CN117676829A

CN117676829A - Signal transmission method, device, terminal and storage medium

Info

Publication number: CN117676829A
Application number: CN202210957909.0A
Authority: CN
Inventors: 纪鹏宇; 张静文
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2024-03-08
Also published as: WO2024032473A1

Abstract

The application discloses a signal transmission method, a signal transmission device, a terminal and a storage medium. The method comprises the following steps: a first terminal determining a second resource of a physical side link control channel (PSCCH) in a time unit based on a first resource of a reference signal for Side Link (SL) positioning in the time unit; and transmitting the reference signal through the first resource and transmitting the PSCCH through the second resource.

Description

Signal transmission method, device, terminal and storage medium

Technical Field

The present disclosure relates to the field of wireless communications, and in particular, to a signal transmission method, apparatus, terminal, and storage medium.

Background

In the related art, there is a need for positioning on a Side Link (SL), so that a terminal (e.g., a vehicle) operating on the Side Link (SL) can better implement a positioning service, thereby meeting the positioning requirement in a commercial scenario such as a factory. In the related art, what positioning method (e.g., time difference of arrival (TDOA), round Trip Time (RTT), angle of arrival (AOA)/angle of departure (AOD), etc.) is adopted in SL positioning is evaluated.

However, when a User Equipment (UE) operates in a SL mode (mode) 2 mode, collision of resources of reference signals for positioning may occur, thereby affecting reliability of positioning, and degrading system performance.

Disclosure of Invention

In order to solve the related technical problems, embodiments of the present application provide a signal transmission method, a signal transmission device, a terminal, and a storage medium.

The technical scheme of the embodiment of the application is realized as follows:

the embodiment of the application provides a signal transmission method, which is applied to a first terminal and comprises the following steps:

determining a second resource of a physical side link control channel (PSCCH) in a time unit according to a first resource of a reference signal for SL positioning in the time unit;

and transmitting the reference signal through the first resource and transmitting the PSCCH through the second resource.

In the above solution, the determining, according to the first resource of the reference signal for SL positioning in one time unit, the second resource of the PSCCH in the time unit includes:

and determining a second frequency domain resource contained in the second resource according to the comb tooth offset and/or the comb tooth size of the first resource.

In the above scheme, the index of the second frequency domain resource is determined according to the comb tooth offset of the first resource.

In the above scheme, the size of the second frequency domain resource is determined according to the comb tooth size of the first resource.

In the above scheme, the first time domain resource contained in the first resource is different from the second time domain resource contained in the second resource.

In the above solution, the second time domain resource included in the second resource is a subset of the first time domain resource included in the first resource, and the first frequency domain resource included in the first resource is different from the second frequency domain resource included in the second resource.

In the above solution, the second time domain resource includes the first N sub-time units of the first time domain resource, where N is an integer greater than or equal to 1.

In the above scheme, in the subset, the first frequency domain resource is in the range of the second frequency domain resource.

In the above solution, the first resource includes at least one of:

time domain resources;

frequency domain resources;

comb tooth size;

the comb teeth are offset.

The embodiment of the application also provides a signal transmission method, which is applied to the second terminal and comprises the following steps:

receiving a PSCCH on a second resource within a time cell;

determining a first resource of a reference signal for SL positioning in the time unit according to the second resource;

The reference signal is received on the first resource.

In the above solution, the determining, according to the second resource, a first resource of a reference signal for SL positioning in the time unit includes:

and determining comb tooth offset of the first resource according to the index of the second frequency domain resource.

In the above solution, the first resource includes at least one of:

time domain resources;

frequency domain resources;

comb tooth size;

the comb teeth are offset.

The embodiment of the application also provides a signal transmission device, which comprises:

A first determining unit, configured to determine a second resource of the PSCCH in a time unit according to a first resource of a reference signal of SL positioning in the time unit;

and a transmitting unit, configured to transmit the reference signal through the first resource and transmit the PSCCH through the second resource.

a first receiving unit for receiving the PSCCH on a second resource within a time unit;

a second determining unit, configured to determine, according to the second resource, a first resource of a reference signal for SL positioning within the time unit;

and a second receiving unit, configured to receive the reference signal on the first resource.

The embodiment of the application also provides a first terminal, which comprises:

a first processor configured to determine a second resource of the PSCCH in a time unit according to a first resource of a reference signal of SL location in the time unit;

and a first communication interface, configured to send the reference signal through the first resource and send the PSCCH through the second resource.

The embodiment of the application also provides a second terminal, which comprises:

a second communication interface for receiving the PSCCH on a second resource within a time cell and for receiving a reference signal for SL positioning on a first resource within the time cell;

And the second processor is used for determining the first resource according to the second resource.

The embodiment of the application also provides a first terminal, which comprises: a first processor and a first memory for storing a computer program capable of running on the processor,

the first processor is configured to execute any one of the steps of the method on the first terminal side when running the computer program.

The embodiment of the application also provides a second terminal, which comprises: a second processor and a second memory for storing a computer program capable of running on the processor,

and the second processor is used for executing any step of the method at the second terminal side when the computer program is run.

The embodiment of the application also provides a storage medium, on which a computer program is stored, where the computer program when executed by a processor implements the steps of any method on the first terminal side or implements the steps of any method on the second terminal side.

According to the signal transmission method, the signal transmission device, the terminal and the storage medium, the first terminal determines second resources of the PSCCH in a time unit according to first resources of a reference signal for SL positioning in the time unit; the second terminal receiving the PSCCH on the second resource; and determining the first resource of the reference signal according to the second resource; the reference signal is received on the first resource. According to the scheme provided by the embodiment of the application, under the condition that the resources of the reference signals for SL positioning are indicated by the corresponding PSCCH, a mapping relation is established between the PSCCH and the resources of the reference signals for SL positioning, and the PSCCH resources are directly determined according to the mapping relation, so that the extra process of eliminating the resources of the PSCCH can be avoided on the basis that the terminal selects and reserves the resources of the reference signals for SL positioning.

