Transmission method and device and terminal equipment

Abstract

The invention discloses a transmission method and device and terminal equipment, and belongs to the technical field of communication, and the transmission method comprises the steps that a first terminal sends a first side link reference signal and first control information on an unauthorized frequency band; wherein the first control information is sent in a physical side link control channel (PSCCH) resource associated with the first side link reference signal; the PSCCH resource comprises a dedicated PSCCH resource and / or a public PSCCH resource.

Description

Technical Field

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

[0002] The bandwidths occupied by the sidelink reference signal (SL RS) and the physical sidelink control channel (PSCCH) in the dedicated resource pool are different. The bandwidth of the SL PRS is the bandwidth of the dedicated resource pool, while the bandwidth of the control information in the sidelink is the size of one subchannel. According to the occupied channel bandwidth (OCB) rule, in the unlicensed frequency band, the transmission node must occupy at least 70% (60 GHz) or 80% (5 GHz) of the bandwidth of the entire frequency band during each transmission. However, in the related art, there is a lack of relevant definitions on how terminal devices send sidelink reference signals and control information to meet the OCB rule. Summary of the invention

[0003] The embodiments of the present application provide a transmission method, an apparatus, and a terminal device, which can define the transmission of a sidelink reference signal and sidelink control information to meet the OCB rule.

[0004] In a first aspect, a transmission method is provided, comprising:

[0005] The first terminal sends a first sidelink reference signal and first control information in an unlicensed frequency band;

[0006] The first control information is sent in a physical sidelink control channel PSCCH resource associated with the first sidelink reference signal; the PSCCH resource includes a dedicated PSCCH resource and / or a common PSCCH resource.

[0007] In a second aspect, a transmission device is provided, comprising:

[0008] A sending module, used to send a first sidelink reference signal and first control information in an unlicensed frequency band;

[0009] The first control information is sent in a physical sidelink control channel PSCCH resource associated with the first sidelink reference signal; the PSCCH resource includes a dedicated PSCCH resource and / or a common PSCCH resource.

[0010] In a third aspect, a terminal device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the steps of the transmission method described in the first aspect are implemented.

[0011] In a fourth aspect, a readable storage medium is provided, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the steps of the transmission method described in the first aspect are implemented.

[0012] In a fifth 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 transmission method as described in the first aspect.

[0013] In a sixth aspect, a computer program / program product is provided. 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 steps of the transmission method as described in the first aspect.

[0014] An embodiment of the present application provides a transmission method, by sending a first sidelink reference signal and first control information in an unlicensed frequency band, and controlling the first control information to be sent in a physical sidelink control channel PSCCH resource associated with the first sidelink reference signal, so that the first control information can meet the OCB requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a block diagram of a wireless communication system to which the embodiments of the present application can be applied;

[0016] Figure 2 is a transmission schematic diagram in an embodiment of the present application;

[0017] Figure 3 is a flow chart of a transmission method in an embodiment of the present application;

[0018] Figure 4 is a schematic diagram of a resource structure within a time slot in an embodiment of the present application;

[0019] Figure 5 is a schematic diagram of a resource structure in another time slot in an embodiment of the present application;

[0020] Figure 6 It is a schematic diagram of a resource structure in another time slot in an embodiment of the present application;

[0021] Figure 7 is a schematic diagram of a resource structure in another time slot in an embodiment of the present application;

[0022] Figure 8 It is a schematic diagram of a resource structure in another time slot in an embodiment of the present application;

[0023] Fig. 9 is a structural block diagram of a transmission device in an embodiment of the present application;

[0024] Fig.10 is a structural block diagram of a communication device in an embodiment of the present application;

[0025] Fig.11 It is a structural block diagram of a terminal device in an embodiment of the present application. DETAILED DESCRIPTION

[0026] 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.

[0027] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first" and "second" are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other are in an "or" relationship.

[0028] 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) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following descriptions, but these technologies can also be applied to applications other than NR system applications, such as the 6th generation (6 th Generation, 6G) communication system.

[0029] Figure 1A block diagram of a wireless communication system applicable to the embodiments of the present application is shown. The wireless communication system includes a terminal device 11 and a network side device 12. Among them, the terminal device 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), augmented reality (augmented reality, AR) / virtual reality (virtual reality, VR) equipment, a robot, a wearable device (Wearable Device), a vehicle-mounted equipment (VUE), a pedestrian terminal (PUE), a smart home (home equipment 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, and the wearable device includes: a smart watch, a smart bracelet, a smart headset, a smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), a smart wristband, a smart clothing, etc. It should be noted that the specific type of the terminal device 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 12 may also be referred to as a radio access network device, a radio access network (RAN), a radio access network function or a radio access network unit. The access network device 12 may include a base station, a WLAN access point or a WiFi node, etc. The base station may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a home B node, a home evolved B node, a transmitting and receiving point (TRP) or some other suitable term in the field, as long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary, it should be noted that in the embodiment 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.The core network equipment may include but is not limited to at least one of the following: core network node, core network function, mobility management entity (Mobility Management Entity, MME), access mobility management function (Access and Mobility Management Function, AMF), session management function (Session Management Function, SMF), user plane function (UserPlane 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 (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.

[0030] First, the relevant concepts involved in the embodiments of the present application are introduced:

[0031] The NR system supports sidelink (SL) transmission, which is used for direct data transmission between terminal equipment (UE) without going through network equipment. Figure 2 , shows a transmission schematic diagram. Figure 2As shown, data can be transmitted between the terminal device and the network side device through uplink and / or downlink; data can be transmitted directly on the physical layer between the terminal devices through the sidelink. The 5G NR system supports sidelink transmission modes such as unicast, multicast or groupcast.

[0032] The sidelink in the NR system includes the following channels:

[0033] Physical sidelink control channel (PSCCH), physical sidelink shared channel (PSSCH), physical sidelink broadcast channel (PSBCH), physical sidelink feedback channel (PSFCH).

[0034] NR vehicle to everything (V2X) defines two resource allocation modes: one is that the network side equipment (such as base station) schedules resources (mode 1), and the other is that the UE decides what resources to use for transmission (mode 2). For the resource allocation mode selected by the terminal itself, the terminal can select available transmission resources from the candidate resource information, which may come from the broadcast message or pre-configuration of the base station.

[0035] If the UE works within the service range of the network side device and has an RRC connection with the network side device, the UE can use mode 1 and / or mode 2; if the UE works within the service range of the network side device but has no RRC connection with the base station, only mode 2 can be used. If the UE is outside the service range of the network side device, it can only work in mode 2 and perform V2X transmission according to the pre-configured information.

[0036] In mode 1, the network side device can schedule / activate / release the UE's SL resources based on the downlink control information (DCI); in mode 2, the UE selects resources and indicates the resources selected by the UE through the sidelink control information (SCI). The resource granularity selected by the UE is a time slot in the time domain and a subchannel in the frequency domain.

[0037] In R17 SL, a two-level SCI design is defined. The first-level SCI (that is, SCI format 1-A) is carried in the PSCCH channel, and the content carried may include at least one of the following: priority, frequency domain resource allocation, time domain resource allocation, resource reservation period, demodulation reference signal (DMRS) style, second-level SCI format, beta offset value indication, number of DMRS ports, modulation and coding scheme (MCS), MCS table indication, PSFCH overhead indication, reservation, and conflict information reception flag.

[0038] The second level SCI (i.e. SCI format 2-A, SCI format 2-B, SCI format 2-C) is carried in the PSSCH. The format of the second level SCI is indicated by the first SCI. The second level SCI starts in the symbol of the first DMRS carried in the PSSCH and is mapped in the order of increasing symbols of the PSSCH.

[0039] SCI format 2-A is used for decoding of PSSCH. The feedback information considered includes ACK and NACK scenarios, or NACK-only feedback scenarios, or no feedback scenarios. The content carried by SCI format 2-A includes at least one of the following: HARQ process number, new data indicator, redundancy version, source ID, destination ID, HARQ feedback enabled / disabled indicator, cast type indicator, and channel state information (CSI) request.

[0040] SCI format 2-B is used for decoding of PSSCH, considering the scenario of feedback information only NACK, or the scenario of no feedback information. The content carried by SCI format 2-B includes at least one of the following: HARQ process number, New data indicator, redundancy version, Source ID, Destination ID, HARQ feedback enabled / disabled indicator, zone ID, and communication range requirement.

[0041] SCI format 2-C is used for decoding of PSSCH and carries coordination information between UEs or requests for coordination information between UEs. The content carried by SCI format 2-C includes at least one of the following: HARQ process number, Newdata indicator, redundancy version, Source ID, Destination ID, HARQ feedback enabled / disabled indicator, CSI request, Providing / Requesting indicator. When "Providing / Requesting indicator" is 0, the content carried by SCI format 2-C also includes resource combinations, first resource location, reference slot location, resource set type, and lowest subchannel indices; when "Providing / Requesting indicator" is 1, the content carried by SCI format 2-C also includes priority, number of subchannels, resource reservation period, resource selection window location, resource set type, and padding bit.

[0042] The first-level SCI is carried in the PSCCH, and the second-level SCI is carried in the PSSCH.

[0043] R18 introduces SL PRS signal in positioning for SL positioning. In SL positioning, Scheme 1 supports SL-PRS resource allocation based on network scheduling, and Scheme 2 supports SL-PRS resource allocation based on UE autonomous selection. Dynamic scheduling and configured grant type 1 / type 2 resource allocation are supported in Scheme 1, where DCI can be used for resource scheduling / activation / release. UE autonomously selected resource allocation includes sensing based resource selection and random resource selection. SCI can be used for resource scheduling.

[0044] In addition, the SL PRS signal can be located in a dedicated resource pool or a shared resource pool. If the transmission resources of the SL PRS are located in the dedicated resource pool, only the PSCCH and SL PRS signals exist in the SL PRS dedicated resource pool. A single-stage SCI is used in the dedicated resource pool, and the single-stage SCI is carried in the PSCCH. The single-stage SCI is used to schedule the SL-PRS. If the transmission resources of the SL PRS are located in the shared resource pool, it is necessary to consider backward compatibility with the SL service, that is, to transmit information in the same resource pool as R16 / R17 and reduce the impact on the transmission performance of the R16 / R17 UE. The shared resource pool includes information transmission of PSCCH+PSSCH+SL-PRS. Two-stage SCI scheduling information is used in the shared resource pool. The first-level (1st) SCI is carried on the PSCCH, and the second-level (2nd) SCI is carried on the PSSCH.

[0045] In SL positioning, SL-PRS supports time division multiplexing (TDM) within the slot at the symbol level, and frequency division multiplexing (FDM) within the resource block (RB) / subchannel at the resource element (RE) level, or comb based multiplexing.

