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

Abstract

The present application provides a sidelink transmission method and device, a network device, and a terminal device, and relates to the field of communication technology. The method includes: the network device sends first sidelink configuration information to the terminal device, and the first sidelink configuration information is used to configure the transmission parameters of the unlicensed frequency band of the sidelink. Accordingly, the terminal device receives the first sidelink configuration information and communicates on the unlicensed frequency band according to the first sidelink configuration information. By using the solution of the present application, the reliability of the sidelink link management can be improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a sidelink transmission method and apparatus, and also to a network device and a terminal device. Background Art

[0002] In a cellular network, a terminal device communicates with a base station device. The link between the terminal device and the base station device is called an uplink (UL) or a downlink (DL), and the interface is called a Uu interface. Different terminal devices can also communicate directly with each other. The link between terminal devices is called a sidelink (SL), and the interface is called a PC5 interface. The schematic diagram of the uplink and downlink and the sidelink is shown in the figure. Figure 1 shown.

[0003] On SL, when a terminal device operates in an unlicensed frequency band, it needs to obtain resources for transmission through a preemption mechanism. Therefore, there may be a situation where the terminal device cannot transmit due to a failure to preempt resources. At this time, it may be mistakenly believed that a radio link failure (RLF) has occurred, resulting in low reliability of the SL link management function. Summary of the invention

[0004] The embodiments of the present application provide a side link transmission method and apparatus, a network device, and a terminal device to solve the problem of low reliability of the SL link management function in the prior art.

[0005] In order to solve the above technical problems, the embodiments of the present application provide the following technical solutions:

[0006] On the one hand, an embodiment of the present application provides a sidelink transmission method, the method comprising: receiving first sidelink configuration information, wherein the first sidelink configuration information is used to configure transmission parameters of an unlicensed frequency band of the sidelink; and communicating on the unlicensed frequency band according to the first sidelink configuration information.

[0007] Optionally, the method also includes: receiving second sidelink configuration information, where the second sidelink configuration information is used to configure transmission parameters of an authorized frequency band of the sidelink; and communicating on the authorized frequency band according to the second sidelink configuration information.

[0008] 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 the value of the transmission parameter of the authorized frequency band, and the value of the transmission parameter of the unlicensed frequency band is different from the value of the transmission parameter of the authorized frequency band.

[0009] 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 is the ratio between the value of the transmission parameter of the unlicensed frequency band and the value of the transmission parameter of the authorized frequency band.

[0010] Optionally, the transmission parameters include at least one parameter, and for the same parameter in the at least one parameter, a value configured by the first sidelink configuration information is greater than a value configured by the second sidelink configuration information.

[0011] Optionally, communicating on an authorized frequency band according to the second sidelink configuration information includes: communicating on an authorized frequency band according to the second sidelink configuration information when a frequency band where a current transmitting carrier and / or a current receiving carrier is located is an authorized frequency band.

[0012] Optionally, communicating on an unlicensed frequency band according to the first sidelink configuration information includes: communicating on an unlicensed frequency band according to the first sidelink configuration information when a frequency band where a current transmitting carrier and / or a current receiving carrier is located is an unlicensed frequency band.

[0013] Optionally, the transmission parameters include any one or more of the following: duration of a timer, a maximum number of hybrid automatic repeat request discontinuous transmission HARQ DTX, and the timer is used for side link management.

[0014] On the other hand, an embodiment of the present application also provides a sidelink transmission method, the method comprising: sending first sidelink configuration information to a terminal device, the first sidelink configuration information being used to configure transmission parameters of an unlicensed frequency band of the sidelink.

[0015] Optionally, the method further includes: sending second sidelink configuration information to the terminal device, wherein the second sidelink configuration information is used to configure transmission parameters of an authorized frequency band of the sidelink.

[0016] 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 the value of the transmission parameter of the authorized frequency band, and the values ​​of the transmission parameter of the unlicensed frequency band and the transmission parameter of the authorized frequency band are different.

[0017] 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 is the ratio between the value of the transmission parameter of the unlicensed frequency band and the value of the transmission parameter of the authorized frequency band.

[0018] Optionally, the transmission parameters include at least one parameter, and for the same parameter in the at least one parameter, a value configured by the first sidelink configuration information is greater than a value configured by the second sidelink configuration information.

[0019] Optionally, the transmission parameters include any one or more of the following: duration of a timer, a maximum number of hybrid automatic repeat request discontinuous transmission HARQ DTX, and the timer is used for side link management.

[0020] On the other hand, an embodiment of the present application further provides a sidelink transmission device, the device comprising: a first processing module and a first communication module;

[0021] The first processing module is used to receive first sidelink configuration information through the first communication module, where the first sidelink configuration information is used to configure transmission parameters of an unlicensed frequency band of the sidelink;

[0022] The first processing module is further configured to communicate in an unlicensed frequency band through the first communication module according to the first sidelink configuration information.

[0023] Optionally, the first processing module is also used 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 also used to communicate on the authorized frequency band through the first communication module according to the second sidelink configuration information.

