WO2023164851A1

WO2023164851A1 - Sidelink monitoring method and apparatus

Info

Publication number: WO2023164851A1
Application number: PCT/CN2022/078904
Authority: WO
Inventors: 杨星
Original assignee: 北京小米移动软件有限公司
Priority date: 2022-03-02
Filing date: 2022-03-02
Publication date: 2023-09-07
Also published as: CN114731719A

Abstract

Disclosed in embodiments of the present application are a sidelink monitoring method and apparatus. In response to sending a first signal, a first terminal device enters an activated state, and in the activated state, the first terminal device monitors transmission of a sidelink, such that the terminal device is controlled to monitor the sidelink, data transmission failure or delay caused by the fact that the terminal device cannot receive a reply of an opposite terminal device based on the first signal after sending the first signal is effectively avoided, the communication efficiency of sidelink transmission is effectively improved, the communication quality of the sidelink transmission is improved, the power consumption of the terminal device is saved, and the endurance of the terminal device is improved.

Description

Sidelink monitoring method and device

technical field

The present application relates to the technical field of communications, in particular to a sidelink monitoring method and device.

Background technique

In a communication system, in order to support direct communication between terminal devices, a sidelink (sidelink) communication manner is introduced. In order to save the power consumption of the terminal equipment in the sidelink, Discontinuous Reception (DRX) of the sidelink was introduced in R17, and the receiving UE (User Equipment, user equipment) only listens to the PSCCH (PysicalSidelink) during the activation time. Control Channel, physical sidelink control channel), the sending UE only sends sidelink data during the activation time.

In some cases, after sending data, a sidelink terminal device needs to receive a reply from the peer terminal device, but the peer terminal device may not reply immediately, and the DRX-configured terminal device may not be able to A reply was received, causing the communication to fail.

Contents of the invention

The embodiment of the first aspect of the present application proposes a sidelink monitoring method, the method is executed by the first terminal device, and the method includes:

In response to sending a first signal, the first terminal device enters an active state;

In the active state, the first terminal listens to sidelink transmissions.

Optionally, the first signal includes: a coordination information request between terminal devices or a first discovery signal.

Optionally, the entering the first terminal device into the activation state in response to sending the first signal includes:

in response to sending said first signal, starting a first timer;

In response to the running period of the first timer, the first terminal device remains activated.

Optionally, the starting a first timer in response to sending the first signal includes:

in response to sending said first signal, starting a second timer;

In response to the second timer expiring, a first timer is started.

Optionally, the first signal is a coordination information request between terminal devices, and the method further includes:

In response to receiving the inter-terminal device coordination information sent by the second terminal device, the terminal device exits the activation state.

Optionally, the first signal is a first discovery signal, and the method further includes:

In response to receiving the second discovery signal sent by the second terminal device, the terminal device exits the activation state.

In response to receiving the inter-terminal device coordination information sent by the second terminal device, the first timer is stopped, and the first terminal device exits the activation state.

In response to receiving the second discovery signal sent by the second terminal device, the first timer is stopped, and the first terminal device exits the activation state.

Optionally, the method also includes:

receiving a sidelink radio resource control message sent by the second terminal device;

Determine the length of the first timer and/or the length of the second timer according to the sidelink radio resource control message.

Optionally, the method also includes:

Determine the length of the first timer and/or the length of the second timer according to the configuration information of the resource pool that sends the first signal.

Determine the length of the first timer and/or the length of the second timer according to the characteristic information corresponding to the first discovery signal.

Optionally, the method also includes:

In response to the duration of the first terminal device entering the activation state reaching a preset delay limit, the first terminal device exits the activation state.

Optionally, the preset delay limit includes: a delay limit of coordination information between terminal devices, or a delay limit of a sidelink discovery process.

Optionally, the terminal device monitors the transmission of the sidelink, including:

The terminal device monitors a physical sidelink control channel PSCCH, and/or the terminal device monitors sidelink control information SCI in a physical sidelink shared channel PSSCH.

The embodiment of the second aspect of the present application proposes a sidelink monitoring device, the device is applied to a first terminal device, and the device includes:

a processing unit, configured to, in response to sending a first signal, enter the first terminal device into an activation state;

A transceiver unit, configured to, in the activated state, monitor the transmission of the sidelink by the first terminal device.

Optionally, the processing unit is specifically configured to:

in response to sending said first signal, starting a first timer;

Optionally, the processing unit is specifically configured to:

in response to sending said first signal, starting a second timer;

In response to the second timer expiring, a first timer is started.

Optionally, the first signal is a coordination information request between terminal devices, and the processing unit is further configured to:

Optionally, the first signal is a first discovery signal, and the processing unit is further configured to:

Optionally, the processing unit is also used for:

Determine the length of the first timer and/or the length of the second timer according to the feature information corresponding to the first discovery signal.

Optionally, the processing unit is also used for:

Optionally, the preset delay limit includes: a delay limit for coordination information between terminal devices, or a delay limit for a sidelink discovery process.

Optionally, the transceiver unit is specifically configured to:

The embodiment of the third aspect of the present application provides a communication device, 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 The device executes the sidelink monitoring method described in the embodiment of the first aspect above.

The embodiment of the fourth aspect of the present application 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, and the processor is used to run the code instructions to make the The device executes the sidelink monitoring method described in the embodiment of the first aspect above.

The embodiment of the fifth aspect of the present application provides a computer-readable storage medium for storing instructions, and when the instructions are executed, the sidelink monitoring method described in the embodiment of the first aspect above is implemented.

The embodiment of the sixth aspect of the present application provides a computer program, which, when running on a computer, causes the computer to execute the sidelink monitoring assignment method described in the embodiment of the first aspect.

