, including: receiving a connection establishment request message sent by the terminal through a direct communication interface, the connection establishment request message carrying the identity information of the terminal, and the identity information of the terminal.
  • the identification information is used to indicate that the terminal accesses the target relay terminal as a remote terminal, or accesses the target relay terminal as a relay terminal.
  • the terminal access method further includes: performing a target operation corresponding to the terminal's identity information according to the terminal's identity information.
  • connection establishment request message is a PC5 connection establishment request message
  • PC5 connection establishment request message includes PC5-S signaling and/or PC5-RRC signaling.
  • connection establishment request message carries indication information, and the value of the indication information indicates that the terminal accesses the target relay terminal as a remote terminal, or, as a relay terminal, Access the target relay terminal.
  • the indication information may be optionally carried in the connection establishment request message, and whether the indication information is carried indicates that the terminal accesses the relay terminal as a remote terminal, or accesses the target relay terminal as a relay terminal .
  • performing the target operation corresponding to the identity information of the terminal includes: if it is determined that the terminal accesses the target relay terminal as a remote terminal, then directly The communication interface establishes a direct communication connection with the terminal;
  • a direct communication interface connection with the terminal is established, and an indication message is sent to at least one of the target network device, the target remote terminal, and the last-hop relay terminal A device, and/or, establishes a direct communication interface connection with the terminal, and updates its own routing table;
  • the instruction information is used to instruct the target network device, the target remote terminal or the last-hop relay terminal to update the corresponding routing table.
  • the connection establishment request message also carries the relay capability indication information of the terminal, and/or, the terminal accesses the target relay terminal The relay working mode used after the terminal.
  • the relay capability indication information includes at least one of the following:
  • the terminal access method further includes: according to the relay capability indication information of the terminal carried in the connection establishment request message, determining the relay working mode used by the terminal after accessing the target relay terminal.
  • the terminal access method further includes: sending a response message corresponding to the connection establishment request message to the terminal, where the response message carries indication information, and the indication information is used to instruct the terminal to access the target relay terminal to use relay working mode.
  • the relay working mode includes at least one of the following:
  • an embodiment of the present disclosure provides a terminal access method, which is applied to a terminal, including: sending a connection establishment request message to a target relay terminal through a direct communication interface, the connection establishment request message carrying the identity information of the terminal, and the terminal's The identity information is used to indicate that the terminal accesses the target relay terminal as a remote terminal, or accesses the target relay terminal as a relay terminal.
  • the terminal access method before sending the connection establishment request message to the target relay terminal through the direct communication interface, the terminal access method further includes: determining the target relay terminal according to the identity of the terminal.
  • determining the target relay terminal according to the identity of the terminal includes: if the terminal accesses the target relay terminal as a remote terminal, the relay terminal that satisfies the first preset condition Select a relay terminal as the target relay terminal; or, if the terminal accesses the target relay terminal as a relay terminal, select N relay terminals among the relay terminals satisfying the second preset condition as Target relay terminal, N is an integer greater than or equal to 1.
  • the second preset condition includes at least one of the following: the relay working mode supported by the terminal includes the relay working mode currently used by the target relay terminal; the direct communication between the terminal and the relay terminal The channel quality of the interface is higher than the preset threshold.
  • connection establishment request message carries indication information, and the value of the indication information indicates that the terminal accesses the target relay terminal as a remote terminal, or, as a relay terminal, Access to the target relay terminal;
  • connection establishment request message may optionally carry indication information, and whether to carry the indication information indicates that the terminal is to access the target relay terminal as a remote terminal, or to access the target relay terminal as a relay terminal terminal.
  • the connection establishment request message when the terminal accesses the target relay terminal as a relay terminal, the connection establishment request message also carries the relay capability indication information of the terminal, and/or, the terminal accesses the target relay terminal The relay working mode used after relaying the terminal.
  • the terminal access method further includes: receiving a relay discovery message broadcast by the target relay terminal, where the relay discovery message carries the relay working mode of the target relay terminal; The relay working mode of the terminal determines the relay working mode used after the terminal accesses the target relay terminal.
  • the terminal access method further includes: receiving a response message corresponding to the connection establishment request message sent by the target relay terminal, where the response message carries indication information, and the indication information is used to instruct the terminal to access the The relay working mode used after the terminal.
  • the relay working mode includes at least one of the following: layer 2 relay L2 relay; layer 3 relay L3 relay; layer 2 terminal-to-network device relay L2 U2N relay; layer 2 terminal-to-terminal Relay L2 U2U relay; layer 3 terminal-to-network equipment relay L3 U2N relay; layer 3 terminal-to-terminal relay L3 U2U relay.
  • the relay capability indication information includes at least one of the following: layer 2 relay L2 relay; layer 3 relay L3 relay; layer 2 terminal to network device relay L2 U2N relay; layer 2 terminal to Terminal relay L2 U2U relay; layer 3 terminal-to-network equipment relay L3 U2N relay; layer 3 terminal-to-terminal relay L3 U2U relay.
  • an embodiment of the present disclosure provides a terminal access device, which is applied to a target relay terminal, including: a receiving module, configured to receive a connection establishment request message sent by the terminal through a direct communication interface, and the connection establishment request message carries the terminal's Identity information, the identity information of the terminal is used to indicate that the terminal accesses the target relay terminal as a remote terminal, or accesses the target relay terminal as a relay terminal.
  • an embodiment of the present disclosure provides a terminal access device, which is applied to a terminal, including: a sending module, configured to send a connection establishment request message to a target relay terminal through a direct communication interface, and the connection establishment request message carries the identity of the terminal Identification information, the identity information of the terminal is used to indicate that the terminal accesses the target relay terminal as a remote terminal, or accesses the target relay terminal as a relay terminal.
  • an embodiment of the present disclosure provides a relay terminal, including:
  • transceiver configured to send and receive data under the control of the processor
  • a processor that reads a computer program in memory and does the following:
  • the connection establishment request message carries the identity information of the terminal, and the identity information of the terminal is used to indicate that the terminal accesses the target relay terminal as a remote terminal, or, with The identity of the relay terminal accesses the target relay terminal.
  • the processor is further configured to perform the following operation: perform a target operation corresponding to the terminal's identity information according to the terminal's identity information.
  • connection establishment request message is a PC5 connection establishment request message
  • PC5 connection establishment request message includes PC5-S signaling and/or PC5-RRC signaling.
  • connection establishment request message carries indication information, and the value of the indication information indicates that the terminal accesses the target relay terminal as a remote terminal, or, as a relay terminal, Access to the target relay terminal;
  • the indication information may be optionally carried in the connection establishment request message, and whether the indication information is carried indicates that the terminal accesses the relay terminal as a remote terminal, or accesses the target relay terminal as a relay terminal .
  • performing the target operation corresponding to the identity information of the terminal includes: if it is determined that the terminal accesses the target relay terminal as a remote terminal, then directly The communication interface establishes a direct communication connection with the terminal;
  • a direct communication interface connection with the terminal is established, and an indication message is sent to at least one of the target network device, the target remote terminal, and the last-hop relay terminal A device, and/or, establishes a direct communication interface connection with the terminal, and updates its own routing table;
  • the instruction information is used to instruct the target network device, the target remote terminal or the last-hop relay terminal to update the corresponding routing table.
  • the connection establishment request message also carries the relay capability indication information of the terminal, and/or, the terminal accesses the target relay terminal The relay working mode used after the terminal.
  • the relay capability indication information includes at least one of the following: layer 2 relay L2 relay; layer 3 relay L3 relay; layer 2 terminal to network device relay L2 U2N relay; layer 2 terminal to Terminal relay L2 U2U relay; layer 3 terminal-to-network equipment relay L3 U2N relay; layer 3 terminal-to-terminal relay L3 U2U relay.
  • the processor is further configured to perform the following operation: according to the relay capability indication information of the terminal carried in the connection establishment request message, determine the relay working mode used by the terminal after accessing the target relay terminal.
  • the processor is further configured to perform the following operations: send a response message corresponding to the connection establishment request message to the terminal, where the response message carries indication information, and the indication information is used to indicate that the terminal accesses the target relay terminal.
  • the relay working mode to use.
  • the relay working mode includes at least one of the following: layer 2 relay L2 relay; layer 3 relay L3 relay; layer 2 terminal-to-network device relay L2 U2N relay; layer 2 terminal-to-terminal Relay L2 U2U relay; layer 3 terminal-to-network equipment relay L3 U2N relay; layer 3 terminal-to-terminal relay L3 U2U relay.
  • an embodiment of the present disclosure provides a terminal, including:
  • transceiver configured to send and receive data under the control of the processor
  • a processor that reads a computer program in memory and does the following:
  • connection establishment request message carries the identity information of the terminal, and the identity information of the terminal is used to indicate that the terminal accesses the target relay terminal as a remote terminal, or , to access the target relay terminal as a relay terminal.
  • the processor is further configured to perform the following operation: determine a target relay terminal according to the identity of the terminal.
  • determining the target relay terminal according to the identity of the terminal includes: if the terminal accesses the target relay terminal as a remote terminal, the relay terminal that satisfies the first preset condition Select a relay terminal as the target relay terminal; or, if the terminal accesses the target relay terminal as a relay terminal, select N relay terminals among the relay terminals satisfying the second preset condition as Target relay terminal, N is an integer greater than or equal to 1.
  • the second preset condition includes at least one of the following: the relay working mode supported by the terminal includes the relay working mode currently used by the target relay terminal; the direct communication between the terminal and the relay terminal The channel quality of the interface is higher than the preset threshold.
  • connection establishment request message carries indication information, and the value of the indication information indicates that the terminal accesses the target relay terminal as a remote terminal, or, as a relay terminal, Access the target relay terminal.
  • connection establishment request message may optionally carry indication information, and whether to carry the indication information indicates that the terminal is to access the target relay terminal as a remote terminal, or to access the target relay terminal as a relay terminal terminal.
  • the connection establishment request message when the terminal accesses the target relay terminal as a relay terminal, the connection establishment request message also carries the relay capability indication information of the terminal, and/or, the terminal accesses the target relay terminal The relay working mode used after relaying the terminal.
  • the processor is further configured to perform the following operations: receive a relay discovery message broadcast by the target relay terminal, where the relay discovery message carries the relay working mode of the target relay terminal;
  • the relay working mode of the relay terminal determines the relay working mode used after the terminal accesses the target relay terminal.
  • the processor is further configured to perform the following operations: receive a response message corresponding to the connection establishment request message sent by the target relay terminal, where the response message carries indication information, and the indication information is used to instruct the terminal to access the target The relay working mode used after relaying the terminal.
  • the relay working mode includes at least one of the following: layer 2 relay L2 relay; layer 3 relay L3 relay; layer 2 terminal-to-network device relay L2 U2N relay; layer 2 terminal-to-terminal Relay L2 U2U relay; layer 3 terminal-to-network equipment relay L3 U2N relay; layer 3 terminal-to-terminal relay L3 U2U relay.
  • the relay capability indication information includes at least one of the following: layer 2 relay L2 relay; layer 3 relay L3 relay; layer 2 terminal to network device relay L2 U2N relay; layer 2 terminal to Terminal relay L2 U2U relay; layer 3 terminal-to-network equipment relay L3 U2N relay; layer 3 terminal-to-terminal relay L3 U2U relay.
  • an embodiment of the present disclosure provides a processor-readable storage medium, where a computer program is stored in the processor-readable storage medium, and the computer program is used to enable a processor to execute the terminal interface as described in the first aspect and/or the second aspect. input method.
  • a computer program product includes: a computer program, and when the computer program is executed by a processor, the terminal access method according to the first aspect and/or the second aspect is implemented.
  • a terminal access method, device, terminal, and storage medium provided in the present disclosure receive a connection establishment request message sent by the terminal through a direct communication interface, the connection establishment request message carries the identity information of the terminal, and the identity information of the terminal is used to indicate The terminal accesses the target relay terminal as a remote terminal, or accesses the target relay terminal as a relay terminal.
  • FIG. 1 is a schematic diagram of an application scenario of a terminal access method in the prior art
  • FIG. 2 is a schematic diagram of an application scenario of a terminal access method provided by an embodiment of the present disclosure
  • FIG. 3 is a first schematic diagram of signaling interaction of a terminal access method provided by an embodiment of the present disclosure
  • FIG. 4 is a second schematic diagram of signaling interaction of a terminal access method provided by an embodiment of the present disclosure
  • FIG. 5 is a third schematic diagram of signaling interaction of a terminal access method provided by an embodiment of the present disclosure.
