Transmission method of sidelink reference signal and terminal

Abstract

The invention discloses a side link reference signal transmission method and a terminal, and belongs to the field of communication, and the side link reference signal transmission method comprises the steps that a first terminal sends a first reference signal in a first target frequency range of a first unauthorized resource and sends first control information in a second target frequency range, wherein the first control information is transmitted on a resource of a first PSCCH, and the resource of the first PSCCH is at least one of the following: a public PSCCH resource; and dedicated PSCCH resources are provided.

Description

Technical Field

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

[0002] The New Radio NR system supports sidelink (SL), or translated as secondary link, side link, side link and other transmissions, which are used for direct data transmission between terminal user equipment (UE) without going through network equipment, and supports unicast, multicast or broadcast transmission. In SL, the bandwidth occupied by the reference signal and the physical sidelink control channel (PSCCH) transmitted on the dedicated resource pool is different. The reference signal, such as the SL positioning reference signal (PRS), has a bandwidth of the dedicated resource pool, while the frequency domain resources of the sidelink control information (SCI), that is, the PSCCH, do not exceed the bandwidth of a subchannel. This may not meet some predetermined rules for sidelink (SL-Unlicensed, SL-U) transmission of unlicensed spectrum. Taking the occupied channel bandwidth (OCB) rule as an example, the OCB rule requires that in the unlicensed frequency band, the transmission node must occupy more than a predetermined proportion of the bandwidth during each transmission, for example, at least 70% (60GHz) or 80% (5GHz) of the bandwidth of the entire frequency band, and the frequency domain resource bandwidth of SCI, that is, PSCCH, is 1 / n of the entire frequency band, where n is greater than 2 and the maximum is 27.

[0003] It can be seen that in SL, the bandwidth occupied by the reference signal and the physical sidelink control channel (PSCCH) in the dedicated resource pool cannot meet some predetermined rules for SL-U transmission in unlicensed spectrum, such as the OCB rule. Summary of the invention

[0004] The embodiments of the present application provide a side link reference signal transmission method and terminal, which can enable SL-U transmission of unlicensed spectrum to meet predetermined rules.

[0005] In a first aspect, a method for transmitting a sidelink reference signal is provided, comprising: a first terminal sends a first reference signal on a first target frequency range of a first non-authorized resource and sends first control information on a second target frequency range, wherein the first control information is transmitted on the resources of a first PSCCH, wherein the resources of the first PSCCH are at least one of the following: a public PSCCH resource; a dedicated PSCCH resource.

[0006] According to a second aspect, a transmission device for a side link reference signal is provided, comprising: a transmission module for sending a first reference signal on a first target frequency range of a first non-authorized resource and sending first control information on a second target frequency range, wherein the first control information is transmitted on the resources of a first PSCCH, wherein the resources of the first PSCCH are at least one of: a public PSCCH resource; a dedicated PSCCH resource.

[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 communication interface is used to send a first reference signal on a first target frequency range of a first non-authorized resource and to send first control information on a second target frequency range, wherein the first control information is transmitted on the resources of a first PSCCH, wherein the resources of the first PSCCH are at least one of the following: public PSCCH resources; dedicated PSCCH resources.

[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 side link reference signal transmission method as 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 steps of the side link reference signal transmission method described in the first aspect.

[0011] In the 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 side link reference signal transmission method as described in the first aspect.

[0012] In an embodiment of the present application, a first reference signal is sent on a first target frequency range of a first unlicensed resource and first control information is sent on a second target frequency range, wherein the first control information is transmitted on resources of a first PSCCH, wherein the resources of the first PSCCH are at least one of the following: public PSCCH resources; dedicated PSCCH resources, and the bandwidth occupied by the PSCCH related to the first reference signal sent on the first target frequency range of the first unlicensed resource is adjusted, so that in the SL, the bandwidth occupied by transmitting the reference signal and the PSCCH on the dedicated resource pool can meet the predetermined rules for SL-U transmission of the unlicensed spectrum. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0014] Figure 2a It is a flow chart of a method for transmitting a side link reference signal provided in an embodiment of the present application.

[0015] Figure 2b-2j It is a schematic diagram of a side link reference signal transmission method provided in an embodiment of the present application.

[0016] Figure 3a It is a flow chart of another side link reference signal transmission method provided in an embodiment of the present application.

[0017] Figure 3b-3c It is a schematic diagram of a side link reference signal transmission method provided in an embodiment of the present application.

[0018] Figure 4a It is a flow chart of another side link reference signal transmission method provided in an embodiment of the present application.

[0019] Figure 4b-4c It is a schematic diagram of a side link reference signal transmission method provided in an embodiment of the present application.

[0020] Figure 5 It is a schematic diagram of frequency domain resource indication provided in an embodiment of the present application.

[0021] Figure 6 It is a structural diagram of a transmission device for a side link reference signal provided in an embodiment of the present application.

[0022] Figure 7 It is a schematic diagram of the hardware structure of a terminal provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] 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.

[0024] The terms "first", "second", etc. in this 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 this 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.

[0025] 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.

[0026] 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 the 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.

[0027] Figure 1A block diagram of a wireless communication system applicable to an embodiment of the present application is shown. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), 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), an augmented reality (Augmented Reality, AR), a virtual reality (Virtual Reality, VR) device, a robot, a wearable device (Wearable Device), an aircraft (flight vehicle), a vehicle-mounted device (Vehicle User Equipment, VUE), a ship-mounted device, a pedestrian terminal (Pedestrian User Equipment, PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, televisions, washing machines or furniture, etc.), a game console, a personal computer (Personal Computer, PC), a teller machine or a self-service machine and other terminal side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is 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 (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 (Wireless Local Area Network, WLAN) access point (Access Point, AS) or a wireless fidelity (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, 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.

[0028] The core network device may include, but is not limited to, at least one of the following: a core network node, a core network function, a mobility management entity (Mobility Management Entity, MME), an access mobility management function (Access and Mobility Management Function, AMF), a session management function (Session Management Function, SMF), a user plane function (User Plane Function, UPF), a policy control function (Policy Control Function, PCF), a policy and charging rules function unit (Policy and Charging Rules Function, PCRF), an edge application service discovery function (Edge Application Server Discovery Function, EASDF), a unified data management (Unified Data Management, UDM), a unified data storage (Unified Data Repository, UDR), a home user server (Home Subscriber Server, HSS), a centralized network configuration (CNC), a network storage function (Network Repository Function, NRF), a network exposure function (Network Exposure Function, NEF), a local NEF (Local NEF, or L-NEF), and a binding support function (Binding Support Function, BSF), application function (Application Function, AF), etc. It should be noted that in the embodiment 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.But 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.

[0029] The following describes in detail the side link reference signal transmission method provided by the embodiment of the present application through some embodiments and application scenarios in combination with the accompanying drawings.

[0030] Figure 2a A method for transmitting a side link reference signal provided in an embodiment of the present application is as follows: Figure 2a As shown, the method includes:

[0031] S202: The first terminal sends a first reference signal in a first target frequency range of a first unlicensed resource and sends first control information in a second target frequency range.

[0032] The first control information is transmitted on a resource of a first PSCCH, wherein the resource of the first PSCCH is at least one of the following:

[0033] Public PSCCH resources;

[0034] Dedicated PSCCH resources.

[0035] In an optional embodiment, the frequency domain resources of PSCCH do not exceed one subchannel. Optionally, this step can be applied to a dedicated resource pool that only sends SL PRS and PSCCH. The first reference signal may include: a first SL positioning reference signal (Positioning reference signal, PRS), a SL channel state information (Channel State Information, CSI) reference signal (Reference Signal, RS), such as a reference signal related to an FR2 beam. The first control information may be, for example, an SCI.

[0036] In another optional embodiment, the frequency domain resource of PSCCH is a subchannel. Optionally, this step can be applied to a dedicated resource pool that only sends SL PRS and PSCCH. The first reference signal may include: a first SL positioning reference signal (PRS), a SL channel state information (CSI) reference signal (RS), such as a FR2 beam-related reference signal.

[0037] In another optional embodiment, the frequency domain resources of the PSCCH are multiple subchannels. For example, the common PSCCH resources occupy one or more subchannels, or the common PSCCH resources and the dedicated PSCCH resources each occupy one subchannel. Figure 2i-1 As shown, the total frequency domain resources occupied by PSCCH in a resource pool (the resource pool includes one or more resource sets (RB sets)) are not greater than two subchannels, and the two 22 are two consecutive N PRBs, N is greater than 1, such as N is equal to the size of 1 subchannel or 1 / 2 subchannel. The frequency domain resources of 1 subchannel can be mapped to M consecutive PRBs in a resource pool, the 22 is a common PSCCH resource, and the 21 is an example of multiple dedicated PSCCH resources Figure 2i-2It indicates that each RB-SET includes a common resource, wherein resource 22 may represent a common resource. Resource 21 is an example of multiple dedicated PSCCH resources.

[0038] Optionally, this step may be applicable to a dedicated resource pool that only sends SL PRS and PSCCH. The first reference signal may include: a first SL positioning reference signal (PRS), a SL channel state information (CSI) reference signal (RS), such as a reference signal related to the FR2 beam. Figure 2b As shown, 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, that is, the frequency domain resources of PSCCH does not exceed the size of 1 subchannel or is the size of 1 subchannel. For example, the frequency domain resources of PSCCH are 1 / n of the bandwidth of the dedicated resource pool. If the dedicated resource pool is 100PRB, the frequency domain resources of PSCCH are 10PRB, then n = 10. Directly multiplexing SCI to transmit on the frequency domain resources of PSCCH does not meet some predetermined rules, such as the OCB rule, that is, the requirement to occupy 80% of the frequency domain resources on the listen before talk (LBT) subband on the unlicensed band.

[0039] In this step, the resources of the first PSCCH include common PSCCH resources and / or dedicated PSCCH resources.

[0040] In the case where the first PSCCH resources include common PSCCH resources, it is possible to transmit the first PSCCH to the public PSCCH (such as Figure 2d As shown), adjust the bandwidth occupied by sending the first control information on the second target frequency range of the first unlicensed resource, so that in the SL, the bandwidth occupied by transmitting the reference signal and PSCCH on the dedicated resource pool can meet the predetermined rules of SL-U transmission of the unlicensed spectrum. For example, by setting the public PSCCH resources, the PSCCH resources occupy 80% of the frequency domain resources on the subband as a whole to meet the OCB rules. It is worth noting that Figure 2dis an example of the public PSCCH resource. In the case where the resources of the first PSCCH include dedicated PSCCH resources, optionally, if the first PSCCH is a dedicated PSCCH resource, the time slot for transmitting the first PSCCH includes public PSCCH resources, and optionally, the dedicated resource pool includes two types of PSCCH resource configurations, one is a public PSCCH resource, and the other is a dedicated PSCCH resource. However, in a time slot, not all terminals that send the first reference signal in this time slot need to send public resources. Optionally, the terminal occupying the time slot or the terminal designated by the terminal occupying the time slot needs to send information related to the channel occupancy time on the public resources of the time slot. That is, if the first terminal only sends the first reference signal and the control information carried on the dedicated PSCCH in a time slot, it can be understood that the public PSCCH resources are used for other terminals to indicate the relevant information of the channel occupancy time COT. In other words, the above-mentioned public PSCCH can be sent by terminal A to meet the OCB rule, and the resources of the first PSCCH sent by terminal B include dedicated PSCCH resources.

[0041] In the case where the first PSCCH resource includes a dedicated PSCCH resource, optionally, if the first PSCCH is a dedicated PSCCH resource, the frequency domain resource of the dedicated PSCCH is X interleaved resources; X is an integer greater than or equal to 1, and the dedicated resources that can be interleaved (such as Figure 2c As shown, 1 interleaved resource, adjacent resources of the interleaved resource are spaced Y PRBs apart, and the bandwidth occupied by sending the first control information on the second target frequency range of the first unlicensed resource is adjusted so that in the SL, the bandwidth occupied by the symbols of the reference signal and PSCCH transmitted on the dedicated resource pool can meet the predetermined rule of SL-U transmission of the unlicensed spectrum. For example, corresponding to the OCB rule, 80% of the frequency domain resources on the subband can be occupied by the transmission of the interleaved resource to meet the OCB rule.

[0042] In the case where the first PSCCH resources include common PSCCH resources and dedicated PSCCH resources (such as Figure 2d or Figure 4b ), the public PSCCH resources and dedicated PSCCH resources occupy 80% of the frequency domain resources on the subband as a whole to meet the OCB rule. In one implementation, Figure 2e As shown, UE 2 receives SL PRS1 and the associated SCI sent by UE1 in a slot, wherein the SCI indicates that UE2 needs to send SL PRS, such as the SCI includes an SL PRS request message. And, the COT resource of the first terminal is shared with the second terminal. The first terminal sends the second control information to the second terminal, and the second control information includes the relevant information of the COT

[0043] In an implementation manner, the second control information includes associated information of the first reference signal, and the associated information of the first reference signal includes at least one of the following:

[0044] Resource identification;

[0045] Destination address identifier;

[0046] a request message for the first reference signal;

[0047] Cast type;

[0048] priority information of the first reference signal;

[0049] Bandwidth information;

[0050] Resource pool information;

[0051] Time-frequency resource indication information.

[0052] Combination Figure 2e and Figure 2f As shown, for example, for single-sided and double-sided radio transmission technologies (RTT), the sent SL PRS and the received SL PRS can use the same LBT; or the sent SL PRS and the received SL PRS use a shared COT. Further, where the LBT to the resource UE1 indicates the resource shared or reserved for UE2, the associated information of the first reference signal includes at least one of the following information

[0053] i.ID of UE 2;

[0054] ii.SL PRS resource ID;

[0055] iii.PSCCH resource ID;

[0056] iv. The time domain location of SL PRS transmission;

[0057] v. In an optional embodiment, if multiple resources reserved for the UE 2 are included, the SCI includes two time domain resource allocations (TDRA), the first TDRA is used to indicate the resources sent by UE1, and the second TDRA is used to indicate the resources reserved for UE 2.

[0058] vi. In an optional embodiment, if multiple resources reserved for the UE 2 are included, the SCI includes indication information of two SL PRS resources, the indication information of the first SL PRS resource is used to indicate the resources sent by UE1, and the indication information of the second SL PRS resource is used to indicate the resources reserved for UE 2.