In the sidelink monitoring method and device provided in the embodiments of the present application, the first terminal device enters the activation state in response to sending the first signal, and in the activation state, the first terminal device monitors the transmission of the sidelink , can control the monitoring of the terminal device on the sidelink, effectively avoiding the data transmission failure or delay caused by the inability of the terminal device to receive the reply based on the first signal after the terminal device sends the first signal, effectively The communication efficiency of the sidelink transmission is improved, the communication quality of the sidelink transmission is improved, the power consumption of the terminal equipment is saved, and the battery life of the terminal equipment is improved.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiment of the present application or the background art, the following will describe the drawings that need to be used in the embodiment of the present application or the background art.

Fig. 1a is a schematic structural diagram of a communication system provided by an embodiment of the present application;

FIG. 1b is a schematic structural diagram of another communication system provided by an embodiment of the present application;

FIG. 2 is a schematic flowchart of a sidelink monitoring method provided by an embodiment of the present application;

FIG. 3 is a schematic flowchart of another sidelink monitoring method provided by an embodiment of the present application;

FIG. 4 is a schematic flowchart of another sidelink monitoring method provided by an embodiment of the present application;

FIG. 5 is a schematic flowchart of another sidelink monitoring method provided by an embodiment of the present application;

FIG. 6 is a schematic flowchart of another sidelink monitoring method provided by an embodiment of the present application;

FIG. 7 is a schematic flowchart of another sidelink monitoring method provided by an embodiment of the present application;

FIG. 8 is a schematic flowchart of another sidelink monitoring method provided by an embodiment of the present application;

FIG. 9 is a schematic flowchart of another sidelink monitoring method provided by an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a sidelink monitoring device provided by an embodiment of the present application;

FIG. 11 is a schematic structural diagram of another sidelink monitoring device provided by an embodiment of the present application;

FIG. 12 is a schematic structural diagram of a chip provided by an embodiment of the present application.

Detailed ways

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals 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 the embodiments of the present application. Rather, they are merely examples of apparatus and methods consistent with aspects of the embodiments of the present application as recited in the appended claims.

The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms "a" and "the" used in the embodiments of this application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should 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 terms such as first, second, and third may be used in the embodiment of the present application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of the embodiments of the present application, first information may also be called second information, and similarly, second information may also be called first information. Depending on the context, the words "if" and "if" as used herein may be interpreted as "at" or "when" or "in response to a determination."

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals designate the same or similar elements throughout. The embodiments described below by referring to the figures are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application.

In order to better understand a clock synchronization method disclosed in the embodiment of the present application, the communication system to which the embodiment of the present application is applicable is firstly described below.

Please refer to FIG. 1a and FIG. 1b. FIG. 1a is a schematic diagram of an architecture of a communication system provided by an embodiment of this application, and FIG. 1b is a schematic diagram of an architecture of another communication system provided by an embodiment of this application. The communication system may include, but is not limited to, two terminal devices. The number and form of the devices shown in Figure 1a and Figure 1b are for example only and do not constitute a limitation to the embodiment of the application. In practical applications, more than two terminal devices may be included. . The communication system shown in FIG. 1 a and FIG. 1 b includes three terminal devices 101 , 102 and 103 as an example.

It should be noted that the technical solutions of the embodiments of the present application may be applied to various communication systems. For example: Long Term Evolution (LTE) system, fifth-generation mobile communication system, 5G new air interface system, or other future new mobile communication systems.

The terminal device 101, the terminal device 102 and the terminal device 103 in the embodiment of the present application are entities on the user side for receiving or transmitting signals, such as mobile phones. The terminal equipment may also be called terminal equipment (terminal), user equipment (user equipment, UE), mobile station (Mobile Station, MS), mobile terminal equipment (Mobile Terminal, MT) and so on. The terminal device can be a car with communication functions, a smart car, a mobile phone (Mobile Phone), a wearable device, a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (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 devices in Smart Grid, wireless terminal devices in Transportation Safety, wireless terminal devices in Smart City, wireless terminal devices in Smart Home, etc. The embodiment of the present application does not limit the specific technology and specific device form adopted by the terminal device.

In a communication system, in order to support direct communication between terminal devices, a sidelink (sidelink) communication manner is introduced. In order to save the power consumption of the terminal equipment in the sidelink, Discontinuous Reception (DRX) of the sidelink was introduced in R17, and the receiving UE (User Equipment, user equipment) only listens to the PSCCH (PysicalSidelink) during the activation time. Control Channel, physical sidelink control channel), in order to avoid data loss, the sending UE only sends sidelink data during the activation time. When the terminal device sends sidelink CSI MAC CE ((CSI, Channel State Information, channel state information) (MAC, Medium Access Control, media access control layer) (CE, Control Element, control element, or control unit)) It will enter the active state and receive the CSI measurement report sent by the peer terminal device.

As shown in FIG. 1a , in FIG. 1a , when the terminal device 101 selects sidelink transmission resources, in order to avoid collisions, the terminal device 101 needs to sense resources and avoid selecting resources already reserved by other terminal devices. However, sometimes the perception of the terminal device 101 may not be realized, for example, some terminal devices do not have the perception capability, or the half-duplex terminal device cannot perceive all resources. In this scenario, other terminal devices (such as terminal device 102 and terminal device 103) can send the inter-device coordination information obtained after sensing to the terminal device 101, and the terminal device 101 selects transmission resources based on the inter-device coordination information . The coordination information between terminal devices may include detected conflicting resources, resources that cannot be selected, or resources that can be selected. The coordination information between terminal devices may be carried in SL (sidelink, sidelink) MACCE or SCI (sidelink control information, sidelink control information) and sent to the terminal device 101 through the sidelink. The terminal device 101 may send an inter-terminal device coordination information request to the terminal device 102 and the terminal device 103, and the terminal device 102 and the terminal device 103 send the inter-terminal device coordination information to the terminal device 101 after receiving the request.

In a communication system, a terminal device may not be directly connected to a network device, but communicates with a network device through the relay of another terminal device. A terminal device that is not directly connected to a network device is called a remote terminal device ( remote UE), the terminal device that provides the relay function is called a relay terminal device (relay UE), and the remote terminal device and the relay terminal device also communicate through sidelink.