  • FIG. 6 is a first structural schematic diagram of a terminal access device provided by an embodiment of the present disclosure.
  • FIG. 7 is a second structural schematic diagram of a terminal access device provided by an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a relay terminal provided by an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a terminal provided by an embodiment of the present disclosure.
  • the relay terminal is a terminal within the coverage of the network, and the remote terminal may be located within the coverage of the network or outside the coverage of the network.
  • the remote terminal can access the network device through the relay terminal; for UE-to-UE relay, the remote terminal can access the target terminal through the relay terminal.
  • FIG. 1 is a schematic diagram of an application scenario of a terminal access method in the prior art. As shown in FIG. 1 , the scenario includes: a remote terminal 101 , a relay terminal 102 and a target device 103 .
  • the target device 103 may be a network device, such as a base station, or other terminal devices, such as other remote terminals.
  • the base station is shown in FIG. 1 as an example, but it is not limited thereto.
  • the relay terminal 102 is within the communication range of the target device 103, and the remote terminal 101 is outside the communication range of the target device 103.
  • the remote terminal 101 can forward the relevant information through the relay terminal 102. data, thereby realizing data transmission with the target device 103.
  • the behavior of the target relay terminal is different, and an enhanced mechanism needs to be considered to ensure that the target relay terminal
  • the relay terminal can identify the identity of the terminal to be accessed, so as to perform different operations according to the identity of the terminal to be accessed.
  • the embodiments of the present disclosure provide a terminal access method, device, terminal and storage medium.
  • the terminal accesses the target relay terminal, it carries the terminal information in the connection establishment request message.
  • the identity information of the terminal is used to ensure that the target relay terminal can correctly identify the identity information of the terminal to be accessed, so that the operation corresponding to the identity of the terminal is adopted to ensure the normal operation of the system.
  • FIG. 2 is a schematic diagram of an application scenario of a terminal access method provided by an embodiment of the present disclosure. As shown in Figure 2, this scenario includes: remote terminal 201, relay terminal 202 (in the figure, relay terminal 1, relay terminal 2 ... relay terminal M is shown as an example, M is greater than 1) and the target device 203.
  • this scenario includes: remote terminal 201, relay terminal 202 (in the figure, relay terminal 1, relay terminal 2 ... relay terminal M is shown as an example, M is greater than 1) and the target device 203.
  • the target device 203 may be a network device, such as a base station, or other terminal devices, such as other remote terminals.
  • a base station is used as an example, but it is not limited thereto.
  • remote terminal 201 and relay terminal 202 may be devices that provide voice and/or data connectivity to users, handheld devices with wireless connection functions, or other processing devices connected to wireless modems.
  • the names of the above-mentioned terminals may be different.
  • the above-mentioned terminals may be called user equipment (User Equipment, UE), and the above-mentioned terminals may also be wireless terminals.
  • the access network (Radio Access Network, RAN) communicates with one or more core networks (Core Network, CN), and the wireless terminal can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a mobile phone with a mobile terminal Computers, for example, may be portable, pocket, handheld, built-in, or vehicle-mounted mobile devices that exchange voice and/or data with the radio access network.
  • a wireless terminal may also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, A remote terminal (remote terminal), an access terminal (access terminal), a user terminal (user terminal), a user agent (user agent), and a user device (user device) are not limited in the embodiments of the present disclosure.
  • the applicable system may be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) general packet Wireless business (general packet radio service, GPRS) system, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, Long term evolution advanced (LTE-A) system, universal mobile telecommunications system (UMTS), worldwide interoperability for microwave access (WiMAX) system, 5G new air interface (New Radio, NR) system, etc.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet Wireless business
  • long term evolution long term evolution
  • LTE long term evolution
  • LTE frequency division duplex frequency division duplex
  • FDD frequency division duplex
  • TDD time division duplex
  • LTE-A Long term evolution advanced
  • FIG. 2 is schematic, and the above-mentioned scenario may also include other network devices, such as a wireless repeater device and a wireless backhaul device, etc., which are not shown in FIG. 2 .
  • FIG. 3 is a first schematic flowchart of a terminal access method provided by an embodiment of the present disclosure. As shown in Figure 3, the terminal access method may include the following steps:
  • the terminal sends a connection establishment request message to a target relay terminal through a direct communication interface.
  • connection establishment request message is used to request to establish a direct communication connection with the target relay terminal
  • the connection establishment request message carries the identity information of the terminal
  • the identity information of the terminal is used to indicate that the terminal accesses the target relay terminal as a remote terminal.
  • the relay terminal or, accessing the target relay terminal as a relay terminal.
  • the specific understanding of the identity of the relay terminal means that the terminal expects to work as a relay terminal after accessing the target relay terminal.
  • the target relay terminal is relay terminal 1
  • the identity information is used to indicate that the remote terminal 201 accesses the terminal as a remote terminal.
  • the relay terminal 1 still accesses the relay terminal 1 as a relay terminal.
  • accessing the relay terminal 1 as a relay terminal means that the remote terminal 201 will enable the relay function after accessing the relay terminal 1, and work as a relay terminal.
  • the target relay terminal receives the connection establishment request message sent by the terminal through the direct communication interface.
  • the target relay terminal obtains the identity information in the connection establishment request message, and performs corresponding operations according to the identity information. As for the specific execution manner, it will be shown in subsequent embodiments.
  • the terminal sends a connection establishment request message to a target relay terminal through a direct communication interface, and the target relay terminal receives the connection establishment request message sent by the terminal through the direct communication interface. Since the connection establishment request message carries the identity information of the terminal, the relay terminal can perform corresponding operations according to the identity information of the terminal to be accessed, thereby ensuring that when a terminal wants to access the target relay terminal, the target relay terminal can Correctly identify the identity information of the terminal to be accessed, so as to adopt the operation corresponding to the terminal identity to ensure the normal operation of the system.
  • connection establishment request message may be a PC5 connection establishment request message, where the PC5 connection establishment request message may be PC5-S signaling and/or PC5-RRC signaling.
  • the identity information of the terminal may be carried in the connection establishment request message in an explicit or implicit manner.
  • the identity information of the terminal is explicitly carried in the connection establishment request message, including:
  • the indication information is carried in the connection establishment request message, and the value of the indication information indicates that the terminal accesses the target relay terminal as a remote terminal, or accesses the target relay terminal as a relay terminal.
  • the value of the indication information carried in the connection establishment request message (for example, 1 bit) is 0, it means that the terminal accesses the target relay terminal as a remote terminal; if the value of the bit indication information is 1, then Indicates that the terminal accesses the target relay terminal as a relay terminal.
  • the identity information of the terminal is implicitly carried in the connection establishment request message, including:
  • Indication information may optionally be carried in the connection establishment request message, and whether the indication information is carried indicates that the terminal accesses the relay terminal as a remote terminal, or accesses a target relay terminal as a relay terminal.
  • the indication information (for example, 1 bit) is selectively carried in the connection establishment request message, and if the 1 bit indication information is carried in the connection establishment request message, it means that the terminal accesses the target relay terminal as a relay terminal; if If the 1-bit indication information is not carried in the connection establishment request message, it means that the terminal accesses the target relay terminal as a remote terminal.
  • FIG. 4 is a second schematic diagram of signaling interaction of a terminal access method provided by an embodiment of the present disclosure.
  • the terminal access method provided by the embodiment of the present disclosure may include the following steps:
  • the terminal determines a target relay terminal according to the identity of the terminal.
  • the terminal with the identity of the remote terminal and the terminal with the identity of the relay terminal use different methods when determining the target relay terminal.
  • the terminal accesses the target relay terminal as a remote terminal, select a relay terminal among the relay terminals satisfying the first preset condition as the target relay terminal.
  • the embodiment of the present disclosure does not limit the first preset condition.
  • the first preset condition may be determined based on the AS layer standard and/or the NAS rule.
  • the first preset condition may be that the channel quality of the direct communication interface is greater than a preset threshold. That is, the terminal determines the channel quality (for example, SD-RSRP) of the direct communication interface between the terminal and each candidate relay terminal measured by it, and then the terminal uniquely selects the channel quality condition (that is, greater than the preset threshold) from the direct communication interface.
  • a preset threshold for example, SD-RSRP
  • One relay terminal serves as the target relay terminal.
  • the terminal selects a relay terminal from the candidate relay terminals that meet the first preset condition as the target relay terminal.
  • the content of the NAS relay selection rule this embodiment of the present disclosure does not specifically limit it.
  • the second preset condition includes at least one of the following:
  • the relay working mode supported by the terminal includes the relay working mode currently used by the target relay terminal;
  • the channel quality of the direct communication interface between the terminal and the relay terminal is higher than a preset threshold.
  • the terminal sends a connection establishment request message to the target relay terminal through the direct communication interface.
  • step S402 is similar to those of step S301 in the embodiment shown in FIG.
  • the target relay terminal performs a target operation corresponding to the terminal's identity information according to the terminal's identity information.
  • the target relay terminal If it is determined that the terminal accesses the target relay terminal as a remote terminal, the target relay terminal establishes a direct communication interface connection with the terminal.
  • the relay terminal If it is determined that the terminal accesses the target relay terminal as a relay terminal, in addition to establishing a direct communication interface connection with the terminal, the relay terminal also needs to send an indication message to the target network device, the target remote terminal, and the upper One-hop relaying at least one device in the terminal; and/or, establishing a direct communication interface connection with the terminal, and updating its own routing table.
  • the instruction information is used to instruct the target network device, the target remote terminal or the last-hop relay terminal to update the corresponding routing table.
  • the target relay terminal is the relay terminal 1 as an example, and the target network device and the target remote terminal are the target device 203 in FIG. 2 .
  • the terminal sends a connection establishment request message to the relay terminal 1, wherein the identity indication information of the carrying terminal indicates that the terminal is a relay terminal, and after the relay terminal 1 determines that the identity of the terminal is a relay terminal according to the identity indication information, the intermediate The relay terminal 1 will send the indication information to the target device 203, and as an optional implementation manner, will also send the indication information to other relay terminals, such as the relay terminal 2, the relay terminal M, and so on. Therefore, the routing information may be updated by the target device 203 and/or the relay terminal 2, the relay terminal M, and the like.
  • the connection establishment request message when the terminal accesses the target relay terminal as a relay terminal, the connection establishment request message also carries the relay capability indication information of the terminal, and/or, the terminal uses relay working mode.
  • the relay working mode and the relay capability indication information include at least one of the following:
  • the target relay terminal can perform different operations according to the identity of the access terminal, so as to ensure that when a terminal wants to access the target relay terminal, the target relay terminal can correctly identify the identity of the terminal to be accessed Information, so that the operation corresponding to the terminal identity is adopted to ensure the normal operation of the system.
  • FIG. 5 is a third schematic diagram of signaling interaction of a terminal access method provided by an embodiment of the present disclosure. As shown in Figure 5, the terminal access method provided by the embodiment of the present disclosure includes the following steps:
  • the terminal determines a target relay terminal according to the identity of the terminal.
  • step S501 is similar to step S401 in the embodiment shown in FIG. 4 , and will not be repeated here.
  • the terminal receives the relay discovery message broadcast by the target relay terminal.
  • the relay discovery message carries the relay working mode of the target relay terminal.
  • the terminal determines, according to the relay working mode of the target relay terminal, the relay working mode used after the terminal accesses the target relay terminal.
  • the terminal sends a connection establishment request message to the target relay terminal through the direct communication interface.
  • connection establishment request message also carries the relay capability indication information of the terminal, and/or the relay working mode used by the terminal after accessing the target relay terminal.
  • the target relay terminal performs a target operation corresponding to the terminal's identity information according to the terminal's identity information.
  • steps S505 - S505 are similar to steps S402 - S403 in the embodiment shown in FIG. 4 , and will not be repeated here.
  • the target relay terminal determines the relay working mode used by the terminal after accessing the target relay terminal according to the relay capability indication information of the terminal carried in the connection establishment request message.
  • the target relay terminal sends a response message corresponding to the connection establishment request message to the terminal.
  • the response message carries indication information
  • the indication information is used to indicate the relay working mode used by the terminal after accessing the target relay terminal.
  • the terminal receives the response message corresponding to the connection establishment request message sent by the target relay terminal, and obtains the relay working mode indicated in the response message after the terminal accesses the target relay terminal, so that when accessing the target relay terminal After that, work according to the relay working mode.
