Information transmission method and terminal

Abstract

The embodiments of the present application provide an information transmission method and a terminal. The method comprises: on the basis of a channel access priority of first sidelink information and a first time slot, determining a second time slot; sending second sidelink information in the second time slot, wherein the second sidelink information is used for indicating the channel access priority, the channel access priority is used for a second terminal to determine a time-domain area, the second terminal determines one or more time-frequency resources on the basis of the time-domain area, and at least one of the one or more time-frequency resources is used for the second terminal to transmit third sidelink information; and sending the first sidelink information in the first time slot.

Description

Information transmission method and terminal

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on December 14, 2023, with application number 202311729366.8 and invention name “A method for information transmission and a terminal”. The entire contents of the Chinese patent application are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of communications, and in particular to an information transmission method and a terminal. Background Art

[0004] In a sidelink (SL) communication system, when services need to be transmitted between user equipment (UE), the services between UEs do not pass through the network side, that is, they do not pass through the cellular link between the UE and the base station. Instead, they are transmitted directly from the data source UE to the target UE via the sidelink. This direct communication mode between UEs has characteristics that are significantly different from the communication mode of traditional cellular systems. Typical applications of sidelink communication include device-to-device (D2D) communication and vehicle-to-everything (V2X) communication. Among them, V2X communication includes vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P), and vehicle-to-infrastructure (V2I). For short-range communication users that can use sidelink communication, sidelink communication not only saves wireless spectrum resources, but also reduces the data transmission pressure of the core network. It can reduce system resource utilization, increase the spectrum efficiency of the cellular communication system, reduce communication latency, and significantly save network operating costs. In Sidelink communication, the terminal device can monitor the usage of resources within the SL resource pool and, based on the monitoring results, autonomously select resources within the SL resource pool to send signaling / data.

[0005] On an unlicensed spectrum, a communication device needs to perform a channel access process before using time-frequency resources. The channel access process is used to determine whether the channel is available (or whether the channel is idle). A communication device can perform a channel access process on one or more channels to determine whether the channel is available. A channel here refers to a carrier or part of a carrier composed of a group of continuous resource blocks (RB). The frequency domain resources corresponding to a channel here belong to the shared spectrum. The channel access process here can also be called a Listen Before Talk (LBT) process. The first communication device determines whether the channel is occupied through a channel access process for one or more channels. If the first communication device determines that the channel is not occupied, it means that the terminal can use the channel for transmission and no LBT failure occurs (i.e., LBT is successful).

[0006] Figure 3 is a schematic diagram of terminal time-frequency resources during the channel access process in the related art. When sidelink communication is applied in unlicensed spectrum, as shown in Figure 3, even though the time-frequency resources of UE1 and UE2 are orthogonal, UE2 can still affect UE1's sidelink information transmission. In unlicensed spectrum, the time interval for UE1 to perform the channel access process is [t1, t2]. The overlap of UE2's transmission and the time interval [t1, t2] during which UE1 performs the channel access process will cause UE1's channel access to fail, i.e., UE1 will determine that the channel is unavailable, and thus UE1 will not be allowed to transmit sidelink information on the time-frequency resources of time slot n+3 in Figure 3. More specifically, for channel availability assessment, UE1 determines whether the channel is available based on one or more determinations of whether the received energy on the channel exceeds a threshold. When UE2's transmission overlaps the time interval [t1, t2] during which UE1 performs the channel access process, UE1's received energy on the channel includes UE2's energy, which can easily cause UE1's received energy on the channel to exceed the threshold, resulting in UE1's channel access failure and, consequently, the inability of UE1 to transmit sidelink information. Since UE2's transmission overlaps with the time interval [t1, t2] during which UE1 performs the channel access process, UE1 fails to perform the channel access process. This is called UE2's transmission blocking UE1's channel access process, or UE2's transmission blocking UE1's Listen Before Talk (LBT) process.

[0007] In a side link, a UE sends and receives information within its corresponding SL resource pool. When UE1 and UE2 are located in different SL resource pools, in many cases, UE2 will not receive communication information from the SL resource pool where UE1 is located. As a result, UE2 is unaware of the LBT blocking it is causing to UE1, making it difficult to prevent UE2 from causing LBT blocking to UE1.

[0008] In summary, there is no good solution to the above problems.

[0009] Summary of the Invention

[0010] The embodiments of the present application provide an information transmission method and a terminal to at least solve the problem in related technologies that it is difficult for user equipment in different side link resource pools to avoid channel access process blocking.

[0011] According to one embodiment of the present application, an information transmission method is provided, which is applied to a first terminal, and the method includes: determining a second time slot based on the channel access priority of the first side link information and the first time slot, wherein the second time slot is before the first time slot, the first time slot is located in the first side link resource pool, and the second time slot is located in the second side link resource pool; sending second side link information in the second time slot, wherein the second side link information is used to indicate the channel access priority, and the channel access priority is used for the second terminal to determine a time domain area, and the second terminal determines one or more time-frequency resources based on the time domain area, and at least one of the one or more time-frequency resources is used for the second terminal to transmit third side link information; sending the first side link information in the first time slot.

[0012] According to one embodiment of the present application, an information transmission method is provided, which is applied to a second terminal, and the method includes: receiving second side link information sent by a first terminal in a second time slot; determining the channel access priority of the first side link information based on the second side link information, wherein the first side link information is the side link information sent by the first terminal after the second side link information; determining a time domain area based on the channel access priority and the second time slot; determining one or more time-frequency resources based on the time domain area; and transmitting third side link information on at least one time-frequency resource among the time-frequency resources.

