WO2023029679A1 - 第一中继节点发现方法、装置及存储介质 - Google Patents

第一中继节点发现方法、装置及存储介质 Download PDF

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Publication number
WO2023029679A1
WO2023029679A1 PCT/CN2022/100366 CN2022100366W WO2023029679A1 WO 2023029679 A1 WO2023029679 A1 WO 2023029679A1 CN 2022100366 W CN2022100366 W CN 2022100366W WO 2023029679 A1 WO2023029679 A1 WO 2023029679A1
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WIPO (PCT)
Prior art keywords
relay node
message
target service
remote terminal
relay
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PCT/CN2022/100366
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English (en)
French (fr)
Inventor
邓强
Original Assignee
大唐移动通信设备有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 大唐移动通信设备有限公司 filed Critical 大唐移动通信设备有限公司
Priority to EP22862820.2A priority Critical patent/EP4398646A1/en
Publication of WO2023029679A1 publication Critical patent/WO2023029679A1/zh

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    • 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
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the present disclosure relates to the communication field, and in particular, to a method, device and storage medium for discovering a first relay node.
  • the remote terminal communicates with the network through the terminal-to-network relay node (UE-to-Network Relay) (hereinafter referred to as the first relay node) to obtain relevant network service.
  • UE-to-Network Relay terminal-to-Network Relay
  • the remote terminal Before the remote terminal communicates with the network device through the first relay node to obtain related network services, it needs to first discover the first relay node through a discovery process, and then establish a connection with it.
  • the discovery process of the first relay node is limited by the distance between the remote terminal and the first relay node. When the distance between the remote terminal and the first relay node is relatively long, it is difficult for the remote terminal to discover the first relay node. relay node.
  • the present disclosure provides a first relay node discovery method, device and storage medium, which are used to solve the problem that it is difficult for a remote terminal to discover a relay node from a terminal to a network that is far away.
  • the present disclosure provides a first relay node discovery method, which is applied to a second relay node.
  • the first relay node discovery method includes: receiving a first message, the first message carrying a service identifier of a target service, The first message is used to notify the second relay node to assist in finding the first relay node capable of accessing the target service; and broadcast the first message.
  • the first message is used to notify the second relay node to assist the remote terminal to perform the target service to find the first relay node that can access the target service; receiving the first message includes: receiving the remote terminal The first message broadcast by the terminal; or, receiving the first message from the remote terminal broadcast by another second relay node; wherein, the first message also carries the terminal identifier of the remote terminal.
  • the first message is used to notify the second relay node to assist the first relay node capable of accessing the target service to be discovered by the remote terminal to perform the target service; receiving the first message includes: receiving The first message broadcast by the first relay node; or, receiving the first message from the first relay node broadcast by another second relay node; wherein, the first message also carries the node identifier of the first relay node.
  • the first message also carries indication information whether the target service is allowed to be accessed through a relay; broadcasting the first message includes: determining whether the target service is allowed to be accessed through a relay according to the first message Access; if the target service is allowed to access through relay, then broadcast the first message.
  • the first message also carries the remaining hops for the target service to be accessed through the relay; if the target service is allowed to be accessed through the relay, broadcast the first message, including: determining the target service Whether the remaining number of hops allowed by the service to be accessed through relay is greater than or equal to 1; if the remaining number of hops is greater than or equal to 1, update the remaining number of hops and broadcast the first message, wherein the broadcasted first message carries the updated remaining hops.
  • broadcasting the first message includes: if the target service is allowed to be accessed through a relay, determining whether the target service is allowed to be accessed business; if the target business is included, the first message is broadcast.
  • the method before receiving the first message, further includes: acquiring policy parameters of the second relay node from the network device, where the policy parameters include service identifiers of services allowed to be accessed by the second relay node.
  • the network device includes a policy control function PCF
  • obtaining the policy parameter of the second relay node from the network device includes: sending a second message to the PCF, and the second message is used to request the policy parameter from the PCF, And the second message indicates the capability of the second relay node; receiving the policy parameter configured by the PCF for the second relay node.
  • after broadcasting the first message further includes: receiving a response message returned by the first relay node, where the response message is used to instruct the second relay node to assist in notifying the remote terminal that it has found that the target service can be accessed the first relay node; and send a response message to the remote terminal.
  • the first message after broadcasting the first message, it further includes: receiving a connection request message returned by the remote terminal, where the connection request message is used to instruct the second relay node to assist the remote terminal to connect to the first A relay node; establishing communication between the remote terminal and the first relay node based on the second relay node in response to the connection request message.
  • the present disclosure provides a first relay node discovery method, which is applied to a remote terminal.
  • the first relay node discovery method includes: determining the first target service; broadcasting the service identifier carrying the target service and the terminal identifier of the remote terminal The first message is used to notify the second relay node receiving the first message to assist the remote terminal in finding the first relay node capable of accessing the target service.
  • the first message before broadcasting the first message, it further includes: obtaining policy parameters of the remote terminal from the network device, and the policy parameters include at least one of the following: services that the remote terminal is allowed to access, services that the remote terminal is allowed to access Whether the business is allowed to be accessed through the relay mode, and the maximum number of hops allowed to be accessed through the relay mode for the business that the remote terminal is allowed to access.
  • the present disclosure provides a first relay node discovery method, which is applied to the first relay node.
  • the first relay node discovery method includes: determining the target service that the first relay node is allowed to access; broadcasting the target service The first message of the service identifier of the service and the node identifier of the first relay node, the first message is used to notify the second relay node receiving the first message to assist the first relay node to be discovered by the remote terminal of the target service to be executed .
  • the first message before broadcasting the first message, it further includes: acquiring policy parameters of the first relay node from the network device, where the policy parameters include at least one of the following: services allowed to be accessed by the first relay node, Whether the service allowed to be accessed by the first relay node is allowed to be accessed through a relay mode, and the maximum number of hops allowed to be accessed through a relay mode for the business allowed to be accessed by the first relay node.
  • the present disclosure provides a first relay node discovery device, which is applied to a second relay node.
  • the first relay node discovery device includes a memory, a transceiver, and a processor; a memory for storing computer programs; a machine, configured to send and receive data under the control of a processor; the processor, configured to read a computer program in a memory and perform the following operations: receive a first message, the first message carries a service identifier of a target service, and the first message uses Informing the second relay node to assist in finding the first relay node capable of accessing the target service; and broadcasting the first message.
  • the first message is used to notify the second relay node to assist the remote terminal to perform the target service to find the first relay node that can access the target service; the processor also performs the following operations: receiving the remote terminal The first message broadcast by the terminal; or, receiving the first message from the remote terminal broadcast by another second relay node; wherein, the first message also carries the terminal identifier of the remote terminal.
  • the first message is used to notify the second relay node to assist the first relay node capable of accessing the target service to be discovered by the remote terminal to perform the target service; the processor also performs the following operations: receiving The first message broadcast by the first relay node; or, receiving the first message from the first relay node broadcast by another second relay node; wherein, the first message also carries the node identifier of the first relay node.
  • the first message also carries indication information indicating whether the target service is allowed to be accessed through a relay; the processor also performs the following operations: according to the first message, determine whether the target service is allowed to be accessed through a relay Access; if the target service is allowed to access through relay, then broadcast the first message.
  • the first message also carries the remaining hops allowed by the target service to be accessed through a relay; the processor also performs the following operation: determine the remaining hops allowed to be accessed by the target service through a relay Whether it is greater than or equal to 1; if the remaining hop count is greater than or equal to 1, update the remaining hop count and broadcast a first message, wherein the broadcasted first message carries the updated remaining hop count.
  • the processor further performs the following operations: if the target service is allowed to be accessed through a relay, determine whether the target service is included in the services allowed to be accessed; if the target service is included, broadcast the first message .
  • the processor further performs the following operation: acquire policy parameters of the second relay node from the network device, where the policy parameters include service identifiers of services allowed to be accessed by the second relay node.
  • the network device includes a policy control function PCF
  • the processor further performs the following operations: sending a second message to the PCF, where the second message is used to request a policy parameter from the PCF, and the second message indicates that the second Capabilities of the relay node; receiving policy parameters configured by the PCF for the second relay node.
  • the processor further performs the following operation: receive a response message returned by the first relay node, where the response message is used to instruct the second relay node to assist in notifying the remote terminal that the first relay node that can access the target service has been found A relay node; sending a response message to the remote terminal.
  • the processor further performs the following operations: receiving a connection request message returned by the remote terminal, where the connection request message is used to instruct the second relay node to assist the remote terminal to connect to the first relay capable of accessing the target service A node; establishing communication between the remote terminal and the first relay node based on the second relay node in response to the connection request message.
  • the present disclosure provides a first relay node discovery device, which is applied to a remote terminal.
  • the first relay node discovery device includes a memory, a transceiver, and a processor: the memory is used to store computer programs; the transceiver is used to To send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations: determine the first target service; broadcast the first message carrying the service identifier of the target service and the terminal identifier of the remote terminal , the first message is used to notify the second relay node receiving the first message to assist the remote terminal in finding the first relay node capable of accessing the target service.
  • the processor further performs the following operations: acquire policy parameters of the remote terminal from the network device, and the policy parameters include at least one of the following: services allowed to be accessed by the remote terminal, services allowed to be accessed by the remote terminal Whether to allow access via relay, and the maximum number of hops allowed to be accessed via relay for services that are allowed to be accessed by remote terminals.
  • the present disclosure provides a device for discovering a first relay node, which is applied to a first relay node.
  • the device for discovering a first relay node includes a memory, a transceiver, and a processor; a memory for storing computer programs; The machine is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations: determine the target service that the first relay node is allowed to access; broadcast the service identification that carries the target service and the first message of the node identifier of the first relay node, the first message is used to notify the second relay node receiving the first message to assist the first relay node to be discovered by the remote terminal to execute the target service.
  • the processor further performs the following operation: acquire policy parameters of the first relay node from the network device, where the policy parameters include at least one of the following: services allowed to be accessed by the first relay node, first Whether the service allowed to be accessed by the relay node is allowed to be accessed through the relay mode, and the maximum number of hops allowed to be accessed through the relay mode for the service allowed to be accessed by the first relay node.
  • the present disclosure provides a device for discovering a first relay node, which is applied to a second relay node.
  • the device for discovering a first relay node includes: a receiving unit, configured to receive a first message, and the first message carries a target The service identifier of the service, the first message is used to notify the second relay node to assist in finding the first relay node that can access the target service; the sending unit is used to broadcast the first message.
  • the first message is used to notify the second relay node to assist the remote terminal to perform the target service to find the first relay node capable of accessing the target service;
  • the receiving unit is specifically configured to: receive the remote terminal The broadcasted first message; or, receiving the first message from the remote terminal broadcasted by other second relay nodes; wherein, the first message also carries the terminal identifier of the remote terminal.
  • the first message is used to notify the second relay node to assist the first relay node capable of accessing the target service to be discovered by the remote terminal to perform the target service;
  • the receiving unit is specifically configured to: receive the first relay node A first message broadcast by a relay node; or, receiving a first message broadcast by another second relay node from the first relay node; wherein, the first message also carries the node identifier of the first relay node.
  • the first message also carries indication information indicating whether the target service is allowed to be accessed through a relay; the sending unit is specifically configured to: determine whether the target service is allowed to be accessed through a relay according to the first message If the target service is allowed to be accessed through the relay mode, broadcast the first message.
  • the first message also carries the remaining hops allowed by the target service to be accessed through a relay; the sending unit is specifically configured to: determine whether the remaining hops allowed to be accessed by a relay greater than or equal to 1; if the remaining hop count is greater than or equal to 1, update the remaining hop count and broadcast a first message, wherein the broadcasted first message carries the updated remaining hop count.
  • the sending unit is specifically configured to: if the target service is allowed to be accessed through a relay, determine whether the allowed services include the target service; if the target service is included, broadcast the first message.
  • the device for discovering the first relay node further includes: a configuration unit, configured to acquire policy parameters of the second relay node from the network device, where the policy parameters include services allowed to be accessed by the second relay node business identity.
  • the network device includes a policy control function PCF
  • the configuration unit is specifically configured to: send a second message to the PCF, the second message is used to request a policy parameter from the PCF, and the second message indicates that the second relay The capability of the node; receiving policy parameters configured by the PCF for the second relay node.
  • the receiving unit is further configured to: receive a response message returned by the first relay node, where the response message is used to instruct the second relay node to assist in notifying the remote terminal that the first relay node that can access the target service has been found.
  • Relay node sends a response message to the remote terminal.
  • the receiving unit is further configured to: receive a connection request message returned by the remote terminal, where the connection request message is used to instruct the second relay node to assist the remote terminal to connect to the first relay node capable of accessing the target service ; establishing communication between the remote terminal and the first relay node based on the second relay node in response to the connection request message.
  • the present disclosure provides a device for discovering a first relay node, which is applied to a remote terminal.
  • the device for discovering a first relay node includes: a determining unit, configured to determine a first target service; a sending unit, configured to broadcast a carrying target service A first message of the service identifier of the service and the terminal identifier of the remote terminal, the first message is used to notify the second relay node receiving the first message to assist the remote terminal in finding the first relay node capable of accessing the target service.
  • the device for discovering the first relay node further includes: a configuration unit, configured to acquire policy parameters of the remote terminal from the network device, where the policy parameters include at least one of the following: services that the remote terminal is allowed to access, Whether the service that the remote terminal is allowed to access is allowed to be accessed through a relay, and the maximum number of hops that the service that the remote terminal is allowed to access is allowed to be accessed through a relay.
  • a configuration unit configured to acquire policy parameters of the remote terminal from the network device, where the policy parameters include at least one of the following: services that the remote terminal is allowed to access, Whether the service that the remote terminal is allowed to access is allowed to be accessed through a relay, and the maximum number of hops that the service that the remote terminal is allowed to access is allowed to be accessed through a relay.
  • the present disclosure provides a device for discovering a first relay node, which is applied to a first relay node.
  • the device for discovering a first relay node includes: a determining unit, configured to determine a target that the first relay node is allowed to access Service; a sending unit, configured to broadcast a first message carrying the service identifier of the target service and the node identifier of the first relay node, the first message is used to notify the second relay node receiving the first message to assist the first relay Nodes are discovered by remote terminals to perform target services.
  • the apparatus for discovering the first relay node further includes: a configuration unit, configured to acquire policy parameters of the first relay node from the network device, and the policy parameters include at least one of the following: the first relay node The services allowed to be accessed, whether the services allowed to be accessed by the first relay node are allowed to be accessed through the relay mode, and the maximum number of hops allowed to be accessed through the relay mode for the services allowed to be accessed by the first relay node.
  • 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 first medium of the first aspect, the second aspect, or the third aspect. Following node discovery method.
  • the present disclosure provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and the computer program is used to enable a computer to execute the first relay node of the first aspect, the second aspect, or the third aspect Discovery method.
  • the present disclosure provides a computer program product containing instructions.
  • the instructions When the instructions are run on a computer, the computer is made to execute the first relay node discovery method according to the first aspect, the second aspect or the third aspect.
  • the present disclosure provides a communication system, including any of the above first relay nodes, at least one of the above any second relay nodes, and any of the above remote terminals.
  • the present disclosure provides a first relay node discovery method, device and storage medium.
