Method and device for transmitting physical sidelink channel, 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 on March 18, 2022 with the China Patent Office, 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 the UEs is transmitted directly to the target UE via the sidelink by the data source UE without going through the network side, i.e., without being transferred via a cellular link between the UE and the base station. Such a direct communication mode between UEs has characteristics that are clearly distinguished from the communication modes of conventional cellular systems. Typical applications of sidelink communication include device-to-device (D2D) communication and vehicle to everything (V2X) communication. Here, the vehicle to everything (V2X) communication includes vehicle to vehicle (V2V) communication, vehicle to pedestrian (V2P) communication, and vehicle to infrastructure (V2I) communication. For short-range communication users who can apply sidelink communication, sidelink communication can not only save wireless spectrum resources, but also relieve data transmission pressure on the core network, reduce the occupation of system resources, improve the spectral efficiency of cellular communication systems, reduce communication delays, and significantly save network operation costs.

[0004] Meanwhile, the current sidelink design only considers the ITS (Intelligent Transport System) spectrum and licensed spectrum allocated to network operators, and does not consider the design for unlicensed spectrum. In the existing sidelink, several sidelink channels can be included in one slot, and the sidelink channels in one slot include a sidelink control channel PSCCH (Physical sidelink control channel), a sidelink shared channel PSSCH (Physical sidelink shared channel), and a sidelink feedback channel PSFCH (Physical sidelink feedback channel). In addition, one slot further includes an OFDM symbol that does not transmit any sidelink channel throughout the symbol.

[0005] In an unlicensed spectrum, only channels that have successfully completed Listen Before Talk (LBT) can transmit. LBT means that a communication node needs to compete for resources, and the communication node can transmit information on a time-frequency resource only if it succeeds in competing for the time-frequency resource. More specifically, in the LBT mechanism, the communication node performs a channel access process (monitors whether the channel is idle) prior to information transmission, and only if it monitors that the channel is idle can the communication node transmit information.

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

[0007] In addition, when the above-mentioned designs for ITS spectrum and licensed spectrum are applied to unlicensed spectrum, the result is a high LBT failure probability. One of the reasons for the high LBT failure probability is that the existing sidelink design includes OFDM symbols that do not transmit the sidelink channel over the entire symbol, and if the sidelink channel is not transmitted over the entire OFDM symbol, the resources that the terminal competes for may be preempted by other communication nodes during the channel occupation time. In addition, in the existing sidelink design, due to the existence of the PSFCH symbol, the transmission of the sidelink channel transmitted by the terminal becomes discontinuous, and especially when the terminal needs to transmit the sidelink channel on the next slot of the PSFCH symbol, the discontinuous transmission of the sidelink channel is even more serious. If the transmission of the sidelink channel is discontinuous, the time-frequency resource during the channel occupation time may be preempted 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 caused by discontinuous transmission of a SIDELINK channel. [Means for solving the problem]

[0010] According to an aspect of an embodiment of the present disclosure, there is provided a method for transmitting a physical sidelink channel, the method comprising: 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 configure 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 or time-frequency resource of a communication channel; performing resource mapping such that the target physical channel after resource mapping occupies a number of resource elements in L OFDM symbols in a slot, L being 2 or more, 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; and transmitting the target physical sidelink channel on the L OFDM symbols in the slot.

[0011] According to another aspect of the present disclosure, there is further provided an apparatus for transmitting a physical sidelink channel, comprising: a receiving module 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 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 determining module being configured to occupy time-domain or time-frequency resources of a communication channel; a mapping module configured to perform resource mapping such that the target physical channel after resource mapping occupies a number of resource elements in L orthogonal frequency division multiplexing OFDM symbols in one slot, L being ≥ 1, and configured 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 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 processor executing the method for transmitting a physical sidelink channel by the computer program. Effect of the Invention

[0014] According to the present disclosure, a radio resource control (RRC) message is received from a communication device, the RRC message includes information of a frequency domain resource location of a target physical sidelink channel, and the information of the frequency domain resource location of the target physical sidelink channel is used to set the frequency domain location of the target physical sidelink channel. A frequency domain location of the target physical sidelink channel is determined, and the target physical sidelink channel is used to occupy a time domain resource or a time-frequency resource of a communication channel. Then, resource mapping is performed so 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, and the resource elements mapped to the target channel on the second OFDM symbol are copied to the OFDM symbol immediately before the second OFDM symbol. Then, the target physical sidelink channel is transmitted on the L OFDM symbols in the one slot. This solves the problem of channel preemption caused by discontinuous transmission of a sidelink channel.