[0013] According to another embodiment of the present application, a terminal is provided for transmitting information according to the steps in any of the above method embodiments.

[0014] According to another embodiment of the present application, a computer-readable storage medium is provided, in which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above method embodiments are executed.

[0015] According to another embodiment of the present application, an electronic device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a block diagram of the hardware structure of the information transmission method according to an embodiment of the present application;

[0017] FIG2 is a flow chart (I) of an information transmission method according to an embodiment of the present application;

[0018] FIG3 is a schematic diagram of terminal time-frequency resources during channel access in the related art;

[0019] FIG4 is a flowchart (II) of the information transmission method according to an embodiment of the present application;

[0020] FIG5 is a schematic diagram of time-frequency resources of first side link information and second side link information in one embodiment of the present application;

[0021] FIG6 is a schematic diagram of the structure of the second side link information in a time slot in one embodiment of the present application (I);

[0022] FIG7 is a schematic diagram (II) of the structure of the second side link information in a time slot in one embodiment of the present application. DETAILED DESCRIPTION

[0023] The embodiments of the present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] It should be noted that the terms "first", "second", etc. in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0025] The method embodiments provided in the embodiments of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 is a hardware structure block diagram of the information transmission method of the embodiment of the present application. As shown in Figure 1, the hardware board may include one or more (only one is shown in Figure 1) processors 12 (the processor 12 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device) and a memory 14 for storing data, wherein the above-mentioned mobile terminal may also include a transmission device 16 and an input and output device 18 for communication functions. It can be understood by those skilled in the art that the structure shown in Figure 1 is only for illustration, and it does not limit the structure of the above-mentioned mobile terminal. For example, the mobile terminal may also include more or fewer components than those shown in Figure 1, or have a configuration different from that shown in Figure 1.

[0026] The memory 14 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the information transmission method in the embodiment of the present application. The processor 12 executes various functional applications and information transmission methods by running the computer programs stored in the memory 14, that is, implements the above-mentioned method. The memory 14 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 14 may further include a memory remotely located relative to the processor 12, and these remote memories may be connected to the mobile terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0027] The transmission device 16 is used to receive or send data via a network. Examples of the aforementioned network may include a wireless network provided by a telecommunications provider. In one embodiment, the transmission device 16 includes a network interface controller (NIC), which can be connected to other network devices via a base station to enable communication with the Internet. In another embodiment, the transmission device 16 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0028] In one embodiment of the present application, an information transmission method is provided, which is applied to a first terminal. FIG2 is a flow chart (I) of the information transmission method according to an embodiment of the present application. As shown in FIG2 , the flow includes the following steps.

[0029] Step S202: Determine a second time slot based on the channel access priority of the first side link information and the first time slot, wherein the second time slot is before the first time slot, the first time slot is located in the first side link resource pool, and the second time slot is located in the second side link resource pool.

[0030] Step S204: Send second side link information in the second time slot, wherein the second side link information is used to indicate the channel access priority, the channel access priority is used for the second terminal to determine a time domain area, the second terminal determines one or more time-frequency resources based on the time domain area, and at least one of the one or more time-frequency resources is used for the second terminal to transmit third side link information.

[0031] Step S206: Send the first side link information in the first time slot.

[0032] In this embodiment, the Channel Access Priority Class (CAPC) is used to enable a second terminal that receives second-side link information to avoid using time domain resources or time-frequency resources that could cause LBT congestion in the transmission of the first-side link information of the first terminal, based on the channel access priority. The time domain region determined by the second terminal can be used for the channel access process of the first terminal, and the time-frequency resources determined by the second terminal based on the time domain region can avoid this time domain region, thereby ensuring smooth information transmission and avoiding congestion in the channel access process.

[0033] In this embodiment, there may be one or more second terminals. All second terminals that receive the second side link information will avoid using time domain resources or time-frequency resources that may cause LBT blocking.

[0034] In an embodiment of the present application, through the above-mentioned steps S202 to S206, the second side link information is sent before the first side link information is sent, and other terminals are notified in advance to avoid their use of time domain resources or time-frequency resources that may cause LBT congestion, thereby solving the problem in the related technology that it is difficult for user equipment in different side link resource pools to avoid channel access process congestion, and achieving the technical effect of avoiding information transmission congestion.

[0035] In some embodiments, the method further includes step S201, determining resources of the second side link information in a time slot. This step can be performed before, after, or simultaneously with step S202, and this application does not limit this.

[0036] In some embodiments, the resources of the second side link information in a time slot may include any one or more combinations of frequency domain resources, time domain resources, time domain length, and code domain resources of the second side link information.

[0037] In some embodiments, step S201 may include at least one of the following: step S2012, determining the frequency domain resources of the second side link information according to the channel access priority; step S2014, determining the time domain resources of the second side link information according to the channel access priority; step S2016, determining the time domain length of the second side link information according to the channel access priority; step S2018, determining the code domain resources of the second side link information according to the channel access priority.

[0038] In this embodiment, the mapping relationship between the channel access priority and the frequency domain resources, time domain resources, time domain length and code domain resources can be pre-configured. Based on the channel access priority, the corresponding resources can be directly searched.

[0039] In some embodiments, the first side link resource pool and the second side link resource pool are side link resource pools of different types.

