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

Abstract

A method and apparatus for transmitting a direct link synchronization signal block, and a computer-readable storage medium, wherein the direct link synchronization signal block includes a first portion of data and a second portion of data. The method comprises: continuously mapping the first portion of data to a physical resource block of a direct link resource in the frequency domain; mapping the second portion of data to spare resources in an interleaving priority order, wherein the spare resources are resources in the direct link resource to which the first portion of data is not mapped; and transmitting the direct link synchronization signal block using the direct link resource. The solution of the present invention can effectively solve the problem that the direct link synchronization signal block cannot meet the OCB requirements when transmitted on an unlicensed spectrum, and further solve the problem of power limitation.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a method and device for transmitting a direct link synchronization signal block, and a computer-readable storage medium. Background Art

[0002] In the time domain, a direct link terminal transmits or receives the physical sidelink broadcast channel (PSBCH), primary synchronization signal (PSS), and secondary synchronization signal (SSS) in consecutive symbols. These signals constitute a direct link synchronization signal transmission block (S-SS / PSBCH block, sidelink synchronization signal / physical sidelink broadcast channel block, referred to as direct link synchronization signal block, SL-SSB).

[0003] On the other hand, data transmission on unlicensed spectrum must meet Occupied Channel Bandwidth (OCB) requirements, such as an 80% bandwidth requirement. According to existing protocols, SL-SSB occupies 11 Physical Resource Blocks (PRBs) in the frequency domain, while the Listen Before Talk (LBT) bandwidth is 20 MHz, encompassing a total of 100 PRBs. Clearly, the existing SL-SSB structure does not meet OCB requirements when transmitting on unlicensed spectrum.

[0004] In addition, unlicensed spectrum also has power spectral density (PSD) limits, such as 13 decibels per megahertz (dB / MHz). For a 15 kilohertz (kHz) subcarrier spacing, the maximum transmit power of 11 PRBs is approximately 16 decibel milliwatts (dBm); for a 30 kHz subcarrier spacing, the maximum transmit power of 11 PRBs is approximately 19 dBm; and for a 60 kHz subcarrier spacing, the maximum transmit power of 11 PRBs is approximately 22 dBm.

[0005] In summary, according to the existing technology, when transmitting direct link synchronization information blocks on unlicensed spectrum, the OCB requirement cannot be met, and the transmission power is also limited. Summary of the Invention

[0006] 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.

[0007] To solve the above technical problems, an embodiment of the present invention provides a direct link synchronization signal block transmission method, wherein the direct link synchronization signal block includes a first part of data and a second part of data. The method includes: continuously mapping the first part of data to the physical resource block of the direct link resource in the frequency domain; mapping the second part of data to the spare resources in an interleaving priority order, wherein the spare resources are resources in the direct link resource to which the first part of data is not mapped; and using the direct link resource to transmit the direct link synchronization signal block.

[0008] Optionally, mapping the second part of data to the spare resources in the order of interleaving priority includes: determining the starting position of the spare resources based on the cell identifier; and mapping the second part of data to the spare resources starting from the starting position in the order of interleaving index numbers from high to low or from low to high.

[0009] Optionally, determining the starting position of the free resources according to the cell identifier includes: determining the starting position according to a modulo result of the cell identifier and the total number of interleavings.

[0010] Optionally, the interleaving index number corresponds one-to-one to the interleaving resource, the interleaving resource includes multiple physical resource blocks 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.

[0011] Optionally, mapping the second part of data to the free resources starting from the starting position in the order of interleaving index numbers from high to low or from low to high includes: mapping the second part of data to all physical resource blocks of n-1 interleaving resources and part of the physical resource blocks of the nth interleaving resource starting from the starting position in the order of interleaving index numbers from high to low or from low to high.

[0012] Optionally, the partial PRBs of the nth interleaved resource are selected from: the physical resource block with the smallest identifier in the nth interleaved resource, the physical resource block with the largest identifier in the nth interleaved resource, and the preset physical resource block in the nth interleaved resource, and the preset physical resource block is configured by high-layer signaling.

[0013] Optionally, in the frequency domain, the number of physical resource blocks occupied by the first part of data on the direct link resources is equal to the number of physical resource blocks occupied by the second part of data on the direct link resources.

[0014] Optionally, mapping the second part of data to the free resources starting from the starting position in an order of high to low or low to high interleaving index numbers includes: mapping the second part of data to all physical resource blocks of the n interleaving resources starting from the starting position in an order of high to low or low to high interleaving index numbers.

[0015] Optionally, in the frequency domain, the number of physical resource blocks occupied by the first portion of data on the direct link resources is different from the number of physical resource blocks occupied by the second portion of data on the direct link resources.