Drawings

FIG. 1 is a diagram illustrating a SL next resource selection mechanism;

fig. 2 is a schematic diagram of a multiplexing mechanism of reference signal resources between SL lower terminals;

FIG. 3 is a schematic diagram of collision of reference signal resources between SL lower terminals;

fig. 4 is a schematic flow chart of a signal transmission method according to an embodiment of the present application;

FIG. 5 is a schematic diagram illustrating a time domain position result of a reference signal according to an example of the present application;

fig. 6 is a flowchart of a second method for signal transmission according to an embodiment of the present application;

fig. 7 is a flowchart of a third signal transmission method according to an embodiment of the present application;

FIG. 8 is a physical structure diagram of a reference signal according to an example of application of the present application;

FIG. 9 is a schematic diagram of a physical structure of an application example two reference signals of the present application;

fig. 10 is a schematic diagram illustrating a mapping relationship between a reference signal and a PSCCH according to an application example of the present application;

fig. 11 is a schematic diagram of a physical structure of a reference signal of an application example cross-slot of the present application;

fig. 12 is a schematic diagram illustrating a mapping relationship between physical side link shared channel (PSCCH) resources and PSCCHs according to an application example of the present application;

fig. 13 is a schematic structural diagram of a signal transmission device according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of another signal transmission device according to an embodiment of the present application;

Fig. 15 is a schematic structural diagram of a first terminal according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of a second terminal according to an embodiment of the present application;

fig. 17 is a schematic structural diagram of a signal transmission system according to an embodiment of the present application.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings and examples.

In the related art, in a new air interface (NR) system, in positioning based on Downlink (DL) Positioning Reference Signal (PRS) measurement, DL PRS resources occupy a plurality of consecutive resources (english may be expressed as symbol) in a time domain, and support multiplexing of a plurality of resources on different Resource Elements (REs) in a comb (english may be expressed as comb) manner in a frequency domain; and, periodic transmissions are made at resource set level granularity (resource set level).

The relative RE offset of DL PRS on adjacent symbols (english may be expressed as symbol) may be predefined (as shown in table 1), and a grid (english may be expressed as statignering) mapping structure is adopted to avoid ambiguity of timing estimation, and at the same time, a transmission power increasing operation can be performed, and the Comb size (english may be expressed as symbol size) determines how many UEs can perform RE granularity (RE-level) multiplexing on the same time-frequency resource.

	2symbols	4symbols	6symbols	12symbols
					Comb-2	{0,1}	{0,1,0,1}	{0,1,0,1,0,1}	{0,1,0,1,0,1,0,1,0,1,0,1}
Comb-4	NA	{0,2,1,3}	NA	{0,2,1,3,0,2,1,3,0,2,1,3}
					Comb-6	NA	NA	{0,3,1,4,2,5}	{0,3,1,4,2,5,0,3,1,4,2,5}
Comb-12	NA	NA	NA	{0,6,3,9,1,7,4,10,2,8,5,11}

TABLE 1

Of course, in the NR system, positioning based on uplink channel Sounding Reference Signal (SRS) measurement may also be supported.

In the SL mode 2 operation mode (i.e., the UE autonomously selects resources by means of a sensing mechanism), as shown in fig. 1, the UE performs resource selection within a selection window (selection window) based on a detection result in the sensing window (sensing window) with single-slot candidate resources as granularity, and the selected multiple resources are used for primary transmission and retransmission transmission of the same Transport Block (TB). In order to avoid resource collision, as shown in fig. 1, resources used for subsequent transmission may be reserved in SL Control Information (SCI) carried in PSCCH, where the UE needs to exclude candidate resources in the sending window that overlap with detected other UE SCI indicating reserved resources in the selection window if a condition is met.

During the transmission of DL PRS, a positioning management function (LMF)/gNB coordinates PRS resources for positioning. However, during transmission of the SL PRS, when the UE is operating in mode 2, if the transmission of the PRS is independent, i.e., the PRS does not have the corresponding control information indicating reservation, resource collision of the PRS may occur; specifically, as shown in fig. 2, since resources of PRS between UEs are multiplexed at RE granularity, resource collision of PRD between UEs is at RE granularity as shown in fig. 3.

Based on this, in various embodiments of the present application, the resources of the PRS are indicated by the corresponding PSCCH, in which case the PSCCH is mapped to the resources of the PRS to avoid performing additional resource exclusion procedures on the PSCCH.

An embodiment of the present application provides a signal transmission method, which is applied to a first terminal, as shown in fig. 4, and includes:

step 401: determining a second resource of the PSCCH in a time unit according to a first resource of a reference signal for SL positioning in the time unit;

step 402: and transmitting the reference signal through the first resource and transmitting the PSCCH through the second resource.

In practical application, the terminal may be referred to as UE, or may be referred to as a user. The reference signal for SL positioning may include PRS, which is not limited in the embodiment of the present application as long as the function thereof is implemented. The signal may also be referred to as a channel, and the embodiments of the present application are not limited thereto, as long as the functions thereof are implemented.

The first resource is a resource of a reference signal for SL within one time unit, and the first resource may include at least one of:

time domain resources;

Frequency domain resources;

comb tooth size;

the comb teeth are offset.

Accordingly, the second resource is a resource of the PSCCH within the above time unit.

In the embodiment of the application, the indication information in the PSCCH can indicate resources of PRS.

The size of one time unit may be set as required, for example, set to at least one time slot, or may be set to a plurality of symbols in one time slot, which is not limited in the embodiment of the present application.