[0046] In SL, reference signals can be used for beam training. SL CSI-RS can be used to define beams. Currently, SL CSI-RS has not been defined.

[0047] For SL-U (sidelink in unlicensed spectrum), it is necessary to acquire the channel through Listen before Talk (LBT) before sending SL data. The following is a brief introduction to LBT technology:

[0048] In future communication systems, shared spectrum such as unlicensed bands can be used as a supplement to licensed bands to help operators expand services. In order to be consistent with NR deployment and maximize NR-based unlicensed access, unlicensed bands can operate in 5GHz, 37GHz and 60GHz bands. Since unlicensed bands are shared by multiple technologies (RATs), such as WiFi, radar, LTE-LAA, etc., in some countries or regions, unlicensed bands must comply with regulations when used to ensure that all devices can use the resource fairly, such as LBT, maximum channel occupancy time (MCOT) and other rules. When a transmission node needs to send information, it needs to do LBT first, and perform energy detection (ED) on the surrounding nodes. When the detected power is lower than a threshold, the channel is considered to be idle and the transmission node can send. Otherwise, the channel is considered to be busy and the transmission node cannot send. The transmission node can be a base station, UE, WiFi AP, etc. After the transmission node starts transmitting, the channel occupancy time (COT) cannot exceed MCOT. In addition, according to the restrictions and occupied channel bandwidth (OCB) rules, on the unlicensed band, the transmission node must occupy at least 70% (60GHz) or 80% (5GHz) of the bandwidth of the entire band during each transmission. According to the transmit power requirements, on the unlicensed band, the transmit power of the transmission node in each transmission must meet the power spectral density (PSD) limit.

[0049] The types of LBT commonly used in NRU can be divided into Type1, Type2A, Type2B and Type2C. Among them, Type1 LBT is a channel listening mechanism based on back-off. When the transmission node senses that the channel is busy, it backs off and continues to listen until it senses that the channel is empty. Type2C is that the sending node does not perform LBT, that is, no LBT or immediate transmission. Type2A and Type2B LBT are one-shot LBT, that is, the node performs LBT once before transmission, and transmits if the channel is empty, and does not transmit if the channel is busy. The difference is that Type2A performs LBT within 25us, which is applicable when the gap between two transmissions is greater than or equal to 25us when the COT is shared. Type2B performs LBT within 16us, which is applicable when the gap between two transmissions is equal to 16us when the COT is shared. In addition, there is Type 2 LBT, which is applicable to LAA / eLAA / FeLAA. When sharing COT, the gap between two transmissions is greater than or equal to 25us, and eNB and UE can use Type 2 LBT. In addition, in frequency range 2-2, the types of LBT are Type 1, Type 2 and Type 3. Type 1 is a channel listening mechanism based on fallback, Type 2 is one-shot LBT, and 5us LBT is performed within 8us, and Type 3 does not perform LBT.

[0050] LBT includes two types: frame-based equipment (FBE) and load-based equipment (LBE):

[0051] 1) Operation of FBE

[0052] A frame-based device refers to a device whose transmission / reception timing adopts a periodic structure, and its period is a fixed frame period (FFP). FBE nodes use a channel access mechanism based on LBT to occupy the channel. The node that initiates a transmission sequence containing one or more continuous transmissions is called an initiating node (Initiating Device), and the other nodes are called responding nodes (Responding Device). FBE nodes can be initiating nodes, responding nodes, or support both node functions.

[0053] 2) Operation of LBE

[0054] For LBE, the transmitting node can start LBT at any time and can only transmit after it detects that the channel is empty. For the transmitting node, there is no fixed listening time, and it does not need to skip when it detects that the channel is busy. It can continue to listen by backoffing several eCCAs until the eCCA counter is zero.

[0055] On SL, LBE in the unlicensed frequency band can be used for channel access and information transmission.

[0056] The transmission method provided in the embodiment of the present application is described in detail below through some embodiments and their application scenarios in combination with the accompanying drawings.

[0057] In a first aspect, an embodiment of the present application provides a transmission method. Figure 3 , shows a flow chart of a transmission method provided by an embodiment of the present application. Figure 3 As shown, the method may specifically include:

[0058] Step 301: A first terminal sends a first sidelink reference signal and first control information in an unlicensed frequency band.

[0059] The first control information is sent in a physical sidelink control channel PSCCH resource associated with the first sidelink reference signal; the PSCCH resource includes a dedicated PSCCH resource and / or a common PSCCH resource.

[0060] It is understandable that the unlicensed frequency bands may be 5 GHz, 37 GHz and 60 GHz frequency bands. The first sidelink reference signal in the embodiment of the present application may be a sidelink positioning reference signal (sidelink Positioning Reference Signal, SL-PRS), or a sidelink channel state information reference signal (sidelink Channel State Information-Reference Signal, SL CSI-RS), or the first sidelink reference signal may be a reference signal associated with the FR2 beam. The first control information may be an SCI, or other control information in the sidelink transmission.

[0061] The first sidelink reference signal is sent in a first target frequency range; the first target frequency range includes at least one of the following:

[0062] A frequency domain range included in the first dedicated resource pool;

[0063] One or N1 resource block sets in the first dedicated resource pool, where N1 is less than or equal to the N.

[0064] Optionally, it can be understood that the first target frequency domain range includes a guard band between adjacent resource block sets, and N1 is an integer greater than 1.

[0065] The dedicated PSCCH resource includes at least one of the following frequency domain ranges:

[0066] a subchannel of a second target frequency range;

[0067] N1 subchannels on N1 resource block sets of a second target frequency range;

[0068] A plurality of PRBs at a predetermined frequency domain interval in a second target frequency range;

[0069] A plurality of PRBs with a predetermined frequency domain interval on each resource block set of the second target frequency range.

[0070] The common PSCCH resource includes at least one of the following frequency domain ranges:

[0071] a subchannel of a third target frequency range;

[0072] N1 subchannels on N1 resource block sets of a third target frequency range;

[0073] A plurality of PRBs at a predetermined frequency domain interval in a third target frequency range;

[0074] A plurality of PRBs with a predetermined frequency domain interval on each resource block set in the third target frequency range.

[0075] The second target frequency range and the third target frequency range are less than or equal to the first target frequency range.

[0076] The second target frequency range includes at least one of the following:

[0077] A frequency domain range included in the first dedicated resource pool;

[0078] One or N2 resource block sets in the first dedicated resource pool, where N2 is an integer greater than 1.

[0079] The second target frequency range is less than or equal to the first target frequency range.

[0080] Optionally, the second target frequency range is less than or equal to the first target frequency range, the second target frequency range does not include a guard band between adjacent resource block sets, and N2 is an integer greater than 1.

[0081] The third target frequency range includes at least one of the following:

[0082] A frequency domain range included in the second dedicated resource pool;

[0083] One or N2 resource block sets in the second dedicated resource pool, where N2 is an integer greater than 1.

[0084] The third target frequency range is smaller than or equal to the first target frequency range. The first dedicated resource pool and the second dedicated sub-resource pool may be the same resource pool or different resource pools.

[0085] Optionally, the third target frequency range is less than or equal to the first target frequency range, the third target frequency range does not include a guard band between adjacent resource block sets, and N2 is an integer greater than 1.

[0086] Optionally, the third target frequency range is equal to the second target frequency range.

[0087] Optionally, the dedicated PSCCH resource is a frequency domain resource of a sub-channel.

[0088] Optionally, the dedicated PSCCH resource includes at least one interleaved resource.

[0089] Among them, one interleaved resource includes at least two target physical resource blocks, and the interval between adjacent target physical resource blocks is a preset frequency domain interval. In an embodiment of the present application, the dedicated PSCCH resource can be a plurality of PRBs with a predetermined frequency domain interval in the second target frequency range; that is, X interleaved resources, through the interleaved resources, meet the OCB requirements on the symbol carrying the PSCCH, and X is a positive integer.

[0090] The location of the common PSCCH resource may be a preconfigured location or a location specified by the protocol. Optionally, the frequency domain location of the common PSCCH resource includes at least one of the following:

[0091] A1, the highest frequency domain position and / or the lowest frequency domain position of the subchannels included in the resource pool;

[0092] A2, the highest frequency domain position and / or the lowest frequency domain position of the subchannel included in the resource set of the resource pool;

[0093] A3, the resource pool includes X1 interleaved resources, one interleaved resource includes at least two target physical resource blocks, the interval between adjacent target physical resource blocks is a preset frequency domain interval, and X1 is a positive integer;

[0094] A4. A resource set of the resource pool includes X2 interleaved resources, and an interleaved resource includes at least two target physical resource blocks in the resource set. The interval between adjacent target physical resource blocks is a preset frequency domain interval.

[0095] Regarding item A1, it can be understood that in a given time domain or frequency domain, a slot belongs to only one resource pool (it can also be understood that different resource pools can be completely distinguished); in this way, there is a commonly understood resource pool size on a specific resource block set (RBset), so that the highest and / or lowest position of the resource pool in the frequency domain can be determined.

[0096] Optionally, the resource pool is (pre) configured to include N1 resource sets, or is (pre) configured to include M1 PRBs, or is (pre) configured to include K1 sub-channels.

[0097] Optionally, the resource pool is (pre)configured with public PSCCH resources and dedicated PSCCH resources. The terminal selects the target dedicated resource to transmit the second information. If the first terminal is a terminal occupying COT, or the COT terminal instructs the second terminal to send the COT-related information, the first terminal transmits the COT-related information on the public PSCCH resource.

[0098] Optionally, the frequency domain position of the common PSCCH resource includes the highest frequency domain position and / or the lowest frequency domain position of the resource pool corresponding to the target subchannel, and the highest frequency domain position or the lowest frequency domain position does not include the physical resource block within the cell guard band (intra cell guard band).

[0099] Optionally, the frequency domain position of the common PSCCH resource includes the highest frequency domain position and / or the lowest frequency domain position of the resource pool corresponding to the target subchannel. When the second target resource includes the guard band, the highest frequency domain position or the lowest frequency domain position includes the physical resource block within the cell guard band (intra cell guard band).

[0100] For item A3, optionally, if the adjacent target PRBs belong to different resource sets (RB sets), the intracell guard band is not considered, and it can be understood that the common 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 common resource is the above-mentioned 20M + 20M position, then the common resource is (pre) configured for the second target frequency domain resource, that is, one second target frequency domain resource has at least one common PSCCH resource.