[0015] The drawings described herein are intended to facilitate a better understanding of the present disclosure, constitute a part of the present disclosure, and 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 description of the drawings]

[0016] [Figure 1] FIG. 13 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. [Diagram 2] 1 is a flowchart of a method for transmitting a physical sidelink channel according to an embodiment of the present disclosure. [Diagram 3]1 is a flowchart of a physical sidelink channel transmission method applied to a first communication device according to an embodiment of the present disclosure. [Figure 4] 1 is a flowchart of a physical sidelink channel transmission method applied to a second communication device according to an embodiment of the present disclosure. [Diagram 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 collection according to an embodiment of the present disclosure. [Figure 8] FIG. 1 is a schematic diagram (part 1) of a target frequency domain resource location 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. 3 is a schematic diagram (part 3) of OFDM symbols usable for a target channel in accordance with an embodiment of the present disclosure. [Figure 13] FIG. 4 is a schematic diagram (part 4) of OFDM symbols usable for a target channel in accordance with an embodiment of the present disclosure. [Figure 14] FIG. 2 is a schematic diagram of a target slot collection according to an embodiment of the present disclosure. [Figure 15] 1 is a schematic diagram of a case where there are K slots including 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]2 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] 5 is a schematic diagram of a second OFDM symbol according to an embodiment of the present disclosure. [Figure 21] FIG. 6 is a schematic diagram of a second OFDM symbol according to an embodiment of the present disclosure. [Figure 22] FIG. 1 is a configuration block diagram of a physical sidelink channel transmitting device according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] In the following, the technical aspects of the embodiments of the present disclosure will be clearly and completely described with reference to the drawings of the embodiments of the present disclosure, so that those skilled in the art can better understand the aspects 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 labor should all be included in the protection scope of the present disclosure.

[0018] In addition, the terms "first", "second", and the like in the specification and claims of the present disclosure and the drawings described above are intended to distinguish between similar objects, and are not intended to describe a specific order or priority. It should be understood that the numbers used in this manner can be interchanged where appropriate to allow the embodiments of the present disclosure described herein to be implemented in an order other than the order shown or described herein. In addition, the terms "including", "having" and any variations thereof are intended to cover what is included without being exclusive, for example, a process, method, system, product, or device including a series of steps or units need not be limited to the steps or units explicitly shown, but may include steps or units not explicitly shown for these processes, methods, products, or devices, or other steps or units inherent thereto.

[0019] In order to better understand the following embodiments, some technical terms in this disclosure are 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.

[0021] The embodiment of the method provided in the embodiment of the present disclosure may be executed on a computer terminal or a similar computing device. As an example of execution on a computer terminal, FIG. 1 is a hardware configuration block diagram of a computer terminal of the physical sidelink channel transmission method of the embodiment of the present disclosure. As shown in FIG. 1, the computer terminal may include one or more (only one is shown in FIG. 1) processors 202 (the processor 202 may include, but is not limited to, a microprocessor (Microprocessor Unit, simply referred to as MPU) or a programmable logic device (simply referred to as PLD)) 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 a communication function. It is understood by those skilled in the art that the configuration shown in FIG. 1 is merely schematic and does not limit the configuration of the computer terminal. For example, the computer terminal may further include more or less components than those shown in FIG. 1, or may have a different configuration with functions equivalent to those shown in FIG. 1 or more functions than those 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 method for transmitting a physical sidelink channel in an embodiment of the present disclosure, and the processor 202 executes the computer programs stored in the memory 204 to perform various functional applications and data processing, i.e., to realize the above-mentioned method. The memory 204 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 204 may further include memories located remotely with respect to the processor 202, and these remote memories may be connected to the computer terminal via a network. Examples of the above 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 via a network. An example of the network may include a wireless network provided by a communication vendor of the computer terminal. In one example, the transmission device 206 includes a network adapter (Network Interface Controller, simply referred to as 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 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.