  • FIG. 6 is a schematic structural diagram of a terminal access device provided by an embodiment of the present disclosure. As shown in Figure 6, the terminal access device 600 includes:
  • the receiving module 601 is configured to receive a connection establishment request message sent by the terminal through the direct communication interface, the connection establishment request message carries the identity information of the terminal, and the identity information of the terminal is used to indicate that the terminal accesses the target as a remote terminal relay terminal, or access the target relay terminal as a relay terminal.
  • the terminal access apparatus 600 further includes: a processing module 602, configured to execute a target operation corresponding to the terminal's identity information according to the terminal's identity information.
  • connection establishment request message is a PC5 connection establishment request message
  • PC5 connection establishment request message includes PC5-S signaling and/or PC5-RRC signaling.
  • connection establishment request message carries indication information, and the value of the indication information indicates that the terminal accesses the target relay terminal as a remote terminal, or, as a relay terminal, Access to the target relay terminal;
  • the indication information may be optionally carried in the connection establishment request message, and whether the indication information is carried indicates that the terminal accesses the relay terminal as a remote terminal, or accesses the target relay terminal as a relay terminal .
  • the processing module 602 is specifically configured to: if it is determined that the terminal accesses the target relay terminal as a remote terminal, establish a direct communication interface connection between the target relay terminal and the terminal;
  • the terminal If it is determined that the terminal is accessing the target relay terminal as a relay terminal, establish a direct communication interface connection between the target relay terminal and the terminal, and send an indication message to the target network device, the target remote terminal and the previous hop relay At least one device in the terminal, and/or, establishes a direct communication interface connection between the target relay terminal and the terminal, and updates its own routing table;
  • the instruction information is used to instruct the target network device, the target remote terminal or the last-hop relay terminal to update the corresponding routing table.
  • the connection establishment request message also carries the relay capability indication information of the terminal, and/or, the terminal accesses the target relay terminal The relay working mode used after the terminal.
  • the relay capability indication information includes at least one of the following: layer 2 relay L2 relay; layer 3 relay L3 relay; layer 2 terminal to network device relay L2 U2N relay; layer 2 terminal to Terminal relay L2 U2U relay; layer 3 terminal-to-network equipment relay L3 U2N relay; layer 3 terminal-to-terminal relay L3 U2U relay.
  • the terminal access apparatus 600 further includes: a determining module 603, configured to determine the terminal to access the target relay terminal and use the relay working mode.
  • the terminal access device 600 further includes: a sending module 604, configured to send a response message corresponding to the connection establishment request message to the terminal, where the response message carries indication information, and the indication information is used to instruct the terminal to access The relay working mode used after entering the target relay terminal.
  • a sending module 604 configured to send a response message corresponding to the connection establishment request message to the terminal, where the response message carries indication information, and the indication information is used to instruct the terminal to access The relay working mode used after entering the target relay terminal.
  • the relay working mode includes at least one of the following: layer 2 relay L2 relay; layer 3 relay L3 relay; layer 2 terminal-to-network device relay L2 U2N relay; layer 2 terminal-to-terminal Relay L2 U2U relay; layer 3 terminal-to-network equipment relay L3 U2N relay; layer 3 terminal-to-terminal relay L3 U2U relay.
  • the above-mentioned terminal access device provided in the present disclosure can correspondingly implement all the method steps implemented by the target relay terminal in the above-mentioned method embodiments, and can achieve the same technical effect, and no further description will be made here. Parts and beneficial effects in the embodiment that are the same as those in the method embodiment are specifically described in detail.
  • FIG. 7 is a second structural schematic diagram of a terminal access device provided by an embodiment of the present disclosure. As shown in Figure 7, the terminal access device 700 includes:
  • the sending module 701 is configured to send a connection establishment request message to the target relay terminal through the direct communication interface, the connection establishment request message carries the identity information of the terminal, and the identity information of the terminal is used to indicate that the terminal is accessed as a remote terminal The target relay terminal, or access the target relay terminal as a relay terminal.
  • the terminal access apparatus 700 further includes: a determining module 702, configured to determine a target relay terminal according to an identity of the terminal.
  • the determining module 702 is specifically configured to, if the terminal accesses the target relay terminal as a remote terminal, select a relay terminal among the relay terminals satisfying the first preset condition as the target relay terminal; or, if the terminal accesses the target relay terminal as a relay terminal, select N relay terminals as target relay terminals among the relay terminals satisfying the second preset condition, and N is an integer greater than or equal to 1.
  • the second preset condition includes at least one of the following: the relay working mode supported by the terminal includes the relay working mode currently used by the target relay terminal; the direct communication between the terminal and the relay terminal The channel quality of the interface is higher than the preset threshold.
  • the identity information of the terminal is carried in the connection establishment request message in an explicit or implicit manner.
  • connection establishment request message carries indication information, and the value of the indication information indicates that the terminal accesses the target relay terminal as a remote terminal, or, as a relay terminal, Access to the target relay terminal;
  • connection establishment request message may optionally carry indication information, and whether to carry the indication information indicates that the terminal is to access the target relay terminal as a remote terminal, or to access the target relay terminal as a relay terminal terminal.
  • the connection establishment request message when the terminal accesses the target relay terminal as a relay terminal, the connection establishment request message also carries the relay capability indication information of the terminal, and/or, the terminal accesses the target relay terminal The relay working mode used after relaying the terminal.
  • the terminal access device 700 further includes: a receiving module 703, configured to receive a relay discovery message broadcast by the target relay terminal, the relay discovery message carrying the relay information of the target relay terminal Working mode; the determining module 702 is further configured to determine the relaying working mode used by the terminal after accessing the target relaying terminal according to the relaying working mode of the target relaying terminal.
  • the receiving module 703 is also configured to receive a response message corresponding to the connection establishment request message sent by the target relay terminal, the response message carries indication information, and the indication information is used to instruct the terminal to access the target relay The relay working mode used after the terminal.
  • the relay working mode includes at least one of the following: layer 2 relay L2 relay; layer 3 relay L3 relay; layer 2 terminal-to-network device relay L2 U2N relay; layer 2 terminal-to-terminal Relay L2 U2U relay; layer 3 terminal-to-network equipment relay L3 U2N relay; layer 3 terminal-to-terminal relay L3 U2U relay.
  • the relay capability indication information includes at least one of the following: layer 2 relay L2 relay; layer 3 relay L3 relay; layer 2 terminal to network device relay L2 U2N relay; layer 2 terminal to Terminal relay L2 U2U relay; layer 3 terminal-to-network equipment relay L3 U2N relay; layer 3 terminal-to-terminal relay L3 U2U relay.
  • the above-mentioned terminal access device provided by the present disclosure can correspondingly implement all the method steps implemented by the terminal in the above-mentioned method embodiments, and can achieve the same technical effect, and no further description is given here in this embodiment.
  • the same parts and beneficial effects as those of the method embodiment will be described in detail.
  • FIG. 8 is a schematic structural diagram of a relay terminal provided by an embodiment of the present disclosure.
  • the relay terminal is a target relay terminal.
  • the target relay terminal includes: a transceiver 801 , a processor 802 and a memory 803 .
  • Transceiver 801 configured to send and receive data under the control of processor 802;
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 802 and various circuits of the memory represented by the memory 803 are linked together.
  • the bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein.
  • the bus interface provides the interface.
  • the transceiver 801 may be a plurality of elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, optical cables, and other transmission media.
  • the processor 802 is responsible for managing the bus architecture and general processing, and the memory 803 can store data used by the processor 802 when performing operations.
  • the processor 802 is responsible for managing the bus architecture and general processing, and the memory 803 can store data used by the processor 802 when performing operations.
  • the processor 802 may be a central processing unit (central processing unit, CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field-Programmable Gate Array, FPGA) or complex programmable logic device (Complex Programmable Logic Device, CPLD), the processor can also adopt a multi-core architecture.
  • CPU central processing unit
  • ASIC Application Specific Integrated Circuit
  • FPGA Field-Programmable Gate Array
  • CPLD Complex Programmable Logic Device
  • the processor 802 is configured to execute any terminal access method related to the target relay terminal provided in the embodiments of the present disclosure according to the obtained executable instructions by calling the computer program stored in the memory 803 .
  • the processor 802 and the memory 803 may also be arranged physically separately.
  • the processor 802 is configured to read the computer program in the memory 803 and perform the following operations: receive the connection establishment request message sent by the terminal through the direct communication interface, the connection establishment request message carries the identity information of the terminal, and the identity information of the terminal It is used to indicate that the terminal accesses the target relay terminal as a remote terminal, or accesses the target relay terminal as a relay terminal.
  • the processor 802 is further configured to perform the following operation: perform a target operation corresponding to the terminal's identity information according to the terminal's identity information.
  • connection establishment request message is a PC5 connection establishment request message
  • PC5 connection establishment request message includes PC5-S signaling and/or PC5-RRC signaling.
  • connection establishment request message carries indication information, and the value of the indication information indicates that the terminal accesses the target relay terminal as a remote terminal, or, as a relay terminal, Access the target relay terminal.
  • the indication information may be optionally carried in the connection establishment request message, and whether the indication information is carried indicates that the terminal accesses the relay terminal as a remote terminal, or accesses the target relay terminal as a relay terminal .
  • performing the target operation corresponding to the identity information of the terminal includes: if it is determined that the terminal accesses the target relay terminal as a remote terminal, then directly The connection communication interface establishes a direct communication connection with the terminal.
  • performing a target operation corresponding to the terminal's identity information according to the terminal's identity information includes:
  • the terminal If it is determined that the terminal is accessing the target relay terminal as a relay terminal, establish a direct communication interface connection between the target relay terminal and the terminal, and send an indication message to the target network device, the target remote terminal and the previous hop relay At least one device in the terminal, and/or, establishes a direct communication interface connection between the target relay terminal and the terminal, and updates its own routing table;
  • the instruction information is used to instruct the target network device, the target remote terminal or the last-hop relay terminal to update the corresponding routing table.
  • the connection establishment request message also carries the relay capability indication information of the terminal, and/or, the terminal accesses the target relay terminal The relay working mode used after the terminal.
  • the relay capability indication information includes at least one of the following: layer 2 relay L2 relay; layer 3 relay L3 relay; layer 2 terminal to network device relay L2 U2N relay; layer 2 terminal to Terminal relay L2 U2U relay; layer 3 terminal-to-network equipment relay L3 U2N relay; layer 3 terminal-to-terminal relay L3 U2U relay.
  • the processor 802 is also configured to perform the following operations: according to the relay capability indication information of the terminal carried in the connection establishment request message, determine the relay working mode used by the terminal after accessing the target relay terminal .
  • the processor 802 is further configured to perform the following operations: send a response message corresponding to the connection establishment request message to the terminal, where the response message carries indication information, and the indication information is used to instruct the terminal to access the target relay terminal The relay working mode used later.
  • the relay working mode includes at least one of the following: layer 2 relay L2 relay; layer 3 relay L3 relay; layer 2 terminal-to-network device relay L2 U2N relay; layer 2 terminal-to-terminal Relay L2 U2U relay; layer 3 terminal-to-network equipment relay L3 U2N relay; layer 3 terminal-to-terminal relay L3 U2U relay.
  • the above-mentioned relay terminal provided by the present disclosure can implement all the method steps implemented by the target relay terminal in the above-mentioned method embodiment, and can achieve the same technical effect.
  • the same parts and beneficial effects as those of the method embodiment will be described in detail.
  • FIG. 9 is a schematic structural diagram of a terminal provided by an embodiment of the present disclosure. As shown in FIG. 9 , the terminal includes: a transceiver 901 , a processor 902 and a memory 903 .
  • Memory 903 used to store computer programs
  • Transceiver 901 configured to send and receive data under the control of processor 902;
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 902 and various circuits of the memory represented by the memory 903 are linked together.
  • the bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein.
  • the bus interface provides the interface.
  • the transceiver 901 may be a plurality of elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, optical cables, and other transmission media.
  • the processor 902 is responsible for managing the bus architecture and general processing, and the memory 903 can store data used by the processor 902 when performing operations.
  • the processor 902 is responsible for managing the bus architecture and general processing, and the memory 903 can store data used by the processor 902 when performing operations.
