WO2024011431A1

WO2024011431A1 - Cause indication method and apparatus, and device and storage medium

Info

Publication number: WO2024011431A1
Application number: PCT/CN2022/105305
Authority: WO
Inventors: 熊艺; 杨星
Original assignee: 北京小米移动软件有限公司
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2024-01-18
Also published as: CN117882435A

Abstract

Disclosed in the embodiments of the present disclosure are a cause indication method and apparatus, which can be applied to a communication system. The method, when executed by a first network device, comprises: indicating a cause to a second network device, or acquiring a cause indicated by the second network device, wherein the cause is used for indicating sidelink (SL) path switching related information and/or indicating sidelink (SL) relay related information. By implementing the method in the present disclosure, the cause related to SL path switching is effectively indicated, and the comprehensiveness of the cause indicated between network devices is improved, thereby improving the cause indication effect.

Description

Cause indication methods, devices, equipment and storage media

Technical field

The present disclosure relates to the field of communication technology, and in particular, to a cause indication method, device, equipment and storage medium.

Background technique

In the communication system, in order to support direct communication between the terminal equipment (User Equipment, UE) and the terminal equipment, the sidelink (SL) communication method is introduced. A terminal device may not be directly connected to the base station, but communicate with the base station through the relay function of another terminal device. Among them, a UE that is not directly connected to the base station is called a remote UE (remote UE), which provides relay The functional UE is called a relay UE, and the remote UE and the relay UE can communicate via sidelink SL unicast. In some versions of the communication protocol, the remote UE is supported to perform path switching between the direct link (Direct Link) and the indirect link (Indirect Link), and the next generation base station (next generation NodeB, gNB) does not change. In other versions of communication protocols, in the supported path switching methods, the gNB connected to the remote UE changes, and inter-node signaling is usually sent to complete the corresponding path switching process.

In the related technology, during the sidelink (SL) path switching process, the reasons indicated by the network equipment are not comprehensive enough, and the reason indication effect is not good.

Contents of the invention

Embodiments of the present disclosure provide a cause indication method, device, equipment, chip system, storage medium, computer program and computer program product, which can be applied in the field of communication technology to achieve effective detection of causes related to sidelink SL path switching. Local indication improves the comprehensiveness of the cause indication between network devices and improves the cause indication effect.

In a first aspect, an embodiment of the present disclosure provides a cause indication method, which is executed by a first network device. The method includes: indicating a cause to a second network device, or obtaining the cause indicated by the second network device; wherein, the The reason is used to indicate sidelink SL path switching related information and/or indicate sidelink SL relay related information.

In one implementation, indicating the reason to the second network device or obtaining the reason indicated by the second network device includes:

Send a first message to the second network device, wherein the first message includes the reason; or

Receive a second message sent by the second network device, where the second message contains the indicated reason.

In one implementation, the first message or the second message includes at least one of the following:

Switch request message;

Switch preparation failure message;

Serial number SN status transfer message;

Toggle cancel message.

In one implementation, the information indicating sidelink SL path switching includes at least one of the following:

Indicate sidelink SL path switching;

Indicates that the timer related to path switching has expired;

Indicates path switching configuration changes;

Indicates that the reason for requesting a path switch is radio-related;

Indicates that the reason for canceling the path switch is radio related;

Indicates partial path switching.

In one implementation, the information indicating sidelink SL relay related information includes at least one of the following:

Indicates that the relay is unavailable;

Indicates that the relay is not supported;

Instruction relay is not allowed;

Indicate that resources reserved for the first terminal device configured as a remote terminal device are changed;

indicating that a second terminal device determined for a first terminal device configured as a remote terminal device is changed, wherein said second terminal device provides a relay function;

Indicate failure to configure the second terminal device;

Instruct the second terminal device to lose connection;

Indicates that the first terminal device loses connection.

In one implementation, indicating the reason to the second network device includes:

In response to the occurrence of the setting event, a cause indicating the occurrence of the setting event is sent to the second network device.

In one implementation, the setting event includes at least one of the following:

Send a first designated message to the second network device;

A second designated message sent by the second network device is received.

In one embodiment, wherein,

If the first specified message is a switching request message, the reason is used to indicate that the reason for requesting path switching is related to the radio.

In one embodiment, wherein,

If the second specified message is a handover preparation failure message, the reason is used to indicate at least one of the following:

Indicates that the relay is unavailable;

Indicates that the relay is not supported;

Instruction relay is not allowed;

Indicates that the timer related to path switching has expired;

Indicates that the second terminal device has lost connection, wherein the second terminal device provides a relay function.

In one embodiment, the reason is at least one of the following:

Wireless network layer reasons;

Transport layer reasons;

Protocol layer reasons.

In one implementation, the value of the cause is used to indicate sidelink SL path switching related information and/or to indicate sidelink SL relay related information.

In a second aspect, embodiments of the present disclosure provide another cause indication method, which is executed by the second network device. The method includes:

Obtain the reason indicated by the first network device, or indicate the reason to the first network device;

Wherein, the reason is used to indicate sidelink SL path switching related information and/or indicate sidelink SL relay related information.

In one implementation, the obtaining the reason indicated by the first network device or indicating the reason to the first network device includes:

Receive a first message sent by the first network device, wherein the first message contains a reason; or

Send a second message to the first network device, wherein the second message includes the indicated reason.

Switch request message;

Switch preparation failure message;

Serial number SN status transfer message;

Toggle cancel message.

Indicate sidelink SL path switching;

Indicates that the timer related to path switching has expired;

Indicates path switching configuration changes;

Indicates that the reason for requesting a path switch is radio-related;

Indicates that the reason for canceling the path switch is radio related;

Indicates partial path switching.

Indicates that the relay is unavailable;

Indicates that the relay is not supported;

Instruction relay is not allowed;

Indicate failure to configure the second terminal device;

Instruct the second terminal device to lose connection;

Indicates that the first terminal device loses connection.

In one implementation, the reason for obtaining the first network device indication includes:

Receive a cause sent by the first network device indicating the occurrence of a setting event, wherein the cause is sent by the first network device in response to the occurrence of the setting event.

In one embodiment, the method further includes:

Receive the first designated message sent by the first network device; or

Send a second designated message to the first network device.

In one embodiment, wherein,

If the first specified message is a switching request message, the reason is used to indicate that the reason for requesting path switching is related to the radio and/or to indicate that the reason for canceling the path switching is related to the radio.

In one embodiment, wherein,

Indicates that the relay is unavailable;

Indicates that the relay is not supported;

Instruction relay is not allowed;

Indicates that the timer related to path switching has expired;

In one embodiment, the reason is at least one of the following:

Wireless network layer reasons;

Transport layer reasons;

Protocol layer reasons.

In a third aspect, embodiments of the present disclosure provide a communication device that has some or all of the functions of the first network device in implementing the method described in the first aspect. For example, the functions of the communication device may include some of the functions in the present disclosure. Or the functions in all the embodiments may also be provided to implement the functions of any one embodiment in the present disclosure independently. The functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

In one implementation, the structure of the communication device may include a transceiver module and a processing module, and the processing module is configured to support the communication device to perform corresponding functions in the above method. The transceiver module is used to support communication between the communication device and other devices. The communication device may further include a storage module coupled to the transceiver module and the processing module, which stores necessary computer programs and data for the communication device.

As an example, the processing module may be a processor, the transceiver module may be a transceiver or a communication interface, and the storage module may be a memory.

In the fourth aspect, embodiments of the present disclosure provide another communication device that has some or all of the functions of the second network device in the method example described in the second aspect. For example, the functions of the communication device can be provided in the present disclosure. The functions in some or all of the embodiments may also be used to independently implement any one of the embodiments of the present disclosure. The functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

Optionally, in an embodiment of the present disclosure, the structure of the communication device may include a transceiver module and a processing module, and the processing module is configured to support the communication device in performing corresponding functions in the above method. The transceiver module is used to support communication between the communication device and other devices. The communication device may further include a storage module coupled to the transceiver module and the processing module, which stores necessary computer programs and data for the communication device.

In a fifth aspect, an embodiment of the present disclosure provides a communication device. The communication device includes a processor. When the processor calls a computer program in a memory, it executes the cause indication method described in the first aspect.

In a sixth aspect, an embodiment of the present disclosure provides a communication device. The communication device includes a processor. When the processor calls a computer program in a memory, it executes the cause indication method described in the second aspect.

