Physical sidelink channel transmission method and device, computer program, and electronic device

Abstract

The embodiments of the present disclosure propose a method and apparatus, a storage medium and an electronic device for transmitting a physical sidelink channel, which includes: receiving a radio resource control (RRC) message from a communication device, the RRC message including information of a frequency-domain resource location of a target physical sidelink channel, the information of the frequency-domain resource location of the target physical sidelink channel being used to set a frequency-domain location of the target physical sidelink channel; determining a frequency-domain location of the target physical sidelink channel, the target physical sidelink channel being used to occupy a time-domain resource or a time-frequency resource of a communication channel; performing resource mapping such that the target physical channel after resource mapping occupies some resource elements in L (L is 2 or more) orthogonal frequency division multiplexing OFDM symbols in one slot, copying the resource elements mapped to the target channel on the second OFDM symbol to an OFDM symbol immediately before the second OFDM symbol; and transmitting the target physical sidelink channel on the L OFDM symbols in one slot.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This disclosure claims priority to a Chinese patent application filed with the China Patent Office on March 18, 2022, bearing application number 202210271405.3 and entitled "Physical sidelink channel transmission method and apparatus, storage medium and electronic device," the entire contents of which are incorporated herein by reference.

[0002] (Technical field) The present disclosure relates to the field of communications, and in particular to a method and apparatus for transmitting a physical sidelink channel, a storage medium, and an electronic device. [Background technology]

[0003] In a sidelink communication system, when a service needs to be transmitted between user equipments (UEs), the service between UEs is transmitted directly from the data source UE to the target UE via the sidelink without going through the network, i.e., without being transferred via a cellular link between the UE and the base station. This direct communication mode between UEs has characteristics that clearly distinguish it from the communication mode of conventional cellular systems. Typical applications of sidelink communication are device-to-device (D2D) communication and vehicle-to-everything (Vehicle to Everything) communication. (V2X) communications. Here, V2X communications include vehicle-to-vehicle (V2V) communications, vehicle-to-pedestrian (V2P) communications, and vehicle-to-infrastructure (V2I) communications. For short-range communication users where sidelink communications are applicable, sidelink communications not only save wireless spectrum resources, but also relieve data transmission pressure on the core network, reduce system resource occupation, improve the spectral efficiency of cellular communication systems, reduce communication latency, and significantly reduce network operation costs.

[0004] On the other hand, the current sidelink design only considers the ITS (Intelligent Transport System) spectrum and licensed spectrum allocated to network operators, and does not consider unlicensed spectrum. In the existing sidelink, one slot can contain several sidelink channels, and the sidelink channels in one slot are divided into a sidelink control channel (PSCCH), a sidelink control channel (PSCCH), a sidelink control channel (PSCCH), a sidelink control channel (S ... A slot includes a physical sidelink shared channel (PSSCH) and a physical sidelink feedback channel (PSFCH). One slot also includes an OFDM symbol in which no sidelink channel is transmitted throughout the entire symbol.

[0005] In unlicensed spectrum, only channels that have successfully passed LBT (Listen Before Talk) can transmit. LBT means that communication nodes need to compete for resources, and only after successfully competing for time-frequency resources can the communication nodes transmit information on the time-frequency resources. More specifically, in the LBT mechanism, the communication nodes perform a channel access process (monitor whether the channel is idle) before transmitting information, and only after monitoring that the channel is idle can the communication nodes transmit information.

[0006] The related sidelink designs described above are designs by 3GPP (registered trademark) targeting ITS spectrum and licensed spectrum, but currently 3GPP does not yet have a sidelink design targeting unlicensed spectrum.

[0007] Furthermore, applying the above-mentioned design for ITS spectrum and licensed spectrum to unlicensed spectrum results in a high probability of LBT failure. One of the reasons for the high probability of "listen before talk" failure is that existing sidelink designs include OFDM symbols in which the sidelink channel is not transmitted throughout the entire symbol. If the sidelink channel is not transmitted throughout the entire OFDM symbol, the resources contended for by the terminal may be preempted by other communication nodes during the channel occupancy time. Furthermore, in existing sidelink designs, the presence of the PSFCH symbol causes discontinuous transmission of the sidelink channel transmitted by the terminal. This discontinuous transmission of the sidelink channel is particularly serious when the terminal needs to transmit the sidelink channel on the slot following the PSFCH symbol. Discontinuous transmission of the sidelink channel may result in preemption of the time-frequency resources during the channel occupancy time by other communication nodes.

[0008] In the related art, no effective solution has been proposed so far for the problem of channel preemption due to discontinuous transmission of the sidelink channel. Summary of the Invention [Problem to be solved by the invention]

[0009] The embodiments of the present disclosure provide a method and apparatus for transmitting a physical sidelink channel, a storage medium, and an electronic device to solve at least the problem of channel preemption due to discontinuous transmission of the sidelink channel. [Means for solving the problem]

[0010] According to an aspect of the present disclosure, the present disclosure provides a method for determining a frequency-domain location of a target physical sidelink channel (SCH) using a radio resource control (RRC) message from a communication device, the RRC message including information on frequency-domain resource location of a target physical sidelink channel, the information on frequency-domain resource location of the target physical sidelink channel being used to configure the frequency-domain location of the target physical sidelink channel; determining a frequency-domain location of the target physical sidelink channel, the target physical sidelink channel being used to occupy time-domain or time-frequency resources of a communication channel; and performing resource mapping to determine a frequency-domain location of the target physical sidelink channel (SCH) after resource mapping. Target Physical Sidelink Channel occupy some resource elements in L (where L is 2 or more) orthogonal frequency division multiplexing OFDM symbols in one slot, copying resource elements mapped to the target channel on a second OFDM symbol to an OFDM symbol immediately preceding the second OFDM symbol; and transmitting the target physical sidelink channel on the L OFDM symbols in the one slot.

[0011] According to another aspect of the present disclosure, there is provided a receiving module configured to receive a radio resource control (RRC) message from a communication device, the RRC message including information on frequency-domain resource locations of a target physical sidelink channel, the information on frequency-domain resource locations of the target physical sidelink channel being used to set the frequency-domain location of the target physical sidelink channel; a determining module configured to determine the frequency-domain location of the target physical sidelink channel, the target physical sidelink channel being configured to occupy time-domain or time-frequency resources of a communication channel; and a determining module configured to perform resource mapping and determine the frequency-domain location of the target physical sidelink channel after resource mapping. Target Physical Sidelink Channel a mapping module configured to copy resource elements mapped to a target channel on a second OFDM symbol to an OFDM symbol immediately preceding the second OFDM symbol, such that the target channel occupies some resource elements in L (where L is 2 or more) orthogonal frequency division multiplexing OFDM symbols in one slot; and a transmitting module configured to transmit the target physical sidelink channel on the L OFDM symbols in the one slot.

[0012] According to yet another aspect of an embodiment of the present disclosure, there is further provided a computer-readable storage medium having stored thereon a computer program, the computer program being configured, when executed, to perform the method for transmitting a physical sidelink channel.

[0013] According to yet another aspect of an embodiment of the present disclosure, there is further provided an electronic device comprising: a memory; a processor; and a computer program stored in the memory and executable on the processor, the computer program causing the processor to execute the method for transmitting a physical sidelink channel. [Effects of the Invention]

[0014] According to the present disclosure, a radio resource control (RRC) message is received from a communication device, the RRC message including information on frequency-domain resource locations of a target physical sidelink channel, the information on frequency-domain resource locations of the target physical sidelink channel being used to configure the frequency-domain location of the target physical sidelink channel, and a frequency-domain location of the target physical sidelink channel is determined, the target physical sidelink channel is used to occupy time-domain or time-frequency resources of a communication channel, and resource mapping is performed to obtain the frequency-domain resource locations of the target physical sidelink channel after resource mapping. Target Physical Sidelink Channel occupies some resource elements in L (where L is 2 or more) orthogonal frequency division multiplexing OFDM symbols in one slot, copies the resource elements mapped to the target channel on the second OFDM symbol to the OFDM symbol immediately preceding the second OFDM symbol, and transmits the target physical sidelink channel on the L OFDM symbols in the one slot, thereby solving the problem of channel preemption caused by discontinuous transmission of the sidelink channel.