  • the second relay node broadcasts the first message after receiving the first message, wherein the first message carries the service identifier of the target service, The first message is used to notify the second relay node to assist in finding the first relay node capable of accessing the target service. Therefore, in the discovery process of the first relay node, the remote terminal does not directly discover the first relay node, but discovers the first relay node through multi-hop based on the second relay node, increasing the first relay node
  • the distance range for the node to be discovered expands the network coverage and solves the problem that the remote terminal is difficult to find the first relay node when it is far away from the first relay node.
  • Figure 1 is an example diagram of the network architecture of ProSe in the 5G system
  • FIG. 2 is a schematic diagram of an application scenario provided by an embodiment of the present disclosure
  • FIG. 3 is a flowchart of a first relay node discovery method provided by an embodiment of the present disclosure
  • FIG. 4 is a flowchart of a first relay node discovery method provided by another embodiment of the present disclosure.
  • FIG. 5 is a flowchart of a first relay node discovery method provided by another embodiment of the present disclosure.
  • FIG. 6 is a schematic flow diagram of a network device configuring policy parameters for a terminal (the terminal may be a first relay node, a second relay node, or a remote terminal) provided by an embodiment of the present disclosure;
  • FIG. 7 is a schematic structural diagram of a device for discovering a first relay node according to an embodiment of the present disclosure
  • FIG. 8 is a schematic structural diagram of a device for discovering a first relay node according to another embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a device for discovering a first relay node according to another embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a device for discovering a first relay node according to another embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of a first relay node discovery device provided by another embodiment of the present disclosure.
  • Fig. 12 is a schematic structural diagram of an apparatus for discovering a first relay node according to another embodiment of the present disclosure.
  • At least one means one or more, and “plurality” means two or more.
  • “And/or” describes the association relationship of associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the contextual objects are an “or” relationship.
  • “At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items.
  • At least one item (piece) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple .
  • each step or operation in the embodiment of the present disclosure is only an example, and the embodiment of the present disclosure may also perform other operations or variations of various operations.
  • each step may be performed in a different order presented in the embodiments of the present disclosure, and it may not be necessary to perform all operations in the embodiments of the present disclosure.
  • Remote terminal a terminal that cannot directly connect to the network due to poor signal quality of the cellular network communication interface (referred to as Uu interface, the communication interface between the terminal and the network) outside the network coverage .
  • Uu interface the cellular network communication interface
  • Terminal-to-network relay node (referred to as UE-to-Network Relay for short) (hereinafter collectively referred to as the first relay node): a terminal with relay function, one side of which is registered in the network through the Uu interface, and establishes protocol data Unit (Protocol Data Unit, PUD) session and Quality of Service (Quality of Service, QOS) flow to realize the communication between itself and the network, and the other side is through the direct connection communication interface (which can be referred to as PC5 interface, the communication interface between terminals ) communicates with the remote terminal and the terminal-to-terminal relay node, forwards the communication data of the remote terminal to the network, and achieves the purpose of communicating between the remote terminal and the network.
  • PUD Protocol Data Unit
  • QOS Quality of Service
  • Terminal-to-terminal relay node (referred to as UE-to-UE Relay for short) (hereinafter collectively referred to as the second relay node): a terminal with a relay function, both sides of which communicate with other terminals through the PC5 interface.
  • the communication data of the terminal on one side is forwarded to the terminal on the other side to establish communication between different terminals.
  • FIG. 1 is an example diagram of a ProSe network architecture in a 5G system.
  • the remote terminal communicates with the first relay node through the PC5 interface, and the first relay node forwards the communication data from the remote terminal to the 5G network through the Uu interface to realize the communication between the remote terminal and the network.
  • the remote terminal before the remote terminal communicates with the first relay node, it needs to discover the first relay node.
  • the remote terminal In the discovery scheme of the first relay node, the remote terminal is only supported to discover the first relay node through one hop, but the remote terminal is not supported to discover the first relay node through multiple hops. Therefore, in some scenarios (for example, in a forest, in a basement), the distance between the remote terminal and the first relay node is relatively long, and it is difficult for the remote terminal to find the first relay node, resulting in the remote terminal being unable to connect to the network.
  • the second relay node after receiving the first message carrying the service identifier of the target service, the second relay node broadcasts the first message to assist A first relay node capable of accessing the target service is found.
  • the remote terminal discovers the first relay node through multiple hops, which expands the distance range that the remote terminal can discover the first relay node, expands the network coverage, improves the success rate of the remote terminal connecting to the network, and is also conducive to saving Power consumption of the remote terminal.
  • the method and the device are conceived based on the same application. Since the principle of solving problems of the method and the device is similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.
  • 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
  • the terminal involved in the embodiments of the present disclosure may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem.
  • the name of the terminal may be different.
  • the terminal may be called User Equipment (User Equipment, UE).
  • the wireless terminal can communicate with one or more core networks (Core Network, CN) via the radio access network (Radio Access Network, RAN), and the wireless terminal can be a mobile terminal, such as a mobile phone (or called a "cellular" phone)
  • computers with mobile terminals such as portable, pocket, hand-held, built-in computer or vehicle-mounted mobile devices, which exchange speech 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 network device involved in the embodiments of the present disclosure may be a base station, and the base station may include multiple cells that provide services for terminals.
  • the base station can also be called an access point, or it can be a device in the access network that communicates with wireless terminals through one or more sectors on the air interface, or by other names.
  • Network equipment may be used to interchange received over-the-air frames with Internet Protocol (IP) packets and act as a router between the wireless terminal and the rest of the access network, which may include Internet Protocol (IP) packets. (IP) communication network.
  • IP Internet Protocol
  • Network devices may also coordinate attribute management for the air interface.
  • the network equipment involved in the embodiments of the present disclosure may be a network equipment (Base Transceiver Station, BTS) in Global System for Mobile communications (GSM) or Code Division Multiple Access (Code Division Multiple Access, CDMA) ), it can also be a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or it can be an evolved network device in a long-term evolution (long term evolution, LTE) system (evolutional Node B, eNB or e-NodeB), 5G base station (gNB) in the 5G network architecture (next generation system), can also be a home evolved base station (Home evolved Node B, HeNB), relay node (relay node) , a home base station (femto), a pico base station (pico), etc., are not limited in this embodiment of the present disclosure.
  • a network device may include a centralized unit (centralized unit, CU) node and a distributed unit (distributed unit, DU) node
  • MIMO transmission can be Single User MIMO (Single User MIMO, SU-MIMO) or Multi-User MIMO ( Multiple User MIMO, MU-MIMO).
  • MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or diversity transmission, precoding transmission, or beamforming transmission, etc.
  • FIG. 2 is a schematic diagram of an application scenario provided by an embodiment of the present disclosure.
  • this embodiment provides a communication system, which includes a network device 210 , a first relay node 220 , a second relay node 230 and a remote terminal 240 .
  • the remote terminal 240 may discover the first relay node 220 through one or more second relay nodes 230 .
  • one of the remote terminals 240 discovers the first relay node 220 through a second relay node 230 (the remote terminal 240 passes two hops discover the first relay node 220), another remote terminal 240 discovers the first relay node 220 through two second relay nodes 230 in turn (the remote terminal 240 discovers the first relay node 220 through three hops).
  • FIG. 3 is a schematic flowchart of a first relay node discovery method provided by an embodiment of the present disclosure. As shown in Figure 3, the method of this embodiment may include:
  • the second relay node receives a first message, where the first message carries a service identifier of a target service, and is used to notify the second relay node to assist in finding a first relay node capable of accessing the target service.
  • the first relay node that can access the target service can be understood as that the first relay node supports the target service and can provide other terminals with services related to the target service. In other words, other terminals can pass through the first relay node.
  • the relay node communicates with the network for targeted traffic.
  • the target service is, for example, an Internet (Internet) service.
  • the service identifier of the target service is unique, that is, the service identifiers of different services are different.
  • the second relay node may receive the first message from the remote terminal or the first relay node. After the remote terminal determines the target service to be executed, it can send out a first message carrying the service identifier of the target service to notify the second relay node receiving the first message to assist the remote terminal in finding the first message that can access the target service. a relay node. Or, after the first relay node determines the target service that it can access, it can broadcast the first message carrying the service identifier of the target service to the outside. In this way, for the second relay node, if there is a remote terminal, then the first relay node that provides services for the remote terminal can be quickly determined through the first message broadcast by the second relay node.
  • the second relay node broadcasts the first message.
  • the second relay node broadcasts the first message through the direct communication interface to expand the propagation range of the first message, so that when the distance between the remote terminal and the first relay node is relatively long, the It can assist in finding the first relay node that can access the target service.
  • the second relay node broadcasts the first message so that the first relay node or other second relay nodes receive the first message. If the first relay node receives the first message, the first relay node determines whether to respond to the first message according to whether it can access the target service. If the first relay node can access the target service, it responds to the first message, thereby completing the discovery of the first relay node. If other second relay nodes receive the first message, the other second relay node can continue to broadcast the first message to the outside, so that further first relay nodes can receive the first message and expand the first relay node. Discovery range of successor nodes.
  • the second relay node may determine whether there is a remote terminal that needs to perform the target service, and if it is determined that there is, send a message to the remote terminal through the direct communication interface, The message informs the remote terminal to discover the first relay node that provides communication services for it, and broadcasts the first information from the first relay node to other second relay nodes, so as to be further
  • the remote terminal of the first relay node discovers the first relay node, and expands the discovery range of the first relay node; if it is determined that it does not exist, the first information from the first relay node is transmitted to other second relay nodes by broadcasting node, so that the first relay node can be discovered by a farther remote terminal, and the discovery range of the first relay node is expanded.
  • the remote terminal in the case that the remote terminal is far away from the first relay node, based on the second relay node and the first message carrying the service identifier, the remote terminal can realize that the remote terminal passes through multiple hops (at least two hops: after one
  • the second relay node is equivalent to two hops, including one hop from the remote terminal to the second relay node and one hop from the second relay node to the first relay node; The number is greater than 2) discovering the first relay node capable of accessing the first service of the remote terminal, expanding the discovery range of the first relay node and expanding the network coverage.
  • the discovery of the first relay node can be realized through two modes: in one mode, the remote terminal announces the service it needs through the first message, and the second relay node assists Actively discover the first relay node that can access the corresponding service; in another way, the first relay node announces the service that it can access through the first message, and with the assistance of the second relay node Discovered by remote terminals that need corresponding services. Therefore, through two different modes, the flexibility of first relay node discovery is improved.
  • FIG. 4 is a schematic flowchart of a first relay node discovery method provided by another embodiment of the present disclosure. As shown in Figure 4, the method of this embodiment may include:
  • the remote terminal determines a first target service.
  • the first target service may be a target service to be executed.
  • the remote terminal is pre-configured with the services allowed to be accessed by the remote terminal, and the remote terminal may determine the first target service among the services allowed to be accessed according to the user's request or according to the default configuration of its own system.
  • how to determine the first target service is not limited.
  • the remote terminal broadcasts a first message carrying the service identifier of the target service and the terminal identifier of the remote terminal.
  • the first message is used to notify the second relay node receiving the first message to assist the remote terminal in finding the first message that can access the target service. a relay node.
  • the terminal identifier of the remote terminal is unique.
  • the terminal identifier of the remote terminal may be an application-layer user identifier of the remote terminal, and the application-layer user identifier of the remote terminal is, for example, a user name registered on an application program of the remote terminal. Therefore, associating the terminal identifier of the remote terminal with the service is beneficial to improving the accuracy of discovering the first relay node for different services and different remote terminals.
  • the remote terminal after determining the first target service, obtains the service identifier of the target service and the terminal identifier of the remote terminal, and generates a first message carrying the service identifier of the target service and the terminal identifier of the remote terminal.
  • the first message is broadcast through the direct communication interface to announce to the outside that the remote terminal needs to perform the target service by broadcasting the first message, and especially notifies the second relay node that has received the first message to assist the remote terminal in finding that it can access The first relay node of the target service.
  • the second relay node that has received the first message broadcasts the first message.
  • the second relay node after receiving the first message, the second relay node obtains the service identifier of the target service and the terminal identifier of the remote terminal from the first message, and learns that the remote terminal is to execute the target service.
  • the second relay node broadcasts the first message through the direct communication interface, so that other second relay nodes that are far away from the remote terminal can receive the first message , especially to facilitate the first relay node far away from the remote terminal to receive the first message.
  • the first message received by the second relay node may be the first message broadcast by the remote terminal, or may be the first message from the remote terminal broadcast by other second relay nodes.
  • the first message broadcast by the second relay node also carries the node identifier of the second relay node. Therefore, the terminal identifier of the remote terminal carried in the first message and the node identifiers of one or more second relay nodes can be used to determine the second relay node that the remote terminal passes through in the process of discovering the first relay node through multiple hops. In short, the successor node is convenient to determine the path of the multi-hop process through these identification information.
  • the relevant information of the first relay node can be returned to the remote terminal one by one according to the path formed by these identification information, which is convenient to follow the path formed by these identification information.
  • the path establishes communication between the remote terminal and the first relay node capable of accessing the target service.
  • the node identifier of the second relay node adopts the application layer user identifier of the second relay node.
  • this embodiment further includes:
  • the second relay node receives a response message returned by the first relay node capable of accessing the target service, and the response message is used to instruct the second relay node to assist in notifying the remote terminal that the first relay capable of accessing the target service has been found node.
  • the response message returned by the first relay node carries the service identifier of the target service and the node identifier of the first relay node, so that the second relay node can The node identifier of the node, it is known exactly that the first relay node can access the target service.
  • the first relay node after receiving the first message broadcast by the second relay node, acquires the service identifier of the target service and the node identifier of the second relay node from the first message. According to the service identifier of the target service, the first relay node determines whether the services allowed to be accessed by itself include the target service. If the services allowed to be accessed by the first relay node include the target service (that is, if the first relay node can access the target service), the first relay node sends the second relay node The relay node returns a response message, otherwise it does not respond to the first message.
  • the second relay node sends a response message to the remote terminal.
  • the response message sent by the second relay node to the remote terminal carries the service identifier of the target service, the node identifier of the first relay node and the node identifier of the second relay node, so that the remote terminal can determine
  • the target service that the first relay node can access is specifically which service to be executed by itself, and it is also convenient for subsequent establishment of remote terminals, second relay nodes based on the node identifier of the first relay node and the node identifier of the second relay node.
  • the second relay node can obtain the service identifier of the target service and the node identifier of the first relay node from the response message, and obtain that the first relay node can access the target service. Then, the second relay node adds its own node identifier in the response message, or regenerates a new Respond to the message. Next, the second relay node determines the path through which the first message is transmitted to the second relay node according to the service identifier of the target service, and sends a response message to the remote terminal according to the path. Wherein, the second relay node sends the response message to the remote terminal. It may be that the second relay node directly sends the response message to the remote terminal, or it may be that the second relay node transmits the first message to the last first message on the path experienced by the first message transmission. The second relay node sends a response message.
  • this embodiment provides one of the modes that can be adopted by the first relay node discovery process.
  • the remote terminal to execute the target service broadcasts the first message, and the second relay node that receives the first message then broadcasts the first message. Broadcasting the first message, ... until the first relay node capable of accessing the target service receives the first message.
  • the remote terminal uses the second relay node to actively discover the first relay node through multiple hops, and can discover the first relay node farther away from the remote terminal itself, effectively expanding the discovery of the first relay node range, expanding the network coverage.