The relay terminal device and the remote terminal device can discover each other through a discovery (discovery) process, and after the discovery process is started, the terminal device can send or receive a discovery signal. The discovery signal carries information such as the identity of the serving cell of the terminal equipment and the identity of the terminal equipment.

The discovery process has two modes, mode A and B. All discovery messages are carried via discovery signals.

The process of mode B is shown in FIG. 1b. The terminal device 101 (also called discoverer) sends a solicitation message, which may carry discovery type, inquiry code, security protection information, etc. After other terminal devices (terminal device 102 and terminal device 103 (also referred to as discoveree)) receive the solicitation message, the terminal device 102 matching the solicitation message sends a reply message to complete the discovery process.

In some cases, after terminal device 101 sends an inter-device coordination information request, terminal device 102 and terminal device 103 may not immediately send inter-device coordination information, for example, terminal device 102 and terminal device 103 may need to perform resource selection or Resource awareness. If the terminal device 101 is configured with DRX, the terminal device 101 may have entered the sleep state at this time, unable to receive the inter-terminal device coordination information sent by the terminal device 102 and the terminal device 103, so that resource selection cannot be performed, resulting in delayed transmission. If the delay exceeds The maximum delay of the data to be sent, the data to be sent will be discarded.

After the terminal device 101 sends the discovery signal (mode B), the terminal device 102 and the terminal device 103 may not reply the discovery signal immediately, for example, the terminal device 102 and the terminal device 103 may need to perform resource selection or uplink transmission first. If the terminal device 101 is configured with DRX, the terminal device 101 may have entered a sleep state at this time and cannot receive the discovery signals sent by the terminal device 102 and the terminal device 103, so that the discovery process cannot be completed, resulting in communication delay or even failure.

It can be understood that the communication system described in the embodiment of the present application is to illustrate the technical solution of the embodiment of the present application more clearly, and does not constitute a limitation to the technical solution provided in the embodiment of the present application. With the evolution of the system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

The sidelink monitoring method and device thereof provided by the present application will be described in detail below with reference to the accompanying drawings.

Please refer to FIG. 2 . FIG. 2 is a schematic flowchart of a sidelink monitoring method provided by an embodiment of the present application. It should be noted that, the sidelink monitoring method in the embodiment of the present application is executed by the first terminal device. As shown in Figure 2, the method may include the following steps:

Step 201, in response to sending a first signal, the first terminal device enters an activation state.

After sending the first signal, the terminal device enters the activation state, and monitors the transmission of the sidelink sidelink in the activation state, which can effectively avoid being unable to receive a reply based on the first signal from the opposite terminal device.

Wherein, in the embodiment of the present application, the first signal is used for inter-terminal communication and is transmitted on a sidelink.

Optionally, the first signal includes a coordination information request between terminal devices or a first discovery signal.

As mentioned above, the first terminal device sends an inter-terminal device coordination information request, and the peer terminal device (second terminal device) sends the inter-terminal device coordination information to the first terminal device based on the request; the first terminal device sends the second terminal device A discovery signal, the peer terminal device (second terminal device) sends a second discovery signal to the first terminal device based on the first discovery signal, that is, the second discovery signal is based on the peer terminal device (second terminal device) A reply sent by the first discovery signal to the first terminal device.

It can be understood that there may be at least one second terminal device in the communication system of the embodiment of the present application, and can send a reply to the first terminal device based on the first signal sent by the first terminal device.

In some implementations, the first terminal device can enter and maintain the active state by starting a timer.

In some implementation manners, the first terminal device starts the first timer after sending the first signal, and keeps an active state during the running of the first timer, and monitors the transmission of the sidelink.

In some embodiments, the first terminal device starts the second timer after sending the first signal, starts the first timer after the second timer expires, and keeps the active state during the running of the first timer, Listen for sidelink transmissions. The second timer is used to start the first timer. During the running of the second timer, the first terminal device may or may not be kept in an activated state, which can save power consumption of the first terminal device.

Step 202, in the activated state, the first terminal device monitors the transmission of the sidelink.

The first terminal device in the activated state can monitor the transmission of the sidelink, and can receive a reply based on the first signal sent by the opposite terminal device (second terminal device) during the period.

As a first possible implementation manner, the first terminal device monitoring the transmission of the sidelink includes: the first terminal device monitoring a physical sidelink control channel PSCCH (PysicalSidelink Control Channel).

As a second possible implementation, the first terminal device monitoring the transmission of the sidelink includes: the first terminal device monitors the sidelink control information SCI in the physical sidelink shared channel PSSCH (PysicalSidelink SharedChannel). (sidelink control information).

As a third possible implementation manner, the first terminal device monitoring the transmission of the sidelink includes: the first terminal device monitors the physical sidelink control channel PSCCH, and the sidelink control channel in the physical sidelink shared channel PSSCH Link Control Information SCI.

In the embodiment of the present application, the first terminal device monitors the transmission of the sidelink in the activated state, and can exit the activated state when the preset condition is met, saving the power consumption of the terminal device and improving the battery life of the terminal device.

In some implementation manners, in response to the first terminal device receiving the reply sent by the second terminal device based on the first signal, the first terminal device exits the activation state.

It can be understood that when the first signal is a request for coordination information between terminal devices, the reply based on the first signal is coordination information between terminal devices; when the first signal is a first discovery signal, the reply based on the first signal is a second discovery Signal.

In some implementation manners, in response to a time period during which the first terminal device enters the activated state reaches a preset delay limit, the first terminal device exits the activated state.

To sum up, by responding to sending the first signal, the first terminal device enters the activation state, and in the activation state, the first terminal device monitors the transmission of the sidelink, which can control the terminal device to monitor the sidelink link, effectively avoiding After the terminal device sends the first signal, the data transmission failure or delay caused by the inability to receive the reply of the opposite terminal device based on the first signal effectively improves the communication efficiency of the sidelink transmission and improves the sidelink transmission efficiency. The communication quality of road transmission can be improved, the power consumption of terminal equipment can be saved, and the battery life of terminal equipment can be improved.