In practical application, before step 401, the first terminal needs to determine the first resource, and when the first terminal is in the SL mode 2 working mode, the first terminal selects the resource of the reference signal based on a sensing mechanism.

In the process of selecting the reference signal resource based on the sensing mechanism, the first terminal can determine the first resource according to the requirement. Illustratively, as shown in fig. 5, it is assumed that a time unit contains a time slot, and the first symbol of the time slot (i.e., an Orthogonal Frequency Division Multiplexing (OFDM) symbol (OS) # 0) is used for Automatic Gain Control (AGC), and the transmitted channel and/or signal is identical to the channel and/or signal transmitted by the second symbol, that is, is a replica of all channels and signals transmitted by the second symbol (i.e., OS # 1). The last symbol of the slot (i.e., os#13) is used for a transceiving transition, i.e., as a guard interval (GP), in which case the first terminal may employ other symbols than the first symbol and the last symbol as a time domain resource in the first resource. For time domain resources, starting from os#1 to os#2 (of course, os#1 to os#3 may also be used, and the embodiment of the application is not limited thereto) is used to transmit the PSCCH; wherein the PSCCH occupies a few symbols depending on configuration information in the resource pool, such as 1, or 2, or 3 symbols, etc. When these symbols are also used to transmit the reference signal, the transmission resources of the reference signal and the resources used by the PSCCH use Frequency Division Multiplexing (FDM) technology, and the reference signal map performs a puncturing (english may be expressed as puncturing) operation on the frequency domain where the PSCCH is located.

In practical application, the comb teeth of the reference signal may be preconfigured, for example, when the reference signal occupies the whole resource pool or BWP bandwidth, the comb teeth may be configured based on the granularity of the resource pool; of course, the first terminal may also determine the comb size included in the first resource through the above-mentioned resource selection process, for example, when the reference signal does not occupy the whole resource pool or BWP bandwidth, the comb size may be determined through the resource selection process.

Through the above resource selection process, the first terminal may determine the comb offset of the first resource.

It should be noted that, in the embodiment of the present application, a specific process for determining the first resource is not limited.

As can be seen from the above description, in an embodiment, the first resource may comprise at least one of:

time domain resources;

frequency domain resources;

comb size (english may be expressed as comb size);

comb offset (english may be expressed as offset).

In step 401, in practical application, the time domain resources of the reference signal and the time domain resources of the PSCCH may not overlap completely, i.e. the first time domain resources included in the first resources are different from the second time domain resources included in the second resources.

The time domain resources of the reference signal and the time domain resources of the PSCCH may also overlap, i.e. the second time domain resources comprised by the second resources are a subset of the first time domain resources comprised by the first resources, in which case, in order to ensure transmission of the reference signal and the PSCCH, the first frequency domain resources comprised by the first resources need to be different from the second frequency domain resources comprised by the second resources, i.e. the reference signal and the PSCCH are transmitted in an FDM mode.

In actual application, the first terminal determines the second time domain resource according to the first time domain resource, namely, the second time domain resource is associated with the first time domain resource; specifically, the PSCCH may occupy the first several sub-time units of the reference signal, and the second time domain resource includes the first N sub-time units of the first time domain resource, where N is an integer greater than or equal to 1. The value of N may be determined according to needs, for example, according to the configuration information of the BWP or the resource pool of the reference signal. Illustratively, as shown in fig. 5, the PSCCH occupies the first two or three symbols of the reference signal, that is, the first terminal determines, according to the time domain resource of the reference signal, that the time domain resource of the PSCCH is in the first few symbols of the same slot as the reference signal.

Here, the sizes of the time units are different, and the corresponding sub-time units are also different.

And when the reference signal is also sent on the second time domain resource, the reference signal mapping performs a puncturing operation on the frequency domain range where the PSCCH is located, namely, the first frequency domain resource is in the second frequency domain resource range in the subset. That is, the resource locations of the reference signals are punctured on the PSCCH time domain resources on the frequency domain resources occupied by the PSCCH, such as Physical Resource Blocks (PRBs).

In an embodiment, the second frequency domain resource is determined according to a comb size and/or a comb offset of the first resource.

Specifically, the size of the second frequency domain resource may be determined according to the comb tooth size of the first resource, i.e. the size of the second frequency domain resource is associated with the comb tooth size of the first resource. The first terminal may determine the size of the second frequency domain resource according to the number of PSCCH PRBs (may also be referred to as a PRB set) in the bandwidth of the reference signal (such as a resource pool (english may be expressed as a resource pool) or a SL-BWP bandwidth) and the comb size of the first resource, for example, assuming that the number of PSCCH PRBs in the bandwidth of the reference signal is M _PRB The comb teeth have a size of N _comb And there is only one candidate position for transmitting the reference signal in one time unit, the number of PRBs occupied by the PSCCH may beWherein (1)>Representing a rounding down.

Of course, in practical application, M can be preconfigured _PSCCH A number of PRBs as the second frequency domain resource size, but M is required to be guaranteed _PSCCH Multiplied by N _Comb The result is less than or equal to M _PRB . Also can not be pre-configured with M _PSCCH The second frequency domain resource size may be defaulted to the number of PRBs in the bandwidth, and may be limited to a single sub-channel (english may be expressed as sub-channel), where M is needed _subchannel Multiplied by N _Comb Less than or equal to the bandwidth of the reference signal.

From the comb offset of the first resource, an identification (such as an index (english may be expressed as index)) of the second frequency domain resource, that is, a position of the second frequency domain resource in the candidate resources on the frequency domain range may be determined, which may also be referred to as a position of the second frequency domain resource. That is, the identifier of the second frequency domain resource is associated with the comb teeth offset of the first resource, and specifically, the identifier of the second frequency domain resource corresponding to the comb teeth offset may be determined according to a corresponding relationship (may also be referred to as a mapping relationship, and the name is not limited in the embodiment of the present application). Illustratively, there is a mapping relationship between the index of the PSCCH over the frequency domain and the comb offset of the reference signal, e.g., the index has the same value as the comb offset, i.e., the PSCCH is in one-to-one correspondence with the different comb offsets.