[0026] In step S204, a frequency domain location of a target physical sidelink channel is determined, said 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 so 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, 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.

[0028] In step S208, the target physical sidelink channel is transmitted on 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 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 is used to set the frequency domain location of the target physical sidelink channel. A frequency domain location of the target physical sidelink channel is determined, and the target physical sidelink channel is used to occupy a time domain resource or a time-frequency resource of a communication channel. Then, resource mapping is performed so 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, and the resource elements mapped to the target channel on the second OFDM symbol are copied to the OFDM symbol immediately before the second OFDM symbol. Then, the target physical sidelink channel is transmitted 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, a further technical aspect is proposed, wherein the second OFDM symbol is the penultimate symbol in a slot of symbols configured for transmitting 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, the frequency domain locations of the target physical sidelink channel corresponding 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 of the target physical sidelink channel includes generating a first sequence, which is a ZC sequence, generating a second sequence, wherein the generation process of 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, a technical aspect is further proposed comprising a step of transmitting the target physical channel in a first OFDM symbol, which is L OFDM symbols in the one slot, wherein conditions for transmitting the target physical channel in the first OFDM symbol in a slot include at least one of: the slot belongs to a sidelink slot set and the RRC information includes configuration information for setting all OFDM symbols in the slot as symbols used for 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; 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, a technical aspect is further proposed comprising the steps of: transmitting the target physical sidelink channel with L orthogonal frequency division multiplexing OFDM symbols in one slot, wherein a condition for transmitting the target physical sidelink channel comprises at least one of: the terminal not transmitting a PSFCH in the slot and the terminal not receiving a PSFCH transmitted from another terminal in the slot; or transmitting the target physical sidelink channel with L orthogonal frequency division multiplexing OFDM symbols in one slot, wherein a condition for not transmitting the target physical sidelink channel comprises at least one of: the terminal transmitting a PSFCH in the slot and the terminal receiving a PSFCH transmitted from another terminal in the slot.

[0037] In one exemplary embodiment, a further proposed technical aspect is that the condition for transmitting the target physical sidelink channel in one slot comprises that the slot belongs to a sidelink slot set, the transmitting terminal transmits at least a PSSCH in the slot and transmits at least a PSSCH in the slot immediately following the slot in the sidelink slot set, and no other slots are included 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 being 2 or more) in the sidelink slot set contains an OFDM symbol for transmitting a target physical sidelink channel, and performing a channel access process before transmitting the target physical channel comprises performing a first channel access process before a first slot of the N slots and performing a second channel access process in a time slot before a transmission time slot in the at least one slot of the N slots, wherein the transmission time slot indicates a time slot of a first OFDM symbol for transmitting the target physical sidelink channel, the time slot before the transmission time slot being Y us, and wherein Y≦25.

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

[0040] In one exemplary embodiment, a technical aspect is further 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 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 the second OFDM symbol in the one slot, wherein the first OFDM symbols are L consecutive symbols of duration t and the second OFDM symbol is the OFDM symbol immediately preceding a 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 duration 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 duration t1 in a second OFDM symbol of the first OFDM symbol to a leading time slot t1 in the second OFDM symbol; and copying a sidelink channel or signal having duration 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 in a slot; transmitting a 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, where the first OFDM symbol is L consecutive OFDM symbols of duration t in the slot and the second OFDM symbol is the OFDM symbol immediately following a 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 sidelink slot set; transmitting the target physical sidelink channel in at least one slot 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, where 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.

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

[0047] 1. The OFDM symbol in which the sidelink channel is not transmitted throughout the entire OFDM symbol is deleted. The sidelink channel is not transmitted for a period not exceeding 25us 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 added, and the purpose of this new sidelink channel is channel occupation. This new sidelink channel is called physical sidelink occupied channel. By adding a new channel, the problem that the sidelink channel cannot be transmitted in the PSFCH symbol can be avoided.