[0059] vi. In an optional embodiment, if multiple resources are reserved for the UE1, the SCI includes indication information of two SL PRS resources.

[0060] In an implementation manner, the second control information further includes association information of a second reference signal sent by the second terminal, and the association information of the second reference signal includes at least one of the following:

[0061] The second terminal sends frequency domain resource indication information of a second reference signal;

[0062] a resource identifier of the second terminal;

[0063] The destination identifier of the second terminal.

[0064] In one implementation, the bandwidth of the first reference signal is a frequency domain resource perceived by the LBT or a frequency domain resource indicated by a first dedicated resource pool. The first dedicated resource pool includes one or N resource block sets.

[0065] In one implementation, when the bandwidth of the first reference signal is a frequency domain resource indicated by the first dedicated resource pool, when the first dedicated resource pool includes one or more resource block sets and there is a resource block set LBT failure, it is determined that the first dedicated resource pool LBT fails; that is, the SL PRS cannot be sent on the reserved resources;

[0066] When the bandwidth of the first reference signal is the first target frequency domain resource perceived by LBT, and the first target frequency domain resource belongs to the frequency domain resource indicated by the dedicated resource pool, and when the first dedicated resource pool includes multiple resource block sets and LBT of at least one resource block set is successful, the resource block set of the first dedicated resource pool where LBT is successful is determined to be the first target frequency domain resource, and the first reference signal is sent on the at least one resource block set where LBT is successful. The SL PRS is only sent on the RB set where LBT is successful.

[0067] In one implementation, the frequency domain resources of the COT may be indicated by the resources of the first PSCCH or the common PSCCH resources.

[0068] In one implementation, the first PSCCH corresponds to a target object, and the target object includes: an interleaving position, a position of the first reference signal, or an identifier of the first reference signal.

[0069] In one implementation, the dedicated PSCCH corresponds to a target object, and the target object includes: an interleaving position, a position of the first reference signal, or an identifier of the first reference signal.

[0070] In one implementation, the identifier of the first PSCCH corresponds one-to-one with the identifier of the first reference signal.

[0071] Furthermore, in a case where the identifier of the first PSCCH corresponds one-to-one with the identifier of the first reference signal, the identifier of the first PSCCH is determined according to at least one of the following:

[0072] candidate resources of the first reference signal;

[0073] candidate resources of the first PSCCH;

[0074] combsize;

[0075] In one implementation, the identifier of the first PSCCH corresponds to the Z interleaved resources one by one, and Z is a positive integer greater than or equal to 1.

[0076] Furthermore, in a case where the identifier of the dedicated PSCCH corresponds one-to-one with the identifier of the first reference signal, the identifier of the dedicated PSCCH is determined according to at least one of the following:

[0077] candidate resources of the first reference signal;

[0078] candidate resources of the first PSCCH;

[0079] combsize;

[0080] In one implementation, the identifier of the first PSCCH corresponds to the Z interleaved resources one by one, and Z is a positive integer greater than or equal to 1.

[0081] Optionally, the mapping rule is a protocol agreement, such as PSCCH 0 corresponds to SL PRS 0; PSCCH 1 corresponds to SL PRS1; PSCCH id = mod(SL PRS ID, X), where X is min{SL PRS candidate resources, PSCCH candidate resources}, or X is calculated based on combsize N and / or TDM candidate resources, or X is the maximum value of the pre-configured SL PRS candidate resources.

[0082] In one implementation, when the identifier of the first PSCCH corresponds one-to-one to the Z interleaved resources, the number of candidate resources for the first PSCCH is determined according to the floor(M / Z) function, where M is the number of determined interleaved resources within the second frequency domain.

[0083] The first frequency domain range includes at least one of the following:

[0084] A frequency domain range included in the first dedicated resource pool;

[0085] One or a set of N3 resource blocks in the first dedicated resource pool, where N1 is less than or equal to the N.

[0086] Optionally, the number of candidate resources for the first PSCCH = floor (M / Z).

[0087] Optionally, the number of candidate resources for the first PSCCH = floor(M / Z) + constant C.

[0088] In one implementation, in a one-to-many situation where the identifier of the first PSCCH and the Z interleaving resources are one-to-many, the PSCCH resources select corresponding interleaving resources in sequence or randomly.

[0089] In one implementation, in the case where the identifier of the dedicated PSCCH is one-to-many with the Z interleaving resources, the PSCCH resource selects the corresponding interleaving resource in sequence or randomly.

[0090] In one implementation, when there is a many-to-one relationship between the identifier of the first PSCCH and the Z interleaved resources, some of the PSCCH resources may not be transmitted in the current slot.

[0091] In one implementation, when there is a many-to-one relationship between the identifier of the dedicated PSCCH and the Z interleaved resources, some of the PSCCH resources may not be transmitted in the current slot.

[0092] In one implementation, in a case where there is a one-to-many correspondence between the identifier of the first PSCCH and Z of the interleaved resources, the identifier of the first PSCCH is determined based on at least two of the identifier of the interleaved resources, Z, candidate PSCCH resources and candidate first reference signal resources.

[0093] In the case where there is a one-to-many correspondence between the identifier of the dedicated PSCCH and the Z interleaved resources, the identifier of the dedicated PSCCH is determined based on at least two of the identifier of the interleaved resources, Z, candidate PSCCH resources and candidate first reference signal resources.

[0094] For example, PSCCH resource 0 is mapped to Z consecutive interlace resources, where mod(interlace resource ID / Z, candidate PSCCH resource)=PSCCH resource ID, such as M=10, Z=2; candidate PSCCH resource=5, the PSCCH ID=0 is mapped to interlace resource IDs 0 and 1, and for another example, the PSCCH ID=1 is mapped to interlace resource IDs 2 and 3.

[0095] Similarly, in the case where the identifier of the dedicated PSCCH corresponds one-to-one to the Z interleaved resources, the identifier of the dedicated PSCCH may also be determined based on the identifier of the interleaved resources, the Z and the candidate PSCCH resources.

[0096] In one implementation, the interval between the multiple interlace resources is determined according to the M and the Z. For example, PSCCH resource 0 is mapped to Z interlace resources, wherein the adjacent interlace resources are spaced by floor(M / Z) resources. Wherein, mod(interlace resource ID, candidate PSCCH resource) = PSCCH resource ID is satisfied, for example, M = 10, Z = 2; candidate PSCCH resource = 5, the PSCCH ID = 0 is mapped to interlace resource IDs 0 and 5, and for another example, the PSCCH ID = 1 is mapped to interlace resource IDs 1 and 6.

[0097] In one implementation, if the common PSCCH resource and the dedicated PSCCH resource are included in a time slot, the common PSCCH resource and the dedicated PSCCH resource have different frequency domain locations.

[0098] The frequency domain resources of the common PSCCH include at least one of the following:

[0099] One or more specified subchannel or frequency domain positions in the resource pool;

[0100] N3 specified subchannels or frequency domain positions in the N3 resource sets in the resource pool;

[0101] X2 interleaved resources in the resource pool;

[0102] X3 interleaved resources in the N3 resource sets in the resource pool;

[0103] In one implementation, if the frequency domain resources of the common PSCCH are one or more specified subchannels or frequency domain positions in the resource pool, it can be understood that, in one case, the terminal can only use the frequency domain resources of the common PSCCH as defined relative to the resource pool when the LBT resource is the resource set included in a resource pool.

[0104] In one implementation, if there are N3 designated subchannels or frequency domain positions in the N3 resource sets in the resource pool, it can be understood that if the resource pool includes N1 resource sets, the common PSCCH resources must be sent on the N1 resource sets to ensure that the receiving terminal can receive the common PSCCH. Or the terminal only succeeds in LBT in N3 resource sets, where N3<=N1, then the common PSCCH must be sent on the N3 resource sets where the LBT is successful, and the positions for sending the common PSCCH on the N3 resource sets are (pre) designated or (pre) configured.

[0105] In one implementation, there are X2 interleaved resources in the resource pool, the common PSCCH is mapped to the interleaved resources, and the interleaved resources are configured based on the first dedicated resource pool.

[0106] In one implementation, the frequency domain position of the dedicated PSCCH resource is determined by the frequency domain position of the terminal excluding the frequency domain position occupied by the above-mentioned public PSCCH resource in the second target frequency range, or by the frequency domain position of the resource set excluding the frequency domain position occupied by the public PSCCH resource. In other words, the frequency domain position of the dedicated PSCCH resource is determined according to the first position or the second position. Among them, the first position is the frequency domain position occupied by the first terminal in the second target frequency range excluding the public PSCCH resource, and the second position is the frequency domain position occupied by the public PSCCH resource on the resource set included by the first PSCCH.

[0107] In one implementation, the identifier of the dedicated PSCCH resource satisfies at least one of the following:

[0108] is associated with a subchannel sequence at the first position;

[0109] is related to a subchannel sequence on the resource set excluding a frequency domain position occupied by the common PSCCH resource;

[0110] corresponding to the Z interleaved resources in the second target frequency range excluding the common PSCCH resources;

[0111] Corresponding to the identifiers of the Z interleaved resources excluding the frequency domain position occupied by the common PSCCH resource on the resource set.

[0112] In one implementation, the first PSCCH or the dedicated PSCCH carries resource reservation and indication information, wherein the resource reservation and indication information includes at least one of the following:

[0113] The third indication information is used to indicate that resources support sharing of positioning. For example, a UE that sends SLprs can share the COT, and a UE that has reserved the COT resource can continue to use the COT resource to send SL PRS.

[0114] Fourth indication information, where the fourth indication information is used to indicate a condition for sharing the COT;

[0115] Indicating resource identifiers; wherein the indicating resource identifiers include one or more, which may indicate currently occupied resources or, in combination with the first resource indication information, a resource identifier of a first reference signal in a reserved time slot; or a resource identifier of a first PSCCH in a reserved time slot;

[0116] Destination address identifier of shared COT resources;

[0117] The terminal identifier of the terminal associated with the resource reservation and indication information;

[0118] First resource indication information, the resource indication information is used to indicate resources reserved for the first terminal; wherein the first resource indication information includes at least one of frequency domain indication information, such as a frequency domain resource indication value (frequency resource indication value, FRIV) or time domain indication information, such as a time domain resource indication value (time resource indication value, TRIV);

[0119] Second resource indication information, the second resource indication information is used to indicate repeated transmission on the resource; the second resource indication information includes at least one item such as whether to repeat the transmission, the number of repeated transmissions, etc.;

[0120] The third resource indication information is used to indicate the continuous occupation of resources. For example, if each slot of the COT needs to be sent, no further indication is required, or 1 bit is used to indicate the need for continuous sending.

[0121] Optionally, all response resources except the indication need to be sent, and no additional bit indication is required; for example, if the frequency domain resources are fixed, no additional indication is required, or the frequency domain resource information can be obtained based on common resources, and there is no need to indicate it in the PSCCH.

[0122] second reference signal request indication information, where the second reference signal request indication information is used to request sending of the second reference signal, wherein the second reference signal is a signal received by the first terminal or a signal that the first terminal expects other terminals to send;

[0123] priority information of the first reference signal.

[0124] In one implementation, the first PSCCH includes a common PSCCH resource and a dedicated PSCCH resource, and the first control information includes COT related information, and the COT related information includes at least one of the following:

[0125] The remaining duration of the COT;

[0126] The CAPC used;

[0127] The resource identifier occupied;

[0128] The occupied destination address identifier;

[0129] Frequency domain information associated with COT; frequency domain information associated with COT, such as a first target frequency range, or a second target frequency range; for example, frequency domain information corresponding to an RB set, such as N bits used to indicate the occupied RB set; or indicating whether the resources received by LBT are per RB, per resource pool, or per BWP;

[0130] The fifth indication information is used to indicate that the COT channel resources support the sharing of resources related to the positioning service; for example, the UE sending the SL PRS can share the COT, and the UE that has reserved the COT resources can continue to use the COT resources to send the SL PRS;

[0131] The sixth indication information is used to indicate a condition for sharing the COT.

[0132] In one implementation, when the duration of sending the first reference signal or the first PSCCH to send SCI is less than the first time threshold, the type of listen-before-talk LBT is determined. For example, when the duration of sending the first SL PRS and / or SCI is less than the first time threshold, such as 584us or 1ms, in the case, the UE adopts the second type of LBT method, such as 2A, 2B, 2C. Optionally, the duration of the UE sending the SL PRS accounts for <20% of the period

[0133] In one implementation, before the first terminal sends a first reference signal related to a target frequency range beam on a first unlicensed resource and sends a first control information on a second target frequency range, it also includes: judging whether the perceived resource is in an idle state (idle) by the LBT. The idle state is a state in which the reference signal received power (RSRP) is less than the received power threshold within a predetermined time. The time interval for sensing resources is, for example, 25us, 16us, 0us, etc.

[0134] In one implementation, the first unlicensed resource is before or after a target resource, and the target resource is a resource used by other terminals other than the first terminal to transmit a sidelink reference signal. The target resource belongs to a shared channel occupied by other UEs.

[0135] Figure 3a A method for transmitting a side link reference signal provided in an embodiment of the present application is as follows: Figure 3a As shown, the method includes:

[0136] S301: If the first PSCCH is a dedicated PSCCH resource, the frequency domain resources of the dedicated PSCCH are X interleaved resources, and the first PSCCH is mapped to the X interleaved resources.

[0137] Adjacent resources of the interleaved resources are spaced apart by Y physical resource blocks (PRBs), where Y is an integer greater than 0.

[0138] Combination Figure 2c As shown, the total frequency domain resources occupied by PSCCH are no more than one subchannel, and the frequency domain resources of one subchannel can be mapped to X interlace resources, such as Figure 2c Represents an interlace resource, where adjacent resources belonging to an interlace resource (such as Figure 2c Resource 21 is an interlace resource, and adjacent resources 21 are separated by Y physical resource blocks (PRBs), where Y is an integer greater than 0.