  • FIG. 5 is a schematic flowchart of a first relay node discovery method provided by another embodiment of the present disclosure. As shown in Figure 5, the method of this embodiment may include:
  • the first relay node determines a target service that is allowed to be accessed.
  • the first relay node broadcasts a first message carrying the service identifier of the target service and the node identifier of the first relay node, and the first message is used to notify the second relay node receiving the first message to assist the first relay Nodes are discovered by remote terminals to perform target services.
  • one or more target services allowed to be accessed by the first relay node are pre-configured on the first relay node, and the target services allowed to be accessed by the first relay node are the capabilities of the first relay node
  • the first relay node may announce its capability by broadcasting a first message to the outside.
  • the first relay node may obtain the service identifier of the target service and its own node identifier, and generate a first message carrying the service identifier of the target service and its own node identifier.
  • the first message is broadcast to the outside through the direct communication interface, so that the second relay node closer to the remote terminal than the first relay node receives the first message, and then the second relay node continues to broadcast the first message.
  • the node identifier of the first relay node is an application layer user identifier of the first relay node.
  • the second relay node that has received the first message broadcasts the first message.
  • the second relay node after receiving the first message, the second relay node obtains the service identifier of the target service and the terminal identifier of the first relay node from the first message, and knows that the first relay node can access the target service .
  • the second relay node broadcasts the first message through the direct communication interface, so that other second relay nodes closer to the remote terminal can receive the first message, In particular, it is convenient for the remote terminal to receive the first message.
  • the first message received by the second relay node may be the first message broadcast by the first relay node, or may be the first message from the first relay node broadcast by other second relay nodes.
  • the first message broadcast by the second relay node also carries the node identifier of the second relay node. Therefore, the terminal identifier of the first relay node and the node identifiers of one or more second relay nodes carried in the first message can be used to determine the process of the first relay node being discovered by the remote terminal through multiple hops.
  • the second relay node facilitates determining the path of the multi-hop process through these identification information.
  • the remote terminal to execute the target service can establish communication between the remote terminal and the first relay node according to the path formed by the identification information.
  • this embodiment further includes:
  • the second relay node receives the connection request message returned by the remote terminal, and the connection request response message is used to instruct the second relay node to assist in notifying the remote terminal to connect to the first relay node that can access the target service.
  • the remote terminal after receiving the first message broadcast by the second relay node, the remote terminal obtains the service identifier of the target service from the first message, and according to the service identifier of the target service, the remote terminal determines whether the target service is a performed business. If the target service is the service to be executed by the remote terminal, the remote terminal returns a connection request message to the second relay node according to the node identifier of the second relay node in the first message, indicating that the remote terminal chooses to communicate with the second relay node.
  • the nodes are connected to realize communication with the first relay node.
  • the target service is not the service to be executed by the remote terminal, the first message will not be responded.
  • connection request message In response to the connection request message, establish communication between the remote terminal and the first relay node based on the second relay node.
  • the second relay node after receiving the first message from the remote terminal, the second relay node establishes a connection with the remote terminal, and establishes a connection with other second relay nodes or the first relay node based on the path experienced during the transmission of the first message. Nodes are connected, so that the remote terminal communicates with the first relay node through one or more second relay nodes.
  • no limitation is imposed on the specific connection establishment process.
  • this embodiment provides another mode that can be adopted by the first relay node discovery process.
  • the first relay node that can access the target service announces that it can access the target service by broadcasting a first message.
  • the second relay node receiving the first message broadcasts the first message again, ... until the remote terminal to execute the target service receives the first message.
  • the first relay node is discovered by the first relay node through multiple hops with the help of the second relay node, which helps the remote terminal to discover the first relay node that is far away from itself, effectively expanding the first relay node.
  • the discovery range of relay nodes expands the network coverage.
  • the first message also carries indication information indicating whether the target service is allowed to be accessed through a relay.
  • the first message also carries whether the target service is The indication information of the service that is allowed to be accessed through the relay mode, or in other words, the first message also carries the execution information of whether the target service is allowed to be relayed.
  • the process of broadcasting the first message includes: according to the first message, determining whether the target service is allowed to be accessed through a relay; if the target service is allowed to be accessed through a relay , broadcast the first message.
  • the second relay node obtains the indication information indicating whether the target service is allowed to be accessed through the relay mode from the first message. If the indication information indicates that the target service is allowed to be accessed through the relay mode, it means that the remote terminal can The target service is executed in a way that the relay node communicates with the network, and the second relay node broadcasts the first message through the direct communication interface. If the indication information indicates that the target service is not allowed to be accessed through the relay mode, it means that the remote terminal cannot perform the target service by communicating with the network through the relay node, and the second relay node does not broadcast the first message. Sometimes the remote terminal needs to be directly connected to the network to execute the target service. Therefore, the services that are not allowed to be accessed through the relay mode are screened, and the accuracy of the second relay node continuing to broadcast the first message is improved.
  • the first message also carries the remaining number of hops that the target service is allowed to access through relay.
  • the remaining hop count carried in the first message that is, the maximum hop count allowed for the target service to be accessed through the relay mode, is broadcast on the second relay node
  • the remaining hop count carried in the first message is the remaining hop count after subtracting the already performed hop count from the maximum hop count.
  • the maximum number of hops for carrying the target service in the first message broadcast by the remote terminal is 10.
  • the target service in the first message is allowed to pass through.
  • the remaining hops for relay access are 9.
  • the broadcast of the first message by the second relay node further includes: the second relay node The node determines whether the remaining number of hops allowed by the relay mode of the target service is greater than or equal to 1; if the remaining number of hops allowed by the target service to be accessed by the relay mode is greater than or equal to 1, the second relay node updates the remaining number of hops, and The first message is broadcasted, and the broadcasted first message carries the updated remaining hop count.
  • the second relay node obtains the remaining number of hops allowed by the relay access of the target service from the received first message, and if the remaining number of hops is greater than or equal to 1, it indicates the access process of the target service More relay nodes can also be accommodated, so the second relay node broadcasts the first message through the direct communication interface, otherwise the second relay node does not broadcast the first message. Therefore, the first message that does not meet the allowed hop count is screened to prevent the second relay node from forwarding the first message infinitely.
  • the second relay node is pre-configured with services that the second relay node is allowed to access.
  • the process of the second relay node broadcasting the first message further includes: the second relay node determines whether the service allowed to be accessed by itself includes the target service; if the service allowed to be accessed by the second relay node includes the target service, then The second relay node broadcasts the first message.
  • the second relay node can determine whether the target service is in the services allowed by the second relay node according to the service identifier of the target service carried in the first message, and if so, it indicates that the second relay node The node can access the target service, and the second relay node broadcasts the first message; otherwise, the second relay node does not broadcast the first message. Therefore, by pre-configuring the services that are allowed to be accessed for the second relay node, the second relay node only relays the services that it can access, which reduces the burden on the second relay node and improves the efficiency of the second relay node. management effect.
  • the above screening conditions may be combined with each other. For example, if the target service is allowed to be accessed through a relay and the target service is a service that is allowed to be accessed by the second relay node, the second relay node broadcasts the first message; for another example, if the target service is allowed to be accessed through a relay and the remaining hops allowed by the target service to be accessed through the relay mode are greater than or equal to 1 and the target service is a service allowed to be accessed by the second relay node, then the second relay node broadcasts the first message.
  • the network device may pre-configure policy parameters of the first relay node for the first relay node.
  • the method for discovering the first relay node further includes: the first relay node obtains the policy parameters of the first relay node from the network device, and the policy parameters include at least one of the following: the service that the first relay node is allowed to access . Whether the service allowed to be accessed by the first relay node is allowed to be accessed through a relay mode, and the maximum number of hops allowed to be accessed through a relay mode for the service allowed to be accessed by the first relay node. Therefore, the management effect on the first relay node and the services allowed to be accessed by the first relay node is improved, and when the first relay node broadcasts the first message, it can generate the first message according to the policy parameters.
  • the first relay node obtains the policy parameters of the first relay node from the network device, which may be that the first relay node actively requests the network device to configure the policy parameters, or the network device actively configures the policy for the first relay node parameter. For example, when the first relay node is turned on, the first relay node actively requests the network device to configure policy parameters; Follower node configuration policy parameters.
  • the network device includes a policy control function (Policy Control Function, PCF), and the policy parameters can be configured for the first relay node through the PCF.
  • PCF Policy Control Function
  • the first relay node acquires the policy parameters of the first relay node from the network device, including: the first relay node sends a second message to the PCF, the second message is used to request the policy parameters from the PCF, and the second message Indicating the capability of the first relay node; the first relay node receives the policy parameters configured by the PCF for the first relay node.
  • PCF Policy Control Function
  • the second message indicates the capability of the first relay node, that is, the second message indicates that the first relay node is a terminal-to-network relay node, that is, indicates the role or function assumed by the first relay node, so that the PCF
  • the policy parameter can be accurately configured for the first relay node according to the capability of the first relay node.
  • the network device may pre-configure policy parameters of the second relay node for the second relay node.
  • the method for discovering the first relay node further includes: the second relay node obtains the policy parameters of the second relay node from the network device, and the policy parameters include at least one of the following: the services that the second relay node is allowed to access . Therefore, the management effect on the second relay node and the services allowed to be accessed by the second relay node is improved.
  • the second relay node broadcasts the first message, it can determine whether to broadcast the first message according to the policy parameters. Specifically, it can be Reference is made to the aforementioned relevant content, and details are not repeated here.
  • the second relay node acquires the policy parameters of the second relay node from the network device, which may be that the second relay node actively requests configuration policy parameters from the network device, or that the network device actively configures the policy for the second relay node parameter. For example, when the second relay node is powered on, the second relay node actively requests configuration policy parameters from the network device; Follower node configuration policy parameters.
  • the network device includes a policy control function (Policy Control Function, PCF), and the policy parameters can be configured for the second relay node through the PCF.
  • PCF Policy Control Function
  • the second relay node obtains the policy parameters of the second relay node from the network device, including: the second relay node sends a second message to the PCF, the second message is used to request the policy parameters from the PCF, and the second message Indicating the capability of the second relay node; the second relay node receives the policy parameters configured by the PCF for the second relay node.
  • PCF Policy Control Function
  • the second message indicates the capability of the second relay node, that is, the second message indicates that the second relay node is a terminal-to-device relay node, that is, indicates the role or function assumed by the second relay node, so that the PCF
  • the policy parameter can be accurately configured for the second relay node according to the capability of the second relay node.
  • the network device may pre-configure policy parameters of the remote terminal for the remote terminal.
  • the first relay node discovery method further includes: the remote terminal acquires policy parameters of the remote terminal from the network device, and the policy parameters include at least one of the following: services that the remote terminal is allowed to access, whether the services that the remote terminal is allowed to access The maximum number of hops allowed to be accessed through a relay for services that are allowed to be accessed through a relay and that are allowed to be accessed by a remote terminal. Therefore, the management effect on the remote terminal and the services that the remote terminal is allowed to access is improved, and when the remote terminal broadcasts the first message, it can generate the first message according to the policy parameters.
  • the remote terminal obtains the policy parameters of the remote terminal from the network device, which may be that the remote terminal actively requests configuration of the policy parameters from the network device, or may be that the network device actively configures the policy parameters for the remote terminal. For example, when the remote terminal is turned on, the remote terminal actively requests configuration of policy parameters from the network device; another example, when the communication between the network device and the remote terminal is successfully established, the network device actively configures policy parameters to the remote terminal.
  • the network device includes a policy control function (Policy Control Function, PCF), which can configure policy parameters for the remote terminal through the PCF.
  • PCF Policy Control Function
  • the remote terminal acquires the policy parameters of the second relay node from the network device, including: the remote terminal sends a second message to the PCF, the second message is used to request the policy parameters from the PCF, and the second message indicates the capability of the remote terminal ;
  • the remote terminal receives the policy parameters configured by the PCF for the remote terminal.
  • the second message indicates the capability of the remote terminal, that is, the second message indicates that the terminal sending the second message is a remote terminal, so that the PCF can accurately configure policy parameters for the remote terminal.
  • FIG. 6 is a schematic flowchart of a network device configuring policy parameters for a terminal (the terminal may be a first relay node, a second relay node, or a remote terminal) provided by an embodiment of the present disclosure.
  • the policy parameter configuration process includes:
  • the terminal sends a second message to the access and mobility management function (Access and Mobility Management Function, AMF) in the network device, where the second message is used to request policy parameters from the PCF, and the second message indicates the capability of the terminal.
  • AMF Access and Mobility Management Function
  • the terminal sends a second message to the AMF.
  • the second message is a registration request (Registration Request) message, which is used to request the PCF to provide ProSe policy parameters, and the second message indicates that the terminal is in the ProSe Capabilities in the service, for example, the second message indicates that the terminal supports the remote terminal, supports the first relay node, or supports the second relay node that provides connections for the first relay node in the ProSe service.
  • Registration Request Registration Request
  • the AMF returns a response message of the second message to the terminal.
  • the response message is used to notify the terminal that the AMF has received the second message.
  • the AMF returns a registration accepted (Registration Accept) message to the terminal after completing the registration process.
  • the AMF sends a third message to the PCF, so as to request the PCF to configure the policy parameters of the terminal.
  • the third message is used to request the PCF to configure the policy parameters of the terminal, and the third message indicates the capabilities of the terminal, so that the PCF configures policy parameters for the terminal according to the capabilities of the terminal.
  • the PCF returns a response message to the third message to the AMF.
  • the response message is used that the AMF PCF has received the third message.
  • the PCF sends the policy parameter to the AMF.
  • the policy parameters provided by the PCF are different according to the capabilities of the terminals. For details, refer to the policy parameters of the first relay node, the policy parameters of the second relay node, and the policy parameters of the remote terminal in the foregoing embodiments. This will not be repeated here.
  • the AMF returns a fourth message to the terminal, where the fourth message carries policy parameters of the terminal.
  • the fourth message may be a Non-Access-Stratum (Non-Access-Stratum, NAS) message.
  • Non-Access-Stratum Non-Access-Stratum, NAS
  • the terminal returns a policy parameter delivery result to the AMF.
  • the policy parameter delivery result is used to notify the AMF terminal whether to successfully receive the policy parameter.
  • the AMF returns a policy parameter delivery result to the PCF.
  • the policy parameter distribution result is used to notify the PCF terminal whether to successfully receive the policy parameters
  • corresponding policy parameters are configured for the first relay node, the second relay node, and the remote terminal, so that the first relay node, the second relay node, and the remote terminal
  • the terminal Based on their respective policy parameters, the terminal performs the first relay node discovery process in any of the foregoing embodiments, so that the remote terminal discovers the first relay node through multiple hops.
  • an embodiment of the present disclosure provides a first relay node discovery apparatus, and the first relay node discovery apparatus in this embodiment may be a second relay node.
  • the apparatus for discovering a first relay node may include a transceiver 701 , a processor 702 and a memory 703 .
  • the transceiver 701 is configured to receive and send data under the control of the processor 702 .
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 702 and various circuits of the memory represented by the memory 703 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.
  • Transceiver 701 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, fiber optic cables, etc. Transmission medium.
  • the first relay node discovery apparatus may also include a user interface 704.
  • the user interface 704 may also be an interface capable of connecting externally and internally to required devices.
  • the connected devices include but not Limited to keypads, displays, speakers, microphones, joysticks, etc.
