WO2023207900A1 - Terminal discovery method and apparatus, terminal, and network-side device - Google Patents

Abstract

The present application relates to the field of wireless communications, and disclosed thereby are a terminal discovery method and apparatus, a terminal, and a network-side device. The terminal discovery method of embodiments of the present application comprises: in a predetermined situation, a first terminal executes a discovery process of a second terminal for the purpose of multi-path establishment.

Description

Terminal discovery method, device, terminal and network side equipment

cross reference

This invention requires the priority of the Chinese patent application submitted to the China Patent Office on April 26, 2022, with the application number 202210446119.6 and the invention name "Terminal discovery method, device, terminal and network side equipment". The entire content of the application incorporated herein by reference.

Technical field

This application belongs to the field of wireless communication technology, and specifically relates to a terminal discovery method, device, terminal and network side equipment.

Background technique

Relay technology in wireless communication systems adds one or more relay nodes between the base station and the terminal, which is responsible for forwarding the wireless signal one or more times. That is, the wireless signal must go through multiple hops to reach it. terminal. Wireless relay technology can not only expand cell coverage and make up for cell coverage blind spots, but can also increase cell capacity through spatial resource reuse. For indoor coverage, Relay technology can also overcome penetration loss and improve indoor coverage quality.

Taking the simpler two-hop relay as an example, wireless relay divides a base station-terminal link into two links: base station-relay station and relay station-terminal, thereby having the opportunity to replace a poor quality link with two links. A better quality link to obtain higher link capacity and better coverage. For example, in a typical UE-to-Network scenario, the remote terminal (Remote UE) needs to transmit data with the network side, but due to poor coverage, the relay terminal (Relay UE) is found. Among them, the Uu interface is between Relay UE and the base station, and the sidelink (SL) interface (also called PC5 interface) is between Relay UE and Remote UE.

In the existing SL relay scenario, relay UE and remote UE need to go through the discovery process to interact with each other and facilitate the establishment of subsequent relay links.

For relay UE, in order to avoid relay UE performing relay transmission when its own link is poor or when it is close to the base station, reducing transmission efficiency and increasing interference, the network side can optionally configure two thresholds. One is the reference The signal received power (Reference Signal Received Power, RSRP) is the highest (high) threshold, and the other is the RSRP lowest (low) threshold. That is, the relay UE is allowed to perform only when the RSRP of the relay UE to the serving cell is lower than the high threshold and higher than the low threshold. discovery process. For remote UE, the network side optionally configures an RSRP high threshold. Only when the RSRP from the remote UE to the serving cell is lower than the high threshold, the remote UE is allowed to perform the discovery process, that is, it is only allowed to be at the edge of the cell or on the link. The terminals in the crossover situation perform relay transmission to prevent other terminals from wasting the resources of the two links and ensure the overall resource efficiency of the system.

In related technologies, between the terminal and the network side, one situation is to establish a direct path (Direct path), that is, the terminal establishes a wireless link with the base station through the Uu air interface, and the other situation is an indirect path (Indirect path). That is, the terminal (remote UE) establishes a wireless link with the base station through another terminal (relay UE) and the air interface of the other terminal, and the terminal establishes For non-direct paths, the network needs to control the terminal to perform the relay UE discovery process only when the link conditions are poor enough, and there are also threshold restrictions on the relay discovery process so that only UEs that meet the link quality requirements can perform the discovery process. Establishment of trunk link.

However, in some cases, in order to obtain better transmission quality, the terminal may need both direct and indirect paths (i.e., multipath). In the case of establishing multipath, a discovery process also needs to be performed. Related Technology A method of discovering terminals for the purpose of multipath establishment has not yet been provided.

Contents of the invention

Embodiments of the present application provide a terminal discovery method, device, terminal and network side equipment, which can realize the terminal discovery process for the purpose of multi-path establishment.

In a first aspect, a terminal discovery method is provided, including: under a predetermined situation, the first terminal performs a discovery process of a second terminal for the purpose of multipath establishment.

In a second aspect, a terminal discovery device is provided, including: a first determination module, used to determine that a predetermined condition is met; and an execution module, used to execute a second terminal discovery process for the purpose of multipath establishment.

In a third aspect, a terminal discovery method is provided, including: a network side device sending target information related to a discovery process to the first terminal, wherein the discovery process includes: a discovery process for the purpose of multi-path establishment; The target information includes at least one of the following: first threshold information, wherein the first threshold information is used for the discovery process of the relay node and the discovery process for the purpose of multipath establishment; the second threshold information, wherein the The second threshold information is used for control signaling of a discovery process for the purpose of multipath establishment, wherein the control signaling instructs the first terminal to perform a discovery process of the second terminal for the purpose of multipath establishment.

In a fourth aspect, a terminal discovery device is provided, including: a second determination module for determining target information related to a discovery process, wherein the discovery process includes: a discovery process for the purpose of multi-path establishment; The target information includes at least one of the following: first threshold information, wherein the first threshold information is used for the discovery process of the relay node and the discovery process for the purpose of multipath establishment; the second threshold information, wherein the The second threshold information is used for the discovery process for the purpose of multi-path establishment; control signaling, wherein the control signaling instructs the first terminal to perform the discovery process of the second terminal for the purpose of multi-path establishment; the transceiver module , used to send the target information to the first terminal.

In a fifth aspect, a terminal is provided. The terminal includes a processor and a memory. The memory stores programs or instructions that can be run on the processor. When the program or instructions are executed by the processor, the following implementations are implemented: The steps of the method described in one aspect.

A sixth aspect provides a terminal, including a processor and a communication interface, wherein the processor is used to implement the steps of the method described in the first aspect, and the communication interface is used to communicate with an external device.

In a seventh aspect, a network side device is provided. The network side device includes a processor and a memory. The memory stores programs or instructions that can be run on the processor. The program or instructions are executed by the processor. When implementing the steps of the method described in the third aspect.

In an eighth aspect, a network side device is provided, including a processor and a communication interface, wherein the processor is used to To implement the steps of the method described in the third aspect, the communication interface is used to communicate with an external device.

A ninth aspect provides a terminal discovery system, including: a terminal and a network side device. The terminal can be used to perform the steps of the method described in the first aspect, and the network side device can be used to perform the steps of the method described in the third aspect. steps of the method.

In a tenth aspect, a readable storage medium is provided. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method are implemented as described in the first aspect. The steps of the method described in the third aspect.

In an eleventh aspect, a chip is provided. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the method described in the first aspect. The steps of a method, or steps of implementing a method as described in the third aspect.

In a twelfth aspect, a computer program/program product is provided, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement as described in the first aspect The steps of the method, or the steps of implementing the method as described in the third aspect.

In the embodiment of the present application, the first terminal executes the discovery process of the second terminal for the purpose of multi-path establishment under predetermined circumstances, so that the discovery process of the terminal for the purpose of multi-path establishment can be realized, thereby supporting the simultaneous establishment of terminals. Multipath improves the transmission quality of the terminal.

Description of the drawings

Figure 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable;

Figure 2a is a schematic diagram of a multipath scenario under the SL relay architecture in the embodiment of the present application;

Figure 2b is a schematic diagram of another multipath scenario under the SL relay architecture in the embodiment of the present application;

Figure 2c is a schematic diagram of another multipath scenario under the SL relay architecture in the embodiment of the present application;

Figure 3a is a schematic diagram of a multipath scenario under the non-SL relay architecture in the embodiment of the present application;

Figure 3b is a schematic diagram of another multipath scenario under the non-SL relay architecture in the embodiment of the present application;

Figure 3c is a schematic diagram of another multipath scenario under the non-SL relay architecture in the embodiment of the present application;

Figure 4a shows a schematic flow chart of a terminal discovery method provided by an embodiment of the present application;

Figure 4b shows another schematic flow chart of the terminal discovery method provided by the embodiment of the present application;

Figure 4c shows another schematic flowchart of the terminal discovery method provided by the embodiment of the present application;

Figure 5 shows another schematic flowchart of a terminal discovery method provided by an embodiment of the present application;

Figure 6 shows a schematic structural diagram of a terminal discovery device provided by an embodiment of the present application;

Figure 7 shows another schematic structural diagram of a terminal discovery device provided by an embodiment of the present application;

Figure 8 shows a schematic structural diagram of a communication device provided by an embodiment of the present application;

Figure 9 shows a schematic diagram of the hardware structure of a terminal provided by an embodiment of the present application;

Figure 10 shows a schematic hardware structure diagram of a network-side device provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art fall within the scope of protection of this application.

The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and that "first" and "second" are distinguished objects It is usually one type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the related objects are in an "or" relationship.

It is worth pointing out that the technology described in the embodiments of this application is not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced, LTE-A) systems, and can also be used in other wireless communication systems, such as code Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access, OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technology can be used not only for the above-mentioned systems and radio technologies, but also for other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in much of the following description, but these techniques can also be applied to applications other than NR system applications, such as 6th ^generation Generation, 6G) communication system.

Figure 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a palmtop computer, a netbook, or a super mobile personal computer. (ultra-mobile personal computer, UMPC), mobile Internet device (Mobile Internet Device, MID), augmented reality (AR)/virtual reality (VR) equipment, robots, wearable devices (Wearable Device) , Vehicle User Equipment (VUE), Pedestrian User Equipment (PUE), smart home (home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), game consoles, personal computers (personal computer, PC), teller machine or self-service machine and other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets) bracelets, smart anklets, etc.), smart wristbands, smart clothing, etc. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network side device 12 may include an access network device and/or a core network device, where the access network device 12 may also be called a radio access network device, a radio access network (Radio Access Network, RAN), or a radio access network. function or radio access network unit. The access network device 12 may include a base station, a Wireless Local Area Network (WLAN) access point or a Wireless Fidelity (WiFi) node, etc. The base station may be called a node. Point B, Evolved NodeB (eNB), access point, Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (Extended Service Set, ESS), home B node, home evolved B node, transmitting receiving point (Transmitting Receiving Point, TRP) or some other appropriate term in the field, as long as the same technical effect is achieved, the base station Without being limited to specific technical terms, it should be noted that in the embodiment of this application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

The terminal can establish multi-path based on the SL relay architecture, as shown in Figure 2a, Figure 2b and Figure 2c. The remote terminal (Remote UE) has established an indirect path (indirect path) and a direct path (direct path) at the same time. The communication of user plane (User Plane, UP) and/or control plane (Control Plane, CP) is realized through indirect connection path or direct connection path. In the indirect connection path, the remote terminal and the relay terminal (relay UE) The connection between them is the side link (PC5) interface.

