Signal transmission method, terminal and storage medium

Abstract

The invention discloses a signal transmission method, a terminal and a storage medium, and the method comprises the steps: a first terminal transmits at least one of a reference signal and a PSCCH related to the reference signal on an unauthorized resource according to preset information or a preset rule; the method specifically comprises at least one of the following steps: a first terminal sends a first target reference signal and a first target PSCCH in a time slot in a first COT; the first terminal sends at least one of a second target reference signal and a second target PSCCH in a time slot occupied by the initial channel; the first terminal does not send the third target reference signal and the third target PSCCH on the time slot in the second COT; wherein the first COT is the channel occupation time occupied by the first terminal, or the channel occupation time shared to the first terminal; wherein the second COT is the channel occupation time which is occupied by other terminals except the first terminal and is not shared to the first terminal.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a signal transmission method, a terminal and a storage medium. Background Art

[0002] In the related art, a user equipment (UE, also referred to as a terminal) can have at most two starting symbols in a slot, that is, the UE can send data for half a slot, for example, the data can be placed in the subsequent position of the second starting symbol, and there is only one end symbol in a slot.

[0003] On the sidelink (SL), the UE can use the Listen Before Talk (LBT) method in the unlicensed frequency band to access the channel and then transmit information. Therefore, for the SL of the unlicensed spectrum, the resource configuration of the SL reference signal of the initial time slot, such as the Positioning Reference Signal (PRS), and the subsequent slot-based SL reference signal configuration may be different, and the position of the Physical SideLink Control Channel (PSCCH) associated with the SL reference signal may also be different in the initial time slot and subsequent slots. Therefore, if a unified transmission method is used, it may cause the UE to fail to transmit the reference signal and the PSCCH associated with the reference signal. Summary of the invention

[0004] The embodiments of the present application provide a signal transmission method, a terminal, and a storage medium, which can solve the problem of signal transmission failure in SL of unlicensed spectrum.

[0005] In a first aspect, a signal transmission method is provided, comprising: a first terminal transmits a reference signal and at least one of a physical sublink control channel PSCCH related to the reference signal on an unauthorized resource according to preset information or preset rules; wherein the transmission of the reference signal and at least one of the physical sublink control channel PSCCH related to the reference signal on the unauthorized resource comprises at least one of the following: the first terminal sends a first target reference signal and a first target PSCCH related to the first target reference signal in a time slot within a first channel occupancy time COT; the first terminal sends a second target reference signal and at least one of a second target PSCCH related to the second target reference signal in a time slot occupied by the initial channel; the first terminal does not send a third target reference signal and a third target PSCCH related to the third target reference signal in a time slot within a second COT; wherein the first COT is the channel occupancy time occupied by the first terminal, or the channel occupancy time shared with the first terminal; wherein the second COT is the channel occupancy time occupied by other terminals except the first terminal and not shared with the first terminal.

[0006] In a second aspect, a signal transmission device is provided, comprising: an acquisition module for acquiring preset information or preset rules; a transmission module for transmitting a reference signal and a PSCCH related to the reference signal on unauthorized resources according to the preset information or preset rules; wherein the transmission module transmits at least one of the reference signal and the PSCCH related to the reference signal on unauthorized resources, including at least one of the following: sending a first target reference signal and a first target PSCCH related to the first target reference signal in a time slot within a first channel occupancy time COT; sending a second target reference signal and at least one of the second target PSCCH related to the second target reference signal in a time slot occupied by the initial channel; not sending a third target reference signal and a third target PSCCH related to the third target reference signal in a time slot within a second COT; wherein the first COT is the channel occupancy time occupied by the device, or the channel occupancy time shared with the device; wherein the second COT is the channel occupancy time occupied by other terminals other than the device and not shared with the device.

[0007] In a third aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be executed on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0008] In a fourth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the processor is used to execute the steps of the method described in the first aspect, and the communication interface is used to communicate with an external device.

[0009] In a fifth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented.

[0010] In a sixth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the method described in the first aspect.

[0011] In a seventh aspect, a computer program / program product is provided, wherein the computer program / program product is stored in a storage medium, and the program / program product is executed by at least one processor to implement the steps of the method described in the first aspect.

[0012] In an embodiment of the present application, a first terminal transmits a reference signal and a PSCCH related to the reference signal on an unlicensed resource according to preset information or preset rules, wherein the first terminal sends a first target reference signal and a first target PSCCH related to the first target reference signal in a time slot within the first COT; and / or, the first terminal sends a second target reference signal and at least one of a second target PSCCH related to the second target reference signal in a time slot occupied by an initial channel; and / or, the first terminal does not send a third target reference signal and a third target PSCCH related to the third target reference signal in a time slot within the second COT. Through the technical solution provided by the embodiment of the present application, the first terminal can send a first target reference signal and a first target PSCCH related to the first target reference signal in a time slot within the first COT and send a second target reference signal and at least one of a second target PSCCH related to the second target reference signal in a time slot occupied by an initial channel, so that the first terminal can transmit a reference signal and a PSCCH related to the reference signal in a time slot within the first COT and in a time slot occupied by an initial channel according to preset information or preset rules, thereby adapting to the signal transmission of the SL of the unlicensed spectrum and avoiding transmission errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A block diagram showing a wireless communication system to which the embodiments of the present application can be applied;

[0014] Figure 2 A schematic diagram showing a flow chart of a signal transmission method provided in an embodiment of the present application;

[0015] Figure 3a A schematic diagram of a time slot structure in an embodiment of the present application is shown;

[0016] Figure 3b Another schematic diagram of a time slot structure in an embodiment of the present application is shown;

[0017] Figure 3c A schematic diagram of another time slot structure in an embodiment of the present application is shown;

[0018] Figure 3d A schematic diagram of another time slot structure in an embodiment of the present application is shown;

[0019] Figure 4a A schematic diagram of another time slot structure in an embodiment of the present application is shown;

[0020] Figure 4b A schematic diagram of another time slot structure in an embodiment of the present application is shown;

[0021] Figure 4c A schematic diagram of another time slot structure in an embodiment of the present application is shown;

[0022] Figure 4d A schematic diagram of another time slot structure in an embodiment of the present application is shown;

[0023] Figure 4e A schematic diagram of another time slot structure in an embodiment of the present application is shown;

[0024] Figure 5 A schematic diagram of another time slot structure in an embodiment of the present application is shown;

[0025] Figure 6 A schematic diagram of another time slot structure in an embodiment of the present application is shown;

[0026] Figure 7 A schematic diagram of another time slot structure in an embodiment of the present application is shown;

[0027] Figure 8 A schematic diagram of another time slot structure in an embodiment of the present application is shown;

[0028] Fig. 9 A schematic diagram of another time slot structure in an embodiment of the present application is shown;

[0029] Fig.10 A schematic diagram of another time slot structure in an embodiment of the present application is shown;

[0030] Fig.11 A schematic diagram of another time slot structure in an embodiment of the present application is shown;

[0031] Fig.12a A schematic diagram of another time slot structure in an embodiment of the present application is shown;

[0032] Figure 12b A schematic diagram of another time slot structure in an embodiment of the present application is shown;

[0033] Fig.13 A schematic diagram showing a structure of a signal transmission device provided in an embodiment of the present application is shown;

[0034] Fig.14 A schematic diagram showing the structure of a communication device provided in an embodiment of the present application is shown;

[0035] Fig.15 A schematic diagram of the hardware structure of a terminal provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0037] The terms "first", "second", etc. of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of one type, and the number of objects is not limited, for example, the first object can be one or more. In addition, "or" in the present application represents at least one of the connected objects. For example, "A or B" covers three schemes, namely, Scheme 1: including A but not including B; Scheme 2: including B but not including A; Scheme 3: including both A and B. The character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0038] The term "indication" in this application can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, operations to be performed, or request results in the sent indication; an indirect indication can be understood as the receiver determining the corresponding information according to the indication sent by the sender, or making a judgment and determining the operation to be performed or the request result according to the judgment result.

[0039] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following descriptions, but these technologies can also be applied to systems other than NR systems, such as the 6th generation (6 th Generation, 6G) communication system.

[0040] Figure 1 A block diagram of a wireless communication system applicable to the embodiment of the present application is shown. The wireless communication system includes a relay terminal 11, a network side device 12 and a remote terminal 13. In the embodiment of the present application, the remote terminal 13 communicates with the relay terminal 11 via a PC5 (secondary link) interface, and the relay terminal 11 communicates with the network side device 12 via a Uu interface.

[0041] Among them, the relay terminal 11 can also be called a relay terminal device or a relay user terminal (User Equipment, UE), the remote terminal 13 can also be called a remote terminal device or a remote UE, the relay terminal 11 and the remote terminal 13 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), a wearable device (Wearable Device) or a vehicle-mounted device (VUE), a pedestrian terminal (PUE) and other terminal side devices, and the wearable device includes: a bracelet, a headset, glasses, etc. It should be noted that the specific types of the relay terminal 11 and the remote terminal 13 are not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be referred to as a radio access network (RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (WLAN) access point (AS) or a wireless fidelity (WiFi) node, etc.Among them, the base station may be referred to as a Node B (NB), an evolved Node B (eNB), a next generation Node B (gNB), a New Radio Node B (NR Node B), an access point, a Relay Base Station (RBS), a Serving Base Station (SBS), a Base Transceiver Station (BTS), a radio base station, a radio transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a Home Node B (HNB), a Home Evolved Node B (home evolved Node B), a Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0042] The core network equipment may include but is not limited to at least one of the following: core network node, core network function, mobility management entity (Mobility Management Entity, MME), access mobility management function (Access and Mobility Management Function, AMF), session management function (Session Management Function, SMF), user plane function (User Plane Function, UPF), policy control function (Policy Control Function, PCF), policy and charging rules function unit (Policy and Charging Rules Function, PCRF), edge application service discovery function (Edge Application Server Discovery Function, EASDF), unified data management (Unified Data Management, UDM), unified data storage (Unified Data Repository, UDR), home user server (Home Subscriber Server, HSS), centralized network configuration (CNC), network storage function (Network Repository Function, NRF), network exposure function (Network Exposure Function, NEF), local NEF (Local NEF, or L-NEF), binding support function (Binding Support Function, BSF), application function (Application Function, AF), etc. It should be noted that in the embodiments of the present application, only the core network device in the NR system is introduced as an example, and the specific type of the core network device is not limited.

[0043] Currently, the New Radio (NR) system supports sidelink (or translated as secondary link, side link, side link, etc.) transmission, which is used for direct data transmission between user equipment (UE) without going through network equipment. The 5G NR system supports unicast, multicast or broadcast transmission.

[0044] For NR SL resource allocation, NR V2X defines two modes: mode 1, where the base station schedules resources, and mode 2, where the UE decides what resources to use for transmission. At this time, the resource information may come from the base station's broadcast message or pre-configuration. If the UE works within the base station range and has a radio resource control (RRC connection) with the base station, it can be mode 1 or mode 2. If the UE works within the base station range but has no RRC connection with the base station, it can only work in mode 2. If the UE is outside the base station range, it can only work in mode 2 and perform V2X transmission based on pre-configured information. In mode 1, the base station schedules / activates / releases the UE's SL resources based on DCI; in mode 2, the UE selects resources, and the SCI indicates the resources selected by the UE.

[0045] The selected resource granularity is slot in the time domain and subchannel in the frequency domain.