  • the processor 702 is responsible for managing the bus architecture and general processing, and the memory 703 can store data used by the processor 702 when performing operations.
  • the processor 702 may be a 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 a complex programmable logic device (Complex Programmable Logic Device, CPLD), the processor 702 may 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 702 is configured to execute any method related to the second relay node provided in the embodiments of the present disclosure according to the obtained executable instruction by calling the computer program stored in the memory 703 .
  • the processor and memory may also be physically separated.
  • the processor 702 is configured to perform the following operations: receive the first message, where the first message carries the service identifier of the target service, and the first message is used to notify the second relay node to assist in finding the first relay node that can access the target service. Successor node; broadcasts first message.
  • the first message is used to notify the second relay node to assist the remote terminal to perform the target service to find the first relay node that can access the target service; the processor 702 also performs the following operations: receiving The first message broadcast by the remote terminal; or, receiving the first message from the remote terminal broadcast by another second relay node; wherein, the first message also carries the terminal identifier of the remote terminal.
  • the first message is used to notify the second relay node to assist the first relay node capable of accessing the target service to be discovered by the remote terminal to perform the target service; the processor 702 also performs the following operations: receiving the first message broadcast by the first relay node; or receiving the first message from the first relay node broadcast by other second relay nodes; wherein, the first message also carries the node identifier of the first relay node .
  • the first message also carries indication information indicating whether the target service is allowed to be accessed through a relay; the processor 702 also performs the following operations: according to the first message, determine whether the target service is allowed to be accessed through a relay access via relay mode; if the target service allows access through relay mode, broadcast the first message.
  • the first message also carries the remaining hops of the target service accessed through the relay; the processor 702 also performs the following operation: determine whether the remaining hops of the target service accessed through the relay greater than or equal to 1; if the remaining hop count is greater than or equal to 1, update the remaining hop count and broadcast a first message, wherein the broadcasted first message carries the updated remaining hop count.
  • the processor 702 also performs the following operations: if the target service is allowed to be accessed through a relay, determine whether the target service is included in the services allowed to be accessed; if the target service is included, broadcast the first information.
  • the processor 702 further performs the following operation: acquire policy parameters of the second relay node from the network device, where the policy parameters include service identifiers of services allowed to be accessed by the second relay node.
  • the network device includes a policy control function PCF
  • the processor 702 further performs the following operations: sending a second message to the PCF, where the second message is used to request a policy parameter from the PCF, and the second message indicates that the second Capabilities of the relay node; receiving policy parameters configured by the PCF for the second relay node.
  • the processor 702 also performs the following operation: receive a response message returned by the first relay node, where the response message is used to instruct the second relay node to assist in notifying the remote terminal that it has found that the target service can be accessed The first relay node; sending a response message to the remote terminal.
  • the processor 702 also performs the following operations: receive a connection request message returned by the remote terminal, where the connection request message is used to instruct the second relay node to assist the remote terminal to connect to the first relay node that can access the target service; A relay node; establishing communication between the remote terminal and the first relay node based on the second relay node in response to the connection request message.
  • an embodiment of the present disclosure provides an apparatus for discovering a first relay node, and the apparatus for discovering a first relay node in this embodiment may be a remote terminal.
  • the apparatus for discovering a first relay node may include a transceiver 801 , a processor 802 and a memory 803 .
  • the transceiver 801 is used for receiving and sending data under the control of the 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.
  • 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, fiber optic cables, etc. Transmission medium.
  • the first relay node discovery apparatus may also include a user interface 804.
  • the user interface 804 may also be an interface capable of connecting externally and internally to required equipment.
  • the connected equipment includes but not Limited to keypads, displays, speakers, microphones, joysticks, etc.
  • 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 (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 method related to the remote terminal provided by the embodiments of the present disclosure according to the obtained executable instruction by calling the computer program stored in the memory 803 .
  • the processor and memory may also be physically separated.
  • the processor 802 is configured to perform the following operations: determine the first target service; broadcast a first message carrying the service identifier of the target service and the terminal identifier of the remote terminal, and the first message is used to notify the second
  • the relay node assists the remote terminal in finding the first relay node capable of accessing the target service.
  • the processor 802 also performs the following operations: obtain the policy parameters of the remote terminal from the network device, and the policy parameters include at least one of the following: services that the remote terminal is allowed to access, services that the remote terminal is allowed to access Whether the service is allowed to be accessed through the relay mode, and the maximum number of hops allowed to be accessed through the relay mode for the business that the remote terminal is allowed to access.
  • the above-mentioned device provided by the present disclosure can implement all the method steps implemented by the remote terminal in the above-mentioned method embodiment, and can achieve the same technical effect.
  • the same parts and beneficial effects are described in detail.
  • an embodiment of the present disclosure provides an apparatus for discovering a first relay node, and the apparatus for discovering a first relay node in this embodiment may be a first relay node.
  • the apparatus for discovering a first relay node may include a transceiver 901 , a processor 902 and a memory 903 .
  • the transceiver 901 is used for receiving and sending data under the control of the 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.
  • 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, fiber optic cables, etc. Transmission medium.
  • the first relay node discovery apparatus may also include a user interface 904.
  • the user interface 904 may also be an interface capable of connecting externally and internally to required equipment.
  • the connected equipment includes but not Limited to keypads, displays, speakers, microphones, joysticks, etc.
  • 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 (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Complex Programmable Logic Device, CPLD), the processor 902 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 method related to the first relay node provided in the embodiments of the present disclosure according to the obtained executable instruction by calling the computer program stored in the memory 903 .
  • the processor and memory may also be physically separated.
  • the processor 902 is configured to perform the following operations: determine the target service allowed to be accessed by the first relay node; broadcast a first message carrying the service identifier of the target service and the node identifier of the first relay node, and the first message uses The second relay node notifying the receipt of the first message assists the first relay node to be discovered by the remote terminal to execute the target service.
  • the processor 902 also performs the following operation: acquire the policy parameters of the first relay node from the network device, and the policy parameters include at least one of the following: services allowed to be accessed by the first relay node, Whether the service allowed to be accessed by the relay node is allowed to be accessed through the relay mode, and the maximum number of hops allowed to be accessed through the relay mode for the service allowed to be accessed by the first relay node.
  • the above-mentioned device provided by the present disclosure can implement all the method steps implemented by the first relay node in the above-mentioned method embodiment, and can achieve the same technical effect.
  • the same parts and beneficial effects of the method embodiments are described in detail.
  • an embodiment of the present disclosure further provides a first relay node discovery apparatus, and the first relay node discovery apparatus in this embodiment may be a second relay node.
  • the apparatus for discovering a first relay node includes: a receiving unit 1001 and a sending unit 1002 .
  • the receiving unit 1001 is configured to receive a first message, the first message carries a service identifier of a target service, and the first message is used to notify a second relay node to assist in finding a first relay node capable of accessing the target service.
  • the sending unit 1002 is configured to broadcast the first message.
  • the first message is used to notify the second relay node to assist the remote terminal to perform the target service to find the first relay node that can access the target service;
  • the receiving unit 1001 is specifically configured to: receive the remote The first message broadcast by the terminal; or, receiving the first message from the remote terminal broadcast by another second relay node; wherein, the first message also carries the terminal identifier of the remote terminal.
  • the first message is used to notify the second relay node to assist the first relay node capable of accessing the target service to be discovered by the remote terminal to perform the target service;
  • the receiving unit 1001 is specifically configured to: receive The first message broadcast by the first relay node; or, receiving the first message from the first relay node broadcast by another second relay node; wherein, the first message also carries the node identifier of the first relay node.
  • the first message also carries indication information indicating whether the target service is allowed to be accessed through a relay; the sending unit 1002 is specifically configured to: determine whether the target service is allowed to be accessed through a relay according to the first message Access; if the target service is allowed to access through relay, then broadcast the first message.
  • the first message also carries the remaining hops of the target service through relay access; the sending unit 1002 is specifically configured to: determine whether the remaining hops of the target service through relay access are greater than or equal to 1; if the remaining hop count is greater than or equal to 1, update the remaining hop count and broadcast a first message, wherein the broadcasted first message carries the updated remaining hop count.
  • the sending unit 1002 is specifically configured to: if the target service is allowed to be accessed through relay, determine whether the target service is included in the services allowed to be accessed; if the target service is included, broadcast the first message .
  • the apparatus for discovering the first relay node further includes: a configuration unit 1003, configured to acquire the policy parameters of the second relay node from the network device, the policy parameters include the access parameters of the second relay node The business identity of the business.
  • the network device includes a policy control function PCF
  • the configuration unit 1003 is specifically configured to: send a second message to the PCF, the second message is used to request a policy parameter from the PCF, and the second message indicates that the second Capabilities of the relay node; receiving policy parameters configured by the PCF for the second relay node.
  • the receiving unit 1001 is further configured to: receive a response message returned by the first relay node, the response message is used to instruct the second relay node to assist in notifying the remote terminal that the first relay node that can access the target service has been found.
  • a relay node sending a response message to the remote terminal.
  • the receiving unit 1001 is further configured to: receive a connection request message returned by the remote terminal, where the connection request message is used to instruct the second relay node to assist the remote terminal to connect to the first relay that can access the target service A node; establishing communication between the remote terminal and the first relay node based on the second relay node in response to the connection request message.
  • the embodiment of the present disclosure further provides a device for discovering a first relay node, and the device for discovering a first relay node in this embodiment may be a remote terminal.
  • the apparatus for discovering a first relay node includes: a determining unit 1101 and a sending unit 1102 .
  • a determining unit 1101, configured to determine a first target service.
  • the sending unit 1102 is configured to broadcast a first message carrying the service identifier of the target service and the terminal identifier of the remote terminal, and the first message is used to notify the second relay node receiving the first message to assist the remote terminal in finding that the target service can be accessed The first relay node of .
  • the apparatus for discovering the first relay node further includes: a configuration unit 1103, configured to acquire policy parameters of the remote terminal from the network device, where the policy parameters include at least one of the following: services that the remote terminal is allowed to access , Whether the service that the remote terminal is allowed to access is allowed to be accessed through the relay mode, and the maximum number of hops that the remote terminal is allowed to access through the relay mode.
  • the above-mentioned device provided by the present disclosure can implement all the method steps implemented by the remote terminal in the above-mentioned method embodiment, and can achieve the same technical effect.
  • the same parts and beneficial effects are described in detail.
  • an embodiment of the present disclosure further provides an apparatus for discovering a first relay node, and the apparatus for discovering a first relay node in this embodiment may be a first relay node.
  • the apparatus for discovering a first relay node includes: a determining unit 1201 and a sending unit 1202 .
  • the determining unit 1201 is configured to determine a target service allowed to be accessed by the first relay node.
  • the sending unit 1202 is configured to broadcast a first message carrying the service identifier of the target service and the node identifier of the first relay node, and the first message is used to notify the second relay node receiving the first message to assist the first relay node Discovered by the remote terminal to execute the target service.
  • the apparatus for discovering the first relay node further includes: a configuration unit 1203, configured to acquire policy parameters of the first relay node from the network device, and the policy parameters include at least one of the following: the first relay node The services allowed to be accessed by the node, whether the services allowed to be accessed by the first relay node are allowed to be accessed through the relay mode, and the maximum number of hops allowed to be accessed through the relay mode for the services allowed to be accessed by the first relay node.
  • the above-mentioned device provided by the present disclosure can implement all the method steps implemented by the first relay node in the above-mentioned method embodiment, and can achieve the same technical effect.
  • the same parts and beneficial effects of the method embodiments 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.
  • An integrated unit may be stored in a processor-readable storage medium if it is realized in the form of a software function unit and sold or used as an independent product.
  • 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 execute the related second relay node, Any method of the remote terminal or the first relay node.
  • the processor can implement all the method steps implemented by the terminal in the above method embodiment, and can achieve the same technical effect, and 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 can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (e.g., floppy disk, hard disk, tape, magneto-optical disk (MO), etc.), optical storage (e.g., 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 e.g., floppy disk, hard disk, tape, magneto-optical disk (MO), etc.
  • optical storage e.g., CD, DVD, BD, HVD, etc.
  • semiconductor memory such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)
  • 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.
  • 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 realizes the functions specified in one or more procedures of the flow chart and/or one or more blocks of 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 implementing the functions specified in the procedure or procedures of the flowchart and/or the block or blocks of the block diagrams.

