CN115734331A

CN115734331A - Method and device for transmitting synchronization block

Info

Publication number: CN115734331A
Application number: CN202111000342.XA
Authority: CN
Inventors: 周欢
Original assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Current assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2023-03-03

Abstract

The embodiment of the application discloses a method and a device for transmitting a synchronous block, wherein the method comprises the following steps: the first device receives a physical sidelink broadcast channel PSBCH, the PSBCH is located in a first staggered resource set, the first staggered resource is a frequency domain resource, and the PSBCH is sent in a staggered resource mode, so that the SL-SSB sending can meet the OCB requirement of an unlicensed spectrum.

Description

Method and device for transmitting synchronization block

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting a synchronization block.

Background

Currently, a study on a vehicular wireless communication technology (V2X) Sidelink (SL) is introduced in Release 16. Sidelink Synchronization signals and PSBCH blocks (SL-SSB) transmitted in Sidelink (SL) transmission also include Sidelink-Primary Synchronization Signal (SL-PSS), sidelink-Secondary Synchronization Signal (SL-SSS), and Physical Sidelink-Physical broadcast Channel (PSBCH). However, data transmission in the 3GPP unlicensed spectrum needs to meet an Occupied Channel Bandwidth (OCB) requirement, where the OCB requirement means that a transmission Channel on an unlicensed frequency band needs to occupy more than 80% of the Channel Bandwidth by a regulation, and the current SL-SSB cannot meet the OCB requirement of the unlicensed spectrum. Therefore, how to make the transmission of the SL-SSB meet the OCB requirement of the unlicensed spectrum is an urgent problem to be solved.

Disclosure of Invention

The embodiment of the application provides a method and a device for transmitting a synchronization block, which can enable the transmission of an SL-SSB to meet the OCB requirement of an unlicensed spectrum.

In a first aspect, an embodiment of the present application provides a method for transmitting a synchronization block, where the method includes:

the terminal equipment receives a physical side downlink broadcast channel PSBCH, wherein the PSBCH is located in a first interleaving resource set, and the first interleaving resource set is a frequency domain resource.

In a second aspect, an embodiment of the present application provides a method for transmitting a synchronization block, where the method includes:

the network equipment sends a physical sidelink broadcast channel PSBCH, wherein the PSBCH is positioned in a first interleaving resource set, and the first interleaving resource set is a frequency domain resource.

In a third aspect, an apparatus for transmitting a synchronization block provided in an embodiment of the present application includes:

a transceiving unit, configured to receive a physical sidelink broadcast channel PSBCH, where the PSBCH is located in a first interleaved resource set, and the first interleaved resource set is a frequency domain resource.

In a fourth aspect, an embodiment of the present application provides an apparatus for transmitting a synchronization block, where the apparatus includes:

a transceiving unit, configured to send a physical sidelink broadcast channel PSBCH, where the PSBCH is located in a first interleaved resource set, and the first interleaved resource set is a frequency domain resource.

In a fifth aspect, a chip provided in an embodiment of the present application is configured to receive a physical sidelink broadcast channel PSBCH, where the PSBCH is located in a first interleaved resource set, and the first interleaved resource set is a frequency domain resource.

In a sixth aspect, an embodiment of the present application provides a chip module, which includes a transceiver module and a chip, wherein,

the chip is configured to receive a physical sidelink broadcast channel PSBCH through the transceiving component, where the PSBCH is located in a first interleaved resource set, and the first interleaved resource set is a frequency domain resource.

In a seventh aspect, a chip provided in an embodiment of the present application is configured to send a physical sidelink broadcast channel PSBCH, where the PSBCH is located in a first interleaved resource set, and the first interleaved resource set is a frequency domain resource.

In an eighth aspect, an embodiment of the present application provides a chip module, which includes a transceiver module and a chip,

the chip is configured to send a physical sidelink broadcast channel PSBCH through the transceiving component, where the PSBCH is located in a first interleaved resource set, and the first interleaved resource set is a frequency domain resource.

In a ninth aspect, embodiments of the present application provide an electronic device, which includes a processor, a memory, a communication interface, and one or more programs, stored in the memory and configured to be executed by the processor, the programs including instructions for performing some or all of the steps described in the method of the first or second aspect.

In a tenth aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program for electronic data exchange, where the computer program causes a computer to perform some or all of the steps described in the method of the first or second aspect.

In an eleventh aspect, embodiments of the present application provide a computer program product comprising instructions, which, when run on an electronic device, cause the electronic device to perform the method of the first or second aspect.

According to the technical scheme, the terminal equipment receives a physical sidelink broadcast channel PSBCH sent by the network equipment, the PSBCH is located in a first staggered resource set, the first staggered resource set is a frequency domain resource, and the PSBCH is sent in a staggered resource interlace mode, so that the SL-SSB sending can meet the OCB requirement of an unlicensed spectrum.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application;

fig. 2 is a flowchart illustrating a method for transmitting a synchronization block according to an embodiment of the present application;

FIG. 2a is a schematic diagram illustrating a structure of an interleaved resource set according to an embodiment of the present application;

fig. 3 is a schematic flowchart of another method for transmitting a synchronization block according to an embodiment of the present application;

fig. 4 is a flowchart illustrating another method for transmitting a synchronization block according to an embodiment of the present application;

fig. 5 is a flowchart illustrating another method for transmitting a synchronization block according to an embodiment of the present application;

fig. 6 is a flowchart illustrating another method for transmitting a synchronization block according to an embodiment of the present application;

fig. 7 is a block diagram illustrating functional units of a device for transmitting a synchronization block according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

Referring to fig. 1, fig. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present disclosure. As shown in fig. 1, the wireless communication system may include a network device 100, and a transmitting terminal 201 and a receiving terminal 202 that perform uplink/downlink communication with the network device 100. Sidelink communication between transmitting terminal 201 and receiving terminal 202

The sidelink communications may include, among other things, unicast communications, multicast communications, and broadcast communications. The application is applicable to unicast communication. Here, the unicast communication means that one transmitting terminal transmits data to one receiving terminal. Multicast communication refers to a transmission terminal transmitting data to a plurality of reception terminals. Broadcast communication means that one transmitting terminal transmits data to all terminals, and any one terminal can receive data as a receiving terminal.