[0046] In addition, R17 SL defines a two-level sidelink control information (SCI) design. The first-level SCI (that is, SCI format 1-A) is carried in the PSCCH channel and carries the following contents: priority, frequency domain resource allocation, time domain resource allocation, resource reservation period, demodulation reference signal (DMRS) style, second-level SCI format, beta offset value indication, number of DMRS ports, modulation and coding scheme (MCS), MCS table indication, PSFCH overhead indication, reservation, and conflict information reception flag.

[0047] The second level SCI (i.e. SCI format 2-A, SCI format 2-B, SCI format 2-C) is carried in the PSSCH. The format of the second level SCI is indicated by the first SCI. The second level SCI starts in the symbol of the first DMRS carried in the PSSCH and is mapped in the order of increasing symbols of the PSSCH.

[0048] SCI format 2-A is used for decoding of PSSCH. The feedback information considered includes scenarios of positive acknowledgment (ACK) and negative acknowledgment (NACK), or NACK-only feedback scenarios, or scenarios without feedback. The contents carried are as follows: HARQ process number, New data indicator, redundancy version, Source ID, Destination ID, HARQ feedback enabled / disabled indicator, Cast type indicator, (CSI request).

[0049] SCI format 2-B is used for decoding of PSSCH, considering the scenario of feedback information only NACK, or the scenario of no feedback information. The contents carried are as follows: HARQ process number, New data indicator, redundancy version, Source ID, Destination ID, HARQ feedback enabled / disabled indicator, zone ID, Communication range requirement;

[0050] SCI format 2-C is used for decoding of PSSCH. It carries coordination information between UEs or requests for coordination information between UEs. The contents carried are as follows: HARQ process number, New data indicator, redundancy version, Source ID, Destination ID, HARQ feedback enabled / disabled indicator, CSI request, Providing / Requesting indicator. When 'Providing / Requesting indicator' is 0, it also includes Resource combinations, first resource location, reference slot location, resource set type, lowest subchannel indices; when 'Providing / Requesting indicator' is 1, it also includes priority, number of subchannels, resource reservation period, resource selection window location, resource set type, and padding bit.

[0051] The first-level SCI is carried in the PSCCH, and the second-level SCI is carried in the PSSCH.

[0052] In addition, the SL PRS signal is introduced in positioning for SL positioning. In SL positioning, scheme 1 is supported for SL-PRS resource allocation based on network scheduling, and scheme 2 is supported for SL-PRS resource allocation based on UE autonomous selection. Dynamic scheduling and configured grant type 1 / type 2 resource allocation are supported in scheme 1, and DCI may exist for resource scheduling / activation / release. Resource allocation autonomously selected by UE includes sensing based resource selection and random resource selection. SCI exists for resource scheduling.

[0053] In addition, the SL PRS signal can be located in a dedicated resource pool or a shared resource pool. If it is a SL PRS dedicated resource pool, PSCCH and SL PRS signals exist in the SL PRS dedicated resource pool. Single-stage SCI is used in the dedicated resource pool, and single-stage SCI is carried on PSCCH. Single-stage SCI is used to schedule SL-PRS. If it is a shared resource pool, backward compatibility with SL services needs to be considered, that is, information is transmitted in the same resource pool as R16 / R17, and the impact on the transmission performance of R16 / R17 UE is reduced. The shared resource pool includes information transmission of PSCCH+PSSCH+SL-PRS. Two-stage SCI scheduling information is used in the shared resource pool. The 1st SCI is carried on PSCCH, and the 2nd SCI is carried on PSSCH.

[0054] In SL positioning, SL-PRS supports TDM multiplexing within the slot at the symbol level and FDM multiplexing within the RB / subchannel at the RE level, or comb based multiplexing.

[0055] In SL, reference signals can be used for beam training. SL CSI-RS can be used to define beams. Currently, SL CSI-RS has not been defined.

[0056] In addition, Sidelink can use unlicensed spectrum. For SL-U (sidelink in unlicensed spectrum), it is necessary to obtain the channel through LBT before sending SL data. The following is a brief introduction to LBT technology:

[0057] In future communication systems, shared spectrum such as unlicensed bands can be used as a supplement to licensed bands to help operators expand services. In order to be consistent with NR deployment and maximize NR-based unlicensed access, unlicensed bands can operate in 5GHz, 37GHz and 60GHz bands. Since unlicensed bands are shared by multiple technologies (RATs), such as WiFi, radar, LTE-LAA, etc., in some countries or regions, unlicensed bands must comply with regulations when used to ensure that all devices can use the resource fairly, such as LBT (listen before talk), maximum channel occupancy time MCOT (maximum channel occupancy time) and other rules. When a transmission node needs to send information, it needs to do LBT first, and perform power detection (energy detection, ED) on the surrounding nodes. When the detected power is lower than a threshold, the channel is considered to be idle and the transmission node can send. Otherwise, the channel is considered to be busy and the transmission node cannot send. The transmission node can be a base station, UE, WiFi AP, etc. After the transmission node starts transmitting, the occupied channel time COT cannot exceed MCOT. In addition, according to the occupied channel bandwidth (OCB) regulation, in the unlicensed frequency band, the transmission node must occupy at least 70% (60 GHz) or 80% (5 GHz) of the bandwidth of the entire frequency band during each transmission.

[0058] The types of LBT commonly used in NRU can be divided into Type 1, Type 2A, Type 2B and Type 2C. Type 1 LBT is a channel listening mechanism based on back-off. When the transmitting node senses that the channel is busy, it backs off and continues to listen until it senses that the channel is empty. Type 2C means that the sending node does not perform LBT, that is, no LBT or immediate transmission. Type 2A and Type 2B LBT are one-shot LBT, that is, the node performs LBT once before transmission, and transmits if the channel is empty, and does not transmit if the channel is busy. The difference is that Type 2A performs LBT within 25us, which is applicable when the gap between two transmissions is greater than or equal to 25us when the COT is shared. Type 2B performs LBT within 16us, which is applicable when the gap between two transmissions is equal to 16us when the COT is shared. In addition, there is Type 2 LBT, which is applicable to LAA / eLAA / FeLAA. When sharing COT, the gap between two transmissions is greater than or equal to 25us, and eNB and UE can use Type 2 LBT. In addition, in frequency range 2-2, the types of LBT are Type 1, Type 2 and Type 3. Type 1 is a channel listening mechanism based on fallback, Type 2 is one-shot LBT, and 5us LBT is performed within 8us, and Type 3 does not perform LBT.

[0059] LBT includes two types: frame-based equipment (Frame Based Equipment, FBE) and load-based equipment (Loadbased Equipment, LBE).

[0060] Among them, Frame Based Equipment (FBE) refers to a device whose sending / receiving timing adopts a periodic structure, and its period is Fixed Frame Period (FFP). FBE nodes use a channel access mechanism based on LBT to occupy the channel. The node that initiates a transmission sequence containing one or more continuous transmissions is called an initiating node (Initiating Device), and other nodes are called responding nodes (Responding Device). FBE nodes can be initiating nodes, responding nodes, or support both node functions.

[0061] For LBE, the transmitting node can start LBT at any time and can only transmit after it detects that the channel is empty. For the transmitting node, there is no fixed listening time, and it does not need to skip when it detects that the channel is busy. It can continue to listen by backoffing several eCCAs until the eCCA counter is zero.

[0062] On SL, LBE in the unlicensed frequency band can be used for channel access and information transmission.

[0063] In the related art, a UE can have at most two starting symbols in a slot, that is, the UE can send data of half a slot (that is, the data can be placed in the subsequent position of the 2nd starting symbol); and there is only one end symbol in a slot.

[0064] The possible problems caused by SL PRS sending are:

[0065] 1. The resource configuration of the SL PRS in the initial time slot (i.e., part of the symbols in a time slot) and the subsequent slot-based SL PRS configuration may be different. The PSCCH position associated with the SL PRS may also be different in the initial time slot and the subsequent slot. Therefore, a unified configuration cannot be used; or,

[0066] 2. Since there is only one end symbol in a slot, at least half of the slot's data is sent in a time slot, and it is not possible to switch between sending and receiving in each slot. The candidate enhancement includes introducing mini-slots, which is a slot split into two independent mini-slot structures, and the terminal can switch between sending and receiving in the slot.

[0067] In response to the above problems, an embodiment of the present application provides a signal transmission solution. The signal transmission solution provided by the embodiment of the present application is described in detail below through some embodiments and their application scenarios in combination with the accompanying drawings.

[0068] Figure 2 200 is a flow chart showing a transmission method in an embodiment of the present application. The method 200 can be executed by a first terminal. In other words, the method can be executed by software or hardware installed on the first terminal. Figure 2 As shown, the method may include the following steps.

[0069] S210: The first terminal transmits at least one of a reference signal and a PSCCH related to the reference signal on an unlicensed resource according to preset information or preset rules.

[0070] The transmitting of at least one of a reference signal and a PSCCH related to the reference signal on unlicensed resources may include at least one of the following:

[0071] The first terminal sends a first target reference signal and a first target PSCCH related to the first target reference signal in a time slot within a first channel occupation time COT;

[0072] The first terminal sends at least one of a second target reference signal and a second target PSCCH related to the second target reference signal in a time slot occupied by the initial channel;

[0073] The first terminal does not send a third target reference signal and a third target PSCCH related to the third target reference signal in a time slot within the second COT;

[0074] The first COT is the occupation time of a channel occupied by the first terminal, or the occupation time of a channel shared with the first terminal;

[0075] The second COT is the channel occupation time occupied by other terminals except the first terminal and not shared with the first terminal.

[0076] In an embodiment of the present application, the reference signal may be a SL PRS, or a SL CSI reference signal (CSI-RS), or a reference signal related to an FR2 beam.

[0077] In an embodiment of the present application, the first terminal transmits at least one of a reference signal and a PSCCH associated with the reference signal on an unauthorized resource according to preset information or preset rules, and the PSCCH associated with the reference signal is used to transmit the first control information (such as 1st SCI), which can be understood as a PSCCH resource for transmitting the first control information associated with the reference signal. Optionally, the first control information includes one of the following indications: information about the COT resource or association information of the current and reserved reference signals.

[0078] The associated information of the reference signal includes at least one of the following:

[0079] (1) third indication information, where the third indication information is used to indicate that the resource supports location sharing;

[0080] (2) fourth indication information, where the fourth indication information is used to indicate a condition for sharing the COT;

[0081] (3) a resource identifier of the first reference signal;

[0082] (4) Destination address identifiers of other terminals that share COT resources;

[0083] (5) a terminal identifier of a terminal associated with the resource reservation and indication information;

[0084] (6) first resource indication information, where the resource indication information is used to indicate resources reserved for the first terminal;

[0085] (7) second resource indication information, where the second resource indication information is used to indicate repeated transmission on a resource;

[0086] (8) third resource indication information, where the third resource indication information is used to indicate continuous occupation of resources;

[0087] (9) second reference signal request indication information, where the second reference signal request indication information is used to request the sending of the second reference signal, where the second reference signal is a signal received by the first terminal or a signal that the first terminal expects other terminals to send;

[0088] (10) Resource pool information;

[0089] (11) Cast type

[0090] (12) Priority information of the first reference signal.

[0091] In one example of an embodiment of the present application, the first target reference signal and the second target reference signal can be target reference signals selected from a candidate reference signal list according to mode 1 or mode 2 resources. Optionally, the first target reference signal and the second target reference signal have the same target reference signal identifier, or target reference signal identifiers with different identifiers.

[0092] In another example of the embodiment of the present application, the first target reference signal and the second target reference signal can be target reference signals determined by selecting mode 1 or mode 2 resources from different candidate reference signal lists.