[0139] Figure 2g As shown, the total frequency domain resources occupied by PSCCH are no more than one subchannel, and the frequency domain resources of one subchannel can be mapped to X interlace resources, such as Figure 2g Indicates two interlace resources, where adjacent resources belonging to one interlace resource (such as Figure 2g Resource 21 is an interlace resource, and adjacent resources 21, or resource 22 is another interlace resource, and adjacent resources 22) are separated by Y physical resource blocks (PRBs), where Y is an integer greater than 0. The two adjacent resources of the interlace resources (such as adjacent resources 21 and resource 22 in FIG. g) are separated by Y1 physical resource blocks or Y2 physical resource units.

[0140] Combination Figure 2h-1 and Figure 2h-2 As shown, the total frequency domain resources occupied by PSCCH in a resource set (RB set) is not greater than one subchannel, and the frequency domain resources of the subchannel can be mapped to X interlace resources of the resource set (RB set), such as Figure 2h-1 and Figure 2h-2 The target frequency domain resource indicating the first reference signal includes multiple resource sets (such as Figure 2h-1 and Figure 2h-2 The PSCCH needs to be mapped on each resource set (RB set). The index of the mapped interlace resources in the different resource sets (RB sets) is the same, and they are all interlaced resources 21 and 22. Figure 2h-1 In , resource 21 and resource 22 are indexed separately in their respective RB sets. Figure 2h-2 In the example, resource 21 and resource 22 are indexed in two RB sets, such as indexed in the second target frequency resource or dedicated resource pool. Figure 2h-1 and Figure 2h-2 It can also be extended to include the guard band diagram of the RB set, such as Figure 2j In combination, the first reference signal may also be sent on a guard band (GP).

[0141] S302: The first terminal sends a first reference signal in a first target frequency range of a first unlicensed resource and sends first control information in a second target frequency range.

[0142] This step can be done using Figure 2a The description of step S202 of the embodiment will not be repeated for the repeated parts.

[0143] In one implementation, the first target frequency range and the second target frequency range both belong to a first bandwidth part (Bandwidth Part, BWP), wherein the first BWP is configured or preconfigured as interleaved PSCCH-based and / or interleaved physical sidelink shared channel (PSSCH)-based transmission. Preconfiguration means that there is no actual transmission of configuration signaling, but it is burned into the chip when the device leaves the factory.

[0144] In one implementation, the first BWP includes one or more first dedicated resource pools, wherein the first dedicated resource pool includes one or N resource block sets (Resource Block Set, RB set), wherein a guard band is included between adjacent resource block sets, and N is an integer greater than 1.

[0145] In one implementation, the first target frequency range includes at least one of the following:

[0146] A frequency domain range included in the first dedicated resource pool;

[0147] One or N1 resource block sets in the first dedicated resource pool, where N1 is less than or equal to the N, and the N1 resource block set LBT succeeds.

[0148] In one implementation, the resource block sets among the N resource block sets except the N1 resource block set are resource block sets where LBT fails.

[0149] Optionally, the first reference signal does not need to be interleaved to meet the OCB requirement. In this case, the measurement and analysis of the first reference signal are relatively simple.

[0150] In one implementation, the first reference signal is continuously transmitted over a first target frequency range, and the first target frequency range also includes one or more resource block sets in the first dedicated resource pool and a guard band between the multiple resource block sets. The continuous transmission can be understood as continuous RE transmission, or a comb-like transmission with the same interval (combsize), such as 2, 4, 6, 8, or 12 REs are transmitted continuously. In the case where the first resource pool includes one or more RB sets, the guard band between the RB sets can be used for SL PRS transmission. It should be noted that, in an optional case, if the guard band is not an integer multiple of the combsize (such as Figure 2j ), the first reference signal is continuously sent over the first target frequency range, that is, the first reference signal is sent using the same RE interval on different RB sets, and the comb size of the interval is always maintained, for example, 2, 4, 6, 8, 12 REs are sent continuously. The starting RE offset on each RBset may be different (as shown in the figure, the RE offset on RB set 0 is 0, and the REoffset on RB set 1 is 2). Further, when the first reference signal includes multiple RB sets, a positioning reference signal resource may include multiple RE offsets, and each RE offset may be defined based on the RB set. Furthermore, if a PSCCH resource and a first reference signal have a mapping relationship, and the PSCCH resource is defined or indexed based on the RB set, the first reference signal resource indexes mapped by the PSCCH with the same index are the same or different. If the first reference signal resource indexes mapped by the PSCCH with the same index are the same, the RE offsets of the first reference signal resources with the same index on different RB sets may be different.

[0151] In one implementation, the first reference signal is continuously transmitted over the first target frequency range, and the first target frequency range includes a guard band between multiple resource block sets. The first reference signal can be transmitted over the guard band, but the first PSCCH cannot be transmitted. It can be understood that the first reference signal is the guard band between multiple resource block sets included in the first target frequency range, and the first PSCCH is the second target frequency range, and the second target frequency range does not include the guard band. The advantage of this is that it can be combined with LBT based on RBset as the minimum unit, so that transmission can be flexibly switched on only one RB set or multiple RBsets.

[0152] In one implementation, the first reference signal and the first PSCCH are continuously sent over a first target frequency range, and the first target frequency range includes a guard band between multiple resource block sets, which can be understood as the first target frequency range being the second target frequency range. Optionally, the first PSCCH and the first reference signal are both defined or indexed based on a resource pool, which has the advantage that unified resource scheduling can be performed within a resource pool, and scheduling configuration is simpler.

[0153] In one implementation, the first reference signal is continuously transmitted over a first target frequency range, the first target frequency range does not include a guard band between multiple resource block sets, and the guard band prohibits the transmission of the first PSCCH, wherein the first reference signal is configured in a first resource pool, the bandwidth of the first reference signal is the bandwidth of the first resource pool, and the first resource pool includes multiple resource block sets. When the first resource includes one or more RB sets, the guard band between the RB sets cannot be used for PSCCH transmission.

[0154] In one implementation, the first reference signal is sent in an interleaved manner over a first target frequency range, wherein the subchannels of the first target frequency range are mapped one-to-one with the interleaved resources or one-to-many with the subchannels of the first target frequency range. This implementation requires interleaving the generated first reference signal sequence, which may bring certain difficulties to the measurement of the first reference signal, but if the associated target control information (PSCCH) is also sent in an interleaved manner, it is processed in the same manner as the PSCCH.

[0155] In one implementation, the first target frequency range and the second target frequency range both belong to a first bandwidth part BWP, wherein the first bandwidth part BWP is configured or preconfigured as a PSCCH based on continuous RB mapping and / or a first reference signal transmission based on continuous RB mapping, that is, the first BWP is an interleaving-based BWP.

[0156] In one implementation, the first PSCCH is transmitted in an interleaved manner over the first target frequency range. Figure 2c There are multiple related examples, which will not be described one by one again. The benefit of this implementation is that the OCB problem of the PSCCH is solved, and the first reference signal does not need to be interleaved, which simplifies the measurement of the first reference signal and better guarantees the performance of the first reference signal measurement. That is, if the first reference signal is interleaved, the interval of REs sent by the first signal may be different due to the influence of interlace resources, further leading to performance degradation.

[0157] In one implementation, the common PSCCH resource or the dedicated PSCCH resource is sent interleaved on the second target frequency range. It should be noted that if the first PSCCH includes common PSCCH resources and dedicated PSCCH resources, in fact, as long as there is a PSCCH resource, that is, one of the common PSCCH resource and the dedicated PSCCH resource is interleaved, the OCB requirement can be met. Therefore, the scheme includes: the common PSCCH resource is an interleaved resource, or the dedicated PSCCH resource is an interleaved resource.

[0158] In fact, from the implementation point of view, if the first PSCCH includes common PSCCH resources and dedicated PSCCH resources, a better solution is that the common PSCCH resources and dedicated PSCCH resources are not interleaved, because through multiple resources (such as Figure 2d ) itself can solve the OCB problem. So if the first PSCCH includes public PSCCH resources and dedicated PSCCH resources, the public PSCCH resources or the dedicated PSCCH resources are sent on continuous RBs in the first target frequency range. This is an optional solution, which can better reduce the complexity of PSCCH resource analysis.

[0159] From the perspective of robustness, if the first PSCCH includes common PSCCH resources and dedicated PSCCH resources, where one of the common PSCCH resources and the dedicated PSCCH resources is interleaved, and it can no longer be guaranteed that the first PSCCH sends common PSCCH resources and dedicated PSCCH resources in each slot, it can have better robustness.

[0160] In one implementation, the first PSCCH includes at least one of a common PSCCH resource and a dedicated PSCCH resource. It can be understood that the first PSCCH includes a common PSCCH resource and a dedicated PSCCH resource in any slot, or in some slots, the first PSCCH only includes a dedicated PSCCH resource. Alternatively, the common PSCCH resource and the dedicated PSCCH resource are always defined or (pre)-configured based on time slots, but not necessarily every slot has the common PSCCH resource occupied or transmitted. Or it can be understood that only terminals that need to send specific information, such as terminals sending COT sharing information, need to use the common PSCCH resource. The dedicated PSCCH resource is used to carry or associate information related to the first reference signal, and each terminal that needs to transmit the first reference signal needs to send it. That is to say, within a slot, perhaps only one or some terminals need to use the common PSCCH resource to transmit the common PSCCH, but any terminal that needs to send the first reference signal needs to use a dedicated PSCCH resource to transmit the dedicated PSCCH (for indicating information about its own first reference signal). Optionally, there is only one or K1 common PSCCH resources in a resource pool or an RB set; there are K2 common PSCCH resources in a resource pool or an RB set; K1 < K2. In one implementation, the frequency-domain resources of the first PSCCH are mapped to at least one of the following frequency-domain ranges:

[0161] A sub-channel of a second target frequency range;

[0162] N1 sub-channels on N1 resource block sets of a second target frequency range;

[0163] Multiple PRBs with a predetermined frequency-domain interval on a second target frequency range;

[0164] Multiple PRBs with a predetermined frequency-domain interval on each resource block set of a second target frequency range.

[0165] In one implementation, the second target frequency range includes at least one of the following:

[0166] The frequency-domain range included in a first dedicated resource pool;

[0167] One or N2 resource block sets in a first dedicated resource pool. The N2 is an integer greater than 1. The N2 can be equal to the above N. That is, the first target frequency range is one or N1 resource block sets in the same dedicated resource pool; but the second frequency range is N resource block sets in the same dedicated resource pool. Among them, the second target frequency range is less than or equal to the first target frequency range.

[0168] Optionally, the first dedicated resource pool may include one or N resource block sets, wherein a guard band is included between adjacent resource block sets, and N is an integer greater than 1. The resource block sets among the N resource block sets except the N1 resource block set are resource block sets with LBT failure.

[0169] In one implementation, when the frequency domain resources of the first PSCCH are mapped to N1 subchannels on N1 resource block sets in the second target frequency range, at least one of the following is satisfied:

[0170] The information carried by the first PSCCH is repeatedly sent on the N1 resource block sets;

[0171] The N1 subchannels have the same resource block interval;

[0172] The N1 subchannels have the same subchannel index;

[0173] If the N1 subchannels have the same subchannel index, the subchannel index is indexed based on the resource block set to which it belongs. Figure 2c As shown, the interlace resource for actually transmitting PSCCH is resource 21, and the blank resource is a different interlace resource. Two adjacent resources 21 are separated by A resource blocks, such as 4 resource blocks in the figure. The OCB problem is solved by adjusting the value of A.

[0174] Optionally, the SL PRS is mapped one-to-one with the PSCCH interlaced resources. The interlaced resources of the PSCCH are related to the resource identifier (ID) of the PSCCH and / or the interlaced resource block index, such as Figure 3b As shown, PSCCH1 is mapped to the first resource 21 of each A interlace, and other UEs occupy other resources, namely PSCCH2-PSCCH4. Thus, the OCB rule can be met, the occupied resources can be utilized, and the frequency division multiplexing of UE can be realized, thereby improving resource utilization.

[0175] SL PRS resources include one or more of the following information:

[0176] SL PRS resource ID;

[0177] Comb size N and RE offset;

[0178] The starting symbol and the number of consecutive symbols of SL PRS;

[0179] Frequency domain resource indication information, such as LBT subband indication information or resource set indication information.

[0180] If the SL PRS resource is defined in relation to the RB set, the SL PRS resource includes one or more of the following information:

[0181] SL PRS resource ID;

[0182] The starting symbol and the number of consecutive symbols of SL PRS;

[0183] RB set 0

[0184] {Comb size N and RE offset 0;}

[0185] RB set 1

[0186] {Comb size N and RE offset 1;}

[0187] Frequency domain resource indication information, such as LBT subband indication information or resource set indication information.

[0188] In the above case, RE offset is defined or determined per RB set.

[0189] If the SL PRS resource is defined or indexed on an RB set, the indexes of the SL PRS resources defined on different RB sets are repeated periodically. In an optional embodiment, the same SL PRS index has different RE offsets on different RB sets, and other configurations, such as Comb size N, the start symbol and the number of consecutive symbols of the SL PRS are the same. That is, if the guard band is not an integer multiple of the combsize (such as Figure 2j), the first reference signal is continuously sent over the first target frequency range, that is, the first reference signal is sent using the same RE interval on different RB sets, and the comb size of the interval is always maintained, for example, 2, 4, 6, 8, 12 REs are sent continuously. The starting RE offset on each RB set may be different (as shown in the figure, the RE offset on RB set 0 is 0, and the REoffset on RB set 1 is 2). Further, when the first reference signal includes multiple RB sets, a positioning reference signal resource may include multiple RE offsets, and each RE offset may be defined based on the RB set. Furthermore, if a PSCCH resource and a first reference signal have a mapping relationship, and the PSCCH resource is defined or indexed based on the RB set, the first reference signal resource indexes mapped by the PSCCH with the same index are the same or different. If the first reference signal resource indexes mapped by the PSCCH with the same index are the same, the RE offsets of the first reference signal resources with the same index on different RB sets may be different.

[0190] like Figure 3c The different SL PRS resources shown are different frequency domain resources or time domain resources. In an optional embodiment, the SL PRS is mapped in a PRB, and different SL PRS are mapped to different resource element (RE) offsets. Optionally, there is a mapping relationship between the PSCCH interlace resources and the SL PRS resource IDs. For example, the index of the PSCCH interlace resources is the same as the SL PRS resource ID; for example, the PSCCH interlace resource index is mod(SL PRS index, M)+K (where k can be a constant or 0, and when it is 0, it can be considered as =mod(SL PRS index, M)), M is the maximum number of PSCCH interlace resources; for example, SL PRS index = mod(PSCCH interlace resources, N)+K, N is the maximum number of SL PRS resources.