In addition, the terminal can also establish multipath based on the non-SL relay architecture, as shown in Figure 3a, Figure 3b and Figure 3c. The connection between the two UEs is not a sidelink (PC5) interface. It is assumed that the interface between them is a wired connection or ideal inter-UE connection. Multipath here means that the primary terminal (Primary UE, that is, the terminal that needs to establish multipath) has established both an indirect path and a direct path.

In multipath transmission, since the goal of multipath transmission is better transmission quality, such as reliability and throughput, this requirement is different from the triggering of traditional relay links. The latter is generally triggered on the remote UE link. The discovery process is triggered when the link quality is poor enough, and the former usually starts the discovery process and multi-path establishment for UEs with better link quality to obtain better transmission efficiency. Therefore, for the establishment of indirect paths in multipath, what kind of discovery triggering mechanism is adopted is a technical issue that needs to be solved at present.

In this embodiment of the present application, a terminal discovery method is provided. In this method, the terminal can perform terminal discovery in the following manner.

When the remote UE discovery threshold of the relay link is configured on the network side, the remote UE (or, it can also be called the primary UE (primary UE)) performs different discovery behaviors when establishing a separate relay link and establishing multiple paths. ;

When the relay UE discovery threshold of the relay link is configured on the network side, the relay UE (or, it can also be called the secondary UE (secondary UE)) performs different discovery behaviors when establishing a separate relay link and establishing multiple paths;

When the remote UE discovery/primary UE discovery threshold dedicated to multipath is configured on the network side, the remote UE/primary UE uses different thresholds to perform discovery behavior when establishing a separate relay link and establishing multipath;

When the network side is configured with a relay/secondary UE discovery threshold dedicated to multipath, the relay UE/secondary UE uses different thresholds to perform discovery behavior when establishing a separate relay link and establishing multipath;

When the remote UE/primary UE is in the RRC connected state, the UE can be controlled by the network side, and the network side explicitly or implicitly indicates whether to allow the UE to perform the discovery process regarding multi-path establishment;

When the relay UE/secondary UE is in the RRC connected state, the UE can also be controlled by the network side, and the network side explicitly or implicitly indicates whether to allow the UE to perform the discovery process related to multi-path establishment.

The terminal discovery method provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings through some embodiments and application scenarios.

Figure 4a shows a schematic flowchart of a terminal discovery method in an embodiment of the present application. The method 410 can be executed by the first terminal. In other words, the method may be performed by software or hardware installed on the first terminal. As shown in Figure 4a, the method may include the following steps.

In step S402, under predetermined circumstances, the first terminal performs a discovery process of the second terminal for the purpose of multi-path establishment.

In a possible implementation manner of the embodiment of the present application, the first terminal performing a discovery process of the second terminal for the purpose of multi-path establishment includes: the first terminal sends a first discovery message, wherein the first terminal A discovery message is used to initiate a discovery process of the second terminal for the purpose of multipath establishment; that is, the first terminal, as the initiator of the discovery process, initiates the first discovery message to discover the second terminal.

For example, the first terminal, as a remote terminal or master terminal that needs to establish multipath, can broadcast and send the first discovery message under predetermined circumstances. After detecting the first discovery message, the second terminal determines that the second terminal can When acting as a secondary terminal, a response message can be sent to the first terminal, so that the first terminal discovers the second terminal, and then establishes a non-direct path with the network side device through the second terminal.

Alternatively, the first terminal, as a relay terminal or auxiliary terminal that assists in establishing multipath, may broadcast and send the first discovery message under predetermined circumstances. After detecting the first discovery message, the second terminal determines that it needs to establish multipath. In the case of a path, a response message can be sent to the first terminal, so that the first terminal can discover the second terminal, and the second terminal can discover the first terminal, and then the second terminal can establish a connection with the network side device through the first terminal. Indirect path.

In another possible implementation of the embodiment of the present application, the first terminal performing a discovery process of the second terminal for the purpose of multipath establishment includes: the first terminal sends a discovery response message, wherein the discovery The response message is used to respond to the received second discovery message, and the second discovery message is used to initiate a discovery process for the purpose of multipath establishment. That is, the first terminal, as a responder of the discovery process, sends a discovery response message in response to the second discovery message to discover the second terminal.

For example, the first terminal, as a remote terminal or master terminal that needs to establish multipath, may detect that the second terminal broadcasts and sends the second discovery message under predetermined circumstances, and determines that the first terminal needs to establish multipath, The response message can be sent to the first terminal, so that the first terminal discovers the second terminal, and then establishes a non-direct path with the network side device through the second terminal.

Alternatively, the first terminal, as a relay terminal or auxiliary terminal that assists in establishing multipath, may detect the broadcast and send the second discovery message under predetermined circumstances. If it is determined that the first terminal can assist in establishing multipath, it may The first terminal sends a response message, thereby enabling the first terminal to discover the second terminal, enabling the second terminal to discover the first terminal, and thereby enabling the second terminal to establish a non-direct path with the network side device through the first terminal.

In the embodiment of the present application, the first terminal may execute the second terminal function for the purpose of multi-path establishment under predetermined circumstances. The discovery process can realize the discovery process of terminals for the purpose of multi-path establishment, thereby supporting terminals to establish multi-paths at the same time and improving the transmission quality of terminals.

In a possible implementation, the predetermined situation includes one of the following:

(1) The first terminal determines that it is necessary to perform a discovery process of the second terminal for the purpose of multipath establishment.

In this possible implementation, the first terminal may perform the discovery process of the second terminal at any time when it is necessary to perform the discovery process of the second terminal for the purpose of multipath establishment.

For example, when the current serving cell supports multi-path discovery and/or multi-path function, that is, the UE is allowed to initiate the multi-path discovery process, the first terminal performs the discovery process of the second terminal without any additional threshold restrictions.

Alternatively, the first terminal can add some service or authorization restrictions on the basis of the above. For example, only specific services are allowed to perform multi-pathing. That is, the first terminal can use the current serving cell to support multi-path discovery and/or multi-path functions. In this case, when executing a specific service, the discovery process of the second terminal is performed. Or only UEs authorized by the operator and/or the core network can perform the discovery process of the second terminal. Or authorize the authorized services of the UE. After these services of the authorized UE are established, the UE is allowed to initiate the multi-path discovery process.

In this possible implementation, the first terminal can perform the discovery process of the second terminal for the purpose of multipath establishment when it needs to perform the discovery process, thereby improving the communication quality of the first terminal or the second terminal.

(2) The first terminal determines that the first threshold information satisfies the discovery process of the relay node.

For example, the first threshold information may include: a first highest RSRP threshold (RSRP high threshold) for the first terminal as a remote terminal to perform a discovery process of the relay node.

Through this possible implementation, the first threshold information configured by the network-side device for the first terminal for the discovery process of the relay node can be reused to determine whether to execute the discovery process for the purpose of multi-path establishment, thereby reducing the number of network-side devices. configuration signaling.

(3) The first terminal determines the second threshold information that satisfies the discovery process for multi-path establishment.

The second threshold information may be a threshold value for a discovery process for multipath establishment. For example, the second threshold information includes: the second highest RSRP (RSRP high) of the first terminal performing a discovery process for multipath establishment. threshold and/or a first lowest RSRP (RSRP low) threshold at which the first terminal performs a discovery procedure for multipath establishment.

In this possible implementation, the second threshold information for the discovery process of multi-path establishment configured by the network side device for the first terminal can be used, so that dedicated threshold information can be configured for multi-path establishment to meet the requirements of multi-path establishment. specific needs.

(4) The first terminal receives control signaling sent by the network side device in the connected state, wherein the control signaling instructs the first terminal to perform a discovery process of the second terminal for the purpose of multi-path establishment. .

For example, the network side device controls the first terminal in the connected state to perform the discovery process of the second terminal through RRC dedicated signaling.

In this possible implementation, the network side device can control the first terminal to perform a discovery process of the second terminal for the purpose of multipath establishment. For example, the network side device can control the first terminal according to the signal of the current direct path with the first terminal. Quality or service information currently executed by the first terminal, etc., to determine whether the first terminal needs to establish multipath to improve communication reliability. sex.

Figure 4b shows another schematic flowchart of the terminal discovery method provided by the embodiment of the present application. The method 420 can be executed by the first terminal. In other words, the method may be performed by software or hardware installed on the first terminal. In method 420, the first terminal is a terminal that needs to establish multipath. For example, the first terminal can serve as a remote UE or a master UE. The following mainly describes the implementation methods in method 420 that are different from method 410. The implementation methods described in method 410 are all applicable to method 420.

As shown in Figure 4b, the method mainly includes the following steps: S404, under predetermined circumstances, the first terminal performs a discovery process of the second terminal for the purpose of multi-path establishment, wherein the first terminal performs the discovery process during the discovery process. During the process, a discovery-related message carrying first indication information is sent, and the first indication information is used to indicate that the first terminal performs the discovery process in order to establish multipath.

For example, the remote UE or the main UE performs the discovery process in order to establish multipath. During the discovery process, a discovery-related message carrying the first indication information is initiated to indicate that the first terminal performs the discovery process in order to establish multipath. Distinguish the purpose of traditional relay link. The discovery-related messages include but are not limited to discovery initiation messages or discovery response messages.

In a possible implementation manner, the above-mentioned discovery related message also carries second indication information, where the second indication information is used to indicate the service type for which the multipath is established. The second indication information can enable the second terminal to identify and determine whether multipath transmission services can be provided for it, so that multipath can be established for a specific service type.

In a possible implementation, the first indication information includes a link service code. The link service code indicates the purpose of the discovery process. For example, the link service code may include a relay service code (Relay service code) to reuse the establishment of a traditional relay link to determine whether the second terminal can identify and determine whether it can provide multi-path transmission services and traditional relay link services. it's the same. Alternatively, the link service code may also include a multi-path service code, which determines whether the second terminal can identify and determine whether it can provide multi-path transmission services according to the requirements of multi-path transmission.

In a possible implementation, when the first terminal is a terminal that needs to establish multipath, the first terminal performs a discovery process of the second terminal for the purpose of multipath establishment, including the following (1) to ( One of 4).

(1) When it is determined that it is necessary to perform a discovery process of the second terminal for the purpose of multipath establishment, the first terminal performs a discovery process of the second terminal for the purpose of multipath establishment.

For example, when the RSRP high threshold of traditional remote UE discovery is not configured, a remote/primary UE can initiate or respond to the multipath establishment discovery process at any time, that is, there is no threshold limit.

Or, when the RSRP high threshold of traditional remote UE discovery is configured, a remote/primary UE can also initiate or respond to the discovery process of multi-path establishment at any time when necessary, that is, it is not restricted by the traditional remote UE threshold.