[0040] In an exemplary embodiment, the first side link resource pool is a dedicated resource pool for a side link positioning reference signal, and the second side link resource pool is a shared resource pool for a side link positioning reference signal and a physical side link shared channel or a physical side link shared channel resource pool.

[0041] In another exemplary embodiment, the first side link resource pool is a shared resource pool of the side link positioning reference signal and a physical side link shared channel or a physical side link shared channel resource pool, and the second side link resource pool is a dedicated resource pool for the side link positioning reference signal.

[0042] In some embodiments, the frequency domain resources of the first side link information include multiple first resource blocks, wherein the first resource blocks belong to a first frequency domain set; the frequency domain resources of the second side link resource pool include a second frequency domain set; wherein the first frequency domain set and the second frequency domain set include at least one resource block set, each resource block set contains multiple consecutive resource blocks, and the intersection of different resource block sets is empty.

[0043] In some embodiments, the method may further include: step S2010, determining the frequency domain resources of the second side link information.

[0044] In this embodiment, step S2010 may include: marking the intersection of the first frequency domain set and the second frequency domain set as a third frequency domain set; and using at least one third resource block in the third frequency domain set as the frequency domain resource of the second side link information.

[0045] In an exemplary embodiment, the third frequency domain set (including at least one resource block set) for sending the second side link information by the first terminal is an overlap of the following two: the resource block set included in the second side link resource pool in the frequency domain (i.e., the second frequency domain set) and the resource block set to which the frequency domain of the first side link information belongs (i.e., the first frequency domain set).

[0046] In an exemplary embodiment, the first terminal may send the second side link information in each resource block set in the third frequency domain set respectively, and the second side link information transmitted on different resource block sets is the same.

[0047] In an exemplary embodiment, when the first terminal sends the second side link information in a resource block set, the second side link information only occupies one or more resource blocks in the resource block set.

[0048] In some embodiments, step S202 determines the second time slot according to the channel access priority of the first side link information and the first time slot, and may include the following steps.

[0049] Step S2022: Determine the number of time slots N according to the channel access priority, wherein there is a mapping relationship between the channel access priority and the number of time slots N, wherein N is greater than or equal to 0.

[0050] Step S2024: Determine the time slot in the second side link resource pool that is earlier than the first target time slot and closest to the first target time slot as the second time slot, wherein the first target time slot is the Nth time slot before the first time slot.

[0051] In this embodiment, there is a mapping relationship between the channel access priority and the number of time slots. Generally, different channel access priorities correspond to different values ​​of the number of time slots.

[0052] In some embodiments, the channel access priority is equivalent to the number of time slots. The second side link information can be used to indicate the channel access priority corresponding to the first side link information. Similarly, the second side link information can also be used to indicate the number of time slots N corresponding to the first side link information. The first time slot and the second time slot are separated by at least N time slots. N is a non-negative integer.

[0053] In some embodiments, the number of time slots N may also be configured through Radio Resource Control (RRC) signaling, or the number of time slots N may also be a pre-configured value.

[0054] In some embodiments, before step S202, the method further includes: step S2002, receiving side link control information (Sidelink Control Information, SCI for short) sent by the base station, wherein the side link control information carries at least one channel access priority and the number of time slots corresponding to each channel access priority, and the side link control information is wireless resource control information.

[0055] In some embodiments, before step S202, the method further includes: step S2004, receiving control information related to the second side link information sent by the base station.

[0056] In this embodiment, the control information may include at least one of the following: frequency domain configuration information of the second side link information; time domain information of the second side link information in a time slot; and side link resource pool information of the second side link information.

[0057] In some embodiments, before step S202, the method further includes: step S2006, receiving side link control information related to the second side link information sent by the base station.

[0058] In this embodiment, the side link control information includes at least one of the following: the frequency domain position of the second side link information within the frequency domain resource block set; at least one of the channel access priorities, and the frequency domain resources of the second side link information corresponding to each of the channel access priorities; at least one of the channel access priorities, and the time domain resources of the second side link information corresponding to each of the channel access priorities; at least one of the channel access priorities, and the time domain length of the second side link information corresponding to each of the channel access priorities; at least one of the channel access priorities, and the code domain resources of the second side link information corresponding to each of the channel access priorities.

[0059] In some embodiments, the second side link information may be a modulation symbol sequence.

[0060] In some embodiments, step S204 of sending the second side link information in the second time slot may include: sending the second side link information in a target time domain symbol in the second time slot.

[0061] In this embodiment, the second time slot includes multiple time domain symbols, and the target time domain symbol includes at least one of the following: the target time domain symbol includes the second to last time domain symbol in the second time slot; the target time domain symbol includes the second to last time domain symbol and the third to last time domain symbol in the second time slot; the target time domain symbol includes the second to last time domain symbol among the side link time domain symbols in the second time slot; the target time domain symbol includes the second to last time domain symbol and the third to last time domain symbol among the side link time domain symbols in the second time slot; the previous time domain symbol adjacent to the target time domain symbol only sends cyclic prefix extension information (CPE) or does not send any information; the next time domain symbol adjacent to the target time domain symbol only sends cyclic prefix extension information or does not send any information.

[0062] In an embodiment of the present application, the first side link information is not limited to the information transmission during the channel access process. The transmission type of the first side link information may include at least one of the following: side link synchronization signal block (Sidelink Synchronization Signal Block, referred to as S-SSB), physical side link feedback channel (Physical Sidelink Feedback Channel, referred to as PSFCH), physical side link shared channel (Physical Sidelink Shared Channel, referred to as PSSCH) and physical side link control channel (Physical Sidelink Control Channel, referred to as PSCCH).

