WO2023185841A1

WO2023185841A1 - Method and apparatus for selecting relay user equipment, and user equipment and storage medium

Info

Publication number: WO2023185841A1
Application number: PCT/CN2023/084386
Authority: WO
Inventors: 张奕忠; 王文
Original assignee: 维沃移动通信有限公司
Priority date: 2022-03-29
Filing date: 2023-03-28
Publication date: 2023-10-05
Also published as: CN116939553A

Abstract

The present application belongs to the technical field of communications. Disclosed are a method and apparatus for selecting a relay user equipment, and a user equipment and a storage medium. The method for selecting a relay user equipment in the embodiments of the present application comprises: when a remote user equipment fails to establish a relay connection for a proximity-based service, executing a first operation, wherein the first operation comprises at least one of the following: starting a first timer, wherein the first timer is used for timing the related process of establishing the relay connection; and on the basis of a first number of times, stopping a discovery process for a relay user equipment executing the proximity-based service, wherein the first number of times is the maximum number of failures, which is allowed by the remote user equipment, in establishing a relay connection.

Description

Relay terminal selection method, device, terminal and storage medium

Cross-references to related applications

This application claims priority to Chinese Patent Application No. 202210323854.8 filed in China on March 29, 2022, the entire content of which is incorporated herein by reference.

Technical field

The present application belongs to the field of communication technology, and specifically relates to a relay terminal selection method, device, terminal and storage medium.

Background technique

Proximity-based Services (ProSe), as a short-distance direct communication technology, is the name of the business that implements Device-to-Device (D2D) communication technology. Direct communication between devices reduces the load on service base stations. ProSe is combined with the fifth generation mobile communication technology (5th Generation Mobile Communication Technology, 5G) to propose a 5G-supported ProSe architecture that supports PC5-based terminal direct discovery function, as well as three types of unicast, broadcast and group-level communication Direct communication capabilities, while supporting single-hop relay through the terminal to the network and PC5/Uu path selection policy.

In the ProSe scenario, the terminal (User Equipment, UE) determines whether to use the layer 3 (L3) relay service according to the UE Route Selection Policy (URSP). When using the layer 3 relay service, it passes the 5G ProSe layer 3 terminal to network relay terminal (layer-3UE-to-network relay UE) relays the UE's data to the network. At this time, the terminal is also called a 5G layer 3 remote terminal (layer-3remote UE). Currently, the terminal determines whether to use the L3 relay service based on the URSP. When establishing a relay connection based on the Layer 3 relay fails, the existing technology has not yet clarified the solution for the above situation, so it may affect the transmission of the terminal data, causing the terminal to Data transmission reliability is relatively poor.

Contents of the invention

Embodiments of the present application provide a relay terminal selection method, device, terminal and storage medium. It provides a solution for the remote terminal when the relay connection of the short-range communication service cannot be established, which is beneficial to improving the data transmission reliability of the terminal.

In the first aspect, a relay terminal selection method is provided, which method includes:

When the remote terminal fails to establish a relay connection for the short-range communication service, it performs a first operation, wherein the first operation includes at least one of the following:

Start a first timer, the first timer is used to time the relevant process of establishing the relay connection;

Stop performing the discovery process of the relay terminal of the near-field communication service based on the first number, which is the maximum number of failures allowed by the remote terminal to fail to establish a relay connection.

In the second aspect, a relay terminal selection device is provided, including:

The first processing module is configured to perform a first operation when the relay connection of the near-field communication service of the remote terminal fails to be established, wherein the first operation includes at least one of the following:

In a third 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.

In a fourth aspect, a terminal is provided, including a processor and a communication interface, wherein the processor is configured to perform the first operation when the relay connection of the short-range communication service fails to be established, wherein the third operation An operation includes at least one of the following:

In a fifth aspect, a system for selecting a relay terminal is provided, including: a terminal and a network side device. The terminal may be configured to perform the steps of the method for selecting a relay terminal as described in the first aspect.

In a sixth 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.

In a seventh 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 first party's The steps of the method described above.

In an eighth 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 the method described in the first aspect Method steps.

In this embodiment of the present application, when the remote terminal fails to establish a relay connection for the short-range communication service, it performs a first operation, wherein the first operation includes at least one of the following: starting a first timer, The first timer is used to time the relevant process of establishing the relay connection; based on the first time, the discovery process of the relay terminal of the short-range communication service is stopped based on the first time, the first time is the number allowed by the remote terminal. The maximum number of failures to establish a relay connection. In this way, the embodiments of the present application provide a solution for the remote terminal when the relay connection of the short-range communication service cannot be established, which is beneficial to improving the data transmission reliability of the terminal.

