Information transmission method and terminal

Abstract

The embodiment of the invention provides an information transmission method and a terminal. The method comprises the following steps: determining a second time slot according to a channel access priority of first sidelink information and a first time slot; second sidelink information is sent in a second time slot, the second sidelink information is used for indicating a channel access priority, the channel access priority is used for a second terminal to determine a time domain region, and the second terminal determines one or more time-frequency resources based on the time domain region, at least one of the one or more time-frequency resources is used for the second terminal to transmit the third side link information; according to the embodiment of the invention, other terminals can be notified in advance to prevent the terminals from using time domain resources or time frequency resources which can cause LBT (Listen Before Talk) blockage, so that the problem that user equipment in different sidelink resource pools is difficult to avoid channel access process blockage in related technologies is solved; the technical effect of avoiding information transmission blocking is achieved.

Description

Technical Field

[0001] This application relates to the field of communications, and in particular, to an information transmission method and a terminal. Background Art

[0002] In a Sidelink (SL) communication system, when there is a service to be transmitted between User Equipments (UEs), the service between UEs does not pass through the network side, that is, it does not pass through the forwarding of the cellular link between the UE and the base station. Instead, the data source UE directly transmits it to the target UE through the Sidelink. This direct communication mode between UEs has obvious characteristics 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 who can apply Sidelink communication, Sidelink communication not only saves wireless spectrum resources, but also reduces the data transmission pressure on the core network, can reduce system resource occupancy, increase the spectrum efficiency of the cellular communication system, reduce communication latency, and greatly save network operation 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 for sending signaling / data within the SL resource pool.

[0003] On unlicensed spectrum, before a communication device uses time-frequency resources, it needs to perform a channel access process. The channel access process is used to determine whether the channel is available (or whether the channel is idle). A communication device can perform the channel access process on one or more channels to determine whether the channel is available. Here, a channel refers to a carrier or a part of a carrier composed of a group of consecutive Resource Blocks (RBs). The frequency-domain resources corresponding to a channel here belong to shared spectrum. The channel access process can also be referred to as a Listen Before Talk (LBT) process. The first communication device determines whether the channel is occupied through the 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 this channel for transmission and no LBT failure occurs (i.e., LBT is successful).

[0004] Figure 3It is a schematic diagram of the time-frequency resources of a terminal in the channel access process in the related art. When sidelink communication is applied on unlicensed spectrum, such as Figure 3 As shown, although the time-frequency resources of UE1 and UE2 are orthogonal, UE2 will still affect the transmission of the sidelink information of UE1. On unlicensed spectrum, the time interval for UE1 to perform the channel access process is [t1, t2]. The overlap between the transmission of UE2 and the time interval [t1, t2] for UE1 to perform the channel access process will cause the channel access of UE1 to fail, that is, UE1 judges that the channel is unavailable, so UE1 is not allowed to send sidelink information on the time-frequency resources of slot n+3 in Figure 3 . More specifically, for the availability evaluation of a channel, UE1 judges whether the channel is available based on one or more times of judging whether the received energy on the channel exceeds a threshold. When the transmission of UE2 overlaps with the time interval [t1, t2] for UE1 to perform the channel access process, the received energy of UE1 on this channel includes the energy of UE2, so it is easy to make the received energy of UE1 on this channel exceed the threshold, resulting in the failure of UE1's channel access, and thus causing UE1 to be unable to send sidelink information. Since the transmission of UE2 overlaps with the time interval [t1, t2] for UE1 to perform the channel access process, resulting in the failure of UE1 to perform the channel access process, it is called that the transmission of UE2 blocks the channel access process of UE1, or it is called that the transmission of UE2 blocks the Listen Before Talk (LBT) process of UE1.

[0005] In the sidelink, the 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 does not receive communication information for the SL resource pool where UE1 is located, so UE2 cannot realize that it causes LBT blocking to UE1, so it is difficult to avoid UE2 causing LBT blocking to UE1.

[0006] In summary, there is no good solution to the above problems. SUMMARY OF THE INVENTION

[0007] Embodiments of the present application provide an information transmission method and a terminal, so as to at least solve the problem that it is difficult for user equipment in different sidelink resource pools in the related art to avoid blocking in the channel access process.

[0008] According to an embodiment of the present application, an information transmission method is provided, which is applied to a first terminal. The method includes: determining a second time slot according to the channel access priority of the first sidelink information and a first time slot, where the second time slot is before the first time slot, the first time slot is located in a first sidelink resource pool, and the second time slot is located in a second sidelink resource pool; sending second sidelink information in the second time slot, where the second sidelink information is used to indicate the channel access priority, and the channel access priority is used for a second terminal to determine a time domain region, and the second terminal determines one or more time-frequency resources based on the time domain region, and at least one of the one or more time-frequency resources is used for the second terminal to transmit third sidelink information; sending the first sidelink information in the first time slot.

[0009] According to an embodiment of the present application, an information transmission method is provided, which is applied to a second terminal. The method includes: receiving the second sidelink information sent by the first terminal in the second time slot; determining the channel access priority of the first sidelink information according to the second sidelink information, where the first sidelink information is the sidelink information sent by the first terminal after the second sidelink information; determining a time domain region according to the channel access priority and the second time slot; determining one or more time-frequency resources based on the time domain region; transmitting third sidelink information on at least one of the time-frequency resources.

[0010] According to another embodiment of the present application, a terminal is provided for performing information transmission according to the steps in any of the above method embodiments.