[0015] The drawings described herein are intended to facilitate a better understanding of the present disclosure and constitute a part of the present disclosure. The exemplary embodiments and the description thereof are intended to explain the present disclosure and are not intended to unduly limit the present disclosure. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 10 is a hardware configuration block diagram of a computer terminal for a method of transmitting a physical sidelink channel according to an embodiment of the present disclosure. [Figure 2] 1 is a flowchart of a method for transmitting a physical sidelink channel according to an embodiment of the present disclosure. [Figure 3]1 is a flowchart of a method for transmitting a physical sidelink channel applied to a first communication device according to an embodiment of the present disclosure. [Figure 4] 10 is a flowchart of a method for transmitting a physical sidelink channel applied to a second communication device according to an embodiment of the present disclosure. [Figure 5] 1 is a schematic diagram (part 1) of an OFDM symbol including a target channel according to an embodiment of the present disclosure. [Figure 6] FIG. 2 is a schematic diagram (part 2) of an OFDM symbol including a target channel according to an embodiment of the present disclosure. [Figure 7] FIG. 2 is a schematic diagram of a target slot set according to an embodiment of the present disclosure. [Figure 8] 1 is a schematic diagram (part 1) of target frequency domain resource locations according to an embodiment of the present disclosure; [Figure 9] FIG. 2 is a schematic diagram (part 2) of target frequency domain resource locations according to an embodiment of the present disclosure. [Figure 10] 1 is a schematic diagram (part 1) of OFDM symbols usable for a target channel according to an embodiment of the present disclosure. [Figure 11] FIG. 2 is a schematic diagram (part 2) of OFDM symbols usable for a target channel according to an embodiment of the present disclosure. [Figure 12] FIG. 10 is a schematic diagram (part 3) of OFDM symbols usable for a target channel according to an embodiment of the present disclosure. [Figure 13] FIG. 4 is a schematic diagram (part 4) of OFDM symbols usable for a target channel according to an embodiment of the present disclosure. [Figure 14] FIG. 2 is a schematic diagram of a target slot set according to an embodiment of the present disclosure. [Figure 15] 1 is a schematic diagram of a case where there are K slots containing OFDM symbols capable of transmitting a target channel, according to an embodiment of the present disclosure. [Figure 16] 1 is a schematic diagram (part 1) of a second OFDM symbol according to an embodiment of the present disclosure. [Figure 17]1 is a schematic diagram (part 2) of a second OFDM symbol according to an embodiment of the present disclosure. [Figure 18] 1 is a schematic diagram (part 3) of a second OFDM symbol according to an embodiment of the present disclosure. [Figure 19] FIG. 4 is a schematic diagram (part 4) of a second OFDM symbol according to an embodiment of the present disclosure. [Figure 20] FIG. 5 is a schematic diagram (part 5) of a second OFDM symbol according to an embodiment of the present disclosure. [Figure 21] FIG. 6 is a schematic diagram (part 6) of a second OFDM symbol according to an embodiment of the present disclosure. [Figure 22] FIG. 1 is a block diagram illustrating the configuration of a physical sidelink channel transmitting device according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0017] In order to allow those skilled in the art to better understand the aspects of the present disclosure, the following will clearly and completely describe the technical aspects of the embodiments of the present disclosure with reference to the drawings of the embodiments of the present disclosure. It goes without saying that the described embodiments are only some embodiments of the present disclosure, and are not all of them. Other embodiments that those skilled in the art can obtain based on the embodiments of the present disclosure without requiring creative work should also fall within the scope of protection of the present disclosure.

[0018] Note that the terms "first," "second," and the like in the specification and claims of this disclosure and the above-described drawings are intended to distinguish between similar objects and not to describe a particular order or priority. It should be understood that the numerals used in this manner can be interchanged where appropriate to enable the embodiments of the present disclosure described herein to be performed in an order other than the order shown or described herein. Furthermore, the terms "comprise," "have," and any variations thereof are intended to cover what is included without being exclusive. For example, a process, method, system, product, or apparatus including a series of steps or units need not be limited to the explicitly shown steps or units, but may include steps or units not explicitly shown for the process, method, product, or apparatus, or other steps or units inherent therein.

[0019] To better understand the following embodiments, some technical terms in this disclosure will be explained.

[0020] UE (User Equipment), SCI (Sidelink Control Information), PSCCH (Physical Sidelink Control Channel) , PSSCH (Physical Sidelink Shared Channel), PSFCH (Physical sidelink feedback channel), Sidelink, OFDM (Orthogonal Frequency Division Multiplexing), RRC (Radio Resource Control), LBT (Listen Before Talk), slot(slot).

[0021] The method embodiments provided in the embodiments of the present disclosure may be implemented on a computer terminal or a similar computing device. As an example of implementation on a computer terminal, FIG. 1 is a hardware configuration block diagram of a computer terminal for implementing the physical sidelink channel transmission method of the embodiments of the present disclosure. As shown in FIG. 1, the computer terminal includes one or more processors 202 (only one of which is shown in FIG. 1) (the processor 202 may be a microprocessor (simply referred to as MPU) or a programmable logic device). These can include programmable logic devices (PLDs), 1 may include, but are not limited to, a processor 202 and a memory 204 configured to store data. In one exemplary embodiment, the computer terminal may further include a transmission device 206 and an input / output device 208 configured to have communication capabilities. Those skilled in the art will appreciate that the configuration shown in FIG. 1 is merely schematic and is not intended to limit the configuration of the computer terminal. For example, the computer terminal may include more or fewer components than those shown in FIG. 1, or may have a different configuration with functionality equivalent to or greater than that shown in FIG. 1.

[0022] The memory 204 may be configured to store computer programs, such as software programs and modules of application software, such as a computer program corresponding to a physical sidelink channel transmission method according to an embodiment of the present disclosure. The processor 202 executes the computer programs stored in the memory 204 to perform various functional applications and data processing, i.e., to implement the above-described methods. The memory 204 may include high-speed random access memory and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 204 may further include memory located remotely from the processor 202, which may be connected to the computer terminal via a network. Examples of such networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0023] The transmission device 206 is configured to transmit and receive data over a network. An example of the network may include a wireless network provided by a communications vendor of the computer terminal. In one example, the transmission device 206 includes a network interface controller (NIC) that is connected to other network devices via a base station and can communicate with the Internet. In one example, the transmission device 206 may be a radio frequency (RF) module configured to communicate with the Internet wirelessly.

[0024] FIG. 2 is a flowchart of a method for transmitting a physical sidelink channel according to an embodiment of the present disclosure. As shown in FIG. 2, the method includes the following steps:

[0025] In step S202, a radio resource control (RRC) message is received from the communication device, the RRC message including information on frequency domain resource locations of a target physical sidelink channel, the information on frequency domain resource locations of the target physical sidelink channel being used to configure the frequency domain location of the target physical sidelink channel.

[0026] In step S204, a frequency domain location of a target physical sidelink channel is determined, the target physical sidelink channel being configured to occupy time domain or time-frequency resources of the communication channel.

[0027] In step S206, resource mapping is performed. Target Physical Sidelink Channel occupies some resource elements in L (where L is 2 or more) orthogonal frequency division multiplexing OFDM symbols in one slot, and copies the resource elements mapped to the target channel on the second OFDM symbol to the OFDM symbol immediately preceding the second OFDM symbol.

[0028] In step S208, the target physical sidelink channel is transmitted over L OFDM symbols in the one slot.

[0029] According to the above embodiment, a radio resource control (RRC) message is received from a communication device, the RRC message including information on frequency-domain resource locations of a target physical sidelink channel, the information on frequency-domain resource locations of the target physical sidelink channel being used to configure the frequency-domain location of the target physical sidelink channel, and a frequency-domain location of the target physical sidelink channel is determined, the target physical sidelink channel is used to occupy time-domain or time-frequency resources of a communication channel, and resource mapping is performed to obtain the frequency-domain resource locations of the target physical sidelink channel after resource mapping. Target Physical Sidelink Channeloccupies some resource elements in L (where L is 2 or more) orthogonal frequency division multiplexing OFDM symbols in one slot, copies the resource elements mapped to the target channel on the second OFDM symbol to the OFDM symbol immediately preceding the second OFDM symbol, and transmits the target physical sidelink channel on the L OFDM symbols in the one slot, thereby solving the problem of channel preemption caused by discontinuous transmission of the sidelink channel.