The network device 100 may be a device capable of communicating with a receiving terminal/transmitting terminal. The network device 100 may be any device having a wireless transceiving function. Including but not limited to: a base station (NodeB), an evolved node b (eNodeB), a base station in the fifth generation (5G) communication system, a base station or network device in a future communication system, an access node in a Wi-Fi system, a wireless relay node, a wireless backhaul node, and the like. The network device 100 may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario. The network device 100 may also be a small station, a Transmission Reference Point (TRP), or the like. The embodiments of the present application do not limit the specific technologies and the specific device forms used by the network devices.

The transmitting terminal 201 and the receiving terminal 202 are devices having a wireless transceiving function, and may be disposed in a vehicle. The transmitting terminal 201 and the receiving terminal 202 may be mobile phones (mobile phones), tablet computers (pads), computers with wireless transmitting and receiving functions, wireless terminals in self-driving (self-driving), wireless terminals in transportation safety (transportation safety), and the like. A terminal device may also sometimes be referred to as a User Equipment (UE), an access terminal device, a UE unit, a mobile station, a remote terminal device, a mobile device, a terminal (terminal), a wireless communication device, a UE agent, or a UE apparatus, etc.

In this application, the first device may be a receiving terminal 202, and the second device may be a sending terminal 201. The second device may transmit the PSBCH to the first device in a resource interleaving manner to synchronize the first device with the second device.

For example, the first device may also transmit the PSBCH to the second device in a resource interleaving manner, so that the second device synchronizes with the first device.

The unlicensed frequency band is a frequency band that can be used for free, and different devices can share time-frequency resources on the unlicensed frequency band. Before the network device and the terminal device use the unlicensed frequency band for data transmission, the terminal device and the network device are first required to be synchronized on the unlicensed frequency band. The network equipment sends a synchronization signal to the terminal equipment, and the terminal equipment analyzes and acquires the time information according to the synchronization signal, so that the terminal equipment and the network equipment are synchronized. In a wireless communication system operating in an unlicensed frequency band, such as an NR system, a synchronization signal is transmitted using SSB as a basic unit. The SSB includes PSS and SSS, and optionally, the SSB may further include PBCH. The synchronization signal sent by the network device to the terminal device may be regarded as an SS Burst Set, and the SS Burst Set may include multiple SSBs.

Currently, a study on V2X Sidelink (SL) is introduced in Release 16. The SL-SSB transmitted in SL transmission also contains SL-PSS, SL-SSS, PSBCH. However, data transmission in the 3GPP unlicensed spectrum needs to meet the OCB requirement, which means that the transmission channel on the unlicensed frequency band needs to occupy more than 80% of the channel bandwidth by the regulations, and at present, the SL-SSB cannot meet the OCB requirement of the unlicensed spectrum. Therefore, how to make the transmission of the SL-SSB meet the OCB requirement of the unlicensed spectrum is an urgent problem to be solved.

In order to solve the above problem, the present application proposes a transmission method of a synchronization block, which transmits SL-SS (including SL-PSS and SL-SSs) in 11 consecutive RBs and PSBCH in an interleaved resource manner, so that the SL-SSB transmission can satisfy the OCB requirement of the unlicensed spectrum.

In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 2, fig. 2 is a flowchart illustrating a method for transmitting a synchronization block according to an embodiment of the present application, applied to the wireless communication system shown in fig. 1. As shown in fig. 2, the method includes the following steps.

S210, the second device sends a physical sidelink broadcast channel PSBCH, wherein the PSBCH is located in a first interleaving resource set, and the first interleaving resource is a frequency domain resource.

In the embodiment of the present application, it is required in the unlicensed spectrum that the bandwidth occupied by the actual transmission of the signal occupies more than 80% of the system bandwidth (i.e. the declared bandwidth), i.e. the OCB of the signal should be greater than 80%. Therefore, the present application transmits SL-SS in 11 consecutive RBs, while PSBCH is transmitted in an interleaved resource set (interlace), i.e., PSBCH is located on a plurality of RBs uniformly distributed at equal intervals, so that SL-SSB transmission meets OCB requirements in unlicensed spectrum.

The PSBCH and the SL-SS are located in the same RB set, the SL-SS is located on a first resource block RB group, and the first resource block RB comprises a plurality of RBs.

In NR systems, the bandwidth range of one carrier and/or a fractional Bandwidth (BWP) is large, which may be greater than 20MHz. Therefore, when the bandwidth of the carrier and/or BWP is greater than 20MHz, the carrier and/or BWP may be divided into a plurality of RB sets (sets), each RB set being 20MHz contiguous in the frequency domain, where the 20MHz contiguous set includes a first RB group carrying SL-SS and a first interleaved resource set carrying PSBCH, thereby making OCB requirements in the SL-SSB unlicensed spectrum.