[0024] 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 the value of the transmission parameter of the authorized frequency band, and the value of the transmission parameter of the unlicensed frequency band is different from the value of the transmission parameter of the authorized frequency band.

[0025] 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 is the ratio between the value of the transmission parameter of the unlicensed frequency band and the value of the transmission parameter of the authorized frequency band.

[0026] Optionally, the transmission parameters include at least one parameter, and for the same parameter in the at least one parameter, a value configured by the first sidelink configuration information is greater than a value configured by the second sidelink configuration information.

[0027] Optionally, the first processing module is specifically used to: when a frequency band in which a current transmitting carrier and / or a current receiving carrier is located is an authorized frequency band, communicate on the authorized frequency band through the communication module according to the second sidelink configuration information.

[0028] Optionally, the first processing module is specifically used to: when a frequency band in which a current transmitting carrier and / or a current receiving carrier is located is an unlicensed frequency band, communicate on the unlicensed frequency band through the communication module according to the first sidelink configuration information.

[0029] Optionally, the transmission parameters include any one or more of the following: duration of a timer, a maximum number of hybrid automatic repeat request discontinuous transmission HARQ DTX, and the timer is used for side link management.

[0030] On the other hand, an embodiment of the present application further provides a sidelink transmission device, the device comprising: a second processing module and a second communication module;

[0031] The second processing module is used to send first sidelink configuration information to the terminal device through the second communication module, where the first sidelink configuration information is used to configure transmission parameters of an unlicensed frequency band of the sidelink.

[0032] Optionally, the second processing module is further used 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 transmission parameters of the authorized frequency band of the sidelink.

[0033] 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 the value of the transmission parameter of the authorized frequency band, and the values ​​of the transmission parameter of the unlicensed frequency band and the transmission parameter of the authorized frequency band are different.

[0034] 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 is the ratio between the value of the transmission parameter of the unlicensed frequency band and the value of the transmission parameter of the authorized frequency band.

[0035] Optionally, the transmission parameters include at least one parameter, and for the same parameter in the at least one parameter, a value configured by the first sidelink configuration information is greater than a value configured by the second sidelink configuration information.

[0036] Optionally, the transmission parameters include any one or more of the following: duration of a timer, a maximum number of hybrid automatic repeat request discontinuous transmission HARQ DTX, and the timer is used for side link management.

[0037] On the other hand, an embodiment of the present application also provides a terminal device, comprising the side link transmission device as described in any of the foregoing items.

[0038] On the other hand, an embodiment of the present application further provides a network device, characterized in that it includes any of the side link transmission devices described above.

[0039] On the other hand, an embodiment of the present application further provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transient storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the methods described in the above items are executed.

[0040] On the other hand, an embodiment of the present application further provides a sidelink transmission device, comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, and the processor executes the methods described in the foregoing items when running the computer program.

[0041] On the other hand, an embodiment of the present application further provides a sidelink transmission device, comprising a memory and a processor, wherein the memory stores a computer program that can be executed on the processor, and when the processor runs the computer program, the above method is executed.

[0042] The sidelink transmission method and device provided in the embodiment of the present application, in view of the characteristic that the terminal device needs to obtain resources through the preemption mechanism when working in the unlicensed frequency band, the network side separately configures the transmission parameters of the unlicensed frequency band of the sidelink of the terminal device, so that the transmission parameters are adapted to the transmission characteristics of the unlicensed frequency band, and avoids misjudging the situation that the terminal device cannot transmit in the unlicensed frequency band due to the failure of preemption of resources as a wireless link failure, thereby improving the reliability of SL link management. Accordingly, when the terminal device is performing sidelink communication, it can communicate on the unlicensed frequency band according to the configured transmission parameters of the unlicensed frequency band of the sidelink.

[0043] Furthermore, by configuring different transmission parameters for authorized frequency bands and unlicensed frequency bands, the corresponding transmission parameters can be adapted to the transmission characteristics of different carriers. Accordingly, the terminal device can communicate based on the frequency band where the current carrier is located, using the transmission parameters corresponding to the frequency band, providing reliable management functions for the transmission of SL links on different frequency bands. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1It is a schematic diagram of an uplink, downlink and sidelink in the prior art;

[0045] Figure 2 is a flow chart of the sidelink transmission method according to an embodiment of the present application;

[0046] Figure 3 This is a schematic diagram of transmission parameter configuration and application in an embodiment of the present application;

[0047] Figure 4 is another schematic diagram of transmission parameter configuration and application in an embodiment of the present application;

[0048] Figure 5 is another schematic diagram of transmission parameter configuration and application in an embodiment of the present application;

[0049] Figure 6 It is a structural schematic diagram of a side link transmission device according to an embodiment of the present application;

[0050] Figure 7 is another structural schematic diagram of the side link transmission device according to an embodiment of the present application;

[0051] Figure 8 It is a schematic diagram of the hardware structure of the electronic device according to the embodiment of the present application. DETAILED DESCRIPTION

[0052] In order to make the above-mentioned purposes, features and beneficial effects of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0053] First, the system to which this application applies and the corresponding terms are explained.