[0093] In one example of an embodiment of the present application, the first target reference signal and the second target reference signal can be target reference signals selected from a candidate reference signal list according to mode 1 or mode 2 resources. Optionally, the first target reference signal and the second target reference signal have the same target reference signal identifier, or target reference signal identifiers with different identifiers.

[0094] In an example of an embodiment of the present application, the first target reference signal and the second target reference signal can be selected from a candidate reference signal list according to the target reference signal determined by mode 1 or mode 2 resource selection. Optionally, if the starting symbol of the initial access time slot is not the first slot of the SL time slot, or the starting symbol is located after the starting symbol of the reference signal, the second target reference signal only transmits the signal on the remaining corresponding symbols of the signal.

[0095] In an example of an embodiment of the present application, the first target reference signal and the second target reference signal can be selected from a candidate reference signal list according to the target reference signal determined by mode 1 or mode 2 resource selection. Optionally, if the starting symbol of the initial access time slot is not the first slot of the SL time slot, or the starting symbol is located before the starting symbol of the reference signal and after the starting symbol of the PSCCH, the terminal repeatedly transmits the second target reference signal on the starting symbol until the starting symbol of the second target reference signal is known.

[0096] In another example of the embodiment of the present application, the first target reference signal and the second target reference signal can be target reference signals determined by selecting mode 1 or mode 2 resources from different candidate reference signal lists.

[0097] In an embodiment of the present application, the third target reference signal is a target reference signal determined according to resource selection in mode 1 or mode 2. Optionally, the third target reference signal fails in LBT before sending the third target reference signal or the third target PSCCH, and the terminal does not send the third target reference signal and the third target PSCCH.

[0098] In an embodiment of the present application, the third target reference signal is a target reference signal determined according to resource selection in mode 1 or mode 2. Optionally, the third target reference signal is LBT successful before sending the third target reference signal or the third target PSCCH, but the resource is occupied by other terminals, and the terminal does not send the third target reference signal and the third target PSCCH.

[0099] In the embodiment of the present application, the reference signal transmitted by the terminal on the unauthorized basis can be the reference signal and the PSCCH related to the reference signal according to the above preset information or preset rules.

[0100] In the embodiment of the present application, the preset information or preset rule is used to indicate at least one of the following:

[0101] (1) The first terminal sends a first target reference signal and a first target PSCCH related to the first target reference signal in a time slot within a first channel occupation time COT;

[0102] (2) The first terminal sends at least one of a second target reference signal and a second target PSCCH related to the second target reference signal in a time slot occupied by an initial channel.

[0103] The preset information or preset rules include at least one of the following:

[0104] (1) a first time domain candidate pattern of the first target reference signal and the first target PSCCH related to the first target reference signal within the first channel occupation time COT;

[0105] (2) A second time domain candidate pattern of at least one of the second target reference signal and a second target PSCCH associated with the second target reference signal in a time slot occupied by an initial channel.

[0106] In an embodiment of the present application, the first time domain candidate pattern and the second time domain candidate pattern may be configured by the network side to the first terminal, for example, the first terminal receives the first time domain candidate pattern and the second candidate time domain pattern configured by the network side device, or may be pre-configured in the first terminal, for example, written in the chip of the first terminal. In this way, the first terminal can transmit the reference signal and the PSCCH related to the reference information in the time slot within the first COT or the time slot occupied by the initial channel according to the first time domain candidate pattern configured during the first channel occupation time and the second time domain candidate pattern configured for the time slot occupied by the initial channel, thereby realizing different transmissions in the time slots within the first COT and the time slots occupied by the initial channel.

[0107] In an optional embodiment, the first time domain pattern includes at least one of the following:

[0108] 1. The first SL symbol is an AGC symbol, the last SL symbol is a GP symbol, the PSCCH carrying the SCI starts at the second SL symbol and occupies 1, 2 or 3 symbols, the PSCCH symbol is followed by an AGC symbol of an SL PRS and / or a GP symbol, and the remaining symbols are symbols for transmitting reference signals (optional examples, such as Figure 3a )

[0109] 2. The first SL symbol is an AGC symbol, the last SL symbol is a GP symbol, the PSCCH carrying the SCI starts at the second SL symbol, occupies 1, 2 or 3 symbols, the PSCCH symbol is followed by at least two TDM reference signal resources, and each reference signal resource is preceded by an AGC symbol (optional example, such as Figure 4d )

[0110] 3. The SL slot includes two mini-slots, the first symbol of each mini-slot is an AGC symbol, the last SL symbol of each mini-slot is a GP symbol, the PSCCH carrying the SCI starts at the second SL symbol of the mini-slot, occupies 1, 2 or 3 symbols, and the remaining symbols of the mini-slot are used to transmit reference signals (optional examples, such as Figure 6 )

[0111] The first time domain pattern also includes: the frequency domain bandwidth of the PSCCH is one or more subchannels, or one or more interleaved resources, the interleaved resources include multiple PRBs, and adjacent PRBs of the interleaved resources are separated by Y PRBs. The first time domain pattern also includes: the frequency domain bandwidth of the reference signal is a first target frequency domain range. The first target frequency range includes at least one of the following:

[0112] A frequency domain range included in the first dedicated resource pool;

[0113] One or N1 resource block sets in the first dedicated resource pool, where N1 is less than or equal to the N.

[0114] Optionally, the first target frequency range also includes a guard band between the N1 resource block sets.

[0115] In an optional embodiment, the first time domain pattern is determined by configuring or pre-configuring candidate PSCCH resources or candidate SL PRS resources. For example, if the candidate PSCCH resources have only one starting symbol, and the candidate SL PRS resources also have only one starting symbol, the first time domain pattern is the above-mentioned case 1. For example, if the candidate PSCCH resources have only one starting symbol, but the candidate SL PRS resources have different starting symbols, the first time domain pattern is case 2. For another example, if the candidate PSCCH and candidate SL PRS resources have different starting symbols, it is case 3.

[0116] In an alternative embodiment,

[0117] The second time domain pattern includes at least one of the following:

[0118] (1) a pattern identical to the first time-domain pattern;

[0119] (2) The starting symbol of the time slot from the initial access is an AGC symbol, and the last symbol is a GP symbol. The PSCCH carrying the SCI starts at the first symbol after the starting symbol and occupies 1, 2 or 3 symbols. The PSCCH symbol is followed by an AGC symbol of an SL PRS and / or a GP symbol. The symbols after the AGC symbol of the SL PRS until the penultimate symbol of the time slot (including the penultimate symbol of the time slot) are symbols used to transmit reference signals.

[0120] (3) The starting symbol of the time slot from the initial access is the AGC symbol, the last symbol is the GP symbol, and the remaining symbols are symbols used to transmit reference signals (such as Figure 5 ).

[0121] (4) The starting symbol of the time slot from the initial access is an AGC symbol, the last symbol is a GP symbol, and the remaining symbols include symbols used to transmit the PSCCH.

[0122] Optionally, in one embodiment, under the first condition, the pattern related to the first time domain pattern is used, and under the second condition, the pattern listed above except for the first time domain pattern is used. Optionally, the first condition may be that the starting symbol of the initial access is 0, or is the first initial access starting symbol. Optionally, the second condition may be that the starting symbol of the initial access is not 0, or is the second initial access symbol, or the position of the first access starting symbol is greater than the first threshold.

[0123] For example, the first time domain candidate pattern of the time slot occupied by the initial channel and the second time domain candidate pattern in the first COT can be different, so that there are multiple optional starting symbols at the time of access, so as to gain more transmission opportunities for the subsequent actual sending of SL PRS (that is, if there is only one starting symbol, the terminal only determines whether LBT is successful before the starting symbol, and the transmission opportunities are reduced by half compared to two starting symbols).

[0124] Figure 3a A schematic diagram of a time slot structure without time division multiplexing (TDM) in a time slot is shown. Figure 3aAs shown, there is only one start symbol and the start symbol of SL PRS in one slot, and the start symbol defaults to 0 (i.e., the first automatic gain control (AGC) symbol in FIG3); the start symbol of SL PRS is the start symbol of SL PRS in the figure, which is located after SCI (i.e., pscch). For example, the pattern related to the first time domain pattern, it can be understood that the second time domain pattern is affected by the initial access start symbol X, and the time domain patterns of SCI and SL PRS (such as the start symbol and length) will change accordingly.

[0125] For example, Figure 3b Another schematic diagram of the time slot structure is shown in FIG. Figure 3b As shown, the second candidate time domain pattern of the time slot outside the COT (i.e., the time slot occupied by the initial channel) is different from the first candidate time domain pattern of the time slot within the COT (i.e., the time slot within the first COT). The second candidate time domain pattern of the time slot outside the COT includes 2 end positions and 2 reference signal resources, while the first candidate time domain pattern of the time slot within the COT includes 1 end position and 1 reference signal resource.

[0126] Of course, this is not limited to this. Figure 3c As shown, the first time domain candidate pattern of the time slot occupied by the initial channel and the second time domain candidate pattern in the first COT may also be the same.

[0127] (3) The number of start positions and end positions supported in a time slot is greater than 1. Optionally, the time slot may be a time slot for transmitting a reference signal and a PSCCH associated with the reference signal. That is, the number of start positions and end positions supported in a time slot for transmitting a reference signal and a target PSCCH associated with the reference signal is greater than 1. Thus, the number of start positions and end positions supported in a time slot can be enhanced. Multiple end positions enable switching between sending and receiving in each mini-slot, making more efficient use of resources. For example, in Figure 3b In , the time slot outside the COT supports 2 starting positions and 2 ending positions. For another example, in Figure 3d In the embodiment, the time slot outside the COT supports 2 starting positions and 2 ending positions. The time slot inside the COT also supports 2 starting positions and 2 ending positions. It is worth noting that in an optional embodiment, such as Figure 3d In the embodiment, the candidate PSCCH resources or SL PRS resources or time domain patterns outside or inside the COT may be the same.

[0128] In one implementation, the second time domain candidate pattern includes two starting symbol positions of initial access. For example, the second time domain candidate pattern of the configured initial channel occupancy includes two starting symbol positions of initial access (e.g., a target SL PRS and a PSCCH associated with the target SL PRS), which can be understood as different access starting symbol positions, resulting in multiple optional (different) SL PRS time domain patterns and / or PSCCH time domain positions on the access slot, such as Figure 3b or Figure 3c shown.

[0129] In the above implementation, optionally, the first starting symbol position of the two initial access starting symbol positions is preset to at least one of the following symbols in a time slot: the first symbol, the second symbol, the third symbol, the fourth symbol, the fifth symbol, the sixth symbol, and the seventh symbol. That is, 1 of the two initial access starting symbol positions st The starting symbol can be preconfigured to at least one of {#0{default},#1,#2,#3,#4,#5,#6}, wherein the configuration of the first starting symbol can be configured in units of one carrier (per Carrier), or one bandwidth part (per BWP) or one resource pool (per resource pool).

[0130] Optionally, the second starting symbol position of the two initial access starting symbol positions is preset to at least one of the following symbols in a time slot: the fourth symbol, the fifth symbol, the sixth symbol, the seventh symbol, and the eighth symbol. nd The starting symbol is preconfigured to at least one of {#3, #4, #5, #6, #7}}, wherein the configuration of the second starting symbol can be configured in units of one carrier (per Carrier), or one bandwidth part (per BWP) or one resource pool (per resource pool).

