Control information transmission method and communication device

Abstract

An embodiment of the present application provides a control information transmission method, which includes: determining a frequency-domain location of a physical sidelink control channel (PSCCH) corresponding to a sidelink reference signal resource according to an index of the sidelink reference signal resource, and transmitting the PSCCH at the frequency-domain location.

Description

[Technical Field]

[0001] [Technical field] This application relates to the field of communications, and more specifically, to control information transmission methods and communication devices. [Background technology]

[0002] Currently, transmission between terminal devices is done via sidelinks. (S L) Sometimes called transmission. Currently, sidelink communication resources are scheduled in units of sub-channels and physical sidelink control channels. (P SCCH) frequency domain start (or lowest) resource block (R The index in B) is the physical sidelink shared channel (P It is the same as the one in the SSCH index.

[0003] In positioning scenarios, mutual resource multiplexing (e.g., time-division multiplexing, frequency-division multiplexing, or comb-division multiplexing) between different terminal devices should be considered to improve positioning performance and to occupy the system bandwidth as completely as possible. When multiple terminal devices transmit positioning reference signals in the same slot, if the index of the lowest frequency domain RB of the PSCCH is still the same as that of the PSCCH, the control information carried on the PSCCH of different terminal devices will compete with each other. Therefore, the control information carried on the PSCCH of different terminal devices competition between How to avoid this is an urgent problem that needs to be solved. [Overview of the project]

[0004] The embodiments of this application provide a control information transmission method for reducing the probability of conflicts between control information transmitted on the PSCCH of different terminal devices.

[0005] According to a first embodiment, a control information transmission method is provided. The method may be performed by a first terminal device, or by a component of the first terminal device (e.g., a chip or circuit). This is not limited to the present application. For the sake of clarity, an example in which the method is performed by a first terminal is used below for illustrative purposes.

[0006] The control information transmission method includes the following: A first terminal device determines the starting position of the frequency domain resources to be occupied by the control channel based on the number of reference signal resources to be set, the control channel is for carrying control information, and the set reference signal resources include multiple reference signal resources. The first terminal device transmits control information on the control channel based on the starting position of the frequency domain resources.

[0007] The first terminal device is capable of transmitting control information on a control channel to a second terminal device based on the starting position of a frequency domain resource. In this application, the second terminal device is a roadside unit or another device capable of implementing the function of receiving and demodulating the control information transmitted by the first terminal device in an SL scenario.

[0008] According to a second embodiment, a control information transmission method is provided. The method may be performed by a second terminal device, or by a component of the second terminal device (e.g., a chip or circuit). This is not limited to the present application. For the sake of clarity, an example in which the method is performed by a second terminal is used below for illustrative purposes.

[0009] The control information transmission method includes the following: A second terminal device determines the starting position of frequency domain resources to be occupied by a control channel based on the number of set reference signal resources, the control channel is for carrying control information, and the set reference signal resources include a plurality of reference signal resources. The second terminal device receives control information on the control channel based on the starting position of the frequency domain resources.

[0010] For example, the determination of the starting position of frequency domain resources occupied by a control channel by a terminal device (either a first or second terminal device) based on the amount of reference signal resources to be set may be understood as follows: the terminal device determines the starting position of frequency domain resources occupied by the control channel, and the starting position of frequency domain resources occupied by the control channel is related to the amount of reference signal resources to be set.

[0011] The number of reference signal resources to be set may be predetermined or set. The reference signal resources to be set may be reference signal resources set in one or more slots.

[0012] Specifically, each of the multiple reference signal resources is for transmitting multiple reference signals, and there is a one-to-one correspondence between the reference signal resources and the reference signal. For example, a first terminal device occupies one of the multiple reference signal resources to transmit a first reference signal, and the first reference signal is a reference signal among the multiple reference signals that should be transmitted by the first terminal device.

[0013] Based on the aforementioned technical solution, the first terminal device can determine the starting position of the frequency domain resources occupied by the control channel (e.g., PSCCH) based on the set quantity of reference signal resources. In other words, it is not required to refer to a configuration that multiplexes PSSCH and PSCCH (e.g., the starting position of PSCCH matches that of PSSCH) for the starting position of the frequency domain resources occupied by the control channel, and various determination methods exist. With respect to the positioning reference signal and control information, the starting position of PSCCH is determined by the sidelink positioning reference signal (S It is possible to have a mismatch with the starting position of L-PRS, improving the flexibility of PSCCH resource allocation, reducing contention and collisions between terminals, and thereby improving the probability of being able to use positioning.

[0014] In an implementation of the first or a part of the second embodiment, the starting position of one of several subbands of the bandwidth of the resource pool in which the configured reference signal resource is located is used as the starting position of the frequency domain resource, the number of subbands is related to the number of configured reference signal resources, and the starting position of a subband includes one of the following: starting resource block index, starting subchannel index, starting frequency index, or starting subcarrier index.

[0015] For example, in some implementations of the first or second embodiment, a terminal device (the first or second terminal device) determines the starting position of a frequency domain resource occupied by a control channel based on a set quantity of reference signal resources, by: the terminal device divides the bandwidth of the resource pool where the set reference signal resources are located into a plurality of subbands, the quantity of the plurality of subbands being related to the quantity of the set reference signal resources, the starting position of one of the plurality of subbands being the starting position of the first frequency domain resource, the resource pool being a resource pool containing the set reference signal resources, and the starting position of a subband including: a starting resource block index, a starting subchannel index, a starting frequency index, or a starting subcarrier index.

[0016] The quantity of multiple subbands may be related to the quantity of a set reference signal resource, meaning that the quantity of multiple subbands may be equal to the quantity of a set reference signal resource.

[0017] Furthermore, if the bandwidth of the resource pool where the configured reference signal resources are located is an integer multiple of the quantity of the configured reference signal resources, then the terminal device dividing the bandwidth of the resource pool where the configured reference signal resources are located into multiple subbands based on the quantity of the configured reference signal resources includes the terminal device equally dividing the bandwidth of the resource pool where the configured reference signal resources are located into multiple subbands based on the quantity of the configured reference signal resources.

[0018] Based on the foregoing technical solution, the terminal device may use the start position of one of the multiple sub-bands of the bandwidth of the resource pool where the set reference signal resource is located as the start position of the frequency domain resource. The probability that different terminal devices use the start position of the same sub-band as the start position of the frequency domain resource of the control channel corresponding to the terminal device is low. That is, the interference caused by different terminal devices transmitting control information on the control channel can be reduced.

[0019] In some implementations of the first aspect or the second aspect, the bandwidths of the multiple sub-bands are the same.

[0020] In some implementations of the first aspect or the second aspect, the quantity of the set reference signal resource, the start position of the frequency domain resource, and the index of the frequency domain resource satisfy the following relationship:

[0021]

Number

[0022]

Number

[0023] In an implementation of the first or a part of the second embodiment, the number of reference signal resources to be set, the starting position of the frequency domain resources, and the index of the frequency domain resources satisfy the following relationship:

[0024]

number

[0025]

number

[0026] In an implementation of the first or a part of the second embodiment, the number of reference signal resources to be set, the starting position of the frequency domain resources, and the index of the frequency domain resources satisfy the following relationship:

[0027]

number

[0028]

number

[0029] In this application, the location of the frequency domain resources of the PSCCH can be determined based on the PRS corresponding to the frequency domain resources of the PSCCH.

[0030] The above k prs is k sl-prs It may be replaced with, and in this application, f k f is an offset value, k The value of can be an integer. For example, f k is an integer greater than or equal to -1. For example, f k is -1 or 1. Also, in this application, N RB Total This may further indicate the total bandwidth occupied by multiple subbands, where the total bandwidth represents the bandwidth from the lowest frequency of the subband with the lowest frequency to the highest frequency of the subband with the highest frequency.

[0031] In some implementations of the first embodiment, the step of determining the starting position of the frequency domain resources occupied by the control channel based on the number of reference signal resources to be set is: The process includes determining the starting position of a frequency domain resource occupied by a control channel based on the number of reference signal resources to be set and a first index, wherein the first index is the index of the reference signal resources used by a first terminal device to transmit a reference signal; in other words, the first terminal device transmits a reference signal on the first reference signal resource corresponding to the first index; in other words, the first index is the index of the first reference signal resource, the first reference signal resource is for transmitting a reference signal, and the first reference signal resource is one of the reference signal resources to be set. In some implementations of the first embodiment, the first terminal device transmitting control information on the control channel based on the starting position of a frequency domain resource includes: the first terminal device transmitting control information on the control channel based on the starting position of a subband corresponding to the first index.

[0032] In some implementations of the second embodiment, the step of determining the starting position of the frequency domain resources occupied by the control channel based on the number of reference signal resources to be set is: The process includes determining the starting position of frequency domain resources occupied by a control channel based on the number of reference signal resources to be set and a first index, wherein the first index is the index of reference signal resources used by a second terminal device to receive a reference signal; in other words, the second terminal device receives a reference signal on the reference signal resource corresponding to the first index; in other words, the first index is the index of a first reference signal resource, the first reference signal resource is for receiving a reference signal, and the first reference signal resource is one of the reference signal resources to be set.

[0033] In some implementations of the second embodiment, the second terminal device receives control information on the control channel based on the starting position of the frequency domain resource: The second terminal device includes receiving control information on a control channel based on the start position of a subband corresponding to the first index.

[0034] Specifically, the first index is one of several indices, each corresponding to a different reference signal resource.

[0035] Based on the above technical solution, terminal devices determine the starting position of the frequency domain resource of the control channel based on the reference signal resource occupied by the terminal device, and different terminal devices occupy different reference signal resources. Therefore, the starting positions of the frequency domain resource of the control channel determined by different terminal devices will be different, and the bandwidth of the control channel determined by different terminal devices will not be greater than the bandwidth of the subband; in other words, the bandwidth of the control channel determined by different terminal devices will not be greater than the interval between the two starting positions. This can avoid conflicts caused by different terminal devices transmitting control information on the control channel.

[0036] In an implementation of the first or a part of the second embodiment, the index of each of the multiple reference signal resources is determined based on the identifier of the multiple reference signal resources, and the index of each of the multiple subbands is determined based on the frequency domain position corresponding to each of the multiple subbands.

[0037] For example, in some implementations of the first or second embodiment, a terminal device (the first or second terminal device) determines the index of each of the multiple reference signal resources based on the identifiers of the multiple reference signal resources, and determines the index of each of the multiple sub-bands based on the frequency domain position corresponding to each of the multiple sub-bands.

[0038] The identifier for a reference signal resource is for identifying that reference signal resource. The identifiers for multiple reference signal resources may be multiple different identifiers. The index for a reference signal resource may be understood as a re-encoding of multiple reference signal resources.

[0039] In some implementations of the first or second embodiment, when the minimum index value is 0, the number of reference signal resources to be set, the starting position of the frequency domain resource, and the index of the frequency domain resource satisfy the following relationship:

[0040]

number

[0041]

number

[0042]

number

[0043] In an implementation of the first or a part of the second embodiment, multiple reference signal resources are located in one slot; or, multiple reference signal resources are located in multiple slots, at least one of which contains multiple frequency domain resources, each corresponding to a multiple control channel.

[0044] Based on the aforementioned technical solutions, control channels in multiple slots can be designed together, thereby effectively reducing the resource overhead of the control channels. For example, if control channels in two slots are designed together, and each control channel occupies three symbols, the overhead is 3 / 14. When the two slots are encoded together, the PSCCH overhead becomes 3 / 28, reduced by half. Consequently, the utilization rate of reference signal resources and the capacity of the reference signal or terminal device are improved.

[0045] In the implementation of the first or a part of the second embodiment, multiple reference signal resources are each for transmitting multiple reference signals, and resource multiplexing is performed using the following multiplexing scheme: Frequency division multiplexing, time division multiplexing, or comb-tooth division multiplexing This is performed with respect to multiple reference signals in at least one of them.

[0046] A third aspect provides a method for transmitting control information. The method may be performed by a first terminal device or by a component of the first terminal device (e.g., a chip or circuit). This is not limited to the present application. For the sake of clarity, an example in which the method is performed by a first terminal is used below for illustrative purposes.

[0047] The control information transmission method includes the following: A first terminal device receives configuration information from a network device, which is used to configure a reference signal resource. Based on the configuration information, the terminal device determines the starting position of a frequency domain resource to be occupied by a control channel, which is used to carry the control information. Based on the starting position of the frequency domain resource, the first terminal device transmits the control information on the control channel.

[0048] Based on the aforementioned technical solution, the first terminal device can determine the starting position of the frequency domain resource occupied by the control channel based on the configuration information of the reference signal resource. Since the reference signal resources of different terminal devices typically have different configuration information, different terminal devices correspond to different starting positions of the frequency domain resource, and as a result, the probability of conflict caused by different terminal devices transmitting control information on the control channel can be reduced.

[0049] In some implementations of the third embodiment, the method further includes the step of dividing the bandwidth of a resource pool into several subbands based on the comb tooth size.