For another example, when the RSRP high/low threshold of the remote/primary UE used for multi-path establishment is not configured, a remote/primary UE can initiate or respond to the discovery process of multi-path establishment at any time, that is, there is no threshold restriction.

Through this possible implementation, the first terminal can perform a discovery process for the purpose of multipath at any time when multipath needs to be established.

(2) When the first terminal is configured with the first threshold information and the reference signal received power RSRP of the serving cell of the first terminal meets the first threshold information, the first terminal executes The discovery process of the second terminal for the purpose of multi-path establishment, wherein the first threshold information includes: the first highest RSRP threshold for the first terminal to perform the discovery process of the relay node as a remote terminal.

For example, when the RSRP high threshold of traditional remote UE discovery is configured, a remote UE/primary UE needs to be allowed to initiate or respond to the multi-path establishment discovery process only when the RSRP of its serving cell is lower than the threshold. That is, it is subject to traditional remote UE discovery. UE threshold restrictions.

Through this possible implementation, the first threshold information used for the discovery process of the relay node can be reused to determine whether to perform the discovery process for the purpose of multipath, thereby reducing the configuration of the network side device.

(3) When the first terminal is configured with the second threshold information and the RSRP of the serving cell of the first terminal meets the second threshold information, the first terminal performs multi-path establishment For the purpose of the discovery process of the second terminal, the second threshold information includes: the second highest RSRP threshold for the first terminal to perform the discovery process for multi-path establishment and/or the first terminal to perform the discovery process for multi-path establishment. The first lowest RSRP threshold of the discovery process.

For example, when the RSRP high threshold for remote/primary UE used for multi-path establishment is configured, a remote/primary UE needs to be allowed to initiate or respond to discovery for multi-path establishment only when the RSRP of its serving cell is lower than the threshold. The process is limited by the configured multipath discovery threshold.

For another example, when the RSRP low threshold of the remote/primary UE used for multi-path establishment is configured, a remote UE/primary UE needs to be allowed to initiate or respond to multi-path establishment only when the RSRP of its serving cell is higher than the threshold. The discovery process is limited by the configured multi-path discovery threshold.

For another example, when the RSRP low and high thresholds of the remote UE/primary UE used for multi-path establishment are configured at the same time, a remote UE/primary UE needs to have an RSRP in its own serving cell that is higher than the low threshold and lower than the high threshold. Only under certain conditions are allowed to initiate or respond to the discovery process of multi-path establishment, that is, subject to the configured multi-path discovery threshold.

In this possible implementation, the second threshold information for the discovery process of multi-path establishment configured by the network side device for the first terminal can be used, so that dedicated threshold information can be configured for multi-path establishment to meet the requirements of multi-path establishment. specific needs.

(4) When the first terminal in the connected state receives the control signaling sent by the network side device, it performs a discovery process of the second terminal for the purpose of multipath establishment.

When a remote/primary UE is in the connected state, it is generally connected to the network through a direct link. The network side can use Radio Resource Control (Radio Resource Control, RRC) dedicated signaling to indicate whether to perform the multipath discovery process.

For example, the network can carry an explicit indication field in RRC dedicated signaling to indicate whether the UE is allowed to perform a multi-path discovery process. When this field exists or is configured, the UE is allowed to perform a multi-path related discovery process. When this domain does not exist or is deconfigured, the UE is not allowed to perform multipath-related discovery processes.

For another example, the network can use some other fields in the RRC dedicated signaling to implicitly indicate whether the UE is allowed to perform the multipath discovery process. For example, the network has configured PC5 related measurements, or the network has configured dedicated resources for multipath discovery or general discovery. Pool, etc., when the relevant domain exists or is configured, the UE is allowed to perform the multipath-related discovery process. When the relevant domain does not exist or is deconfigured, the UE is not allowed to perform the multipath-related discovery process.

In this possible implementation, the network side device can control the first terminal to perform a discovery process of the second terminal for the purpose of multipath establishment. For example, the network side device can control the first terminal according to the signal of the current direct path with the first terminal. Quality or service information currently executed by the first terminal, etc., determine whether the first terminal needs to establish multipath to improve communication reliability.

In a possible implementation, before S404, the first terminal can also report its first capability information with multi-path transmission. After receiving the reported information, the network side can send the control signaling to the first terminal. . Optionally, the network side allows control signaling only for UEs that are capable of supporting this function, and the multipath discovery process is not allowed in the connection state of other UEs. Through this possible implementation, the network side device can obtain the multi-path transmission capability of the first terminal, and then can control the first terminal to perform the discovery process when necessary.

In a possible implementation, before S404, the first terminal may report the requirement information that the first terminal has multi-path transmission, and after receiving the reported information, the network side may send the control signaling to the first terminal. Optionally, the reporting information reported by the UE may also include service information for multi-path transmission. Upon receiving the demand request, the network may decide whether to use control signaling to instruct the UE to perform the multi-path discovery process based on its own resources and algorithm conditions. Through this possible implementation, the network side device can obtain the multi-path transmission requirement of the first terminal, and then control the first terminal to perform the discovery process.

In a possible implementation, before S404, the first terminal can also send a measurement report to the network side device, so that the network side can decide whether to use control signaling to instruct the UE to perform the multipath discovery process based on the UE's measurement reporting situation. .

In one or more possible implementations, the discovery process performed by the first terminal is only used for the purpose of multi-path establishment. For example, relay UE/secondary UE can only initiate/respond to a discovery process for one purpose at a time, that is, a discovery process is either used for traditional relay link establishment or multi-path establishment, not at the same time. For another example, Remote UE/primary UE can only initiate/respond to a discovery process for one purpose at a time, that is, a discovery process is either used for traditional relay link establishment or multi-path establishment, not at the same time. Through this possible implementation, the first terminal can perform a corresponding discovery process for the purpose of multi-path establishment to meet the requirements of multi-path establishment.

In a possible implementation, the discovery process performed by the first terminal is also used for discovery for purposes other than multipath establishment. For example, Remote UE/primary UE can perform discovery processes for two or more purposes simultaneously in one process, that is, one discovery process is used for both traditional relay link establishment and multi-path establishment, and even a non-relay discovery process. . For another example, relay UE/secondary UE can simultaneously A discovery process for two or more purposes is performed at the same time, that is, a discovery process is used for both traditional relay link establishment and multi-path establishment, or even a non-relay discovery process. Through this possible implementation method, the first terminal can realize discovery of multiple purposes through one discovery process, thereby meeting the needs of multiple purposes.

In a possible implementation, the discovery-related message sent by the first terminal during the discovery process carries a comprehensive discovery code, where the comprehensive discovery code is used to indicate multiple purposes of the discovery process. That is, all purposes are identified through this comprehensive discovery code. Optionally, the comprehensive discovery code may include a comprehensive service code, through which multiple purposes of the discovery process and the service information targeted by the various purposes are indicated. Through this possible implementation, multiple purposes of the discovery process can be indicated through a comprehensive discovery code, so that the second terminal can determine whether to respond to the discovery process based on the multiple purposes.

In a possible implementation, the discovery-related message sent by the first terminal during the discovery process carries multiple identification codes, wherein each of the identification codes indicates a purpose of the discovery process. For example, it is found that related messages carry different explicit identification codes to indicate various purposes.

In a possible implementation, before the first terminal performs a discovery process of a second terminal for the purpose of multipath establishment, the method further includes: the first terminal determines a threshold corresponding to satisfying the other purposes. information. For example, each discovery purpose sets a corresponding threshold and is judged according to the threshold conditions of various discovery purposes. Only discovery purposes that meet the threshold requirements can proceed with the discovery process, such as relay link purposes, and/or multipath, and/ or non-relay discovery. Through this possible implementation, threshold information corresponding to various purposes can be set, so that the discovery process corresponding to the purpose can only be executed when the corresponding threshold is met.

Figure 4c shows another schematic flowchart of the terminal discovery method provided by the embodiment of the present application. The method 430 can be executed by the first terminal. In other words, the method may be performed by software or hardware installed on the first terminal. In method 430, the first terminal is a terminal that assists in establishing multipath. For example, the first terminal may serve as a relay UE or a secondary UE. The following mainly describes the implementation methods in method 430 that are different from method 410. The implementation methods described in method 410 are all applicable to method 430.

As shown in Figure 4c, the method mainly includes the following steps: S406, under predetermined circumstances, the first terminal performs a discovery process of the second terminal for the purpose of multi-path establishment, wherein the first terminal performs a discovery process during the discovery process. , sending a discovery-related message carrying third indication information, where the third indication information is used to indicate that the first terminal can assist in establishing multipath.

For example, the relay UE or the auxiliary UE performs the discovery process in order to assist in establishing multipath. During the discovery process, it initiates a discovery-related message carrying the third indication information, indicating that the first terminal performs the discovery process in order to assist in establishing multipath. process to distinguish the purpose of traditional relay link. The discovery-related messages include but are not limited to discovery initiation messages or discovery response messages.

In a possible implementation, the discovery-related message also carries fourth indication information, where the fourth indication information is used to indicate the type of service for which the multipath is established. The fourth indication information facilitates the second terminal to identify and determine whether the multipath transmission service can be provided for the second terminal, so that multipath can be established for a specific service type.

In a possible implementation, the third indication information includes a link service code. Use this link service code to Indicates the purpose of the discovery process. For example, the link service code may include a relay service code (Relay service code) to reuse the establishment of a traditional relay link, determine the second terminal identification and determine whether it can provide multi-path transmission services and traditional relay link services. it's the same. Alternatively, the link service code may also include a multi-path service code, which determines whether the second terminal can identify and determine whether it can provide multi-path transmission services according to multi-path transmission requirements.

In a possible implementation, when the first terminal assists the second terminal in establishing multipath, the first terminal performing a discovery process of the second terminal for the purpose of multipath establishment may include the following (1) to ( One of 4).

(1) When it is determined that it is necessary to perform a discovery process of the second terminal for the purpose of multipath establishment, the first terminal performs a discovery process of the second terminal for the purpose of multipath establishment.

For example, when the RSRP high and RSRP low thresholds of traditional relay UE discovery are not configured, a relay/secondary UE can initiate or respond to the multipath establishment discovery process at any time, that is, there is no threshold limit.

For another example, when the RSRP high and/or low thresholds of traditional relay UE discovery are configured, a relay/secondary UE can also initiate or respond to the discovery process of multi-path establishment at any time when necessary, that is, it is not subject to the traditional relay UE threshold. limits.