[0030] In one exemplary embodiment, the second OFDM symbol is the penultimate symbol in a slot configured to transmit a target physical sidelink channel.

[0031] In one exemplary embodiment, the RRC message further includes a periodicity value of a physical sidelink feedback channel PSFCH, and the periodicity value of the target physical sidelink channel is determined based on the periodicity value of the PSFCH.

[0032] In one exemplary embodiment, the frequency domain location of the target physical sidelink channel and the frequency domain location of the PSFCH in the same slot do not overlap.

[0033] In one exemplary embodiment, the frequency domain of the target physical sidelink channel is discrete, and the frequency domain positions of the target physical sidelink channel correspond to M physical resource blocks PRBs that are discontinuous in frequency domain, where M is an integer greater than 5.

[0034] In one exemplary embodiment, the process of resource mapping for the target physical sidelink channel includes: generating a first sequence, which is a ZC sequence; generating a second sequence, wherein the process of generating the second sequence includes a cyclic shift operation on the first sequence; and mapping the second sequence to resource elements corresponding to one OFDM symbol of the target physical sidelink channel.

[0035] In one exemplary embodiment, in a first OFDM symbol of the L OFDM symbols in the one slot, Target Physical Sidelink Channel in the first OFDM symbol in a slot. Target Physical Sidelink Channel The condition for transmitting is that the slot belongs to a sidelink slot set and the RRC message the slot belongs to a sidelink slot set, and at least a PSSCH is transmitted in a slot immediately following the slot in the sidelink slot set; and the slot belongs to a sidelink slot set, and a physical sidelink shared channel (PSSCH) is transmitted in at least one OFDM symbol belonging to the slot that is before a first OFDM symbol in the first OFDM symbol, and at least a PSSCH is transmitted in a slot immediately following the slot in the sidelink slot set.

[0036] In one exemplary embodiment, the target physical sidelink channel is transmitted on L orthogonal frequency division multiplexing OFDM symbols in one slot, wherein a condition for transmitting the target physical sidelink channel is transmitting terminal does not transmit a PSFCH in the slot, and transmitting terminalor transmitting the target physical sidelink channel with L orthogonal frequency division multiplexing OFDM symbols in one slot, wherein the condition for not transmitting the target physical sidelink channel includes at least one of: transmitting terminal transmits a PSFCH in the slot; transmitting terminal and receiving, within the slot, a PSFCH transmitted from another terminal.

[0037] In one exemplary embodiment, a condition for transmitting the target physical sidelink channel in one slot is further proposed, which condition includes that the slot belongs to a sidelink slot set, the transmitting terminal transmits at least a PSSCH in the slot and in the slot immediately following the slot in the sidelink slot set, and there are no other slots between the slot and the slot immediately following the slot in the sidelink slot set.

[0038] In one exemplary embodiment, at least one slot of N consecutive slots (N is 2 or more) in the sidelink slot set includes an OFDM symbol for transmitting a target physical sidelink channel, Target Physical Sidelink Channel performing a channel access process before transmitting the target physical sidelink channel includes performing a first channel access process before a first slot of the N slots; and performing a second channel access process in a time period before a transmission time period in at least one slot of the N slots, where the transmission time period indicates a time period of a first OFDM symbol for transmitting the target physical sidelink channel, and the time period before the transmission time period is Y us, where Y≦25.

[0039] In one exemplary embodiment, a further technical aspect is proposed, comprising the steps of: randomly selecting one slot X from a set of sidelink slots within one time period, or randomly selecting one slot X from a subset of slots belonging to the set of sidelink slots within one time period; transmitting at least a PSSCH by the terminal in each of N consecutive slots (N being 2 or more) starting from slot X in the set of sidelink slots; and transmitting at least a target physical sidelink channel by the terminal in at least one of the N consecutive slots starting from slot X in the set of sidelink slots.

[0040] In one exemplary embodiment, a further technical aspect is proposed, which optionally includes transmitting a target physical sidelink channel in consecutive OFDM symbols in a slot, specifically transmitting the target physical sidelink channel in a first OFDM symbol in the slot, transmitting the target physical sidelink channel within a first duration t1 of a second OFDM symbol in the slot, and transmitting no PSSCH channel or no physical sidelink channel within a second duration t2 of the second OFDM symbol in the slot, wherein the first OFDM symbols are L consecutive symbols of duration t, and the second OFDM symbol is the OFDM symbol immediately preceding the first OFDM symbol in the first OFDM symbol, where t is equal to the sum of t1 and t2.

[0041] In one exemplary embodiment, the resource mapping process on the second OFDM symbol comprises any one of: copying a sidelink channel or signal having a duration of t1 in a first OFDM symbol of the first OFDM symbol to a leading time slot t1 in the second OFDM symbol; copying a sidelink channel or signal having a duration of t1 in a second OFDM symbol of the first OFDM symbol to a leading time slot t1 in the second OFDM symbol; or copying a sidelink channel or signal having a duration of t1 in an OFDM symbol immediately preceding the second OFDM symbol to a leading time slot t1 in the second OFDM symbol.

[0042] In one exemplary embodiment, the process of transmitting the target physical sidelink channel comprises: transmitting the target physical sidelink channel in a first OFDM symbol within a slot; transmitting a physical sidelink channel within a first duration t1 of a second OFDM symbol within the slot; and transmitting no PSSCH channel or no physical sidelink channel within a second duration t2 of the second OFDM symbol within the slot, wherein the first OFDM symbols are L consecutive OFDM symbols of duration t in the slot, and the second OFDM symbol is the OFDM symbol immediately following the second OFDM symbol in the first OFDM symbol, where t is equal to the sum of t1 and t2.

[0043] In one exemplary embodiment, the sidelink channel transmitted within t1 of the second OFDM symbol and the sidelink channel transmitted within t1 of the first OFDM symbol are the same.

[0044] In one exemplary embodiment, the process of transmitting the target physical sidelink channel and the PSSCH comprises: transmitting a PSSCH in each of N consecutive slots (N is 2 or more) in the set of sidelink slots; transmitting the target physical sidelink channel in at least one of the N consecutive slots (N is 2 or more); and the duration during which no physical sidelink channel is transmitted in any of the N consecutive slots (N is 2 or more) does not exceed 25 us.

[0045] In one exemplary embodiment, a further technical aspect is proposed, which comprises the step of marking a sidelink resource pool in which the target physical sidelink channel is located as a target sidelink resource pool, wherein the frequency domain resources used by the transmitting terminal to transmit the target physical sidelink channel are the same as the frequency domain resources used by other terminals to transmit their target physical sidelink channels in the sidelink resource pool.

[0046] In one exemplary embodiment, the physical sidelink channel transmission method in the embodiment solves the problem of channel preemption caused by discontinuous transmission of the sidelink channel. The solution is as follows:

[0047] 1. OFDM symbols where the sidelink channel is not transmitted throughout the entire OFDM symbol are deleted. The sidelink channel is not transmitted for a period not exceeding 25 us at the end of an OFDM symbol, but the sidelink channel is still transmitted at the beginning of this OFDM symbol.

[0048] 2. Based on the existing sidelink channel, a new sidelink channel is introduced. The purpose of this new sidelink channel is channel occupation. This new sidelink channel is called the physical sidelink occupied channel. By adding this new channel, the problem of the sidelink channel not being transmitted in the PSFCH symbol can be avoided.

[0049] In addition to the above design, further conditions for restricting the transmission of the physical sidelink dedicated channel may be included. For example, as shown in FIG. 14 (also FIG. 14 in the fourth embodiment), the physical sidelink dedicated channel can be transmitted in the n-th slot in the target slot set only when the following conditions are met: Condition 1: Adjacent slots n and n+1 in the target slot set contain at least a desired sidelink channel other than the target channel; and Condition 2: Adjacent slots n and n+1 in the target slot set do not contain any other slots.