  • the processor 902 may be a central processing unit (central processing unit, CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field-Programmable Gate Array, FPGA) or complex programmable logic device (Complex Programmable Logic Device, CPLD), the processor can also adopt a multi-core architecture.
  • CPU central processing unit
  • ASIC Application Specific Integrated Circuit
  • FPGA Field-Programmable Gate Array
  • CPLD Complex Programmable Logic Device
  • the processor 902 is configured to execute any terminal access method related to the target relay terminal provided in the embodiments of the present disclosure according to the obtained executable instructions by calling the computer program stored in the memory 903 .
  • the processor 902 and the memory 903 may also be arranged physically separately.
  • the processor 902 is configured to read the computer program in the memory 903 and perform the following operations:
  • connection establishment request message carries the identity information of the terminal, and the identity information of the terminal is used to indicate that the terminal accesses the target relay terminal as a remote terminal, or , to access the target relay terminal as a relay terminal.
  • the processor 902 is further configured to perform the following operation: determine a target relay terminal according to the identity of the terminal.
  • determining the target relay terminal according to the identity of the terminal includes: if the terminal accesses the target relay terminal as a remote terminal, the relay terminal that satisfies the first preset condition Select a relay terminal as the target relay terminal; or, if the terminal accesses the target relay terminal as a relay terminal, select N relay terminals among the relay terminals satisfying the second preset condition as Target relay terminal, N is an integer greater than or equal to 1.
  • the second preset condition includes at least one of the following: the relay working mode supported by the terminal includes the relay working mode currently used by the target relay terminal; the direct communication between the terminal and the relay terminal The channel quality of the interface is higher than the preset threshold.
  • connection establishment request message carries indication information, and the value of the indication information indicates that the terminal accesses the target relay terminal as a remote terminal, or, as a relay terminal, Access to the target relay terminal;
  • connection establishment request message may optionally carry indication information, and whether to carry the indication information indicates that the terminal is to access the target relay terminal as a remote terminal, or to access the target relay terminal as a relay terminal terminal.
  • the connection establishment request message when the terminal accesses the target relay terminal as a relay terminal, the connection establishment request message also carries the relay capability indication information of the terminal, and/or, the terminal accesses the target relay terminal The relay working mode used after relaying the terminal.
  • the processor 902 is further configured to perform the following operations: receive a relay discovery message broadcast by the target relay terminal, where the relay discovery message carries the relay working mode of the target relay terminal; The relay working mode of the relay terminal determines the relay working mode used after the terminal accesses the target relay terminal.
  • the processor 902 is further configured to perform the following operations: receive a response message corresponding to the connection establishment request message sent by the target relay terminal, where the response message carries indication information, and the indication information is used to instruct the terminal to access The relay working mode used after the target relays the terminal.
  • the relay working mode includes at least one of the following: layer 2 relay L2 relay; layer 3 relay L3 relay; layer 2 terminal-to-network device relay L2 U2N relay; layer 2 terminal-to-terminal Relay L2 U2U relay; layer 3 terminal-to-network equipment relay L3 U2N relay; layer 3 terminal-to-terminal relay L3 U2U relay.
  • the relay capability indication information includes at least one of the following: layer 2 relay L2 relay; layer 3 relay L3 relay; layer 2 terminal to network device relay L2 U2N relay; layer 2 terminal to Terminal relay L2 U2U relay; layer 3 terminal-to-network equipment relay L3 U2N relay; layer 3 terminal-to-terminal relay L3 U2U relay.
  • the above-mentioned terminal provided by the present disclosure can implement all the method steps implemented by the terminal side in the above-mentioned method embodiments, and can achieve the same technical effect.
  • the same parts and beneficial effects are described in detail.
  • each functional unit in each embodiment of the present disclosure 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 above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
  • the above integrated units are realized in the form of software function units and sold or used as independent products, they can be stored in a processor-readable storage medium.
  • the technical solution of the present disclosure is essentially or part of the contribution to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions for enabling a computer device (which may be a personal computer, server, or network device, etc.) or a processor (processor) to execute all or part of the steps of the methods in various embodiments of the present disclosure.
  • 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. .
  • an embodiment of the present disclosure provides a processor-readable storage medium, where a computer program is stored in the processor-readable storage medium, and the computer program is used to enable the processor to implement the target relay terminal in the above method embodiments. All the steps of the method are implemented and can achieve the same technical effect, so the parts and beneficial effects in this embodiment that are the same as those in the method embodiment will not be described in detail here.
  • an embodiment of the present disclosure provides a processor-readable storage medium, where a computer program is stored in the processor-readable storage medium, and the computer program is used to enable the processor to implement all the functions implemented by the terminal side in the foregoing method embodiments.
  • method steps, and can achieve the same technical effect, the same parts and beneficial effects in this embodiment as in the method embodiment will not be described in detail here.
  • the processor-readable storage medium may be any available medium or data storage device that the processor can access, including but not limited to magnetic storage (such as floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (such as CD, DVD, BD, HVD, etc.), and semiconductor memory (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)), etc.
  • magnetic storage such as floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.
  • optical storage such as CD, DVD, BD, HVD, etc.
  • semiconductor memory such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)
  • an embodiment of the present disclosure also provides a computer program product containing instructions, the computer program is stored in a storage medium, at least one processor can read the computer program from the storage medium, and at least one processor executes the
  • the computer program can implement all the method steps implemented by the target relay terminal in the above method embodiment, and can achieve the same technical effect, so the parts and beneficial effects in this embodiment that are the same as those in the method embodiment will not be detailed here. .