[0101] For item A4, optionally, if the adjacent target PRBs belong to one RB set, the common resources are (pre)configured for each RB set, that is, each RB set has at least one common PSCCH resource, such as Figure 8 As shown, each RB set includes common PSCCH resources. It is worth noting that Figure 8 The figure shows an example of common PSCCH resources, which also includes (pre-)configured frequency domain positions on other RB sets.

[0102] Taking the first sidelink reference signal as SL PRS and the first control information as SCI as an example, refer to Figure 4 , which shows a schematic diagram of the resource structure within a time slot. Figure 4 As shown in the figure, the bandwidth occupied by SLPRS and PSCCH in the dedicated resource pool is different. The bandwidth of SL PRS is the bandwidth of the dedicated resource pool, while SCI is the size of 1 subchannel. If SL PRS directly reuses the transmission resources of SCI, it will cause OCB mismatch problem, that is, it will not meet the requirement that the transmission node in the unlicensed frequency band must occupy at least 70% (60GHz) or 80% (5GHz) of the bandwidth of the entire frequency band in each transmission.

[0103] Reference Figure 5 , shows another schematic diagram of resource structure in a time slot. Figure 5 As shown, in the embodiment of the present application, in addition to sending an SCI associated with the SL PRS, the first terminal can also send a shared SCI to meet the OCB requirement. The common SCI can be sent at the position of the last candidate PSCCH, or at the top of the frequency domain position.

[0104] Reference Figure 6 , shows another schematic diagram of resource structure in a time slot. Figure 6 As shown, in the embodiment of the present application, in addition to sending the SCI associated with the SL PRS, the first terminal can also send two common SCIs to meet the requirements of OCB. Among them, the common SCI is sent at the positions of the last and first candidate PSCCH, or at the top and bottom of the frequency domain position, to meet the requirements of OCB.

[0105] In addition, combined Figure 4 and Figure 5 The candidate position of the dedicated PSCCH is different from the common PSCCH resource, and the dedicated PSCCH resource is a resource determined after removing the common PSCCH resource. Optionally, the dedicated PSCCH resource index is also determined based on the candidate dedicated PSCCH resource.

[0106] Optionally, the candidate position of the dedicated PSCCH is different from the frequency domain resource of the common PSCCH, and is the resource determined after removing the common PSCCH resource. Optionally, the dedicated PSCCH resource occupies the interlaced PRBs (e.g., the dedicated PSCCH resource is X interlaced resources, where the interval between adjacent resources of the interlaced resources is Y PRBs), and X1 interlaced resources after removing the common PSCCH resource.

[0107] Reference Figure 7 , shows another schematic diagram of resource structure in a time slot. Figure 7 As shown, in an embodiment of the present application, in addition to sending the first SCI associated with the SL PRS, the first terminal can also send a common second SCI, so as to meet the requirements of OCB. Among them, the common second SCI occupies the spaced PRBs in an interlaced manner, that is, the target physical resource block in the embodiment of the present application. The interval between two adjacent target PRBs is Y PRBs, and the PRBs of the first SCI are continuous PRBs other than the target PRBs used for the second SCI, so as to meet the requirements of OCB. In a possible embodiment, Y is related to the subcarrier spacing, or Y is a preconfigured value. Optionally, the frequency domain position, content, size, etc. of the common second SCI can be predefined by the protocol or preconfigured by the high-level layer of the first terminal.

[0108] In addition, combined Figure 7The candidate position of the dedicated PSCCH is different from the frequency domain resource of the common PSCCH, and is the resource determined after removing the common PSCCH resource. Optionally, the dedicated PSCCH resource is a continuous PRB, which is a continuous PRB after removing the common PSCCH resource.

[0109] Optionally, the candidate position of the dedicated PSCCH is different from the frequency domain resources of the common PSCCH, and is the resource determined after removing the common PSCCH resources. Optionally, the dedicated PSCCH resources occupy the interlaced PRBs (e.g., the dedicated PSCCH resources are X interlaced resources, where the interval between adjacent resources of the interlaced resources is Y PRBs), and the X1 interlaced resources after removing the common PSCCH resources. In other words, the interlaced resources occupied by the dedicated PSCCH resources are different from the interlaced resources of the common resources.

[0110] Optionally, the candidate position of the dedicated PSCCH is different from the frequency domain resource of the common PSCCH, and is the resource determined after removing the common PSCCH resource. Optionally, the dedicated PSCCH resource also occupies the interlaced PRBs (e.g., the dedicated PSCCH resource is X interlaced resources, where the interval between adjacent resources of the interlaced resource is Y PRBs), and X1 interlaced resources after removing the common PSCCH resource. In other words, the interlaced resources occupied by the dedicated PSCCH resource are different from the interlaced resources of the common resources.

[0111] In the embodiment of the present application, the first terminal may send the first sidelink reference signal and the first control information in the unlicensed frequency band. If the first control information is still Figure 4 If only one sub-channel is occupied, the OCB requirement cannot be met. Figure 5 to Figure 7 It is proposed that the first control information is carried on the common PSCCH resource and the dedicated PSCCH resource respectively, and the first control information can meet the OCB requirement through the distribution of the frequency domain resources of the two.

[0112] It is worth noting that, in an optional embodiment, the first control information is included in each time slot of the channel resources occupied by the first channel. In another embodiment, there are time slots in which only the Xth control information is carried on the dedicated PSCCH resources, that is, the common PSCCH resources do not send information in certain time slots; in another embodiment, there are time slots in which the first terminal neither sends the first sidelink reference signal nor the first control information; in another embodiment, there are time slots in which the first terminal only sends the first control information carried on the common PSCCH resources, does not send the first sidelink reference signal, and may also send the Xth control information carried on the dedicated PSCCH resources.

[0113] In an optional embodiment of the present application, the PSCCH resource carries first information, and the first information is used to indicate the channel resources occupied by the first terminal.

[0114] The first information includes at least one of the following:

[0115] The remaining channel occupation time of the first terminal;

[0116] a channel access priority class (CAPC) used by the first terminal;

[0117] a source terminal identifier or a target terminal identifier that shares the channel resources occupied by the first terminal;

[0118] Frequency domain information associated with the channel resources;

[0119] A first indication, wherein the first indication is used to indicate that a second terminal shares channel resources occupied by the first terminal to perform positioning services or send a second sidelink reference signal and a second control information, and / or, the first indication is used to indicate conditions for other terminals to share channel resources occupied by the first terminal.

[0120] Exemplarily, the frequency domain information associated with the channel resources occupied by the first terminal may be frequency domain information corresponding to the resource set occupied by the first terminal. The first information may be N bits, used to indicate the resource set occupied by the first terminal, or to indicate the resource block (BB), resource pool (resource pool), and bandwidth part (Band WidthPart, BWP) monitored using LBT.

[0121] 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.

[0122] The first information is used to indicate channel resources occupied by the first terminal.

[0123] The first information includes at least one of the following:

[0124] The remaining channel occupation time of the first terminal;

[0125] a channel access priority class (CAPC) used by the first terminal;

[0126] an identifier of a source terminal or an identifier of a target terminal that shares the channel resources occupied by the first terminal;

[0127] Frequency domain information associated with the channel resources;

[0128] A first indication, wherein the first indication is used to indicate that a second terminal shares channel resources occupied by the first terminal to perform positioning services or send a second sidelink reference signal and a second control information, and / or, the first indication is used to indicate conditions for other terminals to share channel resources occupied by the first terminal.

[0129] Exemplarily, the frequency domain information associated with the channel resources occupied by the first terminal may be frequency domain information corresponding to the resource set occupied by the first terminal. The first information may be N bits, used to indicate the resource set occupied by the first terminal, or to indicate the resource block (BB), resource pool (resource pool), and bandwidth part (Band WidthPart, BWP) monitored using LBT.

[0130] The second terminal in the embodiment of the present application may be a terminal device other than the first terminal. The first indication may indicate that the second terminal sending the sidelink reference signal may share the channel resources occupied by the first terminal, or indicate that the second terminal that reserved the channel resources occupied by the first terminal in the preamble may continue to use the channel resources occupied by the first terminal to send the sidelink reference signal, and so on.

[0131] In an optional embodiment of the present application, if the common PSCCH resources are distributed in at least two resource sets, the first control information is sent in the common PSCCH resources in each resource set, such as Figure 8 The resource structure diagram is shown.

[0132] It can be understood that when the resource pool includes multiple resource sets (RE sets), the frequency domain position of the common PSCCH resources in each RE set is preconfigured or predefined, for example, the first subchannel in the RE set is determined as the frequency domain position of the common PSCCH resources.

[0133] If the first terminal occupies N resource sets, the first control information in the N RB sets will be repeatedly received N times and placed in each RB set.

[0134] If the first terminal occupies N resource sets, the first control information (such as the first information) sent by the common PSCCH resource in the N RB sets will be repeatedly received N times and placed in each RB set.

[0135] Optionally, each resource set of the common PSCCH resources contains the same information, such as repeatedly sending the first information.

[0136] Optionally, the location of the common PSCCH resource is determined according to the number of physical resource blocks or the number of subchannels included in each resource set of the resource pool.

[0137] Optionally, the frequency domain position of the dedicated PSCCH resource is different from the frequency domain position of the common PSCCH resource. For example, the dedicated PSCCH resource and the common PSCCH resource occupy different subchannels and different interleaving resources (one interleaving resource includes multiple PRBs with an interval of Y1 PRBs).

[0138] In a possible embodiment, the frequency domain resource of the dedicated PSCCH resource is a sub-channel resource determined after excluding the frequency domain resource of the common PSCCH resource, for example, one sub-channel resource.

[0139] In a possible embodiment, the frequency domain resources of the dedicated PSCCH resources are X1 interleaved resources determined after excluding the frequency domain resources of the common PSCCH resources. Optionally, adjacent resources of an interleaved resource are spaced by Y1 PRBs.

[0140] In an optional embodiment of the present application, the transmit power of the PSCCH resource satisfies at least one of the following:

[0141] The transmit power of the dedicated PSCCH resource is equal to the transmit power of the first sidelink reference signal;

[0142] The transmit power of the common PSCCH resource is equal to the transmit power of the first sidelink reference signal;

[0143] The sum of the transmit power of the dedicated PSCCH resources and the transmit power of the common PSCCH resources is equal to the transmit power of the first sidelink reference signal.

[0144] Optionally, if the transmit power on the symbol included in the PSCCH resource is different from the transmit power on the symbol of the first sidelink reference signal, at least an AGC symbol or a GP (guard period) symbol is included between the symbols of the PSCCH and the first sidelink reference signal. The GP symbol is located after the last symbol of the PSCCH. The AGC symbol is located before the first symbol of the first sidelink reference signal.