The first RB group and the first interleaved resource set are frequency domain resources in an unlicensed frequency band, the SL-SS occupies 11 consecutive RBs in a frequency domain, that is, the first RB may include 11 consecutive RBs, and a center frequency point position of the first RB group may be configured by a high layer signaling SL-absolutefrequency ssb.

It should be noted that, in the current standard, a central frequency point is configured by a high-layer signaling sl-absolutefrequency ssb, but signaling or messages with the same meaning specified in other standards are also applicable to the present application, that is, the present application does not limit the signaling or messages configuring the central frequency point.

Specifically, one interlace includes 10 or 11 RBs, each interlace is a basic unit of resource allocation, and one interlace includes 10 or 11 PRBs in a subcarrier interval of 20MHz bandwidth and 15kHz, for a total of 10 interlaces. The interlace is uniformly distributed in the frequency domain, for example, interlace 0 is composed of RB #0, RB #10, RB #20, RB #30, RB #40, RB #50, RB #60, RB #70, RB #80, RB #90 and RB #100. As shown in FIG. 2a, one interlace in a 20MHz bandwidth and 30kHz subcarrier interval contains 10 or 11 RBs uniformly distributed in the frequency domain, and the total number is 5 interlaces. For example, interlace 0 includes RB #0, RB #10, RB #20, RB #30, RB #40, RB #50, RB #60, RB #70, RB #80, RB #90, and RB #100. Therefore, the frequency domain span formed by each interlace (namely the bandwidth span of the first RB and the last RB of the interlace) is 91 RBs, the bandwidth occupied by 91 RBs is 16.38MHz and is greater than 80% of the system bandwidth 20MHz, and the OCB regulatory requirement is met, so that the OCB requirement in the SL-SSB unlicensed spectrum is met.

S220, the first device receives the PSBCH.

The first equipment receives SL-SSB, wherein the SL-SSB comprises SL-SS and PSBCH, and the SL-SS comprises SL-PSS and SL-SSS. The first device carries out frame synchronization and frequency synchronization by detecting the SL-PSS and the SL-SSS, reads a physical sidelink broadcast channel PSBCH after obtaining the frame synchronization and the frequency synchronization, and obtains the system frame number and the bandwidth information so as to realize the synchronization of side chain communication sending and receiving.

It can be seen that, in the method for transmitting a synchronization block provided by the present application, a first device receives a PSBCH sent by a second device, where the PSBCH is located in a first interleaved resource set, and the first interleaved resource set is a frequency domain resource.

Referring to fig. 3, fig. 3 is a flowchart illustrating another synchronization block transmission method according to an embodiment of the present disclosure, which is applied to the wireless communication system shown in fig. 1. As shown in fig. 3, the method includes the following steps.

S310, the second device sends a physical sidelink broadcast channel PSBCH, wherein the PSBCH is located in a fixed staggered resource set, the fixed staggered resource set comprises M RBs, and M is a positive integer.

In the embodiment of the present application, it is required that the bandwidth occupied by actual transmission of a signal occupies more than 80% of the system bandwidth in the unlicensed spectrum, that is, the OCB of the signal should be greater than 80%. Therefore, the present application transmits SL-SS in 11 consecutive RBs, while PSBCH is transmitted in a staggered resource set manner, i.e., PSBCH is located on a plurality of RBs uniformly distributed at equal intervals, so that SL-SSB transmission meets OCB requirements in unlicensed spectrum.

Optionally, the PSBCH and the SL-SS are located in the same RB set, and the SL-SS is located on a first resource block RB group, where the first resource block RB includes a plurality of RBs.

In NR systems, the bandwidth range of one carrier and/or a partial Bandwidth (BWP) is large, and the bandwidth may be larger than 20MHz. Therefore, when the bandwidth of the carrier and/or BWP is greater than 20MHz, the carrier and/or BWP may be divided into a plurality of RB sets (sets), each RB set being 20MHz contiguous in the frequency domain, where the 20MHz contiguous set includes a first RB group carrying SL-SS and a first interleaved resource set carrying PSBCH, thereby making OCB requirements in the SL-SSB unlicensed spectrum.

Wherein the first RB group and the first interleaved resource set are frequency domain resources in an unlicensed frequency band, the first interleaved resource set includes M RBs, and M is a positive integer.

Specifically, one interlace includes 10 or 11 RBs, each interlace is a basic unit of resource allocation, and one interlace includes 10 or 11 PRBs in a subcarrier interval of 20MHz bandwidth and 15kHz, for 10 interlaces. The interlace is uniformly distributed in the frequency domain, for example, interlace 0 is composed of RB #0, RB #10, RB #20, RB #30, RB #40, RB #50, RB #60, RB #70, RB #80, RB #90 and RB #100. As shown in FIG. 2a, one interlace in a 20MHz bandwidth and 30kHz subcarrier interval contains 10 or 11 RBs uniformly distributed in the frequency domain, and the total number is 5 interlaces. For example, interlace 0 includes RB #0, RB #10, RB #20, RB #30, RB #40, RB #50, RB #60, RB #70, RB #80, RB #90, and RB #100. Therefore, the frequency domain span formed by each interlace is 91 RBs, the bandwidth occupied by the 91 RBs is 16.38MHz and is greater than 80% of the system bandwidth by 20MHz, and the OCB regulatory requirement is met, so that the OCB requirement in the SL-SSB unlicensed spectrum is met.