[0131] In one implementation, the second time domain pattern of at least one of the second target reference signal and the second target PSCCH related to the second target reference signal is determined according to the starting symbol position of the initial access obtained by the first terminal performing listen-before-talk (LBT) in the initial access time slot.

[0132] In one implementation, when the first starting symbol occupied by the initial channel of the first terminal is not the first symbol in an SL time slot, or the first starting symbol occupied by the initial channel of the first terminal is different from the second starting symbol of transmitting the first target reference signal or the first target PSCCH in the first COT, the first terminal determines the second time domain pattern of at least one of the second target reference signal and the second target PSCCH related to the second target reference signal according to one of the following:

[0133] (1) According to the position of the first starting symbol, the number of symbols of the second target reference signal in the time slot occupied by the initial channel is obtained.

[0134] For example, the number of symbols of the second target reference signal in the time slot occupied by the initial channel may be acquired according to the configuration information related to the first starting symbol.

[0135] Alternatively, the number of symbols of the second target reference signal in the time slot occupied by the initial channel may be calculated according to the length of the first time slot where the first starting symbol is located, the position of the ending symbol of the first time slot, and the length of the second target PSCCH in the first time slot. In other words, the number of symbols of the second target reference signal may be calculated according to the length of the first starting symbol position slot, the ending position, and the symbol length of the PSCCH. For example, if the length of the SL slot is 14 symbols, the ending position is symbol #13, if the starting symbol is symbol X1, and the PSCCH is 2 symbols, the number of symbols that can be used to transmit the SL PRS = 14-1(ending)-2(PSCCH)-1(pscch AGC)-1(sl prs AGC)-X1.

[0136] For example, in Figure 3c In the embodiment, if the first starting symbol occupied by the initial channel of the first terminal is the same as the second starting symbol for transmitting the first target reference signal or the first target PSCCH within the first COT, the terminal can select a target reference signal from the candidate reference signals of the first target reference signal to transmit the second target reference signal and PSCCH resources.

[0137] For example, in Figure 4a In the embodiment, if the first starting symbol occupied by the initial channel of the first terminal is different from the second starting symbol for transmitting the first target reference signal or the first target PSCCH in the first COT, the number of symbols of the second target reference signal in the time slot occupied by the initial channel can be calculated according to the length of the first time slot where the first starting symbol is located, the position of the end symbol of the first time slot, and the length of the second target PSCCH in the first time slot.

[0138] For example, in Figure 4a In the embodiment, if the first starting symbol occupied by the initial channel of the first terminal is different from the second starting symbol transmitting the first target reference signal or the first target PSCCH in the first COT, the second target reference signal and / or the second target PSCCH can be determined according to the second time domain pattern.

[0139] (2) According to the position of the first starting symbol, obtain the position of a third starting symbol for transmitting the second target reference signal.

[0140] For example, the third starting symbol position for transmitting the second target reference signal may be acquired according to the configured information related to the first starting symbol.

[0141] Alternatively, the third starting symbol position of the second target reference signal may be calculated according to a target rule. For example, the third starting position may be determined to be the first starting position or the sum of the first starting position and 1. For example, Figure 4b If the starting symbol of the slot outside the COT (i.e., the time slot occupied by the initial channel) is not the first symbol in an SL time slot (i.e., not symbol #0), then the third starting symbol position of the second target reference signal in the time slot occupied by the initial channel is determined to be the sum of the first starting position and 1.

[0142] Alternatively, the third starting position is determined according to the first starting position and the length of the second target PSCCH in the first time slot. Figure 4c If the starting symbol of the slot outside COT (i.e., the time slot occupied by the initial channel) is not the first symbol in an SL time slot (i.e., not symbol #0), the third starting position of the second target reference signal can be determined by AGC based on the first starting position and the length of the second target PSCCH in the first time slot.

[0143] In the above implementation, optionally, the method may also include: when the third starting position is the first starting position or the sum of the first starting position and 1, the first terminal only sends the second target reference signal in the time slot occupied by the initial channel, that is, when the third starting position is the first starting position or the sum of the first starting position and 1, the first terminal only sends the second target reference signal in the time slot occupied by the initial channel, and does not send the second target PSCCH related to the second target reference signal.

[0144] Optionally, the preset information or preset rule includes one of the following:

[0145] (1) When the first starting symbol of the time slot occupied by the initial channel of the first terminal is not the first symbol in a SL time slot, or when the first starting symbol of the time slot occupied by the initial channel of the first terminal is different from the second starting symbol of the first target reference signal or the first target PSCCH transmitted in the first COT, the first terminal only sends the second target PSCCH in the time slot occupied by the initial channel;

[0146] (2) When the first starting symbol of the time slot occupied by the initial channel of the first terminal is not the first symbol in an SL time slot, or when the first starting symbol of the time slot occupied by the initial channel of the first terminal is different from the second starting symbol of the first target reference signal or the first target PSCCH transmitted in the first COT, the first terminal only sends the second target reference signal in the time slot occupied by the initial channel.

[0147] In the above implementation, when the first terminal only sends the second target reference signal in the time slot occupied by the initial channel, the first terminal only detects the PSCCH of one candidate symbol position in one time slot when sensing the channel occupancy of other terminals. That is to say, when the first terminal only sends the second target reference signal in the time slot occupied by the initial channel, the first terminal only detects the PSCCH of one candidate symbol position in one time slot, thereby reducing the detection of the first terminal, which can greatly help the UE save power.

[0148] In one implementation, the first terminal transmits at least one of a reference signal and a PSCCH related to the reference signal on an unlicensed resource according to preset information or preset rules, including:

[0149] Step 1, the first terminal receives target configuration information including multiple reference signal resources or multiple PSCCH resources;

[0150] Optionally, the target configuration information is related to at least one of the following: information indicating a time slot occupied by an initial channel or within the first COT; information related to a starting symbol position occupied by the initial channel.

[0151] For example, the configuration parameters of the SL PRS include symbol X, where symbol X is the starting symbol position occupied by the initial channel + symbol X.

[0152] Step 2: The first terminal determines, according to the target configuration information, to transmit at least one of a reference signal and a PSCCH related to the reference signal on the unlicensed resources.

[0153] In the above implementation, the target configuration information may include first configuration information of SLPRS resource for transmitting SL-PRS / PSCCH in the first COT, wherein the first configuration information may include M1 candidate SL PRS resources. Optionally, it may also be indicated that the first configuration information is used in the first COT or is related to the starting symbol 0.

[0154] In the above implementation, the target configuration information may also include second configuration information of one or more SL PRS resources or SL PRS resource lists in the time slot occupied by the initial channel. The second configuration information is used to indicate configuration information of one or more reference signals related to the starting symbol position of the initial access.

[0155] Optionally, the SL PRS resource or SL PRS resource list indication is related to the starting symbol position of the initial access (the first SLPRS and the PSCCH related to the first SL PRS).

[0156] For example, SL PRS resource list 1 is SL PRS configuration information corresponding to the 1st starting symbol, and SL PRS resource list 2 is SL PRS configuration information corresponding to the 2nd starting symbol.

[0157] For another example, the starting symbol or symbol length of the SL PRS resource is variable (in this case, a SL PRS resource list is configured based on the starting symbol of the first SL PRS actually transmitted by the UE and the PSCCH related to the first SL PRS) to determine the final time domain configuration of the SL PRS (it can be understood that the UE first determines that the starting symbol of the first SL PRS and the PSCCH related to the first SL PRS is one of the 1st and 2nd starting symbols according to the LBT, and then determines the configuration of the transmitted SL PRS resource based on the starting symbol).

[0158] Optionally, the actual starting symbol of the SL PRS = (pre-) configured starting symbol + (the starting symbol of the first SL PRS actually transmitted by the UE and the PSCCH related to the first SL PRS - 1st starting symbol).

[0159] Optionally, the actual starting symbol of the SL PRS = (pre-) configured starting symbol + (starting symbol of the first SL PRS actually transmitted by the UE and the PSCCH related to the first SL PRS).

[0160] Optionally, the actual symbol length M of the SL PRS = (pre-) configured symbol length - (the starting symbol of the first SL PRS actually transmitted by the UE and the PSCCH related to the first SL PRS).

[0161] Optionally, the actual symbol length M of the SL PRS = (pre-) configured symbol length - (the starting symbol of the first SL PRS actually transmitted by the UE and the PSCCH related to the first SL PRS - 1st starting symbol).

[0162] In the above implementation, the target configuration information may further include third configuration information of one or more PSCCH resources or PSCCH resource lists in the time slot occupied by the initial channel.

[0163] In one implementation, the first time-domain candidate pattern is different from the second time-domain candidate pattern including:

[0164] (1) In the case where one time slot in the first COT supports two time division multiplexing (TDM) reference signal resources, a TDM reference signal is not included between the start symbol and the end symbol of the second time domain candidate pattern occupied by the initial channel;

[0165] (2) when a time slot in the first COT includes a PSCCH, the time slot occupied by the initial channel does not include the second PSCCH;

[0166] (3) When the first time domain candidate pattern in the first COT is static, the second time domain candidate pattern of the time slot occupied by the initial channel is variable, wherein the second time domain candidate pattern is variable means that the second time domain candidate pattern is different according to the starting symbol of the time slot occupied by the initial channel;

[0167] (4) When a first time domain candidate pattern within the first COT corresponds to a determined first time domain pattern, a second time domain candidate pattern of the time slot occupied by the initial channel includes at least two second time domain patterns depending on the starting symbol of the time slot occupied by the initial channel.

[0168] In one implementation, when the first COT supports a time slot including at least two TDM reference signal resources, if the first starting symbol occupied by the initial channel is not the first symbol in a SL time slot, or the first starting symbol occupied by the initial channel of the first terminal is different from the second starting symbol of the first target reference signal or the first target PSCCH transmitted in the first COT, the TDM reference signal is not included between the starting symbol and the ending symbol of the second time domain candidate pattern of the time slot occupied by the initial channel.

[0169] For example, in Figure 4d In the time slot structure shown, one time slot includes two TDM SL PRS resources (such as Figure 4d The two SL PRS in Figure 4d In a time slot, there is only one access start symbol (such as Figure 4d The symbol of the first AGC in the , the default symbol is 0), greater than the starting position of 1 SL PRS, such as Figure 4d The starting position of the two SL PRS in the slot. According to the current SL PRS transmission mechanism, a UE can send at most one SL PRS resource in a slot, which will cause PRS / UE1 or PRS / UE2 to be idle and may be occupied by other rats. Figure 4d The time slot structure shown is enhanced, and the UE can occupy multiple TDM SL PRS resources in the time slot occupied by the initial channel, thereby ensuring the continuity of SL resources.

[0170] Optionally, in the above implementation, the candidate PSCCH positions occupied by the initial channel are smaller than the candidate PSCCH positions in the first COT, or the number of candidate reference signals occupied by the initial channel is smaller than the number of candidate reference signals in the first COT.

[0171] In the above optional manner, the candidate PSCCH position or the number of candidate SL PRS in the time slot occupied by the initial channel does not consider TDM resources, and is therefore smaller than the number of candidate PSCCH positions or candidate SL PRS in the first COT, that is, the number of SL PRS configured in the time slot occupied by the initial channel is different from the number of SL PRS configured in the first COT. Figure 4e shown.

[0172] In the above implementation, optionally, the symbol length of the candidate reference signal of the time slot occupied by the initial channel is smaller than the symbol length of the candidate reference signal configured in the first COT, such as Figure 4c .