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Abstract

本公开提供一种第一中继节点发现方法、装置及存储介质，在第二中继节点一侧，该方法包括：接收第一消息，第一消息中携带目标业务标识；广播第一消息。其中，第一消息用于通知第二中继节点协助发现能够接入目标业务的第一中继节点。从而，基于第二中继节点，远程终端能够通过多跳的方式发现距离较远的第一中继节点，解决了远程终端在与第一中继节点之间的距离较远而导致远程终端难以发现第一中继节点的问题。

Description

第一中继节点发现方法、装置及存储介质
本公开要求于2021年09月03日提交中国专利局、申请号为202111034540.8、申请名称为“第一中继节点发现方法、装置及存储介质”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
本公开涉及通信领域，尤其涉及一种第一中继节点发现方法、装置及存储介质。
背景技术
在第三代合作伙伴计划(3rd Generation Partnership Project，3GPP)的标准协议中，对5G系统中的临近业务(Proximity Services，ProSe)进行了研究和标准化。其中，ProSe中的重要场景之一为：远程终端(Remote UE)通过终端到网络的中继节点(UE-to-Network Relay)(以下统称第一中继节点)，与网络进行通信以获取相关的网络服务。
远程终端通过第一中继节点与网络设备进行通信以获取相关的网络服务之前，需要先通过发现过程发现第一中继节点，再与之建立连接。然而，第一中继节点的发现过程，受限于远程终端与第一中继节点之间的距离，当远程终端与第一中继节点之间的距离较远时，远程终端难以发现第一中继节点。
发明内容
本公开提供一种第一中继节点发现方法、装置及存储介质，用于解决远程终端难以发现距离较远的终端到网络的中继节点的问题。
第一方面，本公开提供一种第一中继节点发现方法，应用于第二中继节点，第一中继节点发现方法包括：接收第一消息，第一消息中携带目标业务的业务标识，第一消息用于通知第二中继节点协助发现能够接入目标业务的第一中继节点；广播第一消息。
在一些可选的实施方式中，第一消息用于通知第二中继节点协助待执行目标业务的远程终端发现能够接入目标业务的第一中继节点；接收第一消息，包括：接收远程终端广播的第一消息；或者，接收其他第二中继节点广播的来自远程终端的第一消息；其中，第一消息中还携带远程终端的终端标识。
在一些可选的实施方式中，第一消息用于通知第二中继节点协助能够接入目标业务的第一中继节点被待执行目标业务的远程终端发现；接收第一消息，包括：接收第一中继节点广播的第一消息；或者，接收其他第二中继节点广播的来自第一中继节点的第一消息；其中，第一消息中还携带第一中继节点的节点标识。
在一些可选的实施方式中，第一消息中还携带目标业务是否允许通过中继方式接入的 指示信息；广播第一消息，包括：根据第一消息，确定目标业务是否允许通过中继方式接入；如果目标业务允许通过中继方式接入，则广播第一消息。
在一些可选的实施方式中，第一消息中还携带目标业务允许通过中继方式接入的剩余跳数；如果目标业务允许通过中继方式接入，则广播第一消息，包括：确定目标业务允许通过中继方式接入的剩余跳数是否大于或等于1；如果剩余跳数大于或等于1，则更新剩余跳数，并广播第一消息，其中，广播的第一消息中携带更新后的剩余跳数。
在一些可选的实施方式中，如果目标业务允许通过中继方式接入，则广播第一消息，包括：如果目标业务允许通过中继方式接入，则确定允许接入的业务中是否包括目标业务；如果包括目标业务，则广播第一消息。
在一些可选的实施方式中，接收第一消息之前，还包括：从网络设备获取第二中继节点的策略参数，策略参数包括第二中继节点允许接入的业务的业务标识。
在一些可选的实施方式中，网络设备包括策略控制功能PCF，从网络设备获取第二中继节点的策略参数，包括：向PCF发送第二消息，第二消息用于向PCF请求策略参数，且第二消息指示第二中继节点的能力；接收PCF为第二中继节点配置的策略参数。
在一些可选的实施方式中，广播第一消息之后，还包括：接收第一中继节点返回的响应消息，响应消息用于指示第二中继节点协助通知远程终端已发现能够接入目标业务的第一中继节点；向远程终端发送响应消息。
在一些可选的实施方式中，广播第一消息之后，还包括：接收远程终端返回的连接请求消息，连接请求消息用于指示第二中继节点协助远程终端连接能够接入目标业务的第一中继节点；响应于连接请求消息，基于第二中继节点建立远程终端与第一中继节点之间的通信。
第二方面，本公开提供一种第一中继节点发现方法，应用于远程终端，第一中继节点发现方法包括：确定第一目标业务；广播携带目标业务的业务标识和远程终端的终端标识的第一消息，第一消息用于通知接收到第一消息的第二中继节点协助远程终端发现能够接入目标业务的第一中继节点。
在一些可选的实施方式中，广播第一消息之前，还包括：从网络设备获取远程终端的策略参数，策略参数包括如下至少一种：远程终端允许接入的业务、远端终端允许接入的业务是否允许通过中继方式接入、远程终端允许接入的业务允许通过中继方式接入的最大跳数。
第三方面，本公开提供一种第一中继节点发现方法，应用于第一中继节点，第一中继节点发现方法包括：确定第一中继节点允许接入的目标业务；广播携带目标业务的业务标识和第一中继节点的节点标识的第一消息，第一消息用于通知接收到第一消息的第二中继节点协助第一中继节点被待执行目标业务的远程终端发现。
在一些可选的实施方式中，广播第一消息之前，还包括：从网络设备获取第一中继节点的策略参数，策略参数包括如下至少一种：第一中继节点允许接入的业务、第一中继节点允许接入的业务是否允许通过中继方式接入、第一中继节点允许接入的业务允许通过中继方式接入的最大跳数。
第四方面，本公开提供一种第一中继节点发现装置，应用于第二中继节点，第一中继节点发现装置包括存储器、收发机和处理器；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如下操作：接收第一消息，第一消息中携带目标业务的业务标识，第一消息用于通知第二中继节点协助发现能够接入目标业务的第一中继节点；广播第一消息。
在一些可选的实施方式中，第一消息用于通知第二中继节点协助待执行目标业务的远程终端发现能够接入目标业务的第一中继节点；处理器还执行如下操作：接收远程终端广播的第一消息；或者，接收其他第二中继节点广播的来自远程终端的第一消息；其中，第一消息中还携带远程终端的终端标识。
在一些可选的实施方式中，第一消息用于通知第二中继节点协助能够接入目标业务的第一中继节点被待执行目标业务的远程终端发现；处理器还执行如下操作：接收第一中继节点广播的第一消息；或者，接收其他第二中继节点广播的来自第一中继节点的第一消息；其中，第一消息中还携带第一中继节点的节点标识。
在一些可选的实施方式中，第一消息中还携带目标业务是否允许通过中继方式接入的指示信息；处理器还执行如下操作：根据第一消息，确定目标业务是否允许通过中继方式接入；如果目标业务允许通过中继方式接入，则广播第一消息。
在一些可选的实施方式中，第一消息中还携带目标业务允许通过中继方式接入的剩余跳数；处理器还执行如下操作：确定目标业务允许通过中继方式接入的剩余跳数是否大于或等于1；如果剩余跳数大于或等于1，则更新剩余跳数，并广播第一消息，其中，广播的第一消息中携带更新后的剩余跳数。
在一些可选的实施方式中，处理器还执行如下操作：如果目标业务允许通过中继方式接入，则确定允许接入的业务中是否包括目标业务；如果包括目标业务，则广播第一消息。
在一些可选的实施方式中，处理器还执行如下操作：从网络设备获取第二中继节点的策略参数，策略参数包括第二中继节点允许接入的业务的业务标识。
在一些可选的实施方式中，网络设备包括策略控制功能PCF，处理器还执行如下操作：向PCF发送第二消息，第二消息用于向PCF请求策略参数，且第二消息指示第二中继节点的能力；接收PCF为第二中继节点配置的策略参数。
在一些可选的实施方式中，处理器还执行如下操作：接收第一中继节点返回的响应消息，响应消息用于指示第二中继节点协助通知远程终端已发现能够接入目标业务的第一中继节点；向远程终端发送响应消息。
在一些可选的实施方式中，处理器还执行如下操作：接收远程终端返回的连接请求消息，连接请求消息用于指示第二中继节点协助远程终端连接能够接入目标业务的第一中继节点；响应于连接请求消息，基于第二中继节点建立远程终端与第一中继节点之间的通信。
第五方面，本公开提供一种第一中继节点发现装置，应用于远程终端，第一中继节点发现装置包括存储器、收发机和处理器：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如下操作：确定第一目标业务；广播携带目标业务的业务标识和远程终端的终端标识的第一消息，第一消息用于通知接收到第一消息的第二中继节点协助远程终端发现能够接入目标业务的第一中继节点。
在一些可选的实施方式中，处理器还执行如下操作：从网络设备获取远程终端的策略参数，策略参数包括如下至少一种：远程终端允许接入的业务、远端终端允许接入的业务 是否允许通过中继方式接入、远程终端允许接入的业务允许通过中继方式接入的最大跳数。
第六方面，本公开提供一种第一中继节点发现装置，应用于第一中继节点，第一中继节点发现装置包括存储器、收发机和处理器；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如下操作：确定第一中继节点允许接入的目标业务；广播携带目标业务的业务标识和第一中继节点的节点标识的第一消息，第一消息用于通知接收到第一消息的第二中继节点协助第一中继节点被待执行目标业务的远程终端发现。
在一些可选的实施方式中，处理器还执行如下操作：从网络设备获取第一中继节点的策略参数，策略参数包括如下至少一种：第一中继节点允许接入的业务、第一中继节点允许接入的业务是否允许通过中继方式接入、第一中继节点允许接入的业务允许通过中继方式接入的最大跳数。
第七方面，本公开提供一种第一中继节点发现装置，应用于第二中继节点，第一中继节点发现装置包括：接收单元，用于接收第一消息，第一消息中携带目标业务的业务标识，第一消息用于通知第二中继节点协助发现能够接入目标业务的第一中继节点；发送单元，用于广播第一消息。
在一些可选的实施方式中，第一消息用于通知第二中继节点协助待执行目标业务的远程终端发现能够接入目标业务的第一中继节点；接收单元具体用于：接收远程终端广播的第一消息；或者，接收其他第二中继节点广播的来自远程终端的第一消息；其中，第一消息中还携带远程终端的终端标识。
在一些可选的实施方式中，第一消息用于通知第二中继节点协助能够接入目标业务的第一中继节点被待执行目标业务的远程终端发现；接收单元具体用于：接收第一中继节点广播的第一消息；或者，接收其他第二中继节点广播的来自第一中继节点的第一消息；其中，第一消息中还携带第一中继节点的节点标识。
在一些可选的实施方式中，第一消息中还携带目标业务是否允许通过中继方式接入的指示信息；发送单元具体用于：根据第一消息，确定目标业务是否允许通过中继方式接入；如果目标业务允许通过中继方式接入，则广播第一消息。
在一些可选的实施方式中，第一消息中还携带目标业务允许通过中继方式接入的剩余跳数；发送单元具体用于：确定目标业务允许通过中继方式接入的剩余跳数是否大于或等于1；如果剩余跳数大于或等于1，则更新剩余跳数，并广播第一消息，其中，广播的第一消息中携带更新后的剩余跳数。
在一些可选的实施方式中，发送单元具体用于：如果目标业务允许通过中继方式接入，则确定允许接入的业务中是否包括目标业务；如果包括目标业务，则广播第一消息。
在一些可选的实施方式中，第一中继节点发现装置还包括：配置单元，用于从网络设备获取第二中继节点的策略参数，策略参数包括第二中继节点允许接入的业务的业务标识。
在一些可选的实施方式中，网络设备包括策略控制功能PCF，配置单元具体用于：向PCF发送第二消息，第二消息用于向PCF请求策略参数，且第二消息指示第二中继节点的能力；接收PCF为第二中继节点配置的策略参数。
在一些可选的实施方式中，接收单元还用于：接收第一中继节点返回的响应消息，响应消息用于指示第二中继节点协助通知远程终端已发现能够接入目标业务的第一中继节 点；向远程终端发送响应消息。
在一些可选的实施方式中，接收单元还用于：接收远程终端返回的连接请求消息，连接请求消息用于指示第二中继节点协助远程终端连接能够接入目标业务的第一中继节点；响应于连接请求消息，基于第二中继节点建立远程终端与第一中继节点之间的通信。
第八方面，本公开提供一种第一中继节点发现装置，应用于远程终端，第一中继节点发现装置包括：确定单元，用于确定第一目标业务；发送单元，用于广播携带目标业务的业务标识和远程终端的终端标识的第一消息，第一消息用于通知接收到第一消息的第二中继节点协助远程终端发现能够接入目标业务的第一中继节点。
在一些可选的实施方式中，第一中继节点发现装置还包括：配置单元，用于从网络设备获取远程终端的策略参数，策略参数包括如下至少一种：远程终端允许接入的业务、远端终端允许接入的业务是否允许通过中继方式接入、远程终端允许接入的业务允许通过中继方式接入的最大跳数。
第九方面，本公开提供一种第一中继节点发现装置，应用于第一中继节点，第一中继节点发现装置包括：确定单元，用于确定第一中继节点允许接入的目标业务；发送单元，用于广播携带目标业务的业务标识和第一中继节点的节点标识的第一消息，第一消息用于通知接收到第一消息的第二中继节点协助第一中继节点被待执行目标业务的远程终端发现。
在一些可选的实施方式中，第一中继节点发现装置还包括：配置单元，用于从网络设备获取第一中继节点的策略参数，策略参数包括如下至少一种：第一中继节点允许接入的业务、第一中继节点允许接入的业务是否允许通过中继方式接入、第一中继节点允许接入的业务允许通过中继方式接入的最大跳数。
第十方面，本公开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第一方面、第二方面或者第三方面的第一中继节点发现方法。
第十一方面，本公开提供一种计算机可读存储介质，计算机可读存储介质存储有计算机程序，计算机程序用于使计算机执行第一方面、第二方面或者第三方面的第一中继节点发现方法。
第十二方面，本公开提供一种包含指令的计算机程序产品，当指令在计算机上运行时，使得计算机执行如上述第一方面、第二方面或者第三方面的第一中继节点发现方法。
第十三方面，本公开提供一种通信系统，包括如上任一的第一中继节点、至少一个如上任一的第二中继节点和如上任一的远程终端。
本公开提供了第一中继节点发现方法、装置及存储介质，在该方法中，第二中继节点接收第一消息后，广播第一消息，其中，第一消息携带目标业务的业务标识，第一消息用于通知第二中继节点协助发现能够接入目标业务的第一中继节点。因此，在第一中继节点的发现过程中，远程终端不是直接发现第一中继节点，而是基于第二中继节点，通过多跳发现第一中继节点，增大了第一中继节点被发现的距离范围，扩大了网络覆盖范围，解决了远程终端在距离第一中继节点较远的情形下难以发现第一中继节点的问题。
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发明的实施例的关键或重要特征，亦非用于限制本发明的范围。本发明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发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为5G系统中ProSe的网络架构示例图；
图2为本公开一实施例提供的应用场景示意图；
图3为本公开一实施例提供的第一中继节点发现方法的流程图；
图4为本公开另一实施例提供的第一中继节点发现方法的流程图；
图5为本公开另一实施例提供的第一中继节点发现方法的流程图；
图6为本公开一实施例提供的网络设备为终端(终端可以为第一中继节点、第二中继节点、远程终端)配置策略参数的流程示意图；
图7为本公开一实施例提供的第一中继节点发现装置的结构示意图；
图8为本公开另一实施例提供的第一中继节点发现装置的结构示意图；
图9为本公开另一实施例提供的第一中继节点发现装置的结构示意图；
图10为本公开另一实施例提供的第一中继节点发现装置的结构示意图；
图11为本公开另一实施例提供的第一中继节点发现装置的结构示意图；
图12为本公开另一实施例提供的第一中继节点发现装置的结构示意图。
具体实施方式
本公开中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A,B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a,b,或c中的至少一项(个)，可以表示：a,b,c,a-b,a-c,b-c,或a-b-c，其中a,b,c可以是单个，也可以是多个。
可以理解的，本公开实施例中的各步骤或操作仅是示例，本公开实施例还可以执行其它操作或者各种操作的变形。此外，各个步骤可以按照本公开实施例呈现的不同的顺序来执行，并且有可能并非要执行本公开实施例中的全部操作。
