CN111565447B

CN111565447B - Sending method, receiving method and equipment for synchronous broadcast information

Info

Publication number: CN111565447B
Application number: CN201910114905.4A
Authority: CN
Inventors: 任晓涛; 郑方政; 赵锐
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-02-14
Filing date: 2019-02-14
Publication date: 2022-09-09
Anticipated expiration: 2039-02-14
Also published as: CN111565447A

Abstract

The embodiment of the application provides a sending method, a receiving method and equipment of synchronous broadcast information, which are used for improving the detection success rate of S-PSS. The method for sending the synchronous broadcast information comprises the following steps: the first device generates a through link-synchronization signal and a physical broadcast channel block S-SSB; wherein the S-SSB at least comprises a first direct link-primary synchronization signal S-PSS and a second S-PSS, and the sequence used by the first S-PSS is different from the sequence used by the second S-PSS; the first device sends the S-SSB.

Description

Sending method, receiving method and equipment for synchronous broadcast information

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and a device for sending and receiving synchronous broadcast information.

Background

In a New wireless (NR) Vehicle-to-X (V2X) system, a near field communication Port (PC 5) is used between a terminal device and a terminal device for direct communication, and before communication, synchronization needs to be established between the two terminal devices. Taking the terminal devices a and B as an example, if a and B need to communicate, synchronization needs to be established between the PC5 port of a and the PC5 port of B. Specifically, A sends a synchronous broadcast Signal to B, the synchronous broadcast Signal is carried in a direct link-synchronous Signal and physical broadcast channel Block (S-SSB), and after B receives the S-SSB sent by A and demodulates successfully, the Synchronization between A and B is established successfully.

Continuing with the above example, a sends a Synchronization broadcast Signal to B by using a beam scanning method, and in order to expand the coverage of the Synchronization broadcast Signal, a direct link Primary Synchronization Signal (S-PSS)/direct link Secondary Synchronization Signal (S-SSS) in the S-SSB uses time domain repetition. Referring to fig. 1, the abscissa in fig. 1 represents the time domain, each column represents an Orthogonal Frequency Division Multiplexing (OFDM) symbol, and the ordinate represents the frequency domain, where the aforementioned time domain repetition indicates that S-PSS occupies two OFDM symbols respectively, S-SSS occupies two OFDM symbols respectively, and in addition, Physical downlink Broadcast Channel (PSBCH) occupies 5 OFDM symbols, and Demodulation Reference Signal (DMRS) occupies 3 OFDM symbols for demodulating PSBCH. In addition, one slot (slot) includes 14 OFDM symbols, where the first OFDM symbol is used for Automatic Gain Control (AGC), i.e., for adjusting power Gain of a device receiving PSSS/SSSS/PSBCH, and the last OFDM symbol is used for countering transmission and reception delays caused by devices in different locations.

And B is lack of prior information when detecting the S-PSS, so that the detection success rate of the S-PSS is low. On the other hand, in the process of communication between a and B, since a and/or B may be in a high-speed motion state, when a and/or B is in a high-speed motion state, a doppler shift effect may occur between a and B, that is, the frequency of a received signal by B is different from the frequency of a transmitted signal by a, which may further affect the detection success rate of S-PSS. Therefore, the success rate of detecting S-PSS in the prior art is low.

Disclosure of Invention

The embodiment of the application provides a method for sending synchronous broadcast information, which is used for improving the detection success rate of S-PSS.

In a first aspect, the present application provides a method for transmitting synchronized broadcast information, which may be performed by a first device. The method comprises the following steps: the first device generates a through link-synchronization signal and a physical broadcast channel block S-SSB; wherein the S-SSB at least comprises a first direct link-primary synchronization signal S-PSS and a second S-PSS, and the sequence used by the first S-PSS is different from the sequence used by the second S-PSS; the first device sends the S-SSB.

In the embodiment of the present application, since the first S-PSS and the second S-PSS use different sequences, which is equivalent to using different codes, the degree of distortion to fading is different. Thus, when one S-PSS experiences deep fading and fails to detect, the detection of the synchronization sequence can be completed by using the sequence of the other S-PSS. Therefore, the Doppler frequency spectrum effect generated between the first equipment and the second equipment can be resisted, and the success rate of detecting the S-PSS is improved.

In the embodiment of the application, the sequence used by the first S-PSS and the sequence used by the second S-PSS can be different golden sequences, or different m sequences, or one golden sequence and one m sequence, and the sequence types used by the S-PSS are not limited herein.

In one possible design, the first S-PSS sequence is a first m-sequence and the second S-PSS sequence is a second m-sequence; wherein the generator polynomial of the first m-sequence is different from the generator polynomial of the second m-sequence; and/or the cyclic shift value of the first m-sequence is different from the cyclic shift value of the second m-sequence.

In the embodiment of the present application, when the first S-PSS sequence is a first m-sequence and the second S-PSS sequence is a second m-sequence, different m-sequences may be generated by different generator polynomials, or different m-sequences may be obtained by performing cyclic shift on the generated initial m-sequence, or generated by other ways, which is not limited herein.