In a seventh aspect, an embodiment of the present disclosure provides a communication device. The communication device includes a processor and a memory, and a computer program is stored in the memory; the processor executes the computer program stored in the memory, so that the communication device executes The cause indication method described in the first aspect above.

In an eighth aspect, an embodiment of the present disclosure provides a communication device. The communication device includes a processor and a memory, and a computer program is stored in the memory; the processor executes the computer program stored in the memory, so that the communication device executes The cause indication method described in the second aspect above.

In a ninth aspect, an embodiment of the present disclosure provides a communication device. The device includes a processor and an interface circuit. The interface circuit is used to receive code instructions and transmit them to the processor. The processor is used to run the code instructions to cause the The device executes the cause indication method described in the first aspect.

In a tenth aspect, an embodiment of the present disclosure provides a communication device. The device includes a processor and an interface circuit. The interface circuit is used to receive code instructions and transmit them to the processor. The processor is used to run the code instructions to cause the The device executes the cause indication method described in the above second aspect.

In an eleventh aspect, an embodiment of the present disclosure provides a communication system, which includes the communication device described in the third aspect and the communication device described in the fourth aspect, or the system includes the communication device described in the fifth aspect and The communication device according to the sixth aspect, or the system includes the communication device according to the seventh aspect and the communication device according to the eighth aspect, or the system includes the communication device according to the ninth aspect and the communication device according to the tenth aspect. the above-mentioned communication device.

In a twelfth aspect, an embodiment of the present disclosure provides a computer-readable storage medium for storing instructions used by the above-mentioned first network device. When the instructions are executed, the first network device is caused to execute the above-mentioned first network device. The cause indication method described in the aspect.

In a thirteenth aspect, embodiments of the present disclosure provide a readable storage medium for storing instructions used by the above-mentioned second network device. When the instructions are executed, the second network device is caused to execute the above-mentioned second aspect. The stated cause indicates the method.

In a fourteenth aspect, the present disclosure also provides a computer program product including a computer program, which when run on a computer causes the computer to execute the cause indication method described in the first aspect.

In a fifteenth aspect, the present disclosure also provides a computer program product including a computer program, which when run on a computer causes the computer to execute the cause indication method described in the second aspect.

In a sixteenth aspect, the present disclosure provides a chip system. The chip system includes at least one processor and an interface for supporting the first network device to implement the functions involved in the first aspect, for example, determining or processing the functions involved in the above method. at least one of data and information.

In a possible design, the chip system further includes a memory, and the memory is used to store necessary computer programs and data for the first network device. The chip system may be composed of chips, or may include chips and other discrete devices.

In a seventeenth aspect, the present disclosure provides a chip system, which includes at least one processor and an interface for supporting a second network device to implement the functions involved in the second aspect, for example, determining or processing the functions involved in the above method. at least one of data and information.

In a possible design, the chip system further includes a memory, and the memory is used to store necessary computer programs and data for the second network device. The chip system may be composed of chips, or may include chips and other discrete devices.

In an eighteenth aspect, the present disclosure provides a computer program that, when run on a computer, causes the computer to execute the cause indication method described in the first aspect.

In a nineteenth aspect, the present disclosure provides a computer program that, when run on a computer, causes the computer to execute the cause indication method described in the second aspect.

In summary, the cause indication methods, devices, equipment, chip systems, storage media, computer programs and computer program products provided in the embodiments of the present disclosure can achieve the following technical effects:

By indicating the reason to the second network device, or obtaining the reason indicated by the second network device, where the reason is used to indicate sidelink SL path switching related information and/or indicate sidelink SL relay related information, the implementation of the Reasons related to sidelink SL path switching are effectively indicated, which improves the comprehensiveness of reasons indicated between network devices and improves the effect of reason indication.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the disclosure or the background technology, the drawings required to be used in the embodiments or the background technology of the disclosure will be described below.

Figure 1a is a schematic architectural diagram of a communication system provided by an embodiment of the present disclosure;

Figure 1b is a schematic diagram of path switching provided by an embodiment of the present disclosure;

Figure 1c is another schematic diagram of path switching provided by an embodiment of the present disclosure;

Figure 1d is another schematic diagram of path switching provided by an embodiment of the present disclosure;

Figure 1e is another schematic diagram of path switching provided by an embodiment of the present disclosure;

Figure 2 is a schematic flowchart of a cause indication method provided by an embodiment of the present disclosure;

Figure 3 is a schematic flowchart of a cause indication method provided by an embodiment of the present disclosure;

Figure 4 is a schematic flowchart of a cause indication method provided by an embodiment of the present disclosure;

Figure 5 is a schematic flowchart of another cause indication method provided by an embodiment of the present disclosure;

Figure 6 is a schematic flowchart of another cause indication method provided by an embodiment of the present disclosure;

Figure 7 is a schematic flowchart of another cause indication method provided by an embodiment of the present disclosure;

Figure 8 is a schematic flowchart of another cause indication method provided by an embodiment of the present disclosure;

Figure 9 is a schematic flowchart of another cause indication method provided by an embodiment of the present disclosure;

Figure 10 is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure;

Figure 11 is a schematic structural diagram of another communication device provided by an embodiment of the present disclosure;

Figure 12 is a schematic structural diagram of a chip according to an embodiment of the present disclosure.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with embodiments of the present disclosure. Rather, they are merely examples of apparatus and methods consistent with aspects of embodiments of the present disclosure as detailed in the appended claims.

The terminology used in the embodiments of the present disclosure is for the purpose of describing specific embodiments only and is not intended to limit the embodiments of the present disclosure. As used in the embodiments of the present disclosure and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used to describe various information in the embodiments of the present disclosure, the information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the embodiments of the present disclosure, the first information may also be called second information, and similarly, the second information may also be called first information. Depending on the context, the words "if" and "if" as used herein may be interpreted as "when" or "when" or "in response to determining."

For ease of understanding, terminology involved in this disclosure is first introduced.

1. Community (mobile communication terminology)

A cell, also known as a cellular cell, refers to the area covered by a base station or a part of the base station (sector antenna) in a cellular mobile communication system. In this area, mobile stations can reliably communicate with the base station through wireless channels. communication. In a cell, there can be one or more beams.

2. Switch

Handover is one of the mobility management measures of the communication system. In the communication system, the terminal equipment can perform cell switching or beam switching operations to change the channel used in the communication process between the terminal equipment and the network equipment.

3. Radio Resource Control (RRC) refers to the management, control and scheduling of wireless resources through set policies and means, and makes full use of limited wireless network resources as much as possible while meeting the requirements of service quality. Ensure that the planned coverage area is reached and improve business capacity and resource utilization as much as possible.

4. Radio generally refers to radio waves, which refer to electromagnetic waves in the radio frequency band that propagate in free space (including air and vacuum). The shorter the wavelength and higher the frequency of radio waves, the more information can be transmitted in the same time. Radio waves propagate in space in the following ways: direct radiation, reflection, refraction, penetration, diffraction (diffraction) and scattering.

In order to better understand a cause indication method disclosed in the embodiment of the present disclosure, the communication system to which the embodiment of the present disclosure is applicable is first described below.

Please refer to Figure 1a, which is a schematic architectural diagram of a communication system provided by an embodiment of the present disclosure. The communication system may include but is not limited to two network devices and two terminal devices. The number and form of devices shown in Figure 1a are only for examples and do not constitute a limitation on the embodiment of the present disclosure. In actual applications, it may include two or two More than one network device, one or more terminal devices. The communication system shown in Figure 1a includes two network devices (one network device 101 is the network device before the sidelink SL path switching, which can also be called the source network device, and the other network device 102 is the sidelink Taking the network device after SL path switching, which may also be called the target network device), a terminal device 103 that provides a relay function and a terminal device 104 configured as a remote end as an example, the terminal device 103 is configured as The remote terminal device 104 provides a relay function.

It should be noted that the technical solutions of the embodiments of the present disclosure can be applied to various communication systems. For example: long term evolution (LTE) system, fifth generation (5th generation, 5G) mobile communication system, 5G new radio (NR) system, or other future new mobile communication systems.