Description of drawings

Figure 1 is a block diagram of a wireless communication system applicable to the embodiment of the present application;

Figure 2 is a block diagram of another wireless communication system to which the embodiment of the present application is applicable;

Figure 3 is a flow chart of a relay terminal selection method provided by an embodiment of the present application;

Figure 4 is a schematic structural diagram of a relay terminal selection device provided by an embodiment of the present application;

Figure 5 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

Figure 6 is a schematic structural diagram of a terminal 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 Usually one type, The number of objects is not limited. For example, the first object may 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 access network equipment or core network equipment, where, Access network equipment may also be called radio access network equipment, radio access network (Radio Access Network, RAN), radio access network function or radio access network unit. Access network equipment may include a base station, a Wireless Local Area Network (WLAN) access point or a WiFi node, etc. The base station may be called a Node B, an Evolved Node B (eNB), an access point, a base transceiver station ( Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home B-node, home evolved B-node, transmitting and receiving point ( Transmitting Receiving Point (TRP) or some other appropriate terminology in the field, as long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiment of this application, only in the NR system The base station is introduced as an example, and the specific type of base station is not limited.

Figure 2 is a schematic diagram of a scenario that supports the UE-to-Network Relay mechanism in NR. The remote terminal (Remote UE) needs to transmit data with the network side, but due to poor coverage, the relay terminal cannot be found. (Relay UE) is the relay, where the Uu interface is between the relay terminal and the base station, and the sidelink (PC5) interface is between the relay terminal and the remote terminal.

In the existing technology, when the application layer has service data that needs to be sent by the terminal, the terminal first needs to match the URSP. Usually each terminal is configured with a certain number of URSPs. Each URSP rule includes 3 parts: (1) Priority information; (2) Traffic Descriptor (TD); (3) Routing description Descriptor (Route selection descriptor, RSD). Usually, the terminal first matches the URSP rule with the highest priority (Rule Precedence=1). In the URSP rule with the highest priority, if the TD matches the description of the current service (traffic), the terminal continues to match the RSD. Each RSD also includes a priority. The terminal continues matching according to the priority of the RSD, and then establishes a protocol data unit (Protocol Data Unit, PDU) session corresponding to the parameters based on the matched RSD parameters.

In the ProSe scenario, the remote terminal determines whether to use the L3 relay service according to the URSP, that is, whether to relay the remote terminal through the 5G ProSe layer-3 UE-to-network relay UE. The terminal's data is provided to the network. At this time, the remote terminal can also be called a 5G layer-3 remote terminal (5G layer-3remote UE).

In the prior art, the logic for the remote terminal to match the URSP and use the L3 relay service is: (1) Confirm whether the TD matches the application information; (2) Find the highest priority RSD that has not been matched in the RSD Match; (3) When matching according to RSD priority, if the current (highest level) RSD contains an offload indication, and the remote terminal is authorized as a layer 3 remote terminal (L3remote UE), Then the remote terminal instructs the upper layer to stop selecting the next RSD.

The above matching logic has the following problems: when the remote terminal cannot find a suitable 5G ProSe UE-to-Network layer-3relay UE (for example, the terminal to network (UE to Network, U2N) relay discovery (discoevry) process fails, Or, the U2N relay selection process fails, or there is no suitable L3U2N relay UE near the remote terminal), the remote terminal may be unable to transmit the data that needs to be transmitted. Possible reasons for the inability to transmit data are: the remote terminal There is no suitable L3 relay terminal nearby, and the remote terminal repeatedly performs the discovery process of the L3 relay terminal but always fails.

The following is a detailed description of the relay terminal selection method, device, terminal and storage medium provided by the embodiments of the present application through some embodiments and application scenarios with reference to the accompanying drawings.

In this embodiment of the present application, the remote terminal can discover the Layer 3 relay terminal by executing a discovery process of the Layer 3 ProSe based relay terminal. Further, after discovering the layer 3 relay terminal, the remote terminal can establish a PC5 connection with the layer 3 relay terminal, thereby establishing a relay connection from the remote terminal to the network based on the layer 3 relay terminal. When the PC5 connection with the layer 3 relay terminal fails to be established, the discovery process of the relay terminal based on the layer 3 ProSe service and the establishment of the PC5 connection with the layer 3 relay terminal can be repeated. The relay connection from the terminal to the network based on the layer 3 relay terminal is sometimes also referred to as the relay connection based on the layer 3 relay terminal.

In the embodiment of the present application, the remote terminal can discover the relay terminal of Layer 2 by executing a discovery process of the relay terminal based on the Layer 2 near-field communication service. Further, after discovering the layer 2 relay terminal, the remote terminal can establish a PC5 connection with the layer 2 relay terminal, thereby establishing a relay connection from the remote terminal to the network based on the layer 2 relay terminal. The relay connection from the terminal to the network based on the layer 2 relay terminal is sometimes also referred to as the relay connection based on the layer 2 relay terminal. When the PC5 connection with the layer 2 relay terminal fails to be established, the process of discovering the relay terminal based on the layer 2 ProSe service and establishing the PC5 connection with the layer 2 relay terminal can be repeated.