[0011] According to still another embodiment of the present application, a computer-readable storage medium is further provided. A computer program is stored in the storage medium. When the computer program is run by a processor, the steps in any of the above method embodiments are executed.

[0012] According to still another embodiment of the present application, an electronic device is further provided, including a memory and a processor. A computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any of the above method embodiments.

[0013] Through the embodiments of the present application, the second sidelink information is sent in advance before the first sidelink information is sent, which can notify other terminals in advance to avoid using the time domain resources or time-frequency resources that will cause LBT blocking, thereby solving the problem that it is difficult for user equipment in different sidelink resource pools to avoid blocking in the channel access process in the related art, and achieving the technical effect of avoiding information transmission blocking. Description of the Drawings

[0014] Figure 1It is a hardware block diagram of the information transmission method according to an embodiment of the present application;

[0015] Figure 2 It is a flowchart (I) of the information transmission method according to an embodiment of the present application;

[0016] Figure 3 It is a schematic diagram of the time-frequency resources of a terminal in the channel access process in the related art;

[0017] Figure 4 It is a flowchart (II) of the information transmission method according to an embodiment of the present application;

[0018] Figure 5 It is a schematic diagram of the time-frequency resources of the first sidelink information and the second sidelink information in an embodiment of the present application;

[0019] Figure 6 It is a schematic diagram (I) of the structure of the second sidelink information within a time slot in an embodiment of the present application;

[0020] Figure 7 It is a schematic diagram (II) of the structure of the second sidelink information within a time slot in an embodiment of the present application. Detailed implementation manners

[0021] In the following, embodiments of the present application will be described in detail with reference to the accompanying drawings and in combination with embodiments.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence.

[0023] The method embodiments provided in the embodiments of the present application can be executed on a mobile terminal, a computer terminal or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 It is a hardware block diagram of the information transmission method according to an embodiment of the present application, as Figure 1 shown, the hardware single board may include one or more ( Figure 1 only one is shown in Figure 1 a processor 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. Among them, the above-mentioned mobile terminal may further include a transmission device 16 for communication functions and an input / output device 18. Those of ordinary skill in the art can understand that, Figure 1 the structure shown in Figure 1 is only schematic, and it does not limit the structure of the above-mentioned mobile terminal. For example, the mobile terminal may further include more or fewer components than

[0024] 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 embodiments of the present application. The processor 12 executes various functional applications and the information transmission method by running the computer program stored in the memory 14, that is, the above-mentioned method is implemented. 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 memories, or other non-volatile solid-state memories. In some instances, the memory 14 may further include a memory remotely disposed relative to the processor 12, and these remote memories can be connected to the mobile terminal through a network. Examples of the above network include but are not limited to the Internet, intranet, local area network, mobile communication network, and combinations thereof.

[0025] The transmission device 16 is used to receive or send data via a network. Specific examples of the above network may include a wireless network provided by a communication provider. In one instance, the transmission device 16 includes a network adapter (Network Interface Controller, abbreviated as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one instance, the transmission device 16 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0026] In an embodiment of the present application, an information transmission method is provided, which is applied to a first terminal. Figure 2 It is a flowchart (one) of the information transmission method according to the embodiments of the present application, as Figure 2 shown, and the process includes the following steps:

[0027] Step S202, determine a second time slot according to the channel access priority of the first side link information and the first time slot, where the second time slot is before the first time slot, the first time slot is located in a first side link resource pool, and the second time slot is located in a second side link resource pool;

[0028] Step S204, send second side link information in the second time slot, where the second side link information is used to indicate the channel access priority, and the channel access priority is used for a second terminal to determine a time domain region, and the second terminal determines one or more time-frequency resources based on the time domain region, and at least one of the one or more time-frequency resources is used for the second terminal to transmit third side link information;

[0029] Step S206, send the first side link information in the first time slot.

[0030] In this embodiment, the Channel Access Priority Class (CAPC) is used to enable a second terminal that receives the second sidelink information to avoid using time domain resources or time-frequency resources that cause LBT blocking for the transmission of the first sidelink information of the first terminal. The time domain region determined by the second terminal can be used for the channel access process of the first terminal. 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 blocking in the channel access process.

[0031] In this embodiment, there may be one or more second terminals. All second terminals that receive the second sidelink information will avoid using time domain resources or time-frequency resources that cause LBT blocking.

[0032] In the embodiment of the present application, through the above steps S202 to S206, the second sidelink information is sent before the first sidelink information is sent, and other terminals are notified in advance to avoid using time domain resources or time-frequency resources that cause LBT blocking, thereby solving the problem that it is difficult for user equipment in different sidelink resource pools to avoid blocking in the channel access process in the related art, and achieving the technical effect of avoiding information transmission blocking.

[0033] In some embodiments, the method further includes step S201 of determining the resources of the second sidelink information within a time slot. This step can be performed before, after, or simultaneously with step S202, and the present application does not limit this.

[0034] In some embodiments, the resources of the second sidelink information within a time slot may include any one or a combination of the frequency domain resources, time domain resources, time domain length, and code domain resources of the second sidelink information.

[0035] In some embodiments, step S201 may include at least one of the following:

[0036] Step S2012 of determining the frequency domain resources of the second sidelink information according to the channel access priority;

[0037] Step S2014 of determining the time domain resources of the second sidelink information according to the channel access priority;

[0038] Step S2016 of determining the time domain length of the second sidelink information according to the channel access priority;

[0039] Step S2018 of determining the code domain resources of the second sidelink information according to the channel access priority.