[0173] In the above implementation, optionally, the symbol length of the candidate reference signal of the time slot occupied by the initial channel is greater than the symbol length of the candidate reference signal configured in the first COT, such as Figure 4b or 4a.

[0174] In one implementation, the first terminal sends a first target reference signal and a first target PSCCH related to the first target reference signal in a time slot within a first channel occupation time COT, including:

[0175] The first terminal sends the first target reference signal and a first target PSCCH related to the first target reference signal in a time slot within the first COT according to a predetermined manner, wherein the predetermined manner includes at least one of the following:

[0176] (1) Sending multiple reference signals in one time slot; in this implementation, optionally, at least two TDM reference signal resources may be configured in the time slot, and the multiple reference signals are sent on different TDM reference signal resources.

[0177] That is to say, in the above implementation, if more than one SL PRS is sent in one time slot, more than one SL PRS resource will be occupied.

[0178] (2) Sending a reference signal in multiple time slots within the first COT.

[0179] Optionally, when the first terminal sends multiple reference signals in a time slot, at least two TDM reference signal resources are configured in the time slot, and the multiple reference signals are sent on different TDM reference signal resources.

[0180] To ensure uninterrupted transmission, if the interval is greater than 16us, the SL PRS transmission is considered to be an independent transmission. Therefore, in the above implementation, the first COT supports a slot including at least two TDM SL PRS resources, and the UE occupying the first COT resource has at least one of the following characteristics:

[0181] (1) The UE sends SL PRS resources on each TDM resource in a slot, for example, Figure 4a There are two candidate time domain SL PRS starting positions, and the UE sends an SL PRS resource at the above positions.

[0182] (2) The UE continuously sends SL PRS in the slot within the COT.

[0183] In one implementation, the first terminal transmitting the first target reference signal in a predetermined manner includes: when a second condition is met, the first terminal transmitting the first target reference signal in the predetermined manner, wherein the second condition includes at least one of the following:

[0184] a) The UE does not find other resources, wherein the other resources are reference signal resources reserved by the second terminal for COT sharing other than the reference signal resources, for example, the other resources are the TDM resources or slot resources reserved by the UE for COT sharing;

[0185] b) the first terminal does not schedule or trigger the third UE to send a reference signal on the reference signal resource of the TDM;

[0186] c) The UE does not need to receive a reference signal on the TDM reference signal resource.

[0187] In one implementation, the method further includes: in a time slot or a TDM reference signal resource that satisfies a first condition, the first terminal does not send the first target reference signal, wherein the first condition includes at least one of the following:

[0188] (1) The first terminal detects that the second terminal sends a reference signal on the reference signal resource of the time slot or TDM;

[0189] (2) The first terminal schedules the third terminal to send a reference signal on the reference signal resource of the time slot or TDM;

[0190] (3) The first terminal receives a reference signal on the reference signal resource of the time slot or TDM.

[0191] In one implementation, when the first starting symbol of the time slot occupied by the initial channel of the first terminal is not the first symbol in a time slot, the time slot occupied by the initial channel does not include at least one of the following: information on the second target PSCCH, COT resources.

[0192] In the above implementation, optionally, at least one of the following is sent in a time slot within the first COT: information about the second target PSCCH and COT resources. For example, the second target PSCCH or COT information may be sent in the first time slot within the first COT. For example, the time slot structure outside the COT may be as follows: Figure 5 As shown, the time slot structure within the COT can be as follows Figure 3a shown.

[0193] In one implementation, the first target reference signal supports at least two end positions within one time slot.

[0194] In one implementation, when the first target reference signal supports at least two end bits in one time slot, the first COT or one time slot occupied by the initial channel includes at least two candidate positions of PSCCH resources, and each candidate position of the PSCCH resource is associated with the reference signal resource immediately adjacent to the candidate position of the PSCCH resource.

[0195] Figure 6 A schematic diagram of a time slot structure is shown, such as Figure 6 As shown, a time slot includes two access start symbols and one ending symbol (i.e., the position of GaP), as shown in Figure 6 As shown, the AGC symbols in front of the two SCIs can be regarded as the first start symbol and the second start symbol respectively. The related SL PRS are located in the resources behind their own SCIs respectively.

[0196] Figure 7 Another schematic diagram of the time slot structure of an embodiment of the present application is shown in FIG. Figure 7 As shown, a time slot (mini-slot) includes two access start symbols and two ending symbols (i.e., the position of GaP), such as Figure 7 As shown, the AGC symbols in front of the two SCIs can be regarded as the first start symbol and the second start symbol respectively. The related SL PRS are located in the resources behind their own SCIs respectively.

[0197] In the above implementation, optionally, within the first COT, the PSCCH resource includes two candidate start symbol positions, wherein the first candidate start symbol position of the two candidate start symbol positions is the second start symbol in a time slot. For example, within the first COT, the PSCCH resource includes two candidate start symbols, wherein 1 st The candidate starting symbol is symbol #1.

[0198] In the above implementation, optionally, the candidate starting symbol position of the two candidate starting symbol positions is preconfigured or related to the starting symbol of the time slot occupied by the initial channel. For example, the starting symbol of the 2nd PSCCH is preconfigured.

[0199] Optionally, the starting symbol of the second target PSCCH in the time slot occupied by the initial channel is related to the starting symbol of the first target PSCCH in the first COT, for example, the starting symbol of the second target PSCCH in the time slot occupied by the initial channel = the starting symbol of the PSCCH in the COT - 1.

[0200] In one implementation, when the starting symbol of the second target PSCCH in the time slot occupied by the initial channel is unrelated to the starting symbol of the first target PSCCH in the first COT, the gap (GAP) symbol in the first COT can ensure that the first target reference signal cannot be transmitted within a predetermined idle time. For example, the GAP symbol in the symbol in the first COT needs to ensure that a certain idle time (optionally 16us, Xus) cannot transmit SLPRS; or, the first terminal only sends the first target reference signal in the time slot occupied by the initial channel, such as Figure 5 shown.

[0201] In one implementation, when the SL PRS supports at least two end positions in one slot, one time slot may include four AGC symbols. Optionally, the time slot may also include at least two cyclic prefix enhancement (CPE) symbols.

[0202] In one implementation, the method may further include: the first terminal accesses using a type 2 method during the first channel occupancy time.

[0203] In the above implementation, if the first terminal finds that the SL PRS transmission time is less than 1 ms, it can use type 2 access mode in a dedicated RP or a shared channel.

[0204] In the above implementation, optionally, the dedicated resource is a COT resource obtained by the first terminal performing LBT and used to transmit the target reference signal and the target PSCCH.

[0205] In the above implementation manner, optionally, the method may further include: the first terminal sending COT resource information to the second terminal, the COT resource information being used to indicate relevant information about the initial channel occupancy.

[0206] Optionally, the information of the COT resource includes at least one of the following:

[0207] Indicative information of a resource block set associated with a COT;

[0208] The remaining duration of the COT;

[0209] The channel access priority level (CAPC) used;

[0210] The resource identifier occupied;

[0211] Source address of shared COT channel resources;

[0212] Destination address identifier;

[0213] Frequency domain information associated with COT;

[0214] First indication information, where the first indication information is used to indicate that the COT channel resources support resources related to location service sharing;

[0215] second indication information, where the second indication information is used to indicate a condition for sharing the COT;

[0216] Indicative information within COT;

[0217] COT external indication information.

[0218] Optionally, the information of the COT resources is transmitted on the first target PSCCH or the second target PSCCH.

[0219] Optionally, the first terminal transmitting the first target reference signal and the first target PSCCH includes: the first terminal continuously sending the first target reference signal and the first target PSCCH within the COT resources.

[0220] In one implementation, the method may also include: when the first terminal is a transmitting terminal, the first terminal determines that the starting symbol position is one of the starting symbol positions of the two initial accesses by performing LBT, and determines the second target reference signal and the second time domain pattern of the second target PSCCH based on the starting symbol.

[0221] In one implementation, the method may further include: when the first terminal is a receiving terminal, the first terminal monitors at least two PSCCH candidate time domain positions in the time slot occupied by the initial channel, and determines whether there is scheduling of the second target reference signal and the second target PSCCH according to the monitoring result, wherein the PSCCH candidate time domain position is determined according to one of the following:

[0222] (1) The first starting symbol position of the two initial access starting positions; for example, 1 st The start symbol may be preconfigured to be at least one of {#0{default},#1,#2,#3,#4,#5,#6}.

[0223] (2) The second starting symbol position of the two initial access starting positions. For example, 2 nd The start symbol is preconfigured to be at least one of {#3,#4,#5,#6,#7}}.

[0224] In the above implementation, if the first terminal detects the PSCCH at the 1st starting symbol, it can be understood that it has entered the first COT and does not need to detect the 2nd starting symbol (PSCCH / SL PRS).

[0225] In one implementation, the first terminal may monitor one PSCCH candidate time domain position within the first COT, where the PSCCH candidate time domain position is the second symbol in a time slot.

[0226] In one implementation, the first terminal monitors the PSCCH at the same time domain position as that in the first COT in the time slot occupied by the initial channel. In this implementation, the initially accessed SLOT / mini-slot may only include SL PRS occupied symbols, but not PSCCH.

[0227] In an embodiment of the present application, the SL PRS may be a pattern based on comb-based multiplexing, and different SL PRSs are mapped to different RE OFFSETs, that is, the SL PRS is associated with the RE offset and comb value in addition to the start symbol and the symbol length, and the PSCCH is associated with the frequency domain position in addition to the time domain candidate position, for example, Figure 3a The time slot structure shown can be expanded to Figure 8 The time slot structure is shown.

[0228] Furthermore, SL PRS supports TDM and comb-based multiplexing patterns. For example, the time slot structure shown in FIG4 can be expanded to Fig. 9 The time slot structure is shown.

[0229] In related technologies, such as Figure 3a As shown in the figure, the bandwidth occupied by SL PRS and PSCCH on the dedicated resource pool is different. The bandwidth of SL PRS is the bandwidth of the dedicated resource pool, while SCI is the size of 1 subchannel. Direct multiplexing of SCI transmission may not meet the requirements of OCB (i.e., 80% of the frequency domain resources on the LBT subband are required on unlicensed), so this problem can be overcome by enhancing the time slot structure.

[0230] Fig.10 Another extended time slot structure is shown, such as Fig.10 As shown, in addition to the SCI associated with the SL PRS, a common SCI is sent to meet the OCB requirement.

[0231] The common SCI can be used to send the information of the COT resource.

[0232] Among them, the common SCI is sent at the position of the last candidate PSCCH, or at the top of the frequency domain position.

[0233] Fig.11 Another extended time slot structure is shown, such as Fig.11 As shown, in addition to the SCI associated with the SL PRS, 2 common SCIs are sent to meet the OCB requirement.

[0234] Among them, the common SCI is sent at the positions of the last and first candidate PSCCH, or the top and bottom of the frequency domain position, so as to meet the OCB requirement.

[0235] Fig.12a and Figure 12b Another extended time slot structure diagram is shown respectively, such as Fig.12a As shown, in addition to the SCI associated with the SL PRS, one common SCI (yellow) is sent, thereby satisfying the OCB requirement.

[0236] like Figure 12b As shown, the PSCCH associated with the SL PRS occupies the interlaced PRBs, and the interval between adjacent PRBs is Y PRBs, thereby meeting the requirements of OCB.

[0237] The common SCI occupies the interlaced PRBs, the interval between adjacent PRBs is Y PRBs, and the PRBs of the SCI are continuous PRBs except for the common SCI, thereby satisfying the OCB requirement.