In the embodiment of the present application, the discovery process of a relay terminal that performs a near-field communication service may include: performing a discovery process of a relay terminal that performs a layer-2-based near-field communication service, and/or performing a layer-3-based near-field communication process. The discovery process of service relay terminals. Relay connections for near field communication services may include A terminal-to-network relay connection based on a layer 3 relay terminal, and/or a terminal-to-network relay connection based on a layer 2 relay terminal.

Please refer to Figure 3. Figure 3 is a flow chart of a relay terminal selection method provided by an embodiment of the present application. The method is executed by a remote terminal. As shown in Figure 3, the method includes the following steps:

Step 301: If the remote terminal fails to establish a relay connection for the short-range communication service, perform a first operation, where the first operation includes at least one of the following:

In the embodiment of the present application, the remote terminal can discover the relay terminal by executing the discovery process of the relay terminal of the short-range communication service, and then establish the PC5 connection with the relay terminal to establish the short-range communication service. Relay connection. The relay connection of the short-range communication service may include: a relay connection from a terminal to the network based on a layer 3 relay terminal, and/or a relay connection from a terminal to the network based on a layer 2 relay terminal. When the remote terminal fails to establish a relay connection of the near field communication service, the remote terminal performs the first operation: for example, starting a first timer to perform a related process for establishing a relay connection. The related process for establishing a relay connection may specifically include a discovery process of a relay terminal based on layer 2/layer 3 short-range communication services, establishing a PC5 connection with a layer 2/layer 3 relay terminal, etc. Process; for another example, the remote terminal can count the number of failures in establishing the relay connection during the process of establishing the relay connection of the short-range communication service. When the number of failures reaches the first number, the execution stops. Discovery process of relay terminals for short-range communication services.

Through the above steps, the embodiment of the present application provides a processing solution for the remote terminal when it fails to establish a relay connection for the short-range communication service. The remote terminal can stop executing the short-range communication based on the first timer or the first count. The discovery process of the relay terminal of the communication service, so that the remote terminal can subsequently try to establish a relay connection to the network by executing other processes, which is beneficial to improving the reliability of terminal data transmission.

In this embodiment of the present application, the first timer may include a layer 3 timer, and the layer 3 timer is specifically used to time related processes of establishing a relay connection based on a layer 3 relay terminal. The related process of establishing a relay connection based on the layer 3 relay terminal may specifically include: performing a discovery process of the relay terminal based on the layer 3 short-range communication service, establishing a PC5 connection with the layer 3 relay terminal, and after establishing the When the PC5 connection fails, the discovery process of the relay terminal based on the layer 3 short-range communication service is re-executed. After the layer 3 timer expires, the remote terminal may stop performing the discovery process of the relay terminal based on the layer 3 short-range communication service.

In this embodiment of the present application, the first timer may include a layer 2 timer, and the layer 2 timer is specifically used to time related processes of establishing a relay connection based on a layer 2 relay terminal. The relevant process of establishing a relay connection based on the layer 2 relay terminal may specifically include: performing a discovery process of the relay terminal based on the layer 2 near field communication service, establishing a PC5 connection with the layer 2 relay terminal, and establishing the When the PC5 connection fails, the discovery process of the relay terminal based on the Layer 2 short-range communication service is re-executed, etc. After the layer 2 timer expires, the remote terminal may stop performing the discovery process of the relay terminal based on the layer 2 near field communication service.

The above implementation methods provide specific timing methods for layer 3 and layer 2 timers respectively, so that after the timer expires, relevant operations can be triggered to avoid or reduce the impact on terminal data transmission caused by staying in the discovery process for a long time. adverse effects, thereby improving the reliability of terminal data transmission.

In this embodiment of the present application, the first number includes a layer 3 threshold, and the layer 3 threshold is the maximum number of failures allowed by the remote terminal to establish a relay connection based on the layer 3 relay terminal. When the number of failures to establish a relay connection based on a Layer 3 relay terminal reaches the Layer 3 threshold, the remote terminal stops performing the discovery process of the relay terminal of the near-field communication service. Specifically, it stops The discovery process of the relay terminal based on the Layer 3 near field communication service is performed.

In this embodiment of the present application, the first number includes a layer 2 threshold, and the layer 2 threshold is the maximum number of failures allowed by the remote terminal to establish a relay connection based on the layer 2 relay terminal. When the number of failures to establish a relay connection based on a Layer 2 relay terminal reaches the Layer 2 threshold, the remote terminal stops performing the discovery process of the relay terminal of the near-field communication service. Specifically, it stops The discovery process of the relay terminal of the Layer 2 based near field communication service is performed.

The above embodiment provides layer 3 and layer 2 thresholds respectively for the first number, thereby providing an implementation method for ending the discovery process for layer 3/layer 2 relay terminals, so that the terminal can stop the discovery process in a timely manner. Avoid or reduce the adverse impact on terminal data transmission caused by staying in the discovery process for a long time, thereby improving the reliability of terminal data transmission.