[0063] Through the embodiments of the present application, the second side link information can be sent before the first side link information is sent, and other terminals can be notified in advance to avoid using time domain resources or time-frequency resources that may cause LBT congestion, thereby solving the problem in the related technology that it is difficult for user devices in different side link resource pools to avoid channel access process congestion, and achieving the technical effect of avoiding information transmission congestion.

[0064] Figure 3 is a schematic diagram of the terminal time-frequency resources in the channel access process in the related technology. As shown in Figure 3, due to the overlap of UE2's transmission and the time interval [t1, t2] during UE1's channel access process, UE1 may fail to perform the channel access process, that is, UE2's transmission blocks UE1's channel access process.

[0065] Through the embodiments of the present application, it is possible to avoid overlap of the time domain resources used for the information transmission of the second terminal and the channel access process of the first terminal, thereby achieving the technical effect of avoiding information transmission congestion.

[0066] In one embodiment of the present application, an information transmission method is also provided, which is applied to the second terminal. Figure 4 is a flowchart (two) of the information transmission method according to the embodiment of the present application. As shown in Figure 4, the process includes the following steps.

[0067] Step S401: receiving second side link information sent by a first terminal in a second time slot.

[0068] Step S402: Determine the channel access priority of the first side link information according to the second side link information, wherein the first side link information is the side link information sent by the first terminal after the second side link information.

[0069] Step S403: Determine a time domain area according to the channel access priority and the second time slot.

[0070] Step S404: determine one or more time-frequency resources based on the time domain area.

[0071] Step S405: Transmit third side link information on at least one time-frequency resource among the time-frequency resources.

[0072] In this embodiment, the time domain region of the first terminal does not overlap with the time-frequency resources of the second terminal. Exemplarily, during the resource selection process, the second terminal avoids selecting time-frequency resources that fall within the time domain region in step S403. Equivalently, when selecting a time-frequency resource from multiple candidate time-frequency resources, the second terminal selects a time-frequency resource from candidate time-frequency resources that does not overlap with the time domain region in step S403.

[0073] In an embodiment of the present application, through the above-mentioned steps S401 to S405, the second terminal can obtain the time domain area occupied by the first side link information to be subsequently sent by the first terminal based on the second side link information (such as the time interval during which the first terminal performs the channel access process) to determine the time and frequency resources for its own information transmission, thereby avoiding the second terminal from using time domain resources or time and frequency resources that may cause LBT congestion, thereby solving the problem in the related technology that it is difficult for user devices in different side link resource pools to avoid channel access process congestion, and achieving the technical effect of avoiding information transmission congestion.

[0074] In some embodiments, step S402 determines the channel access priority of the first side link information based on the second side link information, and may include at least one of the following: determining the channel access priority based on the frequency domain resources of the second side link information, wherein there is a mapping relationship between the channel access priority and the frequency domain resources of the second side link information; determining the channel access priority based on the time domain resources of the second side link information, wherein there is a mapping relationship between the channel access priority and the time domain resources of the second side link information; determining the channel access priority based on the time domain length of the second side link information, wherein there is a mapping relationship between the channel access priority and the time domain length of the second side link information; determining the channel access priority based on the code domain resources of the second side link information, wherein there is a mapping relationship between the channel access priority and the code domain resources of the second side link information.

[0075] In some embodiments, before determining a time domain area based on the channel access priority and the second time slot in step S403, the method further includes: step S400, receiving side link control information sent by the base station, wherein the side link control information carries at least one channel access priority and the number of time slots corresponding to each channel access priority, and the side link control information is wireless resource control signaling.

[0076] In some embodiments, step S403 determines a time domain area based on the channel access priority and the second time slot, and may include the following steps: step S4032, determining the number of time slots based on the channel access priority, wherein there is a mapping relationship between the channel access priority and the number of time slots; step S4036, determining a time domain area based on the number of time slots, wherein the number of time slots is the number of time slots contained in the time domain area.

[0077] In some embodiments, after determining the number of time slots according to the channel access priority in step S4032, the method further includes step S4034 of determining a first time slot of the first side link information. This may include: marking each time slot that is later than the second time slot and has an interval greater than or equal to N from the second time slot as a second target time slot, where N is the number of time slots and N is an integer greater than or equal to 0; and determining the second target time slot that has the earliest time domain, belongs to the first side link resource pool, and whose adjacent previous time slot belongs to the second link resource pool as the first time slot.

[0078] In some embodiments, step S4036 determines a time domain area according to the number of time slots, which may include: determining N consecutive time slots before the first time slot as the time domain area, where N is the number of time slots.

[0079] Through the embodiments of the present application, the second terminal can determine the time domain area occupied by the first side link information to be sent subsequently by the first terminal (such as the time interval for the first terminal to perform the channel access process) based on the second side link information, and determine the time and frequency resources for its own information transmission, thereby avoiding the second terminal from using time domain resources or time and frequency resources that may cause LBT congestion, thereby solving the problem in the related technology that it is difficult for user devices in different side link resource pools to avoid channel access process congestion, and achieving the technical effect of avoiding information transmission congestion.

[0080] Figure 5 is a schematic diagram of the time-frequency resources of the first side link information and the second side link information in one embodiment of the present application. As shown in Figure 5, the time-frequency resources used by the first side link information (represented in light gray) and the second side link information (represented in dark gray) are located in different side link resource pools.