[0040] 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 looked up.

[0041] In some embodiments, the first sidelink resource pool and the second sidelink resource pool are different types of sidelink resource pools.

[0042] In an exemplary embodiment, the first sidelink resource pool is a dedicated resource pool for sidelink positioning reference signals, and the second sidelink resource pool is a shared resource pool for sidelink positioning reference signals and physical sidelink shared channels or a physical sidelink shared channel resource pool.

[0043] In another exemplary embodiment, the first sidelink resource pool is a shared resource pool for sidelink positioning reference signals and physical sidelink shared channels or a physical sidelink shared channel resource pool, and the second sidelink resource pool is a dedicated resource pool for sidelink positioning reference signals.

[0044] In some embodiments, the frequency domain resources of the first sidelink information include multiple first resource blocks, where the first resource blocks belong to a first frequency domain set; the frequency domain resources of the second sidelink resource pool include a second frequency domain set; where 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.

[0045] In some embodiments, the method may further include: step S2010, determining the frequency domain resources of the second sidelink information.

[0046] In this embodiment, step S2010 may specifically include: marking the intersection of the first frequency domain set and the second frequency domain set as a third frequency domain set; using at least one third resource block in the third frequency domain set as the frequency domain resources of the second sidelink information.

[0047] In an exemplary embodiment, the third frequency domain set (including at least one resource block set) for the first terminal to send the second sidelink information is the overlap of the following two: the resource block set included in the second sidelink 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 sidelink information belongs (i.e., the first frequency domain set).

[0048] In an exemplary embodiment, the first terminal may send the second sidelink information in each resource block set in the third frequency domain set respectively, and the second sidelink information transmitted on different resource block sets is the same.

[0049] In an exemplary embodiment, when the first terminal sends second sidelink information in a resource block set, the second sidelink information only occupies one or more resource blocks in the resource block set.

[0050] In some embodiments, step S202 of determining the second time slot according to the channel access priority of the first sidelink information and the first time slot may include the following steps:

[0051] Step S2022, determining the number of time slots N according to the channel access priority, where there is a mapping relationship between the channel access priority and the number of time slots N, and N is greater than or equal to 0;

[0052] Step S2024, determining the second time slot as the time slot in the second sidelink resource pool that is earlier than the first target time slot and closest to the first target time slot, where the first target time slot is the Nth time slot before the first time slot.

[0053] In this embodiment, there is a mapping relationship between the channel access priority and the number of time slots. Usually, the values of the number of time slots corresponding to different channel access priorities are different.

[0054] In some embodiments, the channel access priority is equivalent to the number of time slots. The second sidelink information can be used to indicate the channel access priority corresponding to the first sidelink information. Similarly, the second sidelink information can also be used to indicate the number of time slots N corresponding to the first sidelink information. There are at least N time slots between the first time slot and the second time slot. N is a non-negative integer.

[0055] In some embodiments, the number of time slots N can also be configured by radio resource control (RRC) signaling, or the number of time slots N can also be a pre-configured value.

[0056] In some embodiments, before step S202, the method further includes: step S2002, receiving sidelink control information (SCI) sent by the base station, where the sidelink control information carries at least one channel access priority and the number of time slots corresponding to each channel access priority, and the sidelink control information is radio resource control information.

[0057] In some embodiments, before step S202, the method further includes: step S2004, receiving control information related to the second sidelink information sent by the base station.

[0058] In this embodiment, the control information may include at least one of the following: frequency domain configuration information of the second sidelink information; time domain information of the second sidelink information within one time slot; sidelink resource pool information of the second sidelink information.

[0059] In some embodiments, before step S202, the method further includes: step S2006, receiving sidelink control information related to the second sidelink information sent by the base station.

[0060] In this embodiment, the sidelink control information includes at least one of the following: frequency domain position of the second sidelink information within a set of frequency domain resource blocks; at least one of the channel access priorities, and the frequency domain resources of the second sidelink 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 sidelink 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 sidelink 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 sidelink information corresponding to each of the channel access priorities.

[0061] In some embodiments, the second sidelink information may be a modulation symbol sequence.

[0062] In some embodiments, step S204 of sending the second sidelink information in the second time slot may include: sending the second sidelink information in a target time domain symbol within the second time slot.

[0063] In this embodiment, 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 penultimate time domain symbol within the second time slot; the target time domain symbol includes the penultimate time domain symbol and the antepenultimate time domain symbol within the second time slot; the target time domain symbol includes the penultimate time domain symbol among the sidelink time domain symbols within the second time slot; the target time domain symbol includes the penultimate time domain symbol and the antepenultimate time domain symbol among the sidelink time domain symbols within the second time slot; the previous time domain symbol adjacent to the target time domain symbol only sends cyclic prefix extension information (Cyclic Prefix Extension, abbreviated as 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.

[0064] In the embodiments of the present application, the first sidelink information is not limited to information transmission during the channel access process. The transmission types of the first sidelink information may include at least one of the following: sidelink synchronization signal block (S-SSB for short), physical sidelink feedback channel (PSFCH for short), physical sidelink shared channel (PSSCH for short), and physical sidelink control channel (PSCCH for short).