[0050] In some implementations of the third embodiment, the configuration information includes comb tooth size and frequency domain offset values ​​corresponding to a reference signal resource.

[0051] In some implementations of the third embodiment, the starting position of a first subband in multiple subbands of the bandwidth of the resource pool where the reference signal resource is located is used as the starting position of the frequency domain resource, the number of subbands is related to the comb size, the ranking of the first subband in multiple subbands is related to the frequency domain offset value, and the starting position of the subband includes one of the following: starting resource block index, starting subchannel index, starting frequency index, or starting subcarrier index. The frequency domain offset value may be understood as a resource element offset (RE offset) or a resource block offset (RB offset).

[0052] For example, in some implementations of the third embodiment, the first terminal determines the ranking of the first subbands corresponding to frequency domain resources within a plurality of subbands based on a frequency domain offset value, where the starting position of the first subband is the starting position of the frequency domain resource, and the starting position of the first subband includes one of the following: starting resource block index, starting subchannel index, starting frequency index, or starting subcarrier index. If the bandwidth of the resource pool in which the reference signal resource is located is an integer multiple of the comb size, the terminal device dividing the bandwidth of the resource pool in which the reference signal resource is located into a plurality of subbands based on the comb size includes the terminal device dividing the bandwidth of the resource pool in which the reference signal resource is located into a plurality of subbands equally based on the comb size.

[0053] Based on the aforementioned technical solution, the first terminal device determines the starting position of the frequency domain resource occupied by the control channel based on the comb tooth size and the frequency domain offset value of the reference signal resource. Different terminal devices typically occupy different comb teeth, i.e., different frequency domain offsets exist, so different terminal devices correspond to different starting positions of the frequency domain resource, and as a result, the probability of conflict caused by different terminal devices transmitting control information on the control channel can be reduced.

[0054] In some implementations of the third embodiment, the bandwidths of multiple sub-bands are the same.

[0055] In some implementations of the third embodiment, the comb tooth size, Frequency domain The offset value and the starting position of the frequency domain resource satisfy the following relationship:

[0056]

number

[0057]

number

[0058] According to a fourth aspect, a communication device is provided. The communication device includes a communication interface and a processor. The communication interface is configured to send and receive data and / or signaling. The processor is configured to execute computer programs or instructions to enable the communication device to perform a method according to any one of the first aspect and possible implementations of the first aspect, to enable the communication device to perform a method according to any one of the second aspect and possible implementations of the second aspect, or to enable the communication device to perform a method according to any one of the third aspect and possible implementations of the third aspect.

[0059] In some implementations of the fourth embodiment, the communication device further includes a memory configured to store computer programs or instructions.

[0060] According to a fifth aspect, a communication device is provided. The communication device can be configured to carry out the method of the first aspect. The communication device may be a first terminal device, or a device within the first terminal device (e.g., a chip, a chip system, or a circuit), or a device that can be used together with the first terminal device.

[0061] In possible implementations, the communication device may include a module or unit that corresponds one-to-one with the methods / operations / steps / actions described in the first embodiment. The module or unit may be hardware circuitry, software, or implemented by hardware circuitry in combination with software.

[0062] The communication device includes: a processing unit configured to determine the starting position of frequency domain resources occupied by a control channel based on the number of reference signal resources to be set, wherein the control channel is for carrying control information, and the reference signal resources to be set include a plurality of reference signal resources; and a transceiver unit configured to transmit control information on the control channel based on the starting position of the frequency domain resources.

[0063] It should be understood that the aforementioned transceiver unit may include a transmitting unit and a receiving unit. The transmitting unit is configured to perform the transmitting operation of the communication device, and the receiving unit is configured to perform the receiving operation of the communication device. For ease of explanation, in this embodiment of the present application, the transmitting unit and the receiving unit are incorporated into a single transceiver unit. This has been explained consistently in the present and will not be explained again in detail below.

[0064] According to the sixth aspect, a communication device is provided. The communication device can be configured to carry out the method of the second aspect. The communication device may be a second terminal device, or a device within the second terminal device (e.g., a chip, a chip system, or a circuit), or a device that can be used together with the second terminal device.

[0065] In possible implementations, the communication device may include a module or unit that corresponds one-to-one with the methods / operations / steps / actions described in the second aspect. The module or unit may be hardware circuitry, software, or implemented by hardware circuitry in combination with software.

[0066] The communication device includes: a processing unit configured to determine the starting position of frequency domain resources occupied by a control channel based on the number of reference signal resources to be set, wherein the control channel is for carrying control information and the reference signal resources to be set include a plurality of reference signal resources; and a transceiver unit configured to receive control information on the control channel based on the starting position of the frequency domain resources.

[0067] It should be understood that the aforementioned transceiver unit may include a transmitting unit and a receiving unit. The transmitting unit is configured to perform the transmitting operation of the communication device, and the receiving unit is configured to perform the receiving operation of the communication device. For ease of explanation, in this embodiment of the present application, the transmitting unit and the receiving unit are incorporated into a single transceiver unit. This has been explained consistently in the present and will not be explained again in detail below.

[0068] In implementations of the fifth or sixth embodiment, the starting position of one of several subbands of the bandwidth of the resource pool in which the reference signal resource is located is used as the starting position of the frequency domain resource, the number of subbands is related to the number of reference signal resources set, and the starting position of a subband includes one of the following: starting resource block index, starting subchannel index, starting frequency index, or starting subcarrier index.

[0069] For example, in some implementations of the fifth or sixth embodiment, the processing unit is configured to divide the bandwidth of the resource pool in which the reference signal resources are located into a plurality of subbands based on a set quantity of reference signal resources, the quantity of the plurality of subbands is related to the set quantity of reference signal resources, the starting position of one of the plurality of subbands is the starting position of a first frequency domain resource, the resource pool is a resource pool containing the set reference signal resources, and the starting position of a subband includes one of the following: starting resource block index, starting subchannel index, starting frequency index, or starting subcarrier index.

[0070] For example, in some implementations of the fifth or sixth embodiment, the bandwidths of multiple sub-bands are the same.

[0071] In implementations of the fifth or sixth aspect, the number of reference signal resources to be set, the starting position of the frequency domain resources, and the index of the frequency domain resources satisfy the following relationship:

[0072]

number

[0073]

number

[0074] In implementations of the fifth or sixth aspect, the number of reference signal resources to be set, the starting position of the frequency domain resources, and the index of the frequency domain resources satisfy the following relationship:

[0075]

number

[0076]

number

[0077] In implementations of the fifth or sixth aspect, the number of reference signal resources to be set, the starting position of the frequency domain resources, and the index of the frequency domain resources satisfy the following relationship:

[0078]

number

[0079]

Number

[0080] In some implementations of the fifth aspect, the processing unit determines the starting position of the frequency domain resources occupied by the control channel based on the quantity of reference signal resources to be set, which includes the processing unit determining the starting position of the frequency domain resources occupied by the control channel based on the quantity of reference signal resources to be set and a first index, wherein the first index is the reference signal sending It is the index of the reference signal resource used by the transceiver unit to transmit a reference signal; in other words, the transceiver unit is further configured to transmit a reference signal on the reference signal resource corresponding to the first index; in other words, the first index is the index of the first reference signal resource, the first reference signal resource is for transmitting a reference signal, and the first reference signal resource is one of the reference signal resources that are set.

[0081] In some implementations of the fifth aspect, the transceiver unit transmitting control information on a control channel based on the starting position of a frequency domain resource includes: the transceiver unit transmitting control information on a control channel based on the starting position of a subband corresponding to a first index.

[0082] In some implementations of the sixth aspect, the processing unit determining the starting position of frequency domain resources occupied by a control channel based on a set quantity of reference signal resources includes: the processing unit determining the starting position of frequency domain resources occupied by a control channel based on a set quantity of reference signal resources and a first index, where the first index is the index of a reference signal resource used by a transceiver unit to receive a reference signal; in other words, the transceiver unit is configured to receive a reference signal on the reference signal resource corresponding to the first index; in other words, the first index is the index of a first reference signal resource, the first reference signal resource is for receiving a reference signal, and the first reference signal resource is one of the set reference signal resources.

[0083] In some implementations of the sixth aspect, the transceiver unit transmitting control information on a control channel based on the starting position of a frequency domain resource includes the transceiver unit receiving control information on a control channel based on the starting position of a subband corresponding to a first index.

[0084] In implementations of the fifth or sixth embodiment, the index of each of the multiple reference signal resources is determined based on the identifier of the multiple reference signal resources, and the index of each of the multiple subbands is determined based on the frequency domain position corresponding to each of the multiple subbands.

[0085] For example, in some implementations of the fifth or sixth embodiment, the processing unit is further configured to: determine the index of each of the multiple reference signal resources based on the identifiers of the multiple reference signal resources; and determine the index of each of the multiple sub-bands based on the frequency domain position corresponding to each of the multiple sub-bands.

[0086] In some implementations of the fifth or sixth aspect, when the minimum value of the index is 0, the number of reference signal resources to be set, the start position of the frequency domain resources, and the index of the frequency domain resources satisfy the following relationship:

[0087]

Number

[0088]

Number

[0089]

Number

[0090] In some implementations of the fifth or sixth embodiment, multiple reference signal resources are located in a single slot; or, multiple reference signal resources are located in multiple slots, at least one of which contains multiple frequency domain resources, each corresponding to a multiple control channel.

[0091] In some implementations of the fifth or sixth aspect, multiple reference signal resources are each for transmitting multiple reference signals, and resource multiplexing is performed using the following multiplexing scheme: Frequency division multiplexing, time division multiplexing, or comb-tooth division multiplexing This is performed with respect to multiple reference signals in at least one of them.

[0092] For the technical effects of the methods shown in the fifth aspect and the possible designs of the fifth aspect, please refer to the technical effects in the first aspect and the possible designs of the first aspect.

[0093] For the technical effects of the methods shown in the sixth aspect and the possible designs of the sixth aspect, please refer to the technical effects in the second aspect and the possible designs of the second aspect.

[0094] According to the seventh aspect, a communication device is provided. The communication device can be configured to carry out the method of the third aspect. The communication device may be a first terminal device, or a device within the first terminal device (e.g., a chip, a chip system, or a circuit), or a device that can be used together with the first terminal device.

[0095] In possible implementations, the communication device may include a module or unit that corresponds one-to-one with the methods / operations / steps / actions described in the third aspect. The module or unit may be hardware circuitry, software, or implemented by hardware circuitry in combination with software.

[0096] The communication device includes: a transceiver unit configured to receive configuration information from a network device, the configuration information being for setting up reference signal resources; and a processing unit configured to determine the starting position of frequency domain resources occupied by a control channel based on the configuration information, the control channel being for carrying control information, the control information indicating information related to a reference signal.

[0097] It should be understood that the aforementioned transceiver unit may include a transmitting unit and a receiving unit. The transmitting unit is configured to perform the transmitting operation of the communication device, and the receiving unit is configured to perform the receiving operation of the communication device. For ease of explanation, in this embodiment of the present application, the transmitting unit and the receiving unit are incorporated into a single transceiver unit. This has been explained consistently in the present and will not be explained again in detail below.

[0098] In some implementations of the seventh embodiment, the transceiver unit is further configured to transmit control information on the control channel based on the starting position of the frequency domain resource.

[0099] In some implementations of the seventh aspect, the configuration information includes comb tooth size and frequency domain offset values ​​corresponding to a reference signal resource.

[0100] In some implementations of the seventh aspect, the method further includes the step of dividing the bandwidth of a resource pool into multiple subbands based on the comb tooth size.

[0101] In some implementations of the seventh aspect, the starting position of a first subband in multiple subbands of the bandwidth of the resource pool where the reference signal resource to be set is located is used as the starting position of the frequency domain resource, the number of subbands is related to the comb size, the ranking of the first subband in multiple subbands is related to the frequency domain offset value, and the starting position of the subband includes one of the following: starting resource block index, starting subchannel index, starting frequency index, or starting subcarrier index. The frequency domain offset value may be understood as RE offset or RB offset.

[0102] For example, in some implementations of the seventh embodiment, the processing unit is further configured to determine the ranking of a first subband corresponding to a frequency domain resource within a plurality of subbands based on a frequency domain offset value, where the starting position of the first subband is the starting position of the frequency domain resource, and the starting position of the first subband includes one of the following: starting resource block index, starting subchannel index, starting frequency index, or starting subcarrier index.

[0103] If the bandwidth of the resource pool in which the reference signal resource is located is an integer multiple of the comb size, then the processing unit dividing the bandwidth of the resource pool in which the reference signal resource is located into multiple subbands based on the comb size includes: the processing unit dividing the bandwidth of the resource pool in which the reference signal resource is located into multiple subbands equally based on the comb size.

[0104] In some implementations of the seventh embodiment, the bandwidths of multiple sub-bands are the same.