Please refer to FIG. 3 . FIG. 3 is a schematic flowchart of a sidelink monitoring method provided by an embodiment of the present application. It should be noted that, the sidelink monitoring method in the embodiment of the present application is executed by the first terminal device. As shown in Figure 3, the method may include the following steps:

Step 301, in response to sending a coordination information request between terminal devices, the first terminal device enters an activation state.

After sending the inter-terminal device coordination information request, the first terminal device enters the activation state and monitors the transmission of the sidelink sidelink in the activated state, which can effectively avoid the failure of receiving the response from the second terminal device based on the request between terminal devices. coordinate information.

It can be understood that there may be at least one second terminal device in the communication system of the embodiment of the present application, and can send the inter-terminal device coordination information to the first terminal device based on the inter-terminal device coordination information request sent by the first terminal device.

Wherein, the coordination information between terminal devices may include detected conflicting resources, unselectable resources or selectable resources. The first terminal device can select a sending resource according to the inter-terminal device coordination information.

Step 302, in the active state, the first terminal device monitors the transmission of the sidelink.

The first terminal device in the activated state can monitor the transmission of the sidelink, and can receive the inter-terminal device coordination information sent by the second terminal device during the period.

As a first possible implementation manner, the monitoring of the transmission of the sidelink by the first terminal device includes: monitoring the physical sidelink control channel PSCCH by the first terminal device.

As a second possible implementation manner, the monitoring of the transmission of the sidelink by the first terminal device includes: the first terminal device monitors the sidelink control information SCI in the physical sidelink shared channel PSSCH.

Step 303, in response to receiving the coordination information between terminal devices sent by the second terminal device, the first terminal device exits the activation state.

During the process of monitoring the transmission of the sidelink, if the first terminal device receives the coordination information between the terminal devices sent by the second terminal device, the first terminal device can select the transmission resource according to the coordination information between the terminal devices. End devices can exit the activation state.

To sum up, by responding to the coordination information request sent by the terminal device, the first terminal device enters the activation state. In the activation state, the first terminal device monitors the transmission of the sidelink, and responds to receiving the terminal Inter-device coordination information, the first terminal device exits the activation state, and can control the terminal device to monitor the sidelink link, effectively preventing the terminal device from receiving the first signal based on the first signal after the terminal device sends the first signal. Reply, the data transmission failure or delay caused by this effectively improves the communication efficiency of the sidelink transmission, improves the communication quality of the sidelink transmission, saves the power consumption of the terminal equipment, and improves the battery life of the terminal equipment.

Please refer to FIG. 4 . FIG. 4 is a schematic flowchart of a sidelink monitoring method provided in an embodiment of the present application. It should be noted that, the sidelink monitoring method in the embodiment of the present application is executed by the first terminal device. As shown in Figure 4, the method may include the following steps:

Step 401, in response to sending a first discovery signal, the first terminal device enters an activation state.

After sending the first discovery signal, the first terminal device enters the activation state, and monitors the sidelink transmission in the activation state, which can effectively avoid failing to receive the second discovery signal replied by the second terminal device based on the request.

It can be understood that there may be at least one second terminal device in the communication system of the embodiment of the present application, and can send a second discovery signal to the first terminal device based on the first discovery signal sent by the first terminal device.

Wherein, the first discovery signal is used for mutual discovery between the first terminal device and the second terminal device, and the first discovery signal may carry information such as a serving cell identifier of the first terminal device, a terminal device identifier of the first terminal device, and the like. The first discovery signal may also include a discovery type, an inquiry code, security protection information, and the like.

In some implementations, the first discovery signal corresponds to the discovery type, and the first discovery signal is configured to perform a discovery process corresponding to the discovery type, and the first discovery signal does not need to carry information about the discovery type. Different discovery types may correspond to different first discovery signals.

The second discovery signal is used for mutual discovery between the first terminal device and the second terminal device, and the second discovery signal may carry information such as a serving cell identifier of the second terminal device and a terminal device identifier of the second terminal device.

It should be noted that, in this embodiment of the present application, the first terminal device may be a remote terminal device, or may be a relay terminal device.

Step 402, in the active state, the first terminal device monitors the transmission of the sidelink.

The first terminal device in the activated state can monitor the transmission of the sidelink, and can receive the second discovery signal sent by the second terminal device during the period.

Step 403, in response to receiving the second discovery signal sent by the second terminal device, the first terminal device exits the activation state.

During the process of monitoring the transmission of the sidelink, if the first terminal device receives the second discovery signal sent by the second terminal device, and the discovery process is completed, the first terminal device may exit the activation state.

To sum up, by responding to sending the first discovery signal, the first terminal device enters the activation state. In the activation state, the first terminal device monitors the transmission of the sidelink, and responds to receiving the second discovery signal sent by the second terminal device. signal, the first terminal device exits the activation state, and can control the terminal device to monitor the sidelink, which effectively prevents the terminal device from receiving the reply based on the first signal from the opposite terminal device after sending the first signal. The resulting data transmission failure or delay effectively improves the communication efficiency of the sidelink transmission, improves the communication quality of the sidelink transmission, saves the power consumption of the terminal equipment, and improves the battery life of the terminal equipment.

Please refer to FIG. 5 . FIG. 5 is a schematic flowchart of a sidelink monitoring method provided by an embodiment of the present application. It should be noted that, the sidelink monitoring method in the embodiment of the present application is executed by the first terminal device. As shown in Figure 5, the method may include the following steps:

Step 501, in response to sending a request for coordination information between terminal devices, start a first timer.

After the first terminal device sends the inter-terminal device coordination information request, it starts a first timer, and the first terminal device remains activated during the running of the first timer.

It can also be understood that there may be at least one second terminal device in the communication system of the embodiment of the present application, and can send the coordination information between terminal devices to the first terminal device based on the coordination information request between the terminal devices sent by the first terminal device . Wherein, the coordination information between terminal devices may include detected conflicting resources, unselectable resources or selectable resources. The first terminal device can select a transmission resource according to the inter-terminal device coordination information.