In this embodiment, M may be 11,sl-SSB occupying 11 consecutive RBs in the frequency domain, SL-SS may transmit on 11 consecutive RBs in the center frequency point, and to ensure that the PSBCH is located in the interlace resource set including 11 RBs, the PSBCH may be transmitted using a fixed interlace resource set in the SL BWP. For example, the PSBCH is transmitted by an interleaved resource set 0 including 11 RBs.

For example, the PSBCH may also be sent by another interleaved resource set including 11 RBs, which is not limited in this application.

It should be noted that the fixed interleaving resource set may be defined in a protocol, such as the protocol defines that PSBCH is transmitted using interleaving resource set 0; the fixed interleaving Resource may also be configured by a network through a high-level signaling (e.g., radio Resource Control (RRC) signaling, media Access Control (MAC) signaling, downlink Control Information (DCI), and the like), which is not limited in this embodiment of the present application.

S320, the first device receives the PSBCH.

The first equipment receives SL-SSB, wherein the SL-SSB comprises SL-SS and PSBCH, and the SL-SS comprises SL-PSS and SL-SSS. The first device may receive the SL-SS at a center frequency location configured by the higher layer signaling SL-absolutefrequency ssb and then receive the PSBCH on a fixed set of interleaved resources. The first equipment carries out frame synchronization and frequency synchronization by detecting the SL-PSS and the SL-SSS, reads a physical sidelink broadcast channel PSBCH after obtaining the frame synchronization and the frequency synchronization, and obtains the system frame number and the bandwidth information so as to realize the synchronization of side chain communication sending and receiving.

In the embodiment of the present application, the second device may enable the SL-SSB transmission to satisfy the OCB requirement of the unlicensed spectrum by transmitting the SL-SS by consecutive 11 RBs and transmitting the PSBCH by a fixed staggered resource set including 11 RBs.

Referring to fig. 4, fig. 4 is a flowchart illustrating another transmission method of a synchronization block according to an embodiment of the present application, which is applied to the wireless communication system shown in fig. 1. As shown in fig. 4, the method includes the following steps.

S410, the second device sends a physical sidelink broadcast channel PSBCH and a sidelink synchronization signal SL-SS, wherein the SL-SS is located in a first RB group, the first RB group comprises a plurality of RBs, the PSBCH is located in a first interleaved resource set, the first interleaved resource set is an interleaved resource set to which a first RB belongs, and the first RB is the RB with the smallest index number in the first RB group.

In the embodiment of the present application, it is required that the bandwidth occupied by actual transmission of a signal occupies more than 80% of the system bandwidth in the unlicensed spectrum, that is, the OCB of the signal should be greater than 80%. Therefore, the present application transmits the SL-SS in 11 consecutive RBs, and the PSBCH is transmitted in an interleaved resource (interlace) manner, i.e., the PSBCH is located on a plurality of RBs uniformly distributed at equal intervals, so that the SL-SSB transmission meets the OCB requirement in the unlicensed spectrum.

Optionally, the PSBCH and the SL-SS are located in the same RB set.

Specifically, one interlace includes 10 or 11 RBs, each interlace is a basic unit of resource allocation, and one interlace includes 10 or 11 PRBs in a subcarrier interval of 20MHz bandwidth and 15kHz, for a total of 10 interlaces. The interlace is uniformly distributed in the frequency domain, for example, interlace 0 is composed of RB #0, RB #10, RB #20, RB #30, RB #40, RB #50, RB #60, RB #70, RB #80, RB #90 and RB #100. As shown in fig. 2a, one interlace in a subcarrier interval of 30kHz with a bandwidth of 20MHz includes 10 or 11 RBs uniformly distributed in the frequency domain, for a total of 5 interlaces. For example, interlace 0 includes RB #0, RB #10, RB #20, RB #30, RB #40, RB #50, RB #60, RB #70, RB #80, RB #90, and RB #100. Therefore, the frequency domain span formed by each interlace (namely the bandwidth span of the first RB and the last RB of the interlace) is 91 RBs, the bandwidth occupied by 91 RBs is 16.38MHz and is greater than 80% of the system bandwidth 20MHz, and the OCB regulatory requirement is met, so that the OCB requirement in the SL-SSB unlicensed spectrum is met.

Optionally, the first interleaved resource set includes M RBs, where M is a positive integer.

In this embodiment of the present application, SL-SSB occupies 11 consecutive RBs in a frequency domain, SL-SS may transmit on 11 consecutive RBs of a central frequency point, PSBCH may transmit in an interleaved resource set to which an RB with a smallest index number occupied by SL-SS belongs, where the interleaved resource set includes 11 RBs, and M is 11, that is, the first interleaved resource set may be any interleaved resource set determined according to the RB occupied by SL-SS.

Wherein, the RB index may be a relative index of the RB, that is, the index may be an index of the frequency domain position of the RB relative to the BWP start position; the RB index may also be an absolute index of the RB, that is, the RB may be an index of a frequency domain location where the network device configures the RB, which is not limited in this embodiment of the present application.

For example, if the RB with the smallest index number among the 11 RBs occupied by the SL-SS is RB2, the interlace to which RB2 belongs is interlace 2, where interlace 2 includes 11 RBs, so that the second device can map the PSBCH using 11 RBs in interlace 2.

S420, the first device receives the PSBCH and the SL-SS.