For another example, when the RSRP high/low threshold of the relay UE/secondary UE used for multi-path establishment is not configured, a relay/secondary UE can initiate or respond to the discovery process of multi-path establishment at any time, that is, there is no threshold limit.

Through this possible implementation, the first terminal can perform a discovery process for the purpose of multipath at any time when assistance is needed to establish multipath.

(2) When the first terminal is configured with the first threshold information and the RSRP of the serving cell of the first terminal meets the first threshold information, the first terminal performs multi-path establishment The discovery process of the second terminal for the purpose, wherein the first threshold information includes: the third highest RSRP threshold and/or the second lowest RSRP threshold of the first terminal performing the discovery process of the relay node as a relay terminal. .

For example, when the RSRP high and/or low thresholds of traditional relay UE discovery are configured, a relay UE/secondary UE needs to be allowed to initiate or respond to the discovery process of multi-path establishment only when the RSRP of its serving cell is lower than the high threshold. , that is, limited by the traditional relay UE high threshold.

For another example, when the RSRP high and low thresholds of traditional relay UE discovery are configured, a relay UE/secondary UE needs to be allowed to initiate or respond only when the RSRP of its serving cell is higher than the low threshold and the RSRP is lower than the high threshold. The discovery process of multi-path establishment is limited by both the low threshold and the high threshold of traditional relay UE.

For another example, when the RSRP high and/or low thresholds of traditional relay UE discovery are configured, a relay UE/secondary UE needs to be allowed to initiate or respond to multi-path establishment discovery only when the RSRP of its serving cell is higher than the low threshold. The process is limited by the traditional relay UE low threshold.

Through this possible implementation, the network-side device configured for the first terminal for discovery of the relay node can be reused. The first threshold information of the process is used to determine whether to execute the discovery process for the purpose of multi-path establishment, thereby reducing the configuration signaling of network-side devices.

(3) When the first terminal is configured with the second threshold information and the RSRP of the serving cell of the first terminal meets the second threshold information, the first terminal performs multi-path establishment For the purpose of the discovery process of the second terminal, the second threshold information includes: the fourth highest RSRP threshold of the discovery process performed by the first terminal for multi-path establishment and/or the first terminal performs the discovery process for multi-path establishment. The third lowest RSRP threshold for the discovery process.

For example, when the RSRP high threshold of relay UE/secondary UE used for multi-path establishment is configured, a relay UE/secondary UE needs to be allowed to initiate or respond to multi-path establishment only when the RSRP of its serving cell is lower than the threshold. The discovery process is limited by the configured multi-path discovery threshold.

For another example, when the RSRP low threshold of relay UE/secondary UE used for multi-path establishment is configured, a relay UE/secondary UE needs to be allowed to initiate or respond to multi-path only when the RSRP of its serving cell is higher than the threshold. The established discovery process is limited by the configured multipath discovery threshold.

For another example, when the RSRP low and high thresholds of relay UE/secondary UE used for multi-path establishment are configured at the same time, a relay UE/secondary UE also needs to have an RSRP higher than the low threshold and lower than the high threshold in its own serving cell. Only under certain conditions are allowed to initiate or respond to the discovery process of multi-path establishment, that is, subject to the configured multi-path discovery threshold.

In this possible implementation, the second threshold information for the discovery process of multi-path establishment configured by the network side device for the first terminal can be used, so that dedicated threshold information can be configured for multi-path establishment to meet the requirements of multi-path establishment. specific needs.

(4) When the first terminal in the connected state receives the control signaling sent by the network side device, it performs a discovery process of the first terminal for the purpose of multipath establishment.

In this possible implementation, the network side device can control the first terminal to perform a discovery process of the second terminal for the purpose of multipath establishment. For example, the network side device can control the first terminal according to the signal of the current direct path with the first terminal. Quality or service information currently executed by the first terminal, etc., determine whether the first terminal needs to establish multipath to improve communication reliability.

In a possible implementation, before the first terminal in the connected state receives the control signaling sent by the network side device, the method further includes: the first terminal sends the first terminal to the network side device. Two capability information, wherein the second capability information indicates that the first terminal has the capability of assisted multipath transmission, and/or the second capability information indicates that the load of the first terminal supports assisted multipath transmission. Through this possible implementation, the network-side device can learn that the first terminal has the capability of assisted multi-path transmission and/or the current load of the first terminal supports assisted multi-path transmission, thereby preventing the network-side device from controlling the inability to provide assisted multi-path transmission. The capability of path transmission and/or the current load does not support terminals assisting in multipath transmission to perform a discovery process for the purpose of multipath establishment.

In a possible implementation, before the first terminal in the connected state receives the control signaling sent by the network side device, the method further includes: the first terminal sending measurements to the network side device. Report. This allows the network side to decide whether to use control signaling to instruct the UE to perform multi-path discovery based on the UE's measurement reporting status. process.

In one or more possible implementations, the discovery process performed by the first terminal is only used for the purpose of multi-path establishment. For example, relay UE/secondary UE can only initiate/respond to a discovery process for one purpose at a time, that is, a discovery process is either used for traditional relay link establishment or multi-path establishment, not at the same time. For another example, Remote UE/primary UE can only initiate/respond to a discovery process for one purpose at a time. That is, a discovery process is either used for traditional relay link establishment or multi-path establishment, and cannot be used for traditional relay link establishment at the same time. Relay link establishment and multi-path establishment.

In a possible implementation, the discovery process performed by the first terminal is also used for discovery for purposes other than multipath establishment. For example, Remote UE/primary UE can perform discovery processes for two or more purposes simultaneously in one process, that is, one discovery process is used for both traditional relay link establishment and multi-path establishment, or even non-relay discovery process. . For another example, relay UE/secondary UE can perform discovery processes for two or more purposes simultaneously in one process, that is, one discovery process is used for both traditional relay link establishment and multi-path establishment, or even non-relay discovery process.

In a possible implementation, the discovery-related message sent by the first terminal during the discovery process carries a comprehensive discovery code, where the comprehensive discovery code is used to indicate multiple purposes of the discovery process. That is, all purposes are identified through this comprehensive discovery code. Optionally, the comprehensive discovery code may include a comprehensive service code, through which multiple purposes of the discovery process and the service information targeted by the various purposes are indicated.

In a possible implementation, the discovery-related message sent by the first terminal during the discovery process carries multiple identification codes, wherein each of the identification codes indicates a purpose of the discovery process. For example, it is found that related messages carry different explicit identification codes to indicate various purposes.

In a possible implementation, before the first terminal performs a discovery process of a second terminal for the purpose of multipath establishment, the method further includes: the first terminal determines a threshold corresponding to satisfying the other purposes. information. For example, each discovery purpose sets a corresponding threshold and is judged according to the threshold conditions of various discovery purposes. Only discovery purposes that meet the threshold requirements can proceed with the discovery process, such as relay link purposes, and/or multipath, and/ or non-relay discovery.

Through the technical solutions provided by the embodiments of this application, different methods or thresholds or direct network control are used to perform the discovery process of multi-path scenarios, which is different from the traditional relay link discovery. It supports the UE to establish multiple paths at the same time, so that it can transmit on multiple paths. Different or the same business data to improve communication performance in terms of reliability, throughput, etc.

Figure 5 shows another schematic flowchart of a terminal discovery method in an embodiment of the present application. The method 500 can be executed by a network-side device. In other words, the method may be executed by software or hardware installed on the network side device. As shown in Figure 5, the method may include the following steps.

S510: The network side device sends target information related to the discovery process to the first terminal, where the discovery process includes: a discovery process for the purpose of multi-path establishment;

The target information includes at least one of the following:

(1) First threshold information, wherein the first threshold information is used for the discovery process of the relay node and the discovery process for the purpose of multi-path establishment. The first threshold information is the same as the first threshold information in methods 410 to 430. For details, please refer to the description in methods 410 to 430, which will not be described again here.

(2) Second threshold information, wherein the second threshold information is used for the discovery process for the purpose of multi-path establishment. The second threshold information is the same as the second threshold information in methods 410 to 430. For details, reference can be made to the description in methods 410 to 430, which will not be described again here.

(3) Control signaling, wherein the control signaling instructs the first terminal to perform a discovery process of the second terminal for the purpose of multipath establishment. For example, the network side device sends control signaling to the first terminal in the connected state, where the control signaling instructs the first terminal to perform a discovery process of the second terminal for the purpose of multipath establishment. The control signaling is the same as the control signaling in methods 410 to 430. For details, please refer to the description in methods 410 to 430.

In this embodiment of the present application, the control signaling may include RRC dedicated signaling.

In a possible implementation, before the network side device sends control signaling to the first terminal in the connected state, the method may further include one of the following:

(1) The network side device receives the first capability information sent by the first terminal, wherein the first capability information indicates that the first terminal has the capability of multi-path transmission; the network side device receives the first capability information After receiving the information, the first terminal may be instructed through control signaling to perform a discovery process for the purpose of establishing multipath.

(2) The network side device receives the demand information sent by the first terminal, wherein the demand information indicates that the first terminal has a requirement for multi-path transmission; after receiving the demand information, the network side device can control The signaling instructs the first terminal to perform a discovery process for the purpose of establishing multipath.

Optionally, the requirement information may also include service information for multi-path transmission. Upon receiving the requirement information, the network may decide whether to use control signaling to instruct the UE to perform the multi-path discovery process based on its own resources and algorithm conditions.

(3) The network side device receives the second capability information sent by the first terminal, wherein the second capability information indicates that the first terminal has the ability to assist multi-path transmission, and/or the third The second capability information indicates that the load of the first terminal supports assisted multipath transmission. The network side device may send the control information to the first terminal having the capability of assisting multipath transmission.

Optionally, the second capability information may also include service information for multipath transmission. Upon receiving the requirement information, the network may decide whether to instruct the UE to perform the multipath discovery process through control signaling based on its own resources and algorithm conditions.

(4) The network side device determines to instruct the first terminal to perform a discovery process of the second terminal for the purpose of multipath establishment according to the measurement report sent by the first terminal.

In a possible implementation, the network side device instructs the first terminal to perform a discovery process of the second terminal for the purpose of multipath establishment through the first indication field or the second indication field of the control signaling, Wherein, the first indication field is used to indicate that the first terminal is allowed to perform a discovery process for the purpose of multipath establishment, and the second indication field is used to indicate configuration information related to multipath.

For example, the network side device can carry an explicit indication field in the RRC dedicated signaling to indicate whether the multipath discovery process is allowed. When this field exists or is configured, the UE allows the multipath related discovery process. When this field When it does not exist or is deconfigured, the UE is not allowed to perform multipath-related discovery processes.

