WO2022188508A1

WO2022188508A1 - Sidelink synchronization signal block transmission method and apparatus, and computer-readable storage medium

Info

Publication number: WO2022188508A1
Application number: PCT/CN2021/140440
Authority: WO
Inventors: 沈兴亚
Original assignee: 展讯通信（上海）有限公司
Priority date: 2021-03-12
Filing date: 2021-12-22
Publication date: 2022-09-15
Also published as: CN115087103A

Abstract

A sidelink synchronization signal block transmission method and apparatus, and a computer-readable storage medium. A sidelink synchronization signal block comprises first portion data and second portion data. The method comprises: continuously mapping the first portion data to a physical resource block of sidelink resources in a frequency domain; mapping the second portion data to spare resources according to an interleaving priority order, the spare resources being resources in the sidelink resources in which no first portion data is not mapped; and using the sidelink resources to transmit the sidelink synchronization signal block. By means of the solution of the present invention, the problem that an OCB requirement cannot be met when a sidelink synchronization signal block is transmitted on an unlicensed spectrum can be effectively solved, and the problem of power limitation can be further solved.

Description

Direct link synchronization signal block transmission method and device, and computer-readable storage medium

This application claims the priority of the Chinese patent application filed on March 12, 2021, with the application number of 202110271896.7 and the invention titled "Direct Link Synchronization Signal Block Transmission Method and Device, Computer-readable Storage Medium", which The entire contents of this application are incorporated by reference.

technical field

The present invention relates to the field of communication technologies, and in particular, to a method and device for transmitting a synchronization signal block of a direct link, and a computer-readable storage medium.

Background technique

In the time domain, the direct link terminal sends or receives the direct link physical broadcast channel (PSBCH, Physical Sidelink Broadcast Channel Block), the direct link primary synchronization signal (PSS, Primary Synchronization Signal) and the direct link on consecutive symbols. Link Secondary Synchronization Signal (SSS, Second Synchronization Signal). These direct link physical broadcast channels, direct link primary synchronization signals and direct link secondary synchronization signals constitute a direct link synchronization signal transmission block (S-SS/PSBCH block, Sidelink synchronization signal/physical sidelink broadcast channel block, referred to as the direct link synchronization signal block, SL-SSB).

On the other hand, the Occupied Channel Bandwidth (OCB for short) requirement, such as 80% bandwidth requirement, needs to be met when data transmission is performed on the unlicensed spectrum. According to the existing protocol, SL-SSB occupies 11 Physical Resource Blocks (PRBs) in the frequency domain, and the bandwidth of Listen Before Talk (LBT) is 20 MHz (MHz) contains 100 PRBs in total. Obviously, the existing SL-SSB structure does not meet the OCB requirement when transmitting on unlicensed spectrum.

In addition, there is a power spectral density (Power Spectral Density, PSD for short) limit on the unlicensed spectrum, such as 13 decibels per megahertz (dB/MHz). For 15 kilohertz (KHz) subcarrier spacing, the maximum transmit power of 11 PRBs is about 16 decibel milliwatts (dBm); for 30KHz subcarrier spacing, the maximum transmit power of 11 PRBs is about 19dBm; for 60KHz With subcarrier spacing, the maximum transmit power of 11 PRBs is about 22dBm.

To sum up, according to the prior art, the OCB requirement cannot be met when the direct link synchronization information block is transmitted on the unlicensed spectrum, and the transmission power is also limited.

SUMMARY OF THE INVENTION

The technical problem solved by the present invention is how to solve the problem that the direct link synchronization signal block cannot meet the OCB requirement and the transmission power is also limited when it is transmitted on the unlicensed spectrum.

In order to solve the above technical problem, an embodiment of the present invention provides a method for transmitting a synchronization signal block of a direct connection link, where the synchronization signal block of a direct connection link includes a first part of data and a second part of data, and the method includes: The first part of the data is continuously mapped to the physical resource blocks of the direct link resources in the frequency domain; the second part of the data is mapped to the spare resources according to the order of interleaving priority, wherein the spare resources are the direct links The resource of the first part of the data is not mapped in the channel resource; the direct link synchronization signal block is transmitted by using the direct link resource.

Optionally, the mapping of the second part of data to the spare resources according to the order of interleaving priority includes: determining the starting position of the spare resources according to the cell identifier; according to the interleaving index number from high to low or from low to high sequence, the second part of data is mapped to the spare resource from the starting position.

Optionally, the determining the starting position of the spare resource according to the cell identifier includes: determining the starting position according to the result of taking the modulo of the cell identifier and the total number of interlaces.

Optionally, the interleaving index numbers are in one-to-one correspondence with interleaving resources, a plurality of physical resource blocks included in the interleaving resources are discretely distributed in the frequency domain, and the spare resources include n interleaving resources, where n is greater than or equal to A positive integer of 2.

Optionally, the mapping of the second part of data to the vacant resources from the starting position in the order of the interleaving index numbers from high to low or from low to high includes: ascending the interleaving index numbers from high to high. In an order from low to low or from low to high, the second partial data is mapped to all physical resource blocks of the n-1 interleaving resources and a part of the physical resource blocks of the n-th interleaving resource from the starting position.