Step 502, in response to the running period of the first timer, the first terminal device remains in an active state.

After the first timer is started, the first terminal device remains active during the running of the first timer, and monitors the transmission of the sidelink sidelink, which can effectively avoid the coordination between terminal devices that cannot receive the reply of the second terminal device based on the request information.

In this embodiment of the present application, the first terminal device can determine the length of the first timer, that is, the running time of the first timer. During the running of the first timer, the first terminal device remains activated.

In some embodiments, the first terminal device can receive a sidelink radio resource control (sidelink RRC (Radio Resource Control, radio resource control)) message sent by the second terminal device, and the first terminal device can The link RRC message determines the length of the first timer.

In some implementation manners, the first terminal device can determine the length of the first timer according to the configuration information of the resource pool that sends the inter-terminal device coordination information request.

Step 503, in the activated state, the first terminal device monitors the transmission of the sidelink.

Step 504, in response to receiving the inter-terminal device coordination information sent by the second terminal device, stop the first timer, and the first terminal device exits the activation state.

During the process of monitoring the transmission of the sidelink, if the first terminal device receives the inter-terminal coordination information sent by the second terminal device, the first terminal device can select transmission resources according to the inter-terminal coordination information, and can stop In the first timer, the first terminal device exits the activation state.

To sum up, the first timer is started in response to sending the coordination information request between the terminal devices, and the first terminal device remains in the activated state during the running of the first timer, and in the activated state, the first terminal device monitors the sidelink In response to receiving the inter-terminal coordination information sent by the second terminal device, the first timer is stopped, and the first terminal device exits the activation state, which can control the terminal device to monitor the sidelink, effectively avoiding the terminal After the device sends the first signal, the data transmission fails or is delayed because it cannot receive the reply from the peer terminal device based on the first signal, which effectively improves the communication efficiency of the sidelink transmission and improves the sidelink transmission. Excellent communication quality, save power consumption of terminal equipment, and improve battery life of terminal equipment.

Please refer to FIG. 6 . FIG. 6 is a schematic flowchart of a sidelink monitoring method provided by an embodiment of the present application. It should be noted that, the sidelink monitoring method in the embodiment of the present application is executed by the first terminal device. As shown in Figure 6, the method may include the following steps:

Step 601: Start a first timer in response to sending a first discovery signal.

After sending the first discovery signal, the first terminal device starts a first timer, and the first terminal device remains in an active state during the running of the first timer.

Step 602, in response to the running period of the first timer, the first terminal device remains in an active state.

After the first timer is started, the first terminal device remains active during the running of the first timer, and monitors the transmission of the sidelink sidelink, which can effectively avoid being unable to receive the second discovery signal replied by the second terminal device based on the request .

In some implementation manners, the first terminal device can receive the sidelink RRC message sent by the second terminal device, and the first terminal device determines the length of the first timer according to the received sidelink RRC message.

In some implementation manners, the first terminal device can determine the length of the first timer according to the configuration information of the resource pool that sends the first discovery signal.

In some implementation manners, the first terminal device can determine the length of the first timer according to the feature information corresponding to the first discovery signal.

Optionally, the feature information corresponding to the first discovery signal includes a discovery type or an inquiry code.

It should be noted that, the discovery type corresponding to the first discovery signal may determine the corresponding relationship through the discovery type carried in the first discovery signal, or it may be that the first discovery signal is configured to perform the discovery of the corresponding discovery type. The configuration of the process to determine the correspondence. Wherein, the discovery type may include direct discovery, relay discovery, and the like.

In this embodiment of the present application, the inquiry code corresponding to the first discovery signal may be the inquiry code carried in the first discovery signal.

Step 603, in the activated state, the first terminal device monitors the transmission of the sidelink.

Step 604, in response to receiving the second discovery signal sent by the second terminal device, stop the first timer, and the first terminal device exits the activation state.

In the process of monitoring the transmission of the sidelink, if the first terminal device receives the second discovery signal sent by the second terminal device and completes the discovery process, it may stop the first timer, and the first terminal device exits the activation state.

To sum up, by starting the first timer in response to sending the first discovery signal, in response to the running of the first timer, the first terminal device remains in the active state, and in the active state, the first terminal device monitors the sidelink link Transmission, in response to receiving the second discovery signal sent by the second terminal device, stop the first timer, the first terminal device exits the activation state, and can control the terminal device to monitor the sidelink, effectively preventing the terminal device from sending After the first signal, the data transmission failure or delay caused by the inability to receive the response from the peer terminal device based on the first signal effectively improves the communication efficiency of the sidelink transmission and improves the communication quality of the sidelink transmission , save the power consumption of the terminal equipment, and improve the battery life of the terminal equipment.

Please refer to FIG. 7 . FIG. 7 is a schematic flowchart of a sidelink monitoring method provided in an embodiment of the present application. It should be noted that, the sidelink monitoring method in the embodiment of the present application is executed by the first terminal device. As shown in Figure 7, the method may include the following steps:

Step 701: Start a second timer in response to sending a request for coordination information between terminal devices.

After the first terminal device sends the inter-terminal device coordination information request, it starts the second timer. In the embodiment of the present application, the second timer is used to start the first timer.

In this embodiment of the present application, optionally, during the running of the second timer, the first terminal device may not need to remain in an active state, which can further save power consumption of the terminal device and increase battery life of the terminal device.

Step 702, start the first timer in response to the timeout of the second timer.

The first terminal device starts the second timer after sending the inter-terminal device coordination information request, and starts the first timer after the second timer expires, and the first terminal device remains active during the running of the first timer.

Step 703, in response to the running period of the first timer, the first terminal device remains activated.

In this embodiment of the application, the first terminal device can determine the length of the first timer and the length of the second timer, that is, the running duration of the first timer and the running duration of the second timer. After the timeout, the first timer is started, and during the running of the first timer, the first terminal device remains in an active state.

In some embodiments, the first terminal device can receive the sidelink RRC message sent by the second terminal device, and the first terminal device determines the length of the first timer and the second timing according to the received sidelink RRC message the length of the device.

