WO2023071752A1

WO2023071752A1 - Sidelink transmission method and apparatus, network device, and terminal device

Info

Publication number: WO2023071752A1
Application number: PCT/CN2022/124265
Authority: WO
Inventors: 刘星
Original assignee: 展讯通信（上海）有限公司
Priority date: 2021-10-29
Filing date: 2022-10-10
Publication date: 2023-05-04
Also published as: CN116073966A

Abstract

A sidelink transmission method and apparatus, a network device, and a terminal device, which relate to the technical field of communications. The method comprises: a network device sending first sidelink configuration information to a terminal device, wherein the first sidelink configuration information is used for configuring a transmission parameter of an unlicensed frequency band of a sidelink; and correspondingly, the terminal device receiving the first sidelink configuration information, and performing communication on the unlicensed frequency band according to the first sidelink configuration information. By using the solution of the present application, the reliability of link management of a sidelink can be improved.

Description

Sidelink transmission method and device, network equipment, and terminal equipment

This application claims the priority of the Chinese patent application submitted to the China Patent Office on October 29, 2021, with the application number 202111277412.6, and the title of the invention is "sidelink transmission method and device, network equipment, and terminal equipment", the entire content of which is passed References are incorporated in this application.

technical field

The present application relates to the technical field of communication, and specifically relates to a sidelink transmission method and device, and also relates to a network device and a terminal device.

Background technique

In the cellular network, the terminal equipment communicates with the base station equipment. At this time, the link between the terminal equipment and the base station equipment is called uplink (Uplink, UL) or downlink (Downlink, DL), and the interface is called Uu interface. Different terminal devices can also communicate directly, the link between the terminal devices is called a sidelink (sidelink, SL), and the interface is called a PC5 interface. A schematic diagram of the uplink and downlink and the sidelink is shown in FIG. 1 .

On SL, when a terminal device works on an unlicensed frequency band, it needs to obtain resources for transmission through the preemption mechanism. Therefore, there may be cases where the terminal device cannot transmit due to failure to preempt resources. At this time, it may be mistaken for a wireless link. Radio link failure (RLF), which makes the reliability of the SL link management function low.

Contents of the invention

Embodiments of the present application provide a sidelink transmission method and device, network equipment, and terminal equipment, so as to solve the problem of low reliability of the SL link management function in the prior art.

In order to solve the above technical problems, the embodiments of the present application provide the following technical solutions:

In one aspect, an embodiment of the present application provides a sidelink transmission method, the method including: receiving first sidelink configuration information, where the first sidelink configuration information is used to configure sidelink non- Transmission parameters of the licensed frequency band; performing communication on the unlicensed frequency band according to the first sidelink configuration information.

Optionally, the method further includes: receiving second sidelink configuration information, where the second sidelink configuration information is used to configure transmission parameters of the authorized frequency band of the sidelink; The uplink configuration information is communicated on the licensed frequency band.

Optionally, the first sidelink configuration information includes information for determining the value of the transmission parameter of the unlicensed frequency band, and the second sidelink configuration information includes information of the transmission parameter of the licensed frequency band value, the value of the transmission parameter of the unlicensed frequency band is different from the value of the transmission parameter of the licensed frequency band.

Optionally, the information used to determine the value of the transmission parameter of the unlicensed frequency band is the value of the transmission parameter of the unlicensed frequency band; or, the information used to determine the value of the transmission parameter of the unlicensed frequency band The information is the ratio between the value of the transmission parameter of the unlicensed frequency band and the value of the transmission parameter of the licensed frequency band.

Optionally, the transmission parameters include at least one parameter, and for the same parameter in the at least one parameter, the value configured in the first sidelink configuration information is greater than the value configured in the second sidelink configuration information value.

Optionally, the communicating on the licensed frequency band according to the second sidelink configuration information includes: when the frequency band where the current sending carrier and/or the current receiving carrier is located is a licensed frequency band, according to the second Two sidelink configuration information is communicated on the licensed frequency band.

Optionally, the communicating on the unlicensed frequency band according to the first sidelink configuration information includes: when the frequency band where the current sending carrier and/or the current receiving carrier is located is an unlicensed frequency band, according to the The first sidelink configuration information is communicated in an unlicensed frequency band.

Optionally, the transmission parameters include any one or more of the following: the duration of the timer, the maximum number of HARQ DTX non-continuous transmission of hybrid automatic repeat request, and the timer is used for sidelink management.

On the other hand, an embodiment of the present application further provides a sidelink transmission method, the method including: sending first sidelink configuration information to a terminal device, where the first sidelink configuration information is used to configure Transmission parameters in the unlicensed band for the sidelink.

Optionally, the method further includes: sending second sidelink configuration information to the terminal device, where the second sidelink configuration information is used to configure transmission parameters of a licensed frequency band of the sidelink.

On the other hand, the embodiment of the present application also provides a sidelink transmission device, the device includes: a first processing module and a first communication module;

The first processing module is configured to receive first sidelink configuration information through the first communication module, and the first sidelink configuration information is used to configure the transmission parameters of the unlicensed frequency band of the sidelink ;

The first processing module is further configured to perform communication on an unlicensed frequency band through the first communication module according to the first sidelink configuration information.

Optionally, the first processing module is further configured to receive second sidelink configuration information through the first communication module, and the second sidelink configuration information is used to configure sidelink authorization The transmission parameter of the frequency band; the first processing module is further configured to communicate on the licensed frequency band through the first communication module according to the second sidelink configuration information.

Optionally, the first processing module is specifically configured to: when the frequency band where the current transmitting carrier and/or the current receiving carrier are located is a licensed frequency band, according to the second sidelink configuration information, through the communication module Communicate on licensed frequency bands.