[0145] Optionally, if the transmit power on the symbol included in the PSCCH resource is different from the transmit power on the symbol of the first sidelink reference signal, an AGC symbol and a GP (guard period) symbol are included between the PSCCH and the symbols of the first sidelink reference signal. The GP symbol is located after the last symbol of the PSCCH. The AGC symbol is located before the first symbol of the first sidelink reference signal.

[0146] In the embodiment of the present application, the transmission power P of the dedicated PSCCH resource is PSCCH = Transmit power P of the first sidelink reference signal sl-prs , and / or, the transmission power P of the common PSCCH resource CCOMMoN = Transmit power P of the first sidelink reference signal sl-prs .

[0147] Alternatively, the transmit power P of the dedicated PSCCH resource PSCCH + Transmit power P of common PSCCH resources CCOMMON = Transmit power P of the first sidelink reference signal sl-prsAlternatively, the transmission power of the first PSCCH is equal to the transmission power P of the first sidelink reference signal. sl-prs .

[0148] As an example, the transmit power of the dedicated PSCCH resource at occasion i may be calculated based on the transmit power of the first sidelink reference signal, which may be specifically expressed as:

[0149]

[0150] Among them, P sl-prs (i) is the transmit power of the first sidelink reference signal (taking SL-PRS as an example) at time i; is the number of RBs occupied by the first sidelink reference signal; is the number of RBs of dedicated PSCCH resources.

[0151] The transmit power of the common PSCCH resource at time i can be calculated based on the transmit power of the first sidelink reference signal, which can be specifically expressed as:

[0152]

[0153] Among them, P sl-prs (i) is the transmit power of the first sidelink reference signal (taking SL-PRS as an example) at time i; is the number of RBs occupied by the first sidelink reference signal; is the number of RBs of common PSCCH resources.

[0154] The transmission power of the common PSCCH resource at time i can be calculated based on the transmission power of the dedicated PSCCH resource at time i, which can be specifically expressed as:

[0155]

[0156] Among them, P PSCCH (i) is the transmit power of the dedicated PSCCH resource at occasion i, is the number of RBs of common PSCCH resources; is the number of RBs of dedicated PSCCH resources.

[0157] The transmission power of the common PSCCH resource at occasion i can be calculated based on the transmission power of the first PSCCH resource at occasion i, which can be specifically expressed as:

[0158]

[0159] in, is the number of RBs of common PSCCH resources. ; is the number of RBs of the first PSCCH resource, P 第一PSCCH (i) is the transmission power of the first PSCCH resource at occasion i.

[0160] The transmit power of the dedicated PSCCH resource at occasion i can be calculated based on the transmit power of the first PSCCH resource at occasion i, which can be specifically expressed as:

[0161]

[0162] in, is the number of RBs of the first PSCCH resource, P 第一PSCCH (i) is the transmission power of the first PSCCH resource at occasion i. PSCCH (i) is the transmit power of the dedicated PSCCH resource at occasion i; is the number of RBs of dedicated PSCCH resources. 第一PSCCH (i) The transmission power of the first PSCCH is determined based on the transmission power P of the first sidelink reference signal. sl-prs Calculated.

[0163] As an example, the P 第一PSCCH (i) The transmission power of the first PSCCH is determined based on the transmission power P of the first sidelink reference signal. sl-prs The calculated result can be expressed as:

[0164]

[0165] Among them, P sl-prs (i) is the transmit power of the first sidelink reference signal (taking SL-PRS as an example) at time i; is the number of RBs occupied by the first sidelink reference signal; is the RB number of the first PSCCH.

[0166] As another example, the sum of the transmit power of the dedicated PSCCH resource and the transmit power of the common PSCCH resource can be calculated according to the transmit power of the first sidelink reference signal, which can be specifically expressed as:

[0167]

[0168] Among them, P sl-prs (i) is the transmit power of the first sidelink reference signal (taking SL-PRS as an example) at time i; is the number of RBs occupied by the first sidelink reference signal; It is the sum of the RB numbers of dedicated PSCCH resources and common PSCCH resources.

[0169] Optionally, in the example, the first PSCCH may be equivalent to the sum of the transmit power of the PSCCH resource and the transmit power of the common PSCCH resource, that is, P 第一PSCCH (i) Equivalent to P COMMON+PSCCH (i); Optionally, in another example, the first PSCCH may be equivalent to one of the transmit power of the PSCCH resource and the transmit power of the common PSCCH resource, that is, P 第一PSCCH (i) Equivalent to P COMMIN (i) or P PSCCH (i) That is, when the first control information only includes dedicated PSCCH resources, the P 第一PSCCH (i) Equivalent to P PSCCH (i); The first control information includes dedicated PSCCH resources and shared PSCCH resources, P 第一PSCCH (i) Equivalent to P COMMON (i) and P PSCCH (i) The sum.

[0170] In an optional embodiment of the present application, a transmit power spectral density (Tx power spectral / spectrum density, TX PSD) of the PSCCH resource is related to a transmit power spectral density of the first sidelink reference signal.

[0171] Optionally, the transmit power spectral density of the PSCCH resource is the power of resource elements RE of the resource block occupied by the PSCCH; the transmit power spectral density of the first sidelink reference signal is the average power of resource elements RE of the resource block occupied by the first sidelink reference signal.

[0172] Optionally, the transmission power of the PSCCH resource on the resource element used to transmit the PSCCH is the same as the transmission power of the first sidelink reference signal on the resource element used to transmit the first sidelink reference signal.

[0173] The transmit power of the PSCCH resource on each resource element (per RE) is the same as the transmit power of the first side link signal on each RE, which may specifically include: the transmit power of the dedicated PSCCH resource on each resource element (per RE) is the same as the transmit power of the first side link signal on each RE, and / or the transmit power of the common PSCCH resource on each resource element (perRE) is the same as the transmit power of the first side link signal on each RE.

[0174] The transmit power of the PSCCH resource on each resource block (per RB) is the same as the transmit power of the first sidelink signal on each RB, which may specifically include: the transmit power of the dedicated PSCCH resource on each resource block (per RB) is the same as the transmit power of the first sidelink signal on each resource block (per RB), and / or the transmit power of the common PSCCH resource on each resource block (per RB) is the same as the transmit power of the first sidelink signal on the resource block (per RB).

[0175] Optionally, the transmit power spectrum density of the dedicated PSCCH resource satisfies at least one of the following:

[0176] The transmit power spectral density of the first sidelink reference signal is N times the transmit power spectral density of the dedicated PSCCH resource, where the value of N is equal to the comb size of the first sidelink reference signal;

[0177] The transmit power spectral density of the first sidelink reference signal is the same as the transmit power spectral density of the dedicated PSCCH resource;

[0178] The value of N includes any of the following:

[0179] The value of N is equal to the comb size of the first sidelink reference signal;

[0180] The value of N is related to a preset frequency domain interval between adjacent shared resources or a comb size of the first sidelink reference signal.

[0181] Optionally, the transmit power spectrum density of the common PSCCH resource satisfies at least one of the following:

[0182] The transmit power spectral density of the first sidelink reference signal is N times the transmit power spectral density of the common PSCCH resource;

[0183] A transmit power spectral density of the first sidelink reference signal is the same as a transmit power spectral density of the common PSCCH resource.

[0184] The value of N includes any of the following:

[0185] The value of N is equal to the comb size of the first sidelink reference signal;

[0186] The value of N is related to a preset frequency domain interval between adjacent shared resources or a comb size of the first sidelink reference signal.

[0187] Optionally, the transmit power of the common PSCCH resource satisfies at least one of the following:

[0188] The transmit power of the common PSCCH resource is determined according to the bandwidth occupied by the common PSCCH resource;

[0189] The transmission power of the common PSCCH resource is less than or equal to a first preset value.

[0190] In an optional embodiment of the present application, the transmit power P of the dedicated PSCCH resource is PSCCH (i) include at least one of the following:

[0191] P CMAX , P MAX,CBR With P PScCH，SL (i) The minimum power in

[0192] P CMAX With P PSCCH，SL (i) The minimum power in

[0193] P CMAX With P PSCCH,DL (i) The minimum power in

[0194] Optionally, if the transmit power P of the dedicated PSCCH resource PSCCH (i) is P PSCCH，SL (i) or P PSCCH,DL (i); i.e. not greater than the P CMAX , P MAX,CBR ; However, the sum of the dedicated PSCCH resources and the public PSCCH resources is greater than the P CMAX , P MAX,CBR The transmit power on the dedicated PSCCH resources and the common resources is adjusted (or scaled) equally.

[0195] Optionally, at least one of the dedicated PSCCH resources and the public PSCCH resources or the sum of the dedicated PSCCH resources and the public PSCCH resources is within a certain bandwidth. The internal transmission power does not exceed a first threshold (eg, 10 dBM).

[0196] Optional, is smaller than the first threshold.

[0197] Optional, is less than the first threshold.

[0198] Optional, is smaller than the first threshold.

[0199] Furthermore, if at least one of the dedicated PSCCH resources and the common PSCCH resources or the sum of the dedicated PSCCH resources and the common PSCCH resources is within a certain bandwidth If the internal transmission power is greater than the first threshold, the transmission power of the PSCCH is adjusted so that

[0200] In the embodiment of the present application, the transmit power of the dedicated PSCCH resource can be expressed as:

[0201] min(P CMAX ,P MAX,CBR ,P PSCCH，SL (i))[dBm] (8)

[0202] Alternatively, the transmit power of a dedicated PSCCH resource may be expressed as:

[0203] min(P CMAX ,P PSCCH,SL (i))[dBm] (9)

[0204] Alternatively, the transmit power of a dedicated PSCCH resource may be expressed as:

[0205] min(P CMAX ,P PSCCH,DL (i))[dBm] (10)

[0206] Among them, P CMAX is the maximum transmit power of the first terminal or the maximum transmit power allowed by the first terminal in the unlicensed frequency band; P MAX,CBR is the maximum transmission power of the first terminal in consideration of the channel congestion rate; PSCCH，SL (i) is the transmit power of the dedicated PSCCH resource at time i taking into account the side link loss; P PScCH,DL (i) is the transmit power of the dedicated PSCCH resource at time i taking into account downlink loss.

[0207] P PSCCH,DL (i) Determined according to the downlink path loss, which can be specifically expressed as:

[0208]

[0209] Among them, P O,D ,α D is the power adjustment factor of the first sidelink reference signal (taking SL PRS as an example) or the power adjustment factor of the dedicated PSCCH resource calculated according to the downlink path loss; is the number of RBs dedicated to PSCCH resources; PL D =PL b,f,c (q d ), is based on the signal q d Calculated downlink path loss.