Optionally, the partial PRB of the nth interleaving resource is selected from: the physical resource block with the smallest identification in the nth interleaving resource, the physical resource block with the largest identification in the nth interleaving resource, and the physical resource block in the nth interleaving resource. A preset physical resource block in the n interleaved resources, where the preset physical resource block is configured by higher layer signaling.

Optionally, in the frequency domain, the number of physical resource blocks occupied by the first part of the data on the direct link resources is equal to the number of physical resource blocks occupied by the second part of the data on the direct link resources. quantity.

Optionally, the mapping of the second part of data to the vacant resources from the starting position in the order of the interleaving index numbers from high to low or from low to high includes: ascending the interleaving index numbers from high to high. The second part of data is mapped to all physical resource blocks of the n interleaved resources starting from the starting position in order from low to low or from low to high.

Optionally, in the frequency domain, the number of physical resource blocks occupied by the first part of the data on the direct link resources is different from the number of physical resources occupied by the second part of the data on the direct link resources. number of blocks.

Optionally, the spare resources are obtained through high-layer signaling configuration or pre-definition.

Optionally, the continuously and repeatedly mapping the first part of data to the physical resource block of the direct link resource in the frequency domain includes: continuously and repeatedly mapping the first part of the data to the direct link resource in the frequency domain. The physical resource block of link resources.

Optionally, the number of times of repeated mapping of the first part of the data is negatively correlated with the subcarrier spacing of the direct link resource.

Optionally, the continuously and repeatedly mapping the first part of the data to the physical resource block of the direct link resource in the frequency domain includes: occupying the direct link resource with a single first part of data. The unit of physical resource blocks is as a unit, and the first part of the data is continuously mapped to the physical resource blocks of the direct link resource repeatedly.

Optionally, the frequency domain starting position of the first part of the data on the direct link resource is indicated by high-level signaling, and the high-level signaling includes the first part of the data on the direct link resource. The center frequency point of the occupied physical resource block or the frequency point that identifies the smallest subcarrier.

Optionally, the continuously and repeatedly mapping the first part of the data to the physical resource block of the direct link resource in the frequency domain includes: using a single first part of data as a unit, repeatedly mapping the first part of the data to the physical resource block of the direct link resource. Data is mapped to physical resource blocks of the direct link resources.

Optionally, the starting position in the frequency domain of the first part of the data on the direct link resource is indicated by high layer signaling.

Optionally, the first part of the data includes multiple direct link primary synchronization signal sequences and multiple secondary synchronization signal sequences, and the sequence length of the first part of the data is greater than the sequence length of a single direct link primary synchronization signal sequence Sum of sequence lengths with a single secondary synchronization signal sequence.

Optionally, the sequence length of the first part of the data is negatively correlated with the subcarrier spacing.

In order to solve the above technical problem, an embodiment of the present invention further provides a direct link synchronization signal block transmission device, the direct link synchronization signal block includes a first part of data and a second part of data, and the device includes: a first The mapping module is used for continuously mapping the first part of the data to the physical resource blocks of the direct link resources in the frequency domain; the second mapping module is used for mapping the second part of the data to the Spare resources, wherein the spare resources are resources in the direct link resources to which the first part of the data is not mapped; a transmission module, configured to transmit the direct link synchronization signal by using the direct link resources piece.

In order to solve the above technical problems, embodiments of the present invention further provide a computer-readable storage medium, where the computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, and a computer program is stored thereon. The steps of the above-described methods are performed when the computer program is executed by the processor.

In order to solve the above technical problem, an embodiment of the present invention further provides a direct-link synchronization signal block transmission device, which includes a memory and a processor, the memory stores a computer program that can run on the processor, and the The processor executes the steps of the above-described method when the computer program is executed.

Compared with the prior art, the technical solutions of the embodiments of the present invention have the following beneficial effects:

An embodiment of the present invention provides a method for transmitting a synchronization signal block of a direct link, where the synchronization signal block of a direct link includes a first part of data and a second part of data, and the method includes: transmitting the first part of data in a frequency domain The second part of the data is mapped to the vacant resources in the order of interleaving priority, wherein the vacant resources are all the direct link resources that are not mapped to the physical resource blocks. the resource of the first part of the data; using the direct link resource to transmit the direct link synchronization signal block.

Compared with the direct link synchronization signal block structure used in the existing transmission, the present embodiment adopts different resource mapping methods for the transmission of the two parts of data. Specifically, the second part of the data in the direct link synchronization signal block is mapped and transmitted by using an interleaved structure, so that the redesigned direct link synchronization signal block structure in the solution of this embodiment is transmitted on the unlicensed spectrum can meet the OCB requirements. Further, the first part of the data in the direct link synchronization signal block redesigned in this embodiment is still mapped to consecutive physical resource blocks in the frequency domain, that is, mapped to the same number of physical resource blocks in consecutive interleaved resource blocks. , so as to effectively ensure that the performance of receiving the first part of the data will not be affected. Further, the first part of data may include PSS and SSS, and the second part of data may include PSBCH and its demodulation reference signal (Demodulation Reference Signal, DMRS for short).