[0238] Optionally, in one embodiment, Y is related to the subcarrier spacing, or Y is preconfigured.

[0239] Optionally, the common SCI is a predefined or preconfigured frequency domain position or content, or size.

[0240] Through the above technical solution provided in the embodiment of the present application, the structure of SL PRS and PSCCH inside and outside the COT can be designed in combination with multiple initial access positions, thereby ensuring the signal transmission of SL based on the unlicensed frequency band.

[0241] The signal transmission method provided in the embodiment of the present application can be executed by a signal transmission device. In the embodiment of the present application, the signal transmission device provided in the embodiment of the present application is described by taking the signal transmission method executed by the signal transmission device as an example.

[0242] Fig.13 A schematic diagram of the structure of a signal transmission device provided in an embodiment of the present application is shown. Fig.13 As shown, the device 1300 mainly includes: an acquisition module 1301 and a transmission module 1302.

[0243] In an embodiment of the present application, an acquisition module 1301 is used to acquire preset information or preset rules; a transmission module 1302 is used to transmit a reference signal and a PSCCH related to the reference signal on unlicensed resources according to the preset information or preset rules; wherein the transmission module transmits at least one of the reference signal and the PSCCH related to the reference signal on unlicensed resources, including at least one of the following: sending a first target reference signal and a first target PSCCH related to the first target reference signal in a time slot within a first channel occupancy time COT; sending a second target reference signal and at least one of a second target PSCCH related to the second target reference signal in a time slot occupied by an initial channel; not sending a third target reference signal and a third target PSCCH related to the third target reference signal in a time slot within a second COT; wherein the first COT is the channel occupancy time occupied by the device, or the channel occupancy time shared with the device; wherein the second COT is the channel occupancy time occupied by other terminals other than the device and not shared with the device.

[0244] In one implementation, the preset information or preset rule is used to indicate at least one of the following: the first terminal sends a first target reference signal and a first target PSCCH related to the first target reference signal in a time slot within a first channel occupied time COT; the first terminal sends at least one of a second target reference signal and a second target PSCCH related to the second target reference signal in a time slot occupied by an initial channel;

[0245] Among them, the preset information or preset rules include at least one of the following: a first time domain candidate pattern of the first target reference signal and the first target PSCCH related to the first target reference signal within the first channel occupancy time COT; a second time domain candidate pattern of at least one of the second target reference signal and the first target PSCCH related to the second target reference signal in the time slot occupied by the initial channel; the number of starting positions and ending positions supported in a time slot is greater than 1.

[0246] In one implementation, the first time-domain candidate pattern is different from the second time-domain candidate pattern.

[0247] In one implementation, the transmission module 1302 is further configured to receive the first time domain candidate pattern and the second time domain candidate pattern.

[0248] In one implementation, the second time domain candidate pattern includes two candidate initial access starting symbol positions, and a first starting symbol position of the two initial access starting symbol positions is preset to at least one of the following symbols in a time slot: a first symbol, a second symbol, a third symbol, a fourth symbol, a fifth symbol, a sixth symbol, and a seventh symbol;

[0249] The second starting symbol position of the two initial access starting symbol positions is preset to at least one of the following symbols in a time slot: a fourth symbol, a fifth symbol, a sixth symbol, a seventh symbol, and an eighth symbol;

[0250] The first starting symbol position and the second starting symbol position are configured in units of one carrier, one bandwidth part BWP or one resource pool.

[0251] In one implementation, the second time domain pattern of at least one of the second target reference signal and the second target PSCCH related to the second target reference signal is determined according to the starting symbol position of the initial access obtained by the first terminal performing listen-before-talk (LBT) in the initial access time slot.

[0252] In one implementation, when the first starting symbol of the time slot occupied by the initial channel of the first terminal is not the first symbol in the side link SL time slot, or the first starting symbol occupied by the initial channel of the first terminal is different from the second starting symbol of the first target reference signal or the first target PSCCH transmitted in the first COT, the first terminal determines the second time domain pattern of at least one of the second target reference signal and the second target PSCCH related to the second target reference signal according to one of the following:

[0253] Acquire, according to the position of the first starting symbol, the number of symbols of the second target reference signal in the time slot occupied by the initial channel;

[0254] According to the position of the first starting symbol, the position of a third starting symbol for transmitting the second target reference signal is acquired.

[0255] In one implementation, acquiring, according to the position of the first start symbol, the number of symbols of the second target reference signal in the time slot occupied by the initial channel includes one of the following:

[0256] Acquire the number of symbols of the second target reference signal in the time slot occupied by the initial channel according to the configured configuration information related to the first starting symbol;

[0257] According to the length of the first time slot where the first start symbol is located, the position of the end symbol of the first time slot, and the length of the second target PSCCH in the first time slot, the number of symbols of the second target reference signal in the time slot occupied by the initial channel is calculated.

[0258] In one implementation, acquiring, according to the position of the first start symbol, the position of the third start symbol for transmitting the second target reference signal includes:

[0259] Acquire the third starting symbol position for transmitting the second target reference signal according to the configured configuration information related to the first starting symbol; or,

[0260] A third starting symbol position of the second target reference signal is calculated according to a target rule.

[0261] In one implementation, calculating the third starting symbol position of the second target reference signal according to a target rule includes at least one of the following:

[0262] Determine the third starting position as the first starting position or the sum of the first starting position and 1;

[0263] The third starting position is determined according to the first starting position and the length of the second target PSCCH in the first time slot.

[0264] In one implementation, when the third starting position is the first starting position or the sum of the first starting position and 1, the transmission module 1302 sends only the second target reference signal in the time slot occupied by the initial channel.

[0265] In one implementation, the preset information or preset rule includes one of the following:

[0266] When the first starting symbol of the time slot occupied by the initial channel of the first terminal is not the first symbol in a side link SL time slot, or the first starting symbol of the time slot occupied by the initial channel of the first terminal is different from the second starting symbol of the first target reference signal or the first target PSCCH transmitted in the first COT, the first terminal only sends the second target PSCCH in the time slot occupied by the initial channel;

[0267] When the first starting symbol of the time slot occupied by the initial channel of the first terminal is not the first symbol in a sidelink SL time slot, or the first starting symbol of the time slot occupied by the initial channel of the first terminal is different from the second starting symbol of the first target reference signal or the first target PSCCH transmitted in the first COT, the first terminal only sends the second target reference signal in the time slot occupied by the initial channel.

[0268] In one implementation, the transmission module 1302 is further configured to, when only the second target reference signal is sent in the time slot occupied by the initial channel, detect only the PSCCH of one candidate symbol position in one time slot when sensing the channel occupancy of other terminals.

[0269] In one implementation, transmitting at least one of a reference signal and a physical sidelink control channel PSCCH related to the reference signal on an unlicensed resource according to preset information or preset rules includes:

[0270] Receiving target configuration information including a plurality of reference signal resources or a plurality of PSCCH resources;

[0271] According to the target configuration information, it is determined to transmit at least one of a reference signal and a PSCCH related to the reference signal on the unlicensed resources.

[0272] In one implementation, the target configuration information of the multiple reference signal resources or the multiple PSCCH resources is related to at least one of the following:

[0273] Indicative information of time slots occupied by the first COT or the initial channel;

[0274] Information related to the starting symbol position of the time slot occupied by the initial channel.

[0275] In one implementation, the target configuration information includes at least one of the following:

[0276] First configuration information of a reference signal resource for transmitting the first target reference signal or the first target PSCCH in the first COT;

[0277] second configuration information of one or more reference signal resources or a reference signal resource list in a time slot occupied by the initial channel;

[0278] The third configuration information of one or more PSCCH resources or a PSCCH resource list in the time slot occupied by the initial channel.

[0279] In one implementation, the first configuration information is associated with a first symbol of a time slot.

[0280] In one implementation, the second configuration information is used to indicate configuration information of one or more reference signals related to a starting symbol position of an initial access.

[0281] In one implementation, the first time-domain candidate pattern is different from the second time-domain candidate pattern, including one of the following:

[0282] In the case where one time slot in the first COT supports two time division multiplexing TDM reference signal resources, a TDM reference signal is not included between a start symbol and an end symbol of the second time domain candidate pattern occupied by the initial channel;

[0283] In the case where a time slot within the first COT includes a PSCCH, the time slot occupied by the initial channel does not include the second PSCCH;

[0284] In the case where the first time domain candidate pattern in the first COT is static, the second time domain candidate pattern of the time slot occupied by the initial channel is variable, wherein the second time domain candidate pattern is variable means that the second time domain candidate pattern is different according to the starting symbol of the time slot occupied by the initial channel;

[0285] When a first time domain candidate pattern in the first COT corresponds to a determined first time domain pattern, a second time domain candidate pattern of the time slot occupied by the initial channel includes at least two second time domain patterns depending on the starting symbol of the time slot occupied by the initial channel.

[0286] In one implementation, when the first COT supports a time slot including at least two time division multiplexing (TDM) reference signal resources, if the first starting symbol occupied by the initial channel is not the first symbol in an SL time slot, or the first starting symbol occupied by the initial channel of the first terminal is different from the second starting symbol of the first target reference signal or the first target PSCCH transmitted in the first COT, the TDM reference signal is not included between the starting symbol and the ending symbol of the second time domain candidate pattern occupied by the initial channel.

[0287] In one implementation, the candidate PSCCH positions occupied by the initial channel are smaller than the candidate PSCCH positions in the first COT, or the number of candidate reference signals occupied by the initial channel is smaller than the number of candidate reference signals in the first COT.

[0288] In one implementation, the symbol length of the candidate reference signal of the time slot occupied by the initial channel is smaller than the symbol length of the candidate reference signal configured in the first COT.

[0289] In one implementation, sending a first target reference signal and a first target PSCCH related to the first target reference signal in a time slot within a first channel occupation time COT includes:

[0290] The first target reference signal and a first target PSCCH related to the first target reference signal are sent in a time slot within the first COT according to a predetermined manner, wherein the predetermined manner includes at least one of the following:

[0291] Sending multiple reference signals in one time slot;

[0292] A reference signal is sent over a plurality of time slots within the first COT.

[0293] In one implementation, when multiple reference signals are sent in a time slot, at least two TDM reference signal resources are configured in the time slot, and the multiple reference signals are sent on different TDM reference signal resources.

[0294] In one implementation, the transmission module 1302 is further configured to, in a time slot or a TDM reference signal resource that satisfies a first condition, not send the first target reference signal by the first terminal, wherein the first condition includes at least one of the following:

[0295] Detecting that the second terminal sends a reference signal on the reference signal resource of the time slot or TDM;

[0296] Scheduling a third terminal to send a reference signal on the reference signal resource of the time slot or TDM;

[0297] A reference signal is received on the time slot or the reference signal resource of the TDM.

[0298] In one implementation, transmitting the first target reference signal in a predetermined manner includes:

[0299] When a second condition is met, transmitting the first target reference signal in the predetermined manner, wherein the second condition includes at least one of the following:

[0300] No other resources are found, wherein the other resources are reference signal resources reserved for the second terminal performing COT sharing other than the reference signal resources;

[0301] The third terminal is not scheduled to send a reference signal on the reference signal resource of the TDM;

[0302] There is no need to receive a reference signal on the reference signal resource of the TDM.

[0303] In one implementation, when the first starting symbol of the time slot occupied by the initial channel of the first terminal is not the first symbol in a time slot, the time slot occupied by the initial channel does not include at least one of the following: information on the second target PSCCH, COT resources.