The network device in the embodiment of the present disclosure is an entity on the network side that is used to transmit or receive signals. For example, the network equipment can be an evolved base station (evolved NodeB, eNB), a transmission point (transmission reception point, TRP), a next generation base station (next generation NodeB, gNB) in an NR system, a base station in other future mobile communication systems, or Access nodes in wireless fidelity (WiFi) systems, etc. The embodiments of the present disclosure do not limit the specific technologies and specific equipment forms used by network equipment.

The network equipment provided by the embodiments of the present disclosure may be composed of a centralized unit (CU) and a distributed unit (DU). The CU may also be called a control unit (control unit). CU-DU is used. The structure can separate the protocol layers of network equipment, such as base stations, and place some protocol layer functions under centralized control on the CU. The remaining part or all protocol layer functions are distributed in the DU, and the CU centrally controls the DU.

The terminal device 103 that provides the relay function and the terminal device 104 that is configured as a remote end in the embodiment of the present disclosure are an entity on the user side that is used to receive or transmit signals, such as a mobile phone. Terminal equipment can also be called terminal equipment (terminal), user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal equipment (mobile terminal, MT), etc. The terminal device can be a car with communication functions, a smart car, a mobile phone, a wearable device, a tablet computer (Pad), a computer with wireless transceiver functions, a virtual reality (VR) terminal device, an augmented reality ( augmented reality (AR) terminal equipment, wireless terminal equipment in industrial control, wireless terminal equipment in self-driving, wireless terminal equipment in remote medical surgery, smart grid ( Wireless terminal equipment in smart grid, wireless terminal equipment in transportation safety, wireless terminal equipment in smart city, wireless terminal equipment in smart home, etc.

The embodiments of the present disclosure do not limit the specific technology and specific equipment form used by the terminal equipment.

The first terminal device mentioned in the embodiment of this disclosure may refer to the terminal device 104 configured as a remote end, the second terminal device may refer to the terminal device 103 that provides a relay function, and the first network device may refer to the source network device 101 , the second network device is the target network device 102 .

Among them, before the sidelink SL path is switched, the terminal device 104 configured as the remote end can perform data communication with the source network device 101 through the relay function provided by the terminal device 103, and in the sidelink SL path After the handover, the terminal device 104 configured as the remote end can perform data communication with the target network device 102 through the relay function.

It can be understood that the communication system described in the embodiments of the present disclosure is to more clearly illustrate the technical solutions of the embodiments of the present disclosure, and does not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. As those of ordinary skill in the art will know, With the evolution of system architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present disclosure are also applicable to similar technical problems.

Among them, an example of sidelink SL path switching is as follows:

The first type is direct path switching within gNB:

For example, a first terminal device configured as a remote terminal device, a second terminal device providing a relay function, and a first network device; switching to: a first terminal device configured as a remote terminal device, a second terminal device configured as a remote terminal device, and a first network device. Internet equipment.

In this switching scenario, the reason indication between the first terminal device and the second network device may be as shown in Figure 1b. Figure 1b is a schematic diagram of a path switching provided by an embodiment of the present disclosure.

Second, direct to indirect path switching within gNB:

For example, a first terminal device configured as a remote terminal device and a first network device; switching to: a first terminal device configured as a remote terminal device, a second terminal device providing a relay function, and a second network device. Internet equipment.

In this switching scenario, the schematic indicating the cause between the first terminal device and the second network device may be as shown in Figure 1c, which is another schematic diagram of path switching provided by an embodiment of the present disclosure.

The third type, gNB external connection to indirect path switching:

For example, the first terminal device configured as a remote terminal device, the second terminal device providing the relay function, and the first network device; switching to: the first terminal device configured as the remote terminal device, the providing relay function. The third terminal device with the relay function (that is, the terminal device providing the relay function changes) and the first network device.

In this switching scenario, as shown in Figure 1d, which is a schematic diagram of another path switching provided by an embodiment of the present disclosure, since the network device does not switch, the reason does not need to be indicated, and the first network device itself learns the reason. That’s it, there are no restrictions on this.

The fourth type, gNB intra-to-indirect path switching:

For example, the first terminal device configured as a remote terminal device, the second terminal device providing the relay function, and the first network device; switching to: the first terminal device configured as the remote terminal device, the providing relay function. The third terminal device with the relay function (that is, the terminal device providing the relay function changes) and the second network device.

In this switching scenario, the schematic indicating the cause between the first terminal device and the second network device may be as shown in Figure 1e, which is another schematic diagram of path switching provided by an embodiment of the present disclosure.

The reason indication method in the embodiment of the present disclosure can be applied to the above-mentioned switching scenario, and there is no limitation on this.

The cause indication method and device provided by the present disclosure will be introduced in detail below with reference to the accompanying drawings. Figure 2 is a schematic flowchart of a cause indication method provided by an embodiment of the present disclosure. The method is executed by the first network device.

The first network device may be a source base station for communication before the sidelink SL path is switched, and the second network device may be a destination base station for communication after the sidelink SL path is switched.

As shown in Figure 2, the method may include but is not limited to the following steps:

S102: Indicate the reason to the second network device, or obtain the reason indicated by the second network device; where the reason is used to indicate sidelink SL path switching related information and/or indicate sidelink SL relay related information.

Wherein, the first network device may indicate the reason to the second network device according to the actual switching situation of the sidelink SL path.

In the cause indication method provided by the embodiments of the present disclosure, the value of the cause may be used to indicate sidelink SL path switching related information and/or sidelink SL relay related information.

For example, the first network device may configure the value of the cause according to the actual switching situation of the sidelink SL path, carry the value of the cause in the indication message, and indicate the reason to the second network device based on the indication message, There are no restrictions on this.

In the reason indication method provided by the embodiment of the present disclosure, the corresponding reason can also be directly indicated to the second network device, that is, the content indicated by the reason is sent to the second network device, without limitation.

For example, the first network device may configure the reason according to actual switching conditions of the sidelink SL path, and directly provide the content indicated by the reason to the second network device, without limitation.

Of course, any other possible method can also be used to indicate the reason to the second network device, such as an implicit indication method, a display indication method, etc., and there is no limit to this.

In the embodiment of the present disclosure, the second network device can also configure the value of the cause according to the actual switching situation of the sidelink SL path, carry the value of the cause in the indication message, and send the request to the first network based on the indication message. If the device indicates the reason, the first network device can receive the indication message sent by the second network device to learn the reason for the indication, and there is no restriction on this.

Of course, the second network device can also use any other possible method to indicate the reason to the first network device, such as an implicit indication method, a display indication method, etc., and there is no limit to this.

Wherein, the value of the indicated reason is used to indicate sidelink SL path switching related information and/or to indicate sidelink SL relay related information, for example, the reason is used to indicate sidelink SL path switching related information, or The cause is used to indicate information related to the sidelink SL relay, or the reason is used to indicate information related to the sidelink SL path switching and to indicate information related to the sidelink SL relay, which can flexibly indicate the sidelink. Reasons related to SL path switching.

Among them, information related to sidelink SL path switching is used to describe information related to sidelink SL path switching in the above example switching scenario, such as sidelink SL path switching delay, sidelink SL path switching There are no restrictions on the response rate, whether the sidelink SL path switching is successful, etc.

Among them, the side link SL relay related information is used to describe the information related to the relay function in the above example switching scenario, such as whether the terminal device providing the relay function is changed during the side link SL path switching process. There are no restrictions on whether the resources of the terminal equipment that provide the relay function are sufficient, etc.

In the cause indication method provided in the embodiments of the present disclosure, the content of the Cause indication can be the value of the Cause, and there is no limit to this.

For the reason indication method provided in the embodiments of the present disclosure, the relay UE (Relay) (the relay UE is the terminal device that provides the relay function) can be a relay UE in the U2N architecture or a relay UE in the U2U architecture. There is no restriction on this.

In the U2N architecture, the UE can communicate with the base station through the relay of another UE without directly connecting to the base station. The UE that is not connected to the base station is called a remote UE (remote UE), and the UE that provides the relay function is called a remote UE. Relay UE (relay UE), the remote UE and the relay UE communicate through sidelink SLsidelink unicast communication. In the U2U architecture, a UE can establish a connection with a relay UE, the relay UE establishes a connection with another relay UE, and the other relay UE establishes a connection with the base station.

In the cause indication method provided in the embodiment of this disclosure, the node may be the next generation base station gNB. The cause indication method provided in the disclosed embodiments is that the cause is at least one of the following: Radio Network Layer cause, Transport Layer cause, and Protocol cause, thereby achieving improvement Comprehensiveness of reasons indicated.