[0016] Optionally, the free resources are configured through high-layer signaling or obtained through predefinition.

[0017] Optionally, continuously mapping the first portion of data to the physical resource blocks of the direct link resources in the frequency domain includes: continuously and repeatedly mapping the first portion of data to the physical resource blocks of the direct link resources in the frequency domain.

[0018] Optionally, the number of repeated mappings of the first part of data is negatively correlated with the subcarrier spacing of the direct link resources.

[0019] 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: repeatedly mapping the first part of data to the physical resource block of the direct link resource in units of the physical resource block occupied by a single first part of data on the direct link resource.

[0020] 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 center frequency of the physical resource block occupied by the first part of the data on the direct link resource or the frequency of the subcarrier with the smallest identifier.

[0021] Optionally, continuously and repeatedly mapping the first portion of data to the physical resource block of the direct link resource in the frequency domain includes: repeatedly mapping the first portion of data to the physical resource block of the direct link resource in units of a single first portion of data.

[0022] Optionally, the frequency domain starting position of the first part of data on the direct link resource is indicated by high-layer signaling.

[0023] Optionally, the first part of data includes multiple direct link primary synchronization signal sequences and multiple secondary synchronization signal sequences, and the sequence length of the first part of data is greater than the sum of the sequence length of a single direct link primary synchronization signal sequence and the sequence length of a single secondary synchronization signal sequence.

[0024] Optionally, the sequence length of the first part of data is negatively correlated with the subcarrier spacing.

[0025] To solve the above technical problems, an embodiment of the present invention also provides a direct link synchronization signal block transmission device, wherein the direct link synchronization signal block includes a first part of data and a second part of data, and the device includes: a first mapping module, used to continuously map the first part of data to the physical resource block of the direct link resource in the frequency domain; a second mapping module, used to map the second part of data to the spare resources in an interleaving priority order, wherein the spare resources are resources in the direct link resources to which the first part of data is not mapped; a transmission module, used to use the direct link resources to transmit the direct link synchronization signal block.

[0026] To solve the above technical problems, an embodiment of the present invention further provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transient storage medium, on which a computer program is stored. When the computer program is run by a processor, the steps of the above method are executed.

[0027] In order to solve the above technical problems, an embodiment of the present invention also provides a direct link synchronization signal block transmission device, including a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the processor executes the steps of the above method when running the computer program.

[0028] Compared with the prior art, the technical solution of the embodiment of the present invention has the following beneficial effects:

[0029] An embodiment of the present invention provides a method for transmitting a direct link synchronization signal block, wherein the direct link synchronization signal block includes a first part of data and a second part of data. The method includes: continuously mapping the first part of data to a physical resource block of a direct link resource in the frequency domain; mapping the second part of data to spare resources in an interleaving priority order, wherein the spare resources are resources in the direct link resource to which the first part of data is not mapped; and using the direct link resource to transmit the direct link synchronization signal block.

[0030] Compared with the direct link synchronization signal block structure used in existing transmission, this implementation scheme 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 resource mapped and transmitted using an interleaved structure, so that the direct link synchronization signal block structure redesigned by the present embodiment can meet the OCB requirements when transmitted on an unlicensed spectrum. Furthermore, the first part of the data in the direct link synchronization signal block redesigned by the present implementation scheme is still mapped to continuous physical resource blocks in the frequency domain, that is, mapped to physical resource blocks with the same number in continuous interleaved resource blocks, thereby effectively ensuring that the performance of receiving the first part of the data will not be affected. Furthermore, the first part of the data may include PSS and SSS, and the second part of the data may include PSBCH and its demodulation reference signal (DMRS).

[0031] Furthermore, continuously mapping the first portion of data to the physical resource blocks of the direct link resources in the frequency domain includes continuously and repeatedly mapping the first portion of data to the physical resource blocks of the direct link resources in the frequency domain. Thus, by designing repeated transmission of the PSS and SSS in the frequency domain, transmit power is improved, effectively addressing the power limitation of direct link synchronization signal blocks when transmitted in unlicensed spectrum. Therefore, this implementation can meet both OCB requirements and transmit power requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a flowchart of a direct link synchronization signal block transmission method according to an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of time-frequency resources for the first typical application scenario of an embodiment of the present invention;

[0034] Figure 3 Schematic diagram of time-frequency resources in a second typical application scenario of an embodiment of the present invention;

[0035] Figure 4 It is a structural diagram of a direct link synchronization signal block transmission device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0036] As mentioned in the background art, according to the existing technology, when transmitting direct link synchronization information blocks on unlicensed spectrum, the OCB requirement cannot be met and the transmission power is also limited.