[0191] In another optional embodiment, in the case where the frequency domain resources of the first PSCCH occupy the resources of Z interlaces, the mapping rule between the resources of the PSCCH and the resources of the Z interlaces is as follows (wherein, there are a total of M interlace resources, Z <M)。

[0192] Optionally, the frequency domain resource of the first PSCCH = floor (M / Z).

[0193] Optionally, the resource ID of the PSCCH is associated with the resources of the Z interlaces. Specifically, the mapping relationship between the resource ID of the PSCCH and the Z interlaces may include at least one of the following situations:

[0194] Case i. For example, PSCCH resource 0 is mapped to Z consecutive interlace resources, where mod(interlace resource ID / Z, candidate PSCCH resource) = PSCCH resource ID (e.g., M = 10, Z = 2; candidate PSCCH resource = 5, the PSCCH ID = 0, mapped to interlace resource IDs 0 and 1, and for another example, the PSCCH ID = 1, mapped to interlace resource IDs 2 and 3);

[0195] Case ii. For example, PSCCH resource 0 is mapped with Z interlace resources, where the adjacent interlace resources are separated by floor(M / Z) resources. Where mod(interlace resource ID, candidate PSCCH resource) = PSCCH resource ID is satisfied (e.g., M = 10, Z = 2; candidate PSCCH resource = 5, the PSCCH ID = 0 is mapped with interlace resource IDs 0 and 5, and for another example, the PSCCH ID = 1 is mapped with interlace resource IDs 1 and 6).

[0196] Figure 4a A method for transmitting a side link reference signal provided in an embodiment of the present application is as follows: Figure 4a As shown, the method includes:

[0197] S401: When the resources of the first PSCCH include the common PSCCH resources, preconfigure or predefine the frequency domain position of the common PSCCH resources.

[0198] In one implementation, the frequency domain position of the common PSCCH resource includes at least one of the following:

[0199] one or more interleaving resources;

[0200] Consecutive PRBs on one or more subchannels.

[0201] In one implementation, the common PSCCH resource includes at least one of the following:

[0202] A subchannel at a highest position of the second target frequency range;

[0203] the lowest subchannel of the second target frequency range;

[0204] a designated subchannel of the second target frequency range;

[0205] a subchannel at a highest position of each resource block set in the second target frequency range;

[0206] The lowest subchannel of each resource block set in the second target frequency range;

[0207] a designated subchannel of each resource block set of the second target frequency range;

[0208] Multiple PRBs with predetermined frequency domain intervals on the second target frequency range, where if adjacent PRBs are in different RBsets, the guard band in the cell is not considered, and it can be understood that the public PSCCH resources are calculated without considering the PRBs of the guard band. For example, 20M (RB set 1) + 2M (guard band) + 20M (RB set 2); the candidate position that can be used for the public PSCCH resource is the above-mentioned 20M + 20M position, ignoring the 2M of the guard band; multiple PRBs with predetermined frequency domain intervals on each resource block set in the second target frequency range.

[0209] It can be understood that if the common PSCCH resource is one of the following, the common PSCCH resource is sent based on continuous RBs:

[0210] A subchannel at a highest position of the second target frequency range;

[0211] the lowest subchannel of the second target frequency range;

[0212] a designated subchannel of the second target frequency range;

[0213] a subchannel at a highest position of each resource block set in the second target frequency range;

[0214] The lowest subchannel of each resource block set in the second target frequency range;

[0215] a designated subchannel of each resource block set of the second target frequency range;

[0216] It can be understood that if the common PSCCH resource is one of the following, the common PSCCH resource is sent on the interleaved resource:

[0217] A plurality of PRBs of a predetermined frequency domain interval on each resource block set of the second target frequency range;

[0218] A plurality of PRBs at a predetermined frequency domain interval in the second target frequency range;

[0219] The frequency domain interval here can be understood as the frequency domain interval of adjacent resources on an interleaved resource. Among them, the first target frequency domain range is one or N1 resource block sets in the first dedicated resource pool, and the second frequency range is N resource sets. In a given time domain or frequency domain, a time slot belongs to only one resource pool, and different resource pools can be distinguished. In this way, there is a commonly understood resource pool size on a specific RB set, so that the highest and / or lowest frequency domain position of the resource pool can be understood.

[0220] In one implementation, the identification of the resources of the first PSCCH is determined based on the number of subchannels or the subchannel sequence of the first dedicated resource pool, and the first target frequency domain range is the range of the first dedicated resource pool, mapped relative to the first dedicated resource pool, or the first target frequency domain range is a subset of the first dedicated resource pool, but in order to ensure that the SL PRS does not conflict when the UE occupies the second target frequency range, the identification of the PSCCH is based on the full set mapping.

[0221] In one implementation, the resource identifier of the first PSCCH is determined based on the number of subchannels or the subchannel sequence of the resource set of the first PSCCH. The resource identifier of the PSCCH is for each RB set, and is {1-10} for RB set 0 and {1-10} for RB set 1.

[0222] In one implementation, the identification of the resources of the first PSCCH is determined based on the number of subchannels or subchannel sequence in the second target frequency range. It can also be understood that the identification of the resources of the first PSCCH is determined based on the number of subchannels or subchannel sequence in the resource pool, or the identification of the resources of the first PSCCH is determined based on the number of subchannels or subchannel sequence in the resource pool except the guard band.

[0223] In one implementation, the resource identifier of the first PSCCH is mapped one-to-one with the identifier of the first reference signal, wherein the identifier of the first reference signal is related to the RE OFFSET, the optional start symbol in the slot, and the frequency domain position of the first reference signal.

[0224] In one implementation, the identifier of the first reference signal is mapped one-to-one to a first result, wherein the first result is the sum of the resource identifier of the first PSCCH and a first product, and the first product is the product of the identifier of the resource set of the first PSCCH and the number of subchannels in the resource set of the first PSCCH.

[0225] In one implementation, the first PSCCH or the dedicated PSCCH includes reference signal indication information, where the reference signal indication information is used to indicate at least one of the following:

[0226] identification information of the current first reference signal;

[0227] Identification information of one or more reserved first reference signals.

[0228] At this time, the resource identifier of the first PSCCH and the identifier of the first reference signal cannot form a one-to-one mapping.

[0229] In one implementation, the common PSCCH resource includes information related to channel occupancy time (COT), and the information related to the COT includes at least one of the following:

[0230] The remaining duration of the COT;

[0231] The channel access priority (CAPC) used;

[0232] The occupied resource identifier, such as a resource pool identifier, one or more resource collection identifiers;

[0233] Source address of shared COT channel resources;

[0234] Destination address identifier; it can be one or more destination address identifiers;

[0235] Other destination address identifiers;

[0236] Frequency domain information associated with COT, such as the first target frequency range, or the second target frequency range; for example, frequency domain information corresponding to RBset, such as N bits used to indicate the occupied RB set, such as 0 on the bit position indicates unavailable, and 1 on the bit position indicates double occupied. Where N is the number of RB sets included in the resource pool or the carrier, or the first target frequency domain range; or indicates whether the resources received by LBT are per RB, per resource pool, or per BWP.

[0237] First indication information, where the first indication information is used to indicate that the COT channel resources support location service sharing related resources; for example, a UE sending an SL PRS can share the COT, and a UE that has reserved the COT resources can continue to use the COT resources to send an SL PRS;

[0238] The second indication information is used to indicate a condition for sharing the COT. Optionally, the condition for sharing the COT is that the relevant information of the COT includes a destination address identifier, and optionally, a specified service, such as a positioning service. The terminal sending the first reference signal can share the COT. Optionally, the channel access priority used by the terminal sending the first reference signal shall not be greater than that indicated by the relevant information of the COT;

[0239] Indication information within the COT, used to indicate resources within the COT;

[0240] The out-of-COT indication information is used to indicate resources outside the COT.

[0241] In one implementation, the identification of the resources of the first PSCCH is determined based on the number of subchannels or the subchannel sequence of the first dedicated resource pool, and the first target frequency domain range is the range of the first dedicated resource pool, mapped relative to the first dedicated resource pool, or the first target frequency domain range is a subset of the first dedicated resource pool, but in order to ensure that the SL PRS does not conflict when the UE occupies the second target frequency range, the identification of the PSCCH is based on the full set mapping.

[0242] In one implementation, the resource identifier of the first PSCCH is determined based on the number of subchannels or the subchannel sequence of the resource set of the first PSCCH. The resource identifier of the PSCCH is for each RB set, and is {1-10} for RB set 0 and {1-10} for RB set 1.

[0243] In one implementation, if the frequency domain information associated with the COT includes multiple resource block sets, the information carried by the common PSCCH resource is repeatedly sent in each of the resource block sets.

[0244] S402: The first terminal sends a first reference signal in a first target frequency range of a first unlicensed resource and sends first control information in a second target frequency range.

[0245] This step can be done using Figure 2a The description of step S202 of the embodiment will not be repeated for the repeated parts.

[0246] Combination Figure 2d As shown, in addition to the first SCI 21 associated with the first SL PRS, a common SCI is sent to meet the OCB rule, wherein the common SCI is sent at the position of the last candidate PSCCH, or at the top of the frequency domain position.

[0247] In one implementation, Figure 4bAs shown, in addition to the first SCI31 associated with the first SL PRS, two common SCI32 are sent to meet the OCB rule. Among them, the common SCI is sent at the position of the last and first candidate PSCCH, or the top and bottom of the frequency domain position, so as to meet the OCB rule and use the occupied resources to transmit SCI, thereby improving resource utilization.

[0248] In one implementation, Figure 4c As shown, in addition to the first SCI31 associated with the first SL PRS, a common SCI32 is sent to meet the OCB rule. Figure 2i-2 As shown, a common resource 22 is sent in an RBSET. Among them, the common SCI 32 occupies the spaced PRBs in an interleaved manner, the interval between adjacent resources of the interleaved resources is Y PRBs, and the PRBs of the first SCI 31 are continuous PRBs except for the common SCI to meet the OCB rule. Optionally, in one embodiment, Y is related to the subcarrier spacing, or Y is preconfigured, or Y is determined based on the number M of candidate interleaved resources within the first target frequency range and the frequency domain resources occupied by the common PSCCH resources. Optionally, the common SCI is a predefined or preconfigured frequency domain position or content or size. Thus, the sending of the common PSCCH is combined with the interleaved sending to meet the OCB rule.

[0249] In one implementation, the frequency domain resources of the COT may be indicated by the resources of the first PSCCH or the common PSCCH resources.

[0250] In one implementation, the first PSCCH corresponds to a target object, and the target object includes: an interleaving position, a position of the first reference signal, or an identifier of the first reference signal.

[0251] In one implementation, the dedicated PSCCH corresponds to a target object, and the target object includes: an interleaving position, a position of the first reference signal, or an identifier of the first reference signal.

[0252] In one implementation, the identifier of the first PSCCH corresponds one-to-one with the identifier of the first reference signal.

[0253] Furthermore, in a case where the identifier of the first PSCCH corresponds one-to-one with the identifier of the first reference signal, the identifier of the first PSCCH is determined according to at least one of the following:

[0254] candidate resources of the first reference signal;

[0255] candidate resources of the first PSCCH;

[0256] combsize;

[0257] In one implementation, the identifier of the first PSCCH corresponds to the Z interleaved resources one by one, and Z is a positive integer greater than or equal to 1.

[0258] Furthermore, in a case where the identifier of the dedicated PSCCH corresponds one-to-one with the identifier of the first reference signal, the identifier of the dedicated PSCCH is determined according to at least one of the following:

[0259] candidate resources of the first reference signal;

[0260] candidate resources of the first PSCCH;

[0261] combsize;

[0262] In one implementation, the identifier of the first PSCCH corresponds to the Z interleaved resources one by one, and Z is a positive integer greater than or equal to 1.

[0263] In one implementation, when the identifier of the first PSCCH corresponds one-to-one to the Z interleaved resources, the number of candidate resources for the first PSCCH is determined according to the floor(M / Z) function, where M is the number of determined interleaved resources within the second frequency domain.

[0264] Optionally, the number of candidate resources for the first PSCCH = floor (M / Z).

[0265] Optionally, the number of candidate resources for the first PSCCH = floor(M / Z) + constant C.

[0266] In one implementation, in a one-to-many situation where the identifier of the first PSCCH and the Z interleaving resources are one-to-many, the PSCCH resources select corresponding interleaving resources in sequence or randomly.

[0267] In one implementation, in the case where the identifier of the dedicated PSCCH is one-to-many with the Z interleaving resources, the PSCCH resource selects the corresponding interleaving resource in sequence or randomly.

[0268] In one implementation, when there is a many-to-one relationship between the identifier of the first PSCCH and the Z interleaved resources, some of the PSCCH resources may not be transmitted in the current slot.

[0269] In one implementation, when there is a many-to-one relationship between the identifier of the dedicated PSCCH and the Z interleaved resources, some of the PSCCH resources may not be transmitted in the current slot.

[0270] In one implementation, when the identifier of the first PSCCH corresponds to the Z interlace resources one by one, the identifier of the first PSCCH is determined according to the identifier of the interlace resource, Z and the candidate PSCCH resource. For example, PSCCH resource 0 is mapped to Z consecutive interlace resources, where mod(interlace resource ID / Z, candidate PSCCH resource) = PSCCH resource ID, such as M = 10, Z = 2; candidate PSCCH resource = 5, PSCCH ID = 0, mapped to interlace resource ID 0, 1, and for another example, PSCCH ID = 1, mapped to interlace resource ID 2, 3.

[0271] Similarly, in the case where the identifier of the dedicated PSCCH corresponds one-to-one to the Z interleaved resources, the identifier of the dedicated PSCCH may also be determined based on the identifier of the interleaved resources, the Z and the candidate PSCCH resources.

[0272] In one implementation, if the common PSCCH resource and the dedicated PSCCH resource are included in a time slot, the common PSCCH resource and the dedicated PSCCH resource have different frequency domain locations.