[0049] In addition to the above design, a condition for restricting the transmission of the physical sidelink dedicated channel may be further included. For example, as shown in Fig. 14 (also Fig. 14 in embodiment 4), the physical sidelink dedicated channel can be transmitted in the n-th slot in the target slot set only when the following conditions are satisfied: Condition 1: Adjacent slot n and slot n+1 in the target slot set include at least a sidelink channel to be transmitted other than the target channel; Condition 2: Adjacent slot n and slot n+1 in the target slot set do not include other slots.

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

[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 of a frequency domain resource location of a target channel, the information of the 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 first communication device also transmits the target channel in at least two OFDM symbols. Then, the first communication device 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 before 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 in one slot.

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

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

[0058] In step S302, the first communication device determines a 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 a time domain location of a target channel, and also in step S402, the second communication device sends an RRC message including information of a frequency domain resource location of the target channel to the first communication device.

[0061] As shown in Fig. 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 the first communication device determines the frequency domain location and the time domain location of the target channel to be transmitted, 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 sends 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 is used to set the frequency domain location of the target channel, the target channel is a physical sidelink channel, and its usage is 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 of a frequency domain resource location of a target channel, the information of the 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 sent from a second communication device.

[0064] The first communication device determines a frequency domain resource location of the target channel to transmit based on the information of 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 periodicity value is denoted as P. The periodicity value at which the target channel can be transmitted is equal to the periodicity value of the PSFCH included in the RRC message received by the first communication device. The periodicity value at which the target channel can be transmitted is a periodicity 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 for a slot that belongs to the sidelink resource pool, the OFDM symbol for the sidelink is included. For a slot that does not belong to the sidelink resource pool, the OFDM symbol for the sidelink is not included.

[0067] At the second communication device side, the second communication device sends 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 is used to set the frequency domain location of the target channel, the target channel is a physical sidelink channel, and its usage is channel occupancy of the first communication node.

[0068] Here, the time domain positions where the target channel can be transmitted are periodic, and the periodicity value is denoted as P. The second communication device transmits an RRC message including the periodicity 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 of a frequency domain resource location of a target channel, the information of the 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 sent 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 FIG. 8, the frequency domain resource location of the target channel does not overlap with the frequency domain resource location of a 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 in the frequency domain, where M is 5 or greater.

[0073] And / or, the first communication device performs resource mapping for the target channel, specifically, includes: generating a first sequence which 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 of a frequency domain resource location of a target channel, the information of the 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 a usage of the target channel is channel occupancy. Also, the first communication device receives an RRC message sent 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 of 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 condition under which the first communication device can transmit the target channel in the first OFDM symbol includes at least one of the following: That is, the RRC signaling received by the first communication device includes configuration information for setting all OFDM symbols in a slot as symbols used for a sidelink. In FIG. 10, the RRC signaling includes configuration information for setting all OFDM symbols in a slot as symbols used for a sidelink, so that the first communication device can transmit the target channel in the first OFDM symbol available for transmitting the target channel. In FIG. 11, the configuration information included in the RRC signaling does not set all OFDM symbols in a slot as symbols used for a sidelink, so that the first communication device cannot transmit the target channel in the first OFDM symbol available 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 a 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 FIG. 12, the target slot is the n-th slot in the target slot set, and the first communication device transmits at least a PSSCH in the n+1-th slot in the target slot set, so that the first communication device can transmit the target channel in the first OFDM symbol (the OFDM symbol capable of transmitting the target channel).

[0079] In one example, the target slot belongs to a target slot set, 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 n-th slot in the target slot set, the first communication device transmits the PSSCH in the OFDM symbol located before the first OFDM symbol of the first OFDM symbol (two OFDM symbols capable of transmitting the target channel) in the target slot n (within the target slot), and the first communication device transmits the PSSCH in the n+1-th 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 first communication device not transmitting a PSFCH in the target slot; and the first communication device not receiving a PSFCH transmitted from another terminal in the target slot.