[0037] To address the OCB problem when transmitting data on unlicensed spectrum, the latest technology introduces an interlace structure in the air interface of the New Radio in Unlicensed Spectrum (NR-U) operating in the unlicensed frequency band.

[0038] Specifically, resources allocated using an interleaved approach (also called interleaved resource blocks or interleaved resources) consist of physical resource blocks {m, M+m, 2M+m, 3M+m, ...}, where m∈{0, 1, ..., M-1}, and M is the total number of interleavers. For example, for a subcarrier spacing of 15 kHz, M is 10. For another example, for a subcarrier spacing of 30 kHz, M is 5.

[0039] Interleaved Resource Blocks and common physical resource blocks The relationship between them is as follows:

[0040]

[0041] in, It is the public physical resource block where BWP starts; mod is the remainder symbol.

[0042] After analysis, the inventors of this application discovered that adopting an interleaved structure for the PSS and SSS in direct link synchronization signal blocks results in non-continuous distribution of the PSS and SSS sequences in the frequency domain. This can degrade the performance of receiving the PSS and SSS. Therefore, the PSS and SSS signals transmitted by direct link terminals using this embodiment do not adopt an interleaved structure. Furthermore, the issue of limited maximum transmit power can be addressed by repeatedly transmitting the PSS and SSS signals.

[0043] For the PSBCH and its DMRS, adopting an interleaved structure will increase the Peak to Average Power Ratio (PAPR) by approximately 1-2 dB. This increase in PAPR has little impact on performance. Therefore, the PSBCH and its DMRS transmitted by the direct link terminal in this embodiment adopt an interleaved structure.

[0044] 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 is power-limited when transmitted on an unlicensed spectrum, an embodiment of the present invention provides a direct link synchronization signal block transmission method, wherein the direct link synchronization signal block includes a first portion of data and a second portion of data, and the method includes: continuously mapping the first portion of data to a physical resource block of a direct link resource in the frequency domain; mapping the second portion of data to spare resources in an interleaving priority order, wherein the spare resources are resources in the direct link resource to which the first portion of data is not mapped; and using the direct link resource to transmit the direct link synchronization signal block.

[0045] This implementation scheme adopts different resource mapping methods for transmission of the two parts of data. Specifically, the second part of the data in the direct link synchronization signal block is resource mapped and transmitted using an interleaved structure, so that the direct link synchronization signal block structure redesigned by this embodiment can meet the OCB requirements when transmitted on an unlicensed spectrum. Furthermore, the first part of the data in the direct link synchronization signal block redesigned by this implementation scheme is still mapped to continuous physical resource blocks in the frequency domain, that is, mapped to physical resource blocks with the same number in continuous interleaved resource blocks, thereby effectively ensuring that the performance of receiving the first part of the data will not be affected. Furthermore, the first part of the data may include PSS and SSS, and the second part of the data may include PSBCH and its demodulation reference signal (DMRS).

[0046] In order to make the above-mentioned objects, features and beneficial effects of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0047] Figure 1 This is a flowchart of a direct link synchronization signal block transmission method according to an embodiment of the present invention.

[0048] Specifically, the direct link may connect a transmitter (Tx) and a receiver (Rx). Both the transmitter and the receiver may be user equipment (UE). Alternatively, the direct link may connect a base station (gNB), with the base station sending information to the receiver via the transmitter. In this embodiment, terminals connected to the direct link are referred to as direct link terminals.

[0049] The method of this embodiment can be executed by a direct link terminal. Specifically, this embodiment can be executed by a chip with a resource mapping function in the direct link terminal, or by a baseband chip in the direct link terminal.

[0050] Furthermore, the direct link is transmitted on an unlicensed spectrum.

[0051] Furthermore, direct link resources are allocated in an interleaved manner, wherein an interleaved resource can be identified by an interleaved index number, and the multiple physical resource blocks contained in an interleaved resource can be discretely distributed in the frequency domain.

[0052] Furthermore, through the solution of this embodiment, a direct link synchronization signal block can be transmitted using direct link resources. Specifically, the direct link synchronization signal block can include a first portion of data and a second portion of data, wherein the first portion of data can include PSS and SSS, and the second portion of data can include PSBCH and its DMRS.

[0053] refer to Figure 1 The direct link synchronization signal block transmission method of this embodiment may include the following steps:

[0054] Step S101: continuously mapping the first portion of data to physical resource blocks of direct link resources in the frequency domain;

[0055] Step S102: Mapping the second portion of data to spare resources in an interleaving priority order, wherein the spare resources are resources in the direct link resources to which the first portion of data is not mapped;

[0056] Step S103: using the direct link resources to transmit the direct link synchronization signal block.