In practical application, the corresponding relationship may be predefined, or the network side configures the corresponding relationship for the first terminal, which is not limited in this embodiment of the present application.

As can be seen from the above description, the specific usage resource of the PSCCH (i.e. the location of the PSCCH) is a PSCCH resource corresponding to the value (which may also be understood as a number, an index, etc. and this embodiment of the present application is not limited to this) of the comb offset of the first resource. Specifically, when PRS occupies the entire bandwidth, among the candidate resources of PSCCH, different PSCCH resources are distinguished by two dimensions of { slot, comb offset }, and when PRS does not occupy the entire bandwidth, different PSCCH resources are distinguished by three dimensions of { slot, subchannel or PRB, comb offset }.

Correspondingly, the embodiment of the application also provides a signal transmission method, which is applied to the second terminal, as shown in fig. 6, and includes:

step 601: receiving a PSCCH on a second resource within a time cell;

step 602: determining a first resource of a reference signal for SL positioning in the time unit according to the second resource;

step 603: the reference signal is received on the first resource.

The first terminal is a transmitting terminal, and the second terminal is a receiving terminal.

In step 601, for the second terminal, a second resource of the PSCCH is determined before blind detection of the PSCCH. The specific processing procedure of the second terminal to determine the second resource may be understood with reference to the related art, which is not limited in the embodiments of the present application.

In step 602, the second terminal may determine that the second terminal is a target terminal according to a destination identifier (such as an ID) included in the PSCCH, that is, it is determined that the detected PSCCH is directed to the second terminal, and the second terminal is a target receiving terminal (which may also be referred to as a target measurement terminal).

For the second terminal, the comb size of the first resource of the reference signal may be indicated by a field (english may be expressed as field) in the PSCCH, or may be preconfigured, etc.

The time domain resources comprised by the first resource of the reference signal may be indicated by the resource reservation information indicated in the detected PSCCH.

The first frequency domain resource size included in the first resource of the reference signal may be dynamically indicated by SCI (for example, the reference signal does not occupy the entire bandwidth of the resource pool), or may be preconfigured in the resource pool (for example, the reference signal occupies the entire bandwidth of the resource pool), or the like.

The second terminal needs to determine the comb offset of the first resource according to the identifier (may specifically be an index) of the second frequency domain resource, that is, determine the comb offset of the first resource according to the position of the second frequency domain resource. Specifically, the comb offset of the first resource corresponding to the second frequency domain resource identifier may be determined according to the correspondence between the frequency domain resource identifier and the comb offset. Illustratively, the PSCCH is stored in a mapping relationship between indexes and comb offsets over a frequency domain range, e.g., the values of the indexes are the same as the values of the comb offsets, i.e., the PSCCH is in one-to-one correspondence with different comb offsets. Different comb offsets correspond to different PRS resources. That is, after the size is determined, the different PRS resources are differentiated in two dimensions { time slot, comb offset }, and after the time slot is determined, the second terminal can learn which PRS resource is transmitted to the second terminal according to the comb offset.

The embodiment of the application further provides a signal transmission method, as shown in fig. 7, which includes:

Step 701: the first terminal determines a second resource of the PSCCH in a time unit according to a first resource of a reference signal for SL positioning in the time unit;

step 702: the first terminal sends the reference signal through the first resource and sends the PSCCH through the second resource;

step 703: the second terminal receiving the PSCCH on the second resource; and determining the first resource of the reference signal according to the second resource;

step 704: the second terminal receives the reference signal on the first resource.

Here, it should be noted that: specific processing procedures of the first terminal and the second terminal are described in detail above, and are not described herein.

According to the signal transmission method provided by the embodiment of the application, a first terminal determines a second resource of a PSCCH in a time unit according to a first resource of a reference signal for SL positioning in the time unit; the second terminal receiving the PSCCH on the second resource; and determining the first resource of the reference signal according to the second resource; the reference signal is received on the first resource. According to the scheme provided by the embodiment of the application, under the condition that the resources of the reference signals for SL positioning are indicated by the corresponding PSCCH, the PSCCH and the resources of the reference signals for SL positioning are established in a mapping relation, and the PSCCH resources are directly determined according to the mapping relation, so that the additional process of eliminating the resources of the PSCCH can be avoided on the basis that the terminal selects and reserves the resources of the reference signals for SL positioning, and the resources are saved.

The present application is described in further detail below in connection with application examples.

In an application example, the reference signal used for SL positioning is SL-PRS, which is abbreviated as PRS in the following description.

Application example one

In this application example, one time unit is one slot, and there is one candidate position for transmitting PRS in each slot. In order to improve positioning accuracy, the PRS bandwidth is a resource pool bandwidth or a SL-BWP bandwidth. The comb size of PRS is configured with resource pool granularity (english may be expressed as per resource pool).

After determining the resources of the PRS, the resources of the PSCCH are determined according to the following manner:

(1) Frequency domain size occupied by PSCCH

Determining the size of a frequency domain occupied by the PSCCH according to the size of comb teeth of the PRS; specifically, the number of PRBs occupied by PSCCH may be:may also be preconfigured as M _PSCCH The PRBs need to guarantee M _PSCCH Multiplied by N _Comb Less than or equal to M _PRB The default may be the number of PRBs in the resource pool or BWP, or the PSCCH may be limited to a single subchannel (english may be expressed as sub-channel), where M is needed _subchannel Multiplied by N _Comb Less than or equal to the bandwidth of the resource pool or BWP.