[0065] Through the embodiments of the present application, the second sidelink information can be sent before the first sidelink information to notify other terminals in advance to avoid using time domain resources or time-frequency resources that will cause LBT blocking, thereby solving the problem that it is difficult for user equipment in different sidelink resource pools to avoid blocking during the channel access process in the related art, and achieving the technical effect of avoiding information transmission blocking.

[0066] Figure 3 It is a schematic diagram of the time-frequency resources of a terminal during the channel access process in the related art, as Figure 3 shown. Due to the overlap between the transmission of UE2 and the time interval [t1, t2] when UE1 performs the channel access process, it may cause the failure of UE1 to perform the channel access process, that is, the transmission of UE2 blocks the channel access process of UE1.

[0067] Through the embodiments of the present application, it is possible to avoid the coincidence of the information transmission of the second terminal and the time domain resources used by the channel access process of the first terminal, achieving the technical effect of avoiding information transmission blocking.

[0068] In an embodiment of the present application, an information transmission method is further provided, which is applied to a second terminal. Figure 4 It is a flowchart (two) of the information transmission method according to the embodiments of the present application, as Figure 4 shown. The process includes the following steps:

[0069] Step S401: Receive the second sidelink information sent by the first terminal in the second time slot;

[0070] Step S402: Determine the channel access priority of the first sidelink information according to the second sidelink information, where the first sidelink information is the sidelink information sent by the first terminal after the second sidelink information;

[0071] Step S403: Determine a time domain region according to the channel access priority and the second time slot;

[0072] Step S404: Determine one or more time-frequency resources based on the time domain region;

[0073] Step S405: Transmit third sidelink information on at least one of the time-frequency resources.

[0074] 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 will avoid selecting time-frequency resources that fall into the time domain region in step S403. Equivalently, when the second terminal selects time-frequency resources from multiple candidate time-frequency resources, it will select time-frequency resources from candidate time-frequency resources that do not overlap with the time domain region in step S403.

[0075] In the embodiments of this application, through the above steps S401 to S405, the second terminal can determine the time-frequency resources for its own information transmission based on the time domain region (such as the time interval during which the first terminal performs the channel access process) occupied by the first sidelink information to be sent by the first terminal subsequently based on the second sidelink information, avoiding the time domain resources or time-frequency resources that will cause LBT blocking for the second terminal, thereby solving the problem in the related art that it is difficult for user equipment in different sidelink resource pools to avoid channel access process blocking, and achieving the technical effect of avoiding information transmission blocking.

[0076] In some embodiments, step S402 of determining the channel access priority of the first sidelink information according to the second sidelink information may include at least one of the following:

[0077] Determine the channel access priority according to the frequency domain resources of the second sidelink information, where there is a mapping relationship between the channel access priority and the frequency domain resources of the second sidelink information;

[0078] Determine the channel access priority according to the time domain resources of the second sidelink information, where there is a mapping relationship between the channel access priority and the time domain resources of the second sidelink information;

[0079] Determine the channel access priority according to the time domain length of the second sidelink information, where there is a mapping relationship between the channel access priority and the time domain length of the second sidelink information;

[0080] Determine the channel access priority according to the code domain resources of the second sidelink information, where there is a mapping relationship between the channel access priority and the code domain resources of the second sidelink information.

[0081] In some embodiments, before determining a time domain region according to the channel access priority and the second time slot in step S403, the method further includes:

[0082] Step S400: Receive sidelink control information sent by a base station, where the sidelink control information carries at least one channel access priority and the number of time slots corresponding to each channel access priority, and the sidelink control information is a radio resource control signaling.

[0083] In some embodiments, step S403 of determining a time domain region according to the channel access priority and the second time slot may include the following steps:

[0084] Step S4032: Determine the number of time slots according to the channel access priority, where there is a mapping relationship between the channel access priority and the number of time slots;

[0085] Step S4036: Determine a time domain region according to the number of time slots, where the number of time slots is the number of time slots included in the time domain region.

[0086] In some embodiments, after step S4032 of determining the number of time slots according to the channel access priority, the method further includes step S4034 of determining the first time slot of the first sidelink information. Specifically, it may include: Marking each time slot that is later than the second time slot and the interval between it and the second time slot is greater than or equal to N as the second target time slot, where N is the number of time slots and N is an integer greater than or equal to 0; Determining the first time slot as the time slot that is the earliest in the time domain, belongs to the first sidelink resource pool, and the previous adjacent time slot belongs to the second link resource pool.

[0087] In some embodiments, step S4036 of determining a time domain region according to the number of time slots may include: Determining the N consecutive time slots before the first time slot as the time domain region, where N is the number of time slots.

[0088] Through the embodiments of the present application, the second terminal can determine the time-frequency resources for its own information transmission based on the time domain region (such as the time interval when the first terminal performs the channel access process) occupied by the first sidelink information to be sent by the first terminal according to the second sidelink information, avoiding the time domain resources or time-frequency resources that will cause LBT blocking for the second terminal, thereby solving the problem that it is difficult for user equipment in different sidelink resource pools to avoid channel access process blocking in the related art, and achieving the technical effect of avoiding information transmission blocking.

[0089] Figure 5 It is a schematic diagram of the time-frequency resources of the first sidelink information and the second sidelink information in an embodiment of the present application, such asFigure 5 As shown, the time-frequency resources used for the first sidelink information (represented in light gray) and the second sidelink information (represented in dark gray) are located in different sidelink resource pools.