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。
首先，对本公开中的部分用于进行解释说明，便于本领域技术人员理解：
远程终端(可简称为Relay UE)：因处于网络覆盖范围之外或者蜂窝网通信接口(简称Uu接口，终端与网络之间的通信接口)的信号质量较差等原因而无法直接连接网络的 终端。
终端到网络的中继节点(可简称为UE-to-Network Relay)(以下统称第一中继节点)：具备中继功能的终端，其一侧通过Uu接口注册到网络中，并建立协议数据单元(Protocol Data Unit，PUD)会话和服务质量(Quality of Service，QOS)流以实现自身与网络的通信，另一侧通过直连通信接口(可简称PC5接口，终端与终端之间的通信接口)与远程终端、终端到终端的中继节点进行通信，将远程终端的通信数据转发至网络，达到远程终端与网络进行通信的目的。
终端到终端的中继节点(可简称为UE-to-UE Relay)(以下统称第二中继节点)：具备中继功能的终端，其两侧均通过PC5接口与其他终端进行通信，将一侧终端的通信数据转发至另一侧的终端，以建立不同终端之间通信。
参考图1，图1为5G系统中ProSe的网络架构示例图。远程终端通过PC5接口与第一中继节点进行通信，第一中继节点通过Uu接口将来自远程终端的通信数据转发至5G网络，实现远程终端与网络的通信。其中，远程终端与第一中继节点进行通信之前，需先进行第一中继节点的发现。
在第一中继节点的发现方案中，仅支持远程终端通过一跳发现第一中继节点，而不支持远程终端通过多跳发现第一中继节点。从而，在一些场景下(例如，在森林中，在地下室中)，远程终端与第一中继节点的距离较远，远程终端难以发现第一中继节点，导致远程终端无法连接至网络。
为解决上述问题，本公开实施例提供的第一中继节点发现方法、装置及存储介质中，第二中继节点接收携带目标业务的业务标识的第一消息后，广播第一消息，以协助发现能够接入目标业务的第一中继节点。从而，实现远程终端通过多跳发现第一中继节点，扩大了远程终端能够发现第一中继节点的距离范围，扩大了网络覆盖范围，提高远程终端连接到网络的成功率，还有利于节省远程终端的耗电。
其中，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。
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。系统中还可以包括核心网部分，例如演进的分组系统(Evloved Packet System,EPS)、5G系统(5GS)等。
本公开实施例涉及的终端，可以是指向用户提供语音和/或数据连通性的设备，具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，终端的名称可能也不相同，例如在5G系统中，终端可以称为用户设备(User Equipment， UE)。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。
本公开实施例涉及的网络设备，可以是基站，该基站可以包括多个为终端提供服务的小区。根据具体应用场合不同，基站又可以称为接入点，或者可以是接入网中在空中接口上通过一个或多个扇区与无线终端通信的设备，或者其它名称。网络设备可用于将收到的空中帧与网际协议(Internet Protocol，IP)分组进行相互更换，作为无线终端与接入网的其余部分之间的路由器，其中接入网的其余部分可包括网际协议(IP)通信网络。网络设备还可协调对空中接口的属性管理。例如，本公开实施例涉及的网络设备可以是全球移动通信系统(Global System for Mobile communications，GSM)或码分多址接入(Code Division Multiple Access，CDMA)中的网络设备(Base Transceiver Station，BTS)，也可以是带宽码分多址接入(Wide-band Code Division Multiple Access，WCDMA)中的网络设备(NodeB)，还可以是长期演进(long term evolution，LTE)系统中的演进型网络设备(evolutional Node B，eNB或e-NodeB)、5G网络架构(next generation system)中的5G基站(gNB)，也可以是家庭演进基站(Home evolved Node B，HeNB)、中继节点(relay node)、家庭基站(femto)、微微基站(pico)等，本公开实施例中并不限定。在一些网络结构中，网络设备可以包括集中单元(centralized unit，CU)节点和分布单元(distributed unit，DU)节点，集中单元和分布单元也可以地理上分开布置。
网络设备与终端之间可以各自使用一或多根天线进行多输入多输出(Multi Input Multi Output,MIMO)传输，MIMO传输可以是单用户MIMO(Single User MIMO,SU-MIMO)或多用户MIMO(Multiple User MIMO,MU-MIMO)。根据根天线组合的形态和数量，MIMO传输可以是2D-MIMO、3D-MIMO、FD-MIMO或massive-MIMO，也可以是分集传输或预编码传输或波束赋形传输等。
参考图2，图2为本公开一实施例提供的应用场景示意图。如图2所示，本实施例提供了一种通信系统，该通信系统包括网络设备210、第一中继节点220、第二中继节点230和远程终端240。其中，远程终端240可以通过一个或多个第二中继节点230来发现第一中继节点220。在图2中，以两个远程终端240、两个第二中继节点230为例，其中一个远程终端240通过一个第二中继节点230发现第一中继节点220(远程终端240通过两跳发现第一中继节点220)，另一个远程终端240依次通过两个第二中继节点230发现第一中继节点220(远程终端240通过三跳发现第一中继节点220)。
参考图3，图3为本公开一实施例提供的第一中继节点发现方法的流程示意图。如图 3所示，本实施例的方法可以包括：
S301、第二中继节点接收第一消息，第一消息中携带目标业务的业务标识，用于通知第二中继节点协助发现能够接入目标业务的第一中继节点。
其中，能够接入目标业务的第一中继节点，可以理解为，第一中继节点支持目标业务，能够为其他终端提供与目标业务相关的服务，换句话说，其他终端可以通过第一中继节点与网络进行通信以进行目标业务。目标业务例如互联网(Internet)业务。
其中，目标业务的业务标识唯一，即不同业务的业务标识不同。
本实施例中，第二中继节点可以接收来自远程终端或者第一中继节点的第一消息。远程终端在确定待执行目标业务后，可向外发送携带目标业务的业务标识的第一消息，以通知接收到第一消息的第二中继节点协助该远程终端发现能够接入目标业务的第一中继节点。或者，第一中继节点在确定自身能够接入的目标业务后，可向外广播携带目标业务的业务标识的第一消息，这样，对于第二中继节点，如果存在需要执行目标业务的远程终端，那么通过第二中继节点广播的第一消息，能够快速确定为远程终端提供服务的第一中继节点。
S302、第二中继节点广播第一消息。
本实施例中，第二中继节点通过直连通信接口向外广播第一消息，以扩大第一消息的传播范围，从而在远程终端与第一中继节点的距离较远的情况下，也能够协助发现能够接入目标业务的第一中继节点。
其中，在第一消息来自远程终端的情况下，第二中继节点广播第一消息以使得第一中继节点或者其他第二中继节点接收到第一消息。如果是第一中继节点接收到第一消息，则第一中继节点根据自身是否能够接入目标业务，确定是否响应第一消息。如果第一中继节点能够接入目标业务，则响应第一消息，从而完成第一中继节点的发现。如果是其他第二中继节点接收到第一消息，则该其他第二中继节点可以继续向外广播第一消息，便于更远的第一中继节点接收到第一消息，扩大第一中继节点的发现范围。
其中，在第一消息来自第一中继节点的情况下，第二中继节点可以确定是否存在需要执行目标业务的远程终端，若确定存在，则通过直连通信接口向该远程终端发送消息，通过该消息告知该远程终端发现为其提供通信服务的第一中继节点，并通过广播的方式将来自第一中继节点的第一信息传递给其他第二中继节点，以便于被更远的远程终端发现该第一中继节点，扩大第一中继节点的被发现范围；如果确定不存在，则通过广播的方式将来自第一中继节点的第一信息传递给其他第二中继节点，以便于被更远的远程终端发现该第一中继节点，扩大第一中继节点的被发现范围。
从而，本实施例在远程终端与第一中继节点相距较远的情形下，可以基于第二中继节点和携带业务标识的第一消息，实现远程终端通过多跳(至少两跳：经过一个第二中继节点相当于是两跳，包括从远程终端到第二中继节点的一跳以及从第二中继节点到第一中继节点的一跳；经过多个第二中继节点则跳数大于2)发现能够接入该远程终端第一业务的第一中继节点，扩大了第一中继节点的发现范围，扩大了网络覆盖范围。
从上述实施例可以看出，可以通过两种模式来实现第一中继节点的发现：一种方式中，远程终端通过第一消息向外宣告自身需要的业务，在第二中继节点的协助下主动发现能够接入相应业务的第一中继节点；另一种方式中，第一中继节点通过第一消息向外宣告自身 所能够接入的业务，在第二中继节点的协助下被需要相应业务的远程终端发现。因此，通过两种不同的模式，提高了第一中继节点发现的灵活性。
后续通过实施例对该两种模式做进一步描述。
参考图4，图4为本公开另一实施例提供的第一中继节点发现方法的流程示意图。如图4所示，本实施例的方法可以包括：
S401、远程终端确定第一目标业务。
在一些实施例中，第一目标业务可以为待执行的目标业务。
本实施例中，远程终端上预先配置有远程终端允许接入的业务，远程终端可以根据用户的请求，也可以根据自身系统的默认配置在允许接入的业务中确定第一目标业务。在此，对如何确定第一目标业务不进行限定。
S402、远程终端广播携带目标业务的业务标识和远程终端的终端标识的第一消息，第一消息用于通知接收到第一消息的第二中继节点协助远程终端发现能够接入目标业务的第一中继节点。
其中，远程终端的终端标识唯一。
在一些可选的实施方式中，远程终端的终端标识可采用远程终端的应用层用户标识，远程终端的应用层用户标识例如为远程终端的应用程序上注册的用户名。从而，将远程终端的终端标识与业务相关联，有利于提高为不同的业务、不同的远程终端进行第一中继节点的发现的准确性。
本实施例中，远程终端在确定第一目标业务后，获取目标业务的业务标识和远程终端的终端标识，生成携带目标业务的业务标识和远程终端的终端标识的第一消息。接着，通过直连通信接口广播第一消息，以通过广播第一消息的方式向外宣告远程终端需要执行目标业务，尤其通知接收到第一消息的第二中继节点协助远程终端发现能够接入目标业务的第一中继节点。
S403、接收到第一消息的第二中继节点广播第一消息。
本实施例中，第二中继节点接收到第一消息后，从第一消息中获得目标业务的业务标识和远程终端的终端标识，得知远程终端待执行目标业务。为协助远程终端发现能够接入目标业务的第一中继节点，第二中继节点通过直连通信接口广播第一消息，便于距离远程终端较远的其他第二中继节点接收到第一消息，尤其是便于距离远程终端较远的第一中继节点接收到第一消息。
其中，第二中继节点接收到的第一消息可以是远程终端广播的第一消息，也可以是其他第二中继节点广播的来自远程终端的第一消息。
在一些可选的实施方式中，第二中继节点广播的第一消息中除了目标业务的业务标识和远程终端的终端标识外，还携带第二中继节点的节点标识。从而，可以通过第一消息中携带的远程终端的终端标识、一个或多个第二中继节点的节点标识，确定远程终端通过多跳发现第一中继节点的过程中所经过的第二中继节点，简练地说，便于通过这些标识信息，确定多跳过程的路径。进而，便于后续发现能够接入目标业务的第一中继节点后，可以将第一中继节点的相关信息按照这些标识信息所构成的路径一一返回给远程终端，便于按照这些标识信息所构成的路径建立远程终端与能够接入目标业务的第一中继节点的通信。
在一些可选的实施方式中，第二中继节点的节点标识采用第二中继节点的应用层用户 标识。
在一些可选的实施方式中，如图4所示，第二中继节点广播第一消息后，本实施例还包括：
S404、第二中继节点接收能够接入目标业务的第一中继节点返回的响应消息，响应消息用于指示第二中继节点协助通知远程终端已发现能够接入目标业务的第一中继节点。
其中，第一中继节点返回的响应消息中携带目标业务的业务标识和第一中继节点的节点标识，便于第二中继节点根据第一消息中目标业务的业务标识和第一中继节点的节点标识，确切得知第一中继节点能够接入目标业务。
本实施例中，第一中继节点在接收到第二中继节点广播的第一消息后，从第一消息中获取目标业务的业务标识和第二中继节点的节点标识。根据目标业务的业务标识，第一中继节点确定自身允许接入的业务中是否包括目标业务。如果第一中继节点允许接入的业务中包括目标业务(即如果第一中继节点能够接入目标业务)，则第一中继节点根据第二中继节点的节点标识，向该第二中继节点返回响应消息，否则不响应该第一消息。
S405、第二中继节点向远程终端发送响应消息。
其中，第二中继节点向远程终端发送的响应消息中携带目标业务的业务标识、第一中继节点的节点标识和第二中继节点的节点标识，便于远程终端根据目标业务的业务标识确定该第一中继节点所能够接入的目标业务具体是自身待执行的哪个业务，也便于后续基于第一中继节点的节点标识和第二中继节点的节点标识，建立远程终端、第二中继节点、第一中继节点、网络这一路径的通信连接。
本实施例中，第二中继节点可从响应消息中获得目标业务的业务标识、第一中继节点的节点标识，得到第一中继节点能够接入目标业务。继而，该第二中继节点在响应消息中添加自身的节点标识，或者，根据目标业务的业务标识、第一中继节点的节点标识和该第二中继节点的节点标识，重新生成新的响应消息。接着，第二中继节点根据目标业务的业务标识，确定第一消息传输至该第二中继节点时所经历的路径，按照该路径，向远程终端发送响应消息。其中，第二中继节点向远程终端发送响应消息，可以是第二中继节点直接向远程终端发送响应消息，也可以是第二中继节点向第一消息传输所经历路径中的上一第二中继节点发送响应消息。
从而，本实施例提供了第一中继节点发现过程可采用的模式之一，在该模式中，待执行目标业务的远程终端广播第一消息、接收到第一消息的第二中继节点再广播第一消息、……、直至能够接入目标业务的第一中继节点接收到第一消息。整个过程中，远程终端借助第二中继节点，通过多跳主动发现第一中继节点，能够发现距离远程终端自身更远的第一中继节点，有效地扩大了第一中继节点的发现范围，扩大了网络覆盖范围。
参考图5，图5为本公开另一实施例提供的第一中继节点发现方法的流程示意图。如图5所示，本实施例的方法可以包括：
S501、第一中继节点确定允许接入的目标业务。
S502、第一中继节点广播携带目标业务的业务标识和第一中继节点的节点标识的第一消息，第一消息用于通知接收到第一消息的第二中继节点协助第一中继节点被待执行目标业务的远程终端发现。
本实施例中，第一中继节点上预先配置有第一中继节点允许接入的一个或多个目标业 务，第一中继节点允许接入的目标业务是第一中继节点的能力的体现，第一中继节点可通过向外广播第一消息来宣告自身能力。第一中继节点可确定允许接入的目标业务后，获取目标业务的业务标识和自身的节点标识，生成携带目标业务的业务标识和自身节点标识的第一消息。继而，通过直连通信接口向外广播第一消息，便于相较于第一中继节点距离远程终端更近的第二中继节点接收到第一消息，进而由第二中继节点继续广播第一消息，以协助第一中继节点被待执行目标业务的远程终端发现。
在一些可选的实施方式中，第一中继节点的节点标识采用第一中继节点的应用层用户标识。
S503、接收到第一消息的第二中继节点广播第一消息。
本实施例中，第二中继节点接收到第一消息后，从第一消息中获得目标业务的业务标识和第一中继节点的终端标识，得知第一中继节点能够接入目标业务。为协助第一中继节点被发现待执行的远程终端发现，第二中继节点通过直连通信接口广播第一消息，便于距离远程终端较近的其他第二中继节点接收到第一消息，尤其是便于远程终端接收到第一消息。
其中，第二中继节点接收到的第一消息可以是第一中继节点广播的第一消息，也可以是其他第二中继节点广播的来自第一中继节点的第一消息。
在一些可选的实施方式中，第二中继节点广播的第一消息中除了目标业务的业务标识和第一中继节点的终端标识外，还携带第二中继节点的节点标识。从而，可以通过第一消息中携带的第一中继节点的终端标识、一个或多个第二中继节点的节点标识，确定第一中继节点通过多跳被远程终端发现的过程所经过的第二中继节点，简练地说，便于通过这些标识信息，确定多跳过程的路径。进而，便于后续待执行目标业务的远程终端接收到第一消息后，可以按照这些标识信息所构成的路径建立远程终端与第一中继节点的通信。
在一些可选的实施方式中，如图5所示，第二中继节点广播第一消息后，本实施例还包括：
S504、第二中继节点接收远程终端返回的连接请求消息，连接请求响应消息用于指示第二中继节点协助通知远程终端连接能够接入目标业务的第一中继节点。