Wherein M is _PRB A PSCCH PRB set (set) configured for resource pool or BWP, N _comb Representing PRSComb tooth size.

(2) Resource location of PSCCH

Candidate resource set position for PSCCH: the PSCCH is mapped on the 2 nd to 3 rd or 4 th symbol, numbered and up-mapped starting from the lowest PRB index within the resource pool or BWP, or still numbered and up-mapped in sub-channels starting from the lowest PRB of each sub-channel.

The number of symbols sl-StartSymbol occupied by PRS and the specific positions sl-LengthSymbols are: in the conforming set in the slot, the remaining symbols after the symbols for AGC, PSCCH and GP are removed, or the remaining symbols after the symbols for AGC and GP are removed, where the PRBs occupied on the PSCCH symbols are punctured.

Determining the frequency domain resource position of the PSCCH according to the comb tooth offset of the PRS; as shown in fig. 8, in this application example, the mapping relationship between PSCCH resources and PRS resources includes: the PSCCH has a mapping relationship between the index on the frequency domain and the comb offset of PRS, as shown in fig. 8, in this application example, the index of PSCCH is from 0 to 5, and the index of PSCCH is from 0 to N _Comb -1, i.e. the index of the PSCCH is equal to the value of the corresponding comb offset, so that a one-to-one correspondence of PSCCH to different comb offsets is achieved. Wherein N is _Comb ＝6。

After determining the resources of the PSCCH according to the resources of the PRS, the transmitting terminal UE transmits the PRS and the PSCCH by using the corresponding resources.

As can be seen from the above description, after the resources of the PRS are selected through the resource selection procedure, the resources of the PSCCH are determined according to the resources of the PRS.

For the receiving UE, if the PSCCH is detected on the corresponding resource, all information about the positioning reference signal resource can be obtained by the above mapping relationship (specifically, the mapping relationship may include the mapping relationship between the index of the PSCCH on the frequency domain and the comb offset of the PRS): including which symbols are specifically occupied, the bandwidth, and the comb size and comb offset employed. Wherein, the time domain resource of the PRS can be determined according to the time domain resource of the PSCCH, and in this application example, the frequency domain resource of the PRS is configured according to a resource pool or BWP bandwidth; in practical application, when the PRS frequency domain resource does not occupy the whole bandwidth, the PRS frequency domain resource can be dynamically indicated through the SCI. Accordingly, the comb size is either resource pool or BWP preconfigured (e.g., PRS resources occupy the entire bandwidth), or may be indicated by the field in the PSCCH (PRS resources do not occupy the entire bandwidth). That is, for a receiving UE, the manner in which PRS resources are acquired may be that the frequency domain resources of PRS may be preconfigured or indicated by the domain in the PSCCH.

The receiving end UE obtains a target receiving or measuring UE which is the current PRS according to the destination ID contained in the PSCCH, and then receives and measures the PRS on the corresponding resource.

If the receiving UE performs the resource selection procedure for transmitting PRS, the PRS resources obtained according to the corresponding mapping relationship may be excluded from the candidate resources by using the detected corresponding time slot indicated by the resource reservation information indicated in the PSCCH, that is, the candidate resources from which the PRS resources are excluded are used to perform resource selection for transmitting PRS.

Application example two

In this application example, one time unit is a time slot, and there are a plurality of (assumed to be K) candidate positions for PRS transmission in each time slot, where the value of K is 2 in this application example. In order to improve positioning accuracy, the PRS bandwidth is a resource pool bandwidth or a SL-BWP bandwidth. The comb size of PRS is configured with resource pool granularity (english may be expressed as per resource pool).

(1) Frequency domain size occupied by PSCCH

Determining the size of a frequency domain occupied by the PSCCH according to the size of comb teeth of the PRS; specifically, the number of PRBs occupied by PSCCH may be: May also be preconfigured as M _PSCCH The PRBs need to guarantee M _PSCCH Multiplied by N _Comb Less than or equal to K.M _PRB The number of PRBs in the resource pool or BWP can be defaulted, and the PSCCH can be limited to a single PSCCHWithin a subchannel, where M is needed _subchannel Multiplied by K.N _Comb Less than or equal to the bandwidth of the resource pool or BWP.

Wherein M is _PRB A PSCCH PRB set (set) configured for resource pool or BWP, N _comb The comb size of PRS is indicated.

(2) Resource location of PSCCH

Determining the frequency domain resource position of the PSCCH according to the comb tooth offset of the PRS; as shown in fig. 9, in this application example, the mapping relationship between PSCCH resources and PRS resources includes: the PSCCH has a mapping relation between the index of the frequency domain and the comb offset of PRS, as shown in FIG. 9, in the present application example, the index of PSCCH is from 0 to 7, and the index of PSCCH is from 0 to 2N _Comb -1, thereby achieving a one-to-one correspondence of PSCCH to different comb offsets. Wherein N is _Comb ＝4。

For the receiving UE, if the PSCCH is detected on the corresponding resource, all information about the positioning reference signal resource can be obtained by the above mapping relationship (specifically, the mapping relationship may include the mapping relationship between the index of the PSCCH on the frequency domain and the comb offset of the PRS): including which symbols are specifically occupied, the bandwidth, and the comb size and comb offset employed. The receiving UE may map the index of the PSCCH on the frequency domain to the time domain position of the PRS, that is, may determine the time domain position of the PRS according to the frequency domain index of the PSCCH. Specifically, according to the index and combining the 2 candidate positions of the PRS, the time domain position of the PRS may be obtained. Illustratively, if the index of the PSCCH is 3, then the time domain position of the corresponding PRS is a PRS resource with a comb offset of 3 for the first candidate resource position, and if the index of the PSCCH is 5, then the time domain position of the corresponding PRS is a PRS resource with a comb offset of 1 for the second candidate resource position. In this application example, the frequency domain resources of PRS are configured according to a resource pool or BWP bandwidth; in practical application, when the PRS frequency domain resource does not occupy the whole bandwidth, the PRS frequency domain resource can be dynamically indicated through the SCI. The comb size is either a resource pool or BWP pre-configured (e.g., PRS resources occupy the entire bandwidth) or may be indicated by a field in the PSCCH (PRS resources do not occupy the entire bandwidth). That is, for a receiving UE, the manner in which PRS resources are acquired may be that the frequency domain resources of PRS may be preconfigured or indicated by the domain in the PSCCH.