Optionally, the first processing module is specifically configured to: when the frequency band where the current transmitting carrier and/or the current receiving carrier are located is an unlicensed frequency band, pass the communication according to the first sidelink configuration information The module communicates on an unlicensed frequency band.

On the other hand, the embodiment of the present application also provides a sidelink transmission device, the device includes: a second processing module and a second communication module;

The second processing module is configured to send the first sidelink configuration information to the terminal device through the second communication module, and the first sidelink configuration information is used to configure the unlicensed frequency band of the sidelink The transmission parameters.

Optionally, the second processing module is further configured to send second sidelink configuration information to the terminal device through the second communication module, and the second sidelink configuration information is used to configure the sidelink The transmission parameters of the licensed frequency band of the uplink.

On the other hand, an embodiment of the present application further provides a terminal device, including the sidelink transmission apparatus described in any one of the preceding items.

On the other hand, the embodiment of the present application further provides a network device, which is characterized by including the sidelink transmission device described in any one of the preceding items.

On the other hand, the embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, and a computer program is stored thereon, and the computer program When executed by the processor, the methods described in the preceding items are executed.

On the other hand, the embodiment of the present application also provides a sidelink transmission device, including a memory and a processor, the memory stores a computer program that can run on the processor, and the processor runs the A computer program executes the methods described in the preceding items.

On the other hand, the embodiment of the present application also provides a sidelink transmission device, including a memory and a processor, the memory stores a computer program that can run on the processor, and the processor runs the A computer program causes the above method to be carried out.

The sidelink transmission method and device provided by the embodiments of the present application aim at the feature that the terminal equipment needs to obtain resources through the preemption mechanism when it works on the unlicensed frequency band. The parameters are configured separately to match the transmission parameters with the transmission characteristics of the unlicensed frequency band, so as to avoid misjudgment that the failure of the terminal device to transmit in the unlicensed frequency band due to the failure to seize resources is a wireless link failure, and improve the SL link management reliability. Correspondingly, when performing sidelink communication, the terminal device may perform communication on the unlicensed frequency band according to the configured transmission parameters of the unlicensed frequency band of the sidelink.

Furthermore, by configuring different transmission parameters for licensed frequency bands and unlicensed frequency bands, the corresponding transmission parameters can be adapted to the transmission characteristics of different carriers. Parameter communication, providing a reliable management function for the transmission of SL links in different frequency bands.

Description of drawings

FIG. 1 is a schematic diagram of uplink, downlink and sidelink in the prior art;

FIG. 2 is a flowchart of a sidelink link transmission method according to an embodiment of the present application;

FIG. 3 is a schematic diagram of transmission parameter configuration and application in an embodiment of the present application;

FIG. 4 is another schematic diagram of transmission parameter configuration and application in the embodiment of the present application;

FIG. 5 is another schematic diagram of transmission parameter configuration and application in the embodiment of the present application;

FIG. 6 is a schematic structural diagram of a sidelink transmission device according to an embodiment of the present application;

FIG. 7 is another schematic structural diagram of a sidelink transmission device according to an embodiment of the present application;

FIG. 8 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present application.

Detailed ways

In order to make the above purpose, features and beneficial effects of the present application more obvious and understandable, specific embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

Firstly, the system applicable to this application and the corresponding terms are described.

The technical solution of this application can be applied to the fifth generation (5th Generation, 5G) communication system, and can also be applied to the fourth generation (4th Generation, 4G), third generation (3rd Generation, 3G) communication system, and can also be applied to the future Various new communication systems, such as sixth generation (6th Generation, 6G), seventh generation (7th Generation, 7G), etc., are not limited in this embodiment of the present application.

The technical solution of this application is also applicable to other network architectures, including but not limited to relay network architecture, dual-link architecture, vehicle-to-everything (V2X) architecture, device-to-device communication (Device-to- -Device, D2D) and other architectures.

The devices involved in this embodiment of the present application include core network devices, access network devices, and terminal devices.

The access network device in the embodiment of the present application is a device deployed in a radio access network (RAN) to provide wireless communication functions, for example, a base station (base station, BS), a base station controller, a relay node (relay node, RN) and so on. For example, the base station can be a base transceiver station (Base Transceiver Station, BTS) in a 2G network, a node B (NodeB) in a 3G network, and an evolved NodeB (evolved NodeB, eNB) in a 4G network. In a wireless local area network (Wireless Local Area Networks, WLAN), it can be an access point (Access Point, AP), and in a 5G new wireless (New Radio, NR), it can be a next generation base station node (Next generation NodeB, gNB), And the Node B (ng-eNB) that continues to evolve, in which NR technology is used for communication between gNB and terminal equipment, and evolved Universal Terrestrial Radio Access (Evolved Universal Terrestrial Radio Access, E- UTRA) technology for communication, both gNB and ng-eNB can be connected to the 5G core network. The base station in the embodiment of the present application also includes devices that provide base station functions in future new communication systems, and the like. A base station controller, also called a base station controller device, is a device for managing base stations, such as a base station controller (Base Station Controller, BSC) in a 2G network, a radio network controller (Radio Network Controller, RNC) can also refer to a device that controls and manages base stations in a new communication system in the future.

The terminal equipment in the embodiment of the present application may also be referred to as terminal, user equipment (User Equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station (Mobile Station, MS), remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user device. Terminal equipment can be cellular phones, cordless phones, Session Initiation Protocol (Session Initiation Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital processing (Personal Digital Assistant, PDA), with wireless communication capabilities Handheld devices, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in the future 5G network or terminals in the future evolution of the public land mobile network (Public Land Mobile Network, PLMN) equipment, etc., which are not limited in this embodiment of the present application.