[0057] In one specific implementation, the PSS and SSS may occupy 11 consecutive physical resource blocks, where the lengths of the PSS and SSS sequences are both 127. Accordingly, in step S101, the PSS and SSS sequences may be mapped to 127 subcarriers out of the 132 subcarriers corresponding to the 11 physical resource blocks of the direct link resources.

[0058] For example, reference Figure 2 In the frequency domain, the first portion of data can be mapped to subcarriers 2, 3, ..., 127, and 128 of the 132 subcarriers. Furthermore, in the time domain, the PSS and SSS each occupy two Orthogonal Frequency Division Multiplexing (OFDM) symbols in a single time slot.

[0059] Figure 2 The horizontal axis is the time domain, the vertical axis is the frequency domain, and each row corresponds to a physical resource block. A physical resource block includes 14 OFDM symbols (0 to 13) in the time domain and 12 subcarriers in the frequency domain. Figure 2 The direct link resources in are interleaved and allocated with M=10.

[0060] In a specific implementation, the step S102 may include the steps of: determining the starting position of the spare resources according to the cell identifier; and mapping the second part of the data to the spare resources starting from the starting position in the order of the interleaving index numbers from high to low or from low to high.

[0061] Specifically, a direct link terminal implementing this embodiment can determine the interleaved resources used for this transmission based on the cell identifier. The PSS and SSS of this transmission can include cell identifier-related information, allowing the receiver to determine the interleaved resources carrying the PSBCH and its DMRS. Alternatively, the cell identifier can refer to the cell in which the direct link terminal is currently residing.

[0062] Furthermore, the starting position can be determined based on the modulo result of the cell identifier and the total number of interleavings. For example, the PSBCH and its DMRS can occupy two interleaving resources. Accordingly, the cell identifier and the total number of interleavings can be used to determine one interleaving resource occupied by the PSBCH and its DMRS, and the other interleaving resource is an interleaving resource adjacent to the interleaving resource.

[0063] Furthermore, in the frequency domain, the number of physical resource blocks occupied by the first portion of data on the direct link resources may be equal to the number of physical resource blocks occupied by the second portion of data on the direct link resources. For example, the PSS and SSS occupy 11 consecutive physical resource blocks in the frequency domain, and these 11 physical resource blocks correspond to two interleaved resources. Accordingly, the available resources for carrying the PSBCH and its DMRS may also be two interleaved resources.

[0064] In a variation, the positions of all interleaved resources occupied by the second portion of data may be indicated in a specific manner, such as through high-layer signaling, pre-definition, and the like.

[0065] In a specific implementation, the spare resources may include n interleaving resources, where n is a positive integer greater than or equal to 2.

[0066] Specifically, the specific value of n can be determined according to the closest number of interleaving resources that can satisfy the information bits carried within the PSBCH.

[0067] Further, when executing step S102, the second part of data can be mapped to all physical resource blocks of n-1 interleaved resources and part of the physical resource blocks of the nth interleaved resource starting from the starting position in the order of interleaving index numbers from high to low or from low to high.

[0068] Taking n=2 as an example, combined with Figure 2The two interlace resources identified as interlace 0 (denoted as interlace-0 in the figure) and the interlace resource identified as interlace 1 (denoted as interlace-1 in the figure) are determined as the spare resources. All physical resource blocks in interlace-0 are used to transmit the PSBCH and its DMRS, and one physical resource block in interlace-1 is used to transmit the PSBCH and its DMRS.

[0069] Furthermore, the part of the PRBs of the nth interleaved resource may be the physical resource block with the smallest identifier in the nth interleaved resource. The smallest identifier refers to the smallest identifier in the frequency domain, such as Figure 2 As shown, interlace-1 identifies the smallest physical resource block in the frequency domain for carrying PSBCH and its DMRS.

[0070] In a variation, some PRBs of the n interleaved resources may be physical resource blocks with the largest identifier in the nth interleaved resource.

[0071] In one variation, some of the PRBs of the n interleaved resources may be preset physical resource blocks in the nth interleaved resource, and the preset physical resource blocks are configured by higher-layer signaling, such as Radio Resource Control (RRC) signaling.

[0072] In a specific implementation, the spare resources may be configured through higher layer signaling, for example, the higher layer signaling may be RRC signaling.

[0073] Specifically, the direct link terminal receives RRC signaling sent by the base station in advance, and obtains therefrom the free resources for carrying the PSBCH and its DMRS.

[0074] In a variation, the free resources may be obtained through predefinition.

[0075] Furthermore, different interlace resources can be predefined as spare resources for different application scenarios. For example, for a vehicle-to-everything (V2X) scenario, interlace-0 and interlace-1 can be predefined as spare resources; for a high-speed rail communication application scenario, interlace-4 and interlace-5 can be predefined as spare resources. A direct link terminal implementing this embodiment can determine the predefined spare resources based on its current application scenario.