  • an embodiment of the present disclosure also provides a computer program product containing instructions, the computer program is stored in a storage medium, at least one processor can read the computer program from the storage medium, and at least one processor executes the computer program All the method steps implemented by the terminal in the above method embodiment can be implemented at the same time, and the same technical effect can be achieved, and the same parts and beneficial effects in this embodiment as in the method embodiment will not be described in detail here.
  • An embodiment of the present disclosure also provides a communication system, including a target relay terminal and a terminal.
  • the third target relay terminal can perform all the method steps performed by the target relay terminal side in the foregoing method embodiments, and can achieve the same technical effect.
  • the terminal can perform all the method steps performed by the terminal side in the foregoing method embodiments, and can achieve the same technical effect. Parts and beneficial effects in this embodiment that are the same as those in the method embodiment will not be described in detail here.
  • the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Accordingly, the present disclosure can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) having computer-usable program code embodied therein.
  • each flow and/or block in the signaling interaction diagram and/or block diagram, and a combination of procedures and/or blocks in the signaling interaction diagram and/or block diagram can be implemented by computer-executable instructions.
  • These computer-executable instructions can be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine, such that instructions executed by the processor of the computer or other programmable data processing equipment produce A device for realizing the functions specified in one or more procedures of the signaling interaction schematic diagram and/or one or more blocks of the block diagram.
  • processor-executable instructions may also be stored in a processor-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, such that the instructions stored in the processor-readable memory produce a manufacturing product, the instruction device implements the functions specified in one or more procedures in the signaling interaction schematic diagram and/or one or more blocks in the block diagram.
  • processor-executable instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented
  • the executed instructions provide steps for realizing the functions specified in one or more procedures of the signaling interaction diagram and/or one or more blocks of the block diagram.

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Abstract

本公开提供一种终端接入方法、装置、终端及存储介质，目标中继终端接收终端通过直接通信接口发送的连接建立请求消息，连接建立请求消息携带终端的身份标识信息，终端的身份标识信息用于指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。通过本方案，可以保证当有终端要接入目标中继终端时，目标中继终端能够正确识别要接入的终端的身份信息，从而采用和终端身份对应的操作，保证系统正常运作。

Description

终端接入方法、装置、终端及存储介质
本公开要求于2021年08月10日提交中国专利局、申请号为202110914994.8、申请名称为“终端接入方法、装置、终端及存储介质”的中国专利申请的优先权，其全部内容通过引用结合在本公开中。
技术领域
本公开涉及通信技术领域，尤其涉及一种终端接入方法、装置、终端及存储介质。
背景技术
5G NR(New Radio，新空口)系统中为了扩展网络的覆盖范围，引入了终端到网络设备的中继UE-to-Network Relay和终端到终端的中继UE-to-UE Relay。其中，中继终端(Relay UE)为处于网络覆盖范围内的终端，远端终端可以位于网络覆盖范围内，也可以位于网络覆盖范围外。对于UE-to-Network relay，远端终端可以通过中继终端接入网络设备；对于UE-to-UE relay，远端终端可以通过中继终端接入目标终端。
目前的技术中，只支持一跳中继，即终端通过一跳中继终端接入网络设备或者目标终端。后续为了支持但是更灵活的网络拓扑，可能会引入多跳中继，多跳场景下如何实现中继连接建立目前尚没有明确方案。
发明内容
本请提供一种终端接入方法、装置、终端及存储介质，用于实现多跳场景下中继连接的建立。
第一方面，本公开提供一种终端接入方法，应用于目标中继终端，包括：接收终端通过直接通信接口发送的连接建立求消息，连接建立请求消息携带终端的身份标识信息，终端的身份标识信息用于指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。
作为一种可选的实施方式，该终端接入方法还包括：根据终端的身份标识信息，执行与终端的身份标识信息对应的目标操作。
作为一种可选的实施方式，连接建立请求消息为PC5连接建立请求消息，PC5连接建立请求消息包括PC5-S信令和/或PC5-RRC信令。
作为一种可选的实施方式，在连接建立请求消息中携带指示信息，通过指示信息的取值来指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。
或者，在连接建立请求消息中可选的携带指示信息，通过是否携带指示信息来指示终端是以远端终端的身份接入中继终端，或者，以中继终端的身份接入目标中继终端。
作为一种可选的实施方式，根据终端的身份标识信息，执行与终端的身份标识信息对应的目标操作，包括：若确定终端是以远端终端的身份接入目标中继终端，则通过直连通信接口与终端建立直连通信连接；
若确定终端是以中继终端的身份接入目标中继终端，则建立与终端的直接通信接口连接，并发送指示消息至目标网络设备、目标远端终端和上一跳中继终端中的至少一个设备，和/或，建立与终端的 直接通信接口连接，并更新自身的路由表；
其中，指示信息用于指示目标网络设备、目标远端终端或者上一跳中继终端更新对应的路由表。
作为一种可选的实施方式，若终端是以中继终端的身份接入目标中继终端，连接建立请求消息中还携带终端的中继能力指示信息，和/或，终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，中继能力指示信息包括如下至少一种：
层2中继L2 relay；
层3中继L3 relay；
层2终端到网络设备中继L2 U2N relay；
层2终端到终端中继L2 U2U relay；
层3终端到网络设备中继L3 U2N relay；
层3终端到终端中继L3 U2U relay。
作为一种可选的实施方式，该终端接入方法还包括：根据连接建立请求消息中携带的终端的中继能力指示信息，确定终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，该终端接入方法还包括：向终端发送连接建立请求消息对应的响应消息，响应消息中携带指示信息，指示信息用于指示终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，中继工作模式包括如下至少一种：
层2中继L2 relay；
层3中继L3 relay；
层2终端到网络设备中继L2 U2N relay；
层2终端到终端中继L2 U2U relay；
层3终端到网络设备中继L3 U2N relay；
层3终端到终端中继L3 U2U relay。
第二方面，本公开实施例提供一种终端接入方法，应用于终端，包括：通过直接通信接口向目标中继终端发送连接建立请求消息，连接建立请求消息携带终端的身份标识信息，终端的身份标识信息用于指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。
作为一种可选的实施方式，在通过直接通信接口向目标中继终端发送连接建立请求消息之前，该终端接入方法还包括：根据终端的身份，确定目标中继终端。
作为一种可选的实施方式，根据终端的身份，确定目标中继终端，包括：若终端是以远端终端的身份接入目标中继终端，则在满足第一预设条件的中继终端中选择一个中继终端作为目标中继终端；或者，若终端是以中继终端的身份接入目标中继终端，则在满足第二预设条件的中继终端中选择N个中继终端为目标中继终端，N为大于等于1的整数。
作为一种可选的实施方式，第二预设条件包括一下至少一项：终端支持的中继工作模式包含目标中继终端当前使用的中继工作模式；终端和中继终端之间的直接通信接口的信道质量高于预设门限。
作为一种可选的实施方式，在连接建立请求消息中携带指示信息，通过指示信息的取值来指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端；
或者，在连接建立请求消息中可选的携带指示信息，通过是否携带指示信息来指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。
作为一种可选的实施方式，当终端是以中继终端的身份接入目标中继终端时，连接建立请求消息中还携带有终端的中继能力指示信息，和/或，终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，该终端接入方法还包括：接收目标中继终端广播的中继发现消息，中继发现消息中携带有目标中继终端的中继工作模式；根据目标中继终端的中继工作模式，确定终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，该终端接入方法还包括：接收目标中继终端发送的连接建立请求消息对应的响应消息，响应消息中携带指示信息，指示信息用于指示终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，中继工作模式包括以下至少一种：层2中继L2 relay；层3中继L3 relay；层2终端到网络设备中继L2 U2N relay；层2终端到终端中继L2 U2U relay；层3终端到网络设备中继L3 U2N relay；层3终端到终端中继L3 U2U relay。
作为一种可选的实施方式，中继能力指示信息包括以下至少一种：层2中继L2 relay；层3中继L3 relay；层2终端到网络设备中继L2 U2N relay；层2终端到终端中继L2 U2U relay；层3终端到网络设备中继L3 U2N relay；层3终端到终端中继L3 U2U relay。
第三方面，本公开实施例提供一种终端接入装置，应用于目标中继终端，包括：接收模块，用于接收终端通过直接通信接口发送的连接建立请求消息，连接建立请求消息携带终端的身份标识信息，终端的身份标识信息用于指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。
第四方面，本公开实施例提供一种终端接入装置，应用于终端，包括：发送模块，用于通过直接通信接口向目标中继终端发送连接建立请求消息，连接建立请求消息携带终端的身份标识信息，终端的身份标识信息用于指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。
第五方面，本公开实施例提供一种中继终端，包括：
存储器，用于存储计算机程序；
收发机，用于在处理器的控制下收发数据；
处理器，用于读取存储器中的计算机程序并执行以下操作：
接收终端通过直接通信接口发送的连接建立请求消息，连接建立请求消息携带终端的身份标识信息，终端的身份标识信息用于指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。
作为一种可选的实施方式，处理器还用于执行如下操作：根据终端的身份标识信息，执行与终端的身份标识信息对应的目标操作。
作为一种可选的实施方式，连接建立请求消息为PC5连接建立请求消息，PC5连接建立请求消息包括PC5-S信令和/或PC5-RRC信令。
作为一种可选的实施方式，在连接建立请求消息中携带指示信息，通过指示信息的取值来指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端；
或者，在连接建立请求消息中可选的携带指示信息，通过是否携带指示信息来指示终端是以远端终端的身份接入中继终端，或者，以中继终端的身份接入目标中继终端。
作为一种可选的实施方式，根据终端的身份标识信息，执行与终端的身份标识信息对应的目标操作，包括：若确定终端是以远端终端的身份接入目标中继终端，则通过直连通信接口与终端建立直连通信连接；
若确定终端是以中继终端的身份接入目标中继终端，则建立与终端的直接通信接口连接，并发送 指示消息至目标网络设备、目标远端终端和上一跳中继终端中的至少一个设备，和/或，建立与终端的直接通信接口连接，并更新自身的路由表；
其中，指示信息用于指示目标网络设备、目标远端终端或者上一跳中继终端更新对应的路由表。
作为一种可选的实施方式，若终端是以中继终端的身份接入目标中继终端，连接建立请求消息中还携带终端的中继能力指示信息，和/或，终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，中继能力指示信息包括如下至少一种：层2中继L2 relay；层3中继L3 relay；层2终端到网络设备中继L2 U2N relay；层2终端到终端中继L2 U2U relay；层3终端到网络设备中继L3 U2N relay；层3终端到终端中继L3 U2U relay。
作为一种可选的实施方式，处理器还用于执行如下操作：根据连接建立请求消息中携带的终端的中继能力指示信息，确定终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，处理器还用于执行如下操作：向终端发送连接建立请求消息对应的响应消息，响应消息中携带指示信息，指示信息用于指示终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，中继工作模式包括如下至少一种：层2中继L2 relay；层3中继L3 relay；层2终端到网络设备中继L2 U2N relay；层2终端到终端中继L2 U2U relay；层3终端到网络设备中继L3 U2N relay；层3终端到终端中继L3 U2U relay。