Further, the mapping of the first part of data to the physical resource block of the direct link resource in the frequency domain continuously includes: continuously and repeatedly mapping the first part of the data to the direct link in the frequency domain The physical resource block of the road resource. Therefore, the transmit power is improved by designing the PSS and SSS to be repeatedly transmitted in the frequency domain, and the problem of power limitation when the direct link synchronization signal block is transmitted in the unlicensed spectrum is effectively solved. Therefore, by adopting this embodiment, both the OCB requirement and the transmit power can be satisfied.

Description of drawings

FIG. 1 is a flowchart of a method for transmitting a direct link synchronization signal block according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of time-frequency resources of a first typical application scenario of an embodiment of the present invention;

3 is a schematic diagram of time-frequency resources of a second typical application scenario of an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an apparatus for transmitting a synchronization signal block of a direct link according to an embodiment of the present invention.

Detailed ways

As mentioned in the background art, the OCB requirement cannot be met when the direct link synchronization information block is transmitted on the unlicensed spectrum according to the prior art, and the transmission power is also limited.

In order to solve the OCB problem when transmitting data on the unlicensed spectrum, the latest technology introduces an interlace structure in the air interface (New Radio in Unlicensed Spectrum, referred to as NR-U) working in the unlicensed frequency band.

Specifically, resources allocated in an interleaving manner (also called interleaving resource blocks or interleaving resources) are composed of physical resource blocks {m, M+m, 2M+m, 3M+m,...}, where m∈{ 0,1,…,M-1}, M is the total number of interleavings. For example, M is equal to 10 for a subcarrier spacing of 15 kHz. As another example, M is equal to 5 for a subcarrier spacing of 30 kHz.

interleaved resource block

and common physical resource blocks

The relationship between them is as follows:

in,

It is the common physical resource block starting with BWP; mod is the remainder symbol.

Through analysis, the inventor of the present application finds that for the PSS and SSS in the synchronization signal block of the direct link, if the interleaving structure is adopted, the PSS sequence and the SSS sequence will be distributed non-continuously in the frequency domain. This will degrade the performance of receiving PSS and SSS. Therefore, the PSS and SSS signals transmitted by the direct-link terminal using this embodiment do not adopt an interleaving structure. Further, the problem of limited maximum transmit power can be solved by repeatedly transmitting PSS and SSS signals.

For PSBCH and its DMRS, the use of the interleaving structure will increase the peak-to-average power ratio (PAPR for short, peak-to-average ratio), which will increase by about 1 to 2dB. This increased PAPR has little effect on performance. . Therefore, the PSBCH and its DMRS transmitted by the direct link terminal of this embodiment adopt an interleaved structure.

Based on the above analysis, in order to solve the problem that the existing direct link synchronization signal block cannot meet the OCB requirements and the power is limited when it is transmitted on the unlicensed spectrum. An embodiment of the present invention provides a method for transmitting a synchronization signal block of a direct link, where the synchronization signal block of a direct link includes a first part of data and a second part of data, and the method includes: transmitting the first part of data in a frequency domain The second part of the data is mapped to the vacant resources in the order of interleaving priority, wherein the vacant resources are all the direct link resources that are not mapped to the physical resource blocks. the resource of the first part of the data; using the direct link resource to transmit the direct link synchronization signal block.

In this embodiment, different resource mapping modes are used to transmit the two parts of data. Specifically, the second part of the data in the direct link synchronization signal block is mapped and transmitted by using an interleaved structure, so that the redesigned direct link synchronization signal block structure in the solution of this embodiment is transmitted on the unlicensed spectrum can meet the OCB requirements. Further, the first part of the data in the direct link synchronization signal block redesigned in this embodiment is still mapped to consecutive physical resource blocks in the frequency domain, that is, mapped to the same number of physical resource blocks in consecutive interleaved resource blocks. , so as to effectively ensure that the performance of receiving the first part of the data will not be affected. Further, the first part of data may include PSS and SSS, and the second part of data may include PSBCH and its demodulation reference signal (Demodulation Reference Signal, DMRS for short).

In order to make the above objects, features and beneficial effects of the present invention more clearly understood, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a flowchart of a method for transmitting a synchronization signal block of a direct link according to an embodiment of the present invention.

Specifically, the direct link may connect a transmitter (Transmitter, Tx for short) and a receiver (Receiver, Rx for short). Both the sending end and the receiving end may be user equipment (User Equipment, UE for short). Alternatively, the direct link may also be connected to a base station (gNB), and the base station sends information to the receiving end through the transmitting end. In this specific implementation, the terminals connected to the direct link are all referred to as direct link terminals.

The method of this embodiment may be executed by a directly connected terminal. Specifically, this embodiment may be implemented by a chip with a resource mapping function in a directly connected link terminal, and may also be implemented by a baseband chip in a directly connected link terminal.

Further, the direct link transmits on unlicensed spectrum.

Further, direct link resources are allocated in an interleaved manner. Wherein, an interleaving resource may be identified by an interleaving index number. Multiple physical resource blocks included in one interleaving resource can be discretely distributed in the frequency domain.