[0076] In a specific implementation, when executing step S102, the second portion of data may be mapped to all physical resource blocks of the n interleaved resources starting from the starting position in an order of interleaving index numbers from high to low or from low to high.

[0077] Furthermore, in the frequency domain, the number of physical resource blocks occupied by the first portion of data on the direct link resources may be different from the number of physical resource blocks occupied by the second portion of data on the direct link resources.

[0078] For example, in the frequency domain, PSBCH and its DMRS are not limited to being mapped in 11 physical resource blocks, but the second part of the data can be mapped to Figure 2 All physical resource blocks of interlace-0 and interlace-1 in the

[0079] From the above, this implementation scheme adopts different resource mapping methods for transmission of the two parts of data. Specifically, the second part of the data in the direct link synchronization signal block is resource mapped and transmitted using an interleaved structure, so that the direct link synchronization signal block structure redesigned by this embodiment can meet the OCB requirements when transmitted on an unlicensed spectrum. Furthermore, the first part of the data in the direct link synchronization signal block redesigned by this implementation scheme is still mapped to continuous physical resource blocks in the frequency domain, that is, mapped to physical resource blocks with the same number in continuous interleaved resource blocks, thereby effectively ensuring that the performance of receiving the first part of the data will not be affected.

[0080] In one specific implementation, step S101 may include the step of continuously and repeatedly mapping the first portion of data to the physical resource blocks of the direct link resources in the frequency domain. Thus, by designing repeated transmission of the PSS and SSS in the frequency domain, transmit power is improved, effectively addressing the power limitation of direct link synchronization signal blocks when transmitted in unlicensed spectrum. Thus, this embodiment can meet both OCB requirements and transmit power requirements.

[0081] Specifically, the number of repeated mappings of the first portion of data may be negatively correlated with the subcarrier spacing of the direct link resources. Specifically, a larger subcarrier spacing increases the bandwidth of a single physical resource block, making it easier to overcome PSD limitations. Therefore, in this specific implementation, as the subcarrier spacing increases, the number of repeated transmissions may be appropriately reduced to save power.

[0082] For example, for a 15 kHz subcarrier spacing, the PSS and SSS may be repeated four times. For another example, for a 30 kHz subcarrier spacing, the PSS and SSS may be repeated twice. For another example, for a 60 kHz subcarrier spacing, the PSS and SSS do not need to be repeated.

[0083] In a specific implementation, when executing step S101, the first portion of data may be repeatedly and continuously mapped to the physical resource blocks of the direct link resource, taking the physical resource block occupied by a single first portion of data on the direct link resource as a unit.

[0084] For example, reference Figure 3 , a single PSS sequence and SSS sequence are continuously mapped to 11 physical resource blocks in the frequency domain, and repeated with these 11 consecutive physical resource blocks as units. The mapping method of the sequences in each of the 11 physical resource blocks is the same, where the length of the PSS sequence and SSS sequence is 127.

[0085] Furthermore, the frequency domain starting position of the first portion of data on the direct link resource is indicated by high-layer signaling, and the high-layer signaling may include the center frequency of the physical resource block occupied by the first portion of data on the direct link resource. For example, in order from low to high in the frequency domain, the center frequency of the first 11 mapped 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 (or descending) order.

[0086] In one variation, the higher-layer signaling may include the frequency of the subcarrier with the smallest identifier in the physical resource block occupied by the first portion of data on the direct link resource. For example, the frequency of the subcarrier with the smallest identifier in the first 11 mapped physical resource blocks is indicated by RRC signaling, and the remaining subcarriers are mapped to the frequency domain in ascending order of identifiers.

[0087] In a specific implementation, when step S101 is executed, the first portion of data may be repeatedly mapped to the physical resource block of the direct link resource in units of a single first portion of data.

[0088] For example, if the length of the PSS sequence and the SSS sequence in the frequency domain are both 127, then in this specific implementation, the PSS sequence and the SSS sequence are repeated in units of 127-length sequences. These repeated sequences are continuously mapped in the frequency domain. In this specific implementation, the repetition is not in units of multiple consecutive physical resource blocks, but in units of sequences. In this way, the multiple first parts of data that are repeatedly transmitted are also continuous at the subcarrier level, which can eliminate Figure 3 The data gap between two repeated transmissions.

[0089] Furthermore, the frequency domain starting position of the first portion of data on the direct link resource can be indicated by high-layer signaling. For example, in a PSS sequence and an SSS sequence repeated in units of a 127-length sequence, the frequency domain starting position of the first mapped sequence is indicated by RRC signaling.