[0273] The frequency domain resources of the common PSCCH include at least one of the following:

[0274] One or more specified subchannel or frequency domain locations in the resource pool

[0275] N3 specified subchannels or frequency domain positions in the N3 resource sets in the resource pool;

[0276] X2 interleaved resources in the resource pool;

[0277] X3 interleaved resources in the N3 resource sets in the resource pool;

[0278] In one implementation, if the frequency domain resources of the common PSCCH are one or more specified subchannels or frequency domain positions in the resource pool, it can be understood that, in one case, the terminal can only use the frequency domain resources of the common PSCCH as defined relative to the resource pool when the LBT resource is the resource set included in a resource pool.

[0279] In one implementation, if there are N3 designated subchannels or frequency domain positions in the N3 resource sets in the resource pool, it can be understood that if the resource pool includes N1 resource sets, the common PSCCH resources must be sent on the N1 resource sets to ensure that the receiving terminal can receive the common PSCCH. Or the terminal succeeds in LBT only in N3 resource sets, where N3<=N1, then the common PSCCH must be sent on the N3 resource sets where the LBT succeeds, and the positions for sending the common PSCCH on the N3 resource sets are (pre) designated or (pre) configured.

[0280] In one implementation, there are X2 interleaved resources in the resource pool, the common PSCCH is mapped to the interleaved resources, and the interleaved resources are configured based on the first dedicated resource pool.

[0281] In one implementation, the frequency domain position of the dedicated PSCCH resource is determined by the frequency domain position of the terminal excluding the frequency domain position occupied by the above-mentioned public PSCCH resource in the second target frequency range, or by the frequency domain position of the resource set excluding the frequency domain position occupied by the public PSCCH resource. In other words, the frequency domain position of the dedicated PSCCH resource is determined according to the first position or the second position. Among them, the first position is the frequency domain position occupied by the first terminal in the second target frequency range excluding the public PSCCH resource, and the second position is the frequency domain position occupied by the public PSCCH resource on the resource set included by the first PSCCH.

[0282] In one implementation, the identifier of the dedicated PSCCH resource satisfies at least one of the following:

[0283] is associated with a subchannel sequence at the first position;

[0284] is related to a subchannel sequence on the resource set excluding a frequency domain position occupied by the common PSCCH resource;

[0285] corresponding to the Z interleaved resources in the second target frequency range excluding the common PSCCH resources;

[0286] Corresponding to the identifiers of the Z interleaved resources excluding the frequency domain position occupied by the common PSCCH resource on the resource set.

[0287] In one implementation, the first PSCCH or the dedicated PSCCH carries resource reservation and indication information, wherein the resource reservation and indication information includes at least one of the following:

[0288] The third indication information is used to indicate that resources support sharing of positioning. For example, a UE that sends SLprs can share the COT, and a UE that has reserved the COT resource can continue to use the COT resource to send SL PRS.

[0289] Fourth indication information, where the fourth indication information is used to indicate a condition for sharing the COT;

[0290] Indicates the resource identifier;

[0291] Destination address identifier of shared COT resources;

[0292] The terminal identifier of the terminal associated with the resource reservation and indication information;

[0293] First resource indication information, where the resource indication information is used to indicate resources reserved for the first terminal;

[0294] Second resource indication information, where the second resource indication information is used to indicate repeated transmission on a resource;

[0295] The third resource indication information is used to indicate the continuous occupation of resources. For example, if each slot of the COT needs to be sent, no further indication is required, or 1 bit is used to indicate the need for continuous transmission. Optionally, all response resources except the indicated ones need to be sent, and no additional bit indication is required; for example, if the frequency domain resources are fixed, no additional indication is required, or the frequency domain resource information can be obtained based on the common resources, and no indication in the PSCCH is required.

[0296] second reference signal request indication information, where the second reference signal request indication information is used to request sending of the second reference signal, wherein the second reference signal is a signal received by the first terminal or a signal that the first terminal expects other terminals to send;

[0297] priority information of the first reference signal.

[0298] In one implementation, the first PSCCH carries channel sharing information, and the channel sharing information includes at least one of the following:

[0299] The remaining duration of the COT;

[0300] The CAPC used;

[0301] The resource identifier occupied;

[0302] The occupied destination address identifier;

[0303] Frequency domain information associated with COT; frequency domain information associated with COT, such as a first target frequency range, or a second target frequency range; for example, frequency domain information corresponding to an RB set, such as N bits used to indicate the occupied RB set; or indicating whether the resources received by LBT are per RB, per resource pool, or per BWP;

[0304] The fifth indication information is used to indicate that the COT channel resources support the sharing of resources related to the positioning service; for example, the UE sending the SL PRS can share the COT, and the UE that has reserved the COT resources can continue to use the COT resources to send the SL PRS;

[0305] The sixth indication information is used to indicate a condition for sharing the COT.

[0306] Optionally, the first PSCCH or the dedicated PSCCH carries resource reservation and indication information, wherein the resource reservation and indication information includes at least one of the following:

[0307] A first target terminal identifier associated with the first reference signal, such as a source identifier or a destination identifier;

[0308] a second target terminal identifier of a terminal associated with the reserved resources; the second target terminal identifier is different from the first target terminal identifier;

[0309] First resource indication information, where the resource indication information is used to indicate resources reserved for the first terminal; the first resource indication information includes at least one of frequency domain indication information, such as a frequency domain resource indication value (FRIV) or time domain indication information, such as a time domain resource indication value (TRIV);

[0310] Second resource indication information, where the second resource indication information is used to indicate repeated transmission on a resource;

[0311] third resource indication information, where the third resource indication information is used to indicate continuous occupation of resources;

[0312] The above-mentioned second resource indication information or third resource indication information may include time domain resource indication information, which is used to indicate that one or more time slots are reserved for the first terminal to send the first reference signal. Optionally, if each slot of the COT needs to be sent, no further indication is required, or 1 bit is used to indicate that continuous sending is required. Optionally, all response resources except the indicated ones need to be sent, and no additional bit indication is required; for example, if the frequency domain resources are fixed, no additional indication is required, or the frequency domain resource information can be obtained based on common resources, and no indication in the PSCCH is required; second reference signal request indication information, the second reference signal request indication information is used to request the sending of the second reference signal, wherein the second reference signal is a signal received by the first terminal or a signal that the first terminal expects other terminals to send;

[0313] priority information of the first reference signal.

[0314] Figure 5 is a schematic diagram of frequency domain resource indication, such as Figure 5 As shown, since a BWP can span multiple LBT subbands, the bandwidth of the LBT is not the frequency domain or LBT subband bandwidth of all subchannels. The SCI (PSCCH) or common PSCCH resources include resource pool indication information, which is used to indicate the frequency domain information of the SL PRS. For example, the resource pool indication information is N bits, corresponding to N resource pools. The SCI (PSCCH) or common PSCCH resources include M bits to indicate the LBT subband occupied by the SL PRS transmission resources. For example, there are M LBT subbands, and M is 5, then 00011 means that the resources for transmitting SL prs are the first two subbands.

[0315] Further, if the SCI can reserve multiple resources, the indicated resource has the same following information as the current resource:

[0316] 1. Resource pool indication information;

[0317] 2. Number of sub-bands;

[0318] 3. Bandwidth size;

[0319] 4. Starting frequency domain position;

[0320] 5. The reserved subband is the same as the current subband.

[0321] If the transmission resources used to send SL PRS occupy multiple LBT subbands, the PSCCH is interleaved on the multiple LBT subbands. In one embodiment, the PSCCH on different subbands is repeated PSCCH information. In another embodiment, the PSCCH considers the PRB on the LBT subband for M selection, that is, the interval of continuously interleaved PRBs. If the bandwidth of the resource pool is 40M=200PRB, and the SCI occupies 1 subchannel=10PRB, then M is 20.

[0322] Optionally, the SCI includes M bits for indicating the LBT subband occupied by the SL PRS transmission resources. If the bandwidths of the LBT subbands indicated by the multiple reservations are the same, but the subbands are different (similar to frequency hopping), then in case 1, the first reservation corresponds to subband 0, 1; the second reservation corresponds to subband 1, 2, and so on; in case 2, the first reservation corresponds to subband 0X; the second reservation corresponds to subband 1, x+1, and so on.

[0323] The transmission method of the sidelink reference signal provided in the embodiment of the present application can be performed by a transmission device of the sidelink reference signal. In the embodiment of the present application, the transmission method of the sidelink reference signal performed by the transmission device of the sidelink reference signal is taken as an example to illustrate the transmission device of the sidelink reference signal provided in the embodiment of the present application.

[0324] Figure 6 It is a structural diagram of a transmission device for a side link reference signal provided in an embodiment of the present application. As shown in the figure, the device 600 includes: a transmission module 610.

[0325] The transmission module 610 is configured to send a first reference signal in a first target frequency range of a first unlicensed resource and send first control information in a second target frequency range, wherein the first control information is transmitted on a resource of a first PSCCH, wherein the resource of the first PSCCH is at least one of the following:

[0326] Public PSCCH resources;

[0327] Dedicated PSCCH resources.

[0328] In one implementation, if the first PSCCH is a dedicated PSCCH resource, the frequency domain resources of the dedicated PSCCH are X interleaved resources; X is an integer greater than or equal to 1.

[0329] In one implementation, if the first PSCCH is a dedicated PSCCH resource, the time slot for transmitting the first PSCCH includes a common PSCCH resource, and the common PSCCH resource is used to indicate relevant information of the channel occupancy time COT to other terminals.

[0330] In one implementation, the first target frequency range belongs to a first bandwidth part BWP, wherein the first BWP is configured or preconfigured as: interleaved PSCCH-based; and / or interleaved PSSCH-based transmission.

[0331] In one implementation, the first BWP includes one or more first dedicated resource pools, where the first dedicated resource pools include one or N resource block sets, where a guard band is included between adjacent resource block sets, and N is an integer greater than 1.

[0332] In one implementation, the first target frequency range includes at least one of the following:

[0333] A frequency domain range included in the first dedicated resource pool;

[0334] One or N1 resource block sets in the first dedicated resource pool, where N1 is less than or equal to the N.

[0335] In one implementation, the resource block sets among the N resource block sets except the N1 resource block set are resource block sets where LBT fails.

[0336] In one implementation, the first terminal sending a first reference signal in a first target frequency range of a first unlicensed resource and sending first control information in a second target frequency range includes:

[0337] The first reference signal is continuously sent over the first target frequency range, wherein the first target frequency range also includes one or more resource block sets in the first dedicated resource pool and a guard band between the multiple resource block sets.

[0338] In one implementation, the first terminal sending a first reference signal in a first target frequency range of a first unlicensed resource and sending first control information in a second target frequency range includes:

[0339] The first reference signal is continuously sent over the first target frequency range, wherein the first target frequency range does not include a guard band between a plurality of resource block sets.

[0340] In one implementation, the first terminal sending a first reference signal in a first target frequency range of a first unlicensed resource and sending first control information in a second target frequency range includes:

[0341] The first reference signal is sent in an interleaved manner over the first target frequency range, wherein the first target frequency range subchannel satisfies at least one of the following:

[0342] One-to-one mapping with interleaved resources;

[0343] One-to-many mapping with interleaved resources.

[0344] In one implementation, the first target frequency range and the second target frequency range both belong to a first BWP, wherein the first BWP is configured or preconfigured as:

[0345] PSCCH based on continuous RB mapping; and / or

[0346] The first reference signal is transmitted based on continuous RB mapping.

[0347] In one implementation, the first terminal sending a first reference signal in a first target frequency range of a first unlicensed resource and sending first control information in a second target frequency range includes:

[0348] Transmitting the first PSCCH interleaved over a second target frequency range;

[0349] continuously sending the first PSCCH over a second target frequency range;

[0350] continuously transmitting a dedicated PSCCH over a second target frequency range;

[0351] The common PSCCH is continuously transmitted over the second target frequency range.

[0352] In one implementation, the frequency domain resources of the first PSCCH are mapped to at least one of the following frequency domain ranges:

[0353] a subchannel of a second target frequency range;

[0354] N1 subchannels on N1 resource block sets of a second target frequency range;

[0355] A plurality of PRBs at a predetermined frequency domain interval in a second target frequency range;

[0356] A plurality of PRBs with a predetermined frequency domain interval on each resource block set of the second target frequency range.

[0357] In one implementation, the second target frequency range includes at least one of the following:

[0358] A frequency domain range included in the first dedicated resource pool;

[0359] One or N2 resource block sets in a first dedicated resource pool, the first dedicated resource pool including one or N resource block sets; N is an integer greater than 1, and N2 is an integer greater than 1 and less than or equal to the integer;

[0360] The second target frequency range is smaller than or equal to the first target frequency range.

[0361] In one implementation, when the frequency domain resources of the first PSCCH are mapped to N1 subchannels on N1 resource block sets in the second target frequency range, at least one of the following is satisfied:

[0362] The information carried by the first PSCCH is repeatedly sent on the N1 resource block sets;

[0363] The N1 subchannels have the same resource block interval;

[0364] The N1 subchannels have the same subchannel index;

[0365] If the N1 subchannels have the same subchannel index, the subchannel index is indexed based on the resource block set to which it belongs.

[0366] In one implementation, if the first PSCCH is a dedicated PSCCH resource, the time slot for transmitting the first PSCCH includes a common PSCCH resource, and the common PSCCH resource is used to indicate relevant information of the channel occupancy time COT to other terminals.

[0367] In one implementation, the first PSCCH includes a common PSCCH resource and a dedicated PSCCH resource, and the first control information includes COT related information, and the COT related information includes at least one of the following:

[0368] The remaining duration of the COT;

[0369] The channel access priority CAPC used;

[0370] The resource identifier occupied;

[0371] Source address of shared COT channel resources;

[0372] Destination address identifier;

[0373] Frequency domain information associated with COT;

[0374] First indication information, where the first indication information is used to indicate that the COT channel resources support resources related to location service sharing;

[0375] second indication information, where the second indication information is used to indicate a condition for sharing the COT;

[0376] Indication information within the COT, used to indicate resources within the COT;

[0377] The COT out-of-COT indication information is used to indicate resources outside the COT. In one implementation, the identifier of the frequency domain resource of the first PSCCH satisfies at least one of the following:

[0378] Determined based on the number of subchannels or the subchannel sequence of the first dedicated resource pool;

[0379] Determined based on the number of subchannels or a subchannel sequence of a resource set included in the first PSCCH;

[0380] Determined based on the number of subchannels or the subchannel sequence in the second target frequency range;

[0381] One-to-one mapping with the identifier of the first reference signal;

[0382] One-to-one mapping with a first parameter, wherein the first parameter is determined according to the resource identifier of the first PSCCH, the identifier of the resource set included in the first PSCCH, and the number of subchannels in the resource set.