[0050] In FIG. 14, the above condition can be satisfied in the case of the n=2nd slot and the n+1=3rd slot in the target slot set.

[0051] Next, the method for transmitting the physical sidelink channel will be further described according to the following embodiments.

[0052] (Embodiment 1) In this embodiment, the first communication device is a terminal (corresponding to the above-mentioned transmitting terminal), and the second communication device is a base station (corresponding to the above-mentioned communication device), that is, the second communication device is a network.

[0053] In one exemplary embodiment, the communication device includes at least one of a network, a base station, an evolved universal terrestrial radio access (E-UTRA), an evolved base station (eNB, Evolved Node B), a next generation base station (gNB, next generation Node B), and an NG-RAN (Next Generation Radio Access Network).

[0054] At the first communication device side, the first communication device receives an RRC message including information on frequency-domain resource locations of a target channel, the information on frequency-domain resource locations of the target channel being used to configure the frequency-domain location of the target channel, the target channel being a physical sidelink channel, and the usage of the target channel being channel occupancy. The first communication device also transmits the target channel using at least two OFDM symbols, and copies resource elements used for the target channel in a second OFDM symbol of the at least two OFDM symbols to an OFDM symbol immediately preceding the second OFDM symbol.

[0055] Here, the second OFDM symbol of the at least two OFDM symbols is the penultimate symbol of the symbols configured for the sidelink within one slot.

[0056] Here, the RRC message received by the first communication device is an RRC message transmitted from a second communication device.

[0057] The flow of the first communication device receiving the RRC message sent from the second communication device and the first communication device sending the target channel is as shown in FIG. 3, and the specific steps are as follows:

[0058] In step S302, the first communication device determines the frequency domain resource location of the target channel to be transmitted based on the information of the frequency domain resource location of the target channel included in the received RRC message.

[0059] In step S304, the first communication device determines a time domain location of the target channel to be transmitted, and the first communication device determines that the target channel to be transmitted occupies at least two OFDM symbols in one slot.

[0060] As shown in FIG. 4, in step S402, on the second communication device side, the second communication device determines the time domain location of the target channel, and also in step S402, the second communication device sends an RRC message including information of the frequency domain resource location of the target channel to the first communication device.

[0061] As shown in Figure 5 or 6, the second OFDM symbol of the at least two OFDM symbols used by the target channel is the penultimate symbol of the symbols configured for the sidelink in one slot. Resource elements used for the target channel in the second OFDM symbol of the at least two OFDM symbols used by the target channel are copied to the OFDM symbol immediately preceding the second OFDM symbol. The OFDM symbol immediately preceding the second OFDM symbol is the first OFDM symbol of the at least two OFDM symbols used by the target channel.

[0062] After determining the frequency domain location and the time domain location of the target channel to be transmitted by the first communication device, the first communication device transmits the target channel at the determined frequency domain location and the time domain location, where the target channel transmitted by the first communication device is a physical sidelink channel and the usage of the target channel is channel occupancy.

[0063] At the second communication device side, the second communication device transmits an RRC message including information of a frequency domain resource location of a target channel, the information of the frequency domain resource location of the target channel being used to set the frequency domain location of the target channel, the target channel being a physical sidelink channel, and its usage being channel occupancy of the first communication node. (Embodiment 2) At the first communication device side, the first communication device receives an RRC message including information on frequency domain resource location of a target channel, the information on frequency domain resource location of the target channel is used to set the frequency domain location of the target channel, the target channel is a physical sidelink channel, and the usage of the target channel is channel occupancy. The RRC message received by the first communication device is an RRC message transmitted from a second communication device.

[0064] The first communication device determines the frequency domain resource location of the target channel to be transmitted based on the information on the frequency domain resource location of the target channel included in the received RRC message.

[0065] The first communication device also determines a time domain position of the target channel to be transmitted, where the time domain positions at which the target channel can be transmitted are periodic, and the periodic value is denoted as P. The periodic value at which the target channel can be transmitted is equal to the periodic value of the PSFCH included in the RRC message received by the first communication device. The periodic value at which the target channel can be transmitted is a periodic value of the PSFCH within a target slot set, where the target slot set is a slot set of a sidelink resource pool.

[0066] As shown in Figure 7, the target slot set is a slot set of the sidelink resource pool, and if the slot belongs to the sidelink resource pool, it includes the sidelink OFDM symbol, whereas if the slot does not belong to the sidelink resource pool, it does not include the sidelink OFDM symbol.

[0067] At the second communication device side, the second communication device transmits an RRC message including information of a frequency domain resource location of a target channel, the information of the frequency domain resource location of the target channel being used to set the frequency domain location of the target channel, the target channel being a physical sidelink channel, and its usage being channel occupancy of the first communication node.

[0068] Here, the time domain positions at which the target channel can be transmitted are periodic, and the periodic value is denoted as P. The second communication device transmits an RRC message including the periodic value of the PSFCH.

[0069] In one embodiment, if the PSFCH and the target channel belong to the same resource pool, the periodicity value of the PSFCH in the same resource pool as the target channel is set to the time domain periodicity value at which the target channel can be transmitted. (Embodiment 3) At the first communication device side, the first communication device receives an RRC message including information on frequency domain resource location of a target channel, the information on frequency domain resource location of the target channel is used to set the frequency domain location of the target channel, the target channel is a physical sidelink channel, and the usage of the target channel is channel occupancy. The RRC message received by the first communication device is an RRC message transmitted from a second communication device.

[0070] The frequency domain resource location of the target channel set by the RRC message includes at least one of the following:

[0071] The frequency domain resource location of the target channel set by the RRC message does not overlap with the target frequency domain resource location in the frequency domain. The target frequency domain resource location is a frequency domain resource location of a PSFCH in the same resource pool as the target channel set by the second communication device by the RRC message. As shown in Figure 8, the frequency domain resource location of the target channel does not overlap with the frequency domain resource location of the PSFCH.

[0072] As shown in FIG. 9, the frequency domain resource locations of the target channel correspond to M PRBs that are non-contiguous in frequency domain, where M is 5 or greater.

[0073] And / or, the first communication device performs resource mapping for the target channel, specifically, generating a first sequence that is a Zadoff-Chu (ZC) sequence, generating a second sequence, where the generation of the second sequence includes performing a cyclic shift operation on the first sequence, and mapping the second sequence to resource elements corresponding to one OFDM symbol of the target channel. (Embodiment 4) In this embodiment, the first communication device is a terminal, and the second communication device is a base station, that is, the second communication device is a network.

[0074] At the first communication device side, the first communication device receives an RRC message including information on a frequency domain resource location of a target channel, the information on the frequency domain resource location of the target channel being used to configure the frequency domain location of the target channel, the target channel being a physical sidelink channel, and the usage of the target channel being channel occupancy, and the first communication device also receives an RRC message transmitted from a second communication device.

[0075] The first communication device determines the frequency domain resource position of the target channel to be transmitted based on the information on the frequency domain resource position of the target channel included in the received RRC message.

[0076] Here, determining the time domain position of the target channel to be transmitted by the first communication device specifically includes positioning L (L is 2 or more) OFDM symbols capable of transmitting the target channel within one target slot, and the L (L is 2 or more) OFDM symbols capable of transmitting the target channel are referred to as first OFDM symbols.

[0077] In one example, the conditions under which the first communication device can transmit the target channel using the first OFDM symbol include at least one of the following: The RRC signaling received by the first communication device includes configuration information for configuring all OFDM symbols in a slot as symbols used for the sidelink. In FIG. 10, the RRC signaling includes configuration information for configuring all OFDM symbols in a slot as symbols used for the sidelink, so the first communication device can transmit the target channel using the first OFDM symbol usable for transmitting the target channel. In FIG. 11, the configuration information included in the RRC signaling does not configure all OFDM symbols in a slot as symbols used for the sidelink, so the first communication device cannot transmit the target channel using the first OFDM symbol usable for transmitting the target channel.