[0081] And / or the condition for the first communication device to transmit a target channel in one target slot includes: 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 slots are 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 a 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 its slot number 0 in the target slot set, i.e., its logical slot number is 0. A slot with slot number 3 has its slot number 1 in the target slot set, i.e., its logical slot number is 1. A slot with slot number 5 has its slot number 2 in the target slot set, i.e., its logical slot number is 2. A slot with slot number 6 has its slot number 3 in the target slot set, i.e., its logical slot number is 3.

[0083] The first slot is assumed to be the one with slot number 5 (logical slot number 2) in FIG. 14, and the second slot is assumed to be the one with slot number 6 (logical slot number 3) in FIG. 14. The target slot is assumed to be the one with slot number 5 (logical slot number 2) in FIG. 14. And, it is assumed that the first communication device transmits at least PSSCH in the first slot and the second slot. In this case, the following condition is satisfied.

[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 slot is 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 in one target slot.

[0086] 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 in 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 of a frequency domain resource location of a target channel, the information of the 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 a usage of the target channel is channel occupancy. Also, the first communication device receives an RRC message sent from a second communication device.

[0088] The first communication device determines a frequency domain resource location of the target channel to transmit based on the information of 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 a target channel, and the first communication device performs a channel access process, specifically, The first communication device performs a first channel access process before a first slot of the N slots; The first communication device performs a second channel access process in 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 the channel is determined to be 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 of a frequency domain resource location of a target channel, the information of the 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 a usage of the target channel is channel occupancy. Also, the first communication device receives an RRC message sent from a second communication device.

[0092] The first communication device determines a frequency domain resource location of the target channel to transmit based on the information of 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 a first slot among 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] In addition, 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 of 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 of a frequency domain resource location of a target channel, the information of the 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 a usage of the target channel is channel occupancy. Also, the first communication device receives an RRC message sent from a second communication device.

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

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

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

[0100] In FIG. 16, the first communication device transmits a target channel using L=2 consecutive OFDM symbols in one slot, and the L=2 consecutive OFDM symbols are referred to as a first OFDM symbol. The OFDM symbol immediately before the first OFDM symbol in the first OFDM symbol is referred to as a second OFDM symbol. In FIG. 14, the first communication device transmits a sidelink channel in a leading time slot t1 in the second OFDM symbol. The first communication device does not transmit a PSSCH channel or does not transmit any sidelink channel in a trailing 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 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 a leading 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 of a frequency domain resource location of a target channel, the information of the 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 a usage of the target channel is channel occupancy. Also, the first communication device receives an RRC message sent from a second communication device.

[0103] The first communication device determines a frequency domain resource location of the target channel to transmit based on the information of 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 (L is 2 or more) consecutive OFDM symbols in one slot, where the L (L is 2 or more) consecutive OFDM symbols are referred to as a first OFDM symbol, and the first communication device transmits a sidelink channel in an OFDM symbol immediately after a second OFDM symbol in the first OFDM symbol, where the OFDM symbol immediately after the second OFDM symbol in the first OFDM symbol is referred to as a first OFDM symbol. the symbol is designated 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 a duration of the second OFDM symbol is t, where t=t1+t2.

[0105] In FIG. 20, the first communication device transmits a target channel in L=2 consecutive OFDM symbols in one slot, and the 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 a sidelink channel in the first time slot t1 in the second OFDM symbol. In addition, the first communication device does not transmit a PSSCH channel or does not transmit any sidelink channel in the last time slot t2 in the second OFDM symbol. And the time length of the second OFDM symbol is t=t1+t2.

[0106] In addition to the above, a target channel may be further 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 platforms, and of course can also be realized by hardware, but in many cases, it is clear to those skilled in the art that the former is a more suitable embodiment. With this understanding, the technical aspects of the present disclosure can be essentially 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, or a network device, etc.) to execute the methods of each embodiment of the present disclosure.

[0108] In this embodiment, a transmitting device for a physical sidelink channel is further provided, which realizes the above-mentioned embodiments and preferred embodiments, and the previously described ones are omitted. The term "module" used below means a combination of software and / or hardware capable of realizing a certain function. Although it is preferable to realize the devices described in the following embodiments by software, they can also be realized by hardware or a combination of software and hardware, and are envisioned.