Alternatively, the network side device can also use some other fields in the RRC dedicated signaling to implicitly indicate whether the UE is allowed to perform the multipath discovery process. For example, the network side device is configured with PC5 related measurements, the network is configured with multipath discovery or general discovery. Dedicated resource pools, etc. When the relevant domain exists or is configured, the UE is allowed to perform multi-path related discovery processes. When the relevant domain does not exist or is de-configured, the UE is not allowed to perform multi-path related discovery processes.

The technical solutions provided by the embodiments of the present application are described below by taking the multipath discovery threshold not configured (that is, the threshold used for the discovery process of multipath establishment), the multipath discovery threshold configured, and the network side controlling the discovery process of multipath establishment as examples. Be explained.

1. The multipath discovery threshold is not configured.

On the network side, according to the existing protocol, when the RSRP low/high threshold for relay to send discovery is configured or not configured, and the RSRP high threshold for remote UE to send discovery, a UE acts as a remote UE or relay UE and performs discovery for the purpose of relay link. The process will be carried out in accordance with the existing protocol procedures.

But when a UE needs to perform multi-path transmission as a remote UE/primary UE and needs to discover another UE, it can have at least one of the following behaviors that is different from the traditional remote UE.

(1) Remote UE/primary UE for the purpose of multi-path transmission, during the discovery process, carries explicit independent instructions to indicate that it is to establish multi-path to distinguish the purpose of traditional relay link, and can also carry multi-path Establish a targeted service type to facilitate the peer UE to identify and determine whether it can provide multi-path transmission services.

(2) Remote UE/primary UE for the purpose of multi-path transmission, during the discovery process, carries the traditional relay link service code to reuse the establishment of the traditional relay link. It is considered that the opposite end UE identifies and determines whether it can provide it with multiple The path transmission service is the same as the traditional service providing relay link.

(3) When the RSRP high threshold of traditional remote UE discovery is not configured, a remote UE/primary UE can initiate or respond to the discovery process of multi-path establishment at any time, that is, there is no threshold limit.

(4) When the RSRP high threshold of traditional remote UE discovery is configured, a remote UE/primary UE can also initiate or respond to the discovery process of multi-path establishment at any time when necessary, that is, it is not restricted by the traditional remote UE threshold.

(5) When the RSRP high threshold of traditional remote UE discovery is configured, a remote UE/primary UE also needs to be allowed to initiate or respond to the discovery process of multi-path establishment when the RSRP of its own serving cell is lower than the threshold, that is, it is subject to Limitations of traditional remote UE threshold.

(6) Remote UE/primary UE can only initiate/respond to a discovery process for one purpose at a time, that is, a discovery process is either used for traditional relay link establishment or multi-path establishment, not at the same time.

(7) Remote UE/primary UE can perform discovery processes for two or more purposes simultaneously in one process, that is, one discovery process is used for both traditional relay link establishment, multi-path establishment, and even non-relay The discovery process can carry a business identification code to identify all purposes at the same time, or carry different explicit identification codes for indication of respective purposes;

Optionally, each discovery purpose can be judged according to its corresponding threshold condition. Only discovery purposes that meet the threshold requirements can proceed with the discovery process, such as relay link purposes, and/or multipath, and/or non- relay found.

When a UE needs to serve as a Relay UE/Secondary UE to assist another UE in multi-path transmission, it can have at least one of the following behaviors that is different from the traditional relay UE.

(1) Relay UE/Secondary UE for the purpose of multi-path transmission carries explicit independent instructions during the discovery process, indicating that it can assist in establishing multi-path to distinguish the purpose of traditional relay link, and can also carry multiple The service type for which the path is established is convenient for the opposite end UE to identify and determine whether it needs the multi-path transmission service provided by it.

(2) Relay UE/Secondary UE for the purpose of multi-path transmission. During the discovery process, it carries the traditional relay link service code to reuse the establishment of the traditional relay link. It is considered that the opposite end UE identifies and determines whether it needs to provide multi-path The transmission service is the same as the traditional service providing relay link.

(3) When the RSRP high and RSRP low thresholds of traditional relay UE discovery are not configured, a Relay UE/Secondary UE can initiate or respond to the discovery process of multi-path establishment at any time, that is, there is no threshold limit.

(4) When the RSRP high and/or low thresholds of traditional relay UE discovery are configured, a Relay UE/Secondary UE can also initiate or respond to the discovery process of multi-path establishment at any time when necessary, that is, it is not affected by the traditional relay UE Threshold restrictions.

(5) When the RSRP high and/or low thresholds of traditional relay UE discovery are configured, a Relay UE/Secondary UE also needs to be allowed to initiate or respond to multipath establishment when the RSRP of its serving cell is lower than the high threshold. The discovery process is limited by the traditional relay UE high threshold.

(6) When the RSRP high and/or low thresholds of traditional relay UE discovery are configured, a Relay UE/Secondary UE also needs to be allowed to initiate or respond to multi-path establishment when the RSRP of its serving cell is higher than the low threshold. The discovery process is limited by the traditional relay UE low threshold.

(7) When the RSRP high and/or low thresholds of traditional relay UE discovery are configured, a Relay UE/Secondary UE also needs to be allowed when the RSRP of its serving cell is higher than the low threshold and the RSRP is lower than the high threshold. The discovery process that initiates or responds to multi-path establishment is subject to both the low threshold and the high threshold of traditional relay UE.

(8) When the RSRP high and/or low thresholds of traditional relay UE discovery are configured, a Relay UE/Secondary UE also needs to be allowed to initiate or respond to multi-path establishment when the RSRP of its serving cell is higher than the low threshold. The discovery process is limited by the traditional relay UE low threshold.

(9) Relay UE/Secondary UE can only initiate/respond to a discovery process for one purpose at a time, that is, a discovery process is either for traditional relay link establishment or multi-path establishment, not at the same time.

(10) Relay UE/Secondary UE can perform discovery processes for two or more purposes simultaneously in one process, that is, one discovery process is used for both traditional relay link establishment, multi-path establishment, and even non-relay discovery process. Carry one service identification code to identify all purposes simultaneously, or carry different explicit identification codes for indication of respective purposes.

Optionally, each discovery purpose is judged according to its corresponding threshold condition. Only discovery purposes that meet the threshold requirements can proceed with the discovery process, such as relay link purposes, and/or multipath, and/or non-relay. Discover.

2. Configure multi-path discovery threshold

The network side can also define, configure or not configure the RSRP low/high threshold for Relay UE/Secondary UE to send Discovery for multi-path establishment, and the RSRP low/high threshold for remote UE/primary UE to send Discovery for multi-path establishment.

If a UE wants to serve as a remote UE/primary UE and perform a discovery process for the purpose of multi-path establishment, it can perform at least one of the following actions.

(1) Remote UE/primary UE for the purpose of multi-path transmission, during the discovery process, carries explicit independent instructions to indicate that it is to establish multi-path to distinguish the purpose of traditional relay link, and can also carry multi-path Establish a targeted service type to facilitate the peer UE to identify and determine whether it can provide multi-path transmission services.

(2) Remote UE/primary UE for the purpose of multi-path transmission, during the discovery process, carries the traditional relay link service code to reuse the establishment of the traditional relay link. It is considered that the opposite end UE identifies and determines whether it can provide it with multiple The path transmission service is the same as the traditional service providing relay link.

(3) When the RSRP high/low threshold of the remote UE/primary UE used for multi-path establishment is not configured, a remote UE/primary UE can initiate or respond to the discovery process of multi-path establishment at any time, that is, there is no threshold limit.

(4) When the RSRP high threshold of remote UE/primary UE used for multi-path establishment is configured, a remote UE/primary UE also needs to be allowed to initiate or respond to multiple requests when the RSRP of its own serving cell is lower than the threshold. The discovery process of path establishment is limited by the configured multi-path discovery threshold.

(5) When the RSRP low threshold of remote UE/primary UE used for multi-path establishment is configured, a remote UE/primary UE also needs to be allowed to initiate or respond to multi-path when the RSRP of its own serving cell is higher than the threshold. The discovery process of path establishment is limited by the configured multi-path discovery threshold.

(6) When the RSRP low and high thresholds of the remote UE/primary UE used for multi-path establishment are configured at the same time, a remote UE/primary UE also needs to have the RSRP in its own serving cell higher than the low threshold and lower than the high threshold. Only under certain conditions are allowed to initiate or respond to the discovery process of multi-path establishment, that is, subject to the configured multi-path discovery threshold.

(7) Remote UE/primary UE can only initiate/respond to a discovery process for one purpose at a time, that is, a discovery process is either used for traditional relay link establishment or multi-path establishment, not at the same time.

(8) Remote UE/primary UE can perform discovery processes for two or more purposes simultaneously in one process, that is, one discovery process is used for both traditional relay link establishment, multi-path establishment, and even non-relay The discovery process can carry a service identification code to identify all purposes at the same time, or carry different explicit identification codes for indication of respective purposes.

Optionally, each discovery purpose is judged according to its corresponding threshold condition. Only discovery purposes that meet the threshold requirements can proceed with the discovery process, such as relay link purposes, and/or multipath, and/or non-relay. Discover.

If a UE wants to serve as a Relay UE/secondary UE and perform a discovery process for the purpose of multi-path establishment, it can perform at least one of the following actions.

(1) Relay UE/secondary UE for the purpose of multi-path transmission, during the discovery process, carries explicit independent instructions to indicate that it is to establish multi-path to distinguish the purpose of traditional relay link, and can also carry multi-path Establish a targeted service type to facilitate the peer UE to identify and determine whether it can provide multi-path transmission services.

(2) Relay UE/secondary UE for the purpose of multi-path transmission, during the discovery process, carries the traditional relay link service code to reuse the establishment of the traditional relay link. It is considered that the opposite end UE identifies and determines whether it can provide it with multiple The path transmission service is the same as the traditional service providing relay link.

(3) When the RSRP high/low threshold of the Relay UE/secondary UE used for multi-path establishment is not configured, a relay/secondary UE can initiate or respond to the discovery process of multi-path establishment at any time, that is, there is no threshold limit.

(4) When the RSRP high threshold of Relay UE/secondary UE used for multi-path establishment is configured, a relay/secondary UE also needs to be allowed to initiate or respond to multi-path when the RSRP of its own serving cell is lower than the threshold. The established discovery process is limited by the configured multipath discovery threshold.

(5) When the RSRP low threshold of Relay UE/secondary UE used for multi-path establishment is configured, a relay/secondary UE also needs to be allowed to initiate or respond to multi-path when the RSRP of its own serving cell is higher than the threshold. The established discovery process is limited by the configured multipath discovery threshold.