[0383] In one implementation, the first parameter is the sum of the resource identifier of the first PSCCH and a first product, where the first product is the product of the identifier of the resource set and the number of subchannels in the resource set. In one implementation, the first PSCCH or the dedicated PSCCH includes reference signal indication information, where the reference signal indication information is used to indicate at least one of the following:

[0384] identification information of the current first reference signal;

[0385] The identification information of one or more reserved first reference signals. In one implementation, the first PSCCH or dedicated PSCCH corresponds to a target object, and the target object includes: an interleaving position, a position of the first reference signal, or an identification of the first reference signal.

[0386] In one implementation, the first PSCCH or the dedicated PSCCH corresponds to a target object, including at least one of the following:

[0387] The identifier of the first PSCCH corresponds one-to-one with the identifier of the first reference signal;

[0388] The identifier of the dedicated PSCCH corresponds one-to-one with the identifier of the first reference signal;

[0389] The identifier of the first PSCCH corresponds one-to-one to the Z interleaved resources, where Z is a positive integer greater than or equal to 1, and the Z interleaved resources are at least a part of the X interleaved resources;

[0390] The identifier of the dedicated PSCCH corresponds one-to-one to the Z interleaved resources, where Z is a positive integer greater than or equal to 1;

[0391] The identifier of the first PSCCH corresponds one-to-many to the Z interleaved resources, where Z is a positive integer greater than or equal to 1, and the Z interleaved resources are at least a part of the X interleaved resources;

[0392] The identifier of the dedicated PSCCH corresponds one-to-many to Z of the interleaved resources, where Z is a positive integer greater than or equal to 1.

[0393] In one implementation, when the identifier of the first PSCCH or the identifier of the dedicated PSCCH corresponds one-to-one with the identifier of the first reference signal, the identifier of the first PSCCH or the identifier of the dedicated PSCCH is determined according to at least one of the following:

[0394] candidate resources of the first reference signal;

[0395] candidate resources of the first PSCCH;

[0396] combsize;

[0397] Candidate resources for time division multiplexing (TDM).

[0398] In one implementation, when the identifier of the first PSCCH or the identifier of the dedicated PSCCH corresponds one-to-one to the Z interleaved resources, the number of candidate resources of the first PSCCH is determined according to a floor(M / Z) function, where M is the number of determined interleaved resources within the second frequency domain;

[0399] The first frequency domain range includes at least one of the following:

[0400] A frequency domain range included in the first dedicated resource pool;

[0401] One or a set of N3 resource blocks in the first dedicated resource pool, where N1 is less than or equal to the N.

[0402] In one implementation, when there is a one-to-many correspondence between the identifier of the first PSCCH or the identifier of the dedicated PSCCH and Z of the interleaved resources, the identifier of the first PSCCH or the identifier of the dedicated PSCCH is determined based on the identifier of the interleaved resources, Z, at least two of the candidate PSCCH resources and the candidate first reference signal resources.

[0403] In one implementation, the first PSCCH or the dedicated PSCCH carries resource reservation and indication information, wherein the resource reservation and indication information includes at least one of the following:

[0404] third indication information, where the third indication information is used to indicate that the resource supports location sharing;

[0405] Fourth indication information, where the fourth indication information is used to indicate a condition for sharing the COT;

[0406] Indicates the resource identifier;

[0407] Destination address identifier of shared COT resources;

[0408] The terminal identifier of the terminal associated with the resource reservation and indication information;

[0409] First resource indication information, where the resource indication information is used to indicate resources reserved for the first terminal;

[0410] Second resource indication information, where the second resource indication information is used to indicate repeated transmission on a resource;

[0411] third resource indication information, where the third resource indication information is used to indicate continuous occupation of resources;

[0412] second reference signal request indication information, where the second reference signal request indication information is used to request sending of the second reference signal, wherein the second reference signal is a signal received by the first terminal or a signal that the first terminal expects other terminals to send;

[0413] priority information of the first reference signal.

[0414] In one implementation, when the frequency domain resources of the first PSCCH include: X interleaved resources, the method further includes:

[0415] The first PSCCH is mapped to the X interleaved resources, and adjacent resources of the interleaved resources are spaced apart by Y physical resource blocks (PRBs), where Y is an integer greater than 0.

[0416] In one implementation, Y satisfies at least one of the following:

[0417] It is pre-configured;

[0418] It is determined according to the number M of candidate interleaving resources within the first target frequency range and the frequency domain resources occupied by the common PSCCH resources.

[0419] In one implementation, the frequency domain position of the common PSCCH resource is preconfigured or predefined:

[0420] one or more interleaving resources;

[0421] Consecutive PRBs on one or more subchannels.

[0422] In one implementation, the common PSCCH resource includes at least one of the following:

[0423] A subchannel at a highest position of the second target frequency range;

[0424] the lowest subchannel of the second target frequency range;

[0425] a designated subchannel of the second target frequency range;

[0426] a subchannel at a highest position of each resource block set in the second target frequency range;

[0427] The lowest subchannel of each resource block set in the second target frequency range;

[0428] a designated subchannel of each resource block set of the second target frequency range;

[0429] A plurality of PRBs at a predetermined frequency domain interval in the second target frequency range;

[0430] A plurality of PRBs with a predetermined frequency domain interval on each resource block set in the second target frequency range.

[0431] In one implementation, the identifier of the common PSCCH resource satisfies at least one of the following:

[0432] Determined based on the number of subchannels or the subchannel sequence of the first dedicated resource pool;

[0433] Determined based on the number of subchannels or a subchannel sequence of a resource set included in the first PSCCH;

[0434] The method is determined based on the number of subchannels or the sequence of subchannels in the first target frequency range.

[0435] In one implementation, when the COT-associated frequency domain information carried by the common PSCCH resource includes multiple resource block sets, the information carried by the common PSCCH resource is repeatedly sent in each of the resource block sets.

[0436] In one implementation, if the common PSCCH resource and the dedicated PSCCH resource are included in a time slot, the common PSCCH resource and the dedicated PSCCH resource have different frequency domain locations.

[0437] In one implementation, the frequency domain position of the dedicated PSCCH resource is determined according to the first position or the second position:

[0438] The first position is the frequency domain position of the first terminal excluding the public PSCCH resources in the second target frequency range, and the second position is the frequency domain position excluding the public PSCCH resources on the resource set included in the first PSCCH.

[0439] In one implementation, the identifier of the dedicated PSCCH resource satisfies at least one of the following:

[0440] is associated with a subchannel sequence at the first position;

[0441] is related to a subchannel sequence on the resource set excluding a frequency domain position occupied by the common PSCCH resource;

[0442] corresponding to the Z interleaved resources in the second target frequency range excluding the common PSCCH resources;

[0443] Corresponding to the identifiers of the Z interleaved resources excluding the frequency domain position occupied by the common PSCCH resource on the resource set.

[0444] In one implementation, the first unlicensed resource is before or after a target resource, and the target resource is a resource used by other terminals except the first terminal to transmit a sidelink reference signal.

[0445] In one implementation, the bandwidth of the first reference signal is a first target frequency domain resource perceived by LBT or a frequency domain resource indicated by a first dedicated resource pool, and the first dedicated resource pool includes one or N resource block sets.

[0446] In an implementation manner, when the bandwidth of the first reference signal is a frequency domain resource indicated by the first dedicated resource pool, the method includes:

[0447] In the case that the first dedicated resource pool includes one or more resource block sets and there is a resource block set LBT failure, it is determined that the first dedicated resource pool LBT fails.

[0448] In one implementation, when the bandwidth of the first reference signal is a first target frequency domain resource perceived by the LBT, and the first target frequency domain resource belongs to the frequency domain resource indicated by the first dedicated resource pool, the method includes:

[0449] In the case that the first dedicated resource pool includes multiple resource block sets and LBT of at least one resource block set is successful, the resource block set for which LBT of the first dedicated resource pool is successful is determined as the first target frequency domain resource.

[0450] In one implementation, the apparatus 600 further includes a determination module, configured to determine a type of listen-before-talk LBT when a duration of sending the first reference signal or the first PSCCH sending the SCI is less than a first time threshold.

[0451] In one implementation, the determination module determines whether the perceived resources are in an idle state through the LBT before the first terminal sends a first reference signal related to a target frequency range beam on a first unauthorized resource and sends first control information on a second target frequency range.

[0452] In one implementation, the transmission module 610 shares the COT resource of the first terminal with the second terminal, and sends second control information to the second terminal, where the second control information includes relevant information of the COT;

[0453] In an implementation manner, the second control information further includes association information of the first reference signal, and the association information of the first reference signal includes at least one of the following:

[0454] Resource identification;

[0455] Destination address identifier;

[0456] a request message for the first reference signal;

[0457] Advertisement type;

[0458] Priority information;

[0459] Bandwidth information;

[0460] Resource pool information;

[0461] Time-frequency resource indication information.

[0462] In an implementation manner, the second control information further includes association information of a second reference signal sent by the second terminal, and the association information of the second reference signal includes at least one of the following:

[0463] The second terminal sends frequency domain resource indication information of a second reference signal;

[0464] a resource identifier of the second terminal;

[0465] The destination identifier of the second terminal.

[0466] The transmission device of the side link reference signal 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 a device other than a terminal. Exemplarily, the terminal may include but is not limited to the types of terminal 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.

[0467] The transmission device of the side link reference signal provided in the embodiment of the present application can realize Figure 1 a to Figure 4a The various processes implemented by the method embodiment and achieving the same technical effect are not described here to avoid repetition.

[0468] 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 1 a to Figure 4a The 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, Figure 7 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0469] The terminal 700 includes but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709 and at least some of the components of a processor 710.

[0470] Those skilled in the art will appreciate that the terminal 700 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 710 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Figure 7 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.

[0471] It should be understood that in the embodiment of the present application, the input unit 704 may include a graphics processing unit (GPU) 7041 and a microphone 7042, and the graphics processor 7041 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 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 707 includes a touch panel 7071 and at least one of other input devices 7072. The touch panel 7071 is also called a touch screen. The touch panel 7071 may include two parts: a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (such as a volume control button, a switch button, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0472] In the embodiment of the present application, after receiving downlink data from the network side device, the RF unit 701 can transmit the data to the processor 710 for processing; in addition, the RF unit 701 can send uplink data to the network side device. Generally, the RF unit 701 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0473] The memory 709 can be used to store software programs or instructions and various data. The memory 709 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 709 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 709 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0474] The processor 710 may include one or more processing units; optionally, the processor 710 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 710.

[0475] The processor 710 is configured to send a first reference signal in a first target frequency range of a first unlicensed resource and send first control information in a second target frequency range, wherein the frequency domain resources of the first PSCCH include at least one of the following:

[0476] X interleaving resources; X is an integer greater than or equal to 1;

[0477] Public PSCCH resources;

[0478] Dedicated PSCCH resources.

[0479] In one implementation, the first target frequency range belongs to a first bandwidth part BWP, wherein the first BWP is configured or preconfigured as:

[0480] Interleaved PSCCH based; and / or

[0481] Interleaved based PSSCH transmission.

[0482] In one implementation, the first BWP includes one or more first dedicated resource pools, where the first dedicated resource pools include one or N resource block sets, where a guard band is included between adjacent resource block sets, and N is an integer greater than 1.

[0483] In one implementation, the first target frequency range includes at least one of the following:

[0484] A frequency domain range included in the first dedicated resource pool;

[0485] One or N1 resource block sets in the first dedicated resource pool, where N1 is less than or equal to the N.

[0486] In one implementation, the resource block sets among the N resource block sets except the N1 resource block set are resource block sets where LBT fails.

[0487] In one implementation, the first terminal sending a first reference signal in a first target frequency range of a first unlicensed resource and sending first control information in a second target frequency range includes:

[0488] The first reference signal is continuously sent over the first target frequency range, wherein the first target frequency range also includes one or more resource block sets in the first dedicated resource pool and a guard band between the multiple resource block sets.

[0489] In one implementation, the first terminal sending a first reference signal in a first target frequency range of a first unlicensed resource and sending first control information in a second target frequency range includes:

[0490] The first reference signal is continuously sent over the first target frequency range, wherein the first target frequency range does not include a guard band between a plurality of resource block sets.

[0491] In one implementation, the first terminal sending a first reference signal in a first target frequency range of a first unlicensed resource and sending first control information in a second target frequency range includes:

[0492] The first reference signal is sent in an interleaved manner over the first target frequency range, wherein the first target frequency range subchannel satisfies at least one of the following:

[0493] One-to-one mapping with interleaved resources;

[0494] One-to-many mapping with interleaved resources.

[0495] In one implementation, the first target frequency range and the second target frequency range both belong to a first BWP, wherein the first BWP is configured or preconfigured as:

[0496] PSCCH based on continuous RB mapping; and / or

[0497] The first reference signal is transmitted based on continuous RB mapping.

[0498] In one implementation, the first terminal sending a first reference signal in a first target frequency range of a first unlicensed resource and sending first control information in a second target frequency range includes:

[0499] Transmitting the first PSCCH interleaved over a second target frequency range;

[0500] continuously sending the first PSCCH over a second target frequency range;

[0501] continuously transmitting a dedicated PSCCH over a second target frequency range;

[0502] The common PSCCH is continuously transmitted over the second target frequency range.

[0503] In one implementation, the frequency domain resources of the first PSCCH are mapped to at least one of the following frequency domain ranges:

[0504] a subchannel of a second target frequency range;

[0505] N1 subchannels on N1 resource block sets of a second target frequency range;

[0506] A plurality of PRBs at a predetermined frequency domain interval in a second target frequency range;

[0507] A plurality of PRBs with a predetermined frequency domain interval on each resource block set of the second target frequency range.