The first equipment receives SL-SSB, wherein the SL-SSB comprises SL-SS and PSBCH, and the SL-SS comprises SL-PSS and SL-SSS. The first device receives the SL-SS at a central frequency point position which can be configured in a high-level signaling SL-Absolute frequency SSB, and then determines the frequency domain position of the PSBCH according to the frequency domain position of the SL-SS, namely receives the PSBCH in an interleaving resource set to which the RB with the minimum index number occupied by the SL-SS belongs.

Further, the first device performs frame synchronization and frequency synchronization by detecting the SL-PSS and the SL-SSS, and reads a physical sidelink broadcast channel PSBCH after obtaining the frame synchronization and the frequency synchronization, so as to obtain the system frame number and the bandwidth information, thereby realizing the synchronization of side-chain communication transmission and reception.

In the embodiment of the application, the second device may enable the SL-SSB transmission to meet the OCB requirement of the unlicensed spectrum by transmitting the SL-SS by 11 consecutive RBs and transmitting the PSBCH by an interleaved resource set to which the RB with the smallest index number occupied by the SL-SS belongs.

Referring to fig. 5, fig. 5 is a flowchart illustrating another transmission method of a synchronization block according to an embodiment of the present application, which is applied to the wireless communication system shown in fig. 1. As shown in fig. 5, the method includes the following steps.

S510, the first device sends a PSBCH (physical sidelink broadcast channel), wherein the PSBCH is located in a first staggered resource set, the first staggered resource set is a staggered resource set to which a second RB belongs, and the second RB is an RB where a central frequency point is located.

In the embodiment of the present application, it is required that the bandwidth occupied by actual transmission of a signal occupies more than 80% of the system bandwidth in the unlicensed spectrum, that is, the OCB of the signal should be greater than 80%. The present application therefore transmits SL-SS in 11 consecutive RBs while PSBCH is transmitted in a staggered resource fashion, i.e., PSBCH is located on a plurality of RBs evenly distributed at equal intervals, so that SL-SSB transmission meets OCB requirements in unlicensed spectrum.

The first RB group and the first interleaved resource set are frequency domain resources in an unlicensed frequency band, SL-SS occupies 11 consecutive RBs in the frequency domain, that is, the first RB group may include 11 consecutive RBs, and the center frequency point position of the first RB group may be configured by a high-level signaling SL-absolutefrequency ssb.

It should be noted that, in the current standard, it is defined that a central frequency point is configured by a high-level signaling sl-absolutefrequency ssb, but signaling or messages with the same meaning specified in other standards are also applicable to the present application, that is, the present application does not limit signaling or messages configuring the central frequency point.

Specifically, one interlace includes 10 or 11 RBs, each interlace is a basic unit of resource allocation, and one interlace includes 10 or 11 PRBs in a subcarrier interval of 20MHz bandwidth and 15kHz, for 10 interlaces. The interlace is uniformly distributed in the frequency domain, for example, interlace 0 is composed of RB #0, RB #10, RB #20, RB #30, RB #40, RB #50, RB #60, RB #70, RB #80, RB #90 and RB #100. As shown in FIG. 2a, one interlace in a 20MHz bandwidth and 30kHz subcarrier interval contains 10 or 11 RBs uniformly distributed in the frequency domain, and the total number is 5 interlaces. For example, interlace 0 includes RB #0, RB #10, RB #20, RB #30, RB #40, RB #50, RB #60, RB #70, RB #80, RB #90, and RB #100. Therefore, the frequency domain span formed by each interlace (namely the bandwidth span of two RBs at the head and the tail of the interlace) is 91 RBs, the bandwidth occupied by the 91 RBs is 16.38MHz and is greater than 80% of the system bandwidth by 20MHz, and the OCB regulatory requirement is met, so that the OCB requirement in the SL-SSB unlicensed spectrum is met.

In this embodiment of the present application, M may be 11,sl-SSB occupying 11 consecutive RBs in the frequency domain, SL-SS may transmit over 11 consecutive RBs, a center frequency point of the 11 consecutive RBs may be configured by high-layer signaling SL-absolutefrequency SSB, and PSBCH may transmit in an interlace resource set to which RBs of the center frequency point of the 11 consecutive RBs occupied by SL-SS belong. Wherein the interleaved resource set includes 11 RBs, the second device transmits the PSBCH in the interleaved resource set including 11 RBs without fail by limiting a transmission position of the PSBCH.

For example, if the interlace resource set to which the RB having the center frequency configured by the higher layer signaling sl-absolutefrequency ssb belongs does not include 11 RBs, the PSBCH is no longer transmitted in the interlace resource set.

For example, if the RB of the central frequency point configured by the sl-absolutefrequency ssb is RB12, the interlace to which RB12 belongs is interlace 2, and the interlace 2 includes 11 RBs, the second device may map the PSBCH using 11 RBs in the interlace 2. If interlace 2 includes 10 RBs, the second device may map the PSBCH using interlace 2.

S520, the first device receives the PSBCH.

The first equipment receives SL-SSB, wherein the SL-SSB comprises SL-SS and PSBCH, and the SL-SS comprises SL-PSS and SL-SSS. The first device may receive the SL-SS at a center frequency point position configured by the higher layer signaling SL-absolutefrequency ssb, then determine a frequency domain position of the PSBCH according to the configured center frequency point, and receive the PSBCH on an interlace resource set to which the RB at which the center frequency point belongs.

Further, the first device performs frame synchronization and frequency synchronization by detecting the SL-PSS and the SL-SSS, and after obtaining the frame synchronization and the frequency synchronization, reads a physical sidelink broadcast channel PSBCH, and obtains the system frame number and the bandwidth information, thereby realizing the synchronization of side-chain communication transmission and reception.