[0054] The technical solution of the present application can be applicable to the fifth generation (5th Generation, 5G) communication system, and can also be applicable to the fourth generation (4th Generation, 4G), third generation (3rd Generation, 3G) communication system, and can also be applicable to various new communication systems in the future, such as the sixth generation (6th Generation, 6G), seventh generation (7th Generation, 7G), etc., but the embodiments of the present application are not limited to this.

[0055] The technical solution of the present 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 (D2D) architecture, and other architectures.

[0056] The devices involved in the embodiments of the present application include core network devices, access network devices and terminal devices.

[0057] 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, such as a base station (BS), a base station controller, a relay node (RN), etc. The base station may be, for example, a base transceiver station (BTS) in a 2G network, a node B (NodeB) in a 3G network, an evolved node B (eNB) in a 4G network, an access point (AP) in a wireless local area network (WLAN), a next generation NodeB (gNB) in a 5G new radio (NR), and an evolved node B (ng-eNB), wherein the gNB and the terminal device communicate using NR technology, and the ng-eNB and the terminal device communicate using Evolved Universal Terrestrial Radio Access (E-UTRA) technology, and both the gNB and the ng-eNB may be connected to the 5G core network. The base station in the embodiment of the present application also includes equipment that provides base station functions in future new communication systems, etc. A base station controller, also known as a base station controller device, is a device that manages base stations, such as a base station controller (BSC) in a 2G network, a radio network controller (RNC) in a 3G network, and may also refer to a device that controls and manages base stations in future new communication systems.

[0058] The terminal device in the embodiments of the present application may also be referred to as a terminal, a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station (MS), a remote station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent or a user device. The terminal device may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN), etc., and the embodiments of the present application are not limited to this.

[0059] When a terminal device transmits data on the SL, it needs to first obtain the SL configuration information, such as the timer configuration (for example, the timer duration configuration), the upper limit of the number of continuous hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) discontinuous transmission (Discontinuous Transmission, DTX) (which can be configured through the field "sl-MaxNumConsecutiveDTX"), and other information. The terminal device performs SL transmission according to the SL configuration information.

[0060] For example, the SL configuration information may include the configuration information of timer T400. After the first terminal device sends a SL RRC reconfiguration message (RRCReconfigurationSidelink) to the second terminal device, timer T400 is started. When timer T400 times out, if no SL RRC reconfiguration failure message (RRCReconfigurationFailureSidelink) or SL RRC reconfiguration completion message (RRCReconfigurationCompleteSidelink) is received from the second terminal device, it is considered that a SL link failure has occurred.

[0061] For another example, the SL configuration information may include the configuration information of the timer T5000. When the SL connection is established, after the first terminal device sends a direct link establishment request message (DIRECT LINK ESTABLISHMENT REQUEST) to the second terminal device, the timer T5000 is started. If the direct link establishment acceptance (DIRECT LINK ESTABLISHMENT ACCEPT) or direct link establishment rejection (DIRECT LINK ESTABLISHMENT REJECT) message is not received before the timer T5000 times out, the direct link establishment request message is resent, or the direct link establishment process is terminated. 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 an upper limit on the number of HARQ DTXs (assuming it is X). When the first terminal device sends any data packet to the second terminal device, if it does not receive HARQ feedback from the second terminal device for X consecutive times, it is considered that an SL link failure has occurred.

[0062] When there are two frequency bands, authorized and unauthorized, on the SL, the terminal device needs to obtain resources on the unauthorized frequency band through the preemption mechanism. If the same set of SL configuration parameters is configured for both the authorized and unauthorized frequency bands, for example, the same T400 duration is used, when the terminal device works on the unauthorized frequency band, there may be a situation where the second terminal device fails to provide feedback due to a failure in preempting resources. When T400 times out, the first terminal device will mistakenly believe that an SL link failure has occurred.

[0063] In view of the above problems, the embodiment of the present application provides a sidelink transmission method, which configures the authorized frequency band and unauthorized frequency band of SL respectively. Accordingly, the terminal device can select the corresponding transmission parameters for SL transmission according to the frequency band where the current carrier is located. Figure 2 , the method comprising:

[0064] 201. A network device sends first sidelink configuration information to a 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.

[0065] The network device may be a core network device or an access network device. If it is the former, the core network device may send the first sidelink configuration information to the access network device, and the access network device transparently transmits the first sidelink configuration information to the terminal device. Exemplarily, the core network device may be an AMF (Access and mobility management function), a ProSe Function (Proximity service function), etc.

[0066] Optionally, the transmission parameters in the present application may include one or more parameters, such as, but not limited to, any one or more of the following parameters: the duration of a timer, a maximum number of HARQ DTX times, etc. The timer is used for sidelink management.

[0067] Exemplarily, the timer may include T400 and / or T5000, and may also include other timers for sidelink management.

[0068] It should be noted that the transmission parameter may introduce a new field into the existing configuration information to indicate the configuration information of the unlicensed link.

[0069] It should be noted that, in actual applications, a new field may be introduced into the existing configuration information to indicate the configuration information of the unauthorized link.

[0070] Optionally, before step 201, the method may further include: the network device generates first sidelink configuration information.