[0081] In this embodiment, taking the number of time slots N=4 as an example, the first time slot and the second time slot are separated by at least 4 time slots.

[0082] In this embodiment, the first terminal sends the second side link information in the second time slot of the second side link resource pool. The first terminal sends the first side link information in the first time slot (slot m) of the first side link resource pool. The side link control information (SCI) corresponding to the second side link information includes an indication of the CAPC value of the first side link information.

[0083] In this embodiment, the first terminal determines the second time slot based on the predetermined first time slot and a first preset rule.

[0084] In an exemplary embodiment, the first preset rule includes: selecting, from a plurality of time slots included in the second side link resource pool, a time slot that is earlier than the first target time slot and closest in time domain to the first target time slot as the second time slot, wherein the Nth time slot before the first time slot is marked as the first target time slot.

[0085] In an exemplary embodiment, the first preset rule may also be expressed as: the second time slot is the latest time slot among the time slots included in the second side link resource pool among multiple time slots that are at least N time slots earlier than the first time slot.

[0086] In this embodiment, the number of time slots N can be any non-negative integer.

[0087] In this embodiment, the second terminal receives the second side link information in the second time slot, and determines, based on the second time slot and according to a second preset rule, a first time slot for the first terminal to send the first side link information.

[0088] In an exemplary embodiment, the second target time slot is: each time slot that is later than the second time slot and is at least N time slots away from the second time slot is marked as the second target time slot.

[0089] In an exemplary embodiment, the first time slot determined by the second preset rule is the earliest second target time slot in the time domain that meets the following conditions: it belongs to the first side link resource pool, and the time slot immediately before the second target time slot belongs to the second side link resource pool.

[0090] In this embodiment, as shown in FIG5 , the second terminal receives the second side link information, determines that the second target time slots include slot m and slot m+1, and then determines that the first time slot is slot m from the second target time slots.

[0091] In some embodiments of the present application, the first side link information corresponds to one of K CAPC values ​​(channel access priority). The SCI indicating the first side link information includes a CAPC value, which is one of the K CAPC values ​​and represents the CAPC value of the first side link information.

[0092] In this embodiment, the first terminal sends second side link information, and a mapping relationship is established between at least one of frequency domain resources, time domain resources, time domain length, and code domain resources of the second side link information and a CAPC value. The first terminal determines at least one of the frequency domain resources, time domain resources, time domain length, and code domain resources of the second side link information based on the mapping relationship and the CAPC value of the first side link information.

[0093] In an exemplary embodiment, the first side link information corresponds to one of K CAPC values, where the K CAPC values ​​each correspond to one of K frequency domain resources. The CAPC value corresponding to the first side link information is one of the K CAPC values, and the first terminal uses the frequency domain resource mapped to the CAPC value to send the second side link information.

[0094] In an exemplary embodiment, the first sidelink information corresponds to one of K CAPC values, and X of the K CAPC values ​​correspond to one of X frequency domain resources. The CAPC value corresponding to the first sidelink information is one of the K CAPC values. The X CAPC values ​​with the smallest CAPC values ​​correspond to one of the X frequency domain resources. The X CAPC values ​​are a subset of the K CAPC values, and are the X CAPC values ​​with the smallest CAPC values ​​among the K CAPC values. If a CAPC value corresponding to the first sidelink information is one of the X CAPC values, the first terminal transmits the second sidelink information and transmits the second sidelink information using the frequency domain resource mapped by the CAPC value. If a CAPC value corresponding to the first sidelink information is not one of the X CAPC values, the first terminal does not transmit the second sidelink information.

[0095] In a special case, X may be equal to K.

[0096] In an exemplary embodiment, the first side link information corresponds to one of K CAPC values, where each of the K CAPC values ​​corresponds to one of K time lengths. The CAPC value corresponding to the first side link information of the first terminal is one of the K CAPC values, and the first terminal sends the second side link information using the time length mapped to the CAPC value.

[0097] In an exemplary embodiment, the first side link information corresponds to one of K CAPC values, and X of the K CAPC values ​​correspond to one of X time lengths. The CAPC value corresponding to the first side link information is one of the K CAPC values. The X CAPC values ​​with the smallest CAPC values ​​correspond to one of the X time lengths. The X CAPC values ​​are a subset of the K CAPC values, and are the X CAPC values ​​with the smallest CAPC values ​​among the K CAPC values. If a CAPC value corresponding to the first side link information is one of the X CAPC values, the first terminal transmits the second side link information, and transmits the second side link information using the time length mapped by the CAPC value. If a CAPC value corresponding to the first side link information is not one of the X CAPC values, the first terminal does not transmit the second side link information.

[0098] In a special case, X may be equal to K.

[0099] In some embodiments of the present application, corresponding frequency domain / time domain / code domain resources may be configured for each CAPC value through high-layer signaling (such as RRC signaling).

[0100] In an exemplary embodiment, RRC signaling carries L CAPC values ​​and at least one of the frequency domain resources, time domain resources, time domain length, and code domain resources corresponding to each CAPC value. The frequency domain resources, time domain resources, time domain length, and code domain resources herein are configuration parameters for the second side link information. The first terminal determines at least one of the frequency domain resources, time domain resources, time domain length, and code domain resources for the second side link information based on the configuration parameters in the RRC signaling.

[0101] In an exemplary embodiment, the CAPC value of the first side link information is one of the L CAPCs. The first terminal determines the frequency domain resources of the second side link information according to the frequency domain resources configured for the CAPC value by RRC signaling.