Optionally, the expiration time and/or the first time number of the first timer is that the remote terminal can Determined based on at least one of the following:

1) The hardware capabilities of the remote terminal.

For example, when the hardware capability of the remote terminal is strong, the expiration time of the first timer/first timer can be set larger. On the contrary, when the hardware capability is weak, the expiration time of the first time/first timer can be set larger. The expiration time of a timer can be set smaller.

2) The service type of the remote terminal.

For example, in the embodiment of the present application, the corresponding first time number/first timer expiration time can be set in advance for different service types, and then the currently adopted first time number/first timer is determined according to the specific service type. expiry time.

3) Quality of Service (QoS) requirements of the remote terminal.

For example, when the QoS demand of the remote terminal is high, the expiration time of the first timer/first timer can be set smaller. On the contrary, when the QoS demand is low, the first time/expiration time of the first timer can be set smaller. The expiration time of a timer can be set larger.

4) Parameter policy information related to short-range services in the remote terminal.

For example, relevant parameter policy information can be configured for short-range services, such as delay requirements, reliability requirements and other indicators. Then, based on the parameter policy information related to short-range services, the first number/first timer is determined. Expire date.

The above implementation method sets the first number or the expiration time of the first timer according to factors such as the remote terminal's own hardware capabilities, service type, QoS requirements or parameter policy information related to short-range services, so that the first timer expiration time can be set according to the above factors. , flexibly adjust the first number or the expiration time of the first timer to meet the needs of different terminals, business types or strategies.

In one embodiment, the remote terminal (eg, announcing UE, Announcing UE) may stop the announcing UE (announcement UE) process for terminal-to-network relay discovery to save power consumption. For example, the maximum number of UEs or a timer can be set, and the aforementioned UE announcement process can be stopped when the maximum number of UEs or the timer times out.

In one implementation, when the remote terminal matches one or more URSPs, it may trigger the relay discovery process. If the PC5 connection fails to be established, the next RSD will be matched.

As an optional implementation manner, in the above step 301, when the relay connection of the short-range communication service includes a terminal-to-network relay connection based on a layer 3 relay terminal, the remote terminal The first operation performed may also include at least one of the following:

1) Starting from the highest priority URSP rule, match the URSP rules again.

In the event that a relay connection based on the Layer 3 relay terminal fails to be established, the remote terminal can re-match the URSP rules to re-determine whether to use the L3 relay service. For example, since it usually takes a certain amount of time to establish a relay connection for short-range communication services, when the previous relay connection failed to be established, because a period of time has passed, the location or channel environment of the remote terminal or relay terminal may have changed. changes so the URSP rules can be rematched to continue trying to establish a relay connection.

2) Execute the discovery process of the relay terminal based on the layer 2 near field communication service.

If a relay connection based on a Layer 3 relay terminal fails to be established, it means that there may not be a qualified Layer 3 relay terminal around the current remote terminal. Therefore, the remote terminal can also try to establish a Layer 3 relay connection based on the Layer 2 relay terminal. relay connection to the terminal. At this time, the remote terminal can perform a discovery process of the relay terminal based on the layer 2 near field communication service to discover the layer 2 relay terminal. Further, after discovering the layer 2 relay terminal, the remote terminal can also establish a PC5 connection with the layer 2 relay terminal.

3) Establish a PC5 connection with the layer 2 relay terminal.

In some cases, the remote terminal may have identified its surrounding Layer 2 relay terminals. At this time, the remote terminal does not need to perform the discovery process of relay terminals based on Layer 2 near-field communication services. A PC5 connection is established directly with the layer 2 relay terminal.

Through the above steps, the embodiment of the present application can re-match the URSP rules when establishing a relay connection based on the layer 3 relay terminal, or establish a relay connection based on the layer 2 relay terminal to establish the relay as soon as possible. connection to ensure data transmission from the remote terminal.

As another optional implementation manner, in the above step 301, when the relay connection of the near-field communication service includes a terminal-to-network relay connection based on a Layer 2 relay terminal, the remote terminal executes The first operation may also include at least one of the following:

1) Execute the discovery process of the relay terminal based on the layer 3 near field communication service.

If a relay connection based on a layer 2 relay terminal fails to be established, it means that there may not be a qualified layer 2 relay terminal around the current remote terminal. Therefore, the remote terminal can also try to establish a relay connection based on a layer 3 relay terminal. relay connection to the terminal. At this time, the remote terminal can perform a discovery process of the relay terminal based on the layer 3 near field communication service to discover the layer 3 relay terminal. Further, after discovering the layer 3 relay terminal, the remote terminal can also establish a PC5 connection with the layer 3 relay terminal.

2) Establish a PC5 connection with the layer 3 relay terminal.