When the terminal device performs data transmission on the SL, it needs to obtain SL configuration information first, such as timer configuration (for example, timer duration configuration), continuous hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) discontinuous transmission (Discontinuous Transmission, DTX) upper limit (can be configured through the field "sl-MaxNumConsecutiveDTX") configuration and other information, the terminal device performs SL transmission according to the SL configuration information.

For example, the SL configuration information may include the configuration information of the timer T400. After the first terminal device sends the SL RRC reconfiguration message (RRCReconfigurationSidelink) to the second terminal device, the timer T400 is started. When the timer T400 expires, if no In the case of the SL RRC reconfiguration failure message (RRCReconfigurationFailureSidelink) or the SL RRC reconfiguration completion message (RRCReconfigurationCompleteSidelink) returned by the second terminal device, it is considered that an SL link failure has occurred.

For another example, the SL configuration information may include the configuration information of the timer T5000. When the SL connection is established, the first terminal device starts the timer after sending a direct link establishment request message (DIRECT LINK ESTABLISHMENT REQUEST) to the second terminal device. T5000, if the DIRECT LINK ESTABLISHMENT ACCEPT or DIRECT LINK ESTABLISHMENT REJECT message is not received before the timer T5000 expires, resend the DIRECT LINK ESTABLISHMENT REJECT message, Or terminate the process of establishing the direct link. After T5000 times out, if the above message is not received, it is considered that an SL link failure has occurred. For another example, the SL configuration information may include the upper limit of the number of HARQ DTXs (assumed to be X). After the first terminal device sends any data packet to the second terminal device, it does not receive HARQ feedback from the second terminal device for X consecutive times. Then it is considered that an SL link failure has occurred.

When there are licensed and unlicensed frequency bands on the SL, the terminal device needs to obtain resources through the preemption mechanism on the unlicensed frequency band. If the same set of SL configuration parameters is configured for the licensed and unlicensed frequency bands, for example, the same T400 duration is used, when the terminal device is working on the unlicensed frequency band, the above-mentioned second terminal device may fail to respond due to resource preemption failure. In some cases, when T400 times out, the above-mentioned first terminal device will mistakenly believe that the SL link failure occurs.

In view of the above problems, the embodiment of the present application provides a sidelink transmission method, which configures the licensed frequency band and the unlicensed frequency band of the SL respectively. Correspondingly, the terminal device can select the corresponding transmission parameters according to the frequency band where the current carrier is located. SL transmission. Referring to Figure 2, the method includes:

201. The network device sends first sidelink configuration information to the terminal device, where the first sidelink configuration information is used to configure transmission parameters of an unlicensed frequency band of the sidelink. Correspondingly, the terminal device receives the first sidelink configuration information.

Wherein, the network device can be a core network device or an access network device. If it is the former, the core network device can send the first sidelink configuration information to the access network device, and the access network device sends the first sidelink configuration information to the access network device. The configuration information is transparently transmitted to the terminal device. Exemplarily, the core network device may be AMF (Access and mobility management function, access and mobility management function), ProSe Function (Proximity service function, proximity service function), etc.

Optionally, the transmission parameters in this application may include one or more parameters, such as but not limited to any one or more of the following parameters: the duration of the timer, the maximum number of HARQ DTX, etc. Wherein, the timer is used for sidelink management.

Exemplarily, the timer may include T400 and/or T5000, and may also include other timers used for sidelink management.

It should be noted that, the transmission parameter may introduce a new field into the existing configuration information to represent the configuration information of the unauthorized link.

It should be noted that, in practical applications, a new field may be introduced into the existing configuration information to represent the configuration information of the unauthorized link.

Optionally, before step 201, the method may further include: the network device generates first sidelink configuration information.

202. The terminal device performs communication on an unlicensed frequency band according to the first sidelink configuration information.

Optionally, during specific implementation, step 202 may include: in the case that the frequency band where the current transmitting carrier and/or the current receiving carrier is located is an unlicensed frequency band, according to the first sidelink configuration information on the unlicensed frequency band to communicate.

In order to improve the reliability of the SL link management function, in the embodiment of this application, the network device separately configures the transmission parameters of the unlicensed frequency band for the terminal device. According to the above description, if the network device uses the licensed frequency band on the unlicensed frequency band Transmission parameters will lead to RLF misjudgment. Therefore, by configuring transmission parameters for the unlicensed frequency band separately, you can flexibly configure transmission parameters suitable for the unlicensed frequency band according to the characteristics of the unlicensed frequency band, thereby improving the reliability of the SL link management function. .

Optionally, referring to FIG. 2, the method may further include: 203, the network device sends second sidelink configuration information to the terminal device, and the second sidelink configuration information is used to configure the authorized frequency band of the sidelink The transmission parameters. corresponding. The terminal device receives second sidelink configuration information.

Wherein, the first sidelink configuration information and the second sidelink configuration information may be placed in the same message or in different messages, which is not limited in this application. The message may be a proprietary signaling or a system message, which is not limited in this embodiment of the present application.

Optionally, before step 203, the method further includes: the network device generates second sidelink configuration information.

204. The terminal device performs communication on the authorized frequency band according to the second sidelink configuration information.

Optionally, step 204 may include during specific implementation:

In a case where the frequency band where the current sending carrier and/or the current receiving carrier is located is an authorized frequency band, communication is performed on the authorized frequency band according to the second sidelink configuration information.

When performing sidelink transmission, the terminal device can select corresponding transmission parameters for communication according to the configuration information for the unlicensed frequency band and licensed frequency band configured by the network device and the frequency band where the current carrier is located.

Wherein, the execution sequence between any one of step 201 and step 202 and any one of step 203 and step 204 is in no particular order.