In some implementation manners, the first terminal device can determine the length of the first timer and the length of the second timer according to the configuration information of the resource pool that sends the inter-terminal device coordination information request.

Step 704, in the active state, the first terminal device monitors the transmission of the sidelink.

Step 705, in response to receiving the inter-terminal device coordination information sent by the second terminal device, stop the first timer, and the first terminal device exits the activation state.

To sum up, the second timer is started in response to the request for sending coordination information between terminal devices, the first timer is started in response to the second timer being timed out, and the first terminal device remains active during the running of the first timer. , in the active state, the first terminal device monitors the transmission of the sidelink, and in response to receiving the inter-terminal device coordination information sent by the second terminal device, stops the first timer, the first terminal device exits the active state, and can control The monitoring of the side link by the terminal device effectively avoids data transmission failure or delay caused by the inability of the terminal device to receive the reply based on the first signal after the terminal device sends the first signal, and effectively improves the side link. Improve the communication efficiency of the uplink transmission, improve the communication quality of the sidelink transmission, save the power consumption of the terminal equipment, and improve the battery life of the terminal equipment.

Please refer to FIG. 8 . FIG. 8 is a schematic flowchart of a sidelink monitoring method provided by an embodiment of the present application. It should be noted that, the sidelink monitoring method in the embodiment of the present application is executed by the first terminal device. As shown in Figure 8, the method may include the following steps:

Step 801, start a second timer in response to sending a first discovery signal.

After sending the first discovery signal, the first terminal device starts the second timer. In the embodiment of the present application, the second timer is used to start the first timer.

Step 802, start the first timer in response to the timeout of the second timer.

After sending the first discovery signal, the first terminal device starts the second timer, and after the second timer expires, starts the first timer, and the first terminal device remains active during the running of the first timer.

Step 803, in response to the running period of the first timer, the first terminal device remains in an active state.

In this embodiment of the present application, the first terminal device can determine the length of the first timer and/or the length of the second timer, that is, the running time of the first timer and/or the running time of the second timer. After the second timer expires, the first timer is started, and during the running of the first timer, the first terminal device remains activated.

In some embodiments, the first terminal device can receive the sidelink RRC message sent by the second terminal device, and the first terminal device determines the length of the first timer and/or the length of the second timer according to the received sidelink RRC message. The length of the second timer. That is, the first terminal device may determine the length of the first timer according to the sidelink RRC message, or the first terminal device may determine the length of the second timer according to the sidelink RRC message, or, the second A terminal device may determine the length of the first timer and the length of the second timer according to the sidelink RRC message.

In some implementation manners, the first terminal device can determine the length of the first timer and/or the length of the second timer according to the configuration information of the resource pool that sends the first discovery signal. That is, the first terminal device may determine the length of the first timer according to the configuration information of the resource pool that sends the first discovery signal; or, the first terminal device may determine the length of the first timer according to the configuration information of the resource pool that sends the first discovery signal , determine the length of the second timer; or, the first terminal device may determine the length of the first timer and the length of the second timer according to the configuration information of the resource pool that sends the first discovery signal.

In some implementation manners, the first terminal device can determine the length of the first timer and/or the length of the second timer according to the characteristic information corresponding to the first discovery signal. That is, the first terminal device may determine the length of the first timer according to the characteristic information corresponding to the first discovery signal; or, the first terminal device may determine the length of the second timer according to the characteristic information corresponding to the first discovery signal or, the first terminal device may determine the length of the first timer and the length of the second timer according to the feature information corresponding to the first discovery signal.

Step 804, in the active state, the first terminal device monitors the transmission of the sidelink.

Step 805, in response to receiving the second discovery signal sent by the second terminal device, stop the first timer, and the first terminal device exits the activation state.

To sum up, by starting the second timer in response to sending the first discovery signal, starting the first timer in response to the timeout of the second timer, and responding to the fact that the first terminal device remains active during the running of the first timer, In the activated state, the first terminal device monitors the transmission of the sidelink, and in response to receiving the second discovery signal sent by the second terminal device, stops the first timer, the first terminal device exits the activated state, and can control the terminal device to The monitoring of the side link effectively avoids the data transmission failure or delay caused by the inability of the terminal device to receive the reply based on the first signal after the terminal device sends the first signal, and effectively improves the side link. The communication efficiency of transmission improves the communication quality of sidelink transmission, saves the power consumption of terminal equipment, and improves the battery life of terminal equipment.

Please refer to FIG. 9 . FIG. 9 is a schematic flowchart of a sidelink monitoring method provided by an embodiment of the present application. It should be noted that, the sidelink monitoring method in the embodiment of the present application is executed by the first terminal device. As shown in Figure 9, the method may include the following steps:

Step 901, in response to sending a first signal, the first terminal device enters an activation state.

Step 902, in the active state, the first terminal device monitors the transmission of the sidelink.

In the embodiment of the present application, step 901 and step 902 may be implemented in any one of the embodiments of the present application respectively, which is not limited in the embodiment of the present application, and will not be repeated here.

It can be understood that in this embodiment of the present application, the first terminal device enters the activation state, which may include starting the first timer and maintaining the activation state during the running of the first timer, or may include starting the second timer. The first timer is started after the timer expires, and remains active while the first timer is running, and so on. In this embodiment of the present application, the first signal includes a coordination information request between terminal devices or a first discovery signal.

Step 903: In response to the time period for the first terminal device entering the activation state reaching a preset delay limit, the first terminal device exits the activation state.

In this embodiment of the present application, if the duration of the first terminal device entering the activation state reaches a preset time delay limit, the first terminal device exits the activation state.

Wherein, optionally, the preset time delay limit may be predetermined by the protocol, or may be configured for the terminal device.

In some implementations, the preset delay limit includes: a delay limit for coordination information between terminal devices, or a delay limit for a sidelink discovery process.