[0071] 202. The terminal device communicates in an unlicensed frequency band according to the first sidelink configuration information.

[0072] Optionally, step 202 may include, in a specific implementation, communicating on the unlicensed frequency band according to the first sidelink configuration information when the frequency band where the current transmitting carrier and / or the current receiving carrier is located is an unlicensed frequency band.

[0073] In order to improve the reliability of the SL link management function, in an embodiment of the present application, the network device separately configures the transmission parameters of the unlicensed frequency band for the terminal device. According to the description above, if the network device uses the transmission parameters of the authorized frequency band on the unlicensed frequency band, it will cause misjudgment of RLF. Therefore, by configuring the transmission parameters for the unlicensed frequency band separately, the transmission parameters suitable for the unlicensed frequency band can be flexibly configured according to the characteristics of the unlicensed frequency band, thereby improving the reliability of the SL link management function.

[0074] Optional, see Figure 2The method may further include: 203, the network device sends second sidelink configuration information to the terminal device, the second sidelink configuration information is used to configure the transmission parameters of the authorized frequency band of the sidelink. Correspondingly, the terminal device receives the second sidelink configuration information.

[0075] The first sidelink configuration information and the second sidelink configuration information can be placed in the same message or in different messages, which is not limited in this application. The message can be a proprietary signaling or a system message, which is not limited in this embodiment of the application.

[0076] Optionally, before step 203, the method further includes: the network device generates second sidelink configuration information.

[0077] 204. The terminal device communicates on the authorized frequency band according to the second sidelink configuration information.

[0078] Optionally, step 204 may include, in specific implementation:

[0079] When a frequency band where a current transmitting carrier and / or a current receiving carrier resides is an authorized frequency band, communication is performed on the authorized frequency band according to the second sidelink configuration information.

[0080] When performing sidelink transmission, the terminal device can select corresponding transmission parameters for communication based on the configuration information for unlicensed frequency bands and licensed frequency bands configured by the network device and the frequency band where the current carrier is located.

[0081] The execution order of any one of step 201 and step 202 and any one of step 203 and step 204 is irrelevant.

[0082] 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 the value of the transmission parameter of the authorized frequency band, and the value of the transmission parameter of the unlicensed frequency band is different from the value of the transmission parameter of the authorized frequency band.

[0083] Optionally, the information used to determine the value of the transmission parameter of the unlicensed frequency band may be in the following two situations:

[0084] 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.

[0085] In case 1, the terminal device can directly determine the transmission parameters of the unlicensed frequency band based on the first sidelink configuration information.

[0086] 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.

[0087] In case 2, the terminal device can calculate the transmission parameters of the unlicensed frequency band according to the ratio and the value of the transmission parameters of the authorized frequency band.

[0088] In case 2, it should be noted that for different parameters in the transmission parameters, the ratio may be the same or different, and this application does not limit it. If the ratio is the same for all parameters in the transmission parameters, the first sidelink configuration information may be configured with only one value, thereby reducing signaling overhead.

[0089] 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.

[0090] In case 3, the terminal device can calculate the transmission parameters of the unlicensed frequency band according to the difference and the value of the transmission parameters of the authorized frequency band.

[0091] In case 3, it should be noted that for different parameters in the transmission parameters, the difference may be the same or different, and this application does not limit it. If the difference is the same for all parameters in the transmission parameters, the first sidelink configuration information may be configured with only one value, thereby reducing signaling overhead.

[0092] Of course, the information used to determine the value of the transmission parameter of the unlicensed frequency band may also be other information, and this application does not limit this.

[0093] Optionally, the transmission parameters include at least one parameter, and for the same parameter in the at least one parameter, the value configured by the first side link configuration information is greater than the value configured by the second side link configuration information, such as 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, the SL link will not be misjudged as a failure when T400 reaches duration T2 due to the failure of the opposite terminal device to seize resources and the lack of timely feedback. Instead, the SL link will not be judged as a failure until T400 reaches duration T1, which can better guarantee the transmission on the unlicensed frequency band and improve the reliability of SL link management.

[0094] It should be noted that, in actual applications, the transmission parameters corresponding to the authorized frequency band and the unlicensed frequency band may be fully or partially sent by the network device to the terminal device or provided by the protocol, which is not limited in the embodiments of the present application.

[0095] In the embodiment of the present application, in view of the fact that the terminal device needs to obtain resources through the preemption mechanism when working 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, two sets of transmission parameters are used, namely, the transmission parameters of the unlicensed frequency band of the side link and the transmission parameters of the authorized frequency band are configured respectively. Further, different transmission parameters are configured for the authorized frequency band and the unlicensed frequency band of the side link. Accordingly, when the terminal device performs side link transmission, it can use the transmission parameters corresponding to the frequency band to perform side link transmission according to the frequency band where the current carrier is located, that is, according to the transmission parameters of the configured unlicensed frequency band of the side link, communicate on the unlicensed frequency band, and according to the transmission parameters of the configured authorized frequency band of the side link, communicate on the authorized frequency band. Since different transmission parameters are configured for the authorized frequency band and the unlicensed frequency band, the corresponding transmission parameters can be adapted to the transmission characteristics of different carriers, effectively avoiding the situation where the terminal device cannot transmit due to the failure of preempting resources and is misjudged as the situation of SL link failure, thereby improving the reliability of the SL link management function.