Similarly, in some cases, the remote terminal may have identified its surrounding Layer 3 relay terminals. At this time, the remote terminal no longer needs to perform discovery of relay terminals based on Layer 3 short-range communication services. process, but directly establishes a PC5 connection with the layer 3 relay terminal.

Through the above steps, the embodiment of the present application can try to establish a relay connection based on the layer 3 relay terminal when establishing a relay connection based on the layer 2 relay terminal, so as to establish the relay connection as soon as possible and ensure that the remote terminal data transmission.

In the above step 301, when the remote terminal fails to establish a relay connection of the short-range communication service, it may include: the remote terminal fails to perform the second operation. Specifically, the second operation may include at least one of the following:

a) Discovery process of relay terminals that perform short-range communication services.

Here, the discovery process of the relay terminal that performs the near-field communication service may specifically include: the discovery process of the relay terminal that performs the near-field communication service based on layer 3, and/or the discovery process of the relay terminal that performs the near-field communication service based on layer 2. Discovery process of relay terminals. The above process fails. Specifically, the discovery process may be executed but the relay terminal cannot be discovered.

b) Select the relay terminal for the near field communication service.

Here, selecting a relay terminal for the near-field communication service may include: selecting a layer 2 relay terminal for the near-field communication service, and/or selecting a layer 3 relay terminal for the near-field communication service. The selection of the relay terminal fails. Specifically, although there is a relay terminal, the relay terminal that meets the preset conditions cannot be selected.

c) Establish a PC5 connection with the relay terminal of the near field communication service.

Here, establishing a PC5 connection with the relay terminal of the near field communication service may include: establishing a PC5 connection with the layer 3 relay terminal of the near field communication service, and/or establishing a PC5 connection with the layer 2 relay terminal of the near field communication service. PC5 connection. PC5 connection establishment failed. Specifically, the remote terminal sent a connection establishment request message, but the request message was rejected, or the connection response message from the relay terminal failed to be received.

d) Activate the PC5 connection with the relay terminal of the near field communication service.

Here, when a PC5 connection has been connected between the remote terminal and the layer 2 or layer 3 relay terminal, the remote terminal can activate the PC5 connection to activate the relay connection of the remote terminal to the network. If the activation request is rejected, or no response is received, the activation can be considered failed.

In this embodiment of the present application, before step 301, the method may further include: the remote terminal successfully matches the first RSD of the first URSP rule. For example, when the remote terminal needs to send data of a certain service at its application layer, it will match the URSP rules in order of priority. When the matched TD in the first URSP rule matches the description of the service, the remote terminal continues to match each RSD under the first URSP rule in the order of priority of the RSDs. It is assumed that the first RSD includes a short-distance layer 3 terminal. To the network relay offload indication (5G ProSe layer-3 UE-to-network relay offload indication), and the remote terminal is authorized as a layer 3 remote terminal (L3 remote UE), it is determined that the first URSP is successfully matched. The first RSD of the rules. At this time, the remote terminal can perform a discovery process of a relay terminal based on the layer 3 near-field communication service according to the parameters of the first RSD to establish a relay connection of the near-field communication service.

In this embodiment of the present application, after performing the first operation in step 301, the remote terminal may also perform a third operation based on the first condition. Wherein, the first condition may specifically include at least one of the following:

1) The discovery process of the relay terminal of the short-range communication service failed;

2) The PC5 connection with the relay terminal failed to be established;

3) The first timer expires;

4) The number of failures allowed by the remote terminal to establish a relay connection reaches the first number;

The third operation includes at least one of the following:

1) Starting from the highest priority UE routing policy URSP rule, rematch the URSP rules;

2) Match the second RSD whose RSD priority is equal to or lower than the first RSD;

3) Match a second URSP whose URSP priority is equal to or lower than the first URSP.

That is to say, after performing the first operation of step 301, the remote terminal determines whether the first condition is met, and if so, performs the above third operation, thereby continuing to match the URSP rules or the RSDs therein, so as to Establish a relay connection with the layer 3 relay terminal to realize the service data transmission of the remote terminal and ensure the reliability of data transmission of the remote terminal.

For the relay terminal selection method provided by the embodiments of the present application, the execution subject may be a relay terminal selection device. In the embodiment of the present application, the selection device of the relay terminal performs the selection method of the relay terminal as an example to illustrate the selection device of the relay terminal provided by the embodiment of the present application.

Please refer to Figure 4. Figure 4 is a schematic structural diagram of a relay terminal selection device provided by an embodiment of the present application. This device can be applied to a remote terminal. As shown in Figure 4, the relay terminal selection device 400 include:

The first processing module 401 is configured to perform a first operation when the relay connection of the near-field communication service of the remote terminal fails to be established, wherein the first operation includes at least one of the following:

Optionally, the first timer includes a Layer 3 timer, and the first processing module is also configured to stop the remote terminal from executing Layer 3-based close range processing after the Layer 3 timer expires. Discovery process of relay terminals for communication services.