In this embodiment, the reason is indicated to the second network device or the reason indicated by the second network device is obtained, where the reason is used to indicate sidelink SL path switching related information and/or to indicate sidelink SL relay. Related information enables effective indication of reasons related to sidelink link SL path switching, improves the comprehensiveness of reasons indicated between network devices, and improves the effect of reason indication.

Figure 3 is a schematic flowchart of a cause indication method provided by an embodiment of the present disclosure. The method is executed by the first network device.

As shown in Figure 3, the method may include but is not limited to the following steps:

S103: Send a first message to the second network device, where the first message contains a reason, where the reason is used to indicate sidelink SL path switching related information and/or indicate sidelink SL relay related information.

That is to say, the embodiments of the present disclosure also support cause indication by transmitting messages, where the message transmitted by the first network device to the second network device for indicating the cause may be called the first message.

The first message includes at least one of the following: a handover request message; a handover preparation failure message; a serial number (Serial Number, SN) status transmission message; and a handover cancellation message.

In the embodiment of the present disclosure, the value of the reason can also be carried in the first message, and the first network device sends the first message to the second network device, and then the second network device parses the first message to obtain the reason. value, and then learns the cause indicated by the value of that cause.

In the embodiment of the present disclosure, the reason can also be carried in the first message in any other possible manner to indicate the reason to the second network device, and there is no limitation on this.

In this embodiment, by sending a first message to the second network device, where the first message contains a reason, it is possible to indicate sidelink SL path switching related information and/or indicate sidelink SL path switching based on the sent message. By following relevant information, it can effectively save the required instruction overhead and improve the flexibility of reason instructions.

Figure 4 is a schematic flowchart of a cause indication method provided by an embodiment of the present disclosure. The method is executed by the first network device.

As shown in Figure 4, the method may include but is not limited to the following steps:

S104: Receive a second message sent by the second network device, where the second message contains an indicated reason, where the reason is used to indicate sidelink SL path switching related information and/or indicate sidelink SL relay. Related Information.

The embodiment of the present disclosure also supports cause indication in the form of message transmission, where the message transmitted by the second network device to the first network device for indicating the cause may be called a second message.

The second message includes at least one of the following: a handover request message; a handover preparation failure message; a serial number (Serial Number, SN) status transmission message; and a handover cancellation message.

In the embodiment of the present disclosure, the value of the reason can also be carried in the second message, and the second network device sends the second message to the first network device, and then the first network device parses the second message to obtain The value of the cause, and then learns the cause indicated by the value of the cause.

In the embodiment of the present disclosure, the reason can also be carried in the second message in any other possible manner, so that the first network device can learn the indicated reason in a timely manner, and there is no limit to this.

In this embodiment, by receiving the second message sent by the second network device, where the second message contains the reason for the indication, it is possible to indicate sidelink SL path switching related information and/or indicate sidelink based on the sent message. SL relay related information can effectively save the required indication overhead and improve the flexibility of cause indication.

The cause indication method provided by the embodiment of the present disclosure indicates information related to sidelink SL path switching, including at least one of the following: indicating sidelink SL path switching; indicating that the timer related to path switching has expired; indicating that path switching configuration changes ;Indicates that the reason for requesting path switching is radio-related; indicates that the reason for canceling path switching is radio-related; indicates partial path switching, thereby effectively improving the comprehensiveness of information indication related to sidelink SL path switching, and improving the indicated sidelink Referenceability of information related to SL path switching.

Instructing sidelink SL path switching may, for example, indicate that the sidelink SL path switching process is initiated due to path switching, or indicate that sidelink SL path switching has occurred, and there is no limit to this.

Among them, indicating that the timer related to path switching has expired, for example, the timer time is 10 milliseconds, and the side link SL path switching process continues for 10 milliseconds and the switching has not been completed, it indicates that the timer related to path switching has timed out. In this regard No restrictions.

Among them, indicating a change in the path switching configuration can be, for example, that the parameter initially configured for the sidelink SL path switching is A and is modified to parameter B during the sidelink SL path switching process, indicating that the path switching configuration has changed, or, also, Changes can be made to configuration files related to sidelink SL path switching, etc., without restrictions.

Radio generally refers to radio waves, which refer to electromagnetic waves in the radio frequency band that propagate in free space (including air and vacuum). The shorter the wavelength and higher the frequency of radio waves, the more information can be transmitted in the same time. Radio waves propagate in space in the following ways: direct radiation, reflection, refraction, penetration, diffraction (diffraction) and scattering.

Among them, indicating that the reason for requesting path switching is related to radio, it can indicate that the sidelink SL path switching is related to the above-mentioned situation involving radio waves. For example, the quality of the radio waves may be poor and sidelink SL is to be performed. Path switching, or any other possible association situation, is not limited.

Among them, indicating that the reason for canceling path switching is related to radio, it can indicate that the cancellation of sidelink SL path switching is related to the above-mentioned situation involving radio waves. For example, it can be determined that the quality of radio waves after switching is poor. The pending sidelink link SL path switching can be canceled, or it can be any other possible correlation situation, and there is no limit to this.

Among them, instructing partial path switching can provide a reason for the cancellation of the switching, and instruct the source network device to confirm that if the path switching is not continued to connect to the target network device, the service continuity of the remote terminal device UE will be better, and there is no restriction on this.

The reason indication method provided by the embodiment of the present disclosure indicates sidelink SL relay related information, including at least one of the following: indicating that the relay is unavailable; indicating that the relay is not supported; indicating that the relay is not allowed; indicating that it is configured as The resources reserved by the first terminal device of the remote terminal device are changed; the second terminal device indicated to be determined for the first terminal device configured as the remote terminal device is changed, wherein the second terminal device provides a relay function; Indicates that the configuration of the second terminal device fails; indicates that the second terminal device loses connection; indicates that the first terminal device loses connection, thereby effectively improving the comprehensiveness of the information indication related to the sidelink SL relay and improving the indicated sidelink SL Referenceability of relay-related information.

It should be noted that the "not supported" reason value indicates that the relevant function is missing. On the other hand, a reason value of "Unavailable" indicates that the related functionality already exists, but there are insufficient resources to perform the requested operation.

The indication that the relay is unavailable may, for example, indicate that the relevant relay UE is unavailable, and there is no restriction on this; the indication that the relay is not supported may, for example, indicate that the currently accessed target cell does not support the relay UE, There is no restriction on this; to indicate that the relay is not allowed, you can, for example, indicate that the corresponding UE (such as a UE configured as a remote terminal device) is not allowed to access the current relay UE or the target relay UE. There is no restriction on this.

The indication that the resources reserved for the first terminal device configured as a remote terminal device is changed may, for example, be that the channel resources, signaling resources, etc. reserved for the first terminal device are changed, and there is no limit to this. ; Indicates that the second terminal device determined for the first terminal device configured as a remote terminal device is changed. For example, to determine that it is terminal device A that provides the relay function to the first terminal device, determine the terminal that provides the relay function. The device is changed from terminal device A to terminal device B, and there is no restriction on this; to indicate failure to configure the second terminal device, you can, for example, instruct the target node (the second network device to establish a connection after path switching) to reconfigure the target relay UE or Connection establishment with the target relay UE failed.

Instructing the second terminal device to lose connection may, for example, indicate that the request for this behavior (sidelink SL path switching) is because the relay UE has lost the wireless connection, and there is no restriction on this; indicating that the first terminal device has lost connection, This behavior (sidelink SL path switching) may be requested, for example, to indicate that the remote UE has lost the radio connection, without limitation.

According to the cause indication method provided by the embodiments of the present disclosure, the above switching may also refer to path switching, which is not limited.

In the cause indication method provided by the embodiments of the present disclosure, the above-mentioned inter-node (inter-base station) message contains a Cause IE (value of the cause) with an appropriate value, and there is no restriction on this.

FIG. 5 is a schematic flowchart of another cause indication method provided by an embodiment of the present disclosure. The method is executed by the first network device.

As shown in Figure 5, the method may include but is not limited to the following steps:

S105: In response to the occurrence of the setting event, send a cause indicating the occurrence of the setting event to the second network device.