[0105] In some implementations of the seventh aspect, the comb tooth size, Frequency domain The offset value and the starting position of the frequency domain resource satisfy the following relationship:

[0106]

number

[0107]

number

[0108] For the technical effects of the methods shown in the seventh aspect and the possible designs of the seventh aspect, please refer to the technical effects in the third aspect and the possible designs of the third aspect.

[0109] According to the ninth aspect, a communication system is provided. The communication system includes a first terminal device and a second terminal device. The first terminal device is configured to perform a method according to the first aspect and any one of possible implementations thereof. The second terminal device is configured to perform a method according to the second aspect and any one of possible implementations thereof.

[0110] According to the ninth aspect, a communication system is provided. The communication system includes a first terminal device and a network device. The first terminal device is configured to perform a method according to the third aspect and any one of the possible implementations of the third aspect.

[0111] According to the tenth aspect, a computer-readable storage medium is provided. The computer-readable storage medium includes a computer program or instruction. When the computer program or instruction is executed on a computer, a method according to any one of the first aspect and a possible implementation of the first aspect is performed, a method according to any one of the second aspect and a possible implementation of the second aspect is performed, or a method according to any one of the third aspect and a possible implementation of the third aspect is performed.

[0112] According to the eleventh aspect, a computer program product is provided. The computer program product includes instructions. When the instructions are executed on a computer, a method according to any one of the first aspect and possible implementations thereof is executed, a method according to any one of the second aspect and possible implementations thereof is executed, or a method according to any one of the third aspect and possible implementations thereof is executed.

[0113] According to a twelfth aspect, a communication device is provided. The communication device includes a logic circuit and an input / output interface. The input / output interface is configured to output and / or input signals. The logic circuit is configured to perform a method according to any one of the first aspect and a possible implementation of the first aspect, a method according to any one of the second aspect and a possible implementation of the second aspect, or a method according to any one of the third aspect and a possible implementation of the third aspect. [Brief explanation of the drawing]

[0114] [Figure 1] Figure 1 is a diagram illustrating a communication scenario to which the technical solution of this application can be applied. [Figure 2] Figure 2 shows a diagram of multiple resource pools. [Figure 3] Figure 3 shows the transmission structure of PSCCH and PSSCH in New Radio (NR). [Figure 4] Figure 4 shows that the frequency domain start RB is the same for PSCCH and PSSCH. [Figure 5] Figure 5 shows the frequency division multiplexing for different users according to the present application. [Figure 6] Figure 6 shows PSCCH collisions between different users. [Figure 7] Figures 7(a) through 7(c) are diagrams of the SL positioning scenarios according to the present application. [Figure 8] Figure 8 is a schematic flowchart of the control information transmission method according to the embodiment of the present application. [Figure 9] Figure 9 shows a configuration in which multiple SL-PRS resources are located within a single slot. [Figure 10] Figures 10(a) and 10(b) show the frequency domain start positions of different PSCCHs according to embodiments of the present application. [Figure 11] Figure 11 shows that different SL-PRS resources correspond to different candidate resource locations in PSCCH. [Figure 12]Figure 12 shows a configuration in which multiple SL-PRS resources are located in multiple slots. [Figure 13] Figure 13 shows different SL-PRS resource multiplexing schemes. [Figure 14] Figure 14 is a schematic flowchart of another control information transmission method according to an embodiment of the present application. [Figure 15] Figure 15 is a block diagram of the communication device 10 according to the embodiment of the present application. [Figure 16] Figure 16 is a diagram of another communication device 20 according to the embodiment of the present application. [Figure 17] Figure 17 is a diagram of the chip system 30 according to an embodiment of the present application. [Modes for carrying out the invention]

[0115] The technical solution of this application will be described below with reference to the attached drawings.

[0116] The technical solution in the embodiments of this application is applicable to various communication systems, such as fifth-generation (5 G) System or NR System, Wireless Fidelity (W i-Fi) System, 3rd Generation Partnership Project (3 This is applicable to cellular systems related to GPP (Global Power Platform), communication systems supporting the convergence of multiple wireless technologies, and future-oriented, evolving systems, among others. However, it is not limited to these applications.

[0117] With the advancement of communication technology, mobile communication systems not only support conventional communication but also, for example, device-to-device communication. (D 2D) Communication, Machine-to-Machine (M 2M) Communication, Machine-Type Communication (M TC), and Vehicle-to-Everything (V 2X) Communication (also called vehicle-to-vehicle internet communication), for example, vehicle-to-vehicle (V 2V) Faith, Vehicle-to-Infrastructure (V2I) Faith, Vehicle vs. Pedestrian (V 2P) Faith, and vehicle-to-network (V 2N) Shin I will support you.

[0118] Figure 1 is a diagram of the architecture of a communication system to which the embodiments of this application can be applied.

[0119] The communication system to which this embodiment of the present application is applicable mainly includes terminal devices, for example, terminal devices 121 and 122 shown in Figure 1, and a network device, for example, network device 110 shown in Figure 1. Furthermore, the communication system mainly includes two communication interfaces, for example, a communication interface (Uu interface) between terminal device 121 and network device 110, and a communication interface (proximity-based service communication 5) between terminal device 121 and terminal device 122. (P The PC5 interface includes the Uu interface, which is for communication between terminal devices and network devices, and the PC5 interface, which is for sidelink communication between terminal devices. The link used by a terminal device to send data to a network device on the Uu interface is called an uplink, and the link used by a terminal device to receive data sent by a network device is called a downlink. The link for data transmission between terminal devices on the PC5 interface is called a sidelink or direct link. Sidelinks are generally used between devices, for example, device-to-device. (D Used in scenarios where direct communication is possible (2D). In this scenario, data transmission between devices does not need to be performed via a network device. (V 2X) communication can be considered as one case of D2D communication.

[0120] In the Uu interface, data and radio resource control (R One or more of the RC signaling signals are transmitted between the terminal device and the network device via a wireless bearer. The wireless bearer used for data transmission is the data wireless bearer. (D Bearers used for RRC signaling transmission are called RBs, and are signaling radio bearers. (S It is called RB. A wireless bearer is a packet data convergence protocol. (P DCP (DCP) Entity and Wireless Link Control (R RLC bearers include RLC entities and their corresponding logical channels. (L The configuration of the wireless bearer includes the configuration of the wireless bearer's PDCP entity, RLC entity, and logical channel. The configuration of the wireless bearer is the quality of service of the service transmitted through the wireless bearer. (Q The OS requirements must be met. Regarding the UU interface, the wireless bearer is configured by the network device for the terminal device.

[0121] With respect to the PC5 interface, one or more of the data and RRC signaling are transmitted between terminal devices via a wireless bearer. The wireless bearer in the PC5 interface is a sidelink wireless bearer. (S It is sometimes called LRB. Long-Term Evolution (L In the TE)V2X system, the wireless bearer on the PC5 interface is established by the transmitting terminal device and the receiving terminal device, respectively, and the configuration of the wireless bearer is either predefined by the standard or determined by the transmitting terminal device and the receiving terminal device.

[0122] In future communications, interface names such as Uu interface or PC5 interface may remain unchanged or may be replaced by other names. This is not limited to the present application.

[0123] In the embodiments of this application, the terminal device may be briefly referred to as a terminal. The terminal device may be a device having wireless transceiver functionality. The terminal device may be mobile or fixed. The terminal device may be deployed on land, including indoor or outdoor, handheld or vehicle-mounted configurations, on water (e.g., on a ship), or in the air (e.g., on an aircraft, balloon, or satellite). The terminal device may be a mobile phone, a tablet computer, a computer with wireless transceiver functionality, or a virtual reality device. (V R) Terminal devices, augmented reality (A R) Terminal devices may include wireless terminal devices in industrial control, wireless terminal devices in self-driving, wireless terminal devices in remote medical, wireless terminal devices in smart grids, wireless terminal devices in transportation safety, wireless terminal devices in smart cities, and / or wireless terminal devices in smart homes. Alternatively, terminal devices may include cellular phones, cordless phones, session initiation protocols. (S IP) phone, wireless local loop (W LL) Station, Personal Digital Assistant (P DA), handheld devices or computing devices with wireless communication capabilities, in-vehicle devices, wearable devices, 5th generation (5 G) Terminal devices in a network, or more advanced public land mobility networks (PThis may also be a terminal device in LMN. A terminal device is a user device. (U It may also be called E). Optionally, the terminal device can communicate with multiple access network devices by using different technologies. For example, the terminal device may communicate with an access network device that supports LTE, or with an access network device that supports 5G, or it may be dual-connected to an access network device that supports LTE and an access network device that supports 5G. This is not limited to the present application.

[0124] In this application, the device configured to perform the functions of a terminal device may be a terminal device, or a device capable of supporting the terminal device in performing its functions, such as a chip system, hardware circuitry, software module, or a combination of hardware circuitry and software module. The device may be installed in the terminal device or used together with the terminal device. In the technical solution provided in this application, an example in which the device configured to perform the functions of a terminal device is a terminal device and the terminal device is a UE is used to illustrate the technical solution provided in this application.

[0125] In this application, the chip system may include a chip, or it may include a chip and other discrete components.

[0126] The network device in this embodiment of the present application is an access network (R It may also be called an AN device.

[0127] A RAN device is a node or device that connects terminal devices to a wireless network, and is sometimes called a base station. Examples of RAN devices include base stations and next-generation nodes in 5G.(g NB), Evolved Node B (e NB), Wireless Network Controller (R NC), Node B (N B) Base station controller (B SC), Base Transceiver Station (B TS), home base station (for example) 、H NB), Bassband Unit (B BU), Send / Receive Point (T This includes, but is not limited to, RPs, transmission points (TPs), and / or mobile switching centers. Alternatively, access network devices are central units. (C U), distributed unit (D U), Central Unit Control Plane (C U-CP) Node, Central Unit User Plane (C U-UP) Nodes, Integrated Access, and Backhaul (I AB) Node, Cloud Wireless Access Network (C The access network device may be at least one of the following: a wireless controller in a RAN (Range-Aided Network) scenario, or similar. Alternatively, the access network device may be a relay station, access point, in-vehicle device, terminal device, wearable device, access network device in a 5G network, or future evolved public land mobile network. (P This may be an access network device in LMN, or something similar.

[0128] In this application, the device configured to implement the functions of an access network device may be an access network device, or a device capable of supporting an access network device in implementing its functions, such as a chip system, hardware circuitry, software module, or a combination of hardware circuitry and software module. The device may be attached to the access network device or used together with the access network device. In the technical solutions provided in this application, an example in which the device configured to implement the functions of an access network device is an access network device, and the access network device is a base station, is used to illustrate the technical solutions provided in this application.

[0129] The architecture shown in Figure 1 to which the embodiments of this application are applicable is merely an illustrative example, and the architecture to which the embodiments of this application are applicable is not limited thereto. Any architecture capable of realizing the functions of the aforementioned device is applicable to the embodiments of this application.

[0130] Furthermore, it should be understood that the aforementioned names are defined merely to distinguish different functions and do not constitute any limitation to the present application. The present application does not rule out the possibility that different names may be used in 5G networks and other future networks. For example, in a 6G network, all or some of the aforementioned devices may use the terminology used in 5G, or other names or similar names may be used. The names of the device-to-device interfaces in Figure 1 are merely examples. In a particular implementation, the interface names may be other names. This is not particularly limited in the present application. Furthermore, the names of the messages (or signaling) transmitted between the aforementioned devices are merely examples and do not constitute any limitation to the function of the messages.

[0131] To facilitate understanding of the embodiments of this application, the basic concepts of this application will first be explained below.

[0132] 1. Resource Pool: Terminal devices can perform data transmission by using resources within a sidelink resource pool. One resource pool consists of one or more contiguous physical resource blocks. (P RB) (Resource Block) (R A (also called B) may be set in the frequency domain, and one or more slots may be set in the time domain. The multiple slots may be continuous or discontinuous.

[0133] To facilitate understanding of the meaning of resource pools, sidelink resource pools are explained below using an example related to Figure 2. Figure 2 is a diagram of multiple resource pools. The portion of the carrier bandwidth used for SL is the sidelink bandwidth portion. (S L BWP ) It may also be called a PRB. Multiple resource pools, for example, the three resource pools shown in Figure 2 (resource pool #1, resource pool #2, resource pool #3), may be defined in the SL BWP. One of the resource pools is used as an example for explanation. Multiple consecutive PRBs may be set up for one resource pool in the frequency domain, and a certain number of consecutive PRBs may form one subchannel, and a terminal device may perform SL data transmission by using one or more subchannels. In other words, the smallest unit granularity for sending or receiving SL data by a terminal device may be called a subchannel, and the number of PRBs in one subchannel may be 10, 12, 15, 20, 25, 50, 75, or 100.

[0134] 2. Resources: Resources are time-frequency resources within a resource pool. Time-domain resources may be represented by symbols, slots, mini-slots, partial slots, sub-frames, frames, sensing slots, or similar entities. Frequency-domain resources are resource elements (REs), resource blocks. (R B) Sub-channel, resource pool, bandwidth, bandwidth portion (B It may be referred to as WP, carrier, channel, interlace, or similar.