Optionally, the information for determining the value of the transmission parameter of the unlicensed frequency band may have the following two situations:

Case 1: The value used to determine the transmission parameter of the unlicensed frequency band is the value of the transmission parameter of the unlicensed frequency band.

In case 1, the terminal device may directly determine the transmission parameters of the unlicensed frequency band according to the first sidelink configuration information.

In case 2, the information used to determine the value of the transmission parameter of the unlicensed frequency band is the ratio between the value of the transmission parameter of the unlicensed frequency band and the value of the transmission parameter of the licensed frequency band.

In case 2, the terminal device can calculate the transmission parameter of the unlicensed frequency band according to the ratio and the value of the transmission parameter of the licensed frequency band.

In case 2, it should be noted that, for different parameters in the transmission parameters, the ratio may be the same or different, which is not limited in this application. If the ratio is the same for all parameters in the transmission parameters, only one value may be configured in the first sidelink configuration information, thereby reducing signaling overhead.

Case 3: The information used to determine the value of the transmission parameter of the unlicensed frequency band is the difference between the value of the transmission parameter of the unlicensed frequency band and the value of the transmission parameter of the licensed frequency band.

In case 3, the terminal device may calculate the transmission parameter of the unlicensed frequency band according to the difference and the value of the transmission parameter of the licensed frequency band.

In case 3, it should be noted that for different parameters in the transmission parameters, the difference may be the same or different, which is not limited in this application. If the difference is the same for all parameters in the transmission parameters, only one value may be configured in the first sidelink configuration information, thereby reducing signaling overhead.

Of course, the information used to determine the value of the transmission parameter of the unlicensed frequency band may also be other information, which is not limited in this application.

Optionally, the transmission parameters include at least one parameter, and for the same parameter in the at least one parameter, the value configured in the first sidelink configuration information is greater than the value configured in the second sidelink configuration information For example, the duration T1 of T400 in the unlicensed frequency band is greater than the duration T2 of T400 in the licensed frequency band. In this case, when transmitting in the unlicensed frequency band, it will not be misjudged as SL link failure when T400 arrives at T2 when the peer terminal device fails to seize resources and fails to give feedback in time, but waits until T400 arrives The failure of the SL link will be judged after T1, which can better ensure the transmission on the unlicensed frequency band and improve the reliability of SL link management.

It should be noted that, in practical applications, the transmission parameters corresponding to the licensed frequency band and the unlicensed frequency band may be all or partly delivered by the network device to the terminal device or provided by a protocol, which is not limited in this embodiment of the present application.

In this embodiment of the application, in view of the fact that the terminal device needs to obtain resources through the preemption mechanism when it works on the unlicensed frequency band, the network side separately configures the transmission parameters of the unlicensed frequency band of the side link of the terminal device, that is to say , two sets of transmission parameters are adopted, that is, the transmission parameters of the unlicensed frequency band and the transmission parameters of the licensed frequency band of the sidelink are respectively configured. Further, different transmission parameters are configured for the licensed frequency band and the unlicensed frequency band of the sidelink. Correspondingly, when performing sidelink transmission, the terminal device can use the transmission parameters corresponding to the frequency band to perform sidelink transmission according to the frequency band where the current carrier is located, that is, according to the configured unlicensed The transmission parameters of the frequency band are communicated on the unlicensed frequency band, and the communication is performed on the authorized frequency band according to the configured transmission parameters of the authorized frequency band of the sidelink. Since different transmission parameters are configured for licensed frequency bands and unlicensed frequency bands, the corresponding transmission parameters can be adapted to the transmission characteristics of different carriers, effectively avoiding the misjudgment that the terminal equipment cannot transmit due to failure to seize resources as SL link failure In this way, the reliability of the SL link management function is improved.

Exemplarily, in the case where the above-mentioned transmission parameters are configured by the access network device, there may be various configuration methods, such as:

(1) When the terminal device is in the connected state, the access network device may send the first sidelink configuration information and/or the second sidelink configuration information to the terminal device through dedicated signaling.

(2) When the terminal device is in the idle state or inactive state, the access network device can broadcast the first sidelink configuration information and/or the second sidelink configuration information through the system information block (SIB) Route SL configuration information.

In addition, when the terminal device is located outside the coverage of the access network device and cannot receive a signal from the access network device, the terminal device can also obtain corresponding transmission parameters through the stored pre-configuration information.

In order to make the above-mentioned embodiments of the present application more clear, the implementation process of the above-mentioned embodiments is illustrated below through the embodiments shown in Fig. 3, Fig. 4 and Fig. 5. The implementation shown in Fig. 3, Fig. 4 and Fig. 5 The difference between the examples is that the transmission parameters of the embodiment shown in Figure 3 include the duration of T5000, the transmission parameters of the embodiment shown in Figure 4 include the upper limit of the number of HARQ DTX, and the transmission parameters of the embodiment shown in Figure 5 include The duration of T5000. The processes shown in FIG. 3 , FIG. 4 and FIG. 5 are described by taking the network device as an example, and the implementation processes in FIG. 3 , FIG. 4 and FIG. 5 are described respectively below. As shown in FIG. 3 , it is a schematic diagram of transmission parameter configuration and application in the embodiment of the present application.

In step 31, the base station sends the first sidelink configuration information to the first terminal device, such as broadcasting the sidelink configuration information through the SIB, to configure the transmission parameters of the unlicensed frequency band of the sidelink, and the transmission parameters include unlicensed The duration of the timer T5000 corresponding to the frequency band.

It should be noted that the transmission parameters corresponding to the licensed frequency band may be determined by the second sidelink configuration information sent by the base station, or provided by a protocol.

In step 32, the first terminal device saves the transmission parameters of the unlicensed frequency band configured by the base station.