[0109] FIG. 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; a mapping module 2206 configured to perform resource mapping such that a target physical channel after resource mapping occupies some resource elements in L orthogonal frequency division multiplexing OFDM symbols in one slot, where L is 2 or more, 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 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 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 is used to set 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 a time domain resource or a time-frequency resource of a communication channel. Then, resource mapping is performed to make the target physical channel after resource mapping occupy some resource elements in L (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 before the second OFDM symbol. Then, 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, the frequency domain locations of the target physical sidelink channel corresponding 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 of the target physical sidelink channel includes generating a first sequence, which is a ZC sequence, generating a second sequence, wherein the generation process of 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 transmission device for a physical sidelink channel further comprises a first channel transmission module configured to transmit the target physical channel in a first OFDM symbol, which is the L OFDM symbols in the one slot, wherein conditions for transmitting the target physical channel in the first OFDM symbol in a slot include at least one of: the slot belongs to a sidelink slot set and the RRC information includes configuration information for setting all OFDM symbols in the slot as symbols used for sidelink; the slot belongs to the sidelink slot set and at least a PSSCH is transmitted in a slot immediately following the slot in the sidelink slot set; 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.

[0117] In one exemplary embodiment, the transmission device for a physical sidelink channel further comprises a second channel transmission module configured to transmit the target physical sidelink channel with L orthogonal frequency division multiplexed OFDM symbols in one slot, wherein a condition for transmitting the target physical sidelink channel comprises at least one of: the terminal not transmitting a PSFCH in the slot and / or the terminal not receiving a PSFCH transmitted from another terminal in the slot; or the second channel transmission module configured to transmit the target physical sidelink channel with L orthogonal frequency division multiplexed OFDM symbols in one slot, wherein a condition for not transmitting the target physical sidelink channel comprises at least one of: the terminal transmitting a PSFCH in the slot and / or the terminal receiving a PSFCH transmitted from another terminal in the slot.

[0118] In one exemplary embodiment, the conditions for transmitting the target physical sidelink channel in a slot include that the slot belongs to a sidelink slot set, that the transmitting terminal transmits at least a PSSCH in the slot and that the transmitting terminal transmits at least a PSSCH 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 being 2 or more) in the sidelink slot set contains an OFDM symbol for transmitting a target physical sidelink channel, and performing a channel access process before transmitting the target physical channel comprises performing a first channel access process before a first slot of the N slots and performing a second channel access process in a time slot before a transmission time slot in the at least one slot of the N slots, wherein the transmission time slot indicates a time slot of a first OFDM symbol for transmitting the target physical sidelink channel, the time slot before the transmission time slot being Y us, and wherein Y≦25.

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

[0121] In one exemplary embodiment, the physical sidelink channel transmission device further comprises a third channel transmission module configured to transmit a 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 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 the second OFDM symbol in the one slot, wherein the first OFDM symbols are L consecutive symbols of duration t, and the second OFDM symbol is the OFDM symbol immediately preceding a 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 duration 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 duration t1 in a second OFDM symbol of the first OFDM symbol to a leading time slot t1 in the second OFDM symbol; and copying a sidelink channel or signal having duration 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 in a slot; transmitting a 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, where the first OFDM symbol is L consecutive OFDM symbols of duration t in the slot and the second OFDM symbol is the OFDM symbol immediately following a 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 sidelink slot set; transmitting the target physical sidelink channel in at least one slot 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, whereby 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.

[0127] In one exemplary embodiment, the computer-readable storage medium may include various media capable of storing a computer program, such as, but not limited to, 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-mentioned embodiments and exemplary embodiments, and therefore the 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 method embodiments described above.

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

[0131] At S1, a radio resource control (RRC) message is received 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.

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

[0133] In S3, resource mapping is performed so 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, 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 in 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-mentioned embodiment and exemplary embodiment, and therefore the description thereof will be omitted in this embodiment.