[0135] For the sake of clarity, in this specification, examples in which time-domain resources are slots and frequency-domain resources are RBs or sub-channels are used to illustrate resources for PSCCH transmission.

[0136] 3. PSCCH and PSSCH: According to the Rel-16 / Rel-17 NR protocol, the scheduling granularity of PSCCH and / or PSSCH is a unit of one slot in the time domain and a unit of one or more consecutive sub-channels in the frequency domain.

[0137] The UE can transmit sidelink information on a resource, and one resource can transmit PSCCH, PSSCH, and signals, such as demodulated reference signals. (D MRS) and channel status information reference signal (C It is possible to transport SI-RS. PSCCH is the first stage side link control information (S The CI is transported, and the PSSCH transports the second stage SCI and / or data.

[0138] (1) Transmission structure of PSCCH: PSCCH carries the first stage SCI. In the time domain, PSCCH uses two or three orthogonal frequency division multiplexing starting from the second sidelink symbol. (O Occupy the FDM symbol. In the frequency domain, the physical resource block that carries the PSCCH. (P The RB) starts from the lowest PRB of the lowest subchannel of the associated PSSCH, and the number of PRBs occupied by the PSSCH is within the subband range of one PSSCH. The PSCCH has {10, 12, 15, 20, 25} resource blocks. (R This includes (B). The specific values ​​are those pre-configured or set by the network device. This is not limited to the present application.

[0139] (2) Transmission structure of PSSCH: PSSCH carries the second stage SCI and data. In the time domain, a minimum of 2 symbols and a maximum of 12 symbols are used to carry PSSCH. In the frequency domain, PSSCH is L subCh It occupies several consecutive sub-channels. Also, in the slot, the information transmitted on the second symbol is automatically gain controlled. (A It is copied to the first OFDM symbol for garbage collection (GC).

[0140] Furthermore, the UE may receive and transmit PSSCH in two consecutive slots, respectively. Therefore, it may be necessary to add an additional symbol (GAP symbol) after the PSSCH for the UE's transmit / receive conversion.

[0141] Figure 3 shows the transmission structure of PSCCH and PSSCH in NR. PSCCH and PSSCH can be carried in one slot and three sub-channels, where one slot contains 14 symbols.

[0142] Furthermore, Figure 4 shows that the index of the frequency domain start RB (or minimum RB) for PSCCH is the same as that of PSSCH.

[0143] When different users occupy different sub-channels, the PSCCHs of the different users do not conflict with each other. Figure 5 is a diagram of frequency division multiplexing for different users according to the present application.

[0144] Figure 5 shows that UE#1 occupies sub-channels #6 and #5, and UE#2 occupies sub-channels #2 and #1.

[0145] 4. PSCCH conflicts between different users: In some specific scenarios (e.g., positioning scenarios), different users need to multiplex resources in a time-frequency orthogonal or comb-like splitting format to completely occupy the system bandwidth. For example, the bandwidth of the resource pool or BWP bandwidth may be completely occupied.

[0146] In this case, if the design concepts of PSCCH and PSSCH are used as a basis, for example, if the lowest RB index of PSCCH is the same as that of SL-PRS, then when multiple users transmit SL-PRS in the same slot, different users' PSCCHs will compete with each other. As a result, SCI cannot be demodulated correctly, the SL-PRS reference signal cannot be received correctly, and other users cannot sense resource reservation information.

[0147] To facilitate understanding, PSCCH conflicts between different users will be briefly explained with reference to Figure 6.

[0148] UE#1 and UE#2 are transmitting SL-PRS (e.g., SL-PRS#1 and SL-PRS#2 shown in FIG. 6) in a time-frequency multiplexing manner, and it can be seen from FIG. 6 that PSCCH (e.g., PSCCH#1 and PSCCH#2 shown in FIG. 6) between UE#1 and UE#2 collides with each other.

[0149] Embodiments of this application are related to the SL positioning scenario. For example, there are three different architectures for sidelink positioning. For ease of understanding, it will be described with reference to FIG. 7. FIGS. 7(a) to 7(c) are diagrams of the SL positioning scenario according to this application.

[0150] FIG. 7(a) shows that two user devices are performing mutual positioning, such as ranging or angle measurement, by transmitting sidelink positioning reference signals in a scenario without considering network coverage.

[0151] FIG. 7(b) shows that one sidelink user is performing sidelink positioning by receiving sidelink positioning reference signals transmitted by a plurality of roadside units (R (SU).

[0152] FIG. 7(c) shows that two sidelink users within the network coverage area are performing mutual ranging or angle measurement by transmitting sidelink positioning reference signals under the control of the base station, and transmitting the measurement results to the positioning center of the core network via the base station. The positioning center of the core network may be a location management function (L (MF) network element.

[0153] For ease of understanding of the embodiments of this application, the following description will be given.

[0154] First, in this application, the term "indicate" may include both direct and indirect indications. If some indicating information indicates A, the indicating information may directly or indirectly indicate A, but it does not explicitly indicate that the indicating information carries A.

[0155] Information indicated by an indicator is referred to as to-be-indicated information. In a specific implementation process, there are multiple ways to indicate to-be-indicated information, for example, the following: the to-be-indicated information is directly indicated, for example, by an index of the to-be-indicated information or the to-be-indicated information itself. Alternatively, the to-be-indicated information may be indirectly indicated by indicating other information, where there is a relationship between the other information and the to-be-indicated information. Alternatively, only a portion of the to-be-indicated information may be indicated, where the other parts are known or pre-agreed. For example, certain information can be indicated by using a pre-agreed (e.g., specified in a protocol) sequence of multiple pieces of information, thereby reducing the indication overhead to some extent. Furthermore, the common parts of all information can be identified and indicated in a unified manner, reducing the indication overhead caused by indicating the same information separately.

[0156] Secondly, “at least one” as used in this application means one or more, and “multiple” means two or more. Furthermore, in the embodiments of this application, “first,” “second,” and various numbers (e.g., “#1” and “#2”) are used merely for distinction to facilitate explanation and are not used to limit the scope of the embodiments of this application. The sequence numbers of the following processes do not indicate the order of execution. The order of execution of processes should be determined based on the function and internal logic of the processes and should not be interpreted as any limitation to the implementation process of the embodiments of this application. It should be understood that the subject matter described in this manner is interchangeable where appropriate to describe solutions other than the embodiments of this application. Also, in the embodiments of this application, words such as “S810” and “S820” are merely identifiers for facilitating explanation and do not limit the order in which the steps are performed.

[0157] Thirdly, in the embodiments of this application, terms such as “example” or “for example” are used to give examples, illustrations, or explanations. Any embodiment or design described as “example” or “for example” in this application should not be described as being preferable or having more advantages than another embodiment or design. More precisely, the use of terms such as “example” or “for example” is intended to present relative concepts in a particular manner.

[0158] Fourth, “storage” in the embodiments of the present application may mean storage in one or more memories. One or more memories may be separately located or may be integrated into an encoder, decoder, processor, or communication device. Alternatively, some of the one or more memories may be separately located, and some may be integrated into a decoder, processor, or communication device. The type of memory may be any form of storage medium; this is not limited to the present application.

[0159] Fifth, the “protocol” in the embodiments of this application may be a standard protocol in the field of communications, and may include, for example, the NR protocol and related protocols applicable to future communications systems. This is not limited to the present application.

[0160] Sixth, in the embodiments of this application, “of,” “corresponding, relevant,” “corresponding,” and “associate” are often used interchangeably. It should be noted that, unless the differences between the terms are emphasized, the meanings expressed are consistent.

[0161] Seventh, in this specification, the terms "and / or" are used merely to describe the relationship between the related subjects, and three relationships may exist. For example, A and / or B indicates the following three cases: only A exists, both A and B exist, and only B exists. Furthermore, the letter " / " in this specification usually indicates an "or" relationship between the related subjects.

[0162] Eighth, in the method flowchart in the attached drawings of this application, the dashed boxes indicate optional steps.

[0163] As can be seen from the above, in a scenario where multiple users transmit SL-PRS using time-frequency multiplexing, conflicts occur between different users' PSCCHs. This application provides a control information transmission method to avoid PSCCH conflicts between different users. The control information transmission method will be described later.

[0164] It should be understood that the control information transmission method provided in the embodiments of this application may be applied to a system for SL communication, for example, the communication system shown in Figure 1.

[0165] It should be further understood that the specific structure of the execution entity of the method provided in the embodiments of this application is not particularly limited in the embodiments, provided that it is possible to perform communication in accordance with the method provided in the embodiments of this application by executing a program that records the code of the method provided in the embodiments of this application. For example, the execution entity of the method provided in the embodiments of this application may be a terminal device, or a functional module that can invoke and execute a program on a terminal device.

[0166] The control information transmission method provided in the embodiments of this application will be described below using an example in which a terminal device selects a resource.

[0167] Figure 8 is a schematic flowchart of the control information transmission method according to the embodiment of this application. This method includes the following steps. S810: The first terminal device determines the starting position of the frequency domain resources to be occupied by the control channel, based on the amount of reference signal resources to be set.

[0168] A configured reference signal resource includes multiple reference signal resources. These multiple reference signal resources are used to transmit multiple reference signals, and each reference signal has a one-to-one correspondence with a reference signal resource.

[0169] Specifically, the reference signal resource set in this embodiment SIt may be understood as a pre-set or set resource for transmitting a reference signal. The set reference signal resource may be understood as the associated parameters set for reference signal transmission. The specific form of the set reference signal resource is not limited in this embodiment and may be a configuration related to the reference signal resource and defined in the current protocol. This embodiment is mainly related to the quantity of the set reference signal resource, and the specific set content is not limited.

[0170] For example, the set reference signal resource may be a resource pre-set by a network device for transmitting a reference signal. For example, the network device pre-sets four reference signal resources, and the four reference signal resources are respectively for transmitting four reference signals.

[0171] In another example, the set reference signal may be set by the network device in real time. For example, the network device sets four reference signal resources based on the communication state of the terminal device in the current system, and the four reference signal resources are respectively for transmitting four reference signals.

[0172] The control channel is for carrying control information, and the control information indicates information related to the first reference signal. For example, the control information indicates time domain resource information, frequency domain resource information, the number of occupied symbols, or sequence identifier (I information such as D). The first reference signal is a reference signal transmitted by a reference signal resource within a plurality of reference signal resources occupied by the first terminal device. In other words, the first reference signal is a reference signal among a plurality of reference signals and is transmitted by the first terminal device.

[0173] For example, the control information is the aforementioned SCI or sidelink positioning control information (SIt may be PCI. The specific format of the control information is not limited to this embodiment, and the control information may be control information carried on a control channel as defined in the current protocol.

[0174] This embodiment primarily relates to the problem that, in a scenario where multiple terminals each transmit multiple reference signals in a resource multiplexing scheme, conflicts may arise between control information transmitted by different terminal devices on different control channels. The configured reference signal resource includes multiple reference signal resources, which are each used by multiple terminal devices to transmit reference signals. The multiple terminal devices each transmit control information on multiple control channels. The aforementioned first terminal device is one of the multiple terminal devices, the aforementioned control channel is a control channel among the multiple control channels and corresponds to the first terminal device, and the aforementioned first reference signal is a reference signal among the multiple reference signals and is transmitted by the first terminal.

[0175] For example, the reference signal in this embodiment may be a positioning reference signal (e.g., SL-PRS) transmitted in time-frequency orthogonal format or comb-type format, or another reference signal. The specific type of reference signal is not limited in this embodiment. For the sake of clarity, an example in which the reference signal is SL-PRS will be used below for illustrative purposes.

[0176] For example, the control channel in this embodiment may be the aforementioned PSCCH or another channel that carries control information. The name of the control channel is not limited in this embodiment. For the sake of clarity, an example in which the control channel is PSCCH will be used below.

[0177] In a possible implementation, the first terminal device determining the starting position of the frequency domain resources occupied by the control channel, based on the quantity of reference signal resources to be set, includes the following: The first terminal device divides the resource pool bandwidth into multiple subbands based on the set number of reference signal resources. The number of multiple subbands is set reference signal This relates to the quantity of resources. The starting position of one of several subbands is the starting position of a frequency domain resource, and the starting position of a subband may be represented by a starting resource block, or, if the concept of subchannels exists in the system, the starting position of a subband may be represented by a starting subchannel.

[0178] In other words, The starting position of one of several subbands of the bandwidth of the resource pool where the reference signal resource to be configured is located is used as the starting position of the frequency domain resource, and the number of subbands is related to the number of reference signal resources to be configured. Optionally, the bandwidths of the subbands are the same.

[0179] In another possible implementation, the first terminal device may directly determine the starting position of the frequency domain resources occupied by the control channel based on the set quantity of reference signal resources. For example, a correspondence between the quantity of reference signal resources and the starting position of the frequency domain resources occupied by the control channel may be pre-configured.