The receiving end UE obtains a target receiving or measuring UE which is the current PRS according to the destination ID contained in the PSCCH, and then receives and measures the PRS on the corresponding resource. If the receiving UE performs the resource selection procedure for transmitting PRS, the PRS resources obtained according to the corresponding mapping relationship may be excluded from the candidate resources by using the detected corresponding time slot indicated by the resource reservation information indicated in the PSCCH, that is, the candidate resources from which the PRS resources are excluded are used to perform resource selection for transmitting PRS.

In the application examples one and two, the bandwidth of the PRS is the bandwidth of the resource pool or BWP, and in the application example, as shown in fig. 10, the bandwidth of the PRS is one sub-bandwidth (english may be expressed as sub-band), that is, the mapping of PRS resources and PSCCH resources is performed for each sub-bandwidth (english may be expressed as per sub-band). The mapping scheme may employ a scheme of applying example one or example two.

In the first and second application examples, one time unit is a time slot, that is, the PSCCH and PRS are located in the same time slot, and the PSCCH and PRS may also be located in different time slots in the time domain, as shown in fig. 11, where PSCCH is located in time slot #0, and PRS is located in time slot #1, that is, one time unit may be a plurality of time slots, that is, a separate PSCCH design manner is supported (english may be expressed as a stand alone); in this case, the PSCCH may occupy symbols 1 to 3 or 1 to 4 of the corresponding slot and may be used to transmit the PSCCH or to transmit the PSCCH and the pscsch carrying the 2nd SCI on the remaining resources in the slot; the interval between the time slot in which the PRS is located and the time slot in which the current PSCCH is located may be indicated by indication information contained in the 1st SCI in the PSCCH. In the slot in which the PRS is located, the PRS may be mapped on other symbols than those used for AGC and GP. The frequency domain mapping scheme may employ a scheme to which example one or example two is applied.

As shown in fig. 12, the PSSCH resource carrying the 2nd SCI may also establish a mapping relationship with the PSCCH, where the mapping relationship may be: if PSCCH mapping is in the single-channel resource, PSSCH carrying 2nd SCI carries out resource mapping on sub-channel where PSCCH is located; if the PSCCH is not mapped in a single sub-channel, then N is additionally required _PSCCH The sub-channels are used for bearing 2nd SCI, and the starting position of the frequency domain where the sub-channels are located can be the sub-channels corresponding to the index of the sub-channel where the last PRB occupied by the PSCCH is located after being added with 1. And if the corresponding PSCCH is detected, further indication information is obtained through the 2nd SCI carried in the PSSCH in the sub-channel and is used for receiving and measuring the reference signal. The mapping relationship shown in fig. 12 is a one-to-one correspondence relationship.

As can be seen from the above description, in the scheme of the embodiment of the present application, resources of PRS are indicated by PSCCH, so that collision of transmission resources between reference signals for SL positioning can be avoided. By the mapping relation between PRS and PSCCH resources, on the basis of the resource selection and reservation process of PRS by UE, the resource elimination process of PSCCH resources is avoided, namely, the PSCCH resources can be determined without additionally carrying out the resource elimination process of PSCCH resources, and the calculation resources are saved.

In order to implement the method at the first terminal side in the embodiment of the present application, the embodiment of the present application further provides a signal transmission device, which is disposed on the first terminal, as shown in fig. 13, and the device includes:

a first determining unit 1301 configured to determine a second resource of the PSCCH in a time unit according to a first resource of a reference signal for SL positioning in the time unit;

a transmitting unit 1302, configured to transmit the reference signal through the first resource and transmit the PSCCH through the second resource.

In an embodiment, the first determining unit 1301 is further configured to determine the first resource.

In an embodiment, the second time domain resources included in the second resources are a subset of the first time domain resources included in the first resources, and the first frequency domain resources included in the first resources are different from the second frequency domain resources included in the second resources.

In an embodiment, the first determining unit 1301 is configured to determine the second frequency domain resource according to a comb size and/or a comb offset of the first resource.

In an embodiment, the first determining unit 1301 is configured to determine the size of the second frequency domain resource according to the comb tooth size of the first resource.

In an embodiment, the first determining unit 1301 is configured to determine the index of the second frequency domain resource according to the comb offset of the first resource.

In practical applications, the first determining unit 1301 may be implemented by a processor in a signal transmission apparatus, and the transmitting unit 1302 may be implemented by a communication interface in the signal transmission apparatus.

In order to implement the method at the second terminal side in the embodiment of the present application, the embodiment of the present application further provides a signal transmission device, which is disposed on the second terminal, as shown in fig. 14, and the device includes:

a first receiving unit 1401 for receiving a PSCCH on a second resource within a time unit;

a second determining unit 1402, configured to determine, according to the second resource, a first resource of a reference signal for SL positioning within the time unit;

a second receiving unit 1403 is configured to receive the reference signal on the first resource.

In an embodiment, the second determining unit 1402 is configured to determine the comb offset of the first resource according to the index of the second frequency domain resource.

In practical applications, the first receiving unit 1401 and the second receiving unit 1403 may be implemented by a communication interface in a signal transmission apparatus, and the second determining unit 1402 may be implemented by a processor in the signal transmission apparatus.