[0210] For example, the signal q d This may include at least one of the following:

[0211] SS / PBCH block corresponding to MIB;

[0212] The device uses RS to determine the transmit power of the PUSCH scheduled in DCI format 0_0.

[0213] P PSCCH，SL (i) Determined according to the sidelink line loss, specifically:

[0214] min(P CMAX ,P MAX,CBR ,P PSCCH，SL (o)) (12)

[0215] Or, pSCCH，SL (i) may be:

[0216] min(P CMAX ,P MAX,CBR ,min(P PSCCH,DL (i),P PSCCH,SL (i)))[dBm] (13)

[0217] Among them, P PSCCH,SL (i) Calculated according to the following formula:

[0218]

[0219] P O,SL ,α SL is a power adjustment factor of a first sidelink reference signal (taking SL PRS as an example) or a power adjustment factor of a dedicated PSCCH resource calculated according to the sidelink path loss; is the number of RBs occupied by the dedicated PSCCH; P L is based on the sidelink signal q d Calculated sidelink loss.

[0220] Where, PL = referenceSignalPower – higher layer filtered RSRP, or PL = referenceSignalPower – L1 RSRP. referenceSignalPower is the transmit power of the path loss reference signal, and higher layer filtered RSRP is the receive path loss reference signal q calculated based on the high layer filter coefficient and the physical layer receive power. SL Received RSRP; L1 RSRP is the received path loss reference signal q SL Receive L1 RSRP.

[0221] Path loss reference signal q SL Include at least one of the following:

[0222] Demodulation reference signal DMRS of PSCCH;

[0223] DMRS of PSSCH;

[0224] SL-PRS.

[0225] Optionally, the method further includes: the first terminal calculating the transmission power of the common PSCCH resources based on the transmission power of the dedicated PSCCH resources.

[0226] In the embodiment of the present application, the transmit power of the common PSCCH may be calculated based on the transmit power of the dedicated PSCCH resources, the number of RBs of the dedicated PSCCH resources, and the number of RBs of the common PSCCH resources.

[0227] Exemplarily, the transmit power of the common PSCCH resource at time i can be expressed as:

[0228]

[0229] Among them, P PSCCH (i) is the transmit power of the dedicated PSCCH resource at occasion i; is the number of RBs of dedicated PSCCH resources; is the number of RBs of common PSCCH resources.

[0230] In an optional embodiment of the present application, the transmit power of the common PSCCH resource includes at least one of the following:

[0231] P CMAX , P MAX,CBR With P COMMON，SL (i) The minimum power in

[0232] P CMAX With P COMMON，SL (i) The minimum power in

[0233] P CMAX With P COMMON,DL (i) The minimum power in

[0234] In the embodiment of the present application, the transmission power of the common PSCCH resource can be expressed as:

[0235] min(P CMAX ,P MAX,CBR ,P COMMON，SL (i)) (16)

[0236] Alternatively, the transmit power of the common PSCCH resource can be expressed as:

[0237] min(P CMAX ,P COMMON,SL (i))[dBm] (17)

[0238] Alternatively, the transmit power of the common PSCCH resource can be expressed as:

[0239] min(P CMAX ,P COMMON,DL (i))[dBm] (18)

[0240] Among them, P CMAX is the maximum transmit power of the first terminal or the maximum transmit power allowed by the first terminal in the unlicensed frequency band; P MAX,CBR is the maximum transmission power of the first terminal in consideration of the channel congestion rate; COMMON，SL (i) is the transmit power of the common PSCCH resource at time i taking into account the side link loss; P COMMON,DL (i) is the transmission power of the common PSCCH resource at time i when downlink loss is taken into account.

[0241] Optionally, the first terminal calculates the transmit power of the common PSCCH resource according to the transmit power of the dedicated PSCCH resource, including:

[0242] The first terminal determines the transmit power of the common PSCCH resource according to the transmit power of the dedicated PSCCH resource, the frequency domain size of the common PSCCH resource and the frequency domain size of the dedicated PSCCH resource; or,

[0243] The first terminal determines the transmit power spectral density of the common PSCCH resources according to the transmit power spectral density of the dedicated PSCCH resources.

[0244] In an optional embodiment of the present application, the PSCCH resource includes a dedicated PSCCH resource and a common PSCCH resource; and the transmit power of the PSCCH resource includes at least one of the following:

[0245] P CMAX , P MAX,CBR With P PScCH+COMMON，SL (i) The minimum power in

[0246] P CMAX With P PSCCH+COMMON，SL (i) The minimum power in

[0247] P CMAX With P PSCCH+COMMON,DL (i) The minimum power in

[0248] In the embodiment of the present application, the sum of the transmission power of the dedicated PSCCH resource and the common PSCCH resource is CCOMMON+PSCCH (i) can be expressed as:

[0249] min(P CMAX ,P MAX,CBR ,P PSCCH+COMMON，SL (i))[dBm] (19)

[0250] Or, the sum of the transmit power of the dedicated PSCCH resource and the common PSCCH resource P CCOMMON+PSCCH (i) can be expressed as:

[0251] min(P CMAX ,P PSCCH+COMMON,SL (i))[dBm] (20)

[0252] Or, the sum of the transmit power of the dedicated PSCCH resource and the common PSCCH resource P CCOMMON+pscCH (i) can be expressed as:

[0253] min(P CMAX ,P PSCCH+CO,MON,DL (i))[dBm] (21)

[0254] Among them, P CMAX is the maximum transmit power of the first terminal or the maximum transmit power allowed by the first terminal in the unlicensed frequency band; P MAX,CBR is the maximum transmission power of the first terminal in consideration of the channel congestion rate; PSCCH+COMMON，SL (i) is the transmit power of the PSCCH resource at time i, taking into account the side link loss; P PSCCH+COMMON,DL (i) is the transmission power of the PSCCH resource at time i when downlink loss is taken into account.

[0255] P PSCCH+COMMON,DL (i) Determined based on the downlink path loss, the specific amount can be expressed as:

[0256]

[0257] Among them, P O,D ,α D is the power adjustment factor of the first sidelink reference signal (taking SL PRS as an example) or the power adjustment factor of PSCCH (including dedicated PSCCH and common PSCCH) calculated according to the downlink path loss; It is the sum of the RB numbers of dedicated PSCCH resources and common PSCCH resources; PL D =PL b,f,c (q d ), is based on the signal qd Calculated downlink path loss.

[0258] For example, the signal q d This may include at least one of the following:

[0259] SS / PBCH block corresponding to MIB;

[0260] The device uses RS to determine the transmit power of the PUSCH scheduled in DCI format 0_0.

[0261] P PSCCH+common，sL (i) Determined according to the sidelink line loss, specifically:

[0262] min(P CMAX ,P MAX,CBR ,P PSCCH+common，SL (i)) (23)

[0263] Or, it can be:

[0264] min(P CMAX ,P MAX,CBR ,min(P PSCCH+common,DL (i),P PSCCH+common,SL (i)))[dBm] (24)

[0265] Among them, it is calculated according to the following formula:

[0266]

[0267] P O,SL ,α SL is a power adjustment factor of a first sidelink reference signal (taking SL PRS as an example) or a power adjustment factor of a PSCCH resource (including a dedicated PSCCH resource and a common PSCCH resource) calculated according to the sidelink path loss; It is the sum of the RB numbers of dedicated PSCCH resources and common PSCCH resources; PL is based on the sidelink signal q d Calculated sidelink loss.

[0268] Where, PL = referenceSignalPower – higher layer filtered RSEP, or PL = referenceSignalPower – L1 RSRP. referenceSignalPower is the transmit power of the path loss reference signal, and higher layer filtered RSRP is the receive path loss reference signal q calculated based on the high-layer filter coefficient and the physical layer receive power. SLReceived RSRP; L1 RSRP is the received path loss reference signal q SL Receive L1 RSRP.

[0269] Path loss reference signal q SL Include at least one of the following:

[0270] Demodulation reference signal DMRS of PSCCH;

[0271] DMRS of PSSCH;

[0272] SL-PRS.

[0273] In an optional embodiment of the present application, the dedicated PSCCH resource carries second information, and the second information is used to indicate resource reservation information of the first sidelink reference signal and / or resource reservation information of the first control information.

[0274] In the embodiment of the present application, the public PSCCH resource may carry information related to the channel occupancy time COT, and the dedicated PSCCH resource may carry resource reservation information. For example, the second information may indicate that other terminals sending sidelink reference signals may share the channel resources occupied by the first terminal, or indicate that other terminals that have reserved the channel resources occupied by the first terminal in the previous order may continue to use the channel resources occupied by the first terminal to send sidelink reference signals, and so on.

[0275] Optionally, the second information includes at least one of the following:

[0276] a first indication, wherein the first indication is used to indicate that the common PSCCH resource is used for shared positioning, and / or the first indication is used to indicate a condition for shared channel occupancy time;

[0277] A resource identifier of the first sidelink reference signal occupied by the first terminal;

[0278] A source terminal identifier or a target terminal identifier associated with the first sidelink reference signal;

[0279] Resource pool information;

[0280] Advertisement type;

[0281] Terminal identifiers of other terminals that share the channel resources occupied by the first terminal;

[0282] First resource indication information reserved by the first terminal for sending the first sidelink reference signal and / or the first control information;

[0283] The first terminal is used to send second resource indication information of the first sidelink reference signal and / or the first control information, where the second resource indication information is used to instruct the first terminal to repeatedly send or continuously occupy resources;

[0284] The first terminal is used to send resource set indication information of the first sidelink reference signal and / or the first control information;

[0285] The first sidelink reference signal priority information.

[0286] It is understandable that if every time slot in the channel occupancy time needs to be sent, no further indication is required, or only 1 bit of information is used to indicate that continuous sending is required. All response resources except the indicated ones need to be sent, and no additional indication is required.

[0287] Optionally, when the sending duration of the first sidelink reference signal is less than a preset time, and / or the sending duration of the first control information is less than a preset time, the first terminal adopts a listen-before-send method of type 2 (such as 2A, 2B or 2C).

[0288] The preset time may be 584us, 1ms, and so on.

[0289] Optionally, before the first terminal sends the first sidelink reference signal and the first control information in the unlicensed frequency band, the method further includes:

[0290] The first terminal performs power detection on the transmission node corresponding to the unlicensed frequency band based on listen-before-send, and determines whether the channel corresponding to the unlicensed frequency band is empty;

[0291] The resource interval of the unlicensed frequency band is a preset interval, and the preset interval may be 25us, 16us, 0us, and so on.