[0102] In some embodiments of the present application, the second side link resource pool may be configured through higher layer signaling (such as RRC signaling).

[0103] In this embodiment, the first terminal sends the first side link information in the first side link resource pool and sends the second side link information in the second side link resource pool.

[0104] In an exemplary embodiment, the RRC signaling includes configuration information of the first SL resource pool, which is a dedicated side link resource pool for sending a positioning reference signal (PRS). The terminal can send PRS in the first SL resource pool, and send SCI for indicating PRS.

[0105] In an exemplary embodiment, the RRC signaling includes configuration information of the second SL resource pool, and the second SL resource pool is a side link resource pool for sending PSSCH or a shared resource pool for SL PRS and PSSCH. When the second SL resource pool is a SL resource pool for sending PSSCH, the terminal can send PSCCH and PSSCH in the SL resource pool. When the second SL resource pool is a shared SL resource pool for sending SL PRS and PSSCH, the terminal can send PSCCH, PSSCH and SL PRS in the SL resource pool.

[0106] In an exemplary embodiment, the first SL resource pool includes an index of the second SL resource pool. The first terminal sends the first side link information in the first SL resource pool, determines a second SL resource pool for sending the second side link information based on the index of the second SL resource pool included in the first SL resource pool, and sends the second side link information in the SL resource pool corresponding to the index.

[0107] In an exemplary embodiment, the first SL resource pool is an SL resource pool for transmitting PSSCH or a shared SL resource pool for SL PRS and PSSCH, and the second SL resource pool is a dedicated SL resource pool for transmitting SL PRS. The process of the first terminal determining the second SL resource pool is the same as described above and will not be repeated here.

[0108] In some embodiments of the present application, multiple CAPC values ​​and the time-frequency resources corresponding to each CAPC value may be configured through higher layer signaling (such as RRC signaling).

[0109] In an exemplary embodiment, RRC signaling includes: multiple CAPC values, and the time-frequency resources corresponding to each CAPC value. Y different first terminals respectively transmit first side link information and second side link information. When the Y first side link information correspond to the same CAPC value, within a resource block set, the Y first terminals determine the same frequency domain resources for their respective second side link information. Furthermore, these Y second side link information are the same side link information, that is, the content and format of the transmitted information are the same.

[0110] In an exemplary embodiment, RRC signaling includes multiple CAPC values ​​and a corresponding time length for each CAPC value. For first sidelink information with the same CAPC value, the corresponding second sidelink information has the same time length. Furthermore, these second sidelink information are identical, meaning that the content and format of the information being sent are identical.

[0111] In an exemplary embodiment, RRC signaling includes: multiple CAPC values, and the code domain sequence or code domain cyclic shift corresponding to each CAPC value. For first side link information with the same CAPC value, the corresponding second side link information has the same code domain sequence and code domain cyclic shift. Furthermore, these second side link information are identical, meaning that the content and format of the transmitted information are identical.

[0112] In some embodiments of the present application, a channel can be defined as a frequency domain resource with a bandwidth of typically 20 MHz and belonging to an unlicensed spectrum. In the unlicensed spectrum, a communication node performs a channel access procedure for one or more channels and can only transmit information on the channel(s) if the channel(s) are assessed to be available.

[0113] In the embodiment of the present application, a channel may include several resource blocks that can be used for information transmission, which are called a resource block set (RB set). In addition to the resource block set, a channel may also include other resource blocks used to protect bandwidth.

[0114] In an embodiment of the present application, an SL resource pool includes several time-frequency resources, including several frequency domain resources in the frequency domain and several time domain units in the time domain. Exemplarily, each time domain unit is a time slot.

[0115] In an exemplary embodiment, the time-frequency resources included in an SL resource pool are time-frequency resources that can be used for side link communication (or time-frequency resources that can be used for PSSCH transmission).

[0116] In an exemplary embodiment, one SL resource pool may include multiple resource block sets in the frequency domain.

[0117] Figure 6 is a schematic diagram of the structure of the second side link information in a time slot in an embodiment of the present application (I). As shown in Figure 6, each time slot includes multiple time domain symbols. In a time slot, the time domain symbol used to send the second side link information is marked as the target time domain symbol.

[0118] In this embodiment, the time slot of the second side link information (the second time slot) is a time slot included in the time domain of the second SL resource pool. The second SL resource pool is a shared SL resource pool of SL PRS and PSSCH, or a PSSCH resource pool.

[0119] In this embodiment, the first time domain symbol of the time slot is a duplicate time domain symbol. Within a certain frequency domain range, this time domain symbol is a duplicate of another time domain symbol. The duplicate time domain symbol is followed by two or three PSCCH time domain symbols. The time domain symbol of the second side link information is marked as the target time domain symbol. The time domain symbol immediately following the target time domain symbol is not used to transmit any information other than the CPE. The time domain symbol immediately preceding the target time domain symbol is not used to transmit any information other than the CPE. The time domain symbols preceding this time domain symbol include the PSSCH time domain symbol.

[0120] In this embodiment, the target time domain symbol includes at least one of the following features: the target time domain symbol includes the penultimate time domain symbol in a time slot, or includes the penultimate and penultimate time domain symbols in a time slot; the target time domain symbol includes the penultimate time domain symbol among the SL time domain symbols in a time slot, or includes the penultimate and penultimate time domain symbols in a time slot; the time domain symbol immediately following the target time domain symbol is not used to send any SL information other than the CPE, that is, the time domain symbol can be empty, or used to send cyclic prefix extension information; the time domain symbol immediately preceding the target time domain symbol is not used to send any SL information other than the CPE, that is, the time domain symbol can be empty, or used to send cyclic prefix extension information.