[0090] In one specific implementation, the first part of 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 data is greater than the sum of the sequence length of a single direct link primary synchronization signal sequence and the sequence length of a single secondary synchronization signal sequence.

[0091] Specifically, in this implementation, new sequences are used as new direct link primary synchronization signal sequences and secondary synchronization signal sequences, and are mapped to the physical resource blocks of the direct link resources. The specific content and sequence length of the new sequences are different from the 127-bit long PSS and SSS sequences in the above implementation.

[0092] For example, the PSS sequence is composed of an M sequence with a length of 127×N. In one embodiment, the generation formula of the sequence is:

[0093] d PSS (n) = 1-2x(m);

[0094] m=[n+43*N*N 2 ID ]mod(127*N), 0≤n<127*N;

[0095] Among them, 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]. Wherein, N is a natural number and is negatively correlated with the subcarrier spacing.

[0096] For example, the SSS sequence is composed of a gold sequence of length 127×N. In one embodiment, the sequence generation formula is:

[0097] d sss (n)={1-2x0[(n+m0)mod 127N]}{1-2x1[(n+m1)mod 127N]}

[0098]

[0099]

[0100] 0≤n<127

[0101] Among them, x0(i+7)=[x0(i+4)+x0(i)]mod 2

[0102] x1(i+7)=[x1(i+4)+x1(i)]mod 2

[0103] And [x0(6) x0(5) x0(4) x0(3) x0(2) x0(1) x0(0)]=[0 0 0 0 0 0 1]

[0104] [x1(6) x1(5) x1(4) x1(3) x1(2) x1(1) x1(0)]=[0 0 0 0 0 0 1]

[0105] N is a natural number and is negatively correlated with the subcarrier spacing.

[0106] By redesigning the sequence structure in the first part of the data, a better peak-to-average ratio can be obtained compared to repeatedly transmitting the PSS sequence and the SSS sequence.

[0107] Furthermore, the sequence length of the first portion of 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 portion of data is 127×4. For another example, for a subcarrier spacing of 30 kHz, the length of the sequence of the first portion of data is 127×2. For another example, for a subcarrier spacing of 60 kHz, the length of the sequence of the first portion of data is 127.

[0108] Figure 4 This is a schematic diagram of the structure of a direct link synchronization signal block transmission device according to an embodiment of the present invention. Those skilled in the art will appreciate that the direct link synchronization signal block transmission device 4 described in this embodiment can be used to implement the above Figures 1 to 3 The method and technical solutions described in the embodiments.

[0109] Specifically, the direct link synchronization signal block includes a first portion of data and a second portion of data.

[0110] Further, refer to Figure 4 The direct link synchronization signal block transmission device 4 of this embodiment may include: a first mapping module 41, configured to continuously map the first portion of data to physical resource blocks of direct link resources in the frequency domain; a second mapping module 42, configured to map the second portion of data to spare resources in an interleaving priority order, wherein the spare resources are resources in the direct link resources to which the first portion of data is not mapped; and a transmission module 43, configured to transmit the direct link synchronization signal block using the direct link resources.

[0111] For more information about the working principle and working mode of the direct link synchronization signal block transmission device 4, please refer to the above Figures 1 to 3 The relevant description in will not be repeated here.

[0112] In a specific implementation, the above-mentioned direct link synchronization signal block transmission device 4 can correspond to a processing chip with a resource mapping function in a direct link terminal; or correspond to a chip with a data processing function, such as a baseband chip; or correspond to a chip module including a resource mapping chip in a direct link terminal; or correspond to a chip module with a data processing function chip, or correspond to a direct link terminal.

[0113] In specific implementations, the modules / units included in the various devices and products described in the above embodiments may be software modules / units or hardware modules / units, or may be partially software modules / units and partially hardware modules / units.

[0114] For example, for each device or product applied to or integrated into a chip, each module / unit contained therein may be implemented in the form of hardware such as circuits, or at least some of the modules / units may be implemented in the form of software programs, which run on a processor integrated inside the chip, and the remaining (if any) modules / units may be implemented in the form of hardware such as circuits; for each device or product applied to or integrated into a chip module, each module / unit contained therein may be implemented in the form of hardware such as circuits, and different modules / units may be located in the same component (such as a chip, circuit module, etc.) or different components of the chip module, or at least some of the modules / units may be implemented in the form of software programs. The element can be implemented in the form of a software program, which runs on the processor integrated inside the chip module, and the remaining (if any) modules / units can be implemented in the form of hardware such as circuits; for various devices and products applied to or integrated in the terminal, the various modules / units contained therein can be implemented in the form of hardware such as circuits, and different modules / units can be located in the same component (for example, chip, circuit module, etc.) or different components in the terminal, or, at least some modules / units can be implemented in the form of a software program, which runs on the processor integrated inside the terminal, and the remaining (if any) modules / units can be implemented in the form of hardware such as circuits.