Further, through the solution of this embodiment, the direct link synchronization signal block can be transmitted by using the direct link resource. Specifically, the direct link synchronization signal block may include a first portion of data and a second portion of data, wherein the first portion of data may include PSS and SSS, and the second portion of data may include PSBCH and its DMRS.

Referring to FIG. 1 , the method for transmitting a synchronization signal block of a direct link according to this embodiment may include the following steps:

Step S101, continuously map the first part of data to physical resource blocks of direct link resources in the frequency domain;

Step S102, mapping the second part of data to spare resources according to the order of interleaving priority, wherein the spare resources are resources of the direct link resources to which the first part of data is not mapped;

Step S103, using the direct link resource to transmit the direct link synchronization signal block.

In a specific implementation, the PSS and the SSS may occupy consecutive 11 physical resource blocks, wherein the lengths of the PSS sequence and the SSS sequence are both 127. Correspondingly, in step S101, the PSS sequence and the SSS sequence may be mapped to 127 subcarriers in the 132 subcarriers corresponding to the 11 physical resource blocks of the direct link resource.

For example, referring to FIG. 2 , the first portion of data may be mapped to sub-carriers 2, 3, . . . , 127, 128 of the 132 sub-carriers in the frequency domain. Further, in the time domain, the PSS and the SSS each occupy two orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM for short) symbols in a single time slot (slot).

In FIG. 2 , the horizontal axis is the time domain, the vertical axis is the frequency domain, and a row corresponds to one physical resource block. A physical resource block includes 14 OFDM symbols from 0 to 13 in the time domain and 12 subcarriers in the frequency domain. The direct link resources in FIG. 2 are interleaved and allocated with M=10.

In a specific implementation, the step S102 may include the steps of: determining the starting position of the spare resource according to the cell identifier; starting from the starting position in the order of interleaving index numbers from high to low or from low to high The second portion of data is mapped to the spare resource.

Specifically, the direct-link terminal executing this embodiment can determine the interleaving resource used for this transmission according to the cell identifier. Wherein, the PSS and SSS transmitted this time may include cell identification related information, so that the receiver can determine the interleaving resources that carry the PSBCH and its DMRS. Alternatively, the cell identifier may refer to the cell where the direct link terminal currently resides.

Further, the starting position may be determined according to the result of taking the modulo of the cell identifier and the total number of interlaces. For example, PSBCH and its DMRS can occupy two interlace resources, correspondingly, one interlace resource occupied by the PSBCH and its DMRS can be determined by taking the modulo of the cell identifier and the total number of interlaces, and the other interlace resource is the interlace adjacent to the interlace resource. resource.

Further, in the frequency domain, the number of physical resource blocks occupied by the first part of the data on the direct link resources may be equal to the number of physical resource blocks occupied by the second part of the data on the direct link resources . For example, the PSS and the SSS occupy consecutive 11 physical resource blocks in the frequency domain, and the 11 physical resource blocks correspond to 2 interleaving resources. Correspondingly, the spare resources for carrying the PSBCH and its DMRS may also be two interleaved resources.

In a variant, the positions of all interleaving resources occupied by the second part of data may be indicated in a specific manner. Such as through high-level signaling, pre-defined and so on.

In a specific implementation, the spare resources may include n interleaved resources, where n is a positive integer greater than or equal to 2.

Specifically, the specific value of n may be determined according to the number of the closest interleaving resources that can satisfy the information bits carried in the PSBCH.

Further, when step S102 is performed, the second part of data may be mapped to all physical resources of n-1 interleaving resources from the starting position in the order of interleaving index numbers from high to low or from low to high block and part of the physical resource block of the nth interleaved resource.

Taking n=2 as an example, in conjunction with Fig. 2, the two interleaving resources marked as 0 (denoted as interleaving-0 in the figure) and the interleaving resource identified as 1 (denoted as interleaving-1 in the figure) are determined as the spare resources. Among them, all physical resource blocks in interlace-0 are used for transmitting PSBCH and its DMRS, and one physical resource block in interleaving-1 is used for transmitting PSBCH and its DMRS.

Further, the partial PRB of the n-th interleaving resource may be the physical resource block with the smallest identification in the n-th interleaving resource. The minimum identifier refers to the smallest identifier in the frequency domain. As shown in FIG. 2 , the physical resource block with the smallest identifier in the interleave-1 in the frequency domain is used to carry the PSBCH and its DMRS.

In a variation example, the partial PRBs of the n interleaved resources may be the physical resource block with the largest identification in the nth interleaved resources.

In a variant, the partial PRBs of the n interleaved resources may be preset physical resource blocks in the nth interleaved resources, and the preset physical resource blocks are configured by high-layer signaling. For example, the high-layer signaling may be Radio Resource Control (Radio Resource Control, RRC for short) signaling.

In a specific implementation, the spare resource may be configured through higher layer signaling, for example, the higher layer signaling may be RRC signaling.

Specifically, the direct link terminal receives the RRC signaling sent by the base station in advance, and obtains the spare resources for carrying the PSBCH and its DMRS therefrom.