In the embodiment of the present disclosure, reasons related to sidelink SL path switching can be indicated based on event triggering, where the event used to determine the timing of indicating the cause can be called a setting event, and the setting event can be, for example, the first An event occurs when a network device sends a specific message to a second network device, or it can also be an event when the first network device receives a specific message sent by the second network device, or it can also be any other possible sidelink SL path. Switching related events, no restrictions on this.

In the cause indication method provided by the embodiments of the present disclosure, setting the event includes at least one of the following: sending a first designated message to the second network device; receiving a second designated message sent by the second network device, which can effectively improve the accuracy of event triggering. It is convenient to carry the reason in the message for indication.

The first designated message may be, for example, a handover request message, a handover preparation failure message, a sequence number SN status transmission message, or a handover cancellation message, and the second designated message may be, for example, a handover request message, a handover preparation failure message, a sequence number SN status transmission message, or a handover cancellation message. Transmitting messages, or switching to cancel messages, there are no restrictions on this.

In this embodiment, in response to the occurrence of the setting event, a cause indicating the occurrence of the setting event is sent to the second network device. The cause is used to indicate sidelink SL path switching related information and/or indicate sidelink SL path switching. Following relevant information, the cause indication related to the sidelink SL path switching is implemented based on event triggering, improving the timeliness of the cause indication related to the sidelink SL path switching, and ensuring the effect of the cause indication.

FIG. 6 is a schematic flowchart of another cause indication method provided by an embodiment of the present disclosure, and the method is executed by the second network device.

The second network device may be a destination base station for communication after sidelink SL path switching.

As shown in Figure 6, the method may include but is not limited to the following steps:

S106: Obtain the reason indicated by the first network device, or indicate the reason to the first network device; where the reason is used to indicate sidelink SL path switching related information and/or indicate sidelink SL relay related information.

For descriptions of terminology in the steps performed by the second network device, reference may also be made to the above embodiments, and details will not be described again here.

That is to say, in the embodiment of the present disclosure, the second network device can obtain the reason indicated by the first network device, and determine the sidelink SL path switching related information and/or indicate the sidelink SL based on the indicated reason. Follow relevant information in order to obtain relevant information in a timely manner.

In the embodiment of the present disclosure, the second network device may also indicate the reason to the first network device; where the reason is used to indicate sidelink SL path switching related information and/or indicate sidelink SL relay related information, In order to facilitate the first network device to obtain relevant information in a timely manner.

In the cause indication method provided by the embodiment of the present disclosure, the value of the cause is used to indicate sidelink SL path switching related information and/or to indicate sidelink SL relay related information.

For example, the first network device may configure the value of the cause according to the actual switching situation of the sidelink SL path, carry the value of the cause in the indication message, and indicate the reason to the second network device based on the indication message, Then the second network device can parse the indication message and determine the corresponding cause based on the value of the cause, or the second network device configures the value of the cause based on the actual switching of the sidelink SL path and determines the value of the cause. The value is carried in the indication message, and the reason is indicated to the first network device based on the indication message, and there is no restriction on this.

In the reason indication method provided by the embodiment of the present disclosure, the content of the reason indicated by the first network device may also be received, or the content of the corresponding reason may be indicated to the first network device, without limitation.

For example, the first network device may configure the reason according to the actual switching situation of the sidelink SL path, and directly provide the content indicated by the reason to the second network device, and the second network device receives the content indicated by the reason, and There is no restriction on this.

In this embodiment, the reason is obtained by obtaining the reason indicated by the first network device, or indicating the reason to the first network device; where the reason is used to indicate sidelink SL path switching related information and/or indicate sidelink SL relay Related information enables effective indication of reasons related to sidelink link SL path switching, improves the comprehensiveness of reasons indicated between network devices, and improves the effect of reason indication.

FIG. 7 is a schematic flowchart of another cause indication method provided by an embodiment of the present disclosure, and the method is executed by the second network device.

As shown in Figure 7, the method may include but is not limited to the following steps:

S107: Receive the first message sent by the first network device, where the first message contains a reason, where the reason is used to indicate sidelink SL path switching related information and/or indicate sidelink SL relay related information. .

In the embodiment of the present disclosure, the value of the cause can also be carried in the first message, and the first network device sends the first message to the second network device, and then the second network device receives the first message and responds to the first message. The message is parsed to obtain the value of the cause, and then the cause indicated by the value of the cause is obtained.

In the embodiment of the present disclosure, the reason can also be carried in the first message in any other possible manner, so that the second network device can learn the indicated reason in a timely manner, and there is no limit to this.

In this embodiment, by receiving the first message sent by the first network device, where the first message contains the reason, it is possible to indicate the sidelink SL path switching related information and/or indicate the sidelink SL based on the sent message. Relaying relevant information can effectively save the required instruction overhead and improve the flexibility of cause instructions.

FIG. 8 is a schematic flowchart of another cause indication method provided by an embodiment of the present disclosure, and the method is executed by the second network device.

As shown in Figure 8, the method may include but is not limited to the following steps:

S108: Send a second message to the first network device, where the second message contains an indicated reason, where the reason is used to indicate sidelink SL path switching related information and/or indicate sidelink SL relay related information. information.

That is to say, the embodiment of the present disclosure also supports cause indication by transmitting a message, where the message transmitted by the second network device to the first network device for indicating the cause may be called the second message.

In the embodiment of the present disclosure, the value of the reason can also be carried in the second message, and the second network device sends the second message to the first network device, and then the first network device parses the second message to obtain the reason. value, and then learns the cause indicated by the value of that cause.

In the embodiment of the present disclosure, the reason can also be carried in the second message in any other possible manner to indicate the reason to the first network device, and there is no limitation on this.

In this embodiment, by sending a second message to the first network device, where the second message contains the reason for the indication, it is possible to indicate the sidelink SL path switching related information and/or indicate the sidelink based on the sent message. SL relay related information can effectively save the required indication overhead and improve the flexibility of cause indication.

FIG. 9 is a schematic flowchart of another cause indication method provided by an embodiment of the present disclosure, and the method is executed by the second network device.

As shown in Figure 9, the method may include but is not limited to the following steps:

S109: Receive a reason sent by the first network device indicating the occurrence of the setting event, where the reason is sent by the first network device in response to the occurrence of the setting event.

In the cause indication method provided by the embodiment of the present disclosure, the set event includes at least one of the following: the first network device sends a first designated message to the second network device; the first network device receives the second designated message sent by the second network device , which can effectively improve the accuracy of event triggering and facilitate the carrying of the value of the cause in the message for indication.

According to the cause indication method provided by the embodiments of the present disclosure, the second network device can also receive the first designated message sent by the first network device, or send the second designated message to the first network device, thereby improving the flexibility of the cause indication.

In this embodiment, the reason indicating the occurrence of the setting event is received from the first network device, where the reason is sent by the first network device in response to the occurrence of the setting event, and the reason is used to indicate sidelink SL path switching related information. and/or indicate information related to the sidelink SL relay, to achieve event-triggered indication of reasons related to sidelink SL path switching, improve the timeliness of indication of reasons related to sidelink SL path switching, and ensure Cause indicates effect.

The cause indication method provided by the embodiment of the present disclosure, when a setting event occurs, may include at least one of the following: sending a handover request message to the second network device; determining that the handover preparation failure message sent by the second network device is received; determining that the second network device The device sends a serial number SN status transmission message; sends a first handover cancellation message to the second network device; and determines that the second handover cancellation message sent by the second network device is received, without limitation.

The reason indication method provided by the embodiment of the present disclosure can, in response to the occurrence of a setting event, configure a value for the reason that the second network device sends to indicate the occurrence of the setting event, that is, the value can represent the corresponding cause, and then, the value can be obtained to represent the corresponding cause. The reason is carried in the message and sent to the second network device, and there is no restriction on this.

In the reason indication method provided by the embodiment of the present disclosure, if the first specified message is a handover request message, the reason is used to indicate that the reason for requesting path switching is related to the radio, so as to accurately indicate the reason related to sending the handover request message, which facilitates the second step. The second network device promptly learns the reason why the first network device sends the handover request message.

In the reason indication method provided by the embodiment of the present disclosure, if the second specified message is a handover preparation failure message, the reason is used to indicate at least one of the following: indicating that the relay is unavailable; indicating that the relay does not support it; indicating that the relay is not allowed; indicating that the path The handover-related timer times out; indicating that the second terminal device loses connection. The second terminal device provides a relay function to accurately indicate the reason for sending the handover preparation failure message, so that the second network device can promptly learn about the first The reason why the network device failed to send a handover preparation failure message.