[0292] Optionally, the unlicensed frequency band is a resource before or after other terminals send a sidelink reference signal; and a channel corresponding to the unlicensed frequency band belongs to a shared channel of the other terminals.

[0293] In summary, an embodiment of the present application provides a transmission method and a new PSCCH design, which sends a first sidelink reference signal and a first control information in an unlicensed frequency band, and controls the first control information to be sent in a physical sidelink control channel PSCCH resource associated with the first sidelink reference signal, so that the first control information can meet the OCB requirements.

[0294] The transmission method provided in the embodiment of the present application can be executed by a transmission device. In the embodiment of the present application, the transmission device provided in the embodiment of the present application is described by taking the transmission method executed by the transmission device as an example.

[0295] In a second aspect, an embodiment of the present application provides a transmission device. Fig. 9 , shows a structural block diagram of a transmission device provided by an embodiment of the present application, and the device can be applied to a terminal device. Fig. 9 As shown, the device may specifically include:

[0296] A sending module 801 is configured to send a first sidelink reference signal and first control information in an unlicensed frequency band;

[0297] The first control information is sent in a physical sidelink control channel PSCCH resource associated with the first sidelink reference signal; the PSCCH resource includes a dedicated PSCCH resource and / or a common PSCCH resource.

[0298] Optionally, the dedicated PSCCH resource includes at least one interleaved resource, one interleaved resource includes at least two target physical resource blocks, and an interval between adjacent target physical resource blocks is a preset frequency domain interval.

[0299] Optionally, the frequency domain position of the common PSCCH resource includes at least one of the following:

[0300] The highest frequency domain position and / or the lowest frequency domain position of the subchannels included in the resource pool;

[0301] The highest frequency domain position and / or the lowest frequency domain position of the subchannels included in the resource set of the resource pool;

[0302] The resource pool includes X1 interleaved resources, one interleaved resource includes at least two target physical resource blocks, the interval between adjacent target physical resource blocks is a preset frequency domain interval, and X1 is a positive integer.

[0303] A resource set of the resource pool includes X2 interleaved resources, and an interleaved resource includes at least two target physical resource blocks in the resource set. The interval between adjacent target physical resource blocks is a preset frequency domain interval.

[0304] Optionally, the frequency domain position of the common PSCCH resource includes the highest frequency domain position and / or the lowest frequency domain position of the resource pool corresponding to the target subchannel, and the highest frequency domain position or the lowest frequency domain position does not include a physical resource block within a cell protection band.

[0305] Optionally, the first control information includes first information, where the first information is used to indicate channel resources occupied by the first terminal; the first information includes at least one of the following:

[0306] The remaining channel occupation time of the first terminal;

[0307] a channel access priority class used by the first terminal;

[0308] an identifier of a source terminal or an identifier of a target terminal that shares the channel resources occupied by the first terminal;

[0309] Frequency domain information associated with the channel resources;

[0310] A first indication, wherein the first indication is used to indicate that a second terminal shares channel resources occupied by the first terminal to perform positioning services or send a second sidelink reference signal and a second control information, and / or, the first indication is used to indicate conditions for other terminals to share channel resources occupied by the first terminal.

[0311] Optionally, if the common PSCCH resources are distributed in at least two resource sets, the first control information is sent in at least one common PSCCH resource in each resource set.

[0312] Optionally, each resource set of the common PSCCH resources contains the same information.

[0313] Optionally, the location of the common PSCCH resource is determined according to the number of physical resource blocks or the number of sub-channels included in the resource set of each shared resource pool.

[0314] Optionally, the frequency domain position of the dedicated PSCCH resource is different from the frequency domain position of the common PSCCH resource.

[0315] Optionally, the frequency domain resources of the dedicated PSCCH resources are sub-channel resources determined after excluding the frequency domain resources of the common PSCCH resources.

[0316] Optionally, the transmit power of the PSCCH resource satisfies at least one of the following:

[0317] The transmit power of the dedicated PSCCH resource is equal to the transmit power of the first sidelink reference signal;

[0318] The transmit power of the common PSCCH resource is equal to the transmit power of the first sidelink reference signal;

[0319] The sum of the transmit power of the dedicated PSCCH resources and the transmit power of the common PSCCH resources is equal to the transmit power of the first sidelink reference signal.

[0320] Optionally, the transmit power spectral density of the PSCCH resource is related to the transmit power spectral density of the first sidelink reference signal.

[0321] Optionally, the transmission power of the PSCCH resource on the resource element used to transmit the PSCCH is the same as the transmission power of the first sidelink reference signal on the resource element used to transmit the first sidelink reference signal.

[0322] Optionally, the PSCCH resource includes the dedicated PSCCH resource or the common PSCCH resource; and a transmit power spectrum density of the PSCCH resource satisfies at least one of the following:

[0323] The transmit power spectral density of the first sidelink reference signal is N times the transmit power spectral density of the PSCCH resource,

[0324] The transmit power spectral density of the first sidelink reference signal is the same as the transmit power spectral density of the PSCCH resource;

[0325] The value of N includes any of the following:

[0326] The value of N is equal to the comb size of the first sidelink reference signal;

[0327] The value of N is related to a preset frequency domain interval between adjacent shared resources or a comb size of the first sidelink reference signal.

[0328] Optionally, the transmit power of the common PSCCH resource satisfies at least one of the following:

[0329] The transmit power of the common PSCCH resource is determined according to the bandwidth occupied by the common PSCCH resource;

[0330] The transmission power of the common PSCCH resource is less than or equal to a first preset value.

[0331] Optionally, the transmit power of the dedicated PSCCH resource includes at least one of the following:

[0332] P CMAX , P MAX,CBR With P PSCCH，SL (i) The minimum power in

[0333] P CMAX With P PSCCH，SL (i) The minimum power in

[0334] P CMAX With P PSCCH,DL (i) The minimum power in

[0335] Among them, PCMAX is the maximum transmission power of the first terminal; P MAX,CBR is the maximum transmission power of the first terminal in consideration of the channel congestion rate; PSCCH，SL (i) is the transmit power of the dedicated PSCCH resource at time i taking into account the side link loss; P PSCCH,DL (i) is the transmit power of the dedicated PSCCH resource at time i taking into account downlink loss.

[0336] Optionally, the device further comprises:

[0337] a first calculation module, configured to calculate the transmit power of the common PSCCH resource according to the transmit power of the dedicated PSCCH resource, or

[0338] The second calculation module is used to calculate the transmission power of the common PSCCH resources according to the total transmission power of the PSCCH resources.

[0339] Optionally, the first calculation module includes:

[0340] A first calculation submodule is configured to determine the transmit power of the common PSCCH resource according to the transmit power of the dedicated PSCCH resource, the frequency domain size of the common PSCCH resource and the frequency domain size of the dedicated PSCCH resource; or,

[0341] The second calculation submodule is used to determine the transmission power spectrum density of the common PSCCH resources according to the transmission power spectrum density of the dedicated PSCCH resources.

[0342] Optionally, the transmit power of the common PSCCH resource includes at least one of the following:

[0343] P CMAX , P MAX,CBR With P COMMON，SL (i) The minimum power in

[0344] P CMAX With P COMMON，SL (i) The minimum power in

[0345] P CMAX With P COMMON,DL (i) The minimum power in

[0346] Among them, P CMAX is the maximum transmission power of the first terminal; P MAX,CBR is the maximum transmission power of the first terminal in consideration of the channel congestion rate; COMMON，SL(i) is the transmit power of the common PSCCH resource at time i taking into account the side link loss; P COMMON,DL (i) is the transmission power of the common PSCCH resource at time i when downlink loss is taken into account.

[0347] Optionally, the PSCCH resources include dedicated PSCCH resources and common PSCCH resources; and the transmit power of the PSCCH resources includes at least one of the following:

[0348] P CMAX , P MAX,CBR With P PSCCH+COMMON，SL (i) The minimum power in

[0349] P CMAX With P PSCCJ+COMMON，SL (i) The minimum power in

[0350] P CMAX With P PSCCH+COMMON,DL (i) The minimum power in

[0351] Among them, P CMAX is the maximum transmission power of the first terminal; P MAX,CBR is the maximum transmission power of the first terminal in consideration of the channel congestion rate; PSCCH+COMMON，SL (i) is the transmit power of the PSCCH resource at time i, taking into account the side link loss; P PSCCH+COMMON,DL (i) is the transmission power of the PSCCH resource at time i when downlink loss is taken into account.

[0352] Optionally, the dedicated PSCCH resource carries second information, and the second information is used to indicate resource reservation information of the first sidelink reference signal and / or resource reservation information of the first control information.

[0353] Optionally, the second information includes at least one of the following:

[0354] a first indication, wherein the first indication is used to indicate that the common PSCCH resource is used for shared positioning, and / or the first indication is used to indicate a condition for shared channel occupancy time;

[0355] A resource identifier of the first sidelink reference signal occupied by the first terminal;

[0356] A source terminal identifier or a target terminal identifier associated with the first sidelink reference signal;

[0357] Resource pool information;

[0358] Advertisement type;

[0359] Terminal identifiers of other terminals that share the channel resources occupied by the first terminal;

[0360] First resource indication information reserved by the first terminal for sending the first sidelink reference signal and / or the first control information;

[0361] The first terminal is used to send second resource indication information of the first sidelink reference signal and / or the first control information, where the second resource indication information is used to instruct the first terminal to repeatedly send or continuously occupy resources;

[0362] The first terminal is used to send resource set indication information of the first sidelink reference signal and / or the first control information;

[0363] The first sidelink reference signal priority information.

[0364] Optionally, when the sending duration of the first sidelink reference signal is less than a preset time, and / or the sending duration of the first control information is less than a preset time, the first terminal adopts a type 2 listen-before-send method.

[0365] Optionally, the device further comprises:

[0366] A detection module, configured to perform power detection on a transmission node corresponding to the unlicensed frequency band based on a listen-before-send basis, and determine whether a channel corresponding to the unlicensed frequency band is empty;

[0367] The resource interval of the unlicensed frequency band is a preset interval.

[0368] Optionally, the unlicensed frequency band is a resource before or after other terminals send a sidelink reference signal; and a channel corresponding to the unlicensed frequency band belongs to a shared channel of the other terminals.

[0369] The transmission device in the embodiment of the present application can 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 can be a terminal device. Exemplarily, the terminal device can include but is not limited to the types of terminal devices 11 listed above.

[0370] The transmission device provided in the embodiment of the present application can achieve Figure 3 The various processes implemented by the method embodiment and achieving the same technical effect are not described here to avoid repetition.