In a variant, the spare resources may be obtained by pre-definition.

Further, for different application scenarios, different interleaving resources may be predefined as spare resources. For example, for vehicle-to-everything (V2X) scenarios, Interleave-0 and Interleave-1 can be predefined as the spare resources; for high-speed rail communication application scenarios, Interleave-4 and Interleave-4 can be predefined. Interleave-5 is used as the spare resource. The direct-link terminal implementing this embodiment may determine predefined spare resources according to the application scenario in which it is currently located.

In a specific implementation, when step S102 is performed, the second part of data may be mapped to the n interleaves starting from the starting position in the order of interleaving index numbers from high to low or from low to high All physical resource blocks of the resource.

Further, in the frequency domain, the number of physical resource blocks occupied by the first part of the data on the direct link resources may be different from the number of physical resource blocks occupied by the second part of the data on the direct link resources quantity.

For example, in the frequency domain, the PSBCH and its DMRS may not be limited to be mapped in 11 physical resource blocks, but the second part of the data may be mapped to the interleaving-0 and interleaving-1 in Figure 2 by re-rate matching of all physical resource blocks.

From the above, with this embodiment, different resource mapping modes are used for transmission of the two parts of data. Specifically, the second part of the data in the direct link synchronization signal block is mapped and transmitted by using an interleaved structure, so that the redesigned direct link synchronization signal block structure in the solution of this embodiment is transmitted on the unlicensed spectrum can meet the OCB requirements. Further, the first part of the data in the direct link synchronization signal block redesigned in this embodiment is still mapped to consecutive physical resource blocks in the frequency domain, that is, mapped to the same number of physical resource blocks in consecutive interleaved resource blocks. , so as to effectively ensure that the performance of receiving the first part of the data will not be affected.

In a specific implementation, the step S101 may include the step of: continuously and repeatedly mapping the first part of the data to the physical resource blocks of the direct link resource in the frequency domain. Therefore, the transmit power is improved by designing the PSS and SSS to be repeatedly transmitted in the frequency domain, and the problem of power limitation when the direct link synchronization signal block is transmitted in the unlicensed spectrum is effectively solved. Therefore, by adopting this embodiment, both the OCB requirement and the transmit power can be satisfied.

Specifically, the number of times of repeated mapping of the first part of the data may be negatively correlated with the subcarrier spacing of the direct link resource. Specifically, the larger the subcarrier spacing, the wider the bandwidth of a single physical resource block, and the more convenient it is to overcome the PSD limitation. Therefore, in this specific implementation, as the subcarrier interval increases, the number of repeated transmissions can be appropriately reduced to save power consumption.

For example, for a subcarrier spacing of 15kHz, PSS and SSS can be transmitted 4 times repeatedly. For another example, for a subcarrier spacing of 30 kHz, PSS and SSS may be repeatedly transmitted twice. For another example, for the subcarrier spacing of 60 kHz, the PSS and SSS do not need to be repeatedly transmitted.

In a specific implementation, when the step S101 is performed, the first part of data may be continuously mapped to the Physical resource block for direct link resources.

For example, referring to FIG. 3 , a single PSS sequence and an SSS sequence are continuously mapped to 11 physical resource blocks in the frequency domain, and are repeated in units of these 11 consecutive physical resource blocks. The sequences in every 11 physical resource blocks are mapped in the same manner, and the lengths of the PSS sequence and the SSS sequence are both 127.

Further, the frequency domain starting position of the first part of the data on the direct link resource is indicated by high-level signaling, and the high-level signaling may include that the first part of the data occupies the direct link resource. The center frequency point of the physical resource block. For example, in the order of frequency domain from low to high, the center frequency point of the first mapped 11 physical resource blocks, such as the frequency domain position of the 66th subcarrier, is configured by RRC signaling. The repeated physical resource blocks are distributed above (or below) the 11 physical resource blocks indicated by the RRC signaling in ascending order (or descending order).

In a variant, the high-layer signaling may include a frequency point of a subcarrier with the smallest identification of the physical resource block occupied by the first part of the data on the direct link resource. For example, the frequency point of the subcarrier with the smallest identification in the first mapped 11 physical resource blocks is indicated by RRC signaling, and other subcarriers are mapped to the frequency domain in ascending order of identification.

In a specific implementation, when step S101 is performed, the first partial data may be repeatedly mapped to the physical resource block of the direct link resource using a single first partial data unit as a unit.

For example, in the frequency domain, the lengths of the PSS sequence and the SSS sequence are both 127. In this specific implementation, both the PSS sequence and the SSS sequence are repeated in units of sequences with a length of 127. These repeated sequences are mapped consecutively in the frequency domain. In this specific implementation, instead of repeating in units of multiple consecutive physical resource blocks, the repeating is performed in units of sequences, so that the multiple first parts of data that are repeatedly transmitted are also continuous at the sub-carrier level, that is, the graph can be eliminated. 3. The data gap between the two repeated transmissions before and after.

Further, the starting position in the frequency domain of the first part of the data on the direct link resource may be indicated by high layer signaling. For example, in the PSS sequence and the SSS sequence repeated in units of 127-long sequences, the frequency domain start position of the first mapped sequence is indicated by RRC signaling.