According to the cause indication method provided by the embodiment of the present disclosure, the first network device can respond to the determination to send a switching request message to the second network device, and indicate to the second network device the cause of the setting event, where the cause is used to indicate the request for path switching. The reason is radio-related and/or indicates that the reason for canceling the path switch is radio-related.

For example, the source node (first network device) sends a switching request message to the target node (second network device). The switching request message may carry a reason, and the reason is used to indicate that the reason for requesting path switching is related to radio and/or Indicates that the reason for canceling the path switch is radio related.

According to the cause indication method provided by the embodiment of the present disclosure, the first network device may respond to determining that it has received a handover preparation failure message sent by the second network device, and the handover preparation failure message may carry the reason for the handover preparation failure message sent by the second network device, Wherein, the reason is used to indicate at least one of the following: indicating that the relay is unavailable; indicating that the relay is not supported; indicating that the relay is not allowed; indicating that the timer related to path switching has expired; indicating that the second terminal device has lost the connection, wherein the second Terminal equipment provides relay functionality.

For example, it is determined that the target node (second network device) sends a handover preparation failure message to the source node (first network device), then the handover preparation failure message may carry a reason, and the reason Cause is used to indicate at least one of the following: Instruction The relay is unavailable; indicates that the relay is not supported; indicates that the relay is not allowed; indicates that the timer related to path switching has expired; indicates that the second terminal device has lost the connection, wherein the second terminal device provides the relay function.

According to the cause indication method provided by the embodiment of the present disclosure, the first network device may send a sequence number SN status transmission message in response to determining that the second network device sends a sequence number SN status transmission message. The sequence number SN status transmission message may carry the sequence number SN status transmission message sent by the second network device. Message reason, where the reason is used to indicate side chain SL path switching.

For example, it is determined that the target node (second network device) sends an SN status transmission message to the source node (first network device), then the sequence number SN status transmission message sent by the second network device can be parsed from the sequence number SN status transmission message. Message reason, which is used to indicate side chain SL path switching.

According to the cause indication method provided by the embodiment of the present disclosure, the first network device may respond to sending a first handover cancellation message to the second network device and indicate to the second network device the cause of the setting event, where the cause is used to indicate at least the following: One item: indicating that the reason for requesting path switching is radio-related; indicating that the reason for canceling path switching is radio-related; indicating partial path switching; indicating that the second terminal device has lost connection; indicating that the first terminal device has lost connection, wherein the second terminal device A relay function is provided to the first terminal device.

For example, the source node (first network device) sends a handover cancellation message (the handover cancellation message sent by the first network device may be called a first handover cancellation message) to the target node (second network device), then the The reason is carried in the handover cancellation message and sent to the target node (second network device). The reason is used to indicate at least one of the following: indicating that the reason for requesting path switching is related to the radio; indicating that the reason for canceling the path switching is related to the radio; Instruct partial path switching; instruct the second terminal device to lose connection; instruct the first terminal device to lose connection, wherein the second terminal device provides a relay function to the first terminal device.

According to the cause indication method provided by the embodiment of the present disclosure, the first network device may respond to determining that it has received the second handover cancellation message sent by the second network device, and parse the second handover cancellation message sent by the second network device to obtain the second handover cancellation message sent by the second network device. The message reason, wherein the reason is used to indicate at least one of the following: indicating that the resources reserved for the first terminal device configured as the remote end are changed; indicating the second terminal determined for the first terminal device configured as the remote end. The device is changed, wherein the second terminal device provides a relay function; indicates a path switching configuration change; indicates the first terminal device loses connection.

For example, the target node (second network device) sends a handover cancellation message (the handover cancellation message sent by the second network device may be called a second handover cancellation message) to the source node (first network device), then the The reason is carried in the handover cancellation message to indicate the reason for sending the handover cancellation message. The reason is used to indicate at least one of the following: indicating that the resources reserved for the first terminal device configured as the remote end are changed; The configuration of the second terminal device determined for the remote first terminal device is changed, wherein the second terminal device provides a relay function; the path switching configuration change is instructed; and the first terminal device is instructed to lose connection.

The description of the cause indication method in the embodiment of the present disclosure may be as follows:

1. The message sent by the source node to the target node contains Cause. This IE is used to indicate the cause of a specific event.

2. Cause can be used to indicate SL path switching and/or other SL Relay related situations, including:

2.1 Indicates SL path switching.

Illustratively, it indicates that the process was initiated due to a path switch, or that a path switch occurred.

2.2 indicates that Relay is unavailable.

Illustratively, it indicates that the relevant relay UE is unavailable.

2.3 indicates that Relay is not supported.

For example, it indicates that the current target cell does not support relay UE.

2.4 indicates that Relay is not allowed (or the target Relay is not allowed).

For example, it indicates that the corresponding UE is not allowed to access the current relay UE or the target relay UE.

2.5 Indicates that the timer related to path switching has expired.

2.6 Indicates that the resources reserved for Remote UE are changed.

2.7 Indicates that the target relay UE determined for the Remote UE is changed.

2.8 Indicates path switching configuration changes.

2.9 Indicates that the configuration of the target relay UE failed.

For example, it indicates that the target node has reconfigured the target relay UE or failed to establish a connection with the target relay UE.

2.10 Indicates that path switching is required (or not required) due to radio reasons, that is, the reason for requesting (or canceling) path switching is related to radio.

2.11 indicates partial path switching.

For example, it provides a reason for handover cancellation, indicating that the source node believes that the service continuity of the remote UE will be better if the path switch is not continued to connect the target node.

2.12 Indicates that the relay UE loses connection.

Illustratively, it is indicated that this behavior is requested because the relay UE has lost the wireless connection.

2.13 Indicates that the remote UE has lost connection.

Illustratively, it is indicated that this behavior is requested because the remote UE has lost the wireless connection.

For example, the content indicated by Cause is the value of Cause.

For example, the relay UE (Relay) may be a relay UE in a U2N architecture or a relay UE in a U2U architecture.

For example, the node may be gNB.

3. Based on the specific event in 1, it can be any one or more of the following:

3.1 The source node sends a handover request message to the target node.

For example, Cause in this message may be 2.10.

3.2 The target node sends a handover preparation failure message to the source node.

For example, Cause in this message can be 2.2, 2.3, 2.4, 2.5, and 2.12.

3.3 The target node sends an SN status transfer message to the source node.

For example, Cause in this message may be 2.1.

3.4 The source node sends a handover cancellation message to the target node.

For example, the Cause in this message can be 2.10, 2.11, 2.12, and 2.13.

3.5 The target node sends a handover cancellation message to the source node.

For example, Cause in this message can be 2.6, 2.7, 2.8, or 2.13.

The exemplary switching described above may also refer to path switching.

The exemplary inter-node message above contains the Cause IE with appropriate values.

4. The value of Cause only applies to SL or SL Relay. Cause can be any of Radio Network Layer cause, Transport Layer cause, and Protocol cause.

Figure 10 is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure. The communication device 100 shown in FIG. 10 may include a transceiver module 1001 and a processing module 1002. The transceiving module 1001 may include a sending module and/or a receiving module. The sending module is used to implement the sending function, and the receiving module is used to implement the receiving function. The transceiving module 1001 may implement the sending function and/or the receiving function.

The communication device 100 may be a network device (such as the first network device and the second network device in the foregoing method embodiment), a device in the network device, or a device that can be used in conjunction with the network device. Alternatively, the communication device 100 may be a terminal device, a device in the terminal device, or a device that can be used in conjunction with the terminal device.

Communication device 100, on the first network device side, the device includes:

The transceiver module 1001 is used to indicate the reason to the second network device, or obtain the reason indicated by the second network device;

The reason is used to indicate sidelink SL path switching related information and/or indicate sidelink SL relay related information.

Optional, the transceiver module 1001 is also used for:

Send a first message to the second network device, where the first message includes the reason; or

Optional, the first message or the second message includes at least one of the following:

Switch request message;

Switch preparation failure message;

Serial number SN status transfer message;

Toggle cancel message.

Optional, the transceiver module 1001 is also used for:

Indicate sidelink SL path switching;

Indicates that the timer related to path switching has expired;

Indicates path switching configuration changes;

Indicates that the reason for requesting a path switch is radio-related;

Indicates that the reason for canceling the path switch is radio related;

Indicates partial path switching.