[0096] Exemplarily, when the access network device configures the above transmission parameters, there may be a variety of different configuration methods, such as:

[0097] (1) When the terminal device is in a 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.

[0098] (2) When the terminal device is in an idle state or an inactive state, the access network device may broadcast the first sidelink configuration information and / or the second sidelink SL configuration information via a system information block (SIB).

[0099] In addition, when the terminal device is located outside the coverage of the access network device and cannot receive the signal of the access network device, the terminal device can also obtain corresponding transmission parameters through the saved pre-configuration information.

[0100] In order to make the above embodiments of the present application clearer, the following Figure 3 , Figure 4 and Figure 5 The embodiment shown is an exemplary description of the implementation process of the above embodiment. Figure 3 , Figure 4 and Figure 5 The embodiment shown differs in that Figure 3 The transmission parameters of the embodiment shown include the duration of T5000. Figure 4 The transmission parameters of the embodiment shown include an upper limit on the number of HARQ DTXs. Figure 5In the illustrated embodiment, the transmission parameters include the duration of T5000. Figure 3 , Figure 4 and Figure 5 The process shown in the figure takes the network device as a base station as an example. Figure 3 , Figure 4 and Figure 5 The implementation process of is described separately. Figure 3 The figure shows a schematic diagram of transmission parameter configuration and application in an embodiment of the present application.

[0101] In step 31, the base station sends first sidelink configuration information to the first terminal device, such as broadcasting the sidelink configuration information through SIB, to configure the transmission parameters of the unlicensed frequency band of the sidelink, wherein the transmission parameters include the duration of the timer T5000 corresponding to the unlicensed frequency band.

[0102] It should be noted that the transmission parameters corresponding to the authorized frequency band can be determined by the second sidelink configuration information sent by the base station, or provided by the protocol.

[0103] In step 32, the first terminal device saves the transmission parameters of the unlicensed frequency band configured by the base station.

[0104] In step 33, when the first terminal device needs to establish a 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.

[0105] If the frequency band where the current transmitting carrier is located is an unlicensed frequency band, in step 34, the first terminal device starts the timer T5000 corresponding to the unlicensed frequency band.

[0106] The first terminal device does not receive a direct link establishment acceptance (DIRECT LINK ESTABLISHMENT ACCEPT) or a direct link establishment rejection (DIRECT LINK ESTABLISHMENT REJECT) message sent by the second terminal device before the timer T5000 expires, so in step 35, the first terminal device resends a direct link establishment request message.

[0107] In step 36, the timer T5000 times out and the first terminal device determines that an SL link failure has occurred.

[0108] Since the duration of T5000 in the unlicensed frequency band is larger than that of T5000 in the authorized frequency band, for example, the duration of T5000 in the unlicensed frequency band is t1, and the duration of T5000 in the authorized frequency band is t2, t1>t2, a longer waiting time can be provided for receiving the direct link establishment reception or direct link establishment rejection message, thereby compensating to a certain extent the time occupied by the second terminal device that cannot send messages due to the failure to preempt resources, thereby improving the reliability of side link management.

[0109] like Figure 4 , which is another schematic diagram of transmission parameter configuration and application in an embodiment of the present application.

[0110] In step 41, the base station sends first side link configuration information and second side link configuration information to the first terminal device. For example, the above configuration information can be sent through dedicated signaling. The first side link configuration information includes transmission parameters corresponding to the unlicensed frequency band: an upper limit on the number of consecutive HARQ DTXs (for example, 3).

[0111] In step 42, the first terminal device sends data A to the second terminal device, and because no HARQ feedback is received from the second terminal device, the first terminal device repeatedly sends data A.

[0112] If the frequency band of the current receiving carrier is an unlicensed frequency band, in step 43, after the first terminal device repeatedly sends data A to the second terminal device three times, it is determined that an SL link failure has occurred.

[0113] Since the upper limit of the HARQ DTX number in the unlicensed frequency band (assumed to be 3) is greater than the upper limit of the HARQ DTX number in the licensed frequency band (assumed to be 2), after the first terminal sends a data packet to the second terminal, it will be considered that an SL link failure has occurred if no HARQ feedback is received from the second terminal device for three consecutive times. Compared with the upper limit of the HARQ DTX number in the licensed frequency band, the number of repeated sending of the data packet is increased, which also makes up for the number of data retransmissions occupied by the second terminal device due to the inability to provide HARQ feedback due to the failure to seize resources, thereby improving the reliability of side link management.

[0114] like Figure 5 , which is another schematic diagram of transmission parameter configuration and application in an embodiment of the present application.

[0115] In step 51, the base station sends first sidelink configuration information and second sidelink configuration information to the first terminal device, and the first terminal device receives the first sidelink configuration information and the second sidelink configuration information sent by the base station, the second sidelink configuration information includes the duration T1 of the timer T400 of the authorized frequency band, and the first sidelink configuration information includes the difference △T between the duration T2 of the timer T400 corresponding to the unauthorized frequency band and the timer T400 corresponding to the authorized frequency band, and △T is greater than 0.