In a specific implementation, the first part of the data may include multiple direct link primary synchronization signal sequences and multiple secondary synchronization signal sequences, and the sequence length of the first part of the data is greater than a single direct link primary synchronization signal sequence The sum of the sequence length of and the sequence length of a single secondary synchronization signal sequence.

Specifically, in this specific implementation, the new sequences are used as the new direct link primary synchronization signal sequence and the secondary synchronization signal sequence, and are mapped to the physical resource blocks of the direct link resources. The specific content and sequence length of the new sequence are different from the 127-long PSS sequence and the SSS sequence in the above-mentioned specific implementation.

For example, the PSS sequence is composed of M sequences with a length of 127×N. In one embodiment, the generation formula of the sequence is:

d _PSS (n)=1-2x(m);

m=[n+43*N*N ² _ID ]mod(127*N), 0≤n<127*N;

where x(i+7)=[x(i+4)+x(i)]mod2, N ² _ID ={0,1,2},[x(6) x(5) x(4) x (3) x(2) x(1) x(0)]=[1 1 1 0 1 1 0]. Among them, N is a natural number and is negatively correlated with the subcarrier spacing.

For example, the SSS sequence is composed of a gold sequence of length 127×N. In one embodiment, the generation formula of the sequence is:

d _sss (n)={1-2x ₀ [(n+m ₀ )mod 127N]}{1-2x ₁ [(n+m ₁ )mod 127N]}

0≤n＜127

where x ₀ (i+7)=[x ₀ (i+4)+x ₀ (i)]mod 2

x ₁ (i+7)=[x ₁ (i+4)+x ₁ (i)]mod 2

and [x ₀ (6) x ₀ (5) x ₀ (4) x ₀ (3) x ₀ (2) x ₀ (1) x ₀ (0)] = [0 0 0 0 0 0 1]

[x ₁ (6) x ₁ (5) x ₁ (4) x ₁ (3) x ₁ (2) x ₁ (1) x ₁ (0)]=[0 0 0 0 0 0 1]

N is a natural number and negatively related to the subcarrier spacing.

By redesigning the sequence structure in the first part of the data, a better peak-to-average ratio can be obtained than repeated transmission of PSS sequences and SSS sequences.

Further, the sequence length of the first part of the data may be negatively correlated with the subcarrier spacing. For example, for a subcarrier spacing of 15 kHz, the length of the sequence of the first partial data is 127×4. For another example, for a subcarrier spacing of 30 kHz, the length of the sequence of the first part of the data is 127×2. For another example, for a subcarrier spacing of 60 kHz, the length of the sequence of the first part of the data is 127.

FIG. 4 is a schematic structural diagram of an apparatus for transmitting a synchronization signal block of a direct link according to an embodiment of the present invention. Those skilled in the art understand that the apparatus 4 for transmitting a synchronization signal block of a direct link in this embodiment may be used to implement the method and technical solutions described in the embodiments described in FIG. 1 to FIG. 3 .

Specifically, the direct link synchronization signal block includes a first part of data and a second part of data.

Further, with reference to FIG. 4 , the apparatus 4 for transmitting a synchronization signal block of a direct link in this embodiment may include: a first mapping module 41, configured to continuously map the first part of data to the direct link in the frequency domain a physical resource block of resources; the second mapping module 42 is configured to map the second part of data to spare resources in the order of interleaving priority, wherein the spare resources are the direct link resources that are not mapped to the The resource of the first part of the data; the transmission module 43, configured to transmit the synchronization signal block of the direct link by using the direct link resource.

For more details on the working principle and working mode of the direct-link synchronization signal block transmission apparatus 4 , reference may be made to the relevant descriptions in the above-mentioned FIGS. 1 to 3 , and details are not repeated here.

In a specific implementation, the above-mentioned direct-connected link synchronization signal block transmission device 4 may correspond to a processing chip with a resource mapping function in a direct-connected link terminal; or a chip with a data processing function, such as a baseband chip; or corresponding to The direct link terminal includes a chip module of a resource mapping chip; or corresponds to a chip module having a data processing function chip, or corresponds to a direct link terminal. Among them, the processing chip with the resource mapping function can reuse the processing chip with the communication function.

In specific implementation, regarding each module/unit included in each device and product described in the above embodiments, it may be a software module/unit, a hardware module/unit, or a part of a software module/unit, a part of which is a software module/unit. is a hardware module/unit.

For example, for each device or product applied to or integrated in a chip, each module/unit included therein may be implemented by hardware such as circuits, or at least some of the modules/units may be implemented by a software program. Running on the processor integrated inside the chip, the remaining (if any) part of the modules/units can be implemented by hardware such as circuits; for each device and product applied to or integrated in the chip module, the modules/units contained therein can be They are all implemented by hardware such as circuits, and different modules/units can be located in the same component of the chip module (such as chips, circuit modules, etc.) or in different components, or at least some of the modules/units can be implemented by software programs. The software program runs on the processor integrated inside the chip module, and the remaining (if any) part of the modules/units can be implemented by hardware such as circuits; for each device and product applied to or integrated in the terminal, each module contained in it The units/units may all be implemented in hardware such as circuits, and different modules/units may be located in the same component (eg, chip, circuit module, etc.) or in different components in the terminal, or at least some of the modules/units may be implemented by software programs Realization, the software program runs on the processor integrated inside the terminal, and the remaining (if any) part of the modules/units can be implemented in hardware such as circuits.

An embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, on which a computer program is stored, and the computer program is executed by a processor At runtime, the steps of the direct link synchronization signal block transmission method provided by any of the foregoing embodiments are executed. Preferably, the storage medium may include a computer-readable storage medium such as a non-volatile memory or a non-transitory memory. The storage medium may include ROM, RAM, magnetic or optical disks, and the like.

An embodiment of the present invention further provides another direct-link synchronization signal block transmission device, including a memory and a processor, where the memory stores a computer program that can run on the processor, and the processor runs all When the computer program is executed, the steps of the direct link synchronization signal block transmission method provided by the embodiments corresponding to FIG. 1 to FIG. 3 are executed.

Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium, and the storage medium can include: ROM, RAM, magnetic disk or optical disk, etc.

The technical solution of the present invention can be applied to 5G (5th generation) communication systems, 4G and 3G communication systems, and various communication systems that are subsequently evolved, such as 6G and 7G.

The technical solution of the present invention is also applicable to different network architectures, including but not limited to relay network architectures, dual-link architectures, and Vehicle-to-Everything (vehicle-to-anything communication) architectures.

The 5G CN described in the embodiments of this application may also be referred to as a new core network (new core), or 5G NewCore, or a next generation core network (next generation core, NGC), or the like. 5G-CN is set up independently of an existing core network, such as an evolved packet core (EPC).

A base station (base station, BS) in the embodiments of the present application, which may also be referred to as base station equipment, is a device deployed in a wireless access network to provide a wireless communication function. For example, the devices that provide base station functions in 2G networks include base transceiver stations (BTS) and base station controllers (BSCs). The devices that provide base station functions in 3G networks include Node B (NodeB) and wireless The network controller (radio network controller, RNC), the equipment that provides the base station function in the 4G network includes the evolved NodeB (evolved NodeB, eNB), in the wireless local area network (wireless local area network, WLAN), the device that provides the base station function The equipment is an access point (AP), and the equipment that provides base station functions in 5G New Radio (NR) includes the continuously evolving Node B (gNB), and the equipment that provides base station functions in new communication systems in the future Wait.

The terminal in the embodiments of this application may refer to various forms of user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station (mobile station, MS), remote station, remote terminal, Mobile equipment, user terminal, terminal equipment, wireless communication equipment, user agent or user equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks or future evolved Public Land Mobile Networks (PLMN) A terminal device, etc., is not limited in this embodiment of the present application.

The embodiment of the present application defines the unidirectional communication link from the access network to the terminal as the downlink, the data transmitted on the downlink is the downlink data, and the transmission direction of the downlink data is called the downlink direction; The unidirectional communication link is the uplink, the data transmitted on the uplink is the uplink data, and the transmission direction of the uplink data is called the uplink direction.

It should be understood that the term "and/or" in this document is only an association relationship to describe associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, and A and B exist at the same time , there are three cases of B alone. In addition, the character "/" in this text indicates that the related objects are an "or" relationship.

The "plurality" in the embodiments of the present application refers to two or more.

The descriptions of the first, second, etc. appearing in the embodiments of the present application are only used for illustration and distinguishing the description objects, and have no order. any limitations of the examples.

The "connection" in the embodiments of the present application refers to various connection modes such as direct connection or indirect connection, so as to realize communication between devices, which is not limited in the embodiments of the present application. "Network" and "system" appearing in the embodiments of this application express the same concept, and a communication system is a communication network.

It should be understood that in the embodiments of the present application, the processor may be a central processing unit (central processing unit, CPU for short), and the processor may also be other general-purpose processors, digital signal processors (digital signal processor, DSP for short) , application specific integrated circuit (ASIC), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be understood that the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory may be random access memory (RAM), which acts as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (DRAM) Access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory Fetch memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).

The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server or data center Transmission to another website site, computer, server, or data center by wire (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that contains one or more sets of available media. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media. The semiconductor medium may be a solid state drive.

It should be understood that, in various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.

In the several embodiments provided in this application, it should be understood that the disclosed method, apparatus and system may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment. In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included individually, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware, or can be implemented in the form of hardware plus software functional units.

The above-mentioned integrated units implemented in the form of software functional units can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute some steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM for short), Random Access Memory (RAM for short), magnetic disk or CD, etc. that can store program codes medium.

Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be based on the scope defined by the claims.