In this embodiment of the present application, the second device sends the SL-SS by using 11 consecutive RBs, and sends the PSBCH by using the staggered resource set to which the RB of the central frequency point configured by the high-layer signaling SL-absolutefrequency SSB belongs, so that the SL-SSB sending can meet the OCB requirement of the unlicensed spectrum.

Referring to fig. 6, fig. 6 is a flowchart illustrating another transmission method of a synchronization block according to an embodiment of the present disclosure, and the method is applied to the wireless communication system shown in fig. 1. As shown in fig. 6, the method includes the following steps.

S610, a first device sends a side-link synchronization signal SL-SS and a physical side-link broadcast channel PSBCH, wherein the SL-SS is located on a first resource block RB group, the first RB group comprises a plurality of RBs, the PSBCH is located in a first interleaved resource set, the first interleaved resource set is an interleaved resource set to which a third RB belongs, the third RB is an RB with the smallest index number of M RBs in the interleaved resource set to which the RBs in the first RB group belong, and M is a positive integer.

Optionally, the PSBCH and the SL-SS are located in the same RB set.

Specifically, one interlace includes 10 or 11 RBs, each interlace is a basic unit of resource allocation, and one interlace includes 10 or 11 PRBs in a subcarrier interval of 20MHz bandwidth and 15kHz, for 10 interlaces. The interlace is uniformly distributed in the frequency domain, for example, interlace 0 is composed of RB #0, RB #10, RB #20, RB #30, RB #40, RB #50, RB #60, RB #70, RB #80, RB #90 and RB #100. As shown in fig. 2a, one interlace in a subcarrier interval of 30kHz with a bandwidth of 20MHz includes 10 or 11 RBs uniformly distributed in the frequency domain, for a total of 5 interlaces. For example, interlace 0 includes RB #0, RB #10, RB #20, RB #30, RB #40, RB #50, RB #60, RB #70, RB #80, RB #90, and RB #100. Therefore, the frequency domain span formed by each interlace (namely the bandwidth span of the first RB and the last RB of the interlace) is 91 RBs, the bandwidth occupied by 91 RBs is 16.38MHz and is greater than 80% of the system bandwidth 20MHz, and the OCB regulatory requirement is met, so that the OCB requirement in the SL-SSB unlicensed spectrum is met.

In this embodiment, M may be 11,sl-SSB occupying 11 consecutive RBs in the frequency domain, SL-SS may transmit on 11 consecutive RBs, and PSBCH may transmit in an interleaved resource set, in which interleaved resources to which RBs belong in the RBs occupied by SL-SS belong include an RB with the smallest index number of 11 RBs, so that the PSBCH can satisfy the OCB requirement of the unlicensed spectrum.

Specifically, the first device starts from the RB with the smallest index number in the first RB group, and if the interleaved resource set to which the RB with the smallest index number belongs in the first RB group includes 11 RBs, the second device sends a PSBCH on the interleaved resource set to which the RB with the smallest index number belongs; and if the interleaved resource set to which the RB with the smallest index number belongs in the first RB group does not comprise 11 RBs, searching the RB with the smallest index number in the first RB group. If 11 RBs are included in the interleaved resource set to which the RB with the small index number belongs in the first RB group, the second device sends PSBCH on the interleaved resource set to which the RB with the small index number belongs; and if the interleaved resource set to which the RB with the second smallest index number belongs in the first RB group does not comprise 11 RBs, searching the RB with the third smallest index number in the first RB group until the RB with the smallest index number of the 11 RBs in the interleaved resource set to which the first RB belongs is searched according to the method.

For example, if the RB with the smallest index number among 11 RBs occupied by the SL-SS is RB9, the interlace to which RB9 belongs is interlace9, and the interlace9 only includes 11 RBs, the second device maps the PSBCH using interlace 9.

For another example, if the RB with the smallest index number among 11 RBs occupied by the SL-SS is RB9, and the interlace to which RB9 belongs is interlace9, but the interlace9 only includes 10 RBs, this interlace9 cannot be used to map the PSBCH. The second device searches for an RB from the frequency domain location upward, from an RB 10 with the next smallest index number among 11 RBs occupied by the SL-SS. If interlace 0 to which RB 10 belongs includes 11 RBs, PSBCH is mapped using 11 RBs in interlace 0. If interlace 0 to which RB 10 belongs still includes 10 RBs, continue searching for RBs from the frequency domain position upward until the interlace to which the searched RBs belong includes 11 RBs.

S620, the first device receives the SL-SS and the PSBCH.

The first equipment receives SL-SSB, wherein the SL-SSB comprises SL-SS and PSBCH, and the SL-SS comprises SL-PSS and SL-SSS. The first device receives the SL-SS at a central frequency point position which can be configured by a high-level signaling SL-Absolute frequency SSB, then determines the frequency domain position of the PSBCH according to the frequency domain position of the SL-SS, and receives the PSBCH on an interleaved resource set which belongs to the RB which is occupied by the SL-SS and contains the least index number of 11 RBs.

In this embodiment, the second device may enable the SL-SSB transmission to meet the OCB requirement of the unlicensed spectrum by transmitting the SL-SS in 11 consecutive RBs, and transmitting the PSBCH in an interleaved resource set including the interleaved resource set to which the RB with the smallest index number of 11 RBs belongs, among the RBs occupied by the SL-SS.