Optionally, the first timer includes a layer 2 timer, and the first processing module is also configured to, after the layer 2 timer expires, the remote terminal stop executing layer 2-based close range Discovery process of relay terminals for communication services.

Optionally, the first number includes a layer 3 threshold, and the first processing module is also configured to stop the discovery process of relay terminals that perform short-range communication services after reaching the layer 3 threshold;

Wherein, the layer 3 threshold is a maximum value of the number of failures allowed by the remote terminal to establish a relay connection based on the layer 3 relay terminal.

Optionally, the first number includes a layer 2 threshold, and the first processing module is also configured to stop the discovery process of the relay terminal executing the short-range communication service after reaching the layer 2 threshold. The layer 2 threshold It is the maximum value of the number of failures allowed by the remote terminal to establish a relay connection based on the layer 2 relay terminal.

Optionally, the relay connection of the near field communication service includes at least one of the following:

Terminal-to-network relay connections based on layer 2 relay terminals;

Terminal-to-network relay connections based on Layer 3 relay terminals.

Optionally, in the case where the relay connection of the near field communication service includes a terminal-to-network relay connection based on a Layer 3 relay terminal, the first operation further includes at least one of the following:

Starting from the highest priority UE routing policy URSP rule, rematch the URSP rules;

Execute the discovery process of relay terminals based on layer 2 short-range communication services;

Establish a PC5 connection with the layer 2 trunk terminal.

Optionally, in the case where the relay connection of the near field communication service includes a terminal-to-network relay connection based on a Layer 2 relay terminal, the first operation further includes at least one of the following:

Execute the discovery process of relay terminals based on layer 3 short-range communication services;

Establish a PC5 connection with the layer 3 trunk terminal.

Optionally, the remote terminal fails to establish a relay connection for the near field communication service, including:

The remote terminal fails to perform the second operation;

Wherein, the second operation includes at least one of the following:

The discovery process of relay terminals that perform short-range communication services;

Select the relay terminal for the near field communication service;

Establish a PC5 connection with the relay terminal of the near field communication service;

Activate the PC5 connection with the relay terminal of the near field communication service.

Optionally, the device also includes:

A matching module, configured to successfully match the first routing descriptor RSD of the first URSP rule before the remote terminal fails to establish a relay connection of the short-range communication service.

Optionally, the device also includes:

a second processing module, configured to perform a third operation based on the first condition after performing the first operation;

Wherein, the first condition includes at least one of the following:

The discovery process of the relay terminal of the near field communication service failed;

The PC5 connection establishment with the relay terminal failed;

The first timer expires;

The number of failures allowed by the remote terminal to establish a relay connection reaches the first number;

Wherein, the third operation includes at least one of the following:

Match a second RSD whose RSD priority is equal to or lower than the first RSD;

Match a second URSP whose URSP priority is equal to or lower than the first URSP.

Optionally, the expiration time and/or the first time number of the first timer are determined by the remote terminal according to at least one of the following:

The hardware capabilities of the remote terminal;

The service type of the remote terminal;

The QoS requirements of the remote terminal;

Parameter policy information related to short-range services in the remote terminal.

The above-mentioned relay terminal selection device provides a solution for the remote terminal when the relay connection of the short-range communication service cannot be established, which is beneficial to improving the data transmission reliability of the terminal.

The selection device 30 of the relay terminal 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 listed above, and other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., which are not specifically limited in the embodiments of this application.

The relay terminal selection device provided by the embodiment of the present application can implement each process implemented by the method embodiment in Figure 3 and achieve the same technical effect. To avoid duplication, the details will not be described here.

Optionally, as shown in Figure 5, this embodiment of the present application also provides a communication device 50, which includes a processor 51 and a memory 52. The memory 52 stores programs or instructions that can be run on the processor 51, such as , when the communication device 50 is a terminal, when the program or instruction is executed by the processor 51, each step of the above relay terminal selection method embodiment is implemented, and the same technical effect can be achieved. When the communication device 50 is a network-side device, when the program or instruction is executed by the processor 51, the steps of the above relay terminal selection method embodiment are implemented, and the same technical effect can be achieved. To avoid duplication, they will not be described again here. .

An embodiment of the present application also provides a terminal, including a processor and a communication interface. The processor is configured to perform a first operation when the relay connection of the near field communication service of the terminal fails to be established, wherein the third operation An operation includes at least one of the following: starting a first timer, the first timer is used to time the related process of establishing the relay connection; based on the first time, stopping the discovery process of the relay terminal of the short-range communication service , the first number is the maximum number of failures allowed by the terminal to establish a relay connection. This terminal embodiment corresponds to the above-mentioned remote terminal side method embodiment. Each implementation process and implementation method of the above-mentioned method embodiment can be applied to this terminal embodiment, and can achieve Same technical effect.

Specifically, FIG. 6 is a schematic diagram of the hardware structure of a terminal (remote terminal) that implements an embodiment of the present application.