[0078] In one example, the target slot belongs to a target slot set, and the first communication device transmits at least the PSSCH in a slot immediately following the target slot in the target slot set, and the target slot set is a slot set of a sidelink resource pool. In Figure 12, the target slot is the n-th slot in the target slot set, and the first communication device transmits at least the PSSCH in the (n+1)-th slot in the target slot set, so that the first communication device can transmit the target channel in a first OFDM symbol (an OFDM symbol capable of transmitting the target channel).

[0079] In one example, the target slot belongs to a target slot set, and the first communication device transmits the PSSCH in at least one OFDM symbol belonging to the target slot before the first OFDM symbol in the first OFDM symbol, and the first communication device transmits at least the PSSCH in the slot immediately following the target slot in the target slot set, where the target slot set is a slot set of a sidelink resource pool. In FIG. 13 , the target slot is the nth slot in the target slot set, and the first communication device transmits (within the target slot) the PSSCH in the OFDM symbol located before the first OFDM symbol of the first OFDM symbol (of two OFDM symbols capable of transmitting the target channel) in the target slot n, and the first communication device transmits the PSSCH in the n+1th slot in the target slot set. Thus, the first communication device can transmit the target channel in the first OFDM symbol (the OFDM symbol capable of transmitting the target channel).

[0080] And / or the condition under which the first communication device can transmit the target channel in the first OFDM symbol includes at least one of the following: the first communication device does not transmit a PSFCH in the target slot; and the first communication device does not receive a PSFCH transmitted from another terminal in the target slot.

[0081] And / or the conditions for the first communication device to transmit a target channel in one target slot include that the first communication device transmits at least a PSSCH in a first slot and a second slot, the first slot and the second slot are adjacent slots in a target slot set, the target slot set is a slot set of a sidelink resource pool, no other slot is included between the first slot and the second slot, the first slot is located before the second slot, and the target slot is the first slot.

[0082] In FIG. 14, a slot set consisting of slots corresponding to the sidelink resource pool among slots with slot numbers 0, 1, 2, ... is defined as a target slot set. Slot numbers within the range of the target slot set are referred to as logical slot numbers. A slot with slot number 1 has slot number 0 in the target slot set, i.e., logical slot number 0. A slot with slot number 3 has slot number 1 in the target slot set, i.e., logical slot number 1. A slot with slot number 5 has slot number 2 in the target slot set, i.e., logical slot number 2. A slot with slot number 6 has slot number 3 in the target slot set, i.e., logical slot number 3.

[0083] The first slot is assumed to be the slot number 5 (logical slot number 2) in FIG. 14, and the second slot is assumed to be the slot number 6 (logical slot number 3) in FIG. 14. The target slot is assumed to be the slot number 5 (logical slot number 2) in FIG. 14. It is also assumed that the first communication device transmits at least a PSSCH in the first slot and the second slot. In this case, the following conditions are met:

[0084] The first communication device transmits at least a PSSCH in a first slot (slot 5) and a second slot (slot 6). The first slot and the second slot are adjacent slots in a target slot set, and the target slot set is a slot set of a sidelink resource pool. No other slots are included between the first slot (slot 5) and the second slot (slot 6). The first slot (slot 5) is located before the second slot (slot 6). The target slot is the first slot (slot 5).

[0085] Therefore, the first communication device can transmit the target channel within one target slot.

[0086] Assume that the first slot is the one with slot number 1 (logical slot number 0) in FIG. 14, and the second slot is the one with slot number 3 (logical slot number 1) in FIG. 14. The target slot is the one with slot number 1 (logical slot number 0) in FIG. 14. In this case, since slot 2 is included between the first slot (slot 1) and the second slot (slot 3), the condition that no other slot is included between the first slot (slot 5) and the second slot (slot 6) is not satisfied. Therefore, the first communication device cannot transmit the target channel within the target slot. (Embodiment 5) In this embodiment, the first communication device is a terminal, and the second communication device is a base station, that is, the second communication device is a network.

[0087] At the first communication device side, the first communication device receives an RRC message including information on a frequency domain resource location of a target channel, the information on the frequency domain resource location of the target channel being used to configure the frequency domain location of the target channel, the target channel being a physical sidelink channel, and the usage of the target channel being channel occupancy, and the first communication device also receives an RRC message transmitted from a second communication device.

[0088] The first communication device determines the frequency domain resource location of the target channel to be transmitted based on the information on the frequency domain resource location of the target channel included in the received RRC message.

[0089] Here, the target slot set is a slot set of a sidelink resource pool, and at least one of N consecutive slots (N is 2 or more) in the target slot set includes an OFDM symbol capable of transmitting the target channel. The first communication device performs a channel access process, specifically, The first communication device executes a first channel access process before a first slot of the N slots; The first communication device performs a second channel access process X us (X≦25 us) immediately before a first OFDM symbol capable of transmitting a target channel in at least one of the N slots; Here, the first channel access process / second channel access process is used to monitor whether the channel is idle or not.

[0090] As shown in Fig. 15, when there is K=1 slot including an OFDM symbol capable of transmitting the target channel among the above N slots, the first communication device executes a second channel access process for each of the K=1 slots at X us immediately preceding the OFDM symbol capable of transmitting the target channel. When it is determined that the channel is idle for all of the K second channel access processes corresponding to the above K slots and when it is determined that the channel is idle for the first channel access process, the first terminal transmits at least the PSSCH in each of the N slots. (Embodiment 6) In this embodiment, the first communication device is a terminal, and the second communication device is a base station, that is, the second communication device is a network.

[0091] At the first communication device side, the first communication device receives an RRC message including information on a frequency domain resource location of a target channel, the information on the frequency domain resource location of the target channel being used to configure the frequency domain location of the target channel, the target channel being a physical sidelink channel, and the usage of the target channel being channel occupancy, and the first communication device also receives an RRC message transmitted from a second communication device.

[0092] The first communication device determines the frequency domain resource location of the target channel to be transmitted based on the information on the frequency domain resource location of the target channel included in the received RRC message.

[0093] Here, the first communication device determines a time domain resource location at which the target channel can be transmitted.

[0094] The target slot set is a slot within the slot interval [T1, T2] and belonging to the sidelink resource pool. The first communication device selects N consecutive slots (N is 2 or more) from the target resource set. Specifically, The first communication device selects N consecutive slots from the target slot set, and the first slot of the N consecutive slots is the slot X; The slot X is a slot randomly selected by the first communication device from a target slot set, or the slot X is a slot randomly selected by the first communication device from a subset of the target slot set.

[0095] Further, the first communication device transmits at least a PSSCH in N consecutive slots (N is 2 or more) in the target resource set; At least one slot among N consecutive slots (N is 2 or more) in the target resource set includes an OFDM symbol capable of transmitting a target channel; The first communication device transmits at least a PSSCH in each of N consecutive slots selected from the target slot set, and the first communication device transmits a target channel in an OFDM symbol capable of transmitting the target channel in the N consecutive slots selected from the target slot set. (Embodiment 7) In this embodiment, the first communication device is a terminal, and the second communication device is a base station, that is, the second communication device is a network.

[0096] At the first communication device side, the first communication device receives an RRC message including information on a frequency domain resource location of a target channel, the information on the frequency domain resource location of the target channel being used to configure the frequency domain location of the target channel, the target channel being a physical sidelink channel, and the usage of the target channel being channel occupancy, and the first communication device also receives an RRC message transmitted from a second communication device.

[0097] The first communication device determines the frequency domain resource location of the target channel to be transmitted based on the information on the frequency domain resource location of the target channel included in the received RRC message.

[0098] In one example, the first communication device transmits the target channel in L (where L is 2 or more) consecutive OFDM symbols in one slot, specifically including:

[0099] The L (where L is 2 or more) consecutive OFDM symbols are referred to as a first OFDM symbol, and the OFDM symbol immediately preceding the first OFDM symbol in the first OFDM symbols is referred to as a second OFDM symbol; the first communication device transmits a sidelink channel during a leading time period t1 within the second OFDM symbol; The first communication device does not transmit a PSSCH channel during a trailing time period t2 in the second OFDM symbol, or the first communication device does not transmit any sidelink channel during a trailing time period t2 in the second OFDM symbol; The second OFDM symbol has a duration t, where t=t1+t2.