The above description has introduced the solution of the embodiment of the present application mainly from the perspective of the method-side implementation process. It will be appreciated that the second device, in order to carry out the above-described functions, comprises corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the present application is capable of hardware or a combination of hardware and computer software implementing the various illustrative elements and algorithm steps described in connection with the embodiments provided herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

Referring to fig. 7, fig. 7 is a block diagram illustrating functional units of an apparatus 700 for transmitting a synchronization block according to an embodiment of the present disclosure, where the apparatus 700 may be applied to a first device, and the apparatus 700 may also be applied to a second device, and the apparatus 700 includes: a transceiving unit 710.

In a possible implementation manner, the apparatus 700 is configured to execute each flow and step corresponding to the first device in the indication method.

A transceiving unit 710, configured to receive a physical sidelink broadcast channel PSBCH, where the PSBCH is located in a first interleaved resource set, and the first interleaved resource set is a frequency domain resource.

Optionally, the PSBCH and the sidelink synchronization signal SL-SS are located in the same RB set, and the SL-SS is located in a first RB group, where the first RB group includes a plurality of RBs.

Optionally, the first interleaved resource set is a fixed interleaved resource set, the fixed interleaved resource set includes M RBs, and M is a positive integer.

Optionally, the first interleaved resource set is an interleaved resource set to which a first RB belongs, and the first RB is an RB with a smallest index number in the first RB group.

Optionally, the first interleaved resource set is an interleaved resource set to which a second RB belongs, and the second RB is an RB in which the center frequency point is located.

Optionally, the first interleaved resource set includes M RBs.

Optionally, the first interleaved resource set is an interleaved resource set to which a third RB belongs, and the third RB is an interleaved resource set to which RBs in the first RB group belong and includes an RB with a minimum index number of M RBs.

In another possible implementation manner, the apparatus 700 is configured to execute the various processes and steps corresponding to the second device in the indication method.

The transceiver unit 710 is configured to send a physical sidelink broadcast channel PSBCH, where the PSBCH is located in a first interleaved resource set, and the first interleaved resource set is a frequency domain resource.

Optionally, the first interleaved resource set is a fixed interleaved resource set, the fixed interleaved resource set includes M RBs, where M is a positive integer.

Optionally, the first interleaved resource set includes M RBs.

It should be appreciated that the apparatus 700 herein is embodied in the form of a functional unit. The term "unit" herein may refer to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an alternative example, it may be understood by those skilled in the art that the apparatus 700 may be specifically the first device in the foregoing embodiment, and the apparatus 700 may be configured to execute each procedure and/or step corresponding to the first device in the foregoing method embodiment, and details are not described herein again to avoid repetition.

The apparatus 700 of each of the above aspects has functions of implementing corresponding steps executed by the first device in the above method; the functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software comprises one or more modules corresponding to the functions; for example, the transceiving unit 710 may be replaced by a transmitter, and perform transceiving operations and related processing operations in the respective method embodiments, respectively.

In an embodiment of the present application, the apparatus 700 may also be a chip or a chip system, for example: system on chip (SoC). Correspondingly, the detection unit may be a detection circuit of the chip, and is not limited herein.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a first device according to an embodiment of the present disclosure, where the first device includes: one or more processors, one or more memories, one or more communication interfaces, and one or more programs; the one or more programs are stored in the memory and configured to be executed by the one or more processors.

In one possible implementation, the electronic device is a first device, and the program includes instructions for performing the following steps:

receiving a physical sidelink broadcast channel PSBCH, wherein the PSBCH is located in a first interleaving resource set, and the first interleaving resource set is a frequency domain resource.

In another possible implementation manner, the electronic device is a second device, and the program includes instructions for performing the following steps:

and sending a physical sidelink broadcast channel PSBCH, wherein the PSBCH is positioned in a first staggered resource set, and the first staggered resource set is frequency domain resource.

All relevant contents of each scene related to the method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

It will be appreciated that the memory described above may include both read-only memory and random access memory, and provides instructions and data to the processor. The portion of memory may also include non-volatile random access memory. For example, the memory may also store device type information.

In the embodiment of the present application, the processor of the foregoing apparatus may be a Central Processing Unit (CPU), and the processor may also be other general processors, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It is to be understood that reference to "at least one" in the embodiments of the present application means one or more, and "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a alone, A and B together, and B alone, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

And, unless stated to the contrary, the embodiments of the present application refer to the ordinal numbers "first", "second", etc., for distinguishing a plurality of objects, and do not limit the sequence, timing, priority, or importance of the plurality of objects. For example, the first information and the second information are different information only for distinguishing them from each other, and do not indicate a difference in the contents, priority, transmission order, importance, or the like of the two information.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software elements in a processor. The software elements may be located in ram, flash, rom, prom, or eprom, registers, etc. as is well known in the art. The storage medium is located in a memory, and a processor executes instructions in the memory, in combination with hardware thereof, to perform the steps of the above-described method. To avoid repetition, it is not described in detail here.

The embodiment of the present application further provides a chip, where the chip is configured to receive a physical sidelink broadcast channel PSBCH, and the PSBCH is located in a first interleaved resource set, where the first interleaved resource set is a frequency domain resource.

The embodiment of the present application further provides a chip module, which includes a transceiver component and a chip, wherein the chip is configured to receive a physical sidelink broadcast channel PSBCH through the transceiver component, the PSBCH is located in a first interleaved resource set, and the first interleaved resource set is a frequency domain resource.