The terminal 600 includes but is not limited to: a radio frequency unit 601, a network module 602, an audio output unit 603, an input unit 604, a sensor 605, a display unit 606, a user input unit 607, an interface unit 608, a memory 609, a processor 610, etc. At least some parts.

Those skilled in the art can understand that the terminal 600 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 610 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. 6 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or some components may be combined or arranged differently, which will not be described again here.

It should be understood that in the embodiment of the present application, the input unit 604 may include a graphics processing unit (Graphics Processing Unit, GPU) 6041 and a microphone 6042. The graphics processor 6041 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 606 may include a display panel 6061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 607 includes a touch panel 6071 and at least one of other input devices 6072 . Touch panel 6071, also called touch screen. The touch panel 6071 may include two parts: a touch detection device and a touch controller. Other input devices 6072 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 601 can transmit it to the processor 610 for processing; in addition, the radio frequency unit 601 can send uplink data to the network side device. Generally, the radio frequency unit 601 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

Memory 609 may be used to store software programs or instructions as well as various data. The memory 609 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 609 may include volatile memory or non-volatile memory, or memory 609 may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory. Erase 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 (Synch link DRAM) , SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DRRAM). Memory 609 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

The processor 610 may include one or more processing units; optionally, the processor 610 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 610.

The processor 610 is configured to perform a first operation when the relay connection of the near field communication service fails to be established, wherein the first operation includes at least one of the following:

Stop performing the discovery process of the relay terminal of the short-range communication service based on the first number, which is the maximum number of failures allowed by the terminal to fail to establish a relay connection.

The above-mentioned terminal realizes a solution when the relay connection of the short-range communication service cannot be established, which is conducive to improving the data transmission reliability of the terminal.

Optionally, the first timer includes a layer 3 timer, and the processor 610 is also configured to, after the layer 3 timer expires, the remote terminal stop executing the near field communication service based on layer 3. Discovery process of relay terminals.

Optionally, the first timer includes a layer 2 timer, and the processor 610 is also configured to, after the layer 2 timer expires, the remote terminal stop executing the layer 2 based short distance communication service. Discovery process of relay terminals.

Optionally, the first number includes a layer 3 threshold, and the processor 610 is also used to After the threshold, the discovery process of the relay terminal that performs the short-range communication service is stopped;

Optionally, the first number includes a layer 2 threshold, and the processor 610 is also configured to stop the discovery process of the relay terminal performing the near field communication service after reaching the layer 2 threshold, where the layer 2 threshold is the The maximum number of failures allowed by the remote terminal to establish a relay connection based on the layer 2 relay terminal.

Terminal-to-network relay connections based on layer 2 relay terminals;

Terminal-to-network relay connections based on Layer 3 relay terminals.

Establish a PC5 connection with the layer 2 trunk terminal.

Establish a PC5 connection with the layer 3 trunk terminal.

The remote terminal fails to perform the second operation;

Wherein, the second operation includes at least one of the following:

Select the relay terminal for the near field communication service;

Optionally, the processor 610 is also configured to successfully match the first routing descriptor RSD of the first URSP rule before the remote terminal fails to establish a relay connection of the short-range communication service.

Optionally, the processor 610 is also configured to, after performing the first operation, based on the first condition, Perform third operation;

Wherein, the first condition includes at least one of the following:

The PC5 connection establishment with the relay terminal failed;

The first timer expires;

Wherein, the third operation includes at least one of the following:

Match a second RSD whose RSD priority is equal to or lower than the first RSD;

The hardware capabilities of the remote terminal;

The service type of the remote terminal;

The QoS requirements of the remote terminal;

Embodiments of the present application also provide a readable storage medium, the readable storage medium stores a program or instructions, and when the program or instructions are executed by a processor, each process of the above-mentioned relay terminal selection method embodiment is implemented, and can achieve the same technical effect, so to avoid repetition, we will not repeat them here.

Wherein, the processor is the processor in the remote 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 relay terminal selection method. Each process of the embodiment can achieve the same technical effect, so 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. The computer program/program product is executed by at least one processor to implement the selection of the above relay terminal. Each process of the method embodiment can achieve the same technical effect, so to avoid repetition, it will not be described again here.

An embodiment of the present application further provides a terminal configured to perform the steps of the above relay terminal selection method embodiment.

Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered to be beyond the scope of this disclosure.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.

In the embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in various embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

If the functions described are implemented in the form of software functional units and sold or used as independent products can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present disclosure is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present disclosure. The aforementioned storage media include: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by controlling relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. The program can be stored in a computer-readable storage medium. During execution, the process may include the processes of the embodiments of each of the above methods. Wherein, the storage medium can be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM), etc.