[0121] Figure 7 is a schematic diagram of the structure of the second side link information in a time slot in one embodiment of the present application (II). As shown in Figure 7, each time slot includes multiple time domain symbols. In a time slot, the time domain symbol used to send the second side link information is marked as the target time domain symbol.

[0122] In this embodiment, the time slot of the second side link information (the second time slot) is a time slot included in the time domain of the second SL resource pool. The second SL resource pool is a SL PRS dedicated resource pool.

[0123] In this embodiment, the first time domain symbol of the time slot is a duplicate time domain symbol, and within a certain frequency domain range, the time domain symbol is a duplicate of another time domain symbol. Following the duplicate time domain symbol, there are 2 or 3 PSCCH time domain symbols. The time domain symbol of the second side link information is marked as the target time domain symbol. The time domain symbol immediately following the target time domain symbol is not used to send any side link information other than the CPE, and the time domain symbol immediately preceding the target time domain symbol is not used to send any side link information other than the CPE. Several time domain symbols preceding the time domain symbol immediately preceding the target time domain symbol include the time domain symbol of the SL PRS.

[0124] In this embodiment, the target time domain symbol includes at least one of the following features: the target time domain symbol includes the penultimate time domain symbol in a time slot, or includes the penultimate and penultimate time domain symbols in a time slot; the target time domain symbol includes the penultimate time domain symbol among the SL time domain symbols in a time slot, or includes the penultimate and penultimate time domain symbols in a time slot; the time domain symbol immediately following the target time domain symbol is not used to send any SL information other than the CPE, that is, the time domain symbol can be empty, or used to send cyclic prefix extension information; the time domain symbol immediately preceding the target time domain symbol is not used to send any SL information other than the CPE, that is, the time domain symbol can be empty, or used to send cyclic prefix extension information.

[0125] The embodiment of the present application further provides a terminal for transmitting information according to the steps in any of the above method embodiments. The terminal can serve as the first terminal or the second terminal in the above embodiment.

[0126] In some embodiments, the terminal may be a mobile terminal or a vehicle-mounted terminal in V2X communication, which is not limited in this application.

[0127] An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above method embodiments are executed.

[0128] In an exemplary embodiment, the computer-readable storage medium may include, but is not limited to, various media that can store computer programs, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk, or an optical disk.

[0129] An embodiment of the present application further provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0130] In an exemplary embodiment, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0131] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of any of the above-mentioned method embodiments and can achieve the same technical effects. To avoid repetition, it will not be described here.

[0132] The examples in this embodiment can refer to the examples described in the above embodiments and exemplary implementation modes, and this embodiment will not be described in detail here.

[0133] Obviously, those skilled in the art should understand that the modules or steps of the present application described above can be implemented using a general-purpose computing device, they can be concentrated on a single computing device, or distributed across a network composed of multiple computing devices, they can be implemented using program code executable by the computing device, and thus, they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be performed in a different order than herein, or they can be fabricated into separate integrated circuit modules, or multiple modules or steps can be fabricated into a single integrated circuit module for implementation. Thus, the present application is not limited to any specific combination of hardware and software.

[0134] The above description is merely an embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An information transmission method, applied to a first terminal, the method comprising: Determine a second time slot according to the channel access priority of the first side link information and the first time slot, wherein the second time slot is before the first time slot, the first time slot is located in the first side link resource pool, and the second time slot is located in the second side link resource pool; Sending second side link information in the second time slot, wherein the second side link information is used to indicate the channel access priority, the channel access priority is used for the second terminal to determine a time domain area, the second terminal determines one or more time-frequency resources based on the time domain area, and at least one of the one or more time-frequency resources is used for the second terminal to transmit third side link information; The first side link information is sent in the first time slot.

2. The method according to claim 1, wherein: The method further includes: determining resources of the second side link information within a time slot.

3. The method according to claim 2, wherein: Determining a resource of the second side link information in a time slot includes at least one of the following: Determine the frequency domain resource of the second side link information according to the channel access priority; Determine the time domain resource of the second side link information according to the channel access priority; Determine the time domain length of the second side link information according to the channel access priority; The code domain resource of the second side link information is determined according to the channel access priority.

4. The method according to claim 1, wherein: The first side link resource pool and the second side link resource pool are side link resource pools of different types.

5. The method according to claim 4, wherein: The first side link resource pool is a dedicated resource pool for side link positioning reference signals, and the second side link resource pool is a shared resource pool for side link positioning reference signals and physical side link shared channels or a physical side link shared channel resource pool; Alternatively, the first side link resource pool is a shared resource pool of the side link positioning reference signal and a physical side link shared channel or a physical side link shared channel resource pool, and the second side link resource pool is a dedicated resource pool for the side link positioning reference signal.

6. The method according to claim 1, wherein: in, The frequency domain resources of the first side link information include a plurality of first resource blocks, wherein the first resource blocks belong to a first frequency domain set; The frequency domain resources of the second side link resource pool include a second frequency domain set; The first frequency domain set and the second frequency domain set include at least one resource block set, each of the resource block sets includes a plurality of continuous resource blocks, and the intersection of different resource block sets is empty.

7. The method according to claim 6, wherein: The method further includes: determining the frequency domain resource of the second side link information, including: Marking an intersection of the first frequency domain set and the second frequency domain set as a third frequency domain set; At least one third resource block in the third frequency domain set is used as a frequency domain resource for the second side link information.