Optional, the transceiver module 1001 is also used for:

Indicates that the relay is unavailable;

Indicates that the relay is not supported;

Instruction relay is not allowed;

indicating that the second terminal device determined for the first terminal device configured as a remote terminal device is changed, wherein the second terminal device provides a relay function;

Indicates failure to configure the second terminal device;

Instruct the second terminal device to lose connection;

Indicates that the first terminal device has lost connection.

Optional, the transceiver module 1001 is also used for:

In response to the occurrence of the setup event, a cause indicating the occurrence of the setup event is sent to the second network device.

Optionally, set events include at least one of the following:

Send the first specified message to the second network device;

A second specified message sent by the second network device is received.

optional, where,

The first specified message is a handover request message, and the cause is used to indicate that the reason for requesting path switching is related to the radio.

optional, where,

The second specified message is a handover preparation failure message, and the reason is used to indicate at least one of the following:

Indicates that the relay is unavailable;

Indicates that the relay is not supported;

Instruction relay is not allowed;

Indicates that the timer related to path switching has expired;

Indicates that the second terminal device loses connection, wherein the second terminal device provides a relay function.

Optional, the reason is at least one of the following:

Wireless network layer reasons;

Transport layer reasons;

Protocol layer reasons.

Optionally, the value of the cause is used to indicate sidelink SL path switching related information and/or to indicate sidelink SL relay related information.

Communication device 100, on the second network device side, the device includes:

The transceiver module 1001 is used to obtain the reason indicated by the first network device, or indicate the reason to the first network device;

Optional, the transceiver module 1001 is also used for:

Receive the first message sent by the first network device, where the first message contains the reason; or

A second message is sent to the first network device, where the second message includes the indicated reason.

Switch request message;

Switch preparation failure message;

Serial number SN status transfer message;

Toggle cancel message.

Optional, the transceiver module 1001 is also used for:

Indicate sidelink SL path switching;

Indicates that the timer related to path switching has expired;

Indicates path switching configuration changes;

Indicates that the reason for requesting a path switch is radio-related;

Indicates that the reason for canceling the path switch is radio related;

Indicates partial path switching.

Optional, the transceiver module 1001 is also used for:

Indicates that the relay is unavailable;

Indicates that the relay is not supported;

Instruction relay is not allowed;

Indicates failure to configure the second terminal device;

Instruct the second terminal device to lose connection;

Indicates that the first terminal device has lost connection.

Optional, the transceiver module 1001 is also used for:

A cause sent by the first network device indicating the occurrence of the setting event is received, wherein the cause is sent by the first network device in response to the occurrence of the setting event.

Optional, the transceiver module 1001 is also used for:

Receive the first designated message sent by the first network device; or

Send a second designated message to the first network device.

optional, where,

The first specified message is a handover request message, and the cause is used to indicate that the reason for requesting path switching is radio-related and/or to indicate that the reason for canceling path switching is radio-related.

optional, where,

Indicates that the relay is unavailable;

Indicates that the relay is not supported;

Instruction relay is not allowed;

Indicates that the timer related to path switching has expired;

Optional, the reason is at least one of the following:

Wireless network layer reasons;

Transport layer reasons;

Protocol layer reasons.

FIG. 11 is a schematic structural diagram of another communication device provided by an embodiment of the present disclosure. The communication device 110 may be a terminal device, a network device (such as the first network device or the second network device in the foregoing method embodiment), or a chip, chip system, or processor that supports the network device to implement the above method. etc., it can also be a chip, chip system, or processor that supports the terminal device to implement the above method. The device can be used to implement the method described in the above method embodiment. For details, please refer to the description in the above method embodiment.

Communication device 110 may include one or more processors 1101. The processor 1101 may be a general-purpose processor or a special-purpose processor, or the like. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data. The central processor can be used to control communication devices (such as base stations, baseband chips, terminal equipment, terminal equipment chips, DU or CU, etc.) and execute computer programs. , processing data for computer programs.

Optionally, the communication device 110 may also include one or more memories 1102, on which a computer program 1104 may be stored, and the processor 1101 may store a computer program 1103. The processor 1101 executes the computer program 1104 and/or Computer program 1103, so that the communication device 110 executes the method described in the above method embodiment. Optionally, the memory 1102 may also store data. The communication device 110 and the memory 1102 can be provided separately or integrated together.

Optionally, the communication device 110 may also include a transceiver 1105 and an antenna 1106. The transceiver 1105 may be called a transceiver unit, a transceiver, a transceiver circuit, etc., and is used to implement transceiver functions. The transceiver 1105 may include a receiver and a transmitter. The receiver may be called a receiver or a receiving circuit, etc., used to implement the receiving function; the transmitter may be called a transmitter, a transmitting circuit, etc., used to implement the transmitting function.

Optionally, the communication device 110 may also include one or more interface circuits 1107. The interface circuit 1107 is used to receive code instructions and transmit them to the processor 1101 . The processor 1101 executes the code instructions to cause the communication device 110 to perform the method described in the above method embodiment.

In one implementation, the processor 1101 may include a transceiver for implementing receiving and transmitting functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuits, interfaces or interface circuits used to implement the receiving and transmitting functions can be separate or integrated together. The above-mentioned transceiver circuit, interface or interface circuit can be used for reading and writing codes/data, or the above-mentioned transceiver circuit, interface or interface circuit can be used for signal transmission or transfer.

In one implementation, the processor 1101 may store a computer program 1103, and the computer program 1103 runs on the processor 1101, causing the communication device 110 to perform the method described in the above method embodiment. The computer program 1103 may be solidified in the processor 1101, in which case the processor 1101 may be implemented by hardware.

In one implementation, the communication device 110 may include a circuit, and the circuit may implement the functions of sending or receiving or communicating in the foregoing method embodiments. The processors and transceivers described in this disclosure may be implemented on integrated circuits (ICs), analog ICs, radio frequency integrated circuits RFICs, mixed signal ICs, application specific integrated circuits (ASICs), printed circuit boards ( printed circuit board (PCB), electronic equipment, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), n-type metal oxide-semiconductor (NMOS), P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

The communication device described in the above embodiments may be a terminal device or a network device (such as the first network device or the second network device in the aforementioned method embodiment), but the scope of the communication device described in the present disclosure is not limited thereto, and The structure of the communication device may not be limited by FIG. 11. The communication device may be a stand-alone device or may be part of a larger device. For example, the communication device may be:

(1) Independent integrated circuit IC, or chip, or chip system or subsystem;

(2) A collection of one or more ICs. Optionally, the IC collection may also include storage components for storing data and computer programs;

(3)ASIC, such as modem;

(4) Modules that can be embedded in other devices;

(5) Receivers, terminal equipment, intelligent terminal equipment, cellular phones, wireless equipment, handheld devices, mobile units, vehicle-mounted equipment, network equipment, cloud equipment, artificial intelligence equipment, etc.;

(6) Others, etc.

For the case where the communication device may be a chip or a chip system, refer to the schematic structural diagram of the chip shown in FIG. 12 . The chip shown in Figure 12 includes a processor 1201 and an interface 1202. The number of processors 1201 may be one or more, and the number of interfaces 1202 may be multiple.

For the case where the chip is used to implement the functions of the first network device in the embodiment of this application:

The interface 112 is used to implement S102 in Figure 2, or is used to implement S103 in Figure 3, or is used to implement S104 in Figure 4, etc.

For the case where the chip is used to implement the functions of the second network device in the embodiment of this application:

The interface 112 is used to implement S106 in Figure 6, or is used to implement S107 in Figure 7, etc.

Optionally, the chip also includes a memory 1203, which is used to store necessary computer programs and data.

Those skilled in the art can also understand that the various illustrative logical blocks and steps listed in the embodiments of the present disclosure can be implemented by electronic hardware, computer software, or a combination of both. Whether such functionality is implemented in hardware or software depends on the specific application and overall system design requirements. Those skilled in the art can use various methods to implement the described functions for each specific application, but such implementation should not be understood as exceeding the scope of protection of the embodiments of the present disclosure.

An embodiment of the present disclosure also provides a communication system, which includes a communication device as a terminal device in the aforementioned embodiment of FIG. 10 and a communication device as a network device (such as the first network device or the second network device in the aforementioned method embodiment). device, or the system includes a communication device as a network device (such as the first network device or the second network device in the foregoing method embodiment) and a communication device as a terminal device in the embodiment of FIG. 11 .