[0304] In one implementation, at least one of the following is sent in a time slot within the first COT: information of the second target PSCCH and COT resources.

[0305] In one implementation, the first target reference signal supports at least two end positions in one time slot.

[0306] In one implementation, a time slot within the first COT or occupied by the initial channel includes at least two candidate positions of PSCCH resources, and each candidate position of the PSCCH resource is associated with a reference signal resource immediately following the candidate position of the PSCCH resource.

[0307] In one implementation, within the first COT, the PSCCH resource includes two candidate starting symbol positions, wherein a first candidate starting symbol position of the two candidate starting symbol positions is a second starting symbol in a time slot.

[0308] In one implementation, the candidate starting symbol position of the two candidate starting symbol positions is preconfigured or related to the starting symbol of the time slot occupied by the initial channel.

[0309] In one implementation, a start symbol of the second target PSCCH in a time slot occupied by the initial channel is correlated with a start symbol of the first target PSCCH in the first COT.

[0310] In one implementation, when the starting symbol of the second target PSCCH in the time slot occupied by the initial channel is not correlated with the starting symbol of the first target PSCCH in the first COT,

[0311] The gap GP symbol in the first COT can ensure that the first target reference signal cannot be transmitted within a predetermined idle time; or,

[0312] The first terminal only sends the second target reference signal in a time slot occupied by the initial channel.

[0313] In one implementation, the one time slot includes 4 automatic gain control AGC symbols.

[0314] In one implementation, the one time slot includes at least two cyclic prefix enhanced (CPE) symbols.

[0315] In one implementation, the transmission module 1302 is further configured to access the first channel using a type 2 access method during the first channel occupation time.

[0316] In one implementation, the transmission module 1302 is further configured to send information about COT resources to the second terminal, where the information about the COT resources is used to indicate relevant information about the initial channel occupancy.

[0317] In one implementation, the COT resource information includes at least one of the following:

[0318] Indicative information of a resource block set associated with a COT;

[0319] The remaining duration of the COT;

[0320] The channel access priority level (CAPC) used;

[0321] The resource identifier occupied;

[0322] Source address of shared COT channel resources;

[0323] Destination address identifier;

[0324] Frequency domain information associated with COT;

[0325] First indication information, where the first indication information is used to indicate that the COT channel resources support resources related to location service sharing;

[0326] second indication information, where the second indication information is used to indicate a condition for sharing the COT;

[0327] Indicative information within COT;

[0328] COT external indication information.

[0329] In one implementation, the information of the COT resources is transmitted on the first target PSCCH or the second target PSCCH.

[0330] In one implementation, the transmission module 1302 transmits the first target reference signal and the first target PSCCH, including: continuously sending the first target reference signal and the first target PSCCH within the COT resources.

[0331] In one implementation, the transmission module 1302 is further used to determine the starting symbol position as one of the two initial access starting symbol positions by performing LBT, and determine the second time domain pattern of the second target reference signal and the second target PSCCH according to the determined starting symbol position.

[0332] In one implementation, the transmission module 1302 is further configured to monitor at least two PSCCH candidate time domain positions in the time slot occupied by the initial channel, and determine whether there is scheduling of the second target reference signal and the second target PSCCH according to the monitoring result, wherein the PSCCH candidate time domain position is determined according to one of the following:

[0333] A first starting symbol position of the two initial access starting positions;

[0334] The second starting symbol position of the two initial access starting positions.

[0335] In one implementation, the transmission module 1302 monitors one PSCCH candidate time domain position in the first COT, where the PSCCH candidate time domain position is the second symbol in a time slot.

[0336] In one implementation, a PSCCH at the same time domain position as that in the first COT is monitored in the time slot occupied by the initial channel.

[0337] The signal transmission device in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices other than a terminal. For example, the terminal may include but is not limited to the types of terminals 11 listed above, and other devices may be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

[0338] The signal transmission device provided in the embodiment of the present application can achieve Figure 2 to Figure 1 The various processes implemented by the method embodiment of 2 and achieving the same technical effect are not described here to avoid repetition.

[0339] like Fig.14 As shown, an embodiment of the present application also provides a communication device 1400, including a processor 1401 and a memory 1402, and the memory 1402 stores programs or instructions that can be executed on the processor 1401. For example, when the communication device 1400 is a terminal, the program or instruction is executed by the processor 1401 to implement the various steps of the above-mentioned signal transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0340] The embodiment of the present application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Figure 2The steps in the method embodiment shown. This terminal embodiment corresponds to the above-mentioned terminal side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to this terminal embodiment and can achieve the same technical effect. Specifically, Fig.15 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0341] The terminal 1500 includes but is not limited to: a radio frequency unit 1501, a network module 1502, an audio output unit 1503, an input unit 1504, a sensor 1505, a display unit 1506, a user input unit 1507, an interface unit 1508, a memory 1509 and at least some of the components of the processor 1510.

[0342] Those skilled in the art will appreciate that the terminal 1500 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 1510 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption through the power management system. Fig.15 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0343] It should be understood that in the embodiment of the present application, the input unit 1504 may include a graphics processing unit (GPU) 15041 and a microphone 15042, and the graphics processing unit 15041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1506 may include a display panel 15061, and the display panel 15061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1507 includes a touch panel 15071 and at least one of other input devices 15072. The touch panel 15071 is also called a touch screen. The touch panel 15071 may include two parts: a touch detection device and a touch controller. Other input devices 15072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0344] In the embodiment of the present application, after receiving downlink data from the network side device, the RF unit 1501 can transmit the data to the processor 1510 for processing; in addition, the RF unit 1501 can send uplink data to the network side device. Generally, the RF unit 1501 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0345] The memory 1509 can be used to store software programs or instructions and various data. The memory 1509 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 1509 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 1509 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0346] The processor 1510 may include one or more processing units; optionally, the processor 1510 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 1510.

[0347] The radio frequency unit 1501 is configured to transmit a reference signal and a PSCCH related to the reference signal on unlicensed resources according to the preset information or preset rules;

[0348] The transmission module transmits at least one of the reference signal and the PSCCH related to the reference signal on the unlicensed resources, including at least one of the following:

[0349] Sending a first target reference signal and a first target PSCCH related to the first target reference signal in a time slot within a first channel occupation time COT;

[0350] Sending at least one of a second target reference signal and a second target PSCCH associated with the second target reference signal in a time slot occupied by the initial channel;

[0351] Not sending a third target reference signal and a third target PSCCH related to the third target reference signal in a time slot within the second COT;

[0352] The first COT is the occupation time of a channel occupied by the device, or the occupation time of a channel shared with the device;

[0353] The second COT is the channel occupation time occupied by other terminals except the device and not shared with the device.

[0354] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiment and achieve the same or corresponding technical effect. To avoid repetition, it will not be repeated here.

[0355] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned signal transmission method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0356] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0357] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned signal transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0358] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0359] The embodiments of the present application further provide a computer program / program product, which is stored in a storage medium and is executed by at least one processor to implement the various processes of the above-mentioned signal transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0360] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0361] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, disk, CD, etc.), including several instructions to enable a terminal or a network-side device to execute the methods described in each embodiment of the present application.

[0362] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of the present application and the scope of protection of the claims, and these implementation methods are all within the protection of the present application.

Claims

1. A signal transmission method, characterized in that: include: The first terminal transmits at least one of a reference signal and a physical sidelink control channel PSCCH related to the reference signal on an unlicensed resource according to preset information or preset rules; The transmitting of at least one of a reference signal and a physical sidelink control channel PSCCH related to the reference signal on unlicensed resources comprises at least one of the following: The first terminal sends a first target reference signal and a first target PSCCH related to the first target reference signal in a time slot within a first channel occupation time COT; The first terminal sends at least one of a second target reference signal and a second target PSCCH related to the second target reference signal in a time slot occupied by the initial channel; The first terminal does not send a third target reference signal and a third target PSCCH related to the third target reference signal in a time slot within the second COT; The first COT is the occupation time of the channel occupied by the first terminal, or the occupation time of the channel shared with the first terminal; The second COT is the channel occupation time occupied by other terminals except the first terminal and not shared with the first terminal.

2. The method according to claim 1, characterized in that: The preset information or preset rule is used to indicate at least one of the following: The first terminal sends a first target reference signal and a first target PSCCH related to the first target reference signal in a time slot within the first COT; The first terminal sends at least one of a second target reference signal and a second target PSCCH related to the second target reference signal in a time slot occupied by the initial channel; The preset information or preset rules include at least one of the following: a first time domain candidate pattern of the first target reference signal and a first target PSCCH related to the first target reference signal in the first COT; A second time domain candidate pattern of at least one of the second target reference signal and the first target PSCCH associated with the second target reference signal in the time slot occupied by the initial channel; The number of start positions and end positions supported in a time slot is greater than 1.

3. The method according to claim 2, characterized in that The first time-domain candidate pattern is different from the second time-domain candidate pattern.

4. The method according to claim 2, characterized in that: The method also includes: the first terminal receiving the first time domain candidate pattern and the second candidate time domain pattern.

5. The method according to any one of claims 2 to 4, characterized in that: The second time domain candidate pattern includes two candidate initial access starting symbol positions, and a first starting symbol position of the two initial access starting symbol positions is preset to at least one of the following symbols in a time slot: a first symbol, a second symbol, a third symbol, a fourth symbol, a fifth symbol, a sixth symbol, and a seventh symbol; The second starting symbol position of the two initial access starting symbol positions is preset to at least one of the following symbols in a time slot: a fourth symbol, a fifth symbol, a sixth symbol, a seventh symbol, and an eighth symbol; The first starting symbol position and the second starting symbol position are configured in units of one carrier, one bandwidth part BWP or one resource pool.

6. According to the method according to any one of claims 1 to 5, the second time domain pattern of at least one of the second target reference signal and the second target PSCCH related to the second target reference signal is determined according to the starting symbol position of the initial access obtained by the first terminal performing listen-before-talk (LBT) in the initial access time slot.

7. The method according to claim 6, characterized in that: In the case where the first starting symbol of the time slot occupied by the initial channel of the first terminal is not the first symbol in the side link SL time slot, or the first starting symbol occupied by the initial channel of the first terminal is different from the second starting symbol of the first target reference signal or the first target PSCCH transmitted in the first COT, the first terminal determines the second time domain pattern of at least one of the second target reference signal and the second target PSCCH related to the second target reference signal according to one of the following: Acquire, according to the position of the first starting symbol, the number of symbols of the second target reference signal in the time slot occupied by the initial channel; According to the position of the first starting symbol, the position of a third starting symbol for transmitting the second target reference signal is acquired.

8. The method according to claim 7, characterized in that The acquiring, according to the position of the first starting symbol, the number of symbols of the second target reference signal in the time slot occupied by the initial channel comprises one of the following: Acquire the number of symbols of the second target reference signal in the time slot occupied by the initial channel according to the configured configuration information related to the first starting symbol; According to the length of the first time slot where the first start symbol is located, the position of the end symbol of the first time slot, and the length of the second target PSCCH in the first time slot, the number of symbols of the second target reference signal in the time slot occupied by the initial channel is calculated.

9. The method according to claim 7, characterized in that: Acquiring, according to the position of the first starting symbol, the position of the third starting symbol for transmitting the second target reference signal, comprises: Acquire the third starting symbol position for transmitting the second target reference signal according to the configured configuration information related to the first starting symbol; or, A third starting symbol position of the second target reference signal is calculated according to a target rule.