In step 33, when the first terminal device needs to establish an SL connection with the second terminal device, the first terminal device sends a direct link establishment request message (DIRECT LINK ESTABLISHMENT REQUEST) to the second terminal device.

If the frequency band where the current sending carrier is located is an unlicensed frequency band, in step 34, the first terminal device starts a timer T5000 corresponding to the unlicensed frequency band.

The first terminal device did not receive the direct link establishment reception (DIRECT LINK ESTABLISHMENT ACCEPT) or the direct link establishment rejection (DIRECT LINK ESTABLISHMENT REJECT) message sent by the second terminal device before the timer T5000 expired, so in step 35 , and resend the direct link establishment request message.

In step 36. The timer T5000 expires, and the first terminal device determines that an SL link failure occurs.

Since the value of the T5000 duration of the unlicensed frequency band is greater than the value of the T5000 duration of the licensed frequency band, for example, the duration of the T5000 of the unlicensed frequency band is t1, and the duration of the T5000 of the licensed frequency band is t2, t1>t2, so it can be received The direct link establishment reception or direct link establishment rejection message provides a longer waiting time, which to a certain extent makes up for the time taken by the second terminal device to fail to send the message due to resource preemption failure, and improves the side Reliability of link management.

As shown in FIG. 4 , it is another schematic diagram of transmission parameter configuration and application in the embodiment of the present application.

In step 41, the base station sends the first side link configuration information and the second side link configuration information to the first terminal device, for example, the above configuration information may be sent through dedicated signaling, and the first side link configuration information Including the transmission parameters corresponding to the unlicensed frequency band: the upper limit of the number of continuous HARQ DTX (for example, 3).

In step 42, the first terminal device sends data A to the second terminal device, and repeatedly sends data A because no HARQ feedback from the second terminal device is received.

If the frequency band where the current receiving carrier is located is an unlicensed frequency band, in step 43, after the first terminal device repeatedly sends data A to the second terminal device for 3 times, it is determined that an SL link failure has occurred.

Since the upper limit of the number of HARQ DTXs in the unlicensed frequency band (assumed to be 3) is greater than the upper limit of the number of HARQ DTXs in the licensed frequency band (assumed to be 2), after the first terminal sends a data packet to the second terminal, it does not receive it for 3 consecutive times. Only the HARQ feedback from the second terminal device will consider that the SL link failure has occurred. Compared with the upper limit of the number of HARQ DTX in the licensed frequency band, the number of times the data packet is repeatedly sent is increased, which also compensates for the second terminal to a certain extent. The number of data retransmissions occupied by the device due to the failure to preempt resources due to the failure to perform HARQ feedback improves the reliability of sidelink management.

As shown in FIG. 5 , it is another schematic diagram of transmission parameter configuration and application in the embodiment of the present application.

In step 51, the base station sends the first side link configuration information and the second side link configuration information to the first terminal device, and the first terminal device receives the first side link configuration information and the second side link configuration information issued by the base station. Uplink configuration information, the second sidelink configuration information includes the duration T1 of the timer T400 of the licensed frequency band, and the first sidelink configuration information includes the duration T2 of the timer T400 corresponding to the unlicensed frequency band and the licensed frequency band The difference ΔT of the corresponding timer T400, ΔT is greater than 0.

In step 52, the first terminal device determines that the duration T2 of the timer T400 corresponding to the unlicensed frequency band is T1+ΔT.

In step 53, the first terminal device needs to exchange configuration information with the second terminal device, and the first terminal device sends an SL RRC reconfiguration message to the second terminal device.

If the frequency band where the current transmitting carrier is located is an unlicensed frequency band, in step 54, a timer T400 corresponding to the unlicensed frequency band is started, and the duration of the timer T400 is T1+ΔT.

When the timer T400 reaches T1+△T, the first terminal equipment does not receive the SL RRC reconfiguration failure message or the SL RRC reconfiguration completion message replied by the second terminal equipment, so in step 55, it is determined that an SL link failure has occurred.

Since the value of the T400 duration of the unlicensed frequency band is larger than the value of the T400 duration of the licensed frequency band, it can provide a longer waiting time for receiving the SL RRC reconfiguration failure message or the SL RRC reconfiguration completion message, thus to a certain extent It makes up for the time taken by the second terminal device that the message cannot be sent due to the failure to seize resources, and improves the reliability of sidelink management.

It should be noted that the steps in the above embodiments are only schematically described, and do not limit the specific implementation steps and sequence of the solution of the present application.

The sidelink transmission method provided by the embodiment of the present application aims at the feature that the terminal equipment needs to obtain resources through the preemption mechanism when it works on the unlicensed frequency band, and performs the transmission parameters of the licensed frequency band and the unlicensed frequency band of the sidelink respectively. configuration, so that the configured transmission parameters can be adapted to the licensed frequency band and the unlicensed frequency band respectively. Correspondingly, when performing SL communication, the terminal device can select the transmission parameters corresponding to the frequency band for communication according to the frequency band where the current carrier is located. Since the transmission parameters of the licensed frequency band and the unlicensed frequency band are configured separately, the corresponding transmission The parameters are adapted to the transmission characteristics of different carriers, effectively avoiding the misjudgment that the terminal equipment at the receiving end fails to provide feedback due to the failure to seize resources as the failure of the SL link, thereby improving the reliability of SL link management.

Correspondingly, the embodiment of the present application also provides a sidelink transmission device, as shown in FIG. 6 , in a non-limiting embodiment, the sidelink transmission device 600 includes: a first processing module 601 and The first communication module 602 . Wherein: the first processing module 601 is configured to receive the first sidelink configuration information through the first communication module 602, and the first sidelink configuration information is used to configure the transmission parameters of the unlicensed frequency band of the sidelink; The first processing module 601 is further configured to perform communication on an unlicensed frequency band through the first communication module 602 according to the first sidelink configuration information.