It should be noted that: in the signal transmission device provided in the above embodiment, only the division of each program module is used for illustration, and in practical application, the processing allocation may be performed by different program modules according to needs, that is, the internal structure of the device is divided into different program modules, so as to complete all or part of the processing described above. In addition, the signal transmission device and the signal transmission method provided in the foregoing embodiments belong to the same concept, and specific implementation processes thereof are detailed in the method embodiments and are not described herein again.

Based on the hardware implementation of the program modules, and in order to implement the method at the terminal side in the embodiment of the present application, the embodiment of the present application further provides a first terminal, as shown in fig. 15, where the first terminal 1500 includes:

a first communication interface 1501 capable of information interaction with a second terminal;

a first processor 1502, connected to the first communication interface 1501, for implementing information interaction with a second terminal, and configured to execute, when executing a computer program, a method provided by one or more technical solutions on the first terminal side;

a first memory 1503, said computer program being stored on said first memory 1503.

Specifically, the first processor 1502 is configured to determine, according to a first resource of a reference signal for SL positioning within a time unit, a second resource of a PSCCH within the time unit;

the first communication interface 1501 is configured to send the reference signal via the first resource and send the PSCCH via the second resource.

Wherein, in an embodiment, the first processor 1502 is further configured to determine the first resource.

Wherein in an embodiment, the first processor 1502 is configured to determine the second frequency domain resource according to a comb size and/or a comb offset of the first resource.

In an embodiment, the first processor 1502 is configured to determine a size of the second frequency domain resource according to a comb size of the first resource.

In an embodiment, the first processor 1502 is configured to determine an index of the second frequency domain resource according to the comb offset of the first resource.

It should be noted that: the specific processing of the first communication interface 1501 and the first processor 1502 may be understood with reference to the methods described above.

Of course, in actual practice, the various components in first terminal 1500 would be coupled together by bus system 1504. It is to be appreciated that bus system 1504 is used to facilitate connection communications between these components. The bus system 1504 includes a power bus, a control bus, and a status signal bus in addition to the data bus. But for clarity of illustration, the various buses are labeled as bus system 1504 in fig. 15.

The first memory 1503 in the embodiment of the present application is used to store various types of data to support the operation of the first terminal 1500. Examples of such data include: any computer program for operating on the first terminal 1500.

The method disclosed in the embodiments of the present application may be applied to the first processor 1502 or implemented by the first processor 1502. The first processor 1502 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the method may be implemented by an integrated logic circuit of hardware in the first processor 1502 or by instructions in software. The first processor 1502 described above may be a general purpose processor, a digital signal processor (DSP, digital Signal Processor), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The first processor 1502 may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present application. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly embodied in a hardware decoding processor or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium located in the first memory 1503, said first processor 1502 reading the information in the first memory 1503, in combination with its hardware performing the steps of the method described above.

In an exemplary embodiment, the first terminal 1500 may be implemented by one or more application specific integrated circuits (ASIC, application Specific Integrated Circuit), DSPs, programmable logic devices (PLD, programmable Logic Device), complex programmable logic devices (CPLD, complex Programmable Logic Device), field-programmable gate arrays (FPGA, field-Programmable Gate Array), general purpose processors, controllers, microcontrollers (MCU, micro Controller Unit), microprocessors (Microprocessor), or other electronic components for performing the aforementioned methods.

Based on the hardware implementation of the program modules, and in order to implement the method on the second terminal side in the embodiment of the present application, the embodiment of the present application further provides a second terminal, as shown in fig. 16, where the second terminal 1600 includes:

a second communication interface 1601 capable of information interaction with the first terminal;

a second processor 1602, connected to the second communication interface 1601, for implementing information interaction with the first terminal, and configured to execute the method provided by one or more technical solutions on the second terminal side when running a computer program;

a second memory 1603, said computer program being stored on said second memory 1603.

Specifically, the second communication interface 1601 is configured to receive a PSCCH on a second resource in a time unit and receive a reference signal for SL positioning on a first resource in the time unit;

the second processor 1602 is configured to determine the first resource based on the second resource.

Wherein in an embodiment, the second processor 1602 is configured to determine the comb offset of the first resource according to the index of the second frequency domain resource.

It should be noted that: the specific processing procedure of the second communication interface 1601 and the second processor 1602 can be understood by referring to the above method.

Of course, in actual practice, the various components in second terminal 1600 are coupled together via bus system 1604. It is appreciated that the bus system 1604 is used to enable connected communications between these components. The bus system 1604 includes a power bus, a control bus, and a status signal bus in addition to the data bus. But for clarity of illustration, the various buses are labeled as bus system 1604 in fig. 16.

The second memory 1603 in the embodiment of the present application is used to store various types of data to support the operation of the second terminal 1600. Examples of such data include: any computer program for operating on second terminal 1600.

The method disclosed in the embodiments of the present application may be applied to the second processor 1602 or implemented by the second processor 1602. The second processor 1602 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the method described above may be performed by integrated logic circuits of hardware or instructions in software form in the second processor 1602. The second processor 1602 described above may be a general purpose processor, a DSP, or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The second processor 1602 may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly embodied in a hardware decoding processor or implemented by a combination of hardware and software modules in the decoding processor. The software modules may be located in a storage medium located in the second memory 1603, and the second processor 1602 reads information in the second memory 1603, in conjunction with its hardware, to perform the steps of the methods described above.

In an exemplary embodiment, second terminal 1600 may be implemented by one or more ASIC, DSP, PLD, CPLD, FPGA, general purpose processors, controllers, MCU, microprocessor, or other electronic elements for performing the foregoing methods.