[0100] In FIG. 16, the first communication device transmits the target channel using L=2 consecutive OFDM symbols in one slot, and these L=2 consecutive OFDM symbols are referred to as the first OFDM symbol. The OFDM symbol immediately preceding the first OFDM symbol in the first OFDM symbol is referred to as the second OFDM symbol. In FIG. 14, the first communication device transmits the sidelink channel in the first time slot t1 in the second OFDM symbol. The first communication device does not transmit the PSSCH channel or any sidelink channel in the last time slot t2 in the second OFDM symbol. The time length of the second OFDM symbol is t=t1+t2.

[0101] Furthermore, the second OFDM symbol is A signal having a duration of t1 in the first OFDM symbol is copied to a leading time period t1 in the second OFDM symbol as shown in FIG. 17; A signal having a duration of t1 in the second OFDM symbol in the first OFDM symbol is copied to a leading time period t1 in the second OFDM symbol as shown in FIG. 18; a signal of duration t1 in the OFDM symbol immediately preceding the second OFDM symbol is copied into the first time period t1 in the second OFDM symbol as shown in FIG. 19. (Embodiment 8) In this embodiment, the first communication device is a terminal, and the second communication device is a base station, that is, the second communication device is a network.

[0102] At the first communication device side, the first communication device receives an RRC message including information on a frequency domain resource location of a target channel, the information on the frequency domain resource location of the target channel being used to configure the frequency domain location of the target channel, the target channel being a physical sidelink channel, and the usage of the target channel being channel occupancy, and the first communication device also receives an RRC message transmitted from a second communication device.

[0103] The first communication device determines the frequency domain resource location of the target channel to be transmitted based on the information on the frequency domain resource location of the target channel included in the received RRC message.

[0104] and / or the first communication device transmits a target channel, specifically, the first communication device transmits the target channel in L (where L is 2 or more) consecutive OFDM symbols in one slot, where the L (where L is 2 or more) consecutive OFDM symbols are referred to as first OFDM symbols; and the first communication device transmits a sidelink channel in an OFDM symbol immediately after a second OFDM symbol in the first OFDM symbols, where the OFDM symbol immediately after the second OFDM symbol in the first OFDM symbols is referred to as a first OFDM symbol. the symbol is designated as a second OFDM symbol; the first communication device transmits a sidelink channel in a leading time period t1 within the second OFDM symbol; the first communication device does not transmit a PSSCH channel in a trailing time period t2 within the second OFDM symbol, or the first communication device does not transmit any sidelink channel in a trailing time period t2 within the second OFDM symbol; and the duration of the second OFDM symbol is t, where t=t1+t2.

[0105] In FIG. 20, the first communication device transmits the target channel using L=2 consecutive OFDM symbols in one slot, and these L=2 consecutive OFDM symbols are referred to as the first OFDM symbol. The OFDM symbol immediately following the second OFDM symbol in the first OFDM symbol is referred to as the second OFDM symbol. In FIG. 20, the first communication device transmits the sidelink channel in the first time slot t1 in the second OFDM symbol. In addition, the first communication device does not transmit the PSSCH channel or any sidelink channel in the last time slot t2 in the second OFDM symbol. The duration of the second OFDM symbol is t=t1+t2.

[0106] In addition to the above, a target channel may be transmitted via a first communication device, and as shown in FIG. 21, the sidelink signal transmitted by the first communication device in the first time slot t1 in the second OFDM symbol is the same as the sidelink signal transmitted in the first time slot t1 in the first OFDM symbol.

[0107] As described in the above embodiments, the methods according to the above embodiments can be realized through software and necessary general-purpose hardware flash forms, and of course can also be realized by hardware, but it will be apparent to those skilled in the art that the former is a more appropriate embodiment in many cases. With this understanding, the technical aspects of the present disclosure can essentially, or the portions that contribute to the prior art, be embodied in the form of a software product, and this computer software product is stored in a storage medium (e.g., ROM / RAM, magnetic disk, optical disk) that includes some instructions for causing a terminal device (which may be a mobile phone, a computer, a server, a network device, etc.) to execute the methods of each embodiment of the present disclosure.

[0108] In this embodiment, a physical sidelink channel transmitting device is further provided, which implements the above-described embodiments and preferred embodiments, and the previously described aspects will be omitted. The term "module" used below refers to a combination of software and / or hardware capable of implementing a predetermined function. While it is preferable to implement the devices described in the following embodiments in software, they can also be implemented in hardware or a combination of software and hardware, and are envisioned.

[0109] 22 is a block diagram of a physical sidelink channel transmission device according to an embodiment of the present disclosure. As shown in FIG. 22, the physical sidelink channel transmission device includes: a receiving module 2202 configured to receive a radio resource control (RRC) message from a communication device, the RRC message including information of a frequency domain resource location of a target physical sidelink channel, the information of the frequency domain resource location of the target physical sidelink channel being used to configure the frequency domain location of the target physical sidelink channel; a determining module 2204 configured to determine a frequency domain location of a target physical sidelink channel, the target physical sidelink channel being configured to occupy time domain or time-frequency resources of a communication channel; Perform resource mapping and after resource mapping Target Physical Sidelink Channel occupy some resource elements in L (where L is 2 or more) orthogonal frequency division multiplexing OFDM symbols in one slot, and copy resource elements mapped to the target channel on a second OFDM symbol to an OFDM symbol immediately preceding the second OFDM symbol; and and a transmitting module 2208 configured to transmit the target physical sidelink channel on the L OFDM symbols in the one slot.

[0110] According to the above embodiment, a radio resource control (RRC) message is received from a communication device, the RRC message including information on frequency-domain resource locations of a target physical sidelink channel, the information on frequency-domain resource locations of the target physical sidelink channel being used to configure the frequency-domain location of the target physical sidelink channel; a frequency-domain location of the target physical sidelink channel is determined, where the target physical sidelink channel is used to occupy time-domain or time-frequency resources of a communication channel; and resource mapping is performed to obtain a frequency-domain resource location of the target physical sidelink channel after resource mapping. Target Physical Sidelink Channel occupies some resource elements in L (where L is 2 or more) orthogonal frequency division multiplexing OFDM symbols in one slot, and copies the resource elements mapped to the target channel on the second OFDM symbol to the OFDM symbol immediately preceding the second OFDM symbol. Furthermore, the target physical sidelink channel is transmitted in the L OFDM symbols in the one slot, thereby solving the problem of channel preemption caused by discontinuous transmission of the sidelink channel.

[0111] In one exemplary embodiment, the second OFDM symbol is the penultimate symbol in a slot configured to transmit a target physical sidelink channel.

[0112] In one exemplary embodiment, the RRC message further includes a periodicity value of a physical sidelink feedback channel PSFCH, and the periodicity value of the target physical sidelink channel is determined based on the periodicity value of the PSFCH.

[0113] In one exemplary embodiment, the frequency domain location of the target physical sidelink channel and the frequency domain location of the PSFCH in the same slot do not overlap.

[0114] In one exemplary embodiment, the frequency domain of the target physical sidelink channel is discrete, and the frequency domain positions of the target physical sidelink channel correspond to M physical resource blocks PRBs that are discontinuous in frequency domain, where M is an integer greater than 5.

[0115] In one exemplary embodiment, the process of resource mapping for the target physical sidelink channel includes: generating a first sequence, which is a ZC sequence; generating a second sequence, wherein the process of generating the second sequence includes a cyclic shift operation on the first sequence; and mapping the second sequence to resource elements corresponding to one OFDM symbol of the target physical sidelink channel.

[0116] In one exemplary embodiment, the transmitting device for the physical sidelink channel transmits the L OFDM symbols in the first OFDM symbol in the one slot. Target Physical Sidelink Channel a first channel transmission module configured to transmit the Target Physical Sidelink Channel The condition for transmitting is that the slot belongs to a sidelink slot set and the RRC message the slot belongs to a sidelink slot set, and at least a PSSCH is transmitted in at least one OFDM symbol belonging to the slot that is before a first OFDM symbol in the first OFDM symbol, and at least a PSSCH is transmitted in a slot that is immediately after the slot in the sidelink slot set.