Further, in another non-limiting embodiment, the above-mentioned first processing module 601 is further configured to receive second sidelink configuration information through the first communication module 602, and the second sidelink configuration information uses The first processing module 601 is configured to configure the transmission parameters of the licensed frequency band of the sidelink; the first processing module 601 is also configured to communicate on the licensed frequency band through the first communication module 602 according to the second sidelink configuration information.

It should be noted that, the above-mentioned first processing module 601 may specifically, when the frequency band where the current transmitting carrier and/or the current receiving carrier are located is a licensed frequency band, according to the second sidelink configuration information through the communication module Perform communication on the licensed frequency band; and/or in the case that the frequency band where the current transmitting carrier and/or the current receiving carrier is located is an unlicensed frequency band, according to the first sidelink configuration information through the communication module in the unlicensed communicate on the frequency band.

Correspondingly, this embodiment of the present application also provides a terminal device, including the sidelink transmission apparatus shown in Figure 6 above. A network device may be a core network device or a base station.

Correspondingly, the embodiment of the present application also provides a sidelink transmission device, as shown in FIG. 7 , in a non-limiting embodiment, the sidelink transmission device 700 includes the following modules: the second processing module 701 and a second communication module 702. Wherein: the second processing module 701 is configured to send the first sidelink configuration information to the terminal device through the second communication module 702, and the first sidelink configuration information is used to configure the unlicensed frequency band of the sidelink Transfer parameters.

In another non-limiting embodiment, the second processing module 701 is further configured to send second sidelink configuration information to the terminal device through the second communication module 702, the second sidelink configuration The information is used to configure the transmission parameters of the licensed frequency band of the sidelink. .

Regarding the form, content, and transmission method of the above-mentioned first sidelink configuration information and second sidelink configuration information, reference may be made to the description in the foregoing sidelink transmission method embodiment of the present application, and details are not repeated here.

Correspondingly, an embodiment of the present application further provides a network device, including the sidelink transmission apparatus shown in FIG. 7 above. A network device may be a core network device or a base station.

For more details about the working principles and working modes of the above-mentioned devices, reference may be made to the relevant descriptions in the corresponding method embodiments above, and details will not be repeated here.

The sidelink transmission device provided by the embodiment of the present application is aimed at the feature that the terminal equipment needs to obtain resources through a preemption mechanism when it works on the unlicensed frequency band, and separately configures the transmission parameters of the unlicensed frequency band of the sidelink, so that The configured transmission parameters can be adapted to the transmission characteristics of the unlicensed frequency band, so as to avoid misjudgment that the terminal device cannot transmit due to failure to seize resources in the unlicensed frequency band as a wireless link failure, and improve SL link management reliability. Correspondingly, when performing sidelink communication, the terminal device may perform communication according to the configured transmission parameters of the unlicensed frequency band of the sidelink.

In a specific implementation, the above-mentioned sidelink transmission device may correspond to chips with corresponding functions in network equipment and/or terminal equipment, such as SOC (System-On-a-Chip, system on chip), baseband chip, chip module, etc. .

In a specific implementation, regarding each device described in the above embodiments, each module/unit contained in the product may be a software module/unit, or a hardware module/unit, or may be partly a software module/unit, partly is a hardware module/unit.

For example, for each device or product applied to or integrated into a chip, each module/unit contained therein may be realized by hardware such as a circuit, or at least some modules/units may be realized by a software program, and the software program Running on the integrated processor inside the chip, the remaining (if any) modules/units can be realized by means of hardware such as circuits; They are all realized by means of hardware such as circuits, and different modules/units can be located in the same component (such as chips, circuit modules, etc.) or different components of the chip module, or at least some modules/units can be realized by means of software programs, The software program runs on the processor integrated in the chip module, and the remaining (if any) modules/units can be realized by hardware such as circuits; /Units can be realized by means of hardware such as circuits, and different modules/units can be located in the same component (such as chips, circuit modules, etc.) or different components in the terminal, or at least some modules/units can be implemented in the form of software programs Realization, the software program runs on the processor integrated in the terminal, and the remaining (if any) modules/units can be implemented by means of hardware such as circuits.

The embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, and a computer program is stored thereon, and the computer program is executed by a processor The steps in the above method embodiments are executed during runtime.

The sidelink transmission method provided in the embodiment of the present application may be implemented by the following devices: a chip, or a chip module, or a communication device.

The embodiment of the present application also provides a sidelink transmission device, including a memory and a processor, the memory stores a computer program that can run on the processor, and when the processor runs the computer program Execute the steps in the above method embodiments.

Please refer to FIG. 8 , which is a schematic diagram of a hardware structure of an electronic device provided by an embodiment of the present application. The electronic device includes a processor 801 , a memory 802 and a transceiver 803 .

The processor 801 may be a general-purpose central processing unit (central processing unit, CPU), a microprocessor, a specific application integrated circuit (application-specific integrated circuit, ASIC), or one or more devices used to control the execution of the program program of this application. integrated circuit. The processor 801 may also include multiple CPUs, and the processor 801 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, or processing cores for processing data such as computer program instructions.

Memory 802 can be ROM or other types of static storage devices that can store static information and instructions, RAM or other types of dynamic storage devices that can store information and instructions, and can also be electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk The embodiment of the present application does not impose any limitation on storage media or other magnetic storage devices, or any other media that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer. The memory 802 may exist independently (in this case, the memory 802 may be located outside the device or within the device), or may be integrated with the processor 801 . Wherein, the memory 802 may contain computer program codes. The processor 801 is configured to execute computer program codes stored in the memory 802, so as to implement the method provided by the embodiment of the present application.