第六方面，本公开实施例提供一种终端，包括：
存储器，用于存储计算机程序；
收发机，用于在处理器的控制下收发数据；
处理器，用于读取存储器中的计算机程序并执行以下操作：
通过直接通信接口向目标中继终端发送连接建立请求消息，连接建立请求消息携带终端的身份标识信息，终端的身份标识信息用于指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。
作为一种可选的实施方式，处理器还用于执行如下操作：根据终端的身份，确定目标中继终端。
作为一种可选的实施方式，根据终端的身份，确定目标中继终端，包括：若终端是以远端终端的身份接入目标中继终端，则在满足第一预设条件的中继终端中选择一个中继终端作为目标中继终端；或者，若终端是以中继终端的身份接入目标中继终端，则在满足第二预设条件的中继终端中选择N个中继终端为目标中继终端，N为大于等于1的整数。
作为一种可选的实施方式，第二预设条件包括一下至少一项：终端支持的中继工作模式包含目标中继终端当前使用的中继工作模式；终端和中继终端之间的直接通信接口的信道质量高于预设门限。
作为一种可选的实施方式，在连接建立请求消息中携带指示信息，通过指示信息的取值来指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。
或者，在连接建立请求消息中可选的携带指示信息，通过是否携带指示信息来指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。
作为一种可选的实施方式，当终端是以中继终端的身份接入目标中继终端时，连接建立请求消息中还携带有终端的中继能力指示信息，和/或，终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，处理器还用于执行以下操作：接收目标中继终端广播的中继发现消息，中继发现消息中携带有目标中继终端的中继工作模式；根据目标中继终端的中继工作模式，确定终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，处理器还用于执行以下操作：接收目标中继终端发送的连接建立请求 消息对应的响应消息，响应消息中携带指示信息，指示信息用于指示终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，中继工作模式包括以下至少一种：层2中继L2 relay；层3中继L3 relay；层2终端到网络设备中继L2 U2N relay；层2终端到终端中继L2 U2U relay；层3终端到网络设备中继L3 U2N relay；层3终端到终端中继L3 U2U relay。
作为一种可选的实施方式，中继能力指示信息包括以下至少一种：层2中继L2 relay；层3中继L3 relay；层2终端到网络设备中继L2 U2N relay；层2终端到终端中继L2 U2U relay；层3终端到网络设备中继L3 U2N relay；层3终端到终端中继L3 U2U relay。
第七方面，本公开实施例提供一种处理器可读存储介质，处理器可读存储介质存储有计算机程序，计算机程序用于使处理器执行如第一方面和/或第二方面的终端接入方法。
第八方面，计算机程序产品，包括：计算机程序，计算机程序被处理器执行时实现如第一方面和/或第二方面的终端接入方法。
本公开提供的一种终端接入方法、装置、终端及存储介质，接收终端通过直接通信接口发送的连接建立请求消息，连接建立请求消息携带终端的身份标识信息，终端的身份标识信息用于指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。通过本方案，可以保证当有终端要接入目标中继终端时，目标中继终端能够正确识别要接入的终端的身份信息，从而采用和终端身份对应的操作，保证系统正常运作。
应当理解，上述发明内容部分中所描述的内容并非旨在限定本公开的实施例的关键或重要特征，亦非用于限制本公开的范围。本公开的其它特征将通过以下的描述变得容易理解。
附图说明
为了更清楚地说明本公开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公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为现有技术中终端接入方法的应用场景示意图；
图2为本公开实施例提供的终端接入方法的应用场景示意图；
图3为本公开实施例提供的一种终端接入方法的信令交互示意图一；
图4为本公开实施例提供的一种终端接入方法的信令交互示意图二；
图5为本公开实施例提供的一种终端接入方法的信令交互示意图三；
图6为本公开实施例提供的一种终端接入装置的结构示意图一；
图7为本公开实施例提供的一种终端接入装置的结构示意图二；
图8为本公开实施例提供的一种中继终端的结构示意图；
图9为本公开实施例提供的一种终端的结构示意图。
具体实施方式
本公开中术语“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一 种“或”的关系。本公开实施例中术语“多个”是指两个或两个以上，其它量词与之类似。
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，并不是全部的实施例。基于本公开中的实施例，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，都属于本公开保护的范围。
5G NR(New Radio，新空口)系统中为了扩展网络的覆盖范围，引入了终端到网络设备的中继UE-to-Network Relay和终端到终端的中继UE-to-UE Relay。其中，中继终端(Relay UE)为处于网络覆盖范围内的终端，远端终端可以位于网络覆盖范围内，也可以位于网络覆盖范围外。对于UE-to-Network relay，远端终端可以通过中继终端接入网络设备；对于UE-to-UE relay，远端终端可以通过中继终端接入目标终端。
图1为现有技术中终端接入方法的应用场景示意图。如图1所示，该场景包括：远端终端101、中继终端102和目标设备103。
在实际应用中，目标设备103可以为网络设备，例如是基站等；也可以为其他的终端设备，例如是其他的远端终端，图1中以基站为例示出，但不以此为限定。
其中，中继终端102在目标设备103的通信范围内，远端终端101在目标设备103的的通信范围外，远端终端101为了与目标设备103实现通信，可以通过中继终端102来转发相关数据，从而实现与目标设备103的数据传输。
目前的技术中，只支持一跳中继，即远端终端101只能通过一跳中继终端接入网络设备或者目标终端。后续为了支持但是更灵活的网络拓扑，可能会引入多跳中继，但多跳场景下如何实现中继连接建立目前尚没有明确方案。
考虑到对于多跳中继场景下，普通远端终端和期望做为中继工作的终端接入目标中继终端时，目标中继终端的行为是不同的，需要考虑增强机制，以保证目标中继终端能够识别出要接入的终端的身份，从而根据要接入的终端的身份执行不同操作。
因此，为了解决上述问题，本公开实施例提供的一种终端接入方法、装置、终端及存储介质，在本方法中，终端在接入目标中继终端时，在连接建立请求消息中携带终端的身份标识信息，以保证目标中继终端能够正确识别要接入的终端的身份信息，从而采用和终端身份对应的操作，保证系统正常运作。
图2为本公开实施例提供的终端接入方法的应用场景示意图。如图2所示，本场景中包括：远端终端201、中继终端202(图中以中继终端1、中继终端2......中继终端M为例示出，M为大于1的整数)以及目标设备203。
在实际应用中，目标设备203可以为网络设备，例如是基站等，也可以为其他的终端设备，例如是其他的远端终端，图2中以基站为例示出，但不以此为限定。
另外，上述的远端终端201、中继终端202，均可以是指向用户提供语音和/或数据连通性的设备、有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备等。
在不同的系统中，上述终端的名称可能也不相同，例如在5G系统中，上述终端可以称为用户设备(User Equipment，UE)，上述终端也可以为无线终端，其中，无线终端可以经无线接入网(Radio Access Network,RAN)与一个或多个核心网(Core Network,CN)进行通信，无线终端可以是移动终端，如移动电话(或称为“蜂窝”电话)和具有移动终端的计算机，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言和/或数据。例如，个人通信业务(Personal Communication Service，PCS)电话、无绳电话、会话发起协议(Session Initiated Protocol， SIP)话机、无线本地环路(Wireless Local Loop，WLL)站、个人数字助理(Personal Digital Assistant，PDA)等设备。无线终端也可以称为系统、订户单元(subscriber unit)、订户站(subscriber station)，移动站(mobile station)、移动台(mobile)、远程站(remote station)、接入点(access point)、远程终端(remote terminal)、接入终端(access terminal)、用户终端(user terminal)、用户代理(user agent)、用户装置(user device)，本公开实施例中并不限定。
本公开实施例提供的技术方案可以适用于多种系统，尤其是5G系统。例如适用的系统可以是全球移动通讯(global system of mobile communication，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)通用分组无线业务(general packet radio service，GPRS)系统、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)系统、高级长期演进(long term evolution advanced，LTE-A)系统、通用移动系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)系统、5G新空口(New Radio,NR)系统等。这多种系统中均包括终端和网络设备。系统中还包括核心网部分，例如演进的分组系统(Evloved Packet System,EPS)、5G系统(5GS)等。
应理解，上述的图2为示意性的，上述场景中还可以包括其它网络设备，如还可以包括无线中继器设备和无线回传设备等，在图2中未示出。
需要说明的是，本公开实施例所提供的方法和装置是基于同一申请构思的，由于方法和装置解决问题的原理相似，因此装置和方法的实施可以相互参见，重复之处不再赘述。
图3为本公开一实施例提供的一种终端接入方法的流程示意图一。如图3所示，该终端接入方法可以包括如下步骤：
S301、终端通过直接通信接口向目标中继终端发送连接建立请求消息。
其中，连接建立请求消息用于请求与目标中继终端建立直接通信连接，该连接建立请求消息携带终端的身份标识信息，终端的身份标识信息用于指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。
其中，中继终端的身份具体理解是指终端期望在接入目标中继终端后以中继终端的方式工作。
示例性的，请参考图2，若该终端是远端终端201，则目标中继终端为中继终端1，身份标识信息用于指示该远端终端201是以远端终端的身份接入该中继终端1还是以中继终端的身份接入中继终端1。其中，以中继终端的身份接入中继终端1含义是远端终端201接入中继终端1后会开启中继功能，作为中继终端工作。
相应的，目标中继终端接收终端通过直接通信接口发送的连接建立请求消息。
进一步的，目标中继终端获取连接建立请求消息中的身份标识信息，并根据身份标识信息执行相应的操作，至于具体执行方式，在后续实施例中示出。
本公开提供的一种终端接入方法中，终端通过直接通信接口向目标中继终端发送连接建立请求消息，目标中继终端接收终端通过直接通信接口发送的连接建立请求消息。由于连接建立请求消息携带终端的身份标识信息，中继终端可以根据要接入的终端的身份标识信息执行相应操作，从而可以保证当有终端要接入目标中继终端时，目标中继终端能够正确识别要接入的终端的身份信息，从而采用和终端身份对应的操作，保证系统正常运作。
一些实施例中，连接建立请求消息可以采用PC5连接建立请求消息，其中，PC5连接建立请求消息可以是PC5-S信令和/或PC5-RRC信令。
另一些实施例中，终端的身份标识信息可以通过显式方式或者隐式方式携带在连接建立请求消息中。
一方面，终端的身份标识信息通过显式方式携带在连接建立请求消息中，包括：
在连接建立请求消息中携带指示信息，通过指示信息的取值来指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。
示例性的，在连接建立请求消息中携带指示信息(例如1bit)取值为0，则表示终端是以远端终端的身份接入目标中继终端；若该bit指示信息取值为1，则表示终端是以中继终端的身份接入目标中继终端。
另一方面，终端的身份标识信息通过隐式方式携带在连接建立请求消息中，包括：
在连接建立请求消息中可选的携带指示信息，通过是否携带指示信息来指示终端是以远端终端的身份接入中继终端，或者，以中继终端的身份接入目标中继终端。
示例性的，选择性的在连接建立请求消息携带指示信息(例如1bit)，若连接建立请求消息中携带该1bit指示信息，则表示终端是以中继终端的身份接入目标中继终端；若连接建立请求消息中未携带该1bit指示信息，则表示终端是以远端终端的身份接入目标中继终端。
需要说明的是，上述显示方式和隐式方式携带指示信息的方案为示例性的，其他类似的方式此处不再一一赘述。
图4为本公开实施例提供的一种终端接入方法的信令交互示意图二。如图4所示，本公开实施例提供的终端接入方法可以包括如下步骤：
S401、终端根据终端的身份，确定目标中继终端。
应理解，身份为远端终端的终端和身为为中继终端的终端在确定目标中继终端时，所采用的方式不同，接下来，结合具体实施例分别进行说明：
(1)若终端是以远端终端的身份接入目标中继终端，则在满足第一预设条件的中继终端中选择一个中继终端作为目标中继终端。
在实际应用中，对于第一预设条件，本公开实施例不做限定，例如，第一预设条件可以是基于AS层准和/或NAS准则确定的。
示例性的，以第一预设条件为AS层准则为例，第一预设条件可以是直接通信接口信道质量大于预设门限。即终端确定终端和其测量到的各个候选中继终端之间直接通信接口的信道质量(例如，SD-RSRP)，然后终端从满足直接通信接口信道质量条件(即大于预设门限)中唯一选择一个中继终端作为目标中继终端。
另一些实施例中，还可以根据NAS层的中继选择规则来确定候选中继终端是否满足第一预设要求，然后终端从满足第一预设条件的候选中继终端中选择一个中继终端作为目标中继终端。至于NAS中继选择规则的内容，本公开实施例不做具体限定。
(2)若终端是以中继终端的身份接入目标中继终端，则在满足第二预设条件的中继终端中选择N个中继终端为目标中继终端，N为大于等于1的整数。
其中，第二预设条件包括一下至少一项：
终端支持的中继工作模式包含目标中继终端当前使用的中继工作模式；
终端和中继终端之间的直接通信接口的信道质量高于预设门限。
S402、终端通过直接通信接口向目标中继终端发送连接建立请求消息。
应理解，步骤S402与图3所示实施例中的步骤S301的方案与有益效果类似，具体可参考上述实 施例，此处不再赘述。
S403、目标中继终端根据终端的身份标识信息，执行与终端的身份标识信息对应的目标操作。
接下来，结合步骤S4031～S4032分别对两种身份的终端对应的目标操作进行详细说明：
S4031、若确定终端是以远端终端的身份接入目标中继终端，则目标中继终端建立与终端的直接通信接口连接。
S4032、若确定终端是以中继终端的身份接入目标中继终端，则中继终端除了需要和终端建立直接通信接口连接外，还需要发送指示消息至目标网络设备、目标远端终端和上一跳中继终端中的至少一个设备；和/或，建立与所述终端的直接通信接口连接，并更新自身的路由表。
其中，指示信息用于指示目标网络设备、目标远端终端或者上一跳中继终端更新对应的路由表。
示例性的，请参考图2，目标中继终端是中继终端1为例，目标网络设备和目标远端终端即为图2中的目标设备203。
本步骤中，终端向中继终端1发送连接建立请求消息，其中携带终端的身份指示信息指示终端为中继终端，则中继终端1根据身份指示信息确定终端的身份是中继终端后，中继终端1会向目标设备203发送指示信息，作为一种可选的实施方式，还会向其他中继终端，比如中继终端2，中继终端M等发送指示信息。从而可以是目标设备203和/或中继终端2、中继终端M等更新路由信息。
一些实施例中，当终端是以中继终端的身份接入目标中继终端时，连接建立请求消息中还携带终端的中继能力指示信息，和/或，终端接入目标中继终端后使用的中继工作模式。
其中，中继工作模式和中继能力指示信息包括如下至少一种：
层2中继L2 relay；
层3中继L3 relay；
层2终端到网络设备中继L2 U2N relay；
层2终端到终端中继L2 U2U relay；
层3终端到网络设备中继L3 U2N relay；
层3终端到终端中继L3 U2U relay。
本公开实施例中，目标中继终端可以根据接入终端的身份执行不同操作，从而可以保证当有终端要接入目标中继终端时，目标中继终端能够正确识别要接入的终端的身份信息，从而采用和终端身份对应的操作，保证系统正常运作。
接下来，结合具体实施例说明当终端以中继终端的身份接入目标中继终端时的具体实施方案：
图5为本公开实施例提供的一种终端接入方法的信令交互示意图三。如图5所示，本公开实施例提供的终端接入方法包括如下步骤：
S501、终端根据终端的身份，确定目标中继终端。