[0117] In one exemplary embodiment, the physical sidelink channel transmitter comprises a second channel transmission module configured to transmit the target physical sidelink channel over L orthogonal frequency division multiplexing OFDM symbols in one slot, wherein the condition for transmitting the target physical sidelink channel is: transmitting terminal does not transmit a PSFCH in the slot, and transmitting terminal and / or a second channel transmission module configured to transmit the target physical sidelink channel using L orthogonal frequency division multiplexing OFDM symbols in one slot, wherein the condition for not transmitting the target physical sidelink channel includes at least one of: transmitting terminal transmits a PSFCH in the slot; transmitting terminal and receiving, within the slot, a PSFCH transmitted from another terminal.

[0118] In one exemplary embodiment, the conditions for transmitting the target physical sidelink channel in one slot include that the slot belongs to a sidelink slot set, that the transmitting terminal transmits at least a PSSCH in the slot and in the slot immediately following the slot in the sidelink slot set, and that there are no other slots between the slot and the slot immediately following the slot in the sidelink slot set.

[0119] In one exemplary embodiment, at least one slot of N consecutive slots (N is 2 or more) in the sidelink slot set includes an OFDM symbol for transmitting a target physical sidelink channel, Target Physical Sidelink Channelperforming a channel access process before transmitting the target physical sidelink channel includes performing a first channel access process before a first slot of the N slots; and performing a second channel access process in a time period before a transmission time period in at least one slot of the N slots, where the transmission time period indicates a time period of a first OFDM symbol for transmitting the target physical sidelink channel, and the time period before the transmission time period is Y us, where Y≦25.

[0120] In one exemplary embodiment, the transmission device for physical sidelink channels further comprises a slot selection module configured to randomly select one slot X from the set of sidelink slots within one time period or to randomly select one slot X from a subset of slots belonging to the set of sidelink slots within one time period, wherein the terminal transmits at least a PSSCH in each of N consecutive slots starting from slot X in the set of sidelink slots (N being 2 or more), and wherein the terminal transmits at least a target physical sidelink channel in at least one slot out of the N consecutive slots starting from slot X in the set of sidelink slots.

[0121] In one exemplary embodiment, the physical sidelink channel transmission device further comprises a third channel transmission module configured to transmit the target physical sidelink channel in consecutive OFDM symbols in a slot. Specifically, transmitting the target physical sidelink channel in consecutive OFDM symbols in a slot comprises: transmitting the target physical sidelink channel in a first OFDM symbol in the slot; transmitting the target physical sidelink channel within a first duration t1 of a second OFDM symbol in the slot; and transmitting no PSSCH channel or no physical sidelink channel within a second duration t2 of the second OFDM symbol in the slot, wherein the first OFDM symbols are L consecutive symbols of duration t, and the second OFDM symbol is the OFDM symbol immediately preceding the first OFDM symbol in the first OFDM symbol, where t is equal to the sum of t1 and t2.

[0122] In one exemplary embodiment, the resource mapping process on the second OFDM symbol comprises any one of: copying a sidelink channel or signal having a duration of t1 in a first OFDM symbol of the first OFDM symbol to a leading time slot t1 in the second OFDM symbol; copying a sidelink channel or signal having a duration of t1 in a second OFDM symbol of the first OFDM symbol to a leading time slot t1 in the second OFDM symbol; or copying a sidelink channel or signal having a duration of t1 in an OFDM symbol immediately preceding the second OFDM symbol to a leading time slot t1 in the second OFDM symbol.

[0123] In one exemplary embodiment, the process of transmitting the target physical sidelink channel comprises: transmitting the target physical sidelink channel in a first OFDM symbol within a slot; transmitting a physical sidelink channel within a first duration t1 of a second OFDM symbol within the slot; and transmitting no PSSCH channel or no physical sidelink channel within a second duration t2 of the second OFDM symbol within the slot, wherein the first OFDM symbols are L consecutive OFDM symbols of duration t in the slot, and the second OFDM symbol is the OFDM symbol immediately following the second OFDM symbol in the first OFDM symbol, where t is equal to the sum of t1 and t2.

[0124] In one exemplary embodiment, the sidelink channel transmitted within t1 of the second OFDM symbol and the sidelink channel transmitted within t1 of the first OFDM symbol are the same.

[0125] In one exemplary embodiment, the process of transmitting the target physical sidelink channel and the PSSCH comprises: transmitting a PSSCH in each of N consecutive slots (N is 2 or more) in the set of sidelink slots; transmitting the target physical sidelink channel in at least one of the N consecutive slots (N is 2 or more); and the duration during which no physical sidelink channel is transmitted in any of the N consecutive slots (N is 2 or more) does not exceed 25 us.

[0126] In one exemplary embodiment, the transmitting device for a physical sidelink channel further comprises a marking module configured to mark a sidelink resource pool in which the target physical sidelink channel is located as a target sidelink resource pool, wherein the frequency domain resources used by the transmitting terminal when transmitting the target physical sidelink channel are the same as the frequency domain resources used by other terminals when transmitting their target physical sidelink channels in the sidelink resource pool.

[0127] In one exemplary embodiment, the computer-readable storage medium may include, but is not limited to, various media capable of storing a computer program, such as a USB flash disk, a read-only memory (ROM), a random access memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.

[0128] For specific examples of this embodiment, reference can be made to the examples described in the above-described embodiments and exemplary embodiments, and therefore, description thereof will be omitted in this embodiment.

[0129] In an embodiment of the present disclosure, there is further provided an electronic device comprising: a memory having a computer program stored therein; and a processor, the processor configured to execute the computer program to perform the steps of any one of the above method embodiments.

[0130] Optionally, in this embodiment, the processor may be configured by a computer program to perform the following steps:

[0131] At S1, a radio resource control (RRC) message is received from a communication device, the RRC message including information on frequency domain resource locations of a target physical sidelink channel, the information on frequency domain resource locations of the target physical sidelink channel being used to configure the frequency domain location of the target physical sidelink channel.

[0132] In S2, a frequency domain location of a target physical sidelink channel is determined, and the usage of the target physical sidelink channel is to occupy the time domain resource or time-frequency resource of the communication channel.

[0133] In S3, resource mapping is performed, and after resource mapping, Target Physical Sidelink Channel occupies some resource elements in L (where L is 2 or more) orthogonal frequency division multiplexing OFDM symbols in one slot, and the resource elements mapped to the target channel on the second OFDM symbol are copied to the OFDM symbol immediately preceding the second OFDM symbol.

[0134] In S4, the target physical sidelink channel is transmitted using L OFDM symbols in the one slot.

[0135] In one exemplary embodiment, the electronic device may further include a transmission device connected to the processor, and an input / output device connected to the processor.

[0136] For specific examples of this embodiment, reference can be made to the examples described in the above-described embodiments and exemplary embodiments, and therefore, description thereof will be omitted in this embodiment.

[0137] It will be apparent to those skilled in the art that the modules or steps of the present disclosure described above can be implemented by a general-purpose computing device, can be integrated into a single computing device, or can be distributed across a network of multiple computing devices, and can be implemented by program code executable on a computing device, which can be stored in a storage device and executed by a computing device. In some cases, the illustrated or described steps can be executed in a different order from that shown here, or can be implemented by fabricating each module as an integrated circuit module, or by fabricating multiple modules or steps as a single integrated circuit module. Thus, the present disclosure is not limited to any specific combination of hardware and software.

[0138] The above is merely a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Those skilled in the art can make various changes and modifications to the present disclosure. Any modifications, equivalent replacements, improvements, etc. within the principle of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A method for transmitting a physical sidelink channel, performed by a transmitting terminal, comprising: receiving a radio resource control (RRC) message from a communication device, the RRC message including information on frequency domain resource locations of a target physical sidelink channel, the information on frequency domain resource locations of the target physical sidelink channel being used to configure the frequency domain location of the target physical sidelink channel; determining a frequency domain location of a target physical sidelink channel, the target physical sidelink channel being used to occupy time domain or time-frequency resources of a communication channel; performing resource mapping such that the target physical sidelink channel after resource mapping occupies some resource elements in L (where L is 2 or more) orthogonal frequency division multiplexing OFDM symbols in one slot, and copying the resource elements mapped to the target channel on a second OFDM symbol to an OFDM symbol immediately preceding the second OFDM symbol; transmitting the target physical sidelink channel on L OFDM symbols in the one slot; A method for transmitting a physical sidelink channel, comprising:

2. 2. The method of claim 1, wherein the second OFDM symbol is the penultimate symbol of symbols configured to transmit the target physical sidelink channel in a slot.