Claims

A method for transmitting a synchronization signal block of a direct connection link, wherein the synchronization signal block of the direct connection link includes a first part of data and a second part of data, wherein the method comprises:

continuously mapping the first part of data to physical resource blocks of direct link resources in the frequency domain;

mapping the second part of data to spare resources according to the order of interleaving priority, wherein the spare resources are resources to which the first part of data is not mapped in the direct link resources;

The direct link synchronization signal block is transmitted using the direct link resource.
The method according to claim 1, wherein the mapping of the second part of data to spare resources according to the order of interleaving priority comprises:

Determine the starting position of the spare resource according to the cell identifier;

The second part of data is mapped to the spare resource from the starting position in an order of interleaving index numbers from high to low or from low to high.
The method according to claim 2, wherein the determining the starting position of the spare resource according to the cell identifier comprises:

The starting position is determined according to a modulo result of the cell identifier and the total number of interlaces.
The method according to claim 2, wherein the interleaving index number is in one-to-one correspondence with interleaving resources, a plurality of physical resource blocks included in the interleaving resources are discretely distributed in the frequency domain, and the spare resources include n Interleaving resources, where n is a positive integer greater than or equal to 2.
The method according to claim 4, wherein, according to the sequence of interleaving index numbers from high to low or from low to high, the second part of data is mapped to the space from the starting position Resources include:

In the order of the interleaving index numbers from high to low or from low to high, the second part of the data is mapped to all physical resource blocks of the n-1 interleaving resources and the n-th interleaving resource from the starting position. Part of the physical resource block.
The method according to claim 5, wherein the partial PRB of the n-th interleaving resource is selected from the group consisting of: a physical resource block with the smallest identifier in the n-th interleaving resource, a physical resource block marked in the n-th interleaving resource The largest physical resource block and the preset physical resource block in the n-th interleaved resource, the preset physical resource block is configured by high-layer signaling.
The method according to claim 5, wherein, in the frequency domain, the number of physical resource blocks occupied by the first part of the data on the direct link resources is equal to the number of physical resource blocks occupied by the second part of the data on the direct link resources The number of physical resource blocks occupied on the link resource.
The method according to claim 4, wherein, according to the sequence of interleaving index numbers from high to low or from low to high, the second part of data is mapped to the space from the starting position Resources include:

The second part of data is mapped to all physical resource blocks of the n interleaving resources from the starting position in the order of interleaving index numbers from high to low or from low to high.
The method according to claim 8, wherein, in the frequency domain, the number of physical resource blocks occupied by the first part of the data on the direct link resources is different from the number of physical resource blocks occupied by the second part of the data in the direct link resources. The number of physical resource blocks occupied on link resources.
The method according to claim 1, wherein the spare resources are obtained through high-layer signaling configuration or pre-definition.
The method according to claim 1, wherein the continuously mapping the first part of the data to the physical resource block of the direct link resource in the frequency domain comprises:

The first part of data is continuously and repeatedly mapped to physical resource blocks of the direct link resource in the frequency domain.
The method according to claim 11, wherein the number of times of repeated mapping of the first part of the data is negatively correlated with the subcarrier spacing of the direct link resource.
The method according to claim 11, wherein the continuously and repeatedly mapping the first part of the data to the physical resource block of the direct link resource in the frequency domain comprises:

Taking physical resource blocks occupied by a single first portion of data on the direct link resource as a unit, repeatedly mapping the first portion of data to the physical resource blocks of the direct link resource.
The method according to claim 13, wherein a frequency domain starting position of the first part of the data on the direct link resource is indicated by high layer signaling, and the high layer signaling includes the first part of the data The center frequency point of the physical resource block occupied on the direct link resource or the frequency point that identifies the smallest subcarrier.
The method according to claim 11, wherein the continuously and repeatedly mapping the first part of the data to the physical resource block of the direct link resource in the frequency domain comprises:

The first partial data is repeatedly mapped to the physical resource block of the direct link resource in a unit of a single first partial data.
The method according to claim 15, wherein the starting position of the first part of the data in the frequency domain on the direct link resource is indicated by high layer signaling.
The method according to claim 1, wherein the first part of the data comprises multiple direct link primary synchronization signal sequences and multiple secondary synchronization signal sequences, and the sequence length of the first part of the data is greater than that of a single direct link The sum of the sequence length of the link primary synchronization signal sequence and the sequence length of a single secondary synchronization signal sequence.
The method according to claim 17, wherein the sequence length of the first part of the data is negatively correlated with the subcarrier spacing.
A direct-connected link synchronization signal block transmission device, wherein the direct-connected link synchronization signal block includes a first part of data and a second part of data, characterized in that the device includes:

a first mapping module, configured to continuously map the first part of data to physical resource blocks of direct link resources in the frequency domain;

a second mapping module, configured to map the second part of data to spare resources in the order of interleaving priority, wherein the spare resources are resources in the direct link resources to which the first part of data is not mapped;

A transmission module, configured to transmit the direct link synchronization signal block by using the direct link resource.
A computer-readable storage medium, the computer-readable storage medium being a non-volatile storage medium or a non-transitory storage medium, on which a computer program is stored, wherein the computer program is executed when a processor runs The steps of the method of any one of claims 1 to 18.
A direct link synchronous signal block transmission device, comprising a memory and a processor, the memory stores a computer program that can be run on the processor, characterized in that when the processor runs the computer program The steps of the method of any one of claims 1 to 18 are performed.