The embodiment of the present application further provides a chip, where the chip is configured to send a physical sidelink broadcast channel PSBCH, where the PSBCH is located in a first interleaved resource set, and the first interleaved resource set is a frequency domain resource.

The embodiment of the present application further provides a chip module, which includes a transceiver component and a chip, wherein the chip is configured to transmit a physical sidelink broadcast channel PSBCH through the transceiver component, the PSBCH is located in a first interleaved resource set, and the first interleaved resource set is a frequency domain resource.

Embodiments of the present application further provide a computer storage medium, where the computer storage medium stores a computer program for electronic data exchange, and the computer program makes a computer execute part or all of the steps of any one of the methods as described in the above method embodiments.

Embodiments of the present application further provide a computer program product including instructions, which, when run on an electronic device, cause the electronic device to perform some or all of the steps of any of the methods described in the above method embodiments.

It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units is only one type of division of logical functions, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present application.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may also be implemented in the form of a software functional unit.

The integrated unit may be stored in a computer readable memory if it is implemented in the form of a software functional unit and sold or used as a stand-alone product. Based on such understanding, the technical solutions of the present application, in essence or part of the technical solutions contributing to the prior art, or all or part of the technical solutions, can be embodied in the form of a software product, which is stored in a memory and includes several instructions for causing a computer device (which may be a personal computer, a server, or a TRP, etc.) to execute all or part of the steps of the methods of the embodiments of the present application. And the aforementioned memory comprises: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk, and various media capable of storing program codes.

Those skilled in the art will appreciate that all or part of the steps of the methods of the above embodiments may be implemented by a program, which is stored in a computer-readable memory, the memory including: flash disk, ROM, RAM, magnetic or optical disk, and the like.

The foregoing embodiments have been described in detail, and specific examples are used herein to explain the principles and implementations of the present application, where the above description of the embodiments is only intended to help understand the method and its core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A method for transmitting a synchronization block, the method comprising:

the first device receives a physical sidelink broadcast channel PSBCH, which is located in a first set of interleaved resources, which are frequency domain resources.

2. The method of claim 1, wherein the PSBCH and a sidelink synchronization signal SL-SS are located in a same set of resource blocks RB, and wherein the SL-SS is located in a first set of RBs, and wherein the first set of RBs comprises a plurality of RBs.

3. The method of claim 2, wherein the first set of interleaved resources is a fixed set of interleaved resources comprising M RBs, wherein M is a positive integer.

4. The method of claim 2, wherein the first interleaved resource set is an interleaved resource set to which a first RB belongs, and wherein the first RB is a RB of the first RB group with a smallest index number.

5. The method of claim 2, wherein the first interleaved resource set is an interleaved resource set to which a second RB belongs, and wherein the second RB is an RB in which a center frequency bin is located.

6. The method of claim 4 or 5, wherein the first interleaved resource set comprises M RBs.

7. The method of claim 2, wherein the first interleaved resource set is an interleaved resource set to which a third RB belongs, and wherein the interleaved resource set to which the RBs in the first RB group belong comprises the RB with the smallest index number of M RBs.

8. A method for transmitting a synchronization block, the method comprising:

the second device sends a physical sidelink broadcast channel PSBCH, which is located in a first interleaved resource set, and the first interleaved resource set is a frequency domain resource.

9. The method of claim 8, wherein the PSBCH and a sidelink synchronization signal SL-SS are located in a same set of resource blocks RB, and wherein the SL-SS is located in a first set of RBs, and wherein the first set of RBs comprises a plurality of RBs.

10. The method of claim 9, wherein the first set of interleaved resources is a fixed set of interleaved resources comprising M RBs, wherein M is a positive integer.

11. The method of claim 9, wherein the first interleaved resource set is an interleaved resource set to which a first RB belongs, and wherein the first RB is a RB of the first RB group with a smallest index number.

12. The method of claim 9, wherein the first interleaved resource set is an interleaved resource set to which a second RB belongs, and wherein the second RB is an RB in which a center frequency bin is located.

13. The method of claim 11 or 12, wherein the first interleaved resource set comprises M RBs.

14. The method of claim 9, wherein the first interleaved resource set is an interleaved resource set to which a third RB belongs, and wherein the interleaved resource set to which the RBs in the first RB group belong comprises the RB with the smallest index number of M RBs.

15. An apparatus for transmitting a synchronization block, the apparatus comprising:

16. An apparatus for transmitting a synchronization block, the apparatus comprising:

a transceiver unit, configured to send a physical sidelink broadcast channel PSBCH, where the PSBCH is located in a first interleaved resource set, and the first interleaved resource set is a frequency domain resource.

17. A chip configured to receive a Physical Sidelink Broadcast Channel (PSBCH), the PSBCH located on a first set of interleaved resources, the first set of interleaved resources being frequency domain resources.

18. A chip module comprises a transceiver module and a chip, wherein,

the chip is configured to receive a physical sidelink broadcast channel PSBCH through the transceiver component, where the PSBCH is located on a first interleaved resource set, and the first interleaved resource set is a frequency domain resource.

19. A chip configured to transmit a Physical Sidelink Broadcast Channel (PSBCH) on a first set of interleaved resources, the first set of interleaved resources being frequency domain resources.

20. A chip module comprises a transceiver module and a chip, wherein,

21. An electronic device, comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method of any of claims 1-7 or 8-14.

22. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes a computer to perform the steps of the method according to any of claims 1-7 or according to any of claims 8-14.