[0090] In this embodiment, taking the number of time slots N = 4 as an example, there are at least 4 time slots (slots) between the first time slot and the second time slot.

[0091] In this embodiment, the first terminal sends the second sidelink information in the second time slot of the second sidelink resource pool. The first terminal sends the first sidelink information in the first time slot (slot m) of the first sidelink resource pool. Among them, the sidelink control information (SCI) corresponding to the second sidelink information includes an indication of the CAPC value of the first sidelink information.

[0092] In this embodiment, the first terminal determines the second time slot based on the pre-determined first time slot and the first preset rule.

[0093] In an exemplary embodiment, the first preset rule includes: among the multiple time slots included in the second sidelink resource pool, select the time slot that is earlier than the first target time slot and is the closest to the first target time slot in the time domain as the second time slot. Among them, the Nth time slot before the first time slot is marked as the first target time slot.

[0094] In an exemplary embodiment, the first preset rule can also be expressed as that the second time slot is the latest time slot among the time slots included in the second sidelink resource pool among the multiple time slots that are at least N time slots earlier than the first time slot.

[0095] In this embodiment, the number of time slots N can take any non-negative integer.

[0096] In this embodiment, the second terminal receives the second sidelink information in the second time slot, and based on the second preset rule, determines the first time slot used by the first terminal to send the first sidelink information based on the second time slot.

[0097] 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.

[0098] In an exemplary embodiment, the first time slot determined by the second preset rule is the earliest second target time slot that satisfies the following conditions: belonging to the first sidelink resource pool, and the time slot immediately adjacent to the second target time slot before belongs to the second sidelink resource pool.

[0099] In this embodiment, as Figure 5As shown, the second terminal receives the second sidelink information, determines that the second target time slots include slot m and slot m + 1, and then determines that the first time slot among the second target time slots is slot m.

[0100] In some embodiments of the present application, the first sidelink information corresponds to one of K CAPC values (Channel Access Priorities). The SCI indicating the first sidelink information includes one CAPC value, which is one of the K CAPC values and represents the CAPC value of the first sidelink information.

[0101] In this embodiment, the first terminal transmits the second sidelink information, and there is a mapping relationship between at least one of the frequency domain resource, time domain resource, time domain length, and code domain resource of the second sidelink information and the CAPC value. The first terminal determines at least one of the frequency domain resource, time domain resource, time domain length, and code domain resource of the second sidelink information based on the mapping relationship and the CAPC value of the first sidelink information.

[0102] In an exemplary embodiment, the first sidelink information corresponds to one of K CAPC values, where each of the K CAPC values corresponds to one of K frequency domain resources. The CAPC value corresponding to the first sidelink information is one of the above K CAPC values, and the first terminal uses the frequency domain resource mapped by this CAPC value to transmit the second sidelink information.

[0103] In an exemplary embodiment, the first sidelink information corresponds to one of K CAPC values, and X of the K CAPC values respectively correspond to one of X frequency domain resources. The CAPC value corresponding to the first sidelink information is one of the above K CAPC values. Among them, the X CAPC values with the smallest CAPC values respectively 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 the CAPC value corresponding to the first sidelink information belongs to one of the X CAPC values, the first terminal transmits the second sidelink information and uses the frequency domain resource mapped by this CAPC value to transmit the second sidelink information. If the CAPC value corresponding to the first sidelink information does not belong to one of the X CAPC values, the first terminal does not transmit the second sidelink information.

[0104] In a special case, X can be equal to K.

[0105] In an exemplary embodiment, the first sidelink 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 sidelink information of the first terminal is one of the above K CAPC values, and the first terminal uses the time length mapped by this CAPC value to send the second sidelink information.

[0106] In an exemplary embodiment, the first sidelink information corresponds to one of K CAPC values, and X of the K CAPC values each corresponds to one of X time lengths. The CAPC value corresponding to the first sidelink information is one of the above K CAPC values. Among them, X CAPC values with the smallest CAPC values each correspond to one of 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 sidelink information belongs to one of the X CAPC values, the first terminal sends the second sidelink information and uses the time length mapped by this CAPC value to send the second sidelink information. If a CAPC value corresponding to the first sidelink information does not belong to one of the X CAPC values, the first terminal does not send the second sidelink information.

[0107] In a special case, X can be equal to K.

[0108] In some embodiments of the present application, corresponding frequency domain / time domain / code domain resources can be configured for each CAPC value through high-layer signaling (such as RRC signaling).

[0109] In an exemplary embodiment, the RRC signaling carries L CAPC values and at least one of the frequency domain resources, time domain resources, time domain lengths, and code domain resources corresponding to each CAPC value. Here, the frequency domain resources, time domain resources, time domain lengths, and code domain resources are configuration parameters of the second sidelink information. The first terminal determines at least one of the frequency domain resources, time domain resources, time domain lengths, and code domain resources of the second sidelink information according to the configuration parameters in the RRC signaling.

[0110] In an exemplary embodiment, the CAPC value of the first sidelink information is one of the above L CAPCs. The first terminal determines the frequency domain resources of the second sidelink information according to the frequency domain resources configured for this CAPC value by the RRC signaling.

[0111] In some embodiments of the present application, a second sidelink resource pool can be configured through high-layer signaling (such as RRC signaling).

[0112] In this embodiment, the first terminal sends the first sidelink information in the first sidelink resource pool and sends the second sidelink information in the second sidelink resource pool.