[0508] In one implementation, the second target frequency range includes at least one of the following:

[0509] A frequency domain range included in the first dedicated resource pool;

[0510] One or N2 resource block sets in a first dedicated resource pool, the first dedicated resource pool including one or N resource block sets; N is an integer greater than 1, and N2 is an integer greater than 1 and less than or equal to the integer;

[0511] The second target frequency range is smaller than or equal to the first target frequency range.

[0512] In one implementation, when the frequency domain resources of the first PSCCH are mapped to N1 subchannels on N1 resource block sets in the second target frequency range, at least one of the following is satisfied:

[0513] The information carried by the first PSCCH is repeatedly sent on the N1 resource block sets;

[0514] The N1 subchannels have the same resource block interval;

[0515] The N1 subchannels have the same subchannel index;

[0516] If the N1 subchannels have the same subchannel index, the subchannel index is indexed based on the resource block set to which it belongs.

[0517] In one implementation, if the first PSCCH is a dedicated PSCCH resource, the time slot for transmitting the first PSCCH includes a common PSCCH resource, and the common PSCCH resource is used to indicate relevant information of the channel occupancy time COT to other terminals.

[0518] In one implementation, the first PSCCH includes a common PSCCH resource and a dedicated PSCCH resource, and the first control information includes COT related information, and the COT related information includes at least one of the following:

[0519] The remaining duration of the COT;

[0520] The channel access priority CAPC used;

[0521] The resource identifier occupied;

[0522] Source address of shared COT channel resources;

[0523] Destination address identifier;

[0524] Frequency domain information associated with COT;

[0525] First indication information, where the first indication information is used to indicate that the COT channel resources support resources related to location service sharing;

[0526] second indication information, where the second indication information is used to indicate a condition for sharing the COT;

[0527] Indicative information within COT;

[0528] COT external indication information.

[0529] In one implementation, the identifier of the frequency domain resource of the first PSCCH satisfies at least one of the following:

[0530] Determined based on the number of subchannels or the subchannel sequence of the first dedicated resource pool;

[0531] Determined based on the number of subchannels or a subchannel sequence of a resource set included in the first PSCCH;

[0532] Determined based on the number of subchannels or the subchannel sequence in the second target frequency range;

[0533] One-to-one mapping with the identifier of the first reference signal;

[0534] One-to-one mapping with a first parameter, wherein the first parameter is determined according to the resource identifier of the first PSCCH, the identifier of the resource set included in the first PSCCH, and the number of subchannels in the resource set.

[0535] In one implementation, the first parameter is the sum of the resource identifier of the first PSCCH and a first product, where the first product is the product of the identifier of the resource set and the number of subchannels in the resource set. In one implementation, the first PSCCH or the dedicated PSCCH includes reference signal indication information, where the reference signal indication information is used to indicate at least one of the following:

[0536] identification information of the current first reference signal;

[0537] The identification information of one or more reserved first reference signals. In one implementation, the first PSCCH or dedicated PSCCH corresponds to a target object, and the target object includes: an interleaving position, a position of the first reference signal, or an identification of the first reference signal.

[0538] In one implementation, the first PSCCH or the dedicated PSCCH corresponds to a target object, including at least one of the following:

[0539] The identifier of the first PSCCH corresponds one-to-one with the identifier of the first reference signal;

[0540] The identifier of the dedicated PSCCH corresponds one-to-one with the identifier of the first reference signal;

[0541] The identifier of the first PSCCH corresponds one-to-one to the Z interleaved resources, where Z is a positive integer greater than or equal to 1, and the Z interleaved resources are at least a part of the X interleaved resources;

[0542] The identifier of the dedicated PSCCH corresponds one-to-one to the Z interleaved resources, where Z is a positive integer greater than or equal to 1;

[0543] The identifier of the first PSCCH corresponds one-to-many to the Z interleaved resources, where Z is a positive integer greater than or equal to 1, and the Z interleaved resources are at least a part of the X interleaved resources;

[0544] The identifier of the dedicated PSCCH corresponds one-to-many to Z of the interleaved resources, where Z is a positive integer greater than or equal to 1.

[0545] In one implementation, when the identifier of the first PSCCH or the identifier of the dedicated PSCCH corresponds one-to-one with the identifier of the first reference signal, the identifier of the first PSCCH or the identifier of the dedicated PSCCH is determined according to at least one of the following:

[0546] candidate resources of the first reference signal;

[0547] candidate resources of the first PSCCH;

[0548] combsize;

[0549] Candidate resources for time division multiplexing (TDM).

[0550] In one implementation, when the identifier of the first PSCCH or the identifier of the dedicated PSCCH corresponds one-to-one to the Z interleaved resources, the number of candidate resources of the first PSCCH is determined according to a floor(M / Z) function, where M is the number of determined interleaved resources within the second frequency domain;

[0551] The first frequency domain range includes at least one of the following:

[0552] A frequency domain range included in the first dedicated resource pool;

[0553] One or a set of N3 resource blocks in the first dedicated resource pool, where N1 is less than or equal to the N.

[0554] In one implementation, when there is a one-to-many correspondence between the identifier of the first PSCCH or the identifier of the dedicated PSCCH and Z of the interleaved resources, the identifier of the first PSCCH or the identifier of the dedicated PSCCH is determined based on the identifier of the interleaved resources, Z, at least two of the candidate PSCCH resources and the candidate first reference signal resources.

[0555] In one implementation, the first PSCCH or the dedicated PSCCH carries resource reservation and indication information, wherein the resource reservation and indication information includes at least one of the following:

[0556] third indication information, where the third indication information is used to indicate that the resource supports location sharing;

[0557] Fourth indication information, where the fourth indication information is used to indicate a condition for sharing the COT;

[0558] Indicates the resource identifier;

[0559] Destination address identifier of shared COT resources;

[0560] The terminal identifier of the terminal associated with the resource reservation and indication information;

[0561] First resource indication information, where the resource indication information is used to indicate resources reserved for the first terminal;

[0562] Second resource indication information, where the second resource indication information is used to indicate repeated transmission on a resource;

[0563] third resource indication information, where the third resource indication information is used to indicate continuous occupation of resources;

[0564] second reference signal request indication information, where the second reference signal request indication information is used to request sending of the second reference signal, wherein the second reference signal is a signal received by the first terminal or a signal that the first terminal expects other terminals to send;

[0565] priority information of the first reference signal.

[0566] In one implementation, when the frequency domain resources of the first PSCCH include: X interleaved resources, the first PSCCH is mapped to the X interleaved resources, and adjacent resources of the interleaved resources are spaced by Y physical resource blocks (PRBs), where Y is an integer greater than 0.

[0567] In one implementation, Y satisfies at least one of the following:

[0568] It is pre-configured;

[0569] It is determined according to the number M of candidate interleaving resources within the first target frequency range and the frequency domain resources occupied by the common PSCCH resources.

[0570] In one implementation, the frequency domain position of the common PSCCH resource is preconfigured or predefined:

[0571] one or more interleaving resources;

[0572] Consecutive PRBs on one or more subchannels.

[0573] It can be understood that the public PSCCH resource carries the first information, so that other terminals can first determine whether the resource belongs to the COT or outside the COT on the determined public PSCCH resource, thereby determining the processing method of the UE, that is, it can be understood that the processing methods inside and outside the COT are different. If the other terminal determines that the public PSCCH resource carries the first information, but the resources in the COT cannot be used by the terminal, the terminal skips the transmission of the COT. If the other terminal determines that the public PSCCH resource carries the first information and the resources in the COT can be used by the terminal, the terminal determines whether the first reference signal can be transmitted on the resources reserved by the terminal. If not, resource reselection is performed. If the other terminal determines that the public PSCCH resource does not carry the first information and is not occupied by other terminals, the terminal sends the public PSCCH resource in the subsequent time slot.

[0574] In one implementation, the common PSCCH resource includes at least one of the following:

[0575] A subchannel at a highest position of the second target frequency range;

[0576] the lowest subchannel of the second target frequency range;

[0577] a designated subchannel of the second target frequency range;

[0578] a subchannel at a highest position of each resource block set in the second target frequency range;

[0579] The lowest subchannel of each resource block set in the second target frequency range;

[0580] a designated subchannel of each resource block set of the second target frequency range;

[0581] A plurality of PRBs at a predetermined frequency domain interval in the second target frequency range;

[0582] A plurality of PRBs with a predetermined frequency domain interval on each resource block set in the second target frequency range.

[0583] In one implementation, the identifier of the common PSCCH resource satisfies at least one of the following:

[0584] Determined based on the number of subchannels or the subchannel sequence of the first dedicated resource pool;

[0585] Determined based on the number of subchannels or a subchannel sequence of a resource set included in the first PSCCH;

[0586] The method is determined based on the number of subchannels or the sequence of subchannels in the first target frequency range.

[0587] In one implementation, when the COT-associated frequency domain information carried by the common PSCCH resource includes multiple resource block sets, the information carried by the common PSCCH resource is repeatedly sent in each of the resource block sets.

[0588] In one implementation, if the common PSCCH resource and the dedicated PSCCH resource are included in a time slot, the common PSCCH resource and the dedicated PSCCH resource have different frequency domain locations.

[0589] In one implementation, the frequency domain position of the dedicated PSCCH resource is determined according to the first position or the second position:

[0590] The first position is the frequency domain position of the first terminal excluding the public PSCCH resources in the second target frequency range, and the second position is the frequency domain position excluding the public PSCCH resources on the resource set included in the first PSCCH.

[0591] In one implementation, the identifier of the dedicated PSCCH resource satisfies at least one of the following:

[0592] is associated with a subchannel sequence at the first position;

[0593] is related to a subchannel sequence on the resource set excluding a frequency domain position occupied by the common PSCCH resource;

[0594] corresponding to the Z interleaved resources in the second target frequency range excluding the common PSCCH resources;

[0595] Corresponding to the identifiers of the Z interleaved resources excluding the frequency domain position occupied by the common PSCCH resource on the resource set.

[0596] In one implementation, the first unlicensed resource is before or after a target resource, and the target resource is a resource used by other terminals except the first terminal to transmit a sidelink reference signal.

[0597] In one implementation, the bandwidth of the first reference signal is a first target frequency domain resource perceived by LBT or a frequency domain resource indicated by a first dedicated resource pool, and the first dedicated resource pool includes one or N resource block sets.

[0598] In an implementation manner, when the bandwidth of the first reference signal is a frequency domain resource indicated by the first dedicated resource pool, the method includes:

[0599] In the case that the first dedicated resource pool includes one or more resource block sets and there is a resource block set LBT failure, it is determined that the first dedicated resource pool LBT fails.

[0600] In one implementation, when the bandwidth of the first reference signal is a first target frequency domain resource perceived by the LBT, and the first target frequency domain resource belongs to the frequency domain resource indicated by the first dedicated resource pool, the method includes:

[0601] In the case that the first dedicated resource pool includes multiple resource block sets and LBT of at least one resource block set is successful, the resource block set for which LBT of the first dedicated resource pool is successful is determined as the first target frequency domain resource.

[0602] In one implementation, when a sending duration of sending the first reference signal or the first PSCCH sending the SCI is less than a first time threshold, a listen-before-talk LBT type is determined.

[0603] In one implementation, before the first terminal sends a first reference signal related to a beam in a target frequency range on a first unlicensed resource and sends first control information in a second target frequency range, the method further includes:

[0604] Through the LBT, it is determined whether the perceived resource is in an idle state.

[0605] In one implementation, the COT resource of the first terminal is shared with the second terminal, and second control information is sent to the second terminal, where the second control information includes relevant information of the COT.

[0606] In an implementation manner, the second control information further includes association information of the first reference signal, and the association information of the first reference signal includes at least one of the following:

[0607] Resource identification;

[0608] Destination address identifier;

[0609] a request message for the first reference signal;

[0610] Advertisement type;

[0611] Priority information;

[0612] Bandwidth information;

[0613] Resource pool information;

[0614] Time-frequency resource indication information.

[0615] In an implementation manner, the second control information further includes association information of a second reference signal sent by the second terminal, and the association information of the second reference signal includes at least one of the following:

[0616] The second terminal sends frequency domain resource indication information of a second reference signal;

[0617] a resource identifier of the second terminal;

[0618] The destination identifier of the second terminal.

[0619] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to Figure 2a-Figure 4a The relevant descriptions of the method embodiments have achieved the same or corresponding technical effects and will not be repeated here to avoid repetition.

[0620] The 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 above Figure 2a-Figure 4a The relevant descriptions of the method embodiments have achieved the same or corresponding technical effects and will not be repeated here to avoid repetition.

[0621] 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.

[0622] The present application also 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 a program or instruction to implement the above Figure 2a-Figure 4a The relevant description of the method embodiment and the same or corresponding technical effect are achieved, and are not repeated here to avoid repetition. It should be understood that the chip mentioned in the embodiment 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.

[0623] The present application embodiment further provides a computer program / program product, wherein the computer program / program product is stored in a storage medium, and the computer program / program product is executed by at least one processor to implement the above Figure 2a-Figure 4a The relevant descriptions of the method embodiments have achieved the same or corresponding technical effects and will not be repeated here to avoid repetition.

[0624] 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.

[0625] 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.

[0626] 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 method for transmitting a side link reference signal, characterized in that: include: The first terminal sends a first reference signal in a first target frequency range of a first unlicensed resource and sends first control information in a second target frequency range, wherein the first control information is transmitted on a resource of a first PSCCH, wherein the resource of the first PSCCH is at least one of the following: Public PSCCH resources; Dedicated PSCCH resources.

2. The transmission method according to claim 1, characterized in that: If the first PSCCH is a dedicated PSCCH resource, the frequency domain resources of the dedicated PSCCH are X interleaved resources; X is an integer greater than or equal to 1.

3. The transmission method according to claim 2, characterized in that: The method further comprises: The first PSCCH is mapped to the X interleaved resources, and adjacent resources of the interleaved resources are spaced apart by Y physical resource blocks (PRBs), where Y is an integer greater than 0.

4. The transmission method according to claim 3, characterized in that: The Y satisfies at least one of the following: It is pre-configured; It is determined according to the number M of candidate interleaving resources and / or the frequency domain resources occupied by common PSCCH resources within the second target frequency range.