[0116] 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.

[0117] In step 53, the first terminal device needs to exchange configuration information with the second terminal device, and the first terminal device sends a SL RRC reconfiguration message to the second terminal device.

[0118] If the frequency band where the current transmission 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.

[0119] When the timer T400 reaches T1+ΔT, the first terminal device does not receive the SL RRC reconfiguration failure message or the SL RRC reconfiguration completion message replied by the second terminal device, and therefore in step 55, it is determined that the SL link failure has occurred.

[0120] Since the duration of T400 in the unlicensed frequency band is larger than that of T400 in the licensed frequency band, a longer waiting time can be provided for receiving the SL RRC reconfiguration failure message or the SL RRC reconfiguration completion message, thereby compensating to a certain extent for the time occupied by the second terminal device when the message cannot be sent due to the failure to preempt resources, thereby improving the reliability of side link management.

[0121] 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 present application.

[0122] The sidelink transmission method provided in the embodiment of the present application configures the transmission parameters of the authorized frequency band and the unauthorized frequency band of the sidelink respectively, in view of the characteristic that the terminal device needs to obtain resources through the preemption mechanism when working in the unauthorized frequency band, so that the configured transmission parameters can be adapted to the authorized frequency band and the unauthorized frequency band respectively. Accordingly, when the terminal device performs SL communication, it can select the transmission parameters corresponding to the frequency band according to the frequency band where the current carrier is located for communication. Since the transmission parameters of the authorized frequency band and the unauthorized frequency band are configured separately, the corresponding transmission parameters can be adapted to the transmission characteristics of different carriers, effectively avoiding the situation where the receiving terminal device cannot provide feedback due to the failure of preempting resources as the situation of SL link failure, thereby improving the reliability of SL link management.

[0123] Accordingly, the embodiment of the present application also provides a side link transmission device, such as Figure 6 As shown, in a non-limiting embodiment, the sidelink transmission device 600 includes: a first processing module 601 and a first communication module 602. Wherein: the first processing module 601 is used to receive 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 also used to communicate on the unlicensed frequency band through the first communication module 602 according to the first sidelink configuration information.

[0124] Further, in another non-limiting embodiment, the above-mentioned first processing module 601 is also used to receive second side link configuration information through the first communication module 602, and the second side link configuration information is used to configure the transmission parameters of the authorized frequency band of the side link; the first processing module 601 is also used to communicate on the authorized frequency band through the first communication module 602 according to the second side link configuration information.

[0125] It should be noted that the above-mentioned first processing module 601 can specifically be that when the frequency band where the current transmitting carrier and / or the current receiving carrier is located is an authorized frequency band, communication is performed on the authorized frequency band through the communication module according to the second sidelink configuration information; and / or when the frequency band where the current transmitting carrier and / or the current receiving carrier is located is an unlicensed frequency band, communication is performed on the unlicensed frequency band through the communication module according to the first sidelink configuration information.

[0126] Accordingly, the present application also provides a terminal device, comprising the above Figure 6 The side link transmission device shown. The network device may be a core network device or a base station.

[0127] Accordingly, the embodiment of the present application also provides a side link transmission device, such as Figure 7As shown, in a non-limiting embodiment, the sidelink transmission device 700 includes the following modules: a second processing module 701 and a second communication module 702. Wherein: the second processing module 701 is used to send 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 transmission parameters of the unlicensed frequency band of the sidelink.

[0128] In another non-limiting embodiment, the second processing module 701 is further used to send second sidelink configuration information to the terminal device through the second communication module 702, where the second sidelink configuration information is used to configure transmission parameters of the authorized frequency band of the sidelink.

[0129] Regarding the form, content and sending method of the above-mentioned first side link configuration information and second side link configuration information, please refer to the description in the previous embodiment of the side link transmission method of the present application, which will not be repeated here.

[0130] Accordingly, the embodiment of the present application also provides a network device, including the above Figure 7 The side link transmission device shown. The network device may be a core network device or a base station.

[0131] For more details about the working principles and working methods of the above-mentioned devices, please refer to the relevant descriptions in the previous corresponding method embodiments, which will not be repeated here.

[0132] The sidelink transmission device provided in the embodiment of the present application configures the transmission parameters of the unlicensed frequency band of the sidelink separately in view of the characteristic that the terminal device needs to obtain resources through the preemption mechanism when working in the unlicensed frequency band, so that the configured transmission parameters can be adapted to the transmission characteristics of the unlicensed frequency band respectively, avoiding the situation where the terminal device cannot transmit in the unlicensed frequency band due to the failure of preemption of resources as a wireless link failure, thereby improving the reliability of SL link management. Accordingly, when the terminal device performs sidelink communication, it can communicate according to the configured transmission parameters of the unlicensed frequency band of the sidelink.

[0133] Furthermore, by configuring different transmission parameters for authorized frequency bands and unlicensed frequency bands, the corresponding transmission parameters can be adapted to the transmission characteristics of different carriers. Accordingly, the terminal device can communicate based on the frequency band where the current carrier is located, using the transmission parameters corresponding to the frequency band, providing reliable management functions for the transmission of SL links on different frequency bands.