[0180] In yet another possible implementation, the first terminal device has another device determine the starting position of the frequency domain resources occupied by the control channel, based on the quantity of reference signal resources to be set. For example, the first terminal device reports the quantity of reference signal resources to a management device, the management device determines the starting position of the frequency domain resources occupied by the control channel, and notifies the first terminal device of the starting position of the frequency domain resources.

[0181] It should be understood that the aforementioned implementations are merely examples illustrating a method for determining the starting position of frequency domain resources occupied by a control channel based on the quantity of reference signal resources to be set, and do not constitute any limitation on the scope of protection of this application. Other methods for determining the starting position of frequency domain resources occupied by a control channel based on the quantity of reference signal resources to be set also fall within the scope of protection of this application. Specific examples will not be described one by one here.

[0182] For the sake of clarity, the following example illustrates how a first terminal device determines multiple subbands based on the quantity of reference signal resources to be configured, and uses the starting position of one of these subbands in the bandwidth of the resource pool where the configured reference signal resources are located as the starting position for the frequency domain resources.

[0183] For example, multiple sub-bands may be understood as candidate resource locations for the control channel.

[0184] For example, if the number of reference signal resources to be configured is 4, the bandwidth of the resource pool is divided into 4 subbands.

[0185] Furthermore, if the bandwidth of the resource pool where the configured reference signal resources are located is an integer multiple of the quantity of the configured reference signal resources, the first terminal device dividing the bandwidth of the resource pool where the configured reference signal resources are located into multiple subbands based on the quantity of the configured reference signal resources includes the first terminal device equally dividing the bandwidth of the resource pool where the configured reference signal resources are located into multiple subbands based on the quantity of the configured reference signal resources.

[0186] For example, if the number of reference signal resources to be configured is 4, and the bandwidth of the resource pool where the configured reference signal resources are located is 20 M, then the first terminal device can equally divide the 20 M bandwidth into four subbands, with each subband occupying a bandwidth of 5 M.

[0187] In another example, the number of reference signal resources to be configured is 4, and the bandwidth of the resource pool where the configured reference signal resources are located is 20 M, defining the concept of subchannels. For example, the 20 M bandwidth includes 4 subchannels, each subchannel occupying a bandwidth of 5 M. In this case, the first terminal device can equally divide the 20 M bandwidth into 4 subbands, each subband occupying a bandwidth of 5 M, or each subband occupies one subchannel.

[0188] Furthermore, if the bandwidth of the resource pool where the configured reference signal resources are located is not an integer multiple of the quantity of configured reference signal resources, the first terminal device will, based on the quantity of configured reference signal resources, divide the bandwidth of the resource pool where the configured reference signal resources are located into multiple subbands, and the bandwidths of the different subbands may differ.

[0189] For example, if the number of reference signal resources to be configured is 4, and the bandwidth of the resource pool where the configured reference signal resources are located is 21 M, then the first terminal device will 21 The bandwidth of M can be divided into four subbands, with three of these subbands having a bandwidth of 5 M and the other subband having a bandwidth of 6 M.

[0190] In this embodiment, it should be noted that the quantities of the subbands are related to the quantity of the reference signal resources being set. This can be understood as the quantities of the subbands being equal to the quantity of the reference signal resources being set, or the quantities of the subbands being calculated based on the quantity of the reference signal resources being set.

[0191] For example, the number of reference signal resources to be set is 4, and the number of subbands may be 4, 5, or another value. That is, for the number of subbands, refer to the number of reference signal resources to be set.

[0192] It should be understood that the aforementioned method of partitioning the bandwidth of a resource pool is merely an example and does not constitute any limitation to the scope of protection of this application. Further details are not provided here.

[0193] Specifically, the resource pool in this embodiment may be understood as follows: at least one resource pool is configured in the sidelink communication system, and each resource pool includes a segment of frequency resources and a group of time resources, e.g., a group of slot units. The frequency domain resources and time resources available in the resource pool may be specified by using signaling. Resource scheduling in the sidelink communication system is performed based on the resource pool. Specifically, the user can only schedule, specify, or reserve resources within the resource pool, e.g., time resources, frequency resources, or positioning reference signal resources. A reference signal resource is a time-frequency resource for transmitting a reference signal, specified by using the configuration information of the reference signal.

[0194] For example, resource pool bandwidth could alternatively be bandwidth occupied by SL-PRS, or SL-PRS resource pool bandwidth, or BWP bandwidth, or component carrier bandwidth. (C C) May be understood as bandwidth. CC bandwidth indicates that the signal is set on CC and is independent of BWP or BWP bandwidth.

[0195] For ease of understanding, a specific implementation in which the first terminal device determines the starting position of the frequency domain resources occupied by the control channel in this implementation is described below with reference to specific examples (e.g., Specific Examples 1 to 3). Further details are not provided here.

[0196] Specifically, after determining the starting position of the frequency domain resource occupied by the control channel, the first terminal device can transmit control information on the control channel based on the starting position of the frequency domain resource. The method procedure shown in Figure 8 includes the following steps: S820: The first terminal device transmits control information to the second terminal device on the control channel based on the starting position of the frequency domain resource.

[0197] In this embodiment, the specific transmission method for transmitting control information on the PSCCH is not limited. After the starting position of the frequency domain resources occupied by the PSCCH is determined, the frequency domain resources occupied by the PSCCH may be further determined. For methods of transmitting control information on the PSCCH, please refer to descriptions in existing related technologies. Details will not be explained again here.

[0198] For example, the second terminal device may include a roadside unit or another device capable of receiving and demodulating control information transmitted by the first terminal device in an SL scenario. The specific form of the second terminal device is not limited to this embodiment.

[0199] In this embodiment, it should be understood that the logic for determining the starting position of the frequency domain resources occupied by the PSCCH at the transmitting and receiving ends should be consistent. In other words, in order to correctly receive the control information transmitted over the PSCCH, the second terminal device needs to determine the starting position of the frequency domain resources occupied by the PSCCH. The method procedure shown in Figure 8 further includes the following steps: S830: The second terminal device determines the starting position of the frequency domain resources to be occupied by the control channel, based on the amount of reference signal resources to be set.

[0200] Specifically, the method by which the second terminal device determines the starting position of the frequency domain resources occupied by the control channel based on the quantity of reference signal resources set is the same as that of the first terminal device. Details will not be explained here again. The specific determination method will be explained later with reference to specific examples (e.g., Specific Examples 1 to 3).

[0201] Furthermore, after receiving the control information, the second terminal device can demodulate the control information. The method procedure shown in Figure 8 further includes the following steps: S840: The second terminal device demodulates the control information.

[0202] It should be understood that, regarding the method by which the second terminal device demodulates control information in this embodiment, please refer to the explanations in existing related technologies. Details will not be explained again here.

[0203] In the control information transmission method shown in Figure 8, the first terminal device can determine the starting position of the frequency domain resources occupied by the control channel (e.g., PSCCH) based on the set amount of reference signal resources. The starting position of the frequency domain resources occupied by the control channel differs from the starting position of the frequency domain resources occupied by the shared channel (e.g., PSSCH). As a result, it is not required to be based on the multiplexing configuration of PSSCH and PSCCH (e.g., the starting position of PSCCH coincides with the starting position of PSSCH), and different determination methods exist. With respect to the positioning reference signal and control information, the starting position of PSCCH may differ from the starting position of SL-PRS, improving the flexibility of PSCCH resource allocation, reducing competition and collisions between terminals, and thereby improving the probability and similarity of being able to utilize positioning.

[0204] For the association or allocation of PSCCH resources and SL-PRS resources, this application provides the following three possible solutions:

[0205] Solution 1: A PSCCH resource has a one-to-one correspondence with its associated SL-PRS resource in the same slot. The advantage of this one-to-one correspondence between a PSCCH resource and its associated SL-PRS resource is that when an SL-PRS resource is reserved, the associated PSCCH resource is also reserved. In this way, different UEs occupying different SL-PRS resources transmit SCI by using different PSCCH resources (supporting a one-to-one mapping relationship between a PSCCH resource and its associated SL-PRS resource in the same slot. The advantage of accepting a one-to-one association between a PSCCH resource and an SL-PRS resource is that when an SL-PRS resource is reserved, the associated PSCCH resource is also reserved. In this way, different UEs occupying different SL-PRS resources transmit SCI using different PSCCH resources).

[0206] Solution 2: SL PRS resources are indicated by explicit signaling, and it is assumed that there is no correlation between SL PRS resources and PSCCH resources. The problem with Solution 2 is that even if SL-PRSs are orthogonal, orthogonal PSCCH cannot be guaranteed, or a dedicated PSCCH resource selection is required (explicit signaling of SL PRS resources within the same slot; this alternative does not assume an association between SL PRS and PSCCH resources). The problem with this alternative is that even if SL-PRS are orthogonal, orthogonal PSCCH cannot be guaranteed, or a dedicated PSCCH resource selection is required).

[0207] Solution 3: Association relationships between PSCCH resources and one or more related SL-PRS resources in the same slot are supported, and the SL-PRS resources are indicated by explicit signaling. Solution 3 is highly complex and has high signaling overhead. In the case of such a one-to-many mapping type, it is assumed that the number of SL-PRS resources in a slot is much greater than the number of PSCCH candidate resources. However, in this case, for a single slot, the number of PSCCH candidates is capped by the available SL-PRS resources anyway. This is effectively simplified as a one-to-one mapping. Furthermore, the SCI overhead is significantly increased. This is inappropriate (it supports mapping relationships between PSCCH resources and one or more related SL-PRS resources within the same slot, and this alternative would lead to increased complexity and overhead. This one-to-many mapping assumes that there are far more SL-PRS resources in a slot than PSCCH candidates. However, in this case, it is understood that for a single slot, the number of available SL-PRS resources is capped by the number of PSCCH candidates anyway, effectively reducing it to a one-to-one mapping. Furthermore, the SCI overhead would be significantly higher, which is not justifiable).

[0208] In conclusion, the association scheme shown in Solution 1 is primarily considered in this embodiment. A one-to-one mapping relationship between a PSCCH resource and its associated SL-PRS resource is supported within the same slot (a one-to-one mapping relationship between a PSCCH resource and its associated SL-PRS resource within the same slot is supported with respect to SL-PRS configuration and / or SL-PRS time allocation information).

[0209] It should be understood that in this implementation, explicit signaling of specific SL-PRS resources within the same slot is not required (in this case, explicit signaling of any SL-PRS resources is not required for the same slot), and the quantity of PSCCH resources is the same as the quantity of SL-PRS resources (there are equal numbers of PSCCH resources and SL-PRS resources).

[0210] SL PRS resources are associated with PSCCH resources. For example, SL PRS resource k PRS The start subchannel n of the PSCCH candidate resource associated with subCH start The following relationship is satisfied: (Note that we propose to simplify the association method between SL PRS resources and PSCCH resources. For example, SL PRS resource k PRS The start subchannel n of the PSCCH candidate resource associated with subCH start It is given by the following:)

[0211]

number

[0212] The following describes a specific implementation in which a terminal device determines the starting position of frequency domain resources occupied by a control channel based on the quantity of reference signal resources set, with reference to specific examples (e.g., Specific Examples 1 to 3).

[0213] Specific example 1: The reference signal resource to be configured is an SL-PRS resource configured in one slot.

[0214] Optionally, an SL-PRS resource configured in a single slot may be understood as an SL-PRS resource configured in that slot, or as an SL-PRS resource configured in a resource pool used for SL-PRS transmission. A resource pool used for SL-PRS transmission may include multiple slots, and an SL-PRS resource configured in each of those slots may be understood as an SL-PRS resource configured in a resource pool used for SL-PRS transmission.

[0215] For example, the resource pool used for SL-PRS transmission is resource pool #1, which includes three slots (slot #1, slot #2, and slot #3). If four SL-PRS resources are configured for resource pool #1, this may be understood as the same amount of SL-PRS resources, i.e., four SL-PRS resources, being configured in each of slots #1, #2, and #3.

[0216] As shown in Figure 9, within the time domain, PSCCH occupies the first few symbols (e.g., the first two or three) in a slot, excluding the AGC symbol, while SL-PRS occupies the symbols in the slot, excluding the PSCCH symbol, the AGC symbol, and the interval (GAP) symbol.

[0217] It should be understood that Figure 9 merely illustrates the functions of various symbols within a single slot in the time domain as an example and does not constitute any limitation to the scope of protection of this application. The functions of different symbols within a single slot may alternatively be in other forms. For example, as shown in Figure 9, nd AGC (for example, the AGC between PSCCH and SL-PRS in Figure 9) does not need to be present.