其中，步骤S501和图4所示实施例中的步骤S401类似，此处不再赘述。
S502、终端接收目标中继终端广播的中继发现消息。
其中，中继发现消息中携带有目标中继终端的中继工作模式。
S503、终端根据目标中继终端的中继工作模式，确定终端接入目标中继终端后使用的中继工作模式。
S504、终端通过直接通信接口向目标中继终端发送连接建立请求消息。
其中，连接建立请求消息中还携带有终端的中继能力指示信息，和/或，终端接入目标中继终端后使用的中继工作模式。
S505、目标中继终端根据终端的身份标识信息，执行与终端的身份标识信息对应的目标操作。
其中，步骤S505～S505与图4所示实施例中的步骤S402～S403类似，此处不再赘述。
S506、目标中继终端根据连接建立请求消息中携带的终端的中继能力指示信息，确定终端接入目标中继终端后使用的中继工作模式。
S507、目标中继终端向终端发送连接建立请求消息对应的响应消息。
其中，响应消息中携带指示信息，指示信息用于指示终端接入目标中继终端后使用的中继工作模式。
相应的，终端接收目标中继终端发送的连接建立请求消息对应的响应消息，并获取响应消息中指示的终端接入目标中继终端后的中继工作模式，从而在接入该目标中继终端后，按照该中继工作模式进行工作。
在目标中继终端侧，本公开实施例提供了一种终端接入装置，应用于目标中继终端。图6为本公开实施例提供的一种终端接入装置的结构示意图。如图6所示，该终端接入装置600包括：
接收模块601，用于接收终端通过直接通信接口发送的连接建立请求消息，连接建立请求消息携带终端的身份标识信息，终端的身份标识信息用于指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。
作为一种可选的实施方式，该终端接入装置600还包括：处理模块602，用于根据终端的身份标识信息，执行与终端的身份标识信息对应的目标操作。
作为一种可选的实施方式，连接建立请求消息为PC5连接建立请求消息，PC5连接建立请求消息包括PC5-S信令和/或PC5-RRC信令。
作为一种可选的实施方式，在连接建立请求消息中携带指示信息，通过指示信息的取值来指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端；
或者，在连接建立请求消息中可选的携带指示信息，通过是否携带指示信息来指示终端是以远端终端的身份接入中继终端，或者，以中继终端的身份接入目标中继终端。
作为一种可选的实施方式，处理模块602具体用于：若确定终端是以远端终端的身份接入目标中继终端，则建立目标中继终端与终端的直接通信接口连接；
若确定终端是以中继终端的身份接入目标中继终端，则建立目标中继终端与终端的直接通信接口连接，并发送指示消息至目标网络设备、目标远端终端和上一跳中继终端中的至少一个设备，和/或，建立目标中继终端与终端的直接通信接口连接，并更新自身的路由表；
其中，指示信息用于指示目标网络设备、目标远端终端或者上一跳中继终端更新对应的路由表。
作为一种可选的实施方式，若终端是以中继终端的身份接入目标中继终端，连接建立请求消息中还携带终端的中继能力指示信息，和/或，终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，中继能力指示信息包括如下至少一种：层2中继L2 relay；层3中继L3 relay；层2终端到网络设备中继L2 U2N relay；层2终端到终端中继L2 U2U relay；层3终端到网络设备中继L3 U2N relay；层3终端到终端中继L3 U2U relay。
作为一种可选的实施方式，该终端接入装置600还包括：确定模块603，用于根据连接建立请求消息中携带的终端的中继能力指示信息，确定终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，该终端接入装置600还包括：发送模块604，用于向终端发送连接建立请求消息对应的响应消息，响应消息中携带指示信息，指示信息用于指示终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，中继工作模式包括如下至少一种：层2中继L2 relay；层3中继L3 relay；层2终端到网络设备中继L2 U2N relay；层2终端到终端中继L2 U2U relay；层3终端到网络设备中继L3 U2N relay；层3终端到终端中继L3 U2U relay。
在此需要说明的是，本公开提供的上述终端接入装置，能够相应地实现上述方法实施例中目标中继终端所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
在终端侧，本公开实施例提供了一种终端接入装置，应用于终端。图7为本公开实施例提供的一种终端接入装置的结构示意图二。如图7所示，该终端接入装置700包括：
发送模块701，用于通过直接通信接口向目标中继终端发送连接建立请求消息，连接建立请求消息携带终端的身份标识信息，终端的身份标识信息用于指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。
作为一种可选的实施方式，该终端接入装置700还包括：确定模块702，用于根据终端的身份，确定目标中继终端。
作为一种可选的实施方式，确定模块702具体用于，若终端是以远端终端的身份接入目标中继终端，则在满足第一预设条件的中继终端中选择一个中继终端作为目标中继终端；或者，若终端是以中继终端的身份接入目标中继终端，则在满足第二预设条件的中继终端中选择N个中继终端为目标中继终端，N为大于等于1的整数。
作为一种可选的实施方式，第二预设条件包括一下至少一项：终端支持的中继工作模式包含目标中继终端当前使用的中继工作模式；终端和中继终端之间的直接通信接口的信道质量高于预设门限。
作为一种可选的实施方式，将终端的身份标识信息通过显式方式或者隐式方式携带在连接建立请求消息中。
作为一种可选的实施方式，在连接建立请求消息中携带指示信息，通过指示信息的取值来指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端；
或者，在连接建立请求消息中可选的携带指示信息，通过是否携带指示信息来指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。
作为一种可选的实施方式，当终端是以中继终端的身份接入目标中继终端时，连接建立请求消息中还携带有终端的中继能力指示信息，和/或，终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，该终端接入装置700还包括：接收模块703，用于接收目标中继终端广播的中继发现消息，中继发现消息中携带有目标中继终端的中继工作模式；确定模块702，还用于根据目标中继终端的中继工作模式，确定终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，接收模块703，还用于接收目标中继终端发送的连接建立请求消息对应的响应消息，响应消息中携带指示信息，指示信息用于指示终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，中继工作模式包括以下至少一种：层2中继L2 relay；层3中继L3 relay；层2终端到网络设备中继L2 U2N relay；层2终端到终端中继L2 U2U relay；层3终端到网络设备中继L3 U2N relay；层3终端到终端中继L3 U2U relay。
作为一种可选的实施方式，中继能力指示信息包括以下至少一种：层2中继L2 relay；层3中继L3 relay；层2终端到网络设备中继L2 U2N relay；层2终端到终端中继L2 U2U relay；层3终端到网络设备中继L3 U2N relay；层3终端到终端中继L3 U2U relay。
在此需要说明的是，本公开提供的上述终端接入装置，能够相应地实现上述方法实施例中终端所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
图8为本公开实施例提供的一种中继终端的结构示意图。其中，该中继终端为目标中继终端，如图8所示，该目标中继终端包括：收发机801、处理器802和存储器803。
存储器803，用于存储计算机程序；
收发机801，用于在处理器802的控制下收发数据；
其中，在图8中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器802代表的一个或多个处理器和存储器803代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机801可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元，这些传输介质包括无线信道、有线信道、光缆等传输介质。处理器802负责管理总线架构和通常的处理，存储器803可以存储处理器802在执行操作时所使用的数据。
处理器802负责管理总线架构和通常的处理，存储器803可以存储处理器802在执行操作时所使用的数据。
作为一种可选的实施方式，处理器802可以是中央处埋器(central processing unit，CPU)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现场可编程门阵列(Field－Programmable Gate Array，FPGA)或复杂可编程逻辑器件(Complex Programmable Logic Device，CPLD)，处理器也可以采用多核架构。
处理器802通过调用存储器803存储的计算机程序，用于按照获得的可执行指令执行本公开实施例提供的有关目标中继终端的任一终端接入方法。处理器802与存储器803也可以物理上分开布置。
具体的，处理器802用于读取存储器803中的计算机程序并执行以下操作：接收终端通过直接通信接口发送的连接建立请求消息，连接建立请求消息携带终端的身份标识信息，终端的身份标识信息用于指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。
作为一种可选的实施方式，处理器802还用于执行如下操作：根据终端的身份标识信息，执行与终端的身份标识信息对应的目标操作。
作为一种可选的实施方式，连接建立请求消息为PC5连接建立请求消息，PC5连接建立请求消息包括PC5-S信令和/或PC5-RRC信令。
作为一种可选的实施方式，在连接建立请求消息中携带指示信息，通过指示信息的取值来指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。
或者，在连接建立请求消息中可选的携带指示信息，通过是否携带指示信息来指示终端是以远端终端的身份接入中继终端，或者，以中继终端的身份接入目标中继终端。
作为一种可选的实施方式，根据终端的身份标识信息，执行与终端的身份标识信息对应的目标操作，包括：若确定终端是以远端终端的身份接入目标中继终端，则通过直连通信接口与终端建立直连通信连接。
作为一种可选的实施方式，根据终端的身份标识信息，执行与终端的身份标识信息对应的目标操作，包括：
若确定终端是以中继终端的身份接入目标中继终端，则建立目标中继终端与终端的直接通信接口 连接，并发送指示消息至目标网络设备、目标远端终端和上一跳中继终端中的至少一个设备，和/或，建立目标中继终端与终端的直接通信接口连接，并更新自身的路由表；
其中，指示信息用于指示目标网络设备、目标远端终端或者上一跳中继终端更新对应的路由表。
作为一种可选的实施方式，若终端是以中继终端的身份接入目标中继终端，连接建立请求消息中还携带终端的中继能力指示信息，和/或，终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，中继能力指示信息包括如下至少一种：层2中继L2 relay；层3中继L3 relay；层2终端到网络设备中继L2 U2N relay；层2终端到终端中继L2 U2U relay；层3终端到网络设备中继L3 U2N relay；层3终端到终端中继L3 U2U relay。
作为一种可选的实施方式，处理器802还用于执行如下操作：根据连接建立请求消息中携带的终端的中继能力指示信息，确定终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，处理器802还用于执行如下操作：向终端发送连接建立请求消息对应的响应消息，响应消息中携带指示信息，指示信息用于指示终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，中继工作模式包括如下至少一种：层2中继L2 relay；层3中继L3 relay；层2终端到网络设备中继L2 U2N relay；层2终端到终端中继L2 U2U relay；层3终端到网络设备中继L3 U2N relay；层3终端到终端中继L3 U2U relay。
在此需要说明的是，本公开提供的上述中继终端，能够实现上述方法实施例中目标中继终端所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
图9为本公开实施例提供的一种终端的结构示意图。如图9所示，该终端包括：收发机901、处理器902和存储器903。
存储器903，用于存储计算机程序；
收发机901，用于在处理器902的控制下收发数据；
其中，在图9中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器902代表的一个或多个处理器和存储器903代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机901可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元，这些传输介质包括无线信道、有线信道、光缆等传输介质。处理器902负责管理总线架构和通常的处理，存储器903可以存储处理器902在执行操作时所使用的数据。
处理器902负责管理总线架构和通常的处理，存储器903可以存储处理器902在执行操作时所使用的数据。
作为一种可选的实施方式，处理器902可以是中央处埋器(central processing unit，CPU)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现场可编程门阵列(Field－Programmable Gate Array，FPGA)或复杂可编程逻辑器件(Complex Programmable Logic Device，CPLD)，处理器也可以采用多核架构。
处理器902通过调用存储器903存储的计算机程序，用于按照获得的可执行指令执行本公开实施例提供的有关目标中继终端的任一终端接入方法。处理器902与存储器903也可以物理上分开布置。
具体的，处理器902用于读取存储器903中的计算机程序并执行以下操作：
通过直接通信接口向目标中继终端发送连接建立请求消息，连接建立请求消息携带终端的身份标识信息，终端的身份标识信息用于指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。
作为一种可选的实施方式，处理器902还用于执行如下操作：根据终端的身份，确定目标中继终端。
作为一种可选的实施方式，根据终端的身份，确定目标中继终端，包括：若终端是以远端终端的身份接入目标中继终端，则在满足第一预设条件的中继终端中选择一个中继终端作为目标中继终端；或者，若终端是以中继终端的身份接入目标中继终端，则在满足第二预设条件的中继终端中选择N个中继终端为目标中继终端，N为大于等于1的整数。
作为一种可选的实施方式，第二预设条件包括一下至少一项：终端支持的中继工作模式包含目标中继终端当前使用的中继工作模式；终端和中继终端之间的直接通信接口的信道质量高于预设门限。
作为一种可选的实施方式，在连接建立请求消息中携带指示信息，通过指示信息的取值来指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端；
或者，在连接建立请求消息中可选的携带指示信息，通过是否携带指示信息来指示终端是以远端终端的身份接入目标中继终端，或者，以中继终端的身份接入目标中继终端。
作为一种可选的实施方式，当终端是以中继终端的身份接入目标中继终端时，连接建立请求消息中还携带有终端的中继能力指示信息，和/或，终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，处理器902还用于执行以下操作：接收目标中继终端广播的中继发现消息，中继发现消息中携带有目标中继终端的中继工作模式；根据目标中继终端的中继工作模式，确定终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，处理器902还用于执行以下操作：接收目标中继终端发送的连接建立请求消息对应的响应消息，响应消息中携带指示信息，指示信息用于指示终端接入目标中继终端后使用的中继工作模式。
作为一种可选的实施方式，中继工作模式包括以下至少一种：层2中继L2 relay；层3中继L3 relay；层2终端到网络设备中继L2 U2N relay；层2终端到终端中继L2 U2U relay；层3终端到网络设备中继L3 U2N relay；层3终端到终端中继L3 U2U relay。
作为一种可选的实施方式，中继能力指示信息包括以下至少一种：层2中继L2 relay；层3中继L3 relay；层2终端到网络设备中继L2 U2N relay；层2终端到终端中继L2 U2U relay；层3终端到网络设备中继L3 U2N relay；层3终端到终端中继L3 U2U relay。
在此需要说明的是，本公开提供的上述终端，能够实现上述方法实施例中终端侧所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
需要说明的是，本公开实施例中对单元的划分是示意性的，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。另外，在本公开各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