3. the RRC message further includes a periodicity value of a physical sidelink feedback channel (PSFCH); 2. The method of claim 1, wherein the periodicity value of the target physical sidelink channel is determined based on the periodicity value of a PSFCH.

4. 2. The method of claim 1, wherein the frequency domain location of the target physical sidelink channel and the frequency domain location of the PSFCH in the same slot do not overlap.

5. 5. The method of claim 4, wherein the target physical sidelink channel is discrete in frequency domain, and the frequency-domain positions of the target physical sidelink channel correspond to M physical resource blocks (PRBs) that are discontinuous in frequency domain, where M is an integer greater than 5.

6. the process of resource mapping of the target physical sidelink channel, generating a first sequence that is a ZC sequence; generating a second sequence, wherein the process of generating the second sequence includes a cyclic shift operation on the first sequence; and mapping the second sequence to resource elements corresponding to one OFDM symbol of the target physical sidelink channel.

7. transmitting the target physical sidelink channel in a first OFDM symbol among the L OFDM symbols in one slot, wherein a condition for transmitting the target physical sidelink channel in the first OFDM symbol in one slot is: the slot belongs to a sidelink slot set, and the RRC message includes configuration information for configuring all OFDM symbols in the slot as symbols used for the sidelink; the slot belongs to a sidelink slot set, and at least a PSSCH is transmitted in a slot immediately following the slot in the sidelink slot set; 2. The method of claim 1, further comprising: transmitting a physical sidelink shared channel (PSSCH) in at least one OFDM symbol belonging to a sidelink slot set, the physical sidelink shared channel (PSSCH) being transmitted in at least one OFDM symbol belonging to the slot before a first OFDM symbol in the first OFDM symbol set; and transmitting at least a PSSCH in a slot immediately following the slot in the sidelink slot set.

8. transmitting the target physical sidelink channel over L orthogonal frequency division multiplexing (OFDM) symbols in one slot, the condition for transmitting the target physical sidelink channel being: The transmitting terminal does not transmit a PSFCH in the slot; The transmitting terminal does not receive a PSFCH transmitted from another terminal in the slot; or The target physical sidelink channel is transmitted using L orthogonal frequency division multiplexing OFDM symbols in one slot, and the condition for not transmitting the target physical sidelink channel is: The transmitting terminal transmits a PSFCH in the slot; 2. The method of claim 1, further comprising: receiving, by the transmitting terminal, a PSFCH transmitted from another terminal within the slot.

9. The condition for transmitting the target physical sidelink channel within one slot is: the slot belongs to a sidelink slot set, and the transmitting terminal transmits at least a PSSCH in the slot and in a slot immediately following the slot in the sidelink slot set; 2. The method of claim 1, further comprising: no other slots between the slot and the slot immediately following the slot in the set of sidelink slots.

10. A method for transmitting a target physical sidelink channel in a set of N consecutive slots (where N is 2 or more), wherein at least one slot contains an OFDM symbol for transmitting a target physical sidelink channel; performing a channel access process before transmitting the target physical sidelink channel; performing a first channel access process prior to a first slot of the N slots; 2. The method of claim 1, further comprising: performing a second channel access process in a time slot prior to a transmission time slot in at least one of the N slots, the transmission time slot indicating a time slot of a first OFDM symbol for transmitting a target physical sidelink channel, the time slot prior to the transmission time slot being Y us, and Y≦25.

11. - randomly selecting one slot X from a set of sidelink slots within one time period, or randomly selecting one slot X from a subset of slots belonging to the set of sidelink slots within one time period; the terminal transmits at least a PSSCH in each of N consecutive slots (N is 2 or more) starting from slot X in the sidelink slot set; 2. The method of claim 1, further comprising: transmitting at least the target physical sidelink channel in at least one slot among N consecutive slots starting from slot X in the sidelink slot set.

12. transmitting the target physical sidelink channel in consecutive OFDM symbols in one slot, specifically transmitting the target physical sidelink channel in a first OFDM symbol in the one slot; transmitting the target physical sidelink channel within a first duration t1 of a second OFDM symbol in the one slot; and transmitting no PSSCH channel or no physical sidelink channel within a second duration t2 of a second OFDM symbol in said one slot; 2. The method of claim 1, wherein the first OFDM symbol is a sequence of L consecutive symbols of duration t, the second OFDM symbol is the OFDM symbol immediately preceding the first OFDM symbol in the first OFDM symbol sequence, and t is equal to the sum of t1 and t2.

13. The resource mapping process on the second OFDM symbol comprises: copying a sidelink channel or a sidelink signal having a duration of t1 in a first OFDM symbol in the first OFDM symbol into a leading time slot t1 in the second OFDM symbol; copying a sidelink channel or a sidelink signal having a duration of t1 in a second OFDM symbol of the first OFDM symbol into a first time slot t1 in the second OFDM symbol; and copying a sidelink channel or a sidelink signal having a duration of t1 in an OFDM symbol immediately preceding the second OFDM symbol into a first time slot t1 in the second OFDM symbol.

14. the step of transmitting a target physical sidelink channel comprises: transmitting the target physical sidelink channel in a first OFDM symbol in a slot; transmitting a physical sidelink channel within a first duration t1 of a second OFDM symbol in said one slot; and transmitting no PSSCH channel or no physical sidelink channel within a second duration t2 of a second OFDM symbol in said one slot; 2. The method of claim 1, wherein the first OFDM symbol is L consecutive OFDM symbols of duration t in one slot, the second OFDM symbol is the OFDM symbol immediately following a second OFDM symbol in the first OFDM symbol sequence, and t is equal to the sum of t1 and t2.

15. 15. The method of claim 14, wherein the sidelink channel transmitted within t1 of the second OFDM symbol is the same as the sidelink channel transmitted within t1 of the first OFDM symbol.

16. the step of transmitting a target physical sidelink channel and a PSSCH comprises: transmitting a PSSCH in each of N consecutive slots (N is 2 or greater) in a sidelink slot set; transmitting the target physical sidelink channel in at least one slot of the N consecutive slots (N is 2 or more); 2. The method of claim 1, further comprising: a duration during which no physical sidelink channel is transmitted in any of the N consecutive slots (N is 2 or greater) that does not exceed 25 μs.

17. 2. The method of claim 1, further comprising: marking a sidelink resource pool in which the target physical sidelink channel is located as a target sidelink resource pool, wherein the frequency domain resources used by the transmitting terminal to transmit the target physical sidelink channel are the same as the frequency domain resources used by other terminals to transmit the target physical sidelink channel in the sidelink resource pool.

18. a receiving module configured to receive a radio resource control (RRC) message from a communication device, the RRC message including information on frequency domain resource locations of a target physical sidelink channel, the information on frequency domain resource locations of the target physical sidelink channel being used to configure the frequency domain location of the target physical sidelink channel; and a determining module configured to determine a frequency-domain location of a target physical sidelink channel, the target physical sidelink channel being used to occupy time-domain or time-frequency resources of a communication channel; and a mapping module configured to perform resource mapping such that the target physical sidelink channel after resource mapping occupies a number of resource elements in L orthogonal frequency division multiplexing OFDM symbols in one slot, where L is equal to or greater than one, and to copy the resource elements mapped to the target channel on a second OFDM symbol to an OFDM symbol immediately preceding the second OFDM symbol; and a transmission module configured to transmit the target physical sidelink channel on L OFDM symbols in the one slot; A physical sidelink channel transmitting device comprising:

19. A computer program configured to cause a computer to perform the method for transmitting a physical sidelink channel according to any one of claims 1 to 17.

20. 18. An electronic device comprising: a memory having a computer program stored therein; and a processor configured to execute the method for transmitting a physical sidelink channel according to any one of claims 1 to 17 by means of the computer program.

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