(6) When the RSRP low and high thresholds of the Relay UE/secondary UE used for multi-path establishment are configured at the same time, a Relay UE/secondary UE also needs to have an RSRP higher than the low threshold and lower than the high threshold in its own serving cell. Only under certain conditions are allowed to initiate or respond to the discovery process of multi-path establishment, that is, subject to the configured multi-path discovery threshold.

(7) Relay UE/secondary UE can only initiate/respond to a discovery process for one purpose at a time, that is, a discovery process is either used for traditional relay link establishment or multi-path establishment, not at the same time.

(8) Relay UE/secondary UE can perform discovery processes for two or more purposes simultaneously in one process, that is, one discovery process is used for both traditional relay link establishment, multi-path establishment, and even non-relay discovery process. Carry one service identification code to identify all purposes simultaneously, or carry different explicit identification codes for indication of respective purposes.

Optionally, each discovery purpose is judged according to its corresponding threshold condition. Only discovery purposes that meet the threshold requirements can proceed with the discovery process, such as relay link purposes, and/or multipath, and/or non-relay. Discover.

3. Network control

In the above one and two, the behavior of remote UE/primary UE or the behavior of relay/secondary UE can be Applicable to UEs in all RRC states, such as RRC Connected, RRC Inactive, and RRC Idle, or only to UEs in non-connected states, such as RRC Inactive UE or RRC Idle UE.

This embodiment introduces a discovery process for multi-path establishment under direct network control of a connected UE.

When a remote UE/primary UE is in the connected state, the network can control it to perform the multipath discovery process in at least one of the following ways.

(1) When a remote UE/primary UE is in the connected state, it is generally connected to the network through a direct link. The network side can indicate whether to perform the multipath discovery process through RRC dedicated signaling.

(2) The network can carry an explicit indication field in the RRC dedicated signaling to indicate whether the UE is allowed to perform the multi-path discovery process. When this field exists or is configured, the UE is allowed to perform the multi-path related discovery process. When this field When it does not exist or is deconfigured, the UE is not allowed to perform multipath-related discovery processes.

(3) The network can use some other fields in the RRC dedicated signaling to implicitly indicate whether the UE is allowed to perform the multipath discovery process. For example, the network is configured with PC5 related measurements, the network is configured with a dedicated resource pool for multipath discovery or general discovery, etc. , when the relevant domain exists or is configured, the UE is allowed to perform the multipath related discovery process. When the relevant domain does not exist or is deconfigured, the UE is not allowed to perform the multipath related discovery process.

(4) When the UE has the capability of multi-path transmission, it reports the capability to the network side. The network will only allow dedicated signaling for UEs that have the capability to support this function. The multi-path discovery process is not allowed in the connection state of other UEs.

(5) When the UE has a requirement for multi-path transmission, the UE reports the requirement to the network side, which may also include service information for multi-path transmission. When the network receives the requirement request, it can decide whether to use it based on its own resources and algorithm conditions. Dedicated signaling instructs the UE to perform the multipath discovery process.

(6) The network can also decide whether to use dedicated signaling to instruct the UE to perform the multi-path discovery process based on the UE's measurement reporting status.

When a relay UE/secondary UE is in the connected state, the network can control it to perform the multipath discovery process in the following ways:

(1) When a relay UE/secondary UE is in the connected state, it must be connected to the network through a direct link. The network side can indicate whether to perform the multipath discovery process through RRC dedicated signaling.

(2) The network can carry an explicit indication field in the RRC dedicated signaling to indicate whether the relay/secondary UE is allowed to perform the multi-path discovery process. When this field exists or is configured, the UE is allowed to perform the multi-path related discovery process. When this domain does not exist or is deconfigured, the UE is not allowed to perform multipath-related discovery procedures.

(3) The network can use some other fields in the RRC dedicated signaling to implicitly indicate whether the UE is allowed to perform the multipath discovery process. For example, the network is configured with PC5 related measurements, the network is configured with a dedicated resource pool for multipath discovery or general discovery, etc. , when the relevant domain exists or is configured, the UE is allowed to perform the multipath related discovery process. When the relevant domain does not exist or is deconfigured, the UE is not allowed to perform the multipath related discovery process.

(4) When a UE has the ability to assist other UEs in multi-path transmission, it reports this ability to the network side. The network will only allow dedicated signaling for UEs that are capable of supporting this function, and multi-path is not allowed in the connection state of other UEs. discovery process.

(5) When the current load of the UE supports assisted multi-path transmission, the UE reports the status or update to the network side, which may also include the service information for multi-path transmission. When the network receives the status or update, it can receive the status or update according to its own resources and Algorithm conditions determine whether to use dedicated signaling to instruct the UE to perform the multipath discovery process.

(6) The network can also decide whether to use dedicated signaling to instruct the UE to perform the multi-path discovery process based on the UE's measurement reporting status.

For the terminal discovery method provided by the embodiment of the present application, the execution subject may be a terminal discovery device. In the embodiment of the present application, the terminal discovery device executing the terminal discovery method is used as an example to illustrate the terminal discovery device provided by the embodiment of the present application.

Figure 6 shows a schematic structural diagram of a terminal discovery device provided by an embodiment of the present application. As shown in Figure 6, the device 600 mainly includes: a first determination module 601 and an execution module 602.

In the embodiment of the present application, the first determination module 601 is used to determine that predetermined conditions are met; the execution module 602 is used to execute the discovery process of the second terminal for the purpose of multi-path establishment.

In a possible implementation, the predetermined situation includes one of the following:

Determine the need to perform a discovery process for the second terminal for the purpose of multipath establishment;

determining first threshold information that satisfies a discovery process for the relay node;

determining second threshold information that satisfies a discovery process for multipath establishment;

In the connected state, control signaling sent by the network side device is received, wherein the control signaling instructs to perform a discovery process of the second terminal for the purpose of multipath establishment.

In a possible implementation, the execution module 602 is further configured to perform at least one of the following: sending first capability information to the network side device, wherein the first capability information indicates that the first terminal has multi-path transmission capability; sending requirement information to the network side device, where the requirement information indicates that the first terminal has a requirement for multi-path transmission; sending a measurement report to the network side device.

In a possible implementation, the execution module 602 executes a discovery process of the second terminal for the purpose of multi-path establishment, including:

During the discovery process, a discovery-related message carrying first indication information is sent, where the first indication information is used to instruct the discovery process to be performed in order to establish multipath.

In a possible implementation, the execution module 602 executes a discovery process of the second terminal for the purpose of multi-path establishment, including one of the following:

When it is determined that it is necessary to perform a discovery process of the second terminal for the purpose of multipath establishment, perform a discovery process of the second terminal for the purpose of multipath establishment;

In the case where the first threshold information is configured and the reference signal received power RSRP of the serving cell satisfies the first threshold information, a discovery process of the second terminal for the purpose of multipath establishment is performed, wherein the first a threshold letter The information includes: the first highest RSRP threshold as the remote terminal performs the discovery process of the relay node;

In the case where the second threshold information is configured and the RSRP of the serving cell satisfies the second threshold information, a discovery process of the second terminal for the purpose of multipath establishment is performed, wherein the second threshold information includes : The second highest RSRP threshold for performing the discovery process for multipath establishment and/or the first lowest RSRP threshold for performing the discovery process for multipath establishment;

When in the connected state, upon receiving the control signaling sent by the network side device, a discovery process of the second terminal for the purpose of multipath establishment is performed.

In a possible implementation, the execution module 602 is also configured to execute at least one of the following:

Send second capability information to the network side device, wherein the second capability information indicates that the first terminal has the capability of assisting multipath transmission, and/or the second capability information indicates the load of the first terminal Support auxiliary multipath transmission;

Send measurement reports to network-side devices.

In a possible implementation, the execution module 602 executes a discovery process of the second terminal for the purpose of multi-path establishment, including:

During the discovery process, a discovery-related message carrying third indication information is sent, where the third indication information is used to indicate that multipath establishment can be assisted.

In a possible implementation, the execution module 602 executes a discovery process of the second terminal for the purpose of multi-path establishment, including one of the following:

When it is determined that it is necessary to perform a discovery process of the second terminal for the purpose of multipath establishment, perform a discovery process of the second terminal for the purpose of multipath establishment;

In the case where the first threshold information is configured and the RSRP of the serving cell satisfies the first threshold information, a discovery process of the second terminal for the purpose of multipath establishment is performed, wherein the first threshold information includes : The third highest RSRP threshold and/or the second lowest RSRP threshold as the relay terminal performs the discovery process of the relay node;

In the case where the second threshold information is configured and the RSRP of the serving cell satisfies the second threshold information, a discovery process of the second terminal for the purpose of multipath establishment is performed, wherein the second threshold information includes : The fourth highest RSRP threshold for performing the discovery process for multipath establishment and/or the third lowest RSRP threshold for performing the discovery process for multipath establishment;

When in the connected state, upon receiving the control signaling sent by the network side device, a discovery process of the first terminal for the purpose of multipath establishment is performed.

In one possible implementation, the discovery process is only used for multipath establishment purposes.

In a possible implementation, the discovery process is also used for discovery for purposes other than multipath establishment.

In a possible implementation, the discovery-related message sent during the discovery process carries a comprehensive discovery code, where the comprehensive discovery code is used to indicate multiple purposes of the discovery process.

In a possible implementation, the discovery-related message sent by the execution module 602 during the discovery process carries multiple identification codes, wherein each of the identification codes indicates a purpose of the discovery process.

In a possible implementation, the execution module 602 is also configured to determine, by the first terminal, corresponding threshold information that satisfies the other purposes before executing a discovery process of the second terminal for the purpose of multipath establishment.

In a possible implementation, the execution module 602 executes a discovery process of the second terminal for the purpose of multi-path establishment, including:

Send a first discovery message, wherein the first discovery message is used to initiate a discovery process of the second terminal for the purpose of multipath establishment; or,

Send a discovery response message, wherein the discovery response message is used to respond to the received second discovery message, and the second discovery message is used to initiate a discovery process for the purpose of multipath establishment.

The terminal discovery device in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or may be a component in the electronic device, such as an integrated circuit or chip. The electronic device may be a terminal or other devices other than the terminal. For example, terminals may include but are not limited to the types of terminals 11 listed above, and other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., which are not specifically limited in the embodiment of this application.

The terminal discovery device provided by the embodiment of the present application can implement each process implemented by the first terminal of the method embodiment in Figures 4a to 5, and achieve the same technical effect. To avoid duplication, the details will not be described here.