[0113] In an exemplary embodiment, the RRC signaling includes configuration information of a first SL resource pool. The first SL resource pool is a dedicated sidelink resource pool for transmitting a positioning reference signal (PRS for short). The terminal can transmit the PRS in the first SL resource pool and transmit the SCI for indicating the PRS.

[0114] In an exemplary embodiment, the RRC signaling includes configuration information of a second SL resource pool. The second SL resource pool is a sidelink resource pool for transmitting the PSSCH or a shared resource pool for SL PRS and PSSCH. When the second SL resource pool is a SL resource pool for transmitting the PSSCH, the terminal can transmit the PSCCH and the PSSCH in this SL resource pool. When the second SL resource pool is a shared SL resource pool for transmitting SL PRS and PSSCH, the terminal can transmit the PSCCH, the PSSCH, and the SL PRS in this SL resource pool.

[0115] In an exemplary embodiment, the index of the second SL resource pool is included in the first SL resource pool. The first terminal transmits the first sidelink information in the first SL resource pool, and determines the second SL resource pool for transmitting the second sidelink information according to the index of the second SL resource pool included in the first SL resource pool, and transmits the second sidelink information in the SL resource pool corresponding to the index.

[0116] In an exemplary embodiment, the first SL resource pool is a SL resource pool for transmitting the 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 for the first terminal to determine the second SL resource pool is the same as the above description and will not be elaborated.

[0117] In some embodiments of the present application, multiple CAPC values and the time-frequency resources corresponding to each CAPC value can be configured through high-layer signaling (such as RRC signaling).

[0118] In an exemplary embodiment, the RRC signaling includes: multiple CAPC values and the time-frequency resources corresponding to each CAPC value. Y different first terminals respectively transmit the first sidelink information and the second sidelink information. When the Y first sidelink information corresponds to the same CAPC value, within a resource block set, the frequency-domain resources determined by the Y first terminals for their respective second sidelink information are the same. And these Y second sidelink information are the same sidelink information, that is, the content and format of the transmitted information are the same.

[0119] In an exemplary embodiment, the RRC signaling includes: a plurality of CAPC values, and the time length corresponding to each CAPC value. For the first sidelink information with the same CAPC value, the time length of the corresponding second sidelink information is the same. And these second sidelink information are the same sidelink information, that is, the content and format of the transmitted information are the same.

[0120] In an exemplary embodiment, the RRC signaling includes: a plurality of CAPC values, and the code domain sequence or code domain cyclic shift corresponding to each CAPC value. For the first sidelink information with the same CAPC value, the code domain sequence and code domain cyclic shift of the corresponding second sidelink information are the same. And these second sidelink information are the same sidelink information, that is, the content and format of the transmitted information are the same.

[0121] In some embodiments of the present application, a channel can be defined as a frequency domain resource with a bandwidth of usually 20 MHz and belonging to the unlicensed spectrum. In the unlicensed spectrum, a communication node performs a channel access process for one or more channels, and can send information on this / these channels only when it is evaluated that the channel is available.

[0122] In an embodiment of the present application, a channel may include a number of resource blocks available for information transmission, referred to as a resource block set (RB set). In addition to the resource block set, a channel may also include other resource blocks for protecting the bandwidth.

[0123] In an embodiment of the present application, an SL resource pool contains a number of time-frequency resources, including a number of frequency domain resources in the frequency domain and a number of time domain units in the time domain. Exemplarily, each time domain unit is a time slot (slot).

[0124] In an exemplary embodiment, the time-frequency resources included in an SL resource pool are time-frequency resources available for sidelink communication (or time-frequency resources available for PSSCH transmission).

[0125] In an exemplary embodiment, an SL resource pool may include multiple resource block sets in the frequency domain.

[0126] Figure 6 This is a schematic diagram (I) of the structure of the second sidelink information in a time slot in an embodiment of the present application, as Figure 6 shown, each time slot contains multiple time domain symbols, and within a time slot, the time domain symbols used to send the second sidelink information are marked as target time domain symbols.

[0127] In this embodiment, the time slot (the second time slot) of the second sidelink information 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 for SL PRS and PSSCH, or a PSSCH resource pool.

[0128] In this embodiment, the first time domain symbol of this time slot is a replicated time domain symbol. Within a certain frequency domain range, this time domain symbol is a replication of another time domain symbol. Immediately following the replicated time domain symbol, there are 2 or 3 PSCCH time domain symbols. The time domain symbols of the second sidelink information are marked as target time domain symbols. The time domain symbol immediately adjacent after the target time domain symbol is not used to transmit any information other than CPE. The time domain symbol immediately adjacent before the target time domain symbol is not used to transmit any information other than CPE, and several time domain symbols before this time domain symbol, including the time domain symbols of PSSCH.

[0129] In this embodiment, the target time domain symbol includes at least one of the following features:

[0130] The target time domain symbol includes the penultimate time domain symbol within a time slot, or includes the penultimate and the antepenultimate time domain symbols within a time slot;

[0131] The target time domain symbol includes the penultimate time domain symbol among the SL time domain symbols within a time slot, or includes the penultimate and the antepenultimate time domain symbols within a time slot;

[0132] The time domain symbol immediately adjacent after the target time domain symbol is not used to transmit any sidelink information other than CPE, that is, this time domain symbol can be empty or used to transmit cyclic prefix extension information;

[0133] The time domain symbol immediately adjacent before the target time domain symbol is not used to transmit any sidelink information other than CPE, that is, this time domain symbol can be empty or used to transmit cyclic prefix extension information.