[0218] When four SL-PRS resources (for example, SL-PRS#1, SL-PRS#2, SL-PRS#3, and SL-PRS#4 shown in Figure 9) are pre-configured in a slot (or resource pool in which the slot is located), the bandwidth of the resource pool may be divided into four subbands or four candidate locations (for example, PSCCH#1, PSCCH#2, PSCCH#3, and PSCCH#4 shown in Figure 9). Each subband (or each candidate location) corresponds to one PSCCH, and each subband (or each candidate location) is for transmitting one PSCCH.

[0219] When user UE#A occupies SL-PRS#1 and transmits a positioning reference signal, UE#A occupies one of PSCCH#1 to PSCCH#4 and transmits SPCI.

[0220] For example, UE#A occupies PSCCH#1 and transmits SPCI, where SPCI indicates information related to SL-PRS#1, such as time-domain resource information for SL-PRS#1, frequency-domain resource information for SL-PRS#1, the number of symbols occupied by SL-PRS#1, or the sequence ID of SL-PRS#1.

[0221] When UE#B occupies the SL-PRS#2 resource and transmits a positioning reference signal, UE#B occupies one of PSCCH#1 to PSCCH#4 and transmits SPCI.

[0222] For example, UE#B occupies PSCCH#2 and transmits SPCI, where SPCI indicates information related to SL-PRS#2, such as time-domain resource information for SL-PRS#2, frequency-domain resource information for SL-PRS#2, the number of symbols occupied by SL-PRS#2, or the sequence ID of SL-PRS#2.

[0223] For example, the position of the PSCCH is related to a preset number of SL-PRS, and the frequency domain start positions of different PSCCHs are shown in Figure 10. Figure 10 is a diagram of the frequency domain start positions of different PSCCHs according to an embodiment of the present application.

[0224] The frequency domain start positions of different PSCCHs are shown in RB granularity, and it can be seen from Figure 10(a) that the frequency domain start positions of different PSCCHs are different RBs.

[0225] Figure 10(b) shows that the frequency domain start positions of different PSCCHs are shown at sub-channel granularity, that the frequency domain start positions of different PSCCHs are different sub-channels, and that the frequency domain start position of a PSCCH is the beginning (or lowest) RB of the sub-channel corresponding to the PSCCH; in other words, the frequency domain start positions of different PSCCHs are different RBs.

[0226] It should be understood that Figure 10 merely illustrates an example of possible granularity for the frequency domain start position of the PSCCH and does not constitute any limitation to the scope of protection of this application. For example, the granularity may be RE granularity. Further details are not provided here.

[0227] Specifically, the settings reference signal The number of reference signals for a resource, the starting position of the frequency domain resource, and the index of the frequency domain resource satisfy the following relationship:

[0228]

number

[0229]

number

[0230] Alternatively, set reference signal resource numberThe quantity, the starting position of the frequency domain resource, and the index of the frequency domain resource satisfy the following relationship:

[0231]

number

[0232]

number

[0233]

number

[0234]

number

[0235] For example, the index of the reference signal resource may be the identifier or ID of the reference signal resource, or the reference signal resource This may be obtained through calculations based on configuration information, identifiers, or IDs. For example, the index of a reference signal resource is obtained by sorting the IDs of the reference signal resources in order.

[0236] In possible implementations, k prs The reference signal is as shown in Table A below. resource An ID would also be acceptable. Table A

[0237] [Table 1] In another possible implementation, k prs This is obtained by sorting the IDs of the reference signal resources in order, as shown in Table B below. Table B

[0238] [Table 2] k0 is a fixed constant, e.g., 0, 1, 2, or 3. The frequency domain start position of the control channel described above is the frequency domain position within the resource pool. For example, if the frequency domain start position is 0, it indicates the lowest frequency, lowest sub-channel, or lowest RB in the resource pool. In other words, the absolute frequency domain position of the control channel must be calculated using the lowest frequency in the resource pool as a reference.

[0239] In Example 1, the terminal device can determine the quantity of candidate frequency domain resources for the PSCCH based on the quantity of SL-PRS resources to be set, and when transmitting the PSCCH, it can select one candidate resource from the candidate frequency domain resources for the PSCCH and transmit the PSCCH. The probability that different terminal devices will select the same candidate resource is low, and as a result, the probability of competition between SCIs transmitted by different terminal devices on the PSCCH can be reduced. Furthermore, the complexity of blind detection of the PSCCH is low in the method for determining the PSCCH resources shown in Specific Example 1.

[0240] Specific example 2: A pre-configured reference signal resource is an SL-PRS resource configured within a single slot, and the index of the SL-PRS resource is used to determine the location of the PSCCH corresponding to the SL-PRS.

[0241] Specific Example 1 provides a method for determining the number of candidate PSCCH resources based on the number of SL-PRS resources to be set. Specific Example 2 provides a method for further determining the location of the PSCCH corresponding to an SL-PRS based on the index of the SL-PRS resource for multiple candidate resource locations, i.e., each SL-PRS resource corresponds to the frequency domain location of the PSCCH corresponding to the SL-PRS.

[0242] Specifically, the terminal device determines the index of each of the multiple SL-PRS resources based on the identifiers of the multiple SL-PRS resources, and the terminal device determines the index of each of the multiple sub-bands based on the frequency domain location (or frequency) corresponding to each of the multiple sub-bands.

[0243] In other words, the index of each of the multiple SL-PRS resources is determined based on the identifier of the multiple SL-PRS resources, and the index of each of the multiple sub-bands is determined based on the frequency domain position corresponding to each of the multiple sub-bands.

[0244] For example, suppose three SL-PRS resources are configured, including SL-PRS#1, SL-PRS#2, and SL-PRS#3. The identifiers for SL-PRS#1, SL-PRS#2, and SL-PRS#3 are ID#1, ID#10, and ID#11, respectively. Multiple SL-PRS, i.e., SL-PRS#1, SL-PRS#2, and SL-PRS#3, can be re-encoded (e.g., in descending or ascending order) based on the identifiers of SL-PRS#1, SL-PRS#2, and SL-PRS#3. For example, three reference signal resources can be re-encoded in descending order of the identifiers of the SL-PRS resources to obtain those where the indices of SL-PRS#1, SL-PRS#2, and SL-PRS#3 are 1, 2, and 3, respectively. Furthermore, the number of sub-bands is equal to the number of SL-PRS resources configured. The three subbands include subband #1, subband #2, and subband #3, with frequency domain positions of 2.5 M, 7.5 M, and 12.5 M, respectively. Multiple subbands, i.e., subband #1, subband #2, and subband #3, can be encoded based on their frequency domain positions (e.g., in descending or ascending order). For example, the three subbands are encoded in descending order of their frequency domain positions to obtain that the indices of subband #1, subband #2, and subband #3 are 1, 2, and 3, respectively.

[0245] Specifically, the terminal device transmits (or receives) a first reference signal for a resource whose index is the first index, and transmits (or receives) control information on the control channel based on the starting position of the subband corresponding to the first index.

[0246] In possible implementations, the subband corresponding to the first index may be the subband whose index is the first index.

[0247] For example, the first index is 1, and the index of the sub-band corresponding to the first index is 1.

[0248] In another possible implementation, the subband corresponding to the first index may be a subband whose index relates to the first index. For example, the index of an SL-PRS resource has a one-to-one correspondence with the index of a subband. If the index of the SL-PRS resource is 1, then the index of the corresponding sub-band is 3; If the index of the SL-PRS resource is 2, then the index of the corresponding sub-band is 1; If the index of the SL-PRS resource is 3, then the index of the corresponding sub-band is 2; ). If the first index is 1, then the index of the sub-band corresponding to the first index is 3.

[0249] Specifically, the one-to-one correspondence between the SL-PRS resource index and the sub-band index may be stored on the terminal device in the form of a pre-configured table.

[0250] For example, the relationship between the SL-PRS resource index and the sub-band index is shown in Tables 1 and 2 below. Table 1

[0251] [Table 3] The cases shown in Table 1 demonstrate that the index for the SL-PRS resource and the index for the sub-band are the same. Table 2

[0252] [Table 4] The cases shown in Table 2 demonstrate that the index of the SL-PRS resource has a one-to-one correspondence with the index of the sub-band.

[0253] To facilitate understanding, we will illustrate the case where different SL-PRS resources correspond to different candidate resource locations in the PSCCH, referring to Figure 11. As shown in Figure 11, different SL-PRS resources correspond to different candidate resource locations in the PSCCH.

[0254] Figure 11 shows that SL-PRS#1 to SL-PRS#4 resources correspond to candidate PSCCH resources #1 to #4, respectively. SPCI#1, transmitted on candidate resource #1 of PSCCH, indicates information related to the SL-PRS#1 resource. SPCI#2, sent on candidate resource #2 of PSCCH, indicates information related to the SL-PRS#2 resource. SPCI#3, sent on candidate resource #3 of PSCCH, indicates information related to the SL-PRS#3 resource. Figure 11 shows that SPCI#4, transmitted on candidate resource #4 of PSCCH, indicates information related to the SL-PRS#4 resource.

[0255] In other words, after determining the four candidate resource locations of the PSCCH according to the method shown in Example 1, the first terminal does not randomly select a candidate resource location from among the candidate resource locations to be the resource of the PSCCH, but rather determines a specific candidate resource of the PSCCH to be the resource of the PSCCH based on the SL-PRS resources occupied for transmitting SL-PRS.

[0256] For example, the first terminal can perform joint coding on four configured SL-PRS resources. The joint coding scheme includes: coding the indices of different SL-PRS resources as 1, 2, 3, and 4, or 0, 1, 2, and 3, based on the resource ID or by another coding scheme, i.e., one SL-PRS resource corresponds to one identifier.

[0257] Next, the first terminal encodes the four determined candidate resource locations of the PSCCH in ascending order of frequency as 1, 2, 3, and 4, or 0, 1, 2, and 3, or other codes. That is, one candidate resource location of the PSCCH corresponds to one index. The encoding scheme of the first terminal for multiple SL-PRS resources is the same as the encoding scheme for the candidate resource locations of the PSCCH.

[0258] For example, if the indices of the four SL-PRS resources are 1, 2, 3, and 4 respectively, then the indices of the four candidate resource locations in PSCCH are 1, 2, 3, and 4, respectively.

[0259] For example, if the indices of the four SL-PRS resources are 0, 1, 2, and 3 respectively, then the indices of the four candidate resource locations in PSCCH are 0, 1, 2, and 3, respectively.

[0260] When a terminal transmits an SL-PRS on an SL-PRS resource with index 1, the terminal correspondingly transmits an SCI on a PSCCH at a candidate PSSCH location with index 1. Alternatively, when a terminal receives an SL-PRS on an SL-PRS resource with index 1, the terminal correspondingly receives an SCI on a PSCCH at a candidate PSSCH location with index 1. Specifically, the formula for calculating the frequency domain start position of a PSCCH may be expressed as follows: If the index of the SL-PRS resource is encoded starting from 0:

[0261]

number

[0262]

number

[0263]

number

[0264] For example, f k This specifies a fixed offset value. The offset value may be associated with an index or may be independent of an index. The value of the offset value may be 0, 1, 2, ... or another natural number. This is not limited to this example.

[0265] In contrast to Example 1, Example 2 specifically designs the mapping relationship between candidate resource locations on the PSCCH and SL-PRS resources. The specific starting frequency of the PSCCH is determined based on the SL-PRS index by encoding the configured SL-PRS resource. This avoids conflicts between SCIs transmitted by different terminal devices on the PSCCH.

[0266] Specific example 3: The reference signal resource to be configured is an SL-PRS resource configured in multiple slots.

[0267] In specific examples 1 and 2, the candidate resource locations for PSCCH are determined based on the number of SL-PRS resources set within a slot. In specific example 3, a method is planned to determine the candidate resource frequency domain locations for PSCCH by coordinating and encoding SL-PRS resources in multiple slots.

[0268] Specifically, if multiple resources are located in multiple slots, at least one of those slots contains multiple frequency domain resources, each corresponding to a different PSCCH.

[0269] In possible implementations, odd-numbered slots contain candidate resource locations for PSCCH, while all even-numbered slots are used for SL-PRS transmission.

[0270] In another possible implementation, even-numbered slots contain candidate resource locations for PSCCH, while all odd-numbered slots are used for SL-PRS transmission.

[0271] In yet another possible implementation, the first slot contains candidate resource locations for PSCCH, and all remaining slots are used for SL-PRS transmission.

[0272] The aforementioned implementations are merely illustrative examples. When PSCCH is designed in conjunction with multiple slots, at least one of the multiple slots contains candidate resource locations for the PSCCH. The specific one or more slots containing candidate resource locations for the PSCCH are not limited to this embodiment.

[0273] To facilitate the explanation, joint encoding of two slots is used as an example. For example, slot 1 represents odd-numbered slots, and slot 2 represents even-numbered slots. As shown in Figure 12, slot 1 contains both PSCCH and SL-PRS resources, while slot 2 contains only SL-PRS resources. The SCI corresponding to the SL-PRS in slot 2 is transmitted using the PSCCH resource in slot 1.