[0137] It will be obvious to those skilled in the art that each module or step of the present disclosure described above can be realized by a general-purpose computing device, and if it can be integrated into a single computing device, it can also be distributed over a network consisting of multiple computing devices, and furthermore, since it can be realized by program codes executable by computing devices, they can be stored in a storage device and executed by a computing device, and in some cases, the illustrated or described steps can be executed in a different order from that shown here, or each can be manufactured as an integrated circuit module, or multiple modules or steps can be manufactured 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 modifications and variations to the present disclosure. Any modifications, equivalent replacements, improvements, etc. within the principle of the present disclosure should be included within 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 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 a 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 channel after resource mapping occupies some resource elements in L (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 a 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 a periodicity value of a PSFCH.

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

5. 5. The method of claim 4, wherein the frequency domain of the target physical sidelink channel is discrete, and the frequency domain locations 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 includes: generating a first sequence, the first sequence being 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 onto resource elements corresponding to one OFDM symbol of the target physical sidelink channel.

7. Transmitting the target physical channel in a first OFDM symbol, which is L OFDM symbols in the one slot, wherein a condition for transmitting the target physical channel in the first OFDM symbol in a one slot is The slot belongs to a sidelink slot set, and the RRC information includes configuration information for configuring all OFDM symbols in the slot as symbols used for a 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: the slot belonging to a sidelink slot set; and wherein a physical sidelink shared channel (PSSCH) is transmitted in at least one OFDM symbol belonging to the slot before a first OFDM symbol in the first OFDM symbol set; and / or wherein at least a PSSCH is transmitted in a slot immediately following the slot in the sidelink slot set.

8. transmitting the target physical sidelink channel on L orthogonal frequency division multiplexing OFDM symbols in one slot, wherein a condition for transmitting the target physical sidelink channel is: The terminal does not transmit a PSFCH in the slot; At least one of the terminal not receiving a PSFCH transmitted from another terminal in the slot, or transmitting the target physical sidelink channel on L orthogonal frequency division multiplexing OFDM symbols in one slot, wherein a condition for not transmitting the target physical sidelink channel is: The terminal transmits a PSFCH in the slot; and and / or the terminal receiving, in the slot, a PSFCH transmitted from another terminal.

9. The condition for transmitting the target physical sidelink channel in one slot is: the slot belongs to a sidelink slot set, and the transmitting terminal transmits at least a PSSCH in the slot and transmits at least a PSSCH 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 a slot immediately following the slot in the set of sidelink slots.

10. 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; performing a channel access process prior to transmitting the target physical 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 during a time period prior to a transmission time period in at least one of the N slots, the transmission time period indicating a time period of a first OFDM symbol for transmitting a target physical sidelink channel, the time period prior to the transmission time period being Y us, where Y≦25.

11. - randomly selecting one slot X from the set of sidelink slots within a time period or randomly selecting one slot X from a subset of slots belonging to the set of sidelink slots within a 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. and transmitting a target physical sidelink channel in consecutive OFDM symbols in one slot, specifically comprising: 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 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 symbols of duration t, and the second OFDM symbol is an OFDM symbol immediately preceding a first OFDM symbol in the first OFDM symbol series, where 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 period t1 in the second OFDM symbol; copying a sidelink channel or a sidelink signal having a duration of t1 in a second OFDM symbol in the first OFDM symbol to a leading time period 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 process 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 slot, and t is equal to the sum of t1 and t2.

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

16. the process of transmitting a target physical sidelink channel and a PSSCH, transmitting a PSSCH in each of N consecutive slots (N is 2 or more) in the 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 being 2 or more) not exceeding 25 us.

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 frequency domain resources used by the transmitting terminal to transmit the target physical sidelink channel are the same as 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 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; 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 a target physical channel after resource mapping occupies some resource elements in L orthogonal frequency division multiplexing OFDM symbols in one slot, where L is 2 or more, 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; a transmission module configured to transmit the target physical sidelink channel on L OFDM symbols in the one slot; A physical sidelink channel transmitting apparatus comprising:

19. A computer readable storage medium having stored thereon a computer program, the computer program being arranged, when executed, to perform the method 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 said computer program.

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