The delay limitation of the coordination information between terminal devices refers to the requirement on the delay of sending the coordination information between terminal devices, that is, the second terminal device should send the coordination information between terminal devices within the required time delay. The delay limit of the sidelink discovery process refers to the delay requirement of the sidelink discovery process, including the service delay requirement for triggering the discovery message.

To sum up, by responding to sending the first signal, the first terminal device enters the activation state, in the activation state, the first terminal device monitors the transmission of the sidelink, and in response to the duration of the first terminal device entering the activation state reaching a preset Delay limit, the first terminal device exits the activation state, and can control the terminal device to monitor the sidelink, which effectively prevents the terminal device from receiving the reply based on the first signal after the terminal device sends the first signal , resulting in data transmission failure or delay, which effectively improves the communication efficiency of the sidelink transmission, improves the communication quality of the sidelink transmission, saves the power consumption of the terminal equipment, and improves the battery life of the terminal equipment.

Corresponding to the sidelink monitoring method provided in the above several embodiments, the present application also provides a sidelink monitoring device, since the sidelink monitoring device provided in the embodiment of the present application is the same as that provided in the above several embodiments Therefore, the implementation of the sidelink monitoring method is also applicable to the sidelink monitoring device provided in the following embodiments, which will not be described in detail in the following embodiments.

Please refer to FIG. 10 , which is a schematic structural diagram of a sidelink monitoring device provided by an embodiment of the present application.

As shown in FIG. 10 , the sidelink monitoring device 1000 includes: a processing unit 1010, a transceiver unit 1020, wherein:

a processing unit 1010, configured to, in response to sending a first signal, enter the first terminal device into an activation state;

The transceiver unit 1020 is configured to, in the activated state, monitor the transmission of the sidelink by the first terminal device.

Optionally, the processing unit 1010 is specifically configured to:

in response to sending said first signal, starting a first timer;

Optionally, the processing unit 1010 is specifically configured to:

in response to sending said first signal, starting a second timer;

In response to the second timer expiring, a first timer is started.

Optionally, the first signal is a coordination information request between terminal devices, and the processing unit 1010 is further configured to:

Optionally, the first signal is a first discovery signal, and the processing unit 1010 is further configured to:

Optionally, the processing unit 1010 is further configured to:

Optionally, the transceiver unit 1020 is specifically configured to:

In the sidelink monitoring device of this embodiment, the first terminal device enters the activation state in response to sending the first signal, and in the activation state, the first terminal device monitors the transmission of the sidelink link, and can control the terminal device The monitoring of the sidelink can effectively avoid the data transmission failure or delay caused by the inability of the terminal device to receive the reply based on the first signal after the terminal device sends the first signal, which effectively improves the sidelink link. The communication efficiency of road transmission can be improved, the communication quality of side link transmission can be improved, the power consumption of terminal equipment can be saved, and the battery life of terminal equipment can be improved.

In order to realize the above-mentioned embodiments, the embodiment of the present application also proposes a communication device, including: 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 The method shown in the embodiment of Fig. 9 .

In order to realize the above-mentioned embodiments, the embodiment of the present application also proposes a communication device, including: a processor and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to Execute the methods shown in the embodiments shown in FIG. 2 to FIG. 9 .

Please refer to FIG. 11 . FIG. 11 is a schematic structural diagram of another sidelink monitoring device provided by an embodiment of the present application. The sidelink monitoring apparatus 1100 may be a terminal device, or may be a chip, a chip system, or a processor that supports the terminal device to implement the above method. The device can be used to implement the methods described in the above method embodiments, and for details, refer to the descriptions in the above method embodiments.

The sidelink listening device 1100 may include one or more processors 1101 . The processor 1101 may be a general-purpose processor or a special-purpose processor. 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, and the central processor can be used to control sidelink monitoring devices (such as base stations, baseband chips, terminal equipment, terminal equipment chips, DU or CU, etc.) , execute computer programs, and process data for computer programs.

Optionally, the sidelink monitoring device 1100 may further include one or more memories 1102, on which a computer program 1103 may be stored, and the processor 1101 executes the computer program 1103, so that the sidelink monitoring device 1100 executes the above-mentioned Methods described in the Methods Examples. The computer program 1103 may be solidified in the processor 1101, and in this case, the processor 1101 may be implemented by hardware.

Optionally, data may also be stored in the memory 1102 . The sidelink monitoring device 1100 and the memory 1102 can be set separately or integrated together.

Optionally, the sidelink monitoring device 1100 may further include a transceiver 1105 and an antenna 1106 . The transceiver 1105 may be called a transceiver unit, a transceiver, or a transceiver circuit, etc., and is used to implement a transceiver function. The transceiver 1105 may include a receiver and a transmitter, and the receiver may be called a receiver or a receiving circuit for realizing a receiving function; the transmitter may be called a transmitter or a sending circuit for realizing a sending function.

Optionally, the sidelink monitoring device 1100 may further 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 code instructions to enable the sidelink monitoring device 1100 to execute the methods described in the foregoing method embodiments.

In an implementation manner, the processor 1101 may include a transceiver for implementing receiving and sending functions. For example, the transceiver may be a transceiver circuit, or an interface, or an interface circuit. The transceiver circuits, interfaces or interface circuits for realizing the functions of receiving and sending can be separated or integrated together. The above-mentioned transceiver circuit, interface or interface circuit may be used for reading and writing code/data, or the above-mentioned transceiver circuit, interface or interface circuit may be used for signal transmission or transfer.

In an implementation manner, the sidelink monitoring apparatus 1100 may include a circuit, and the circuit may implement the function of sending or receiving or communicating in the foregoing method embodiments. The processors and transceivers described in this application can be implemented in integrated circuits (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 fabricated using various IC process technologies such as complementary metal oxide semiconductor (CMOS), nMetal-oxide-semiconductor (NMOS), P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

The sidelink monitoring device described in the above embodiments may be a network device or a terminal device, but the scope of the sidelink monitoring device described in this application is not limited thereto, and the structure of the sidelink monitoring device may vary Limited by Figures 9-10. The sidelink listening device may be a stand-alone device or may be part of a larger device. Examples of sidelink listening devices could be:

(1) Stand-alone integrated circuits ICs, or chips, or chip systems or subsystems;

(2) A set of one or more ICs, optionally, the set of ICs may also include storage components for storing data and computer programs;

(3) ASIC, such as modem (Modem);

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

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

(6) Others and so on.