[0274] It is assumed that four resources are configured in slot 1 and two resources are configured in slot 2. In this case, the two slots have a total of six SL-PRS resources. Therefore, there are a total of six PSCCH candidate positions in slot 1, which correspond to SL-PRS#1 through SL-PRS#6, respectively.

[0275] It should be understood that the above explanation is merely an example of two slots and can be extended to other cases. For example, SL-PRS in three or more slots may be coded together and share PSCCH resources within the same slot. Furthermore, slot 1 may alternatively contain only PSCCH resources and not SL-PRS resources or similar.

[0276] The PSCCH of SL-PRS resources across multiple slots is planned in conjunction, effectively reducing the resource overhead of the PSCCH. For example, if each PSCCH in a slot occupies three symbols, the overhead is 3 / 14. If two slots are coded in conjunction, the PSCCH overhead becomes 3 / 28, reduced by half. This improves SL-PRS resource utilization and SL-PRS capacity or user capacity.

[0277] For example, if a PSCCH resource is present in each slot, the overhead of the PSCCH resource is excessively high for positioning. In the method for jointly planning PSCCH across multiple slots provided in Specific Example 3, the PSCCH resource is present in only some slots, and joint indications are made to the SL-PRS in that slot (the slot where the PSCCH resource is present) and to the SL-PRS in other slots, thereby effectively reducing the resource overhead of PSCCH.

[0278] Furthermore, the multiplexing schemes among multiple SL-PRS resources are not limited to this embodiment of the present application. For example, comb-type, frequency-type, time-type, comb-type, and similar schemes may be performed for SL-PRS#1 to SL-PRS#4. Comb-type multiplexing refers to the arrangement of different SL-PRS resources orthogonally to each other like the teeth of a comb, which may be understood as specific time-type and frequency-type multiplexing schemes. For example, a comb-type multiplexing scheme is used for SL-PRS#1 to SL-PRS#4 in Figure 11.

[0279] To facilitate understanding, the multiplexing scheme between SL-PRS resources will be briefly explained with reference to Figure 13.

[0280] Figure 13 shows that a comb-type multiplexing scheme is being used among multiple SL-PRS resources.

[0281] In the control information transmission method shown in Figure 8, a method for determining the location of PSCCH resources is considered when a specific number of SL-PRS resources are pre-configured. This application further provides another communication scheme relating to how a terminal device determines the location of PSCCH resources when the number of SL-PRS resources is not pre-configured, and how a network device configures the terminal's SL-PRS resources on demand based on the terminal device's request. The control information transmission method will be described in detail with reference to Figure 14.

[0282] Figure 14 is a schematic flowchart of another control information transmission method according to an embodiment of the present application. The method includes the following steps.

[0283] S1410: The first terminal device receives configuration information from the network device.

[0284] Specifically, the configuration information is used to set the reference signal resources.

[0285] S1420: The first terminal determines the starting position of the frequency domain resources to be occupied by the control channel, based on the configuration information.

[0286] The control channel is for carrying control information, which indicates information related to the reference signal.

[0287] In possible implementations, configuration information is referenced to the reference signal. resource Includes corresponding comb tooth size and frequency domain offset value.

[0288] In another possible implementation, the configuration information may include an identifier (ID) of the reference signal resource, information about the PSCCH carried in the configuration of the reference signal resource, information about the SCI carried in the configuration of the reference signal resource, or similar. The information about the PSCCH may be an index of the PSCCH, which indicates the frequency domain start position of the PSCCH. The information about the SCI may also indicate the frequency domain start position of the PSCCH.

[0289] It should be understood that the aforementioned implementations are merely examples illustrating specific content included in the configuration information and do not constitute any limitation on the scope of protection of this application. Other configuration information of reference signal resources that can be used to determine the starting position of frequency domain resources occupied by the control channel also falls within the scope of protection of this application. Specific examples will not be described again here.

[0290] To simplify the explanation, the configuration information is a reference signal. resource Examples including corresponding comb tooth sizes and frequency domain offset values ​​are used below for illustrative purposes.

[0291] In a possible implementation, the first terminal uses the starting position of the first subband within multiple subbands of the bandwidth of the resource pool where the reference signal resource is located as the starting position of the frequency domain resource, the number of subbands relating to the comb size, the ranking of the first subband within multiple subbands relating to the frequency domain offset value, and the starting position of the subband includes one of the following: starting resource block index, starting subchannel index, starting frequency index, or starting subcarrier index.

[0292] In other words, the first terminal divides the bandwidth of the resource pool where the reference signal resource is located into multiple subbands based on the comb tooth size, and the number of multiple subbands is related to the comb tooth size. The first terminal determines the ranking of the subbands corresponding to the frequency domain resource within the multiple subbands based on the frequency domain offset value, and the starting position of the subband corresponding to the frequency domain resource is the starting position of the frequency domain resource.

[0293] In another possible implementation, the first terminal is the reference signal resource Based on the corresponding comb tooth size and frequency domain offset value, it is possible to directly determine the starting position of the frequency domain resources occupied by the control channel. For example, a reference signal resource A correspondence is pre-configured between the corresponding comb tooth size and frequency domain offset value, and the starting position of the frequency domain resource occupied by the control channel.

[0294] Some of the aforementioned implementations use a reference signal. resource It should be understood that this is merely an example illustrating a method for determining the starting position of frequency domain resources occupied by a control channel based on the corresponding comb tooth size and frequency domain offset value, and does not constitute any limitation to the scope of protection of this application. Reference signal resource Other methods for determining the starting position of frequency domain resources occupied by a control channel, based on the corresponding comb tooth size and frequency domain offset value, also fall within the scope of protection of this application. Specific examples will not be described again here.

[0295] To simplify the explanation, the first terminal below is the reference signal resourceAn example is used in which multiple subbands are determined based on the corresponding comb tooth size and frequency domain offset value, and the starting position of one of the multiple subbands in the bandwidth of the resource pool where the reference signal resource is located is used as the starting position of the frequency domain resource.

[0296] For example, the bandwidth of multiple sub-bands is the same.

[0297] For example, if the bandwidth of the resource pool where the reference signal resource is located is an integer multiple of the comb size, then a terminal device dividing the bandwidth of the resource pool where the reference signal resource is located into multiple subbands based on the comb size includes: the terminal device dividing the bandwidth of the resource pool where the reference signal resource is located into multiple subbands equally based on the comb size.

[0298] For example, a network device might configure SL-PRS resource 1 for UE#A and SL-PRS resource 2 for UE#B.

[0299] The comb tooth size of both SL-PRS resource 1 and SL-PRS resource 2 is 4, the offset value of SL-PRS resource 1 is 0, and the offset value of SL-PRS resource 2 is 1.

[0300] In this case, UE#A divides the resource pool bandwidth (or bandwidth occupied by SL-PRS, system bandwidth, available bandwidth for PSCCH, or similar) into four subbands, i.e., four candidate resources for PSCCH. Since the offset value of SL-PRS resource 1 is 0, i.e., there is no offset, the first candidate resource for PSCCH among the four candidate resources for PSCCH is UE#A's PSCCH resource, which is for transmitting SPCI.

[0301] Since the frequency domain offset value of SL-PRS resource 2 is 1, UE#B transmits SPCI on the second candidate PSCCH resource out of the four candidate PSCCH resources.

[0302] Candidate resources for PSCCH are determined using the method described above, and as a result, conflicts between control information carried on PSCCHs of different terminal devices can be avoided.

[0303] Specifically, the formula for calculating the frequency domain position of PSCCH may be expressed as follows:

[0304]

number

[0305]

number

[0306] If the base station does not pre-configure SL-PRS resources for the terminal, the terminal cannot determine the number of SL-PRS resources in a single slot and, therefore, the location of the corresponding PSCCH resource. In this case, a method is provided for determining the location of the PSCCH resource based on the SL-PRS comb tooth size and frequency domain offset value. Different users typically occupy different comb teeth, i.e., different frequency domain offset values ​​exist, so different candidate locations for the PSCCH are provided to avoid collisions.

[0307] Unlike conventional methods for determining PSCCH resources, the embodiment shown in Figure 14 provides a method for determining PSCCH resources based on SL-PRS configuration information, comb tooth count, and offset value. To avoid conflicts between SL-PRS, different users' SL-PRS configurations are required to be different (different comb teeth, different frequency domain offset values, and similar ones are required). Therefore, the PSCCH determined based on the SL-PRS configuration will also be different. This can reduce the probability of conflicts caused by different terminal devices transmitting control information on the control channel.

[0308] It should be understood that the sequence numbers of the aforementioned processes do not represent the execution sequence. The execution sequence of a process should be determined based on the function and internal logic of the process and should not be interpreted as any limitation on the implementation process of the embodiments of this application.

[0309] In the embodiments of this application, unless otherwise stated or there is no logical inconsistency, it should be further understood that the terminology and / or descriptions in different embodiments are consistent and may be mutually referenced, and that technical features in different embodiments may be combined based on their internal logical relationships to form new embodiments. For example, fixed candidate resource locations for the PSCCH may be designed, and a particular resource location for the PSCCH may be determined based on the UE ID.

[0310] It should be further understood that in some of the embodiments described above, devices in existing network architectures (e.g., network devices or terminal devices) are primarily used as illustrative examples. It should be understood that the specific form of the device is not limited to the embodiments of this application. For example, all devices capable of performing the same function in the future are applicable to the embodiments of this application.

[0311] In the embodiments of the method described above, it is possible to understand that the methods and operations performed by the network device may be alternatively performed by components that may be used in the network device, and the methods and operations performed by the terminal device may be alternatively performed by components that may be used in the terminal device.

[0312] The control information transmission method provided in the embodiments of this application is described in detail above with reference to Figures 3 to 14. The aforementioned control information transmission method is described primarily from the perspective of a terminal device. To realize the aforementioned functions, it is possible to understand that the terminal device includes a corresponding hardware structure and / or software module for performing the functions.

[0313] A person skilled in the art will recognize that, in this application, the units and algorithmic steps of the embodiments described with reference to the embodiments disclosed in this specification can be implemented by hardware or by a combination of hardware and computer software. Whether the functions are performed by hardware or by hardware driven by computer software depends on the specific application and design constraints of the technical solution. A person skilled in the art may use different methods to implement the described functions for a particular application, but such implementations should not be considered to extend beyond the scope of this application.

[0314] The communication device provided in the embodiments of this application will be described in detail below with reference to Figures 15 and 17. It should be understood that the description of the device embodiments corresponds to the description of the method embodiments. Therefore, for matters not described in detail, please refer to the method embodiments described above. For brevity, some matters will not be described again.

[0315] In embodiments of this application, the functional modules of the transmitting or receiving end device may be obtained by partitioning based on the method examples described above. For example, each functional module may be obtained by partitioning based on each function, or two or more functions may be integrated into a single processing module. The integrated module may be implemented in hardware form or in the form of a software functional module. It should be noted that in embodiments of this application, module partitioning is merely an example and is simply a logical functional partitioning. In actual implementations, other partitioning methods may be used. The following explanation will use examples in which each functional module is obtained by partitioning based on its corresponding function.

[0316] Figure 15 is a block diagram of a communication device 10 according to an embodiment of the present application. The device 10 includes a transceiver module 11 and a processing module 12. The transceiver module 11 is capable of implementing corresponding communication functions, and the processing module 12 is configured to perform data processing. In other words, the transceiver module 11 is configured to perform transmit / receive related operations, and the processing module 12 is configured to perform operations other than receive and transmit. The transceiver module 11 may also be referred to as a communication interface or communication unit.

[0317] It should be understood that the aforementioned transceiver module 11 may include a transmit module and a receive module. The transmit module is configured to perform the transmit operation of the communication device, and the receive module is configured to perform the receive operation of the communication device. For ease of explanation, in this embodiment of the present application, the transmit module and the receive module are combined into a single transceiver unit. This has been consistently described herein and will not be described again in detail below.

[0318] Optionally, the device 10 may further include a storage module 13. The storage module 13 can be configured to store instructions and / or data. The processing module 12 can read the instructions and / or data from the storage module so that the device can perform the operation of the device in the embodiment of the method described above.

[0319] In the first design, the device 10 may correspond to the first terminal device in the embodiment of the method described above, or it may be a component of the first terminal device (e.g., a chip).

[0320] Apparatus 10 can perform steps or procedures performed by the first terminal device in embodiments of the method described above. Transceiver module 11 can be configured to perform transmit / receive related operations of the first terminal device in embodiments of the method described above. Processing module 12 can be configured to perform processing related operations of the first terminal device in embodiments of the method described above.

[0321] In a possible implementation, the processing module 12 is configured to determine the starting position of the frequency domain resources occupied by the control channel based on the number of reference signal resources to be set, the control channel is for carrying control information, and the reference signal resources to be set include multiple reference signal resources. The transceiver module 11 is configured to transmit control information on the control channel based on the starting position of the frequency domain resources.