[0115] An embodiment of the present invention further provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the direct link synchronization signal block transmission method provided in any of the above 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, a magnetic disk, or an optical disk.

[0116] The embodiment of the present invention further provides another direct link synchronization signal block transmission device, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the processor executes the above-mentioned Figures 1 to 3 The steps of the direct link synchronization signal block transmission method provided in the corresponding embodiment.

[0117] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing the relevant hardware through a program, and the program can be stored in a computer-readable storage medium, which may include: ROM, RAM, disk or CD, etc.

[0118] The technical solution of this invention can be applied to 5G (5th generation) communication systems, as well as 4G and 3G communication systems, and various communication systems that will evolve subsequently, such as 6G and 7G.

[0119] The technical solution of this invention is also applicable to different network architectures, including but not limited to relay network architecture, dual-link architecture, and Vehicle-to-Everything (vehicle-to-anything communication) architecture.

[0120] The 5G CN described in the embodiments of the present application may also be referred to as a new core network (new core), or 5G New Core, or a next generation core network (next generation core, NGC), etc. 5G-CN is set up independently of an existing core network, such as an evolved packet core network (EPC).

[0121] The base station (BS) in the embodiments of the present application, which may also be referred to as a base station device, is a device deployed in a wireless access network to provide wireless communication functions. For example, the devices providing base station functions in a 2G network include a base transceiver station (BTS) and a base station controller (BSC), the devices providing base station functions in a 3G network include a node B (NodeB) and a radio network controller (RNC), the devices providing base station functions in a 4G network include an evolved node B (eNB), the devices providing base station functions in a wireless local area network (WLAN) are access points (AP), the devices providing base station functions in 5G New Radio (NR) include evolved node Bs (gNBs), and the devices providing base station functions in future new communication systems, etc.

[0122] The terminal in the embodiments of the present application may refer to various forms of user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), remote station, remote terminal, mobile device, user terminal, terminal equipment (terminal equipment), wireless communication equipment, user agent or user device. 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 handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN), etc., and the embodiments of the present application are not limited to this.

[0123] The embodiment of the present application defines the unidirectional communication link from the access network to the terminal as a downlink, the data transmitted on the downlink is downlink data, and the transmission direction of the downlink data is called the downlink direction; and the unidirectional communication link from the terminal to the access network is an uplink, the data transmitted on the uplink is uplink data, and the transmission direction of the uplink data is called the uplink direction.

[0124] It should be understood that the term "and / or" as used herein simply describes an association between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " as used herein indicates that the related objects are in an "or" relationship.

[0125] The term "plurality" used in the embodiments of the present application refers to two or more.

[0126] The first, second, etc. descriptions appearing in the embodiments of this application are only for illustration and distinction of the description objects. There is no order, nor does it indicate any special limitation on the number of devices in the embodiments of this application, and cannot constitute any limitation on the embodiments of this application.

[0127] The term "connection" used in the embodiments of this application refers to various connection methods, such as direct connection or indirect connection, to achieve communication between devices, and this embodiment of the application does not impose any restrictions on this. The terms "network" and "system" used in the embodiments of this application express the same concept, and a communication system is a communication network.

[0128] It should be understood that in the embodiments of the present application, the processor may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (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 any conventional processor.

[0129] It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0130] The above embodiments can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented using software, the above embodiments can 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 program are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., infrared, wireless, microwave, etc.) method. 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 or data center that contains one or more available media sets. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state drive.

[0131] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0132] In the several embodiments provided in this application, it should be understood that the disclosed methods, devices and systems can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0133] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, the functional units in the various embodiments of the present invention may be integrated into a processing unit, or each unit may be physically included separately, or two or more units may be integrated into a single unit. The above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0134] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to perform some steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, an optical disk, and other media that can store program code.

[0135] Although the present invention is disclosed as 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 scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A method for transmitting a direct link synchronization signal block, wherein the direct link synchronization signal block includes a first portion of data and a second portion of data, characterized in that: The method comprises: continuously mapping the first portion of data to physical resource blocks of direct link resources in the frequency domain; Mapping the second portion of data to spare resources in an interleaving priority order, wherein the spare resources are resources in the direct link resources to which the first portion of data is not mapped; transmitting the direct link synchronization signal block using the direct link resource; The first part of data includes PSS and SSS, and the second part of data includes PSBCH and its DMRS.

2. The method according to claim 1, characterized in that Mapping the second portion of data to the free resources in the order of interleaving priority includes: Determining a starting position of the free resources according to a cell identifier; Mapping the second portion of data to the free resources starting from the starting position in an order of interleaving index numbers from high to low or from low to high.