The processor 801, the memory 802 and the transceiver 803 are connected through a bus. Transceiver 803 is used to communicate with other devices or a communication network. Optionally, the transceiver 803 may include a transmitter and a receiver. The device used to implement the receiving function in the transceiver 803 can be regarded as a receiver, and the receiver is used to perform the receiving step in the embodiment of the present application. The device in the transceiver 803 for implementing the sending function may be regarded as a transmitter, and the transmitter is used to perform the sending step in the embodiment of the present application.

When the schematic structural diagram shown in FIG. 8 is used to illustrate the structure of the terminal device involved in the above embodiments, the processor 801 is used to control and manage the actions of the terminal device. For example, the processor 801 is used to support the terminal device to execute the diagram 2 or some or all of the steps performed by the terminal device in FIG. 3 or FIG. 4 or FIG. 5 , and/or the actions performed by the terminal device in other processes described in the embodiments of this application. The processor 801 may communicate with other network entities through the transceiver 803, for example, communicate with the aforementioned network devices. The memory 802 is used to store program codes and data of the terminal device. When the processor runs the computer program, it can control the transceiver 803 to receive downlink signaling or downlink data.

When the structural diagram shown in FIG. 8 is used to illustrate the structure of the network device involved in the above-mentioned embodiments, the processor 801 is used to control and manage the actions of the network device, for example, the processor 801 is used to support the network device to execute the diagram 2 or steps performed by some or all of the network devices in FIG. 3 or FIG. 4 or FIG. 5 , and/or actions performed by network devices in other processes described in the embodiments of this application. The processor 801 may communicate with other network entities through the transceiver 803, for example, communicate with the above-mentioned terminal equipment. The memory 802 is used to store program codes and data of network devices. When the processor runs the computer program, it can control the transceiver 803 to send downlink data or downlink signaling.

It should be understood that the term "and/or" in this article is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and/or B may mean: A exists alone, and A and B exist at the same time , there are three cases of B alone. In addition, the character "/" in this article indicates that the associated objects are an "or" relationship.

"Multiple" appearing in the embodiments of the present application means two or more.

The first, second, etc. descriptions that appear in the embodiments of this application are only for illustration and to distinguish the description objects. Any limitations of the examples.

The various embodiments provided in the present application may be implemented in whole or in part by software, hardware, firmware or other arbitrary combinations. When implemented using software, the above-described embodiments may be implemented in whole or in part in the form of computer program products. The computer program product comprises one or more computer instructions or computer programs. When the computer instruction or computer program is loaded or executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Wired or wireless transmission to another website site, computer, server or data center. It should be understood that, in various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes any limitation.

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

A unit described as a separate component may or may not be physically separated, and a component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may be physically arranged separately, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware, or in the form of hardware plus software functional units.

Although the present application is disclosed as above, the present application is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application should be based on the scope defined in the claims.

Claims

A sidelink transmission method, characterized in that the method comprises:

receiving first sidelink configuration information, where the first sidelink configuration information is used to configure transmission parameters of the unlicensed frequency band of the sidelink;

performing communication on an unlicensed frequency band according to the first sidelink configuration information.
The method according to claim 1, further comprising:

receiving second sidelink configuration information, where the second sidelink configuration information is used to configure transmission parameters of the authorized frequency band of the sidelink;

performing communication on the authorized frequency band according to the second sidelink configuration information.
The method according to claim 2, wherein the first sidelink configuration information includes information for determining the value of the transmission parameter of the unlicensed frequency band, and the second sidelink configuration information Including the value of the transmission parameter of the licensed frequency band, the value of the transmission parameter of the unlicensed frequency band is different from the value of the transmission parameter of the licensed frequency band.
The method according to claim 3, wherein the information used to determine the value of the transmission parameter of the unlicensed frequency band is the value of the transmission parameter of the unlicensed frequency band; or, the information used to determine the value of the transmission parameter of the unlicensed frequency band; The information about the value of the transmission parameter of the unlicensed frequency band is the ratio between the value of the transmission parameter of the unlicensed frequency band and the value of the transmission parameter of the licensed frequency band.
According to the method according to any one of claims 2-4, the transmission parameters include at least one parameter, and for the same parameter in the at least one parameter, the value configured in the first sidelink configuration information is greater than the A value configured in the second sidelink configuration information.
The method according to any one of claims 2-5, wherein the communicating on the authorized frequency band according to the second sidelink configuration information comprises:

In a case where the frequency band where the current sending carrier and/or the current receiving carrier is located is an authorized frequency band, communication is performed on the authorized frequency band according to the second sidelink configuration information.
The method according to any one of claims 1-6, wherein the communicating on an unlicensed frequency band according to the first sidelink configuration information comprises:

In a case where the frequency band where the current sending carrier and/or the current receiving carrier is located is an unlicensed frequency band, perform communication on the unlicensed frequency band according to the first sidelink configuration information.
The method according to any one of claims 1-7, wherein the transmission parameters include any one or more of the following: the duration of the timer, the maximum number of HARQ DTX discontinuous transmission of the hybrid automatic repeat request, the The above timers are used for sidelink management.
A sidelink transmission method, characterized in that the method comprises:

Sending first sidelink configuration information to the terminal device, where the first sidelink configuration information is used to configure transmission parameters of the unlicensed frequency band of the sidelink.
The method according to claim 9, characterized in that the method further comprises:

Sending second sidelink configuration information to the terminal device, where the second sidelink configuration information is used to configure transmission parameters of the authorized frequency band of the sidelink.
The method according to claim 10, wherein the first sidelink configuration information includes information for determining the value of the transmission parameter of the unlicensed frequency band, and the second sidelink configuration information Including the value of the transmission parameter of the licensed frequency band, the value of the transmission parameter of the unlicensed frequency band is different from the value of the transmission parameter of the licensed frequency band.
The method according to claim 11, wherein the information used to determine the value of the transmission parameter of the unlicensed frequency band is the value of the transmission parameter of the unlicensed frequency band; or, the information used to determine the value of the transmission parameter of the unlicensed frequency band; The information about the value of the transmission parameter of the unlicensed frequency band is the ratio between the value of the transmission parameter of the unlicensed frequency band and the value of the transmission parameter of the licensed frequency band.
According to the method according to any one of claims 10-12, the transmission parameters include at least one parameter, and for the same parameter in the at least one parameter, the value configured in the first sidelink configuration information is greater than the A value configured in the second sidelink configuration information.
The method according to any one of claims 9-13, wherein the transmission parameters include any one or more of the following: the duration of the timer, the maximum number of HARQ DTX discontinuous transmission of the hybrid automatic repeat request, the The above timers are used for sidelink management.
A sidelink transmission device, characterized in that the device includes: a first processing module and a first communication module;

The first processing module is configured to receive first sidelink configuration information through the first communication module, and the first sidelink configuration information is used to configure the transmission parameters of the unlicensed frequency band of the sidelink ;

The first processing module is further configured to perform communication on an unlicensed frequency band through the first communication module according to the first sidelink configuration information.
The device according to claim 15, characterized in that,

The first processing module is further configured to receive second sidelink configuration information through the first communication module, and the second sidelink configuration information is used to configure the transmission parameters of the authorized frequency band of the sidelink ;

The first processing module is further configured to communicate on the licensed frequency band through the first communication module according to the second sidelink configuration information.
The device according to claim 16, wherein the first sidelink configuration information includes information for determining the value of the transmission parameter of the unlicensed frequency band, and the second sidelink configuration information Including the value of the transmission parameter of the licensed frequency band, the value of the transmission parameter of the unlicensed frequency band is different from the value of the transmission parameter of the licensed frequency band.
The device according to claim 17, wherein the information used to determine the value of the transmission parameter of the unlicensed frequency band is the value of the transmission parameter of the unlicensed frequency band; or, the information used to determine the value of the transmission parameter of the unlicensed frequency band; The information about the value of the transmission parameter of the unlicensed frequency band is the ratio between the value of the transmission parameter of the unlicensed frequency band and the value of the transmission parameter of the licensed frequency band.
According to the device according to any one of claims 16-18, the transmission parameters include at least one parameter, and for the same parameter in the at least one parameter, the value configured in the first sidelink configuration information is greater than the A value configured in the second sidelink configuration information.
The device according to any one of claims 16-19, wherein the first processing module is specifically configured to:

In the case that the frequency band where the current sending carrier and/or the current receiving carrier is located is a licensed frequency band, performing communication on the licensed frequency band through the communication module according to the second sidelink configuration information.
The device according to any one of claims 15-20, wherein the first processing module is specifically configured to:

In the case that the frequency band where the current sending carrier and/or the current receiving carrier is located is an unlicensed frequency band, perform communication on the unlicensed frequency band through the communication module according to the first sidelink configuration information.
The device according to any one of claims 15-21, wherein the transmission parameters include any one or more of the following: the duration of the timer, the maximum number of HARQ DTX discontinuous transmission of hybrid automatic repeat request, the The above timers are used for sidelink management.
A sidelink transmission device, characterized in that the device includes: a second processing module and a second communication module;

The second processing module is configured to send the first sidelink configuration information to the terminal device through the second communication module, and the first sidelink configuration information is used to configure the unlicensed frequency band of the sidelink The transmission parameters.
The device according to claim 23, characterized in that,

The second processing module is further configured to send second sidelink configuration information to the terminal device through the second communication module, where the second sidelink configuration information is used to configure the sidelink Transmission parameters for licensed frequency bands.
The device according to claim 24, wherein the first sidelink configuration information includes information for determining the value of the transmission parameter of the unlicensed frequency band, and the second sidelink configuration information Including the value of the transmission parameter of the licensed frequency band, the value of the transmission parameter of the unlicensed frequency band is different from the value of the transmission parameter of the licensed frequency band.
The device according to claim 25, wherein the information used to determine the value of the transmission parameter of the unlicensed frequency band is the value of the transmission parameter of the unlicensed frequency band; or, the information used to determine the value of the transmission parameter of the unlicensed frequency band; The information about the value of the transmission parameter of the unlicensed frequency band is the ratio between the value of the transmission parameter of the unlicensed frequency band and the value of the transmission parameter of the licensed frequency band.
According to the device according to any one of claims 24-26, the transmission parameters include at least one parameter, and for the same parameter in the at least one parameter, the value configured in the first sidelink configuration information is greater than the A value configured in the second sidelink configuration information.
The device according to any one of claims 23-27, wherein the transmission parameters include any one or more of the following: the duration of the timer, the maximum number of HARQ DTX discontinuous transmission of hybrid automatic repeat request, the The above timers are used for sidelink management.
A terminal device, characterized by comprising the sidelink transmission device according to any one of claims 15-22.
A network device, characterized by comprising the sidelink transmission device according to any one of claims 23-28.
A computer-readable storage medium, the computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, on which a computer program is stored, characterized in that, when the computer program is run by a processor, the The method of any one of claims 1 to 8 being performed, or causing the method of any one of claims 9 to 14 to be performed.
A sidelink transmission device, comprising a memory and a processor, the memory stores a computer program that can run on the processor, wherein the processor executes the claims when running the computer program The method described in any one of 1 to 8, or the method described in any one of claims 9 to 14.