本实施例中，远程终端在接收到第二中继节点广播的第一消息后，从第一消息中获取目标业务的业务标识，根据目标业务的业务标识，远程终端确定目标业务是否为自身待执行的业务。如果目标业务为远程终端待执行的业务，则远程终端根据第一消息中第二中继节点的节点标识，向该第二中继节点返回连接请求消息，表示远程终端选择与该第二中继节点进行连接，进而以实现与第一中继节点的通信。
如果目标业务不为远程终端待执行的业务，则不响应该第一消息。
S505、响应于连接请求消息，基于第二中继节点建立远程终端与第一中继节点之间的通信。
本实施例中，第二中继节点接收到远程终端的第一消息后，与远程终端建立连接，并基于第一消息传输时经历的路径，建立与其他第二中继节点或者第一中继节点的连接，以实现远程终端通过一个或多个第二中继节点与第一中继节点通信。在此，对具体的连接建立过程不做限制。
从而，本实施例提供了第一中继节点发现过程可采用的另一模式，在该模式中，能够 接入目标业务的第一中继节点，通过广播第一消息的方式向外宣告自身能够接入目标业务这一能力，接收到第一消息的第二中继节点再广播第一消息、……、直至待执行目标业务的远程终端接收到第一消息。整个过程中，第一中继节点借助第二中继节点，通过多跳被第一中继节点发现，有助于远程终端发现距离自身较远的第一中继节点，有效地扩大了第一中继节点的发现范围，扩大了网络覆盖范围。
基于前述任一实施例，在一些可选的实施方式中，第一消息中还携带目标业务是否允许通过中继方式接入的指示信息，换句话说，第一消息中还携带目标业务是否为允许通过中继方式接入的业务的指示信息，或者说，第一消息中还携带目标业务是否允许被中继的执行信息。如此，第二中继节点在接收到第一消息后，广播第一消息的过程包括：根据第一消息，确定目标业务是否允许通过中继方式接入；如果目标业务允许通过中继方式接入，则广播第一消息。
本实施例中，第二中继节点从第一消息中获取目标业务是否允许通过中继方式接入的指示信息，如果该指示信息指示目标业务允许通过中继方式接入，则表示远程终端可以通过中继节点与网络进行通信的方式来执行该目标业务，第二中继节点通过直连通信接口广播第一消息。如果该指示信息指示目标业务不允许通过中继方式接入，则表示远程终端不可以通过中继节点与网络进行通信的方式来执行该目标业务，第二中继节点不广播第一消息，此时远程终端需与网络直连来执行该目标业务。从而，对不允许通过中继方式接入的业务进行筛选，提高第二中继节点继续广播第一消息的准确性。
进一步在一些可选的实施方式中，第一消息中还携带目标业务允许通过中继方式接入的剩余跳数。其中，在远程终端或者第一中继节点广播第一消息时，第一消息中携带的该剩余跳数也即目标业务允许通过中继方式接入的最大跳数，在第二中继节点广播第一消息时，该第一消息携带的该剩余跳数即最大跳数减去已进行的跳数所剩下的跳数。例如，远程终端广播的第一消息中携带目标业务允许通过中继方式接入的最大跳数为10，第一个第二中继节点广播第一消息后该第一消息中携带目标业务允许通过中继方式接入的剩余跳数为9。
基于第一消息中还携带目标业务允许通过中继方式接入的剩余跳数，在确定目标业务允许通过中继方式接入后，第二中继节点广播第一消息还包括：第二中继节点确定目标业务允许中继方式接入的剩余跳数是否大于或等于1；如果目标业务允许中继方式接入的剩余跳数大于或等于1，则第二中继节点更新剩余跳数，并广播第一消息，广播的第一消息中携带更新后的剩余跳数。
本实施例中，第二中继节点从接收到的第一消息中获取目标业务允许中继方式接入的剩余跳数，如果该剩余跳数大于或等于1，则表示目标业务的接入过程还可以容纳更多的中继节点，因此第二中继节点通过直连通信接口广播第一消息，否则第二中继节点不广播第一消息。从而，对不满足允许的跳数的第一消息进行筛选，避免第二中继节点无限转发第一消息。
基于前述任一实施例，在一些可选的实施方式中，第二中继节点上预先配置有该第二中继节点允许接入的业务。此时，第二中继节点广播第一消息的过程还包括：第二中继节点确定自身允许接入的业务是否包括目标业务；若第二中继节点允许接入的业务包括目标业务，则第二中继节点广播第一消息。
本实施例中，第二中继节点可以根据第一消息中携带的目标业务的业务标识，确定目标业务是否位于该第二中继节点允许接入的业务中，若是，则表示第二中继节点可以接入目标业务，第二中继节点广播第一消息，否则，第二中继节点不广播第一消息。从而，通过为第二中继节点预先配置允许接入的业务，第二中继节点仅对自身能够接入的业务进行中继，减轻第二中继节点的负担，提高对第二中继节点的管理效果。
需要说明的是，上述筛选条件可以相互结合。比如，如果目标业务允许通过中继方式接入且目标业务为第二中继节点允许接入的业务，则第二中继节点广播第一消息；又如，如果目标业务允许通过中继方式接入且目标业务允许通过中继方式接入的剩余跳数大于或等于1且目标业务为第二中继节点允许接入的业务，则第二中继节点广播第一消息。
基于前述任一实施例，在一些可选的实施方式中，网络设备可预先为第一中继节点配置第一中继节点的策略参数。此时，第一中继节点发现方法还包括：第一中继节点从网络设备获取第一中继节点的策略参数，该策略参数包括如下至少一种：第一中继节点允许接入的业务、第一中继节点允许接入的业务是否允许通过中继方式接入、第一中继节点允许接入的业务允许通过中继方式接入的最大跳数。从而，提高对第一中继节点、第一中继节点允许接入的业务的管理效果，第一中继节点在广播第一消息时，可以根据策略参数来生成第一消息。
其中，第一中继节点从网络设备获取第一中继节点的策略参数，可以是第一中继节点主动向网络设备请求配置策略参数，也可以是网络设备主动为第一中继节点配置策略参数。例如，在第一中继节点开机时，第一中继节点主动向网络设备请求配置策略参数；又如，在网络设备与第一中继节点的通信成功建立时，网络设备主动向第一中继节点配置策略参数。
进一步在一些可选的实施方式中，网络设备包括策略控制功能(Policy Control Function，PCF)，可通过PCF为第一中继节点配置策略参数。此时，第一中继节点从网络设备获取第一中继节点的策略参数，包括：第一中继节点向PCF发送第二消息，第二消息用于向PCF请求策略参数，且第二消息指示第一中继节点的能力；第一中继节点接收PCF为第一中继节点配置的策略参数。其中，第二消息指示第一中继节点的能力，即第二消息指示第一中继节点为终端到网络的中继节点，也即指示第一中继节点所承担的角色或者功能，如此PCF可以根据第一中继节点的能力为第一中继节点准确配置策略参数。
基于前述任一实施例，在一些可选的实施方式中，网络设备可预先为第二中继节点配置第二中继节点的策略参数。此时，第一中继节点发现方法还包括：第二中继节点从网络设备获取第二中继节点的策略参数，该策略参数包括如下至少一种：第二中继节点允许接入的业务。从而，提高对第二中继节点、第二中继节点允许接入的业务的管理效果，第二中继节点在广播第一消息时，可以根据策略参数来确定是否广播第一消息，具体可参照前述相关内容，不再赘述。
其中，第二中继节点从网络设备获取第二中继节点的策略参数，可以是第二中继节点主动向网络设备请求配置策略参数，也可以是网络设备主动为第二中继节点配置策略参数。例如，在第二中继节点开机时，第二中继节点主动向网络设备请求配置策略参数；又如，在网络设备与第二中继节点的通信成功建立时，网络设备主动向第二中继节点配置策略参数。
进一步在一些可选的实施方式中，网络设备包括策略控制功能(Policy Control Function，PCF)，可通过PCF为第二中继节点配置策略参数。此时，第二中继节点从网络设备获取第二中继节点的策略参数，包括：第二中继节点向PCF发送第二消息，第二消息用于向PCF请求策略参数，且第二消息指示第二中继节点的能力；第二中继节点接收PCF为第二中继节点配置的策略参数。其中，第二消息指示第二中继节点的能力，即第二消息指示第二中继节点为终端到终端的中继节点，也即指示第二中继节点所承担的角色或者功能，如此PCF可以根据第二中继节点的能力为第二中继节点准确配置策略参数。
基于前述任一实施例，在一些可选的实施方式中，网络设备可预先为远程终端配置远程终端的策略参数。此时，第一中继节点发现方法还包括：远程终端从网络设备获取远程终端的策略参数，该策略参数包括如下至少一种：远程终端允许接入的业务、远程终端允许接入的业务是否允许通过中继方式接入、远程终端允许接入的业务允许通过中继方式接入的最大跳数。从而，提高对远程终端、远程终端允许接入的业务的管理效果，远程终端在广播第一消息时，可以根据策略参数来生成第一消息。
其中，远程终端从网络设备获取远程终端的策略参数，可以是远程终端主动向网络设备请求配置策略参数，也可以是网络设备主动为远程终端配置策略参数。例如，在远程终端开机时，远程终端主动向网络设备请求配置策略参数；又如，在网络设备与远程终端的通信成功建立时，网络设备主动向远程终端配置策略参数。
进一步在一些可选的实施方式中，网络设备包括策略控制功能(Policy Control Function，PCF)，可通过PCF为远程终端配置策略参数。此时，远程终端从网络设备获取第二中继节点的策略参数，包括：第远程终端向PCF发送第二消息，第二消息用于向PCF请求策略参数，且第二消息指示远程终端的能力；远程终端接收PCF为远程终端配置的策略参数。其中，第二消息指示远程终端的能力，即第二消息指示发送第二消息的终端为远程终端，如此PCF可以为远程终端准确配置策略参数。
参考图6，图6为本公开一实施例提供的网络设备为终端(终端可以为第一中继节点、第二中继节点、远程终端)配置策略参数的流程示意图。如图6所示，策略参数配置过程包括：
S601、终端向网络设备中的接入和移动性管理功能(Access and Mobility Management Function，AMF)发送第二消息，第二消息用于向PCF请求策略参数，且第二消息指示终端的能力。
本实施例中，终端向AMF发送第二消息，例如，在ProSe业务中，第二消息为注册请求(Registration Request)消息，用于向PCF请求提供ProSe策略参数，且第二消息指示终端在ProSe业务中的能力，例如，第二消息指示终端在ProSe业务中支持远程终端、支持第一中继节点，或者支持为第一中继节点提供连接的第二中继节点。
S602、AMF向终端返回第二消息的响应消息。
本实施例中，该响应消息用于通知终端AMF已接收到第二消息。
例如，在ProSe业务中，AMF在完成注册过程后向终端返回注册被接受(Registration Accept)的消息。
S603、AMF向PCF发送第三消息，以向PCF请求配置终端的策略参数。
本实施例中，第三消息用于请求PCF配置终端的策略参数，且第三消息指示终端的 能力，以便PCF根据终端的能力为终端配置策略参数。
S604、PCF向AMF返回第三消息的响应消息。
本实施例中，该响应消息用于AMF PCF已接收到第三消息。
S605、PCF向AMF发送策略参数。
本实施例中，根据终端的能力不同，PCF提供的策略参数不同，具体可以参照前述实施例中第一中继节点的策略参数、第二中继节点的策略参数、远程终端的策略参数，在此不再赘述。
S606、AMF向终端返回第四消息，第四消息中携带终端的策略参数。
其中，第四消息可为非接入层(Non-Access-Stratum，NAS)消息。
S607、终端向AMF返回策略参数传递结果。
其中，策略参数传递结果用于通知AMF终端是否成功接收策略参数。
S608、AMF向PCF返回策略参数下发结果。
其中，策略参数下发结果用于通知PCF终端是否成功接收策略参数
从而，在本实施中，基于网络设备中的AMF、PCF为第一中继节点、第二中继节点、远程终端配置相应的策略参数，以便第一中继节点、第二中继节点、远程终端基于各自的策略参数，进行上述任一实施例中的第一中继节点发现过程，实现远程终端通过多跳发现第一中继节点。
在终端侧，本公开实施例提供了一种第一中继节点发现装置，本实施例的第一中继节点发现装置可以为第二中继节点。如图7所示，第一中继节点发现装置可以包括收发机701、处理器702和存储器703。
收发机701，用于在处理器702的控制下接收和发送数据。
其中，在图7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702代表的一个或多个处理器和存储器703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701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，这些传输介质包括无线信道、有线信道、光缆等传输介质。在一些可选的实施方式中，第一中继节点发现装置还可以包括用户接口704，针对不同的用户设备，用户接口704还可以是能够外接内接需要设备的接口，连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器702负责管理总线架构和通常的处理，存储器703可以存储处理器702在执行操作时所使用的数据。
在一些可选的实施方式中，处理器702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702也可以采用多核架构。
处理器702通过调用存储器703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第二中继节点的任一方法。处理器与存储器也可以物理上分开布置。
具体的，处理器702用于执行如下操作：接收第一消息，第一消息中携带目标业务的业务标识，第一消息用于通知第二中继节点协助发现能够接入目标业务的第一中继节点；广播第一消息。
在一些可选的实施方式中，第一消息用于通知第二中继节点协助待执行目标业务的远程终端发现能够接入目标业务的第一中继节点；处理器702还执行如下操作：接收远程终端广播的第一消息；或者，接收其他第二中继节点广播的来自远程终端的第一消息；其中，第一消息中还携带远程终端的终端标识。
在一些可选的实施方式中，第一消息用于通知第二中继节点协助能够接入目标业务的第一中继节点被待执行目标业务的远程终端发现；处理器702还执行如下操作：接收第一中继节点广播的第一消息；或者，接收其他第二中继节点广播的来自第一中继节点的第一消息；其中，第一消息中还携带第一中继节点的节点标识。
在一些可选的实施方式中，第一消息中还携带目标业务是否允许通过中继方式接入的指示信息；处理器702还执行如下操作：根据第一消息，确定目标业务是否允许通过中继方式接入；如果目标业务允许通过中继方式接入，则广播第一消息。
在一些可选的实施方式中，第一消息中还携带目标业务通过中继方式接入的剩余跳数；处理器702还执行如下操作：确定目标业务通过中继方式接入的剩余跳数是否大于或等于1；如果剩余跳数大于或等于1，则更新剩余跳数，并广播第一消息，其中，广播的第一消息中携带更新后的剩余跳数。
在一些可选的实施方式中，处理器702还执行如下操作：如果目标业务允许通过中继方式接入，则确定允许接入的业务中是否包括目标业务；如果包括目标业务，则广播第一消息。
在一些可选的实施方式中，处理器702还执行如下操作：从网络设备获取第二中继节点的策略参数，策略参数包括第二中继节点允许接入的业务的业务标识。
在一些可选的实施方式中，网络设备包括策略控制功能PCF，处理器702还执行如下操作：向PCF发送第二消息，第二消息用于向PCF请求策略参数，且第二消息指示第二中继节点的能力；接收PCF为第二中继节点配置的策略参数。
在一些可选的实施方式中，处理器702还执行如下操作：接收第一中继节点返回的响应消息，响应消息用于指示第二中继节点协助通知远程终端已发现能够接入目标业务的第一中继节点；向远程终端发送响应消息。
在一些可选的实施方式中，处理器702还执行如下操作：接收远程终端返回的连接请求消息，连接请求消息用于指示第二中继节点协助远程终端连接能够接入目标业务的第一中继节点；响应于连接请求消息，基于第二中继节点建立远程终端与第一中继节点之间的通信。
在此需要说明的是，本公开提供的上述装置，能够实现上述方法实施例中第二中继节点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第一中继节点发现装置，本实施例的第一中继节点发现装置可以为远程终端。如图8所示，第一中继节点发现装置可以包括收发机801、处理器802和存储器803。
收发机801，用于在处理器802的控制下接收和发送数据。
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，这些传输介质包括无线信道、有线信道、光缆等传输介质。在一些可选的实施方式中，第一中继节点发现装置还可以包括用户接口804，针对不同的用户设备，用户接口804还可以是能够外接内接需要设备的接口，连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
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。