[0134] In a specific implementation, the above-mentioned side link transmission device can correspond to a chip with corresponding functions in the network equipment and / or terminal equipment, such as SOC (System-On-a-Chip), baseband chip, chip module, etc.

[0135] In a specific implementation, each module / unit included in each device or product described in the above embodiments may be a software module / unit or a hardware module / unit, or may be partly a software module / unit and partly a hardware module / unit.

[0136] For example, for each device or product applied to or integrated in a chip, each module / unit contained therein may be implemented in the form of hardware such as circuits, or at least some of the modules / units may be implemented in the form of software programs, which run on a processor integrated inside the chip, and the remaining (if any) modules / units may be implemented in the form of hardware such as circuits; for each device or product applied to or integrated in a chip module, each module / unit contained therein may be implemented in the form of hardware such as circuits, and different modules / units may be located in the same component (such as a chip, circuit module, etc.) or different components of the chip module, or at least some of the modules / units may be implemented in the form of software programs. The element can be implemented in the form of a software program, which runs on a processor integrated inside the chip module, and the remaining (if any) modules / units can be implemented in the form of hardware such as circuits; for various devices and products applied to or integrated in the terminal, the various modules / units contained therein can be implemented in the form of hardware such as circuits, and different modules / units can be located in the same component (for example, chip, circuit module, etc.) or in different components in the terminal, or, at least some modules / units can be implemented in the form of a software program, which runs on a processor integrated inside the terminal, and the remaining (if any) modules / units can be implemented in the form of hardware such as circuits.

[0137] An embodiment of the present application further provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transient storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are executed.

[0138] The side link transmission method provided in the embodiment of the present application can be executed by the following devices: a chip, a chip module, a communication device, etc.

[0139] An embodiment of the present application also provides a side link transmission device, including a memory and a processor, wherein the memory stores a computer program that can be executed on the processor, and the processor executes the steps in the above-mentioned method embodiments when running the computer program.

[0140] Please refer to Figure 8 , is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application. The electronic device includes a processor 801, a memory 802 and a transceiver 803.

[0141] Processor 801 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present application. Processor 801 may also include multiple CPUs, and processor 801 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. The processor here may refer to one or more devices, circuits, or processing cores for processing data (such as computer program instructions).

[0142] The memory 802 may be a ROM or other types of static storage devices that can store static information and instructions, a RAM or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer, and the embodiments of the present application do not impose any restrictions on this. The memory 802 may exist independently (in this case, the memory 802 may be located outside the device or inside the device), or it may be integrated with the processor 801. Among them, the memory 802 may contain a computer program code. The processor 801 is used to execute the computer program code stored in the memory 802, thereby realizing the method provided in the embodiments of the present application.

[0143] The processor 801, the memory 802 and the transceiver 803 are connected via a bus. The transceiver 803 is used to communicate with other devices or communication networks. 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 used to implement the sending function in the transceiver 803 can be regarded as a transmitter, and the transmitter is used to perform the sending step in the embodiment of the present application.

[0144] when Figure 8 The schematic diagram of the structure shown in FIG. 1 is used to illustrate the structure of the terminal device involved in the above embodiment. 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 Figure 2 or Figure 3 or Figure 4 or Figure 5 The processor 801 may communicate with other network entities through the transceiver 803, for example, communicating with the above-mentioned 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 may control the transceiver 803 to receive downlink signaling or downlink data.

[0145] when Figure 8 The schematic diagram of the structure shown in FIG. 1 is used to illustrate the structure of the network device involved in the above embodiment. 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 Figure 2 or Figure 3 or Figure 4 or Figure 5 The processor 801 may communicate with other network entities through the transceiver 803, for example, with the above-mentioned terminal device. The memory 802 is used to store program codes and data of network devices. When the processor runs the computer program, it may control the transceiver 803 to send downlink data or downlink signaling.

[0146] It should be understood that the term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article indicates that the associated objects before and after are in an "or" relationship.

[0147] The "plurality" appearing in the embodiments of the present application refers to two or more.

[0148] The first, second, etc. descriptions appearing in the embodiments of the present application are only used for illustration and distinction of the description objects. There is no order, nor do they indicate any special limitation on the number of devices in the embodiments of the present application, and cannot constitute any limitation on the embodiments of the present application.

[0149] The various embodiments provided in this application can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, a computer, a server or a data center to another website site, a computer, a server or a data center by wired or wireless means. It should be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0150] In the several embodiments provided in the present 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 merely schematic; 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 integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0151] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0152] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically arranged separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0153] 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 shall be subject to the scope defined by the claims.