8. The method according to claim 1, wherein: Determining a second time slot according to the channel access priority of the first side link information and the first time slot includes: Determine the number of time slots N according to the channel access priority, wherein there is a mapping relationship between the channel access priority and the number of time slots N, wherein N is greater than or equal to 0; A time slot in the second side link resource pool that is earlier than the first target time slot and closest to the first target time slot is determined as the second time slot, wherein the first target time slot is the Nth time slot before the first time slot.

9. The method according to claim 1, wherein: Before determining the second time slot according to the channel access priority of the first side link information and the first time slot, the method further includes: Receive side link control information sent by a base station, wherein the side link control information carries at least one channel access priority and the number of time slots corresponding to each channel access priority, and the side link control information is wireless resource control information.

10. The method according to claim 1, wherein: Before determining the second time slot according to the channel access priority of the first side link information and the first time slot, the method further includes: Receive control information related to the second side link information sent by a base station, wherein the control information includes at least one of the following: Frequency domain configuration information of the second side link information; Time domain information of the second side link information in a time slot; The side link resource pool information of the second side link information.

11. The method according to claim 1, wherein: Before determining the second time slot according to the channel access priority of the first side link information and the first time slot, the method further includes: Receive side link control information related to the second side link information sent by a base station, wherein the side link control information includes at least one of the following: The frequency domain position of the second side link information within the frequency domain resource block set; at least one of the channel access priorities, and frequency domain resources of the second side link information corresponding to each of the channel access priorities; at least one of the channel access priorities, and a time domain resource of the second side link information corresponding to each of the channel access priorities; at least one of the channel access priorities, and a time domain length of the second side link information corresponding to each of the channel access priorities; At least one of the channel access priorities, and code domain resources of the second side link information corresponding to each of the channel access priorities.

12. The method according to claim 1, wherein: Sending second side link information in the second time slot includes: The second side link information is sent in a target time domain symbol within the second time slot, wherein the second time slot includes a plurality of time domain symbols, and the target time domain symbol includes at least one of the following: The target time domain symbol includes the second to last time domain symbol in the second time slot; The target time domain symbol includes the second to last time domain symbol and the third to last time domain symbol in the second time slot; The target time domain symbol comprises the second to last time domain symbol among the side link time domain symbols in the second time slot; The target time domain symbol includes the second to last time domain symbol and the third to last time domain symbol among the side link time domain symbols in the second time slot; A previous time domain symbol adjacent to the target time domain symbol only sends cyclic prefix extension information or does not send any information; A subsequent time domain symbol adjacent to the target time domain symbol only sends cyclic prefix extension information or does not send any information.

13. An information transmission method, applied to a second terminal, the method comprising: Receiving second side link information sent by the first terminal in the second time slot; Determining a channel access priority of the first side link information according to the second side link information, wherein the first side link information is side link information sent by the first terminal after the second side link information; Determine a time domain area according to the channel access priority and the second time slot; Determine one or more time-frequency resources based on the time domain area; The third side link information is transmitted on at least one time-frequency resource among the time-frequency resources.

14. The method according to claim 13, wherein: Determining the channel access priority of the first side link information according to the second side link information includes at least one of the following: Determine the channel access priority according to the frequency domain resources of the second side link information, wherein there is a mapping relationship between the channel access priority and the frequency domain resources of the second side link information; Determine the channel access priority according to the time domain resources of the second side link information, wherein there is a mapping relationship between the channel access priority and the time domain resources of the second side link information; Determining the channel access priority according to the time domain length of the second side link information, wherein there is a mapping relationship between the channel access priority and the time domain length of the second side link information; The channel access priority is determined according to the code domain resources of the second side link information, wherein there is a mapping relationship between the channel access priority and the code domain resources of the second side link information.

15. The method according to claim 13, wherein: Before determining a time domain area according to the channel access priority and the second time slot, the method further includes: Receive side link control information sent by a base station, wherein the side link control information carries at least one channel access priority and the number of time slots corresponding to each channel access priority, and the side link control information is wireless resource control signaling.

16. The method according to claim 13, wherein: Determining a time domain area according to the channel access priority and the second time slot includes: Determine the number of time slots according to the channel access priority, wherein there is a mapping relationship between the channel access priority and the number of time slots; One of the time domain regions is determined according to the number of time slots, wherein the number of time slots is the number of time slots included in the time domain region.

17. The method according to claim 16, wherein: After determining the number of time slots according to the channel access priority, the method further includes: Marking each time slot later than the second time slot and having an interval greater than or equal to N from the second time slot as a second target time slot, where N is the number of time slots and N is greater than or equal to 0; A second target time slot which is the earliest in the time domain, belongs to the first side link resource pool, and the adjacent previous time slot belongs to the second link resource pool is determined as the first time slot.

18. The method according to claim 17, wherein: Determining one of the time domain areas according to the number of time slots includes: The N consecutive time slots before the first time slot are determined as the time domain area, where N is the number of time slots.

19. A terminal, used for transmitting information according to the method described in any one of claims 1 to 12.

20. A terminal, used for transmitting information according to the method described in any one of claims 13 to 18.

21. A computer-readable storage medium, wherein a computer program is stored in the storage medium, wherein: When the computer program is executed by a processor, the method described in any one of claims 1 to 12 or 13 to 18 is executed.

22. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to perform the method according to any one of claims 1 to 12 or 13 to 18.

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