在一些可选的实施方式中，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远程终端的任一方法。处理器与存储器也可以物理上分开布置。
具体的，处理器802用于执行如下操作：确定第一目标业务；广播携带目标业务的业务标识和远程终端的终端标识的第一消息，第一消息用于通知接收到第一消息的第二中继节点协助远程终端发现能够接入目标业务的第一中继节点。
在一些可选的实施方式中，处理器802还执行如下操作：从网络设备获取远程终端的策略参数，策略参数包括如下至少一种：远程终端允许接入的业务、远端终端允许接入的业务是否允许通过中继方式接入、远程终端允许接入的业务允许通过中继方式接入的最大跳数。
在此需要说明的是，本公开提供的上述装置，能够实现上述方法实施例中远程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第一中继节点发现装置，本实施例的第一中继节点发现装置可以为第一中继节点。如图9所示，第一中继节点发现装置可以包括收发机901、处理器902和存储器903。
收发机901，用于在处理器902的控制下接收和发送数据。
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，这些传输介质包括无线信道、有线信道、光缆等传输介质。在一些可选的实施方式中，第一中继节点发现装置还可以包括用户接口904，针对不同的 用户设备，用户接口904还可以是能够外接内接需要设备的接口，连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
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。
在一些可选的实施方式中，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902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第一中继节点的任一方法。处理器与存储器也可以物理上分开布置。
具体的，处理器902用于执行如下操作：确定第一中继节点允许接入的目标业务；广播携带目标业务的业务标识和第一中继节点的节点标识的第一消息，第一消息用于通知接收到第一消息的第二中继节点协助第一中继节点被待执行目标业务的远程终端发现。
在一些可选的实施方式中，处理器902还执行如下操作：从网络设备获取第一中继节点的策略参数，策略参数包括如下至少一种：第一中继节点允许接入的业务、第一中继节点允许接入的业务是否允许通过中继方式接入、第一中继节点允许接入的业务允许通过中继方式接入的最大跳数。
在此需要说明的是，本公开提供的上述装置，能够实现上述方法实施例中第一中继节点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，本公开实施例还提供了一种第一中继节点发现装置，本实施例的第一中继节点发现装置可以为第二中继节点。如图10所示，第一中继节点发现装置包括：接收单元1001、发送单元1002。接收单元1001，用于接收第一消息，第一消息中携带目标业务的业务标识，第一消息用于通知第二中继节点协助发现能够接入目标业务的第一中继节点。发送单元1002，用于广播第一消息。
在一些可选的实施方式中，第一消息用于通知第二中继节点协助待执行目标业务的远程终端发现能够接入目标业务的第一中继节点；接收单元1001具体用于：接收远程终端广播的第一消息；或者，接收其他第二中继节点广播的来自远程终端的第一消息；其中，第一消息中还携带远程终端的终端标识。
在一些可选的实施方式中，第一消息用于通知第二中继节点协助能够接入目标业务的第一中继节点被待执行目标业务的远程终端发现；接收单元1001具体用于：接收第一中继节点广播的第一消息；或者，接收其他第二中继节点广播的来自第一中继节点的第一消息；其中，第一消息中还携带第一中继节点的节点标识。
在一些可选的实施方式中，第一消息中还携带目标业务是否允许通过中继方式接入的指示信息；发送单元1002具体用于：根据第一消息，确定目标业务是否允许通过中继方式接入；如果目标业务允许通过中继方式接入，则广播第一消息。
在一些可选的实施方式中，第一消息中还携带目标业务通过中继方式接入的剩余跳数；发送单元1002具体用于：确定目标业务通过中继方式接入的剩余跳数是否大于或等于1； 如果剩余跳数大于或等于1，则更新剩余跳数，并广播第一消息，其中，广播的第一消息中携带更新后的剩余跳数。
在一些可选的实施方式中，发送单元1002具体用于：如果目标业务允许通过中继方式接入，则确定允许接入的业务中是否包括目标业务；如果包括目标业务，则广播第一消息。
在一些可选的实施方式中，第一中继节点发现装置还包括：配置单元1003，用于从网络设备获取第二中继节点的策略参数，策略参数包括第二中继节点允许接入的业务的业务标识。
在一些可选的实施方式中，网络设备包括策略控制功能PCF，配置单元1003具体用于：向PCF发送第二消息，第二消息用于向PCF请求策略参数，且第二消息指示第二中继节点的能力；接收PCF为第二中继节点配置的策略参数。
在一些可选的实施方式中，接收单元1001还用于：接收第一中继节点返回的响应消息，响应消息用于指示第二中继节点协助通知远程终端已发现能够接入目标业务的第一中继节点；向远程终端发送响应消息。
在一些可选的实施方式中，接收单元1001还用于：接收远程终端返回的连接请求消息，连接请求消息用于指示第二中继节点协助远程终端连接能够接入目标业务的第一中继节点；响应于连接请求消息，基于第二中继节点建立远程终端与第一中继节点之间的通信。
在此需要说明的是，本公开提供的上述装置，能够实现上述方法实施例中第二中继节点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，本公开实施例还提供了一种第一中继节点发现装置，本实施例的第一中继节点发现装置可以为远程终端。如图11所示，第一中继节点发现装置包括：确定单元1101和发送单元1102。
确定单元1101，用于确定第一目标业务。发送单元1102，用于广播携带目标业务的业务标识和远程终端的终端标识的第一消息，第一消息用于通知接收到第一消息的第二中继节点协助远程终端发现能够接入目标业务的第一中继节点。
在一些可选的实施方式中，第一中继节点发现装置还包括：配置单元1103，用于从网络设备获取远程终端的策略参数，策略参数包括如下至少一种：远程终端允许接入的业务、远端终端允许接入的业务是否允许通过中继方式接入、远程终端允许接入的业务允许通过中继方式接入的最大跳数。
在此需要说明的是，本公开提供的上述装置，能够实现上述方法实施例中远程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，本公开实施例还提供了一种第一中继节点发现装置，本实施例的第一中继节点发现装置可以为第一中继节点。如图12所示，第一中继节点发现装置包括：确定单元1201、发送单元1202。
确定单元1201，用于确定第一中继节点允许接入的目标业务。
发送单元1202，用于广播携带目标业务的业务标识和第一中继节点的节点标识的第一消息，第一消息用于通知接收到第一消息的第二中继节点协助第一中继节点被待执行目 标业务的远程终端发现。
在一些可选的实施方式中，第一中继节点发现装置还包括：配置单元1203，用于从网络设备获取第一中继节点的策略参数，策略参数包括如下至少一种：第一中继节点允许接入的业务、第一中继节点允许接入的业务是否允许通过中继方式接入、第一中继节点允许接入的业务允许通过中继方式接入的最大跳数。
在此需要说明的是，本公开提供的上述装置，能够实现上述方法实施例中第一中继节点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。
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。
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，计算机程序用于使处理器执行本公开实施例提供的有关第二中继节点、远程终端、第一中继节点的任一方法。使处理器能够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。
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。
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流程图和/或方框图来描述的。应理解可由计算机可执行指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/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流程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，该指令装置实现在流程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流程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 (21)

  1. 一种第一中继节点发现方法，其中，应用于第二中继节点，所述方法包括：接收第一消息，所述第一消息中携带目标业务的业务标识，所述第一消息用于指示协助发现能够接入所述目标业务的第一中继节点；广播所述第一消息。
  2. 根据权利要求1所述的第一中继节点发现方法，其中，所述第一消息用于指示协助远程终端发现能够接入所述目标业务的第一中继节点；
    所述接收第一消息，包括：接收所述远程终端广播的第一消息；或者，接收其他第二中继节点广播的来自所述远程终端的第一消息；其中，所述第一消息中还携带所述远程终端的终端标识。
  3. 根据权利要求1所述的第一中继节点发现方法，其中，所述第一消息用于指示协助能够接入所述目标业务的第一中继节点被发现；所述接收第一消息，包括：
    接收所述第一中继节点广播的第一消息；或者，接收其他第二中继节点广播的来自所述第一中继节点的第一消息；其中，所述第一消息中还携带所述第一中继节点的节点标识。
  4. 根据权利要求1-3中任一项所述的第一中继节点发现方法，其中，所述第一消息中还携带所述目标业务是否允许通过中继方式接入的指示信息；所述广播所述第一消息，包括：根据所述第一消息，确定所述目标业务是否允许通过中继方式接入；如果所述目标业务允许通过中继方式接入，则广播所述第一消息。
  5. 根据权利要求4所述的第一中继节点发现方法，其中，所述第一消息中还携带所述目标业务允许通过中继方式接入的剩余跳数；所述如果所述目标业务允许通过中继方式接入，则广播所述第一消息，包括：确定所述目标业务允许通过中继方式接入的剩余跳数是否大于或等于1；如果所述剩余跳数大于或等于1，则更新所述剩余跳数，并广播所述第一消息，其中，广播的所述第一消息中携带更新后的所述剩余跳数。
  6. 根据权利要求4所述的第一中继节点发现方法，其中，所述如果所述目标业务允许通过中继方式接入，则广播所述第一消息，包括：如果所述目标业务允许通过中继方式接入，则确定所述第二中继节点允许接入的业务中是否包括所述目标业务；如果所述第二中继节点允许接入的业务中包括所述目标业务，则广播所述第一消息。
  7. 根据权利要求6所述的第一中继节点发现方法，其中，所述接收第一消息之前，还包括：从网络设备获取所述第二中继节点的策略参数，所述策略参数包括所述第二中继节点允许接入的业务的业务标识。
  8. 根据权利要求7所述的第一中继节点发现方法，其中，所述网络设备包括策略控制功能PCF，所述从网络设备获取所述第二中继节点的策略参数，包括：向所述PCF发送第二消息，所述第二消息用于向所述PCF请求所述策略参数，且所述第二消息指示所述第二中继节点的能力；接收所述PCF为所述第二中继节点配置的策略参数。
  9. 根据权利要求2所述的第一中继节点发现方法，其中，所述广播所述第一消息之后，还包括：接收所述第一中继节点返回的响应消息，所述响应消息用于指示所述第二中继节点协助通知所述远程终端已发现能够接入所述目标业务的第一中继节 点；向所述远程终端发送所述响应消息。
  10. 根据权利要求3所述的第一中继节点发现方法，其中，所述广播所述第一消息之后，还包括：接收所述远程终端返回的连接请求消息，所述连接请求消息用于指示协助所述远程终端连接能够接入所述目标业务的第一中继节点；响应于所述连接请求消息，基于所述第二中继节点建立所述远程终端与所述第一中继节点之间的通信。
  11. 一种第一中继节点发现方法，其中，应用于远程终端，所述方法包括：确定第一目标业务；广播携带所述第一目标业务的业务标识和所述远程终端的终端标识的第一消息，所述第一消息用于指示接收到所述第一消息的第二中继节点协助所述远程终端发现能够接入所述目标业务的第一中继节点。
  12. 一种第一中继节点发现方法，其中，应用于第一中继节点，所述方法包括：确定所述第一中继节点允许接入的目标业务；广播携带所述目标业务的业务标识和所述第一中继节点的节点标识的第一消息，所述第一消息用于指示接收到所述第一消息的第二中继节点协助所述第一中继节点被发现。
  13. 一种第一中继节点发现装置，其中，应用于第二中继节点，所述第一中继节点发现装置包括存储器、收发机和处理器；
    所述存储器，用于存储计算机程序；
    所述收发机，用于在所述处理器的控制下收发数据；
    所述处理器，用于读取所述存储器中的计算机程序并执行如下操作：接收第一消息，所述第一消息中携带目标业务的业务标识，所述第一消息用于指示协助发现能够接入所述目标业务的第一中继节点；广播所述第一消息。
  14. 根据权利要求13所述的第一中继节点发现装置，其中，所述第一消息用于指示协助待执行所述目标业务的远程终端发现能够接入所述目标业务的第一中继节点；
    所述处理器还执行如下操作：接收所述远程终端广播的第一消息；或者，接收其他第二中继节点广播的来自所述远程终端的第一消息；其中，所述第一消息中还携带所述远程终端的终端标识。
  15. 根据权利要求13所述的第一中继节点发现装置，其中，所述第一消息用于指示协助能够接入所述目标业务的第一中继节点被待执行所述目标业务的远程终端发现；所述处理器还执行如下操作：接收所述第一中继节点广播的第一消息；或者，接收其他第二中继节点广播的来自所述第一中继节点的第一消息；其中，所述第一消息中还携带所述第一中继节点的节点标识。
  16. 一种第一中继节点发现装置，其中，应用于远程终端，所述第一中继节点发现装置包括存储器、收发机和处理器；
    所述存储器，用于存储计算机程序；
    所述收发机，用于在所述处理器的控制下收发数据；
    所述处理器，用于读取所述存储器中的计算机程序并执行如下操作：确定第一目标业务；广播携带所述第一目标业务的业务标识和所述远程终端的终端标识的第一消息，所述第一消息用于指示接收到所述第一消息的第二中继节点协助所述远程终端发现能够接入所述目标业务的第一中继节点。
  17. 一种第一中继节点发现装置，其中，应用于第一中继节点，所述第一中继节点发现装置包括存储器、收发机和处理器；
    所述存储器，用于存储计算机程序；
    所述收发机，用于在所述处理器的控制下收发数据；
    所述处理器，用于读取所述存储器中的计算机程序并执行如下操作：确定所述第一中继节点允许接入的目标业务；广播携带所述目标业务的业务标识和所述第一中继节点的节点标识的第一消息，所述第一消息用于指示接收到所述第一消息的第二中继节点协助所述第一中继节点被待执行所述目标业务的远程终端发现。
  18. 一种第一中继节点发现装置，其中，应用于第二中继节点，所述第一中继节点发现装置包括：接收单元，用于接收第一消息，所述第一消息中携带目标业务的业务标识，所述第一消息用于指示协助发现能够接入所述目标业务的第一中继节点；发送单元，用于广播所述第一消息。
  19. 一种第一中继节点发现装置，其中，应用于远程终端，所述第一中继节点发现装置包括：确定单元，用于确定第一目标业务；发送单元，用于广播携带所述第一目标业务的业务标识和所述远程终端的终端标识的第一消息，所述第一消息用于指示接收到所述第一消息的第二中继节点协助所述远程终端发现能够接入所述目标业务的第一中继节点。
  20. 一种第一中继节点发现装置，其中，应用于第一中继节点，所述第一中继节点发现装置包括：确定单元，用于确定所述第一中继节点允许接入的目标业务；发送单元，用于广播携带所述目标业务的业务标识和所述第一中继节点的节点标识的第一消息，所述第一消息用于指示接收到所述第一消息的第二中继节点协助所述第一中继节点被待执行所述目标业务的远程终端发现。
  21. 一种计算机可读存储介质，其中，所述计算机可读存储介质存储有计算机程序，所述计算机程序用于使所述计算机执行权利要求1至12中任一项所述的第一中继节点发现方法。
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