Claims

1. 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 an unlicensed frequency band of the sidelink; the transmission parameters include any one or more of the following: a timer duration, a maximum number of hybrid automatic repeat request discontinuous transmission HARQ DTX times, and the timer is used to perform sidelink management; When a frequency band where a current transmitting carrier and / or a current receiving carrier is located is an unlicensed frequency band, communicating on the unlicensed frequency band according to the first sidelink configuration information; receiving second sidelink configuration information, where the second sidelink configuration information is used to configure transmission parameters of an authorized frequency band of the sidelink; When a frequency band where a current transmitting carrier and / or a current receiving carrier resides is an authorized frequency band, communication is performed on the authorized frequency band according to the second sidelink configuration information.

2. The method according to claim 1, characterized in that 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 the value of the transmission parameter of the authorized frequency band, and the value of the transmission parameter of the unlicensed frequency band is different from the value of the transmission parameter of the authorized frequency band.

3. The method according to claim 2, characterized in that 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 is the ratio between the value of the transmission parameter of the unlicensed frequency band and the value of the transmission parameter of the authorized frequency band.

4. According to the method according to claim 1, the transmission parameters include at least one parameter, and for the same parameter in the at least one parameter, the value configured by the first sidelink configuration information is greater than the value configured by the second sidelink configuration information.

5. 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 transmission parameters include any one or more of the following: the duration of the timer, the maximum number of hybrid automatic repeat request discontinuous transmission HARQ DTX, and the timer is used to perform sidelink management; 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.

6. The method according to claim 5, characterized in that 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 the value of the transmission parameter of the authorized frequency band, and the values ​​of the transmission parameter of the unlicensed frequency band are different from those of the authorized frequency band.

7. The method according to claim 6, characterized in that 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 is the ratio between the value of the transmission parameter of the unlicensed frequency band and the value of the transmission parameter of the authorized frequency band.

8. According to the method of claim 5, the transmission parameters include at least one parameter, and for the same parameter in the at least one parameter, the value configured by the first sidelink configuration information is greater than the value configured by the second sidelink configuration information.

9. A sidelink transmission device, characterized in that: The device comprises: a first processing module and a first communication module; The first processing module is used to receive first sidelink configuration information through the first communication module, where the first sidelink configuration information is used to configure transmission parameters of an unlicensed frequency band of the sidelink; the transmission parameters include any one or more of the following: a timer duration, a maximum number of hybrid automatic repeat request discontinuous transmission HARQ DTX, and the timer is used to perform sidelink management; The first processing module is further configured to communicate on the unlicensed frequency band through the first communication module according to the first sidelink configuration information when the frequency band where the current transmitting carrier and / or the current receiving carrier is located is an unlicensed frequency band; The first processing module is further used to receive second sidelink configuration information through the first communication module, where the second sidelink configuration information is used to configure transmission parameters of an authorized frequency band of the sidelink; The first processing module is further configured to communicate on the authorized frequency band through the first communication module according to the second sidelink configuration information when the frequency band where the current transmitting carrier and / or the current receiving carrier is located is an authorized frequency band.

10. The device according to claim 9, characterized in that 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 the value of the transmission parameter of the authorized frequency band, and the value of the transmission parameter of the unlicensed frequency band is different from the value of the transmission parameter of the authorized frequency band.

11. The device according to claim 10, characterized in that 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 is the ratio between the value of the transmission parameter of the unlicensed frequency band and the value of the transmission parameter of the authorized frequency band.

12. The apparatus according to claim 9, wherein the transmission parameters include at least one parameter, and for the same parameter in the at least one parameter, a value configured by the first sidelink configuration information is greater than a value configured by the second sidelink configuration information.

13. A sidelink transmission device, characterized in that: The device comprises: a second processing module and a second communication module; The second processing module is used to send first sidelink configuration information to the terminal device through the second communication module, where the first sidelink configuration information is used to configure transmission parameters of the unlicensed frequency band of the sidelink; the transmission parameters include any one or more of the following: the duration of the timer, the maximum number of hybrid automatic repeat request discontinuous transmission HARQ DTX, and the timer is used to perform sidelink management; The second processing module is further used 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 transmission parameters of the authorized frequency band of the sidelink.

14. The device according to claim 13, characterized in that 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 the value of the transmission parameter of the authorized frequency band, and the values ​​of the transmission parameter of the unlicensed frequency band are different from those of the authorized frequency band.

15. The device according to claim 14, characterized in that 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 is the ratio between the value of the transmission parameter of the unlicensed frequency band and the value of the transmission parameter of the authorized frequency band.

16. The apparatus according to claim 13, wherein the transmission parameters include at least one parameter, and for the same parameter in the at least one parameter, a value configured by the first sidelink configuration information is greater than a value configured by the second sidelink configuration information.

17. A terminal device, characterized in that: Comprising a sidelink transmission device as described in any one of claims 9-12.

18. A network device, characterized in that: Comprising a sidelink transmission device as described in any one of claims 13-16.

19. A computer-readable storage medium, wherein the computer-readable storage medium is a non-volatile storage medium or a non-transient storage medium, and a computer program is stored thereon, wherein: When the computer program is executed by a processor, the method described in any one of claims 1 to 4 is executed, or the method described in any one of claims 5 to 8 is executed.

20. A sidelink transmission device, comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, characterized in that: When the processor runs the computer program, the processor performs the method described in any one of claims 1 to 4 or the method described in any one of claims 5 to 8.

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