[0371] Optional, such as Fig.10As shown, the embodiment of the present application further provides a communication device 900, including a processor 901 and a memory 902, and the memory 902 stores a program or instruction that can be run on the processor 901. When the communication device 900 is a terminal device, the program or instruction is executed by the processor 901 to implement each step of the transmission method embodiment described in the first aspect above, and can achieve the same technical effect, so it will not be repeated here to avoid repetition.

[0372] like Fig.11 , which is a schematic diagram of the hardware structure of a terminal device implementing an embodiment of the present application.

[0373] The terminal device 1000 includes but is not limited to: a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009 and at least some of the components of the processor 1010.

[0374] Those skilled in the art will appreciate that the terminal device 1000 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 1010 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.11 The terminal device structure shown in the figure does not constitute a limitation on the terminal device. The terminal device 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.

[0375] It should be understood that in the embodiment of the present application, the input unit 1004 may include a graphics processing unit (GPU) 10041 and a microphone 10042, and the graphics processor 10041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 1006 may include a display panel 10061, and the display panel 10061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1007 includes a touch panel 10071 and at least one of other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include two parts: a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0376] In the embodiment of the present application, after receiving downlink data from the network side device, the RF unit 1001 can transmit the data to the processor 1010 for processing; in addition, the RF unit 1001 can send uplink data to the network side device. Generally, the RF unit 1001 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0377] The memory 1009 can be used to store software programs or instructions and various data. The memory 1009 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 1009 may include a volatile memory or a non-volatile memory, or the memory 1009 may include both volatile and non-volatile memories. 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 1009 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0378] The processor 1010 may include one or more processing units; optionally, the processor 1010 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 1010.

[0379] The radio frequency unit 1001 is used to send a first sidelink reference signal and first control information in an unlicensed frequency band;

[0380] The first control information is sent in a physical sidelink control channel PSCCH resource associated with the first sidelink reference signal; the PSCCH resource includes a dedicated PSCCH resource and / or a common PSCCH resource.

[0381] Optionally, the dedicated PSCCH resource includes at least one interleaved resource, one interleaved resource includes at least two target physical resource blocks, and an interval between adjacent target physical resource blocks is a preset frequency domain interval.

[0382] Optionally, the frequency domain position of the common PSCCH resource includes at least one of the following:

[0383] The highest frequency domain position and / or the lowest frequency domain position of the subchannels included in the resource pool;

[0384] The highest frequency domain position and / or the lowest frequency domain position of the subchannels included in the resource set of the resource pool;

[0385] The resource pool includes X1 interleaved resources, one interleaved resource includes at least two target physical resource blocks, the interval between adjacent target physical resource blocks is a preset frequency domain interval, and X1 is a positive integer.

[0386] A resource set of the resource pool includes X2 interleaved resources, and an interleaved resource includes at least two target physical resource blocks in the resource set. The interval between adjacent target physical resource blocks is a preset frequency domain interval.

[0387] Optionally, the frequency domain position of the common PSCCH resource includes the highest frequency domain position and / or the lowest frequency domain position of the resource pool corresponding to the target subchannel, and the highest frequency domain position or the lowest frequency domain position does not include a physical resource block within a cell protection band.

[0388] Optionally, the first control information includes first information, where the first information is used to indicate channel resources occupied by the first terminal; the first information includes at least one of the following:

[0389] The remaining channel occupation time of the first terminal;

[0390] a channel access priority class used by the first terminal;

[0391] an identifier of a source terminal or an identifier of a target terminal that shares the channel resources occupied by the first terminal;

[0392] Frequency domain information associated with the channel resources;

[0393] A first indication, wherein the first indication is used to indicate that a second terminal shares channel resources occupied by the first terminal to perform positioning services or send a second sidelink reference signal and a second control information, and / or, the first indication is used to indicate conditions for other terminals to share channel resources occupied by the first terminal.

[0394] Optionally, if the common PSCCH resources are distributed in at least two resource sets, the first control information is sent in at least one common PSCCH resource in each resource set.

[0395] Optionally, each resource set of the common PSCCH resources contains the same information.

[0396] Optionally, the location of the common PSCCH resource is determined according to the number of physical resource blocks or the number of sub-channels included in the resource set of each shared resource pool.

[0397] Optionally, the frequency domain position of the dedicated PSCCH resource is different from the frequency domain position of the common PSCCH resource.

[0398] Optionally, the frequency domain resources of the dedicated PSCCH resources are sub-channel resources determined after excluding the frequency domain resources of the common PSCCH resources.

[0399] Optionally, the transmit power of the PSCCH resource satisfies at least one of the following:

[0400] The transmit power of the dedicated PSCCH resource is equal to the transmit power of the first sidelink reference signal;

[0401] The transmit power of the common PSCCH resource is equal to the transmit power of the first sidelink reference signal;

[0402] The sum of the transmit power of the dedicated PSCCH resources and the transmit power of the common PSCCH resources is equal to the transmit power of the first sidelink reference signal.

[0403] Optionally, the transmit power spectral density of the PSCCH resource is related to the transmit power spectral density of the first sidelink reference signal.

[0404] Optionally, the transmission power of the PSCCH resource on the resource element used to transmit the PSCCH is the same as the transmission power of the first sidelink reference signal on the resource element used to transmit the first sidelink reference signal.

[0405] Optionally, the PSCCH resource includes the dedicated PSCCH resource or the common PSCCH resource; and a transmit power spectrum density of the PSCCH resource satisfies at least one of the following:

[0406] The transmit power spectral density of the first sidelink reference signal is N times the transmit power spectral density of the PSCCH resource,

[0407] The transmit power spectral density of the first sidelink reference signal is the same as the transmit power spectral density of the PSCCH resource;

[0408] The value of N includes any of the following:

[0409] The value of N is equal to the comb size of the first sidelink reference signal;

[0410] The value of N is related to a preset frequency domain interval between adjacent shared resources or a comb size of the first sidelink reference signal.

[0411] Optionally, the transmit power of the common PSCCH resource satisfies at least one of the following:

[0412] The transmit power of the common PSCCH resource is determined according to the bandwidth occupied by the common PSCCH resource;

[0413] The transmission power of the common PSCCH resource is less than or equal to a first preset value.

[0414] Optionally, the transmit power of the dedicated PSCCH resource includes at least one of the following:

[0415] P CMAX , P MAX,CBR With P PSCCH，SL (i) The minimum power in

[0416] P CMAX With P PSCCH，SL (i) The minimum power in

[0417] P CMAX With P PSCCH,DL (i) The minimum power in

[0418] Among them, P CMAX is the maximum transmission power of the first terminal; P MAX,CBR is the maximum transmission power of the first terminal in consideration of the channel congestion rate; PSCCH，SL (i) is the transmit power of the dedicated PSCCH resource at time i taking into account the side link loss; P PSCCH,DL (i) is the transmit power of the dedicated PSCCH resource at time i taking into account downlink loss.

[0419] Optionally, the processor 1010 is configured to calculate the transmit power of the common PSCCH resources according to the transmit power of the dedicated PSCCH resources, or calculate the transmit power of the common PSCCH resources according to the total transmit power of the PSCCH resources.

[0420] Optionally, the processor 1010 is specifically used to determine the transmit power of the common PSCCH resources based on the transmit power of the dedicated PSCCH resources, the frequency domain size of the common PSCCH resources and the frequency domain size of the dedicated PSCCH resources; or, determine the transmit power spectral density of the common PSCCH resources based on the transmit power spectral density of the dedicated PSCCH resources.

[0421] Optionally, the transmit power of the common PSCCH resource includes at least one of the following:

[0422] P CMAX , P MAX,CBR With P COMMON，SL (i) The minimum power in

[0423] P CMAX With P COMMON，SL (i) The minimum power in

[0424] P CMAX With P COMMON,DL (i) The minimum power in

[0425] Among them, P CMAX is the maximum transmission power of the first terminal; P MAX,CBR is the maximum transmission power of the first terminal in consideration of the channel congestion rate; COMMON，SL (i) is the transmit power of the common PSCCH resource at time i taking into account the side link loss; P COMMON,DL (i) is the transmission power of the common PSCCH resource at time i when downlink loss is taken into account.

[0426] Optionally, the PSCCH resources include dedicated PSCCH resources and common PSCCH resources; and the transmit power of the PSCCH resources includes at least one of the following:

[0427] P CMAX , P MAX,CBR With P PSCCH+COMMON，SL (i) The minimum power in

[0428] P CMAX With P PSCCJ+COMMON，SL (i) The minimum power in

[0429] P CMAX With PPSCCH+COMMON,DL (i) The minimum power in

[0430] Among them, P CMAX is the maximum transmission power of the first terminal; P MAX,CBR is the maximum transmission power of the first terminal in consideration of the channel congestion rate; PSCCH+COMMON，SL (i) is the transmit power of the PSCCH resource at time i, taking into account the side link loss; P PSCCH+COMMON,DL (i) is the transmission power of the PSCCH resource at time i when downlink loss is taken into account.

[0431] Optionally, the dedicated PSCCH resource carries second information, and the second information is used to indicate resource reservation information of the first sidelink reference signal and / or resource reservation information of the first control information.

[0432] Optionally, the second information includes at least one of the following:

[0433] a first indication, wherein the first indication is used to indicate that the common PSCCH resource is used for shared positioning, and / or the first indication is used to indicate a condition for shared channel occupancy time;

[0434] A resource identifier of the first sidelink reference signal occupied by the first terminal;

[0435] A source terminal identifier or a target terminal identifier associated with the first sidelink reference signal;

[0436] Resource pool information;

[0437] Advertisement type;

[0438] Terminal identifiers of other terminals that share the channel resources occupied by the first terminal;

[0439] First resource indication information reserved by the first terminal for sending the first sidelink reference signal and / or the first control information;

[0440] The first terminal is used to send second resource indication information of the first sidelink reference signal and / or the first control information, where the second resource indication information is used to instruct the first terminal to repeatedly send or continuously occupy resources;

[0441] The first terminal is used to send resource set indication information of the first sidelink reference signal and / or the first control information;

[0442] The first sidelink reference signal priority information.

[0443] Optionally, when the sending duration of the first sidelink reference signal is less than a preset time, and / or the sending duration of the first control information is less than a preset time, the first terminal adopts a type 2 listen-before-send method.

[0444] Optionally, the processor 1010 is further used to perform power detection on the transmission node corresponding to the unlicensed frequency band based on listen before send, and determine whether the channel corresponding to the unlicensed frequency band is empty; wherein the resource interval of the unlicensed frequency band is a preset interval.

[0445] Optionally, the unlicensed frequency band is a resource before or after other terminals send a sidelink reference signal; and a channel corresponding to the unlicensed frequency band belongs to a shared channel of the other terminals.