[0322] When the device 10 is configured to perform the method shown in Figure 8, the transceiver module 11 can be configured to perform the step of transmitting information in the method, for example, step S820, and the processing module 12 can be configured to perform the processing step in the method, for example, step S810.

[0323] When the device 10 is configured to perform the method shown in Figure 14, the transceiver module 11 can be configured to perform the steps of transmitting / receiving information in the method, for example, step S1410, and the processing module 12 can be configured to perform the processing steps in the method, for example, step S1420.

[0324] It should be understood that the specific process by which the unit performs the corresponding steps described above is described in detail in the embodiments of the method described above. For the sake of brevity, the details will not be described again here.

[0325] In the second design, the device 10 may correspond to the second terminal device in the embodiment of the method described above, or it may be a component of the second terminal device (e.g., a chip).

[0326] Apparatus 10 can perform steps or procedures performed by the second terminal device in the embodiments of the method described above. Transceiver module 11 can be configured to perform transmit / receive related operations of the second terminal device in the embodiments of the method described above. Processing module 12 can be configured to perform processing related operations of the second terminal device in the embodiments of the method described above.

[0327] In a possible implementation, the processing module 12 is configured to determine the starting position of the frequency domain resources occupied by the control channel based on the number of reference signal resources to be set, the control channel is for carrying control information, and the reference signal resources to be set include multiple reference signal resources. The transceiver module 11 is configured to transmit control information on the control channel based on the starting position of the frequency domain resources.

[0328] When the device 10 is configured to perform the method shown in Figure 8, the transceiver module 11 can be configured to perform the steps of transmitting / receiving information in the method, for example, step S820, and the processing module 12 can be configured to perform the processing steps in the method, for example, steps S830 and S840.

[0329] It should be understood that the specific process by which the unit performs the corresponding steps described above is described in detail in the embodiments of the method described above. For the sake of brevity, the details will not be described again here.

[0330] It should be further understood that the device 10 in this invention is embodied in the form of a functional module. The term “module” in this invention may include an application-specific integrated circuit (ASIC), an electronic circuit, a processor configured to run one or more software or firmware programs (e.g., a shared processor, a dedicated processor, or a group processor), memory, merged logic circuits, and / or other suitable components that support the described function. In an optional example, it will be understood by those skilled in the art that the device 10 may specifically be a mobility management network element in the embodiments described above, or configured to perform procedures and / or steps corresponding to a mobility management network element in the embodiments of the method described above. Alternatively, the device 10 may specifically be a terminal device in the embodiments described above, or configured to perform procedures and / or steps corresponding to a terminal device in the embodiments of the method described above. To avoid repetition, further details are not described here.

[0331] The device 10 in the aforementioned solution has the function of performing the corresponding steps performed by the device (e.g., a mobility management network element, a session management network element, a relay terminal device, or a remote terminal device) in the aforementioned method. The function may be performed by hardware or by hardware running the corresponding software. The hardware or software includes one or more modules corresponding to the aforementioned function. For example, a transceiver module may be replaced with a transceiver (for example, a transmitting unit in a transceiver module may be replaced with a transmitter, and a receiving unit in a transceiver module may be replaced with a receiver), and another unit, for example, a processing module, may be replaced with a processor to perform the transmit / receive operation and the processing-related operation in the embodiment of the method, respectively.

[0332] Alternatively, the transceiver module 11 may be a transceiver circuit (for example, one that may include a receiving circuit and a transmitting circuit), and the processing module may be a processing circuit.

[0333] Figure 16 is a diagram of another communication device 20 according to an embodiment of the present application. The device 20 includes a processor 21. The processor 21 is configured to execute computer programs or instructions stored in memory 22, or to read data / signaling stored in memory 22 and execute the method in the embodiment of the method described above. Optionally, there may be one or more processors 21.

[0334] Optionally, as shown in Figure 16, the device 20 further includes memory 22, which is configured to store computer programs or instructions and / or data. Memory 22 may be integrated with the processor 21 or may be located separately. Optionally, one or more memories 22 may be present.

[0335] Optionally, as shown in Figure 16, the device 20 further includes a transceiver 23, which is configured to receive and / or transmit signals. For example, a processor 21 is configured to control the transceiver 23 to receive and / or transmit signals.

[0336] It should be understood that the aforementioned transceiver 23 may include a transmit module and a receive module. The transmit module is configured to perform the transmit operation of the communication device, and the receive module is configured to perform the receive operation of the communication device. For ease of explanation, in this embodiment of the present application, the transmit module and the receive module are combined into a single transceiver 23. This has been consistently described in the present application and will not be described again in detail below.

[0337] In the solution, the device 20 is configured to perform the operations performed by the first terminal device in the embodiment of the method described above.

[0338] In another solution, the device 20 is configured to perform an operation performed by the second terminal device in the embodiment of the method described above.

[0339] The processor referred to in the embodiments of this application is a central processing unit (C It may also be a PU, or alternatively, another general-purpose processor, a digital signal processor. (D SP), Application-Specific Integrated Circuits (A SIC), Field-Programmable Gate Array (F It should be understood that this may be a PGA or another programmable logic device, discrete gate or transistor logic device, discrete hardware component, or similar. The general-purpose processor may be a microprocessor, or the processor may be any conventional processor or similar.

[0340] It should be further understood that the memory referred to in the embodiments of this application may be volatile memory and / or non-volatile memory. Non-volatile memory is read-only memory. (R OM), Programmable Read-Only Memory (P ROM), Erasable Programmable Read-Only Memory (E PROM (Programmable Read-Only Memory), electrically erasable programmable read-only memory (E It may be EPROM or flash memory. The volatile memory may be random access memory (RAM). For example, RAM may be used as an external cache. RAM is a static random access memory, not an extension. (S RAM, Dynamic Random Access Memory (DRAM, Synchronous Dynamic Random Access Memory (S DRAM (Double Data Rate Synchronized Dynamic Random Access Memory) (D DR SDRAM, Extended Synchronous Dynamic Random Access Memory (E SDRAM, SyncLink Dynamic Random Access Memory (S LDRAM, and Direct Rambus Random Access Memory (D This includes multiple forms such as R RAM.

[0341] It should be noted that if the processor is a general-purpose processor, DSP, ASIC, FPGA, or another programmable logic device, discrete gate or transistor logic device, or discrete hardware component, then memory (storage module) may be integrated into the processor.

[0342] Furthermore, it should be noted that the memory described herein is intended to include, but is not limited to, these types of memory and any other suitable types of memory.

[0343] Figure 17 is a diagram of a chip system 30 according to an embodiment of the present application. The chip system 30 (also referred to as a processing system) includes a logic circuit 31 and an input / output interface 32.

[0344] The logic circuit 31 may be a processing circuit in the chip system 30. The logic circuit 31 is coupled to and connected to a storage unit and is capable of calling instructions in the storage unit, so that the chip system 30 can carry out the methods and functions of the embodiments of this application. The input / output interface 32 may be an input / output circuit in the chip system 30 that outputs information processed by the chip system 30 or inputs data or signaling information to be processed into the chip system 30 for processing.

[0345] In one solution, the chip system 30 is configured to perform the operations performed by the first terminal device in the embodiment of the method described above.

[0346] For example, the logic circuit 31 is configured to perform processing-related operations performed by the first terminal device in the embodiment of the method described above, and the input / output interface 32 is configured to perform transmission and / or reception-related operations performed by the first terminal device in the embodiment of the method described above.

[0347] In an alternative solution, the chip system 30 is configured to perform the operations performed by the second terminal device in the embodiments of the method described above.

[0348] For example, the logic circuit 31 is configured to perform processing-related operations performed by the second terminal device in the embodiment of the method described above, and the input / output interface 32 is configured to perform transmission and / or reception-related operations performed by the second terminal device in the embodiment of the method described above.

[0349] Embodiments of the present application further provide a computer-readable storage medium. The computer-readable storage medium stores computer instructions for carrying out the method performed by the device in the embodiment of the method described above.

[0350] For example, when a computer program is executed by a computer, the computer can implement the method executed by the first terminal device in the embodiment of the method described above.

[0351] In another example, when a computer program is executed by a computer, the computer can implement the method executed by the second terminal device in the embodiment of the method described above.

[0352] Embodiments of the present application further provide a computer program product. The computer program product includes instructions. When the instructions are executed by a computer, the method of execution by a device in the embodiments of the method described above (for example, a first terminal device, or in another example, a second terminal device) is implemented.

[0353] Embodiments of the present application further provide a communication system, which includes the aforementioned first terminal device and the aforementioned second terminal device.

[0354] For a description of any one relevant aspect and beneficial effect of the apparatus provided above, please refer to the corresponding embodiment of the method provided above. Further details are not described here again.

[0355] It should be understood that, in some embodiments provided in this application, the devices and methods disclosed may be implemented in other ways. For example, the embodiments of the devices described are merely examples. For example, the division into units is merely a logical functional division, and other divisions may be used in actual implementations. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not performed. Furthermore, mutual coupling, direct coupling, or communication connection illustrated or discussed may be implemented through some interface. Indirect coupling or communication connection between devices or units can be implemented electronically, mechanically, or in other forms.

[0356] All or part of the embodiments described above may be implemented using software, hardware, firmware, or any combination thereof. When software is used to implement the embodiments described above, all or part of the embodiments described above may be implemented in the form of a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded into a computer and executed, the procedures or functions according to the embodiments of this application occur, in whole or in part. The computer may be a general-purpose computer, a dedicated computer, a computer network, or another programmable device. For example, the computer may be a personal computer, a server, a network device, or the like. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wired (e.g., coaxial cable, optical fiber, or digital subscriber line (DSL)) or wireless (e.g., infrared, radio, or microwave). Computer-readable storage media may be any available medium accessible by a computer, or a data storage device that integrates one or more available media, such as a server or data center. Available media include magnetic media (e.g., floppy disks, hard disks, or magnetic tapes), optical media (e.g., DVDs), and semiconductor media (e.g., solid-state drives). (S SD)), or similar media may be used. For example, usable media include any media capable of storing program code, such as USB flash drives, removable hard disks, and read-only memory. (R OM), Random Access Memory (RThis may include, but is not limited to, AM, magnetic disks, or optical disks.

[0357] The foregoing description is merely a specific embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modification or substitution readily apparent to a person skilled in the art within the scope of the technical scope disclosed in the present application shall fall within the scope of protection of the present application. Accordingly, the scope of protection of the present application shall be subject to the scope of protection of the claims.

Claims

1. A transmission method: The steps of determining the frequency domain position of the physical sidelink control channel (PSCCH) corresponding to the sidelink reference signal resource according to the index of the sidelink reference signal resource; and The step of transmitting or receiving the PSCCH at the aforementioned frequency domain location; A method that includes this.

2. The method according to claim 1, wherein the frequency domain location is one of a plurality of candidate resource locations.

3. The method according to claim 1, the step of determining the frequency domain position of the physical sidelink control channel (PSCCH) corresponding to the sidelink reference signal resource according to the index of the sidelink reference signal resource is: A step of determining a subband index of a PSCCH corresponding to a sidelink reference signal resource based on the index of the sidelink reference signal resource, wherein the subband indicates the frequency domain position; Methods that include...

4. The method according to claim 3, wherein the index of the sidelink reference signal resource has a one-to-one correspondence with the subband index of the PSCCH.

5. The method according to claim 3, wherein the index of the sidelink reference signal resource is the same as the subband index of the PSCCH.

6. A method according to claim 1, wherein the PSCCH is used to carry control information, and the control information indicates relevant information of a sidelink reference signal corresponding to the sidelink reference signal resource.

7. A computer-readable storage medium for storing a computer program, wherein when the computer program is executed by a computer, the method according to any one of claims 1 to 6 is performed.

8. A computer program that causes a computer to perform the method described in any one of claims 1 to 6.

9. A communication device including a processor, wherein the processor is configured to execute a computer program or computer instruction in memory in order to perform the method according to any one of claims 1 to 6.

10. A processing module configured to determine the frequency domain position of the physical sidelink control channel (PSCCH) corresponding to the sidelink reference signal resource according to the index of the sidelink reference signal resource; and A transceiver module configured to transmit or receive the PSCCH at the aforementioned frequency domain location; A communication device that includes [this].

11. A communication device according to claim 10, wherein the frequency domain location is one of a plurality of candidate resource locations.

12. In the communication device according to claim 10, the transceiver module is: A communication device configured to determine a subband index of a PSCCH corresponding to a sidelink reference signal resource based on the index of the sidelink reference signal resource, wherein the subband indicates the frequency domain location.

13. A communication device according to claim 12, wherein the index of the sidelink reference signal resource has a one-to-one correspondence with the subband index of the PSCCH.

14. A communication device according to claim 12, wherein the index of the sidelink reference signal resource is the same as the subband index of the PSCCH.

15. A communication device according to claim 10, wherein the PSCCH is used to transport control information, and the control information indicates related information of a sidelink reference signal corresponding to the sidelink reference signal resource.

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