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 make a terminal (can be a mobile phone, computer, server server, air conditioner, or network device, etc.) to perform 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

A method for selecting relay terminals, including:

When the remote terminal fails to establish a relay connection for the short-range communication service, it performs a first operation, wherein the first operation includes at least one of the following:

Start a first timer, the first timer is used to time the relevant process of establishing the relay connection;

Stop performing the discovery process of the relay terminal of the near-field communication service based on the first number, which is the maximum number of failures allowed by the remote terminal to fail to establish a relay connection.
The method of claim 1, wherein the first timer includes a layer 3 timer, wherein after the layer 3 timer expires, the remote terminal stops executing the layer 3 based near field communication service. Discovery process of relay terminals.
The method of claim 1, wherein the first timer includes a layer 2 timer, wherein after the layer 2 timer expires, the remote terminal stops executing the layer 2 based near field communication service. Discovery process of relay terminals.
The method of claim 1, wherein the first number includes a layer 3 threshold, wherein the remote terminal stops performing the discovery process of the relay terminal of the near field communication service after reaching the layer 3 threshold;

Wherein, the layer 3 threshold is a maximum value of the number of failures allowed by the remote terminal to establish a relay connection based on the layer 3 relay terminal.
The method of claim 1, wherein the first number includes a layer 2 threshold, wherein the remote terminal stops performing the discovery process of the relay terminal of the near field communication service after reaching the layer 2 threshold, and the layer The 2 threshold is the maximum number of failures allowed by the remote terminal to establish a relay connection based on the layer 2 relay terminal.
The method according to claim 1, wherein the relay connection of the near field communication service includes at least one of the following:

Terminal-to-network relay connections based on layer 2 relay terminals;

Terminal-to-network relay connections based on Layer 3 relay terminals.
The method of claim 6, wherein in the case where the relay connection of the near field communication service includes a terminal-to-network relay connection based on a layer 3 relay terminal, the first operation further includes the following: At least one:

Starting from the highest priority UE routing policy URSP rule, rematch the URSP rules;

Execute the discovery process of relay terminals based on layer 2 short-range communication services;

Establish a PC5 connection with the layer 2 trunk terminal.
The method of claim 6, wherein in the case where the relay connection of the near field communication service includes a terminal-to-network relay connection based on a layer 2 relay terminal, the first operation further includes the following: At least one:

Execute the discovery process of relay terminals based on layer 3 short-range communication services;

Establish a PC5 connection with the layer 3 trunk terminal.
The method according to any one of claims 1 to 8, wherein the remote terminal fails to establish a relay connection of the near field communication service, including:

The remote terminal fails to perform the second operation;

Wherein, the second operation includes at least one of the following:

The discovery process of relay terminals that perform short-range communication services;

Select the relay terminal for the near field communication service;

Establish a PC5 connection with the relay terminal of the near field communication service;

Activate the PC5 connection with the relay terminal of the near field communication service.
The method according to any one of claims 1 to 9, wherein before the remote terminal fails to establish a relay connection of the near field communication service, the method includes:

The remote terminal successfully matches the first routing descriptor RSD of the first URSP rule.
The method of any one of claims 1-10, wherein after performing the first operation, the method further includes:

The remote terminal performs a third operation based on the first condition;

Wherein, the first condition includes at least one of the following:

The discovery process of the relay terminal of the near field communication service failed;

The PC5 connection establishment with the relay terminal failed;

The first timer expires;

The number of failures allowed by the remote terminal to establish a relay connection reaches the first number;

Wherein, the third operation includes at least one of the following:

Starting from the highest priority UE routing policy URSP rule, rematch the URSP rules;

Match the second RSD whose RSD priority is equal to or lower than the first RSD;

Matches a second URSP with a URSP priority equal to or lower than the first URSP.
The method according to any one of claims 1-11, wherein the expiration time and/or the first time number of the first timer are determined by the remote terminal according to at least one of the following:

The hardware capabilities of the remote terminal;

The service type of the remote terminal;

The QoS requirements of the remote terminal;

Parameter policy information related to short-range services in the remote terminal.
A relay terminal selection device, including:

The first processing module is configured to perform a first operation when the relay connection of the near-field communication service of the remote terminal fails to be established, wherein the first operation includes at least one of the following:

Start a first timer, the first timer is used to time the relevant process of establishing the relay connection;

Stop performing the discovery process of the relay terminal of the near-field communication service based on the first number, which is the maximum number of failures allowed by the remote terminal to fail to establish a relay connection.
A terminal includes a processor and a memory, the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the implementation of any one of claims 1 to 12 is achieved. The steps of the relay terminal selection method described above.
A readable storage medium on which a program or instructions are stored. When the program or instructions are executed by a processor, the steps of the relay terminal selection method according to any one of claims 1 to 12 are implemented. .
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 method according to any one of claims 1 to 12.
A computer program/program product, the computer program/program product is stored in a non-transitory storage medium, the computer program/program product is executed by at least one processor to implement any one of claims 1 to 12 method described.
A terminal configured to perform the steps of the method according to any one of claims 1 to 12.