[0134] Figure 7 It is a schematic diagram (II) of the structure of the second sidelink information within a time slot in an embodiment of the present application, as Figure 7 shown. Each time slot contains multiple time domain symbols. Within a time slot, the time domain symbols used to transmit the second sidelink information are marked as target time domain symbols.

[0135] In this embodiment, the time slot (the second time slot) of the second sidelink information is a time slot included in the time domain of the second SL resource pool. The second SL resource pool is a dedicated resource pool for SL PRS.

[0136] In this embodiment, the first time-domain symbol of the time slot is a replicated time-domain symbol, and within a certain frequency-domain range, this time-domain symbol is a replication of another time-domain symbol. Immediately following the replicated time-domain symbol are 2 or 3 PSCCH time-domain symbols. The time-domain symbol of the second sidelink information is marked as the target time-domain symbol. The time-domain symbol immediately adjacent after the target time-domain symbol is not used to transmit any sidelink information other than that for the CPE, and the time-domain symbol immediately adjacent before the target time-domain symbol is not used to transmit any sidelink information other than that for the CPE. A number of time-domain symbols before the time-domain symbol immediately adjacent before the target time-domain symbol include the time-domain symbols of the SL PRS.

[0137] In this embodiment, the target time-domain symbol includes at least one of the following features:

[0138] The target time-domain symbol includes the penultimate time-domain symbol within a time slot, or includes the penultimate and the antepenultimate time-domain symbols within a time slot;

[0139] The target time-domain symbol includes the penultimate time-domain symbol among the SL time-domain symbols within a time slot, or includes the penultimate and the antepenultimate time-domain symbols within a time slot;

[0140] The time-domain symbol immediately adjacent after the target time-domain symbol is not used to transmit any SL information other than that for the CPE, that is, this time-domain symbol can be empty or is used to transmit cyclic prefix extension information;

[0141] The time-domain symbol immediately adjacent before the target time-domain symbol is not used to transmit any SL information other than that for the CPE, that is, this time-domain symbol can be empty or is used to transmit cyclic prefix extension information.

[0142] An embodiment of the present application also provides a terminal for performing information transmission according to the steps in any of the above method embodiments. This terminal can be the first terminal or the second terminal in the above embodiments.

[0143] In some embodiments, the terminal can be a mobile terminal or a vehicle-mounted terminal in V2X communication, and the present application does not limit this.

[0144] An embodiment of the present application also provides a computer-readable storage medium, in which a computer program is stored. When the computer program is run by a processor, it executes the steps in any of the above method embodiments.

[0145] In an exemplary embodiment, the above computer-readable storage medium may include, but is not limited to: various media such as USB flash drives, read-only memory (ROM), random access memory (RAM), mobile hard disks, magnetic disks, or optical discs that can store computer programs.

[0146] An embodiment of the present application also provides an electronic device, including a memory and a processor. A computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0147] In an exemplary embodiment, the above electronic device may further include a transmission device and an input / output device. Among them, the transmission device is connected to the above processor, and the input / output device is connected to the above processor.

[0148] Specific examples in this embodiment may refer to the examples described in the above embodiments and exemplary embodiments, and will not be repeated here.

[0149] Obviously, those skilled in the art should understand that the above modules or steps of the present application can be implemented by a general-purpose computing device. They can be concentrated on a single computing device or distributed on a network composed of multiple computing devices. They can be implemented by program codes executable by the computing device. 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 executed in a different order from here, or they can be separately made into individual integrated circuit modules, or multiple modules or steps among them can be made into a single integrated circuit module to implement. In this way, the present application is not limited to any specific combination of hardware and software.

[0150] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the principle of the present application shall be included in the protection scope of the present application.

Claims

1. An information transmission method, characterized in that, Applied to a first terminal, the method includes: Determine a second time slot according to the channel access priority of first sidelink information and a first time slot, where the second time slot is before the first time slot, the first time slot is located in a first sidelink resource pool, and the second time slot is located in a second sidelink resource pool; Transmit second sidelink information in the second time slot, where the second sidelink information is used to indicate the channel access priority, and the channel access priority is used for a second terminal to determine a time domain region, and the second terminal determines one or more time-frequency resources based on the time domain region, and at least one of the one or more time-frequency resources is used for the second terminal to transmit third sidelink information; Transmit the first sidelink information in the first time slot.

2. The method according to claim 1, characterized in that, The method further includes: determining resources of the second sidelink information within one time slot.

3. The method according to claim 2, characterized in that, Determining resources of the second sidelink information within one time slot includes at least one of the following: Determine the frequency domain resources of the second sidelink information according to the channel access priority; Determine the time domain resources of the second sidelink information according to the channel access priority; Determine the time domain length of the second sidelink information according to the channel access priority; Determine the code domain resources of the second sidelink information according to the channel access priority.

4. The method according to claim 1, characterized in that, The first sidelink resource pool and the second sidelink resource pool are different types of sidelink resource pools.

5. The method according to claim 4, characterized in that, The first sidelink resource pool is a dedicated resource pool for sidelink positioning reference signals, and the second sidelink resource pool is a shared resource pool for sidelink positioning reference signals and physical sidelink shared channels or a physical sidelink shared channel resource pool; Or, the first sidelink resource pool is the shared resource pool for sidelink positioning reference signals and physical sidelink shared channels or the physical sidelink shared channel resource pool, and the second sidelink resource pool is the dedicated resource pool for sidelink positioning reference signals.