Figure 7 shows another schematic structural diagram of a terminal discovery device provided by an embodiment of the present application. As shown in Figure 7, the device 700 mainly includes: a second determination module 701 and a transceiver module 702.

In the application embodiment, the second determination module 701 is used to determine target information related to the discovery process, wherein the discovery process includes: a discovery process for the purpose of multi-path establishment; the target information includes at least one of the following : first threshold information, wherein the first threshold information is used for the discovery process of relay nodes and the discovery process for the purpose of multi-path establishment; second threshold information, wherein the second threshold information is used for multi-path establishment. A discovery process for the purpose of path establishment; control signaling, wherein the control signaling instructs the first terminal to perform a discovery process of the second terminal for the purpose of multi-path establishment; the transceiver module 702 is used to send the first terminal Send the target information.

In a possible implementation, the transceiver module 702 is also used for one of the following:

Receive first capability information sent by the first terminal, wherein the first capability information indicates that the first terminal has the capability of multi-path transmission;

Receive requirement information sent by the first terminal, wherein the requirement information indicates that the first terminal has a requirement for multi-path transmission;

Receive second capability information sent by the first terminal, wherein the second capability information indicates that the first terminal has the capability of assisting multipath transmission, and/or the second capability information indicates that the first The terminal's load supports assisted multipath transmission;

According to the measurement report sent by the first terminal, it is determined to instruct the first terminal to perform a discovery process of the second terminal for the purpose of multi-path establishment.

The terminal discovery device provided by the embodiment of the present application can implement each process implemented by the network side or network side device of the method embodiment in Figures 4a to 5, and achieve the same technical effect. To avoid duplication, details will not be described here.

Optionally, as shown in Figure 8, this embodiment of the present application also provides a communication device 800, which includes a processor 801 and a memory 802. The memory 802 stores programs or instructions that can be run on the processor 801, for example. , when the communication device 800 is a terminal, when the program or instruction is executed by the processor 801, each step of the terminal discovery method embodiment is implemented, and the same technical effect can be achieved. When the communication device 800 is a network-side device, when the program or instruction is executed by the processor 801, each step of the terminal discovery method embodiment is implemented, and the same technical effect can be achieved. To avoid duplication, the details will not be repeated here.

An embodiment of the present application also provides a terminal, which includes a processor and a communication interface. The processor is used to implement each step of the terminal discovery method embodiment, and the communication interface is used to communicate with an external device. This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment. Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this terminal embodiment, and can achieve the same technical effect. Specifically, FIG. 9 is a schematic diagram of the hardware structure of a terminal that implements an embodiment of the present application.

The terminal 900 includes but is not limited to: a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909, a processor 910, etc. At least some parts.

Those skilled in the art can understand that the terminal 900 may also include a power supply (such as a battery) that supplies power to various components. The power supply may be logically connected to the processor 910 through a power management system, thereby managing charging, discharging, and power consumption through the power management system. Management and other functions. The terminal structure shown in FIG. 9 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or may combine certain components, or arrange different components, which will not be described again here.

It should be understood that in the embodiment of the present application, the input unit 904 may include a graphics processor (Graphics Processing Unit, GPU) 9041 and a microphone 9042. The graphics processor 9041 is responsible for the image capture device (GPU) in the video capture mode or the image capture mode. Process the image data of still pictures or videos obtained by cameras (such as cameras). The display unit 906 may include a display panel 9061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 907 includes a touch panel 9071 and at least one of other input devices 9072 . Touch panel 9071, also known as touch screen. The touch panel 9071 may include two parts: a touch detection device and a touch controller. Other input devices 9072 may include but are not limited to physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be described again here.

In this embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 901 can transmit it to the processor 910 for processing; in addition, the radio frequency unit 901 can send uplink data to the network side device. Generally, the radio frequency unit 901 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

Memory 909 may be used to store software programs or instructions as well as various data. The memory 909 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, Image playback function, etc.) etc. Additionally, memory 909 may include volatile memory or nonvolatile memory, or memory 909 may include both volatile and nonvolatile memory. Among them, the non-volatile memory can be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (Random Access Memory, RAM), static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) and Direct Rambus RAM (DRRAM). Memory 909 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

The processor 910 may include one or more processing units; optionally, the processor 910 integrates an application processor and a modem processor, where the application processor mainly handles operations related to the operating system, user interface, application programs, etc., Modem processors mainly process wireless communication signals, such as baseband processors. It can be understood that the above modem processor may not be integrated into the processor 910.

The processor 910 is configured to perform a discovery process of the second terminal for the purpose of multi-path establishment under predetermined circumstances.

An embodiment of the present application also provides a network-side device, including a processor and a communication interface. The processor is used to implement each step of the above terminal discovery method embodiment, and the communication interface is used to communicate with an external device. This network-side device embodiment corresponds to the above-mentioned network-side device method embodiment. Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this network-side device embodiment, and can achieve the same technical effect.

Specifically, the embodiment of the present application also provides a network side device. As shown in Figure 10, the network side device 1000 includes: an antenna 1001, a radio frequency device 1002, a baseband device 1003, a processor 1004 and a memory 1005. Antenna 1001 is connected to radio frequency device 1002. In the uplink direction, the radio frequency device 1002 receives information through the antenna 1001 and sends the received information to the baseband device 1003 for processing. In the downlink direction, the baseband device 1003 processes the information to be sent and sends it to the radio frequency device 1002. The radio frequency device 1002 processes the received information and sends it out through the antenna 1001.

The method performed by the network side device in the above embodiment can be implemented in the baseband device 1003, which includes a baseband processor.

The baseband device 1003 may include, for example, at least one baseband board on which multiple chips are disposed, as shown in FIG. Program to perform the network device operations shown in the above method embodiments.

The network side device may also include a network interface 1006, which is, for example, a common public radio interface (CPRI).

Specifically, the network side device 1000 in this embodiment of the present invention also includes: instructions or programs stored in the memory 1005 and executable on the processor 1004. The processor 1004 calls the instructions or programs in the memory 1005 to execute each of the steps shown in Figure 7 The method of module execution and achieving the same technical effect will not be described in detail here to avoid duplication.

Embodiments of the present application also provide a readable storage medium, where programs or instructions are stored on the readable storage medium. When the program or instruction is executed by the processor, each process of the terminal discovery method 400 or 500 embodiment is implemented, and the same technical effect can be achieved. To avoid duplication, the details will not be repeated here.

Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disk or optical disk, etc.

An embodiment of the present application further provides a chip. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the above terminal discovery method 400 or Each process of the 500 embodiment can achieve the same technical effect. To avoid repetition, it will not be described again here.

It should be understood that the chips mentioned in the embodiments of this application may also be called system-on-chip, system-on-a-chip, system-on-chip or system-on-chip, etc.

Embodiments of the present application further provide a computer program/program product. The computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement the above terminal discovery method 400. or 500 embodiments, and can achieve the same technical effect. To avoid repetition, they will not be described again here.

Embodiments of the present application also provide a terminal discovery system, including: a terminal and a network side device. The terminal can be used to perform the steps of the terminal discovery method 400 as described above. The network side device can be used to perform the above steps. The steps of the terminal discovery method 500 described above.

It should be noted that, in this document, the terms "comprising", "comprises" or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or device that includes a series of elements not only includes those elements, It also includes other elements not expressly listed or inherent in the process, method, article or apparatus. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article or apparatus that includes that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions may be performed, for example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation. Based on this understanding, the technical solution of the present application can be embodied in the form of a computer software product that is essentially or contributes to the existing technology. The computer software product is stored in a storage medium (such as ROM/RAM, disk , CD), including several instructions to cause a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of this application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Inspired by this application, many forms can be made without departing from the purpose of this application and the scope protected by the claims, all of which fall within the protection of this application.

Claims (37)

1. A terminal discovery method includes:

   Under predetermined circumstances, the first terminal performs a discovery process of the second terminal for the purpose of multipath establishment.
2. The method of claim 1, wherein the predetermined situation includes one of the following:

   The first terminal determines that it is necessary to perform a discovery process of the second terminal for the purpose of multipath establishment;

   The first terminal determines that first threshold information is satisfied for the discovery process of the relay node;

   The first terminal determines second threshold information that satisfies the discovery process for multi-path establishment;

   The first terminal receives control signaling sent by the network side device in the connected state, wherein the control signaling instructs the first terminal to perform a discovery process of the second terminal for the purpose of multipath establishment.
3. The method according to claim 2, wherein the first terminal performs a discovery process of the second terminal for the purpose of multi-path establishment, including:

   During the discovery process, the first terminal sends a discovery-related message carrying first indication information, where the first indication information is used to indicate that the first terminal performs the discovery process in order to establish multipath. .
4. The method according to claim 3, wherein the discovery-related message further carries second indication information, and the second indication information is used to indicate a service type for which multipath is established.
5. The method of claim 3, wherein the first indication information includes a link service code.
6. The method according to any one of claims 3 to 5, wherein, under predetermined circumstances, the first terminal performs a discovery process of the second terminal for the purpose of multipath establishment, including one of the following:

   When it is determined that it is necessary to perform a discovery process of the second terminal for the purpose of multipath establishment, the first terminal performs a discovery process of the second terminal for the purpose of multipath establishment;

   In the case where the first terminal is configured with the first threshold information and the reference signal received power RSRP of the serving cell of the first terminal satisfies the first threshold information, the first terminal executes multipath Establish a discovery process of the second terminal for the purpose, wherein the first threshold information includes: the first highest RSRP threshold for the first terminal as a remote terminal to perform the discovery process of the relay node;

   In the case where the first terminal is configured with the second threshold information and the RSRP of the serving cell of the first terminal meets the second threshold information, the first terminal performs multipath establishment for the purpose of The discovery process of the second terminal, wherein the second threshold information includes: the second highest RSRP threshold for the first terminal to perform the discovery process for multi-path establishment and/or the first terminal to perform the discovery process for multi-path establishment. The first lowest RSRP threshold;

   When the first terminal in the connected state receives the control signaling sent by the network side device, the first terminal performs a discovery process of the second terminal for the purpose of multipath establishment.
7. The method according to claim 6, wherein before the first terminal in the connected state receives the control signaling sent by the network side device, the method further includes at least one of the following:

   The first terminal sends first capability information to the network side device, wherein the first capability information indicates that the first terminal has the capability of multi-path transmission;

   The first terminal sends demand information to the network side device, wherein the demand information indicates that the first terminal has The need for multi-path transmission;

   The first terminal sends a measurement report to the network side device.
8. The method according to claim 2, wherein the first terminal performs a discovery process of the second terminal for the purpose of multi-path establishment, including:

   During the discovery process, the first terminal sends a discovery-related message carrying third indication information, where the third indication information is used to indicate that the first terminal can assist in establishing multipath.
9. The method according to claim 8, wherein the discovery related message further carries fourth indication information, and the fourth indication information is used to indicate a service type for establishing multipath.
10. The method of claim 8, wherein the third indication information includes a link service code.
11. The method according to any one of claims 8 to 10, wherein, under predetermined circumstances, the first terminal performs a discovery process of the second terminal for the purpose of multipath establishment, including one of the following:

    When it is determined that it is necessary to perform a discovery process of the second terminal for the purpose of multipath establishment, the first terminal performs a discovery process of the second terminal for the purpose of multipath establishment;

    In the case where the first terminal is configured with the first threshold information and the RSRP of the serving cell of the first terminal satisfies the first threshold information, the first terminal performs multipath establishment for the purpose. The discovery process of the second terminal, wherein the first threshold information includes: the third highest RSRP threshold and/or the second lowest RSRP threshold of the first terminal performing the discovery process of the relay node as a relay terminal;

    In the case where the first terminal is configured with the second threshold information and the RSRP of the serving cell of the first terminal meets the second threshold information, the first terminal performs multipath establishment for the purpose of The discovery process of the second terminal, wherein the second threshold information includes: the fourth highest RSRP threshold when the first terminal performs the discovery process for multi-path establishment and/or the first terminal performs the discovery process for multi-path establishment. The third lowest RSRP threshold;

    When the first terminal in the connected state receives the control signaling sent by the network side device, the first terminal performs a discovery process of the first terminal for the purpose of multi-path establishment.
12. The method according to claim 11, wherein before the first terminal in the connected state receives the control signaling sent by the network side device, the method further includes at least one of the following:

    The first terminal sends second capability information to the network side device, wherein the second capability information indicates that the first terminal has the capability of assisting multi-path transmission, and/or the second capability information indicates that the The load of the first terminal supports assisted multipath transmission;

    The first terminal sends a measurement report to the network side device.
13. The method according to any one of claims 1 to 12, wherein the discovery process performed by the first terminal is only used for the purpose of multi-path establishment.
14. The method according to any one of claims 1 to 12, wherein the discovery process performed by the first terminal is also used for discovery for purposes other than multipath establishment.
15. The method according to claim 14, wherein the discovery-related message sent by the first terminal during the discovery process carries a comprehensive discovery code, wherein the comprehensive discovery code is used to indicate multiple aspects of the discovery process. kind of purpose.
16. The method of claim 14, wherein the discovery-related message sent by the first terminal during the discovery process carries multiple identification codes, wherein each of the identification codes indicates a step of the discovery process. kind of purpose.
17. The method according to claim 14, wherein before the first terminal performs a discovery process of the second terminal for the purpose of multi-path establishment, the method further includes: the first terminal determines that the other purposes are met. Corresponding threshold information.
18. The method according to any one of claims 1 to 17, wherein the first terminal performs a discovery process of the second terminal for the purpose of multi-path establishment, including:

    The first terminal sends a first discovery message, wherein the first discovery message is used to initiate a discovery process of the second terminal for the purpose of multipath establishment; or,

    The first terminal sends a discovery response message, wherein the discovery response message is used to respond to the received second discovery message, and the second discovery message is used to initiate a discovery process for the purpose of multipath establishment.
19. A terminal discovery device, including:

    The first determination module is used to determine that the predetermined situation is met;

    The execution module is used to execute the discovery process of the second terminal for the purpose of multi-path establishment.
20. The device of claim 19, wherein the predetermined situation includes one of the following:

    Determine the need to perform a discovery process for the second terminal for the purpose of multipath establishment;

    determining first threshold information that satisfies a discovery process for the relay node;

    determining second threshold information that satisfies a discovery process for multipath establishment;

    In the connected state, control signaling sent by the network side device is received, wherein the control signaling instructs to perform a discovery process of the second terminal for the purpose of multipath establishment.
21. The device according to claim 20, wherein the execution module performs a discovery process of the second terminal for the purpose of multi-path establishment, including:

    During the discovery process, a discovery-related message carrying first indication information is sent, where the first indication information is used to instruct the discovery process to be performed in order to establish multipath.
22. The device according to claim 21, wherein the execution module performs a discovery process of the second terminal for the purpose of multi-path establishment, including one of the following:

    When it is determined that it is necessary to perform a discovery process of the second terminal for the purpose of multipath establishment, perform a discovery process of the second terminal for the purpose of multipath establishment;

    In the case where the first threshold information is configured and the reference signal received power RSRP of the serving cell satisfies the first threshold information, a discovery process of the second terminal for the purpose of multipath establishment is performed, wherein the first One threshold information includes: the first highest RSRP threshold used as the remote terminal to perform the discovery process of the relay node;

    In the case where the second threshold information is configured and the RSRP of the serving cell satisfies the second threshold information, a discovery process of the second terminal for the purpose of multipath establishment is performed, wherein the second threshold information includes : The second highest RSRP threshold for performing the discovery process for multipath establishment and/or the first lowest RSRP threshold for performing the discovery process for multipath establishment;

    When in the connected state, upon receiving the control signaling sent by the network side device, a discovery process of the second terminal for the purpose of multipath establishment is performed.
23. The device according to claim 20, wherein the execution module performs a discovery process of the second terminal for the purpose of multi-path establishment, including:

    During the discovery process, a discovery-related message carrying third indication information is sent, where the third indication information is used to indicate that multipath establishment can be assisted.
24. The device according to claim 23, wherein the execution module performs a discovery process of the second terminal for the purpose of multi-path establishment, including one of the following:

    When it is determined that it is necessary to perform a discovery process of the second terminal for the purpose of multipath establishment, perform a discovery process of the second terminal for the purpose of multipath establishment;

    In the case where the first threshold information is configured and the RSRP of the serving cell satisfies the first threshold information, a discovery process of the second terminal for the purpose of multipath establishment is performed, wherein the first threshold information includes : The third highest RSRP threshold and/or the second lowest RSRP threshold as the relay terminal performs the discovery process of the relay node;

    In the case where the second threshold information is configured and the RSRP of the serving cell satisfies the second threshold information, a discovery process of the second terminal for the purpose of multipath establishment is performed, wherein the second threshold information includes : The fourth highest RSRP threshold for performing the discovery process for multipath establishment and/or the third lowest RSRP threshold for performing the discovery process for multipath establishment;

    When in the connected state, upon receiving the control signaling sent by the network side device, a discovery process of the first terminal for the purpose of multipath establishment is performed.
25. An apparatus according to any one of claims 19 to 24, wherein said discovery process is used only for the purpose of multi-path establishment.
26. The apparatus according to any one of claims 19 to 24, wherein the discovery process is also used for discovery for purposes other than multipath establishment.
27. The apparatus of claim 25, wherein the discovery-related message sent during the discovery process carries a comprehensive discovery code, wherein the comprehensive discovery code is used to indicate multiple purposes of the discovery process.
28. The device according to claim 26, wherein the discovery-related message sent by the execution module during the discovery process carries multiple identification codes, wherein each of the identification codes indicates a type of the discovery process. Purpose.
29. The apparatus according to claim 26, wherein the execution module is further configured to determine, by the first terminal, corresponding threshold information that satisfies the other purposes before executing a discovery process of the second terminal for the purpose of multipath establishment. .
30. The device according to any one of claims 19 to 29, wherein the execution module performs a discovery process of the second terminal for the purpose of multi-path establishment, including:

    Send a first discovery message, wherein the first discovery message is used to initiate a discovery process of the second terminal for the purpose of multipath establishment; or,

    Send a discovery response message, wherein the discovery response message is used to respond to the received second discovery message, and the second discovery message is used to initiate a discovery process for the purpose of multipath establishment.
31. A terminal discovery method includes:

    The network side device sends target information related to the discovery process to the first terminal, where the discovery process includes: a discovery process for the purpose of multi-path establishment;

    The target information includes at least one of the following:

    First threshold information, wherein the first threshold information is used for the discovery process of relay nodes and the discovery process for the purpose of multi-path establishment;

    Second threshold information, wherein the second threshold information is used for the discovery process for the purpose of multi-path establishment;

    Control signaling, wherein the control signaling instructs the first terminal to perform a discovery process of the second terminal for the purpose of multipath establishment.
32. The method according to claim 31, wherein before the network side device sends control signaling to the first terminal, the method further includes one of the following:

    The network side device receives the first capability information sent by the first terminal, wherein the first capability information indicates that the first terminal has the capability of multi-path transmission;

    The network side device receives demand information sent by the first terminal, wherein the demand information indicates that the first terminal has a multi-path transmission requirement;

    The network side device receives the second capability information sent by the first terminal, wherein the second capability information indicates that the first terminal has the capability of assisting multi-path transmission, and/or the second capability information Instructing the load of the first terminal to support assisted multipath transmission;

    The network side device determines to instruct the first terminal to perform a discovery process of the second terminal for the purpose of multipath establishment according to the measurement report sent by the first terminal.
33. The method according to claim 31, wherein the network side device instructs the first terminal to perform multi-path establishment for the purpose of the second terminal through the first indication field or the second indication field of the control signaling. A discovery process, wherein the first indication field is used to indicate that the first terminal is allowed to perform a discovery process for the purpose of multipath establishment, and the second indication field is used to indicate configuration information related to multipath.
34. A terminal discovery device, including:

    The second determination module is used to determine target information related to the discovery process, wherein the discovery process includes: a discovery process for the purpose of multi-path establishment; the target information includes at least one of the following: first threshold information, where , the first threshold information is used for the discovery process of the relay node and the discovery process for the purpose of multi-path establishment; the second threshold information, wherein the second threshold information is used for the discovery process for the purpose of multi-path establishment. ; Control signaling, wherein the control signaling instructs the first terminal to perform a discovery process of the second terminal for the purpose of multi-path establishment; a transceiver module, configured to send the target information to the first terminal.
35. A terminal, including a processor and a memory. The memory stores programs or instructions that can be run on the processor. When the programs or instructions are executed by the processor, the implementation of any one of claims 1 to 18 is achieved. The steps of the terminal discovery method described above.
36. A network-side device includes a processor and a memory, and the memory stores data that can be run on the processor. A program or instruction that, when executed by the processor, implements the steps of the terminal discovery method according to any one of claims 31 to 33.
37. A readable storage medium that stores programs or instructions that, when executed by a processor, implement the steps of the terminal discovery method according to any one of claims 1 to 18, or The steps of implementing the terminal discovery method according to any one of claims 31 to 33.