It is understood that the memories (the first memory 1503 and the second memory 1603) of the embodiments of the present application may be volatile memories or nonvolatile memories, and may include both volatile memories and nonvolatile memories. Wherein the nonvolatile Memory may be Read Only Memory (ROM), programmable Read Only Memory (PROM, programmable Read-Only Memory), erasable programmable Read Only Memory (EPROM, erasable Programmable Read-Only Memory), electrically erasable programmable Read Only Memory (EEPROM, electrically Erasable Programmable Read-Only Memory), magnetic random access Memory (FRAM, ferromagnetic random access Memory), flash Memory (Flash Memory), magnetic surface Memory, optical disk, or compact disk Read Only Memory (CD-ROM, compact Disc Read-Only Memory); the magnetic surface memory may be a disk memory or a tape memory. The volatile memory may be random access memory (RAM, random Access Memory), which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as static random access memory (SRAM, static Random Access Memory), synchronous static random access memory (SSRAM, synchronous Static Random Access Memory), dynamic random access memory (DRAM, dynamic Random Access Memory), synchronous dynamic random access memory (SDRAM, synchronous Dynamic Random Access Memory), double data rate synchronous dynamic random access memory (ddr SDRAM, double Data Rate Synchronous Dynamic Random Access Memory), enhanced synchronous dynamic random access memory (ESDRAM, enhanced Synchronous Dynamic Random Access Memory), synchronous link dynamic random access memory (SLDRAM, syncLink Dynamic Random Access Memory), direct memory bus random access memory (DRRAM, direct Rambus Random Access Memory). The memory described in the embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

In order to implement the method of the embodiment of the present application, the embodiment of the present application further provides a signal transmission system, as shown in fig. 17, where the system includes: a first terminal 1701 and a second terminal 1702.

Here, it should be noted that: specific processing procedures of the first terminal 1701 and the second terminal 1702 are described in detail above, and will not be described herein.

In an exemplary embodiment, the present application further provides a storage medium, i.e. a computer storage medium, specifically a computer readable storage medium, for example, including a memory 1503 storing a computer program, where the computer program may be executed by the first processor 1502 of the first terminal 1500 to perform the steps of the foregoing first terminal side method, and further includes, for example, a memory 1603 storing a computer program, where the computer program may be executed by the second processor 1602 of the second terminal 1600 to perform the steps of the foregoing second terminal side method. The computer readable storage medium may be FRAM, ROM, PROM, EPROM, EEPROM, flash Memory, magnetic surface Memory, optical disk, or CD-ROM.

It should be noted that: "first," "second," etc. are used to distinguish similar objects and not necessarily to describe a particular order or sequence.

In addition, the embodiments described in the present application may be arbitrarily combined without any collision.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the scope of the present application.

Claims

1. A signal transmission method, applied to a first terminal, comprising:

determining a second resource of a physical side link control channel PSCCH in a time unit according to a first resource of a reference signal used for positioning a side link SL in the time unit;

2. The method of claim 1, wherein the determining the second resource of the PSCCH in a time unit based on the first resource of the reference signal for SL positioning in the time unit comprises:

3. The method of claim 2, wherein the step of determining the position of the substrate comprises,

and determining the index of the second frequency domain resource according to the comb tooth offset of the first resource.

4. The method of claim 2, wherein the step of determining the position of the substrate comprises,

And determining the size of the second frequency domain resource according to the comb tooth size of the first resource.

5. The method of claim 1, wherein the first resource comprises a first time domain resource that is different from a second time domain resource comprised by the second resource.

6. The method of claim 1, wherein the second time domain resources comprised by the second resources are a subset of the first time domain resources comprised by the first resources, the first frequency domain resources comprised by the first resources being different from the second frequency domain resources comprised by the second resources.

7. The method of claim 6, wherein the second time domain resource comprises the first N sub-time units of the first time domain resource, N being an integer greater than or equal to 1.

8. The method of claim 6, wherein within the subset, the first frequency domain resources are within the second frequency domain resources.

9. The method according to any one of claims 1 to 8, wherein the first resource comprises at least one of:

time domain resources;

frequency domain resources;

comb tooth size;

the comb teeth are offset.

10. A signal transmission method, applied to a second terminal, comprising:

Receiving a PSCCH on a second resource within a time cell;

the reference signal is received on the first resource.

11. The method of claim 10, wherein the determining a first resource of a reference signal for SL positioning within the time unit based on the second resource comprises:

12. The method of claim 10, wherein the first resource comprises a first time domain resource that is different from a second time domain resource comprised by the second resource.

13. The method of claim 10, wherein the second time domain resources comprised by the second resources are a subset of the first time domain resources comprised by the first resources, the first frequency domain resources comprised by the first resources being different from the second frequency domain resources comprised by the second resources.

14. The method of claim 13, wherein the second time domain resource comprises the first N sub-time units of the first time domain resource, N being an integer greater than or equal to 1.

15. The method of claim 13, wherein within the subset, the first frequency domain resources are within the second frequency domain resources.

16. The method according to any one of claims 10 to 15, wherein the first resource comprises at least one of:

time domain resources;

frequency domain resources;

comb tooth size;

the comb teeth are offset.

17. A signal transmission device, comprising:

18. A signal transmission device, comprising:

19. A first terminal, comprising:

20. A second terminal, comprising:

21. A first terminal, comprising: a first processor and a first memory for storing a computer program capable of running on the processor,

wherein the first processor is adapted to perform the steps of the method of any of claims 1 to 9 when the computer program is run.

22. A second terminal, comprising: a second processor and a second memory for storing a computer program capable of running on the processor,

wherein the second processor is adapted to perform the steps of the method of any of claims 10 to 16 when the computer program is run.

23. A storage medium having stored thereon a computer program, which when executed by a processor, performs the steps of the method of any of claims 1 to 9 or performs the steps of the method of any of claims 10 to 16.