For the case where the sidelink monitoring 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 FIG. 12 includes a processor 1201 and an interface 1202 . Wherein, the number of processors 1201 may be one or more, and the number of interfaces 1202 may be more than one.

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

Interface 1202, used to transmit code instructions to the processor;

The processor 1201 is configured to run code instructions to execute the methods shown in FIG. 2 to FIG. 9 .

Optionally, the chip further includes a memory 1203 for storing necessary computer programs and data.

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

The embodiment of the present application also provides a communication system, the system includes the sidelink monitoring device as the terminal equipment in the aforementioned embodiment of Figure 10, or the system includes the sidelink monitoring device as the terminal equipment in the aforementioned Figure 11 embodiment listening device.

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

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

In the above embodiments, all or part of them may be implemented 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. A computer program product consists of one or more computer programs. When the computer program is loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. A computer can be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer program can be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program can Coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (such as infrared, wireless, microwave, etc.) transmission to another website site, computer, server or data center. 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, a data center, etc. integrated with one or more available media. Available media can be magnetic media (e.g., floppy disk, hard disk, magnetic tape), optical media (e.g., high-density digital video disc (digital video disc, DVD)), or semiconductor media (e.g., solid state disk (SSD) )wait.

Those of ordinary skill in the art can understand that the first, second, and other numbers involved in the present application are only for convenience of description, and are not used to limit the scope of the embodiments of the present application, nor do they indicate the sequence.

At least one in this application can also be described as one or more, and multiple can be two, three, four or more, and this application does not make a limitation. In this embodiment of the application, for a technical feature, the technical feature is distinguished by "first", "second", "third", "A", "B", "C" and "D", etc. The technical features described in the "first", "second", "third", "A", "B", "C" and "D" have no sequence or order of magnitude among the technical features described.

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

Predefined in this application can be understood as defining, predefining, storing, prestoring, prenegotiating, preconfiguring, curing, or prefiring.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

It should be understood that steps may be reordered, added or deleted using the various forms of flow shown above. For example, the steps described in the embodiments of the present application may be executed in parallel, sequentially, or in a different order, as long as the desired result of the technical solution disclosed in the present invention can be achieved, no limitation is imposed herein.

The above specific implementation methods do not constitute a limitation to the protection scope of the present invention. It should be apparent to those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made depending on design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

A sidelink monitoring method, characterized in that the method is executed by a first terminal device, and the method includes:

In response to sending a first signal, the first terminal device enters an active state;

In the active state, the first terminal listens to sidelink transmissions.
The method according to claim 1, wherein the first signal comprises: a coordination information request between terminal devices or a first discovery signal.
The method according to claim 2, wherein the step of entering the activation state of the first terminal device in response to sending the first signal comprises:

in response to sending said first signal, starting a first timer;

In response to the running period of the first timer, the first terminal device remains activated.
The method according to claim 3, wherein the starting a first timer in response to sending the first signal comprises:

in response to sending said first signal, starting a second timer;

In response to the second timer expiring, a first timer is started.
The method according to claim 2, wherein the first signal is a coordination information request between terminal devices, and the method further comprises:

In response to receiving the inter-terminal device coordination information sent by the second terminal device, the terminal device exits the activation state.
The method according to claim 2, wherein the first signal is a first discovery signal, and the method further comprises:

In response to receiving the second discovery signal sent by the second terminal device, the terminal device exits the activation state.
The method according to claim 3 or 4, wherein the first signal is a coordination information request between terminal devices, and the method further comprises:

In response to receiving the inter-terminal device coordination information sent by the second terminal device, the first timer is stopped, and the first terminal device exits the activation state.
The method according to claim 3 or 4, wherein the first signal is a first discovery signal, and the method further comprises:

In response to receiving the second discovery signal sent by the second terminal device, the first timer is stopped, and the first terminal device exits the activation state.
The method according to any one of claims 3-4,7-8, characterized in that the method further comprises:

receiving a sidelink radio resource control message sent by the second terminal device;

Determine the length of the first timer and/or the length of the second timer according to the sidelink radio resource control message.
The method according to any one of claims 3-4,7, characterized in that the method further comprises:

Determine the length of the first timer and/or the length of the second timer according to the configuration information of the resource pool that sends the first signal.
The method according to any one of claims 3-4,8, wherein the first signal is a first discovery signal, and the method further comprises:

Determine the length of the first timer and/or the length of the second timer according to the feature information corresponding to the first discovery signal.
The method according to claim 2, further comprising:

In response to the duration of the first terminal device entering the activation state reaching a preset delay limit, the first terminal device exits the activation state.
The method according to claim 12, wherein the preset delay limit comprises: a delay limit of coordination information between terminal devices, or a delay limit of a sidelink discovery process.
The method according to any one of claims 1-13, wherein the terminal device monitors the transmission of the sidelink, comprising:

The terminal device monitors a physical sidelink control channel PSCCH, and/or the terminal device monitors sidelink control information SCI in a physical sidelink shared channel PSSCH.
A sidelink monitoring device, characterized in that the device is applied to a first terminal device, and the device includes:

a processing unit, configured to, in response to sending a first signal, enter the first terminal device into an activation state;

A transceiver unit, configured to, in the activated state, monitor the transmission of the sidelink by the first terminal device.
A communication device, characterized in that the device includes a processor and a memory, and a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the device performs the The method described in any one of 1 to 14.
A communication device, characterized by comprising: a processor and an interface circuit;

The interface circuit is used to receive code instructions and transmit them to the processor;

The processor is configured to run the code instructions to execute the method according to any one of claims 1-14.
A computer-readable storage medium for storing instructions, which, when executed, cause the method according to any one of claims 1 to 14 to be implemented.