3. The method according to claim 2, characterized in that The determining the starting position of the free resources according to the cell identifier includes: The starting position is determined according to a modulo result of the cell identifier and the total number of interleavings.

4. The method according to claim 2, characterized in that The interleaving index number corresponds to the interleaving resource one-to-one. The interleaving resource includes multiple physical resource blocks discretely distributed in the frequency domain. The spare resources include n interleaving resources, where n is a positive integer greater than or equal to 2.

5. The method according to claim 4, characterized in that Mapping the second portion of data to the free resources starting from the starting position in an order of interleaving index numbers from high to low or from low to high includes: The second part of data is mapped to all physical resource blocks of n-1 interleaved resources and part of the physical resource blocks of the nth interleaved resource starting from the starting position in the order of interleaving index numbers from high to low or from low to high.

6. The method according to claim 5, characterized in that The partial PRBs of the nth interleaved resource are selected from: the physical resource block with the smallest identifier in the nth interleaved resource, the physical resource block with the largest identifier in the nth interleaved resource, and the preset physical resource block in the nth interleaved resource, and the preset physical resource block is configured by high-layer signaling.

7. The method according to claim 5, characterized in that In the frequency domain, the number of physical resource blocks occupied by the first portion of data on the direct link resources is equal to the number of physical resource blocks occupied by the second portion of data on the direct link resources.

8. The method according to claim 4, characterized in that Mapping the second portion of data to the free resources starting from the starting position in an order of interleaving index numbers from high to low or from low to high includes: Mapping the second portion of data to all physical resource blocks of the n interleaving resources starting from the starting position in an order of interleaving index numbers from high to low or from low to high.

9. The method according to claim 8, characterized in that In the frequency domain, the number of physical resource blocks occupied by the first portion of data on the direct link resources is different from the number of physical resource blocks occupied by the second portion of data on the direct link resources.

10. The method according to claim 1, characterized in that The free resources are configured through high-layer signaling or are predefined.

11. The method according to claim 1, wherein The continuously mapping the first portion of data to physical resource blocks of direct link resources in the frequency domain includes: The first portion of data is continuously and repeatedly mapped to the physical resource blocks of the direct link resources in the frequency domain.

12. The method according to claim 11, characterized in that The number of repeated mappings of the first portion of data is negatively correlated with the subcarrier spacing of the direct link resources.

13. The method according to claim 11, characterized in that The continuously and repeatedly mapping the first portion of data to the physical resource blocks of the direct link resources in the frequency domain includes: Taking a physical resource block occupied by a single first portion of data on the direct link resource as a unit, repeatedly and continuously mapping the first portion of data to the physical resource blocks of the direct link resource.

14. The method according to claim 13, wherein: The 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 center frequency of the physical resource block occupied by the first part of the data on the direct link resource or the frequency of the subcarrier with the smallest identifier.

15. The method according to claim 11, characterized in that The continuously and repeatedly mapping the first portion of data to the physical resource blocks of the direct link resources in the frequency domain includes: The first portion of data is repeatedly mapped to a physical resource block of the direct link resource using a single first portion of data as a unit.

16. The method according to claim 15, characterized in that The frequency domain starting position of the first part of data on the direct link resource is indicated by high-layer signaling.

17. The method according to claim 1, wherein The first part of data includes multiple direct link primary synchronization signal sequences and multiple secondary synchronization signal sequences, and the sequence length of the first part of data is greater than the sum of the sequence length of a single direct link primary synchronization signal sequence and the sequence length of a single secondary synchronization signal sequence.

18. The method according to claim 17, characterized in that The sequence length of the first part of data is negatively correlated with the subcarrier spacing.

19. A direct link synchronization signal block transmission device, wherein the direct link synchronization signal block includes a first portion of data and a second portion of data, characterized in that: The device comprises: a first mapping module, configured to continuously map the first portion of data to physical resource blocks of direct link resources in the frequency domain; a second mapping module, configured to map the second portion of data to spare resources in an order of interleaving priority, wherein the spare resources are resources in the direct link resources to which the first portion of data is not mapped; a transmission module, configured to transmit the direct link synchronization signal block using the direct link resource; The first part of data includes PSS and SSS, and the second part of data includes PSBCH and its DMRS.

20. A computer-readable storage medium, wherein the computer-readable storage medium is a non-volatile storage medium or a non-transient storage medium, and a computer program is stored thereon, wherein: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 18 are performed.

21. A direct link synchronization signal block transmission device, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, characterized in that: When the processor runs the computer program, the processor performs the steps of the method according to any one of claims 1 to 18.

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