10. The method according to claim 9, characterized in that Calculating a third starting symbol position of the second target reference signal according to a target rule includes at least one of the following: Determine the third starting position as the first starting position or the sum of the first starting position and 1; The third starting position is determined according to the first starting position and the length of the second target PSCCH in the first time slot.

11. The method according to claim 10, characterized in that The method further includes: when the third starting position is the first starting position or the sum of the first starting position and 1, the first terminal only sends the second target reference signal in the time slot occupied by the initial channel.

12. The method according to claim 1 or 6, characterized in that: The preset information or preset rules include one of the following: When the first starting symbol of the time slot occupied by the initial channel of the first terminal is not the first symbol in a side link SL time slot, or the first starting symbol of the time slot occupied by the initial channel of the first terminal is different from the second starting symbol of the first target reference signal or the first target PSCCH transmitted in the first COT, the first terminal only sends the second target PSCCH in the time slot occupied by the initial channel; When the first starting symbol of the time slot occupied by the initial channel of the first terminal is not the first symbol in a sidelink SL time slot, or the first starting symbol of the time slot occupied by the initial channel of the first terminal is different from the second starting symbol of the first target reference signal or the first target PSCCH transmitted in the first COT, the first terminal only sends the second target reference signal in the time slot occupied by the initial channel.

13. The method according to claim 12, characterized in that The method also includes: when the first terminal only sends the second target reference signal in the time slot occupied by the initial channel, the first terminal only detects the PSCCH of one candidate symbol position in one time slot when sensing the channel occupancy of other terminals.

14. The method according to claim 1, characterized in that The first terminal transmits at least one of a reference signal and a physical sidelink control channel PSCCH related to the reference signal on an unlicensed resource according to preset information or preset rules, including: The first terminal receives target configuration information including multiple reference signal resources or multiple PSCCH resources; The first terminal determines, according to the target configuration information, to transmit at least one of a reference signal and a PSCCH related to the reference signal on the unlicensed resources.

15. The method according to claim 14, characterized in that The target configuration information of the multiple reference signal resources or the multiple PSCCH resources is related to at least one of the following: Indicative information of time slots occupied by the first COT or the initial channel; Information related to the starting symbol position of the time slot occupied by the initial channel.

16. The method according to claim 14, characterized in that The target configuration information includes at least one of the following: First configuration information of a reference signal resource for transmitting the first target reference signal or the first target PSCCH in the first COT; second configuration information of one or more reference signal resources or a reference signal resource list in a time slot occupied by the initial channel; The third configuration information of one or more PSCCH resources or a PSCCH resource list in the time slot occupied by the initial channel.

17. The method according to claim 16, characterized in that The first configuration information is associated with a first symbol of a time slot.

18. The method according to claim 16, characterized in that The second configuration information is used to indicate configuration information of one or more reference signals related to a starting symbol position of initial access.

19. The method according to claim 3, characterized in that The first time-domain candidate pattern is different from the second time-domain candidate pattern including one of the following: In the case where one time slot in the first COT supports two time division multiplexing TDM reference signal resources, a TDM reference signal is not included between a start symbol and an end symbol of the second time domain candidate pattern occupied by the initial channel; In the case where a time slot within the first COT includes a PSCCH, the time slot occupied by the initial channel does not include the second PSCCH; In the case where the first time domain candidate pattern in the first COT is static, the second time domain candidate pattern of the time slot occupied by the initial channel is variable, wherein the second time domain candidate pattern is variable means that the second time domain candidate pattern is different according to the starting symbol of the time slot occupied by the initial channel; When a first time domain candidate pattern in the first COT corresponds to a determined first time domain pattern, a second time domain candidate pattern of the time slot occupied by the initial channel includes at least two second time domain patterns depending on the starting symbol of the time slot occupied by the initial channel.

20. The method according to claim 3, characterized in that In the case where the first COT supports a time slot including at least two time division multiplexing TDM reference signal resources, if the first starting symbol occupied by the initial channel is not the first symbol in a SL time slot, or the first starting symbol occupied by the initial channel of the first terminal is different from the second starting symbol of the first target reference signal or the first target PSCCH transmitted in the first COT, the TDM reference signal is not included between the starting symbol and the ending symbol of the second time domain candidate pattern occupied by the initial channel.

21. The method according to claim 19 or 20, characterized in that The candidate PSCCH positions occupied by the initial channel are smaller than the candidate PSCCH positions in the first COT, or the number of candidate reference signals occupied by the initial channel is smaller than the number of candidate reference signals in the first COT.

22. The method according to claim 19 or 20, characterized in that The symbol length of the candidate reference signal of the time slot occupied by the initial channel is smaller than the symbol length of the candidate reference signal configured in the first COT.

23. The method according to claim 1, characterized in that The first terminal sends a first target reference signal and a first target PSCCH related to the first target reference signal in a time slot within a first COT, including: The first terminal sends the first target reference signal and a first target PSCCH related to the first target reference signal in a time slot within the first COT according to a predetermined manner, wherein the predetermined manner includes at least one of the following: Sending multiple reference signals in one time slot; A reference signal is sent over a plurality of time slots within the first COT.

24. The method according to claim 23, characterized in that When the first terminal sends multiple reference signals in one time slot, at least two TDM reference signal resources are configured in the time slot, and the multiple reference signals are sent on different TDM reference signal resources.

25. The method according to claim 1 or 19, characterized in that The method further includes: in a time slot or a TDM reference signal resource that satisfies a first condition, the first terminal does not send the first target reference signal, wherein the first condition includes at least one of the following: The first terminal detects that the second terminal sends a reference signal on the reference signal resource of the time slot or TDM; The first terminal schedules the third terminal to send a reference signal on the reference signal resource of the time slot or TDM; The first terminal receives a reference signal on the reference signal resource of the time slot or TDM.

26. The method according to claim 24, characterized in that The first terminal transmitting the first target reference signal in a predetermined manner includes: When a second condition is met, the first terminal transmits the first target reference signal in the predetermined manner, wherein the second condition includes at least one of the following: The first terminal does not find other resources, wherein the other resources are reference signal resources reserved by the second terminal for COT sharing other than the reference signal resources; The first terminal does not schedule the third terminal to send a reference signal on the reference signal resource of the TDM; The first terminal does not need to receive a reference signal on the reference signal resource of the TDM.

27. The method according to claim 1, characterized in that When the first starting symbol of the time slot occupied by the initial channel of the first terminal is not the first symbol in a time slot, the time slot occupied by the initial channel does not include at least one of the following: information on the second target PSCCH and COT resources.

28. The method according to claim 27, characterized in that At least one of the following is sent in a time slot within the first COT: information of the second target PSCCH and COT resources.

29. The method according to claim 1, characterized in that The time slot where the first target reference signal is located supports at least two end positions.

30. The method according to claim 29, characterized in that A time slot within the first COT or occupied by the initial channel includes at least two candidate positions of PSCCH resources, and each candidate position of the PSCCH resource is associated with a reference signal resource immediately following the candidate position of the PSCCH resource.

31. The method according to claim 30, characterized in that In the first COT, the PSCCH resource includes two candidate starting symbol positions, wherein a first candidate starting symbol position of the two candidate starting symbol positions is a second starting symbol in a time slot.

32. The method according to claim 31, characterized in that The candidate starting symbol position of the two candidate starting symbol positions is preconfigured or related to the starting symbol of the time slot occupied by the initial channel.

33. The method according to claim 30, characterized in that The starting symbol of the second target PSCCH in the time slot occupied by the initial channel is correlated with the starting symbol of the first target PSCCH in the first COT.

34. The method according to claim 30, characterized in that In the case where the starting symbol of the second target PSCCH in the time slot occupied by the initial channel is not correlated with the starting symbol of the first target PSCCH in the first COT, The gap GP symbol in the first COT can ensure that the first target reference signal cannot be transmitted within a predetermined idle time; or, The first terminal only sends the second target reference signal in a time slot occupied by the initial channel.

35. The method according to claim 30, characterized in that The one time slot includes 4 automatic gain control AGC symbols.

36. The method according to claim 35, characterized in that The one time slot includes at least 2 cyclic prefix enhanced CPE symbols.

37. The method according to any one of claims 1 to 36, characterized in that The method further comprises: The first terminal accesses using type 2 during the first channel occupation time.

38. The method according to claim 37, characterized in that The method further includes: the first terminal sending COT resource information to the second terminal, where the COT resource information is used to indicate relevant information about the initial channel occupancy.

39. The method according to claim 28 or 38, characterized in that The COT resource information includes at least one of the following: Indicative information of a resource block set associated with a COT; The remaining duration of the COT; The channel access priority CAPC used; The resource identifier occupied; Source address of shared COT channel resources; Destination address identifier; Frequency domain information associated with COT; First indication information, where the first indication information is used to indicate that the COT channel resources support resources related to location service sharing; second indication information, where the second indication information is used to indicate a condition for sharing the COT; Indicative information within COT; COT external indication information.

40. The method according to claim 39, characterized in that The information of the COT resources is transmitted on the first target PSCCH or the second target PSCCH.

41. The method according to claim 37, characterized in that The first terminal transmitting the first target reference signal and the first target PSCCH includes: the first terminal continuously sending the first target reference signal and the first target PSCCH within the COT resources.

42. The method according to claim 3, characterized in that The method further comprises: When the first terminal is a transmitting terminal, the first terminal determines that the starting symbol position is one of the starting symbol positions of the two initial accesses by performing LBT, and determines the second time domain pattern of the second target reference signal and the second target PSCCH according to the determined starting symbol position.

43. The method according to claim 4, characterized in that The method further comprises: In the case where the first terminal is a receiving terminal, the first terminal monitors at least two PSCCH candidate time domain positions in a time slot occupied by the initial channel, and determines whether the second target reference signal and the second target PSCCH are scheduled according to the monitoring result, wherein the PSCCH candidate time domain position is determined according to one of the following: A first starting symbol position of the two initial access starting positions; The second starting symbol position of the two initial access starting positions.

44. The method according to claim 19 or 20, characterized in that The first terminal monitors one PSCCH candidate time domain position in the first COT, and the PSCCH candidate time domain position is the second symbol in a time slot.

45. The method according to any one of claims 1 to 36, characterized in that The first terminal monitors the PSCCH at the same time domain position as that in the first COT in the time slot occupied by the initial channel.

46. ​​A signal transmission device, characterized in that: include: An acquisition module, used to acquire preset information or preset rules; A transmission module, configured to transmit a reference signal and a PSCCH related to the reference signal on an unlicensed resource according to the preset information or preset rule; The transmission module transmits at least one of the reference signal and the PSCCH related to the reference signal on the unlicensed resources, including at least one of the following: Sending a first target reference signal and a first target PSCCH related to the first target reference signal in a time slot within a first channel occupation time COT; Sending at least one of a second target reference signal and a second target PSCCH associated with the second target reference signal in a time slot occupied by the initial channel; Not sending a third target reference signal and a third target PSCCH related to the third target reference signal in a time slot within the second COT; The first COT is the occupation time of a channel occupied by the device, or the occupation time of a channel shared with the device; The second COT is the channel occupation time occupied by other terminals except the device and not shared with the device.

47. A terminal, characterized in that: It includes a processor and a memory, the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the signal transmission method as described in any one of claims 1 to 45 are implemented.

48. A readable storage medium, characterized in that The readable storage medium stores programs or instructions, and when the programs or instructions are executed by the processor, the steps of the signal transmission method as described in any one of claims 1 to 45 are implemented.

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