上述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个处理器可读取存储介质中。基于这样的理解，本公开的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个 存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或处理器(processor)执行本公开各个实施例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。
在中继终端侧，本公开实施例提供了一种处理器可读存储介质，处理器可读存储介质存储有计算机程序，计算机程序用于使得处理器能够实现上述方法实施例中目标中继终端所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
在终端侧，本公开实施例提供了一种处理器可读存储介质，处理器可读存储介质存储有计算机程序，计算机程序用于使得处理器能够实现上述方法实施例中终端侧所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
其中，处理器可读存储介质可以是处理器能够存取的任何可用介质或数据存储设备，包括但不限于磁性存储器(例如软盘、硬盘、磁带、磁光盘(MO)等)、光学存储器(例如CD、DVD、BD、HVD等)、以及半导体存储器(例如ROM、EPROM、EEPROM、非易失性存储器(NAND FLASH)、固态硬盘(SSD))等。
在中继终端侧，本公开的一实施例还提供一种包含指令的计算机程序产品，计算机程序存储在存储介质中，至少一个处理器可以从存储介质中读取计算机程序，至少一个处理器执行计算机程序时可实现上述方法实施例中目标中继终端所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
在终端侧，本公开的一实施例还提供一种包含指令的计算机程序产品，计算机程序存储在存储介质中，至少一个处理器可以从存储介质中读取计算机程序，至少一个处理器执行计算机程序时可实现上述方法实施例中终端所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
本公开实施例还提供一种通信系统，包括目标中继终端和终端。第目标中继终端能够执行上述方法实施例中目标中继终端侧所执行的所有方法步骤，且能够达到相同的技术效果。终端能够执行上述方法实施例中终端侧所执行的所有方法步骤，且能够达到相同的技术效果。在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
本领域内的技术人员应明白，本公开的实施例可提供为方法、系统、或计算机程序产品。因此，本公开可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本公开可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本公开是参照根据本公开实施例的方法、装置、和计算机程序产品的信令交互示意图和/或方框图来描述的。应理解可由计算机可执行指令实现信令交互示意图和/或方框图中的每一流程和/或方框、以及信令交互示意图和/或方框图中的流程和/或方框的结合。可提供这些计算机可执行指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在信令交互示意图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些处理器可执行指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的处理器可读存储器中，使得存储在该处理器可读存储器中的指令产生包括指令装置的制造品，该指令装 置实现在信令交互示意图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些处理器可执行指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在信令交互示意图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本公开进行各种改动和变型而不脱离本公开的精神和范围。这样，倘若本公开的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (39)

  1. 一种终端接入方法，其特征在于，应用于目标中继终端，包括：
    接收终端通过直接通信接口发送的连接建立请求消息，所述连接建立请求消息携带所述终端的身份标识信息，所述终端的身份标识信息用于指示所述终端是以远端终端的身份接入所述目标中继终端，或者，以中继终端的身份接入所述目标中继终端。
  2. 根据权利要求1所述的方法，其特征在于，还包括：
    根据所述终端的身份标识信息，执行与所述终端的身份标识信息对应的目标操作。
  3. 根据权利要求1所述的方法，其特征在于，所述连接建立请求消息为PC5连接建立请求消息，所述PC5连接建立请求消息包括PC5-S信令和/或PC5-RRC信令。
  4. 根据权利要求1所述的方法，其特征在于，在所述连接建立请求消息中携带指示信息，通过所述指示信息的取值来指示所述终端是以远端终端的身份接入所述目标中继终端，或者，以中继终端的身份接入所述目标中继终端；
    或者，在所述连接建立请求消息中可选的携带指示信息，通过是否携带所述指示信息来指示所述终端是以远端终端的身份接入所述中继终端，或者，以中继终端的身份接入所述目标中继终端。
  5. 根据权利要求2-4中任一项所述的方法，其特征在于，所述根据所述终端的身份标识信息，执行与所述终端的身份标识信息对应的目标操作，包括：
    若确定所述终端是以远端终端的身份接入所述目标中继终端，则建立与所述终端的直接通信接口连接；
    若确定所述终端是以中继终端的身份接入所述目标中继终端，则建立与所述终端的直接通信接口连接，并发送指示消息至目标网络设备、目标远端终端和上一跳中继终端中的至少一个设备，和/或，建立与所述终端的直接通信接口连接，并更新自身的路由表；
    其中，所述指示信息用于指示所述目标网络设备、所述目标远端终端或者所述上一跳中继终端更新对应的路由表。
  6. 根据权利要求1-4中任一项所述的方法，其特征在于，若所述终端是以中继终端的身份接入所述目标中继终端，所述连接建立请求消息中还携带所述终端的中继能力指示信息，和/或，所述终端接入所述目标中继终端后使用的中继工作模式。
  7. 根据权利要求6所述的方法，其特征在于，所述中继能力指示信息包括如下至少一种：
    层2中继L2 relay；
    层3中继L3 relay；
    层2终端到网络设备中继L2 U2N relay；
    层2终端到终端中继L2 U2U relay；
    层3终端到网络设备中继L3 U2N relay；
    层3终端到终端中继L3 U2U relay。
  8. 根据权利要求6所述的方法，其特征在于，还包括：
    根据连接建立请求消息中携带的所述终端的中继能力指示信息，确定所述终端接入所述目标中继终端后使用的中继工作模式。
  9. 根据权利要求8所述的方法，其特征在于，在确定所述终端接入所述目标中继终端后使用的中继工作模式之后，还包括：
    向所述终端发送所述连接建立请求消息对应的响应消息，所述响应消息中携带指示信息，所述指示信息用于指示所述终端接入所述目标中继终端后使用的中继工作模式。
  10. 根据权利要求6所述的接入方法，其特征在于，所述中继工作模式包括如下至少一种：
    层2中继L2 relay；
    层3中继L3 relay；
    层2终端到网络设备中继L2 U2N relay；
    层2终端到终端中继L2 U2U relay；
    层3终端到网络设备中继L3 U2N relay；
    层3终端到终端中继L3 U2U relay。
  11. 一种终端接入方法，其特征在于，应用于终端，包括：
    通过直接通信接口向目标中继终端发送连接建立请求消息，所述连接建立请求消息携带所述终端的身份标识信息，所述终端的身份标识信息用于指示所述终端是以远端终端的身份接入所述目标中继终端，或者，以中继终端的身份接入所述目标中继终端。
  12. 根据权利要求11所述的方法，其特征在于，在通过直接通信接口向目标中继终端发送连接建立请求消息之前，还包括：
    根据所述终端的身份，确定目标中继终端。
  13. 根据权利要求12所述的方法，其特征在于，所述根据所述终端的身份，确定目标中继终端，包括：
    若所述终端是以远端终端的身份接入目标中继终端，则在满足第一预设条件的中继终端中选择一个中继终端作为目标中继终端；或者，
    若所述终端是以中继终端的身份接入目标中继终端，则在满足第二预设条件的中继终端中选择N个中继终端为目标中继终端，N为大于等于1的整数。
  14. 根据权利要求13所述的方法，其特征在于，所述第二预设条件包括一下至少一项：
    所述终端支持的中继工作模式包含目标中继终端当前使用的中继工作模式；
    所述终端和中继终端之间的直接通信接口的信道质量高于预设门限。
  15. 根据权利要求11所述的方法，其特征在于，在所述连接建立请求消息中携带指示信息，通过所述指示信息的取值来指示所述终端是以远端终端的身份接入所述目标中继终端，或者，以中继终端的身份接入所述目标中继终端；
    或者，在所述连接建立请求消息中可选的携带指示信息，通过是否携带所述指示信息来指示所述终端是以远端终端的身份接入所述目标中继终端，或者，以中继终端的身份接入所述目标中继终端。
  16. 根据权利要求11-15中任一项所述的方法，其特征在于，当所述终端是以中继终端的身份接入所述目标中继终端时，所述连接建立请求消息中还携带有所述终端的中继能力指示信息，和/或，所述终端接入所述目标中继终端后使用的中继工作模式。
  17. 根据权利要求16所述的方法，其特征在于，还包括：
    接收所述目标中继终端广播的中继发现消息，所述中继发现消息中携带有所述目标中继终端的中继工作模式；
    根据所述目标中继终端的中继工作模式，确定所述终端接入所述目标中继终端后使用的中继工作模式。
  18. 根据权利要求11所述的方法，其特征在于，在确定所述终端接入所述目标中继终端后使用的 中继工作模式之后，还包括：
    接收所述目标中继终端发送的连接建立请求消息对应的响应消息，所述响应消息中携带指示信息，所述指示信息用于指示所述终端接入所述目标中继终端后使用的中继工作模式。
  19. 根据权利要求16所述的方法，其特征在于，所述中继工作模式包括以下至少一种：
    层2中继L2 relay；
    层3中继L3 relay；
    层2终端到网络设备中继L2 U2N relay；
    层2终端到终端中继L2 U2U relay；
    层3终端到网络设备中继L3 U2N relay；
    层3终端到终端中继L3 U2U relay。
  20. 根据权利要求16所述的方法，其特征在于，所述中继能力指示信息包括以下至少一种：
    层2中继L2 relay；
    层3中继L3 relay；
    层2终端到网络设备中继L2 U2N relay；
    层2终端到终端中继L2 U2U relay；
    层3终端到网络设备中继L3 U2N relay；
    层3终端到终端中继L3 U2U relay。
  21. 一种终端接入装置，其特征在于，应用于目标中继终端，包括：
    接收模块，用于接收终端通过直接通信接口发送的连接建立请求消息，所述连接建立请求消息携带所述终端的身份标识信息，所述终端的身份标识信息用于指示所述终端是以远端终端的身份接入所述目标中继终端，或者，以中继终端的身份接入所述目标中继终端。
  22. 一种终端接入装置，其特征在于，应用于终端，包括：
    发送模块，用于通过直接通信接口向目标中继终端发送连接建立请求消息，所述连接建立请求消息携带所述终端的身份标识信息，所述终端的身份标识信息用于指示所述终端是以远端终端的身份接入所述目标中继终端，或者，以中继终端的身份接入所述目标中继终端。
  23. 一种目标中继终端，其特征在于，包括：
    存储器，用于存储计算机程序；
    收发机，用于在处理器的控制下收发数据；
    处理器，用于读取所述存储器中的计算机程序并执行以下操作：
    接收终端通过直接通信接口发送的连接建立请求消息，所述连接建立请求消息携带所述终端的身份标识信息，所述终端的身份标识信息用于指示所述终端是以远端终端的身份接入所述目标中继终端，或者，以中继终端的身份接入所述目标中继终端。
  24. 根据权利要求23所述的目标中继终端，其特征在于，所述处理器还用于执行如下操作：
    根据所述终端的身份标识信息，执行与所述终端的身份标识信息对应的目标操作。
  25. 根据权利要求23所述的目标中继终端，其特征在于，所述连接建立请求消息为PC5连接建立请求消息，所述PC5连接建立请求消息包括PC5-S信令和/或PC5-RRC信令。
  26. 根据权利要求23所述的目标中继终端，其特征在于，在所述连接建立请求消息中携带指示信息，通过所述指示信息的取值来指示所述终端是以远端终端的身份接入所述目标中继终端，或者，以中继终端的身份接入所述目标中继终端；
    或者，在所述连接建立请求消息中可选的携带指示信息，通过是否携带所述指示信息来指示所述终端是以远端终端的身份接入所述中继终端，或者，以中继终端的身份接入所述目标中继终端。
  27. 根据权利要求23-26中任一项所述的目标中继终端，其特征在于，所述根据所述终端的身份标识信息，执行与所述终端的身份标识信息对应的目标操作，包括：
    若确定所述终端是以远端终端的身份接入所述目标中继终端，则通过直连通信接口与所述终端建立直连通信连接；
    若确定所述终端是以中继终端的身份接入所述目标中继终端，则建立与所述终端的直接通信接口连接，并发送指示消息至目标网络设备、目标远端终端和上一跳中继终端中的至少一个设备，和/或，建立与所述终端的直接通信接口连接，并更新自身的路由表；
    其中，所述指示信息用于指示所述目标网络设备、所述目标远端终端或者所述上一跳中继终端更新对应的路由表。
  28. 根据权利要求23-26中任一项所述的目标中继终端，其特征在于，若所述终端是以中继终端的身份接入所述目标中继终端，所述连接建立请求消息中还携带所述终端的中继能力指示信息，和/或，所述终端接入所述目标中继终端后使用的中继工作模式。
  29. 根据权利要求28所述的目标中继终端，其特征在于，所述处理器还用于执行如下操作：
    根据连接建立请求消息中携带的所述终端的中继能力指示信息，确定所述终端接入所述目标中继终端后使用的中继工作模式。
  30. 一种终端，其特征在于，包括：
    存储器，用于存储计算机程序；
    收发机，用于在处理器的控制下收发数据；
    处理器，用于读取所述存储器中的计算机程序并执行以下操作：
    通过直接通信接口向目标中继终端发送连接建立请求消息，所述连接建立请求消息携带所述终端的身份标识信息，所述终端的身份标识信息用于指示所述终端是以远端终端的身份接入所述目标中继终端，或者，以中继终端的身份接入所述目标中继终端。
  31. 根据权利要求30所述的终端，其特征在于，所述处理器还用于执行如下操作：
    根据所述终端的身份，确定目标中继终端。
  32. 根据权利要求31所述的终端，其特征在于，所述根据所述终端的身份，确定目标中继终端，包括：
    若所述终端是以远端终端的身份接入目标中继终端，则在满足第一预设条件的中继终端中选择一个中继终端作为目标中继终端；或者，
    若所述终端是以中继终端的身份接入目标中继终端，则在满足第二预设条件的中继终端中选择N个中继终端为目标中继终端，N为大于等于1的整数。
  33. 根据权利要求32所述的终端，其特征在于，所述第二预设条件包括一下至少一项：
    所述终端支持的中继工作模式包含目标中继终端当前使用的中继工作模式；
    所述终端和中继终端之间的直接通信接口的信道质量高于预设门限。
  34. 根据权利要求30所述的终端，其特征在于，在所述连接建立请求消息中携带指示信息，通过所述指示信息的取值来指示所述终端是以远端终端的身份接入所述目标中继终端，或者，以中继终端的身份接入所述目标中继终端；
    或者，在所述连接建立请求消息中可选的携带指示信息，通过是否携带所述指示信息来指示所述 终端是以远端终端的身份接入所述目标中继终端，或者，以中继终端的身份接入所述目标中继终端。
  35. 根据权利要求30-34中任一项所述的终端，其特征在于，当所述终端是以中继终端的身份接入所述目标中继终端时，所述连接建立请求消息中还携带有所述终端的中继能力指示信息，和/或，所述终端接入所述目标中继终端后使用的中继工作模式。
  36. 根据权利要求35所述的终端，其特征在于，所述处理器还用于执行以下操作：
    接收所述目标中继终端广播的中继发现消息，所述中继发现消息中携带有所述目标中继终端的中继工作模式；
    根据所述目标中继终端的中继工作模式，确定所述终端接入所述目标中继终端后使用的中继工作模式。
  37. 根据权利要求35所述的终端，其特征在于，所述处理器还用于执行以下操作：
    接收所述目标中继终端发送的连接建立请求消息对应的响应消息，所述响应消息中携带指示信息，所述指示信息用于指示所述终端接入所述目标中继终端后使用的中继工作模式。
  38. 一种处理器可读存储介质，其特征在于，所述处理器可读存储介质存储有计算机程序，所述计算机程序用于使处理器执行权利要求1至20中任一项所述的终端接入方法。
  39. 一种计算机程序产品，其特征在于，包括：计算机程序，所述计算机程序被处理器执行时实现如权利要求1至20中任一项所述的终端接入方法。
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