6. The method according to claim 1, characterized in that, Wherein, The frequency domain resources of the first sidelink information include a plurality of first resource blocks, where the first resource blocks belong to a first frequency domain set; The frequency domain resources of the second sidelink 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 a plurality of consecutive resource blocks, and the intersection of different resource block sets is empty.

7. The method according to claim 6, characterized in that, The method further includes: determining the frequency domain resources of the second sidelink information, including: Mark the intersection of the first frequency domain set and the second frequency domain set as a third frequency domain set; Use at least one third resource block in the third frequency domain set as the frequency domain resources of the second sidelink information.

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

9. The method according to claim 1, characterized in that, Before determining the second time slot according to the channel access priority of the first sidelink information and the first time slot, the method further includes: Receiving sidelink control information sent by a base station, where the sidelink control information carries at least one channel access priority and the number of time slots corresponding to each channel access priority, and the sidelink control information is radio resource control information.

10. The method according to claim 1, characterized in that, Before determining the second time slot according to the channel access priority of the first sidelink information and the first time slot, the method further includes: Receiving control information related to the second sidelink information sent by the base station, where the control information includes at least one of the following: Frequency domain configuration information of the second sidelink information; Time domain information of the second sidelink information within one time slot; Sidelink resource pool information of the second sidelink information.

11. The method according to claim 1, characterized in that, Before determining the second time slot according to the channel access priority of the first sidelink information and the first time slot, the method further includes: Receiving sidelink control information related to the second sidelink information sent by the base station, where the sidelink control information includes at least one of the following: Frequency domain position of the second sidelink information within a frequency domain resource block set; At least one of the channel access priorities and the frequency domain resources of the second sidelink information corresponding to each channel access priority; At least one of the channel access priorities and the time domain resources of the second sidelink information corresponding to each channel access priority; At least one of the channel access priorities and the time domain lengths of the second sidelink information corresponding to each channel access priority; At least one of the channel access priorities and the code domain resources of the second sidelink information corresponding to each channel access priority.

12. The method according to claim 1, characterized in that, Sending the second sidelink information in the second time slot includes: Sending the second sidelink information in a target time domain symbol within the second time slot, where 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 penultimate time domain symbol within the second time slot; The target time domain symbol includes the penultimate and the antepenultimate time domain symbols within the second time slot; The target time domain symbol includes the penultimate time domain symbol among the sidelink time domain symbols within the second time slot; The target time domain symbol includes the penultimate and the antepenultimate time domain symbols among the sidelink time domain symbols within the second time slot; Only cyclic prefix extension information is sent or no information is sent in the time domain symbol adjacent to the target time domain symbol before it; Only cyclic prefix extension information is sent or no information is sent in the time domain symbol adjacent to the target time domain symbol after it.

13. An information transmission method, characterized in that, Applied to a second terminal, the method includes: Receiving the second sidelink information sent by a first terminal in the second time slot; Determine the channel access priority of the first sidelink information according to the second sidelink information, where the first sidelink information is the sidelink information sent by the first terminal after the second sidelink information; Determine a time domain region according to the channel access priority and the second time slot; Determine one or more time-frequency resources based on the time domain region; Transmit the third sidelink information on at least one of the time-frequency resources.

14. The method according to claim 13, characterized in that, Determining the channel access priority of the first sidelink information according to the second sidelink information includes at least one of the following: Determine the channel access priority according to the frequency domain resource of the second sidelink information, where there is a mapping relationship between the channel access priority and the frequency domain resource of the second sidelink information; Determine the channel access priority according to the time domain resource of the second sidelink information, where there is a mapping relationship between the channel access priority and the time domain resource of the second sidelink information; Determine the channel access priority according to the time domain length of the second sidelink information, where there is a mapping relationship between the channel access priority and the time domain length of the second sidelink information; Determine the channel access priority according to the code domain resource of the second sidelink information, where there is a mapping relationship between the channel access priority and the code domain resource of the second sidelink information.

15. The method according to claim 13, characterized in that, Before determining a time domain region according to the channel access priority and the second time slot, the method further includes: Receive sidelink control information sent by the base station, where the sidelink control information carries at least one channel access priority and the number of time slots corresponding to each channel access priority, and the sidelink control information is a radio resource control signaling.

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

17. The method according to claim 16, characterized in that, After determining the number of time slots according to the channel access priority, the method further includes: Mark each time slot that is later than the second time slot and the interval between it and the second time slot is greater than or equal to N as the second target time slot, where N is the number of time slots and N is greater than or equal to 0; Determine the first time slot as the second target time slot that is the earliest in the time domain, belongs to the first sidelink resource pool, and the previous adjacent time slot belongs to the second link resource pool.

18. According to the method described in claim 17, wherein, Determining a time domain region according to the number of time slots includes: Determine the N consecutive time slots before the first time slot as the time domain region, where N is the number of time slots.

19. A terminal, wherein, For information transmission according to the method described in any one of claims 1 to 12.

20. A terminal, wherein, For information transmission 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 the computer program, when run by a processor, executes the method described in any one of claims 1 to 12 or 13 to 18.

22. An electronic device, comprising a memory and a processor, wherein, A computer program is stored in the memory, and the processor is configured to run the computer program to execute the method described in any one of claims 1 to 12 or 13 to 18.

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