5. The transmission method according to claim 1, characterized in that: If the first PSCCH is a dedicated PSCCH resource, the time slot for transmitting the first PSCCH includes a common PSCCH resource, and the common PSCCH resource is used for other terminals to indicate relevant information of the channel occupancy time COT.

6. The transmission method according to claim 1, characterized in that: The first PSCCH includes a common PSCCH resource and a dedicated PSCCH resource, the first control information includes COT related information, and the COT related information includes at least one of the following: 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.

7. The transmission method according to claim 1, 5 or 6, characterized in that: The first PSCCH or the dedicated PSCCH includes reference signal indication information, where the reference signal indication information is used to indicate at least one of the following: identification information of the current first reference signal; Identification information of one or more reserved first reference signals.

8. The transmission method according to any one of claims 1, 6 and 7, characterized in that: The first PSCCH or the dedicated PSCCH carries resource reservation and indication information, wherein the resource reservation and indication information includes at least one of the following: third indication information, where the third indication information is used to indicate that the resource supports location sharing; Fourth indication information, where the fourth indication information is used to indicate a condition for sharing the COT; a resource identifier of the first reference signal; Destination address identifiers of other terminals that share COT resources; The terminal identifier of the terminal associated with the resource reservation and indication information; First resource indication information, where the resource indication information is used to indicate resources reserved for the first terminal; Second resource indication information, where the second resource indication information is used to indicate repeated transmission on a resource; third resource indication information, where the third resource indication information is used to indicate continuous occupation of resources; second reference signal request indication information, where the second reference signal request indication information is used to request sending of the second reference signal, wherein the second reference signal is a signal received by the first terminal or a signal that the first terminal expects other terminals to send; Resource pool information; Cast type; priority information of the first reference signal.

9. The transmission method according to claim 1, characterized in that: The first target frequency range and the second target frequency range both belong to a first bandwidth part BWP, wherein the first BWP is configured or preconfigured as: Interleaved PSCCH based; and / or Interleaved based PSSCH transmission.

10. The transmission method according to claim 9, characterized in that: The first BWP includes one or more first dedicated resource pools, wherein the first dedicated resource pool includes one or N resource block sets, wherein a guard band is included between adjacent resource block sets, and N is an integer greater than 1.

11. The transmission method according to claim 10, characterized in that: The first target frequency range includes at least one of the following: A frequency domain range included in the first dedicated resource pool; One or N1 resource block sets in the first dedicated resource pool, where N1 is less than or equal to the N.

12. The transmission method according to claim 11, characterized in that: The resource block sets among the N resource block sets except the N1 resource block set are resource block sets where LBT fails.

13. The transmission method according to claim 10, characterized in that: The first terminal sending a first reference signal in a first target frequency range of a first unlicensed resource and sending first control information in a second target frequency range includes: The first reference signal is continuously sent over the first target frequency range, wherein the first target frequency range also includes one or more resource block sets in the first dedicated resource pool and a guard band between the multiple resource block sets.

14. The transmission method according to claim 3, characterized in that: The first terminal sending a first reference signal in a first target frequency range of a first unlicensed resource and sending first control information in a second target frequency range includes: The first reference signal is continuously sent over the first target frequency range, wherein the first target frequency range does not include a guard band between a plurality of resource block sets.

15. The transmission method according to claim 10, characterized in that: The first terminal sending a first reference signal in a first target frequency range of a first unlicensed resource and sending first control information in a second target frequency range includes: The first reference signal is sent in an interleaved manner over the first target frequency range, wherein the first target frequency range subchannel satisfies at least one of the following: One-to-one mapping with interleaved resources; One-to-many mapping with interleaved resources.

16. The transmission method according to claim 1, characterized in that: The first target frequency range and the second target frequency range both belong to a first BWP, wherein the first BWP is configured or preconfigured as: PSCCH based on continuous RB mapping; and / or The first reference signal is transmitted based on continuous RB mapping.

17. The transmission method according to claim 16, characterized in that: The first terminal sending a first reference signal in a first target frequency range of a first unlicensed resource and sending first control information in a second target frequency range includes at least one of the following: Transmitting the first PSCCH interleaved over a second target frequency range; continuously sending the first PSCCH over a second target frequency range; continuously transmitting a dedicated PSCCH over a second target frequency range; The common PSCCH is continuously transmitted over the second target frequency range.

18. The transmission method according to claim 1 or 17, characterized in that: The frequency domain resources of the first PSCCH are mapped to at least one of the following frequency domain ranges: a subchannel of a second target frequency range; N1 subchannels on N1 resource block sets of a second target frequency range; A plurality of PRBs at a predetermined frequency domain interval in a second target frequency range; A plurality of PRBs with a predetermined frequency domain interval on each resource block set of the second target frequency range.

19. The transmission method according to claim 1 or 18, characterized in that: The second target frequency range includes at least one of the following: A frequency domain range included in the first dedicated resource pool; One or N2 resource block sets in a first dedicated resource pool, the first dedicated resource pool including one or N resource block sets; N is an integer greater than 1, and N2 is an integer greater than 1 and less than or equal to the integer; The second target frequency range is smaller than or equal to the first target frequency range.

20. The transmission method according to claim 18, characterized in that: When the frequency domain resources of the first PSCCH are mapped to N1 subchannels on N1 resource block sets in the second target frequency range, at least one of the following is satisfied: The information carried by the first PSCCH is repeatedly sent on the N1 resource block sets; The N1 subchannels have the same resource block interval; The N1 subchannels have the same subchannel index; If the N1 subchannels have the same subchannel index, the subchannel index is indexed based on the resource block set to which it belongs.

21. The transmission method according to claim 19, characterized in that: The identifier of the resource of the first PSCCH satisfies at least one of the following: Determined based on the number of subchannels or the subchannel sequence of the first dedicated resource pool; Determined based on the number of subchannels or a subchannel sequence of a resource set included in the first PSCCH; Determined based on the number of subchannels or the subchannel sequence in the second target frequency range; One-to-one mapping with the identifier of the first reference signal; one-to-one mapping with a first parameter, wherein the first parameter is determined according to the resource identifier of the first PSCCH, the identifier of the resource set included in the first PSCCH and the number of subchannels in the resource set.

22. The transmission method according to claim 21, characterized in that: The first parameter is the sum of the resource identifier of the first PSCCH and a first product, and the first product is the product of the identifier of the resource set and the number of subchannels in the resource set.

23. The transmission method according to claim 1, characterized in that: The first PSCCH or the dedicated PSCCH corresponds to a target object, and the target object includes: an interleaving position, a position of the first reference signal, or an identifier of the first reference signal.

24. The transmission method according to claim 23, characterized in that: The first PSCCH or the dedicated PSCCH corresponds to a target object, including at least one of the following: The identifier of the first PSCCH corresponds one-to-one with the identifier of the first reference signal; The identifier of the dedicated PSCCH corresponds one-to-one with the identifier of the first reference signal; The identifier of the first PSCCH corresponds one-to-one to the Z interleaved resources, where Z is a positive integer greater than or equal to 1, and the Z interleaved resources are at least a part of the X interleaved resources; The identifier of the dedicated PSCCH corresponds one-to-one to the Z interleaved resources, where Z is a positive integer greater than or equal to 1; The identifier of the first PSCCH corresponds one-to-many to the Z interleaved resources, where Z is a positive integer greater than or equal to 1, and the Z interleaved resources are at least a part of the X interleaved resources; The identifier of the dedicated PSCCH corresponds one-to-many to Z of the interleaved resources, where Z is a positive integer greater than or equal to 1.

25. The transmission method according to claim 24, characterized in that: In a case where the identifier of the first PSCCH or the identifier of the dedicated PSCCH corresponds one-to-one with the identifier of the first reference signal, the identifier of the first PSCCH or the identifier of the dedicated PSCCH is determined according to at least one of the following: candidate resources of the first reference signal; candidate resources of the first PSCCH; combsize; Candidate resources for time division multiplexing (TDM).

26. The transmission method according to claim 24, characterized in that: In a case where the identifier of the first PSCCH or the identifier of the dedicated PSCCH corresponds one-to-one to the Z interleaved resources, the number of candidate resources for the first PSCCH is determined according to a floor(M / Z) function, where M is the number of interleaved resources determined within the second target frequency domain; The first frequency domain range includes at least one of the following: A frequency domain range included in the first dedicated resource pool; One or a set of N3 resource blocks in the first dedicated resource pool, where N1 is less than or equal to the N.

27. The transmission method according to claim 24, characterized in that: In the case where there is a one-to-many correspondence between the identifier of the first PSCCH or the identifier of the dedicated PSCCH and Z of the interleaved resources, the identifier of the first PSCCH or the identifier of the dedicated PSCCH is determined based on the identifier of the interleaved resources, Z, at least two of the candidate PSCCH resources and the candidate first reference signal resources.

28. The transmission method according to claim 1, 5 or 6, characterized in that: The frequency domain position of the common PSCCH resource is preconfigured or predefined one or more interleaved resources or consecutive PRBs on one or more subchannels.

29. The transmission method according to claim 28, characterized in that: The common PSCCH resource includes at least one of the following: A subchannel at a highest position of the second target frequency range; the lowest subchannel of the second target frequency range; a designated subchannel of the second target frequency range; a subchannel at a highest position of each resource block set in the second target frequency range; The lowest subchannel of each resource block set in the second target frequency range; a designated subchannel of each resource block set of the second target frequency range; A plurality of PRBs at a predetermined frequency domain interval in the second target frequency range; A plurality of PRBs with a predetermined frequency domain interval on each resource block set in the second target frequency range.

30. The transmission method according to claim 28, characterized in that: The identifier of the common PSCCH resource satisfies at least one of the following: Determined based on the number of subchannels or the subchannel sequence of the first dedicated resource pool; Determined based on the number of subchannels or a subchannel sequence of a resource set included in the first PSCCH; The method is determined based on the number of subchannels or the sequence of subchannels in the first target frequency range.

31. The transmission method according to claim 30, characterized in that: In the case where the COT-associated frequency domain information carried by the common PSCCH resource includes multiple resource block sets, the information carried by the common PSCCH resource is repeatedly sent in each of the resource block sets.

32. The transmission method according to any one of claims 1, 5 or 6, characterized in that: If a time slot includes the common PSCCH resource and the dedicated PSCCH resource, the frequency domain positions of the common PSCCH resource and the dedicated PSCCH resource are different.

33. The transmission method according to claim 32, wherein the frequency domain position of the dedicated PSCCH resource is determined according to the first position or the second position: in, The first position is the frequency domain position of the first terminal excluding the common PSCCH resources in the second target frequency range, and the second position is the frequency domain position excluding the common PSCCH resources on the resource set included in the first PSCCH.

34. The transmission method according to claim 32, wherein the identifier of the dedicated PSCCH resource satisfies at least one of the following: is associated with a subchannel sequence at the first position; is related to a subchannel sequence on the resource set excluding a frequency domain position occupied by the common PSCCH resource; corresponding to the Z interleaved resources in the second target frequency range excluding the common PSCCH resources; Corresponding to the identifiers of the Z interleaved resources excluding the frequency domain position occupied by the common PSCCH resource on the resource set.

35. The transmission method according to claim 1, characterized in that: The first unauthorized resource is before or after the target resource, and the target resource is a resource used by other terminals except the first terminal to transmit a side link reference signal.

36. The transmission method according to claim 1, characterized in that: The bandwidth of the first reference signal is a first target frequency domain resource perceived by LBT or a frequency domain resource indicated by a first dedicated resource pool, and the first dedicated resource pool includes one or N resource block sets.

37. The transmission method according to claim 36, characterized in that: When the bandwidth of the first reference signal is a frequency domain resource indicated by the first dedicated resource pool, the method further includes: In the case that the first dedicated resource pool includes one or more resource block sets and there is a resource block set LBT failure, it is determined that the first dedicated resource pool LBT fails.

38. The transmission method according to claim 36, characterized in that: When the bandwidth of the first reference signal is a first target frequency domain resource perceived by the LBT, and the first target frequency domain resource belongs to the frequency domain resource indicated by the first dedicated resource pool, the method further includes: In the case that the first dedicated resource pool includes multiple resource block sets and LBT of at least one resource block set is successful, the resource block set for which LBT of the first dedicated resource pool is successful is determined as the first target frequency domain resource.

39. The transmission method according to claim 1, characterized in that: The method further comprises: When the sending duration of the first reference signal or the first control information sent by the first PSCCH is less than a first time threshold, the type of listen-before-talk LBT is determined.

40. The transmission method according to claim 39, characterized in that: Before the first terminal sends a first reference signal related to a beam in a target frequency range on a first unlicensed resource and sends first control information in a second target frequency range, the method further includes: Through the LBT, it is determined whether the perceived resource is in an idle state.

41. The transmission method according to claim 1, characterized in that: The method further comprises: The COT resource of the first terminal is shared with the second terminal, and the first terminal sends second control information to the second terminal, where the second control information includes relevant information of the COT.

42. The transmission method according to claim 41, characterized in that: The second control information further includes associated information of the first reference signal, and the associated information of the first reference signal includes at least one of the following: Resource identification; Destination address identifier; a request message for the first reference signal; Advertisement type; priority information of the first reference signal; Bandwidth information; Resource pool information; Time-frequency resource indication information.

43. The transmission method according to claim 41, characterized in that: The second control information further includes: The associated information of the second reference signal sent by the second terminal, wherein the associated information of the second reference signal includes at least one of the following: The second terminal sends frequency domain resource indication information of a second reference signal; A resource identifier for sending a second reference signal of the second terminal; priority information of the second terminal for sending the second reference signal; The destination identifier of the second terminal.

44. A transmission device for a side link reference signal, characterized in that: include: A transmission module, configured to send a first reference signal in a first target frequency range of a first unlicensed resource and send first control information in a second target frequency range, wherein the first control information is transmitted on a resource of a first PSCCH, wherein the resource of the first PSCCH is at least one of the following: Public PSCCH resources; Dedicated PSCCH resources.

45. 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, it implements the steps of the side link reference signal transmission method as described in any one of claims 1 to 43.

46. ​​A readable storage medium, characterized in that The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the steps of the side link reference signal transmission method as described in any one of claims 1 to 43 are implemented.

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