[0446] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned transmission method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0447] The processor is the processor in the terminal device 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.

[0448] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0449] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0450] The embodiments of the present application further provide a computer program / program product, which is stored in a storage medium and is executed by at least one processor to implement the various processes of the above-mentioned transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0451] An embodiment of the present application also provides a transmission system, including: a terminal device and a network side device, wherein the terminal can be used to execute the steps of the transmission method described in the second aspect above, and the network side device can be used to execute the steps of the transmission method described in the first aspect above.

[0452] 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 the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do 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 methods and devices in the embodiments 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.

[0453] 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 software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0454] 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 without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A transmission method, characterized in that: include: The first terminal sends a first sidelink reference signal and first control information in an unlicensed frequency band; The first control information is sent in a physical sidelink control channel PSCCH resource associated with the first sidelink reference signal; the PSCCH resource includes a dedicated PSCCH resource and / or a common PSCCH resource.

2. The method according to claim 1, characterized in that The dedicated PSCCH resource includes at least one interleaved resource, one interleaved resource includes at least two target physical resource blocks, and the interval between adjacent target physical resource blocks is a preset frequency domain interval.

3. The method according to claim 1, characterized in that: The frequency domain position of the common PSCCH resource includes at least one of the following: The highest frequency domain position and / or the lowest frequency domain position of the subchannels included in the resource pool; The highest frequency domain position and / or the lowest frequency domain position of the subchannels included in the resource set of the resource pool; The resource pool includes X1 interleaved resources, one interleaved resource includes at least two target physical resource blocks, the interval between adjacent target physical resource blocks is a preset frequency domain interval, and X1 is a positive integer. A resource set of the resource pool includes X2 interleaved resources, and an interleaved resource includes at least two target physical resource blocks in the resource set. The interval between adjacent target physical resource blocks is a preset frequency domain interval.

4. The method according to claim 3, characterized in that The frequency domain position of the common PSCCH resource includes the highest frequency domain position and / or the lowest frequency domain position of the resource pool corresponding to the target subchannel, and the highest frequency domain position or the lowest frequency domain position does not include the physical resource block in the cell protection band.

5. The method according to claim 1, characterized in that The first control information includes first information, where the first information is used to indicate channel resources occupied by the first terminal; the first information includes at least one of the following: The remaining channel occupation time of the first terminal; a channel access priority class used by the first terminal; a source terminal identifier or a target terminal identifier that shares the channel resources occupied by the first terminal; Frequency domain information associated with the channel resources; A first indication, wherein the first indication is used to indicate that a second terminal shares channel resources occupied by the first terminal to perform positioning services or send a second sidelink reference signal and a second control information, and / or, the first indication is used to indicate conditions for other terminals to share channel resources occupied by the first terminal.

6. The method according to claim 5, characterized in that If the common PSCCH resources are distributed in at least two resource sets, the first control information is sent in at least one common PSCCH resource in each resource set.

7. The method according to claim 6, characterized in that Each resource set of the common PSCCH resources contains the same information.

8. The method according to claim 1, characterized in that The location of the common PSCCH resource is determined according to the number of physical resource blocks or sub-channels included in the resource set of each shared resource pool.

9. The method according to any one of claims 1 to 8, characterized in that: The frequency domain position of the dedicated PSCCH resource is different from the frequency domain position of the common PSCCH resource.

10. The method according to claim 9, characterized in that The frequency domain resources of the dedicated PSCCH resources are sub-channel resources determined after excluding the frequency domain resources of the common PSCCH resources.

11. The method according to claim 1, characterized in that: The transmit power of the PSCCH resource satisfies at least one of the following: The transmit power of the dedicated PSCCH resource is equal to the transmit power of the first sidelink reference signal; The transmit power of the common PSCCH resource is equal to the transmit power of the first sidelink reference signal; The sum of the transmit power of the dedicated PSCCH resources and the transmit power of the common PSCCH resources is equal to the transmit power of the first sidelink reference signal.

12. The method according to claim 1 or 11, characterized in that: The transmit power spectral density of the PSCCH resource is related to the transmit power spectral density of the first sidelink reference signal.

13. The method according to claim 1 or 11, characterized in that: The transmission power of the PSCCH resource on the resource elements used to transmit the PSCCH is the same as the transmission power of the first sidelink reference signal on the resource elements used to transmit the first sidelink reference signal.

14. The method according to claim 12, characterized in that The PSCCH resource includes the dedicated PSCCH resource or the common PSCCH resource; the transmit power spectrum density of the PSCCH resource satisfies at least one of the following: The transmit power spectral density of the first sidelink reference signal is N times the transmit power spectral density of the PSCCH resource, The transmit power spectral density of the first sidelink reference signal is the same as the transmit power spectral density of the PSCCH resource; The value of N includes any of the following: The value of N is equal to the comb size of the first sidelink reference signal; The value of N is related to a preset frequency domain interval between adjacent shared resources or a comb size of the first sidelink reference signal.

15. The method according to claim 1, characterized in that The transmission power of the common PSCCH resource satisfies at least one of the following: The transmit power of the common PSCCH resource is determined according to the bandwidth occupied by the common PSCCH resource; The transmission power of the common PSCCH resource is less than or equal to a first preset value.

16. The method according to claim 1, characterized in that The transmit power of the dedicated PSCCH resource includes at least one of the following: P CMAX , P MAX,CBR With P PScCH，SL (i) The minimum power in P CMAX With P PSCCH，SL (i) The minimum power in P CMAX With P PSCCH,DL (i) The minimum power in Among them, P CMAX is the maximum transmission power of the first terminal; P MAX,CBR is the maximum transmission power of the first terminal in consideration of the channel congestion rate; PSCCH，SL (i) is the transmit power of the dedicated PSCCH resource at time i taking into account the side link loss; P PSCCH,DL (i) is the transmit power of the dedicated PSCCH resource at time i taking into account downlink loss.

17. The method according to any one of claims 11 to 16, characterized in that: The method further comprises: The first terminal calculates the transmit power of the common PSCCH resource according to the transmit power of the dedicated PSCCH resource, or The first terminal calculates the transmission power of the common PSCCH resources according to the total transmission power of the PSCCH resources.

18. The method according to any one of claim 17, characterized in that: The first terminal calculates the transmit power of the common PSCCH resource according to the transmit power of the dedicated PSCCH resource, including: The first terminal determines the transmit power of the common PSCCH resource according to the transmit power of the dedicated PSCCH resource, the frequency domain size of the common PSCCH resource and the frequency domain size of the dedicated PSCCH resource; or, The first terminal determines the transmit power spectral density of the common PSCCH resources according to the transmit power spectral density of the dedicated PSCCH resources.

19. The method according to claim 1, characterized in that The transmission power of the common PSCCH resource includes at least one of the following: P CMAX , P MAX,CBR With P COMMON，SL (i) The minimum power in P CMAX With P COMMON，SL (i) The minimum power in P CMAX With P COMMON,DL (i) The minimum power in Among them, P CMAX is the maximum transmission power of the first terminal; P MAX,CBR is the maximum transmission power of the first terminal in consideration of the channel congestion rate; COMMON，SL (i) is the transmit power of the common PSCCH resource at time i taking into account the side link loss; P COMMON,DL (i) is the transmission power of the common PSCCH resource at time i when downlink loss is taken into account.

20. The method according to claim 1, characterized in that The PSCCH resources include dedicated PSCCH resources and common PSCCH resources; the transmit power of the PSCCH resources includes at least one of the following: P CMAX , P MAX,CBR With P PSCCH+COMMON，sL (i) The minimum power in P CMAX With P PsCCH+COMMON，SL (i) The minimum power in P CMAX With P PSCCH+COMMON,DL (i) The minimum power in Among them, P CMAX is the maximum transmission power of the first terminal; P MAX,CBR is the maximum transmission power of the first terminal in consideration of the channel congestion rate; PSCCH+COMMON，SL (i) is the transmit power of the PSCCH resource at time i, taking into account the side link loss; P PSCCH+COMMON,DL (i) is the transmission power of the PSCCH resource at time i when downlink loss is taken into account.

21. The method according to claim 1, characterized in that The dedicated PSCCH resource carries second information, where the second information is used to indicate resource reservation information of the first sidelink reference signal and / or resource reservation information of the first control information.

22. The method according to claim 21, characterized in that The second information includes at least one of the following: a first indication, wherein the first indication is used to indicate that the common PSCCH resource is used for shared positioning, and / or the first indication is used to indicate a condition for shared channel occupancy time; A resource identifier of the first sidelink reference signal occupied by the first terminal; A source terminal identifier or a target terminal identifier associated with the first sidelink reference signal; Resource pool information; Advertisement type; Terminal identifiers of other terminals that share the channel resources occupied by the first terminal; First resource indication information reserved by the first terminal for sending the first sidelink reference signal and / or the first control information; The first terminal is used to send second resource indication information of the first sidelink reference signal and / or the first control information, where the second resource indication information is used to instruct the first terminal to repeatedly send or continuously occupy resources; The first terminal is used to send resource set indication information of the first sidelink reference signal and / or the first control information; The first sidelink reference signal priority information.

23. The method according to any one of claims 1 to 22, characterized in that When the sending duration of the first sidelink reference signal is less than the preset time, and / or the sending duration of the first control information is less than the preset time, the first terminal adopts the type 2 listen-before-send method.

24. The method according to claim 1, characterized in that Before the first terminal sends the first sidelink reference signal and the first control information in the unlicensed frequency band, the method further includes: The first terminal performs power detection on the transmission node corresponding to the unlicensed frequency band based on listen-before-send, and determines whether the channel corresponding to the unlicensed frequency band is empty; The resource interval of the unlicensed frequency band is a preset interval.

25. The method according to claim 1, characterized in that The unlicensed frequency band is a resource before or after other terminals send a sidelink reference signal; and a channel corresponding to the unlicensed frequency band belongs to a shared channel of the other terminals.

26. A transmission device, characterized in that: include: A sending module, used to send a first sidelink reference signal and first control information in an unlicensed frequency band; The first control information is sent in a physical sidelink control channel PSCCH resource associated with the first sidelink reference signal; the PSCCH resource includes a dedicated PSCCH resource and / or a common PSCCH resource.

27. A terminal device, characterized in that: It includes a processor and a memory, the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the transmission method according to any one of claims 1 to 25 are implemented.

28. A readable storage medium, characterized in that: The readable storage medium stores programs or instructions, and when the programs or instructions are executed by the processor, the transmission method according to any one of claims 1 to 25 is implemented.

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