The present disclosure also provides a readable storage medium on which instructions are stored, and when the instructions are executed by a computer, the functions of any of the above method embodiments are implemented.

The present disclosure also provides a computer program product, which, when executed by a computer, implements the functions of any of the above method embodiments.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, the processes or functions described in accordance with the embodiments of the present disclosure are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program may be stored in or transferred from one computer-readable storage medium to another, for example, the computer program may be transferred from a website, computer, server, or data center Transmission to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more available media integrated. The usable media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., high-density digital video discs (DVD)), or semiconductor media (e.g., solid state disks, SSD)) etc.

Those of ordinary skill in the art can understand that the first, second, and other numerical numbers involved in this disclosure are only for convenience of description and are not used to limit the scope of the embodiments of the disclosure, nor to indicate the order.

At least one in the present disclosure can also be described as one or more, and the plurality can be two, three, four or more, and the present disclosure is not limited. In the embodiment of the present disclosure, for a technical feature, the technical feature is distinguished by “first”, “second”, “third”, “A”, “B”, “C” and “D” etc. The technical features described in "first", "second", "third", "A", "B", "C" and "D" are in no particular order or order.

The corresponding relationships shown in each table in this disclosure can be configured or predefined. The values of the information in each table are only examples and can be configured as other values, which is not limited by this disclosure. When configuring the correspondence between information and each parameter, it is not necessarily required to configure all the correspondences shown in each table. For example, in the table in this disclosure, the corresponding relationships shown in some rows may not be configured. For another example, appropriate deformation adjustments can be made based on the above table, such as splitting, merging, etc. The names of the parameters shown in the titles of the above tables may also be other names understandable by the communication device, and the values or expressions of the parameters may also be other values or expressions understandable by the communication device. When implementing the above tables, other data structures can also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash tables. wait.

Predefinition in this disclosure may be understood as definition, pre-definition, storage, pre-storage, pre-negotiation, pre-configuration, solidification, or pre-burning.

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.

The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure. should be covered by the protection scope of this disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

A cause indication method, characterized in that it is executed by a first network device, and the method includes:

Indicate the reason to the second network device, or obtain the reason indicated by the second network device;

Wherein, the reason is used to indicate sidelink SL path switching related information and/or indicate sidelink SL relay related information.
The method of claim 1, wherein indicating the reason to the second network device or obtaining the reason indicated by the second network device includes:

Send a first message to the second network device, wherein the first message includes the reason; or

Receive a second message sent by the second network device, where the second message contains the indicated reason.
The method of claim 2, wherein the first message or the second message includes at least one of the following:

Switch request message;

Switch preparation failure message;

Serial number SN status transfer message;

Toggle cancel message.
The method of claim 1, wherein the information indicating sidelink SL path switching includes at least one of the following:

Indicate sidelink SL path switching;

Indicates that the timer related to path switching has expired;

Indicates path switching configuration changes;

Indicates that the reason for requesting a path switch is radio-related;

Indicates that the reason for canceling the path switch is radio related;

Indicates partial path switching.
The method of claim 1, wherein the information indicating sidelink SL relay-related information includes at least one of the following:

Indicates that the relay is unavailable;

Indicates that the relay is not supported;

Instruction relay is not allowed;

Indicate that resources reserved for the first terminal device configured as a remote terminal device are changed;

indicating that a second terminal device determined for a first terminal device configured as a remote terminal device is changed, wherein said second terminal device provides a relay function;

Indicate failure to configure the second terminal device;

Instruct the second terminal device to lose connection;

Indicates that the first terminal device loses connection.
The method of claim 1, wherein indicating the reason to the second network device includes:

In response to the occurrence of the setting event, a cause indicating the occurrence of the setting event is sent to the second network device.
The method of claim 6, wherein the setting event includes at least one of the following:

Send a first designated message to the second network device;

A second designated message sent by the second network device is received.
The method of claim 7, wherein:

If the first specified message is a switching request message, the reason is used to indicate that the reason for requesting path switching is related to the radio.
The method of claim 7, wherein:

If the second specified message is a handover preparation failure message, the reason is used to indicate at least one of the following:

Indicates that the relay is unavailable;

Indicates that the relay is not supported;

Instruction relay is not allowed;

Indicates that the timer related to path switching has expired;

Indicates that the second terminal device has lost connection, wherein the second terminal device provides a relay function.
The method of claim 1, wherein the reason is at least one of the following:

Wireless network layer reasons;

Transport layer reasons;

Protocol layer reasons.
The method according to any one of claims 1 to 10, wherein the value of the cause is used to indicate sidelink SL path switching related information and/or to indicate sidelink SL relay related information. .
A cause indication method, characterized in that it is executed by a second network device, and the method includes:

Obtain the reason indicated by the first network device, or indicate the reason to the first network device;

Wherein, the reason is used to indicate sidelink SL path switching related information and/or indicate sidelink SL relay related information.
The method of claim 12, wherein the obtaining the reason indicated by the first network device or indicating the reason to the first network device includes:

Receive the first message sent by the first network device, wherein the first message contains the reason; or

Send a second message to the first network device, wherein the second message includes the indicated reason.
The method of claim 13, wherein the first message or the second message includes at least one of the following:

Switch request message;

Switch preparation failure message;

Serial number SN status transfer message;

Toggle cancel message.
The method of claim 12, wherein the information indicating sidelink SL path switching includes at least one of the following:

Indicate sidelink SL path switching;

Indicates that the timer related to path switching has expired;

Indicates path switching configuration changes;

Indicates that the reason for requesting a path switch is radio-related;

Indicates that the reason for canceling the path switch is radio related;

Indicates partial path switching.
The method of claim 12, wherein the information indicating sidelink SL relay related information includes at least one of the following:

Indicates that the relay is unavailable;

Indicates that the relay is not supported;

Instruction relay is not allowed;

Indicate that resources reserved for the first terminal device configured as a remote terminal device are changed;

indicating that a second terminal device determined for a first terminal device configured as a remote terminal device is changed, wherein said second terminal device provides a relay function;

Indicate failure to configure the second terminal device;

Instruct the second terminal device to lose connection;

Indicates that the first terminal device loses connection.
The method of claim 12, wherein the reason for obtaining the first network device indication includes:

Receive a cause sent by the first network device indicating the occurrence of a setting event, wherein the cause is sent by the first network device in response to the occurrence of the setting event.
The method of claim 17, further comprising:

Receive the first designated message sent by the first network device; or

Send a second designated message to the first network device.
The method of claim 18, wherein,

If the first specified message is a switching request message, the reason is used to indicate that the reason for requesting path switching is related to the radio and/or to indicate that the reason for canceling the path switching is related to the radio.
The method of claim 18, wherein,

If the second designated message is a handover preparation failure message, the reason is used to indicate at least one of the following:

Indicates that the relay is unavailable;

Indicates that the relay is not supported;

Instruction relay is not allowed;

Indicates that the timer related to path switching has expired;

Indicates that the second terminal device has lost connection, wherein the second terminal device provides a relay function.
The method of claim 12, wherein the reason is at least one of the following:

Wireless network layer reasons;

Transport layer reasons;

Protocol layer reasons.
The method according to any one of claims 12 to 21, wherein the value of the cause is used to indicate sidelink SL path switching related information and/or to indicate sidelink SL relay related information. .
A communication device, characterized in that the device includes:

A transceiver module, configured to indicate the reason to the second network device, or obtain the reason indicated by the second network device;

Wherein, the reason is used to indicate sidelink SL path switching related information and/or indicate sidelink SL relay related information.
A communication device, characterized in that the device includes:

A transceiver module, configured to obtain the reason indicated by the first network device, or indicate the reason to the first network device;

Wherein, the reason is used to indicate sidelink SL path switching related information and/or indicate sidelink SL relay related information.
A communication device, characterized in that the device includes a processor and a memory, a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the device executes the claims The method described in any one of 1-11.
A communication device, characterized in that the device includes a processor and a memory, a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the device executes the claims The method described in any one of 12-22.
A computer-readable storage medium for storing instructions, which when executed, enables the method according to any one of claims 1 to 11 to be implemented.
A computer-readable storage medium configured to store instructions that, when executed, enable the method according to any one of claims 12 to 22 to be implemented.