In one possible design of the system,

the first m-sequence is an m-sequence of length 255; and/or

The second m-sequence is an m-sequence of length 255.

In one possible design, the S-SSB further includes:

at least one through link-secondary synchronization signal, S-SSS, one S-SSS of the at least one S-SSS occupying one time domain symbol;

at least one physical through-link broadcast channel (PSBCH) signal, one of which occupies one time-domain symbol.

In one possible design, the at least one S-SSS is used to demodulate the at least one PSBCH signal.

In one possible design, the S-SSB occupies 6 time domain symbols in total.

In one possible design of the system,

when the S-SSB comprises two S-SSSs, the two S-SSSs respectively occupy any two continuous time domain symbols or any two discontinuous time domain symbols except for two time domain symbols occupied by the first S-PSS and the second S-PSS in the 6 time domain symbols;

and when the S-SSB comprises two PSBCH signals, the two PSBCH signals respectively occupy the remaining two time domain symbols, wherein the remaining two time domain symbols are other time domain symbols except the time domain symbols occupied by the first S-PSS and the second S-PSS and the time domain symbols occupied by the two S-SSSs in the 6 time domain symbols.

In one possible design, when the waveform scheduled by the first device for the second device is an orthogonal frequency division multiplexing CP-OFDM waveform with cyclic prefix, the S-SSB further includes:

demodulating a reference signal (DMRS);

wherein the DMRS is frequency division multiplexed with the at least one PSBCH signal.

In one possible design, when the waveform scheduled by the first device for the second device is an orthogonal frequency division multiplexing DFT-S-OFDM waveform of discrete fourier transform spread spectrum, the S-SSB further includes:

at least one DMRS, one of which occupies one time domain symbol.

In one possible design, the first device sends the S-SSB, including:

the first device transmits at least two of the S-SSBs in one slot.

In the embodiment of the application, the first device can transmit at least two S-SSBs in one time slot to better resist the Doppler spectrum effect generated between the first device and the second device, so as to further improve the detection success rate of the S-PSS.

In a specific implementation process, the first device may determine, through current speed information, for example, a current velocity of the first device, or a relative velocity between the first device and the second device, a doppler shift amount between the first device and the second device, and further determine whether to send at least two S-SSBs in one timeslot.

In a second aspect, the present application provides a method of receiving synchronized broadcast information, the method being executable by a second device. The method comprises the following steps: the second equipment receives a direct link-synchronization signal and a physical broadcast channel block S-SSB sent by the first equipment; wherein the S-SSB at least comprises a first direct link-primary synchronization signal S-PSS and a second S-PSS, and the sequence used by the first S-PSS is different from the sequence used by the second S-PSS; the second device synchronizes with the first device according to the first S-PSS and/or the second S-PSS.

In one possible design of the system,

the sequence of the first S-PSS is a first m sequence, and the sequence of the second S-PSS is a second m sequence;

wherein the generator polynomial of the first m-sequence is different from the generator polynomial of the second m-sequence; and/or

The cyclic shift value of the first m-sequence is different from the cyclic shift value of the second m-sequence.

In one possible design of the system,

the first m-sequence is an m-sequence of length 255; and/or

The second m-sequence is an m-sequence of length 255.

In one possible design, the S-SSB further includes:

In one possible design, the method further includes:

the second apparatus demodulates the at least one PSBCH signal with the at least one S-SSS.

In one possible design, the S-SSB occupies 6 time domain symbols in total.

In one possible design of the system,

demodulating a reference signal (DMRS);

at least one DMRS, one of the at least one DMRS occupying one time domain symbol.

In one possible design, the second device receives a through link-synchronization signal and a physical broadcast channel block S-SSB sent by the first device, and includes:

the second device receives at least two of the S-SSBs in a slot.

In a third aspect, an embodiment of the present application provides a first device, including:

a memory to store instructions;

a processor for reading the instructions in the memory, performing the following processes:

generating a through link-synchronization signal and physical broadcast channel block S-SSB; wherein the S-SSB at least comprises a first direct link-primary synchronization signal S-PSS and a second S-PSS, and the sequence used by the first S-PSS is different from the sequence used by the second S-PSS;

a transmitter for transmitting the S-SSB.

In one possible design of the system,

the first m-sequence is an m-sequence of length 255; and/or

The second m-sequence is an m-sequence of length 255.

In one possible design, the S-SSB further includes:

In one possible design, the S-SSB occupies 6 time-domain symbols in total.

In one possible design of the system,

In one possible design, when the waveform scheduled by the first device for the second device is an orthogonal frequency division multiplexing CP-OFDM waveform with a cyclic prefix, the S-SSB further includes:

demodulating a reference signal (DMRS);

In one possible design, when the transmitter transmits the S-SSB, the transmitter is specifically configured to:

transmitting at least two of the S-SSBs in one slot.

In a fourth aspect, an embodiment of the present application provides a second device, including:

a receiver for receiving a through link-synchronization signal and a physical broadcast channel block S-SSB transmitted by a first device; wherein the S-SSB at least comprises a first direct link-primary synchronization signal S-PSS and a second S-PSS, and the sequence used by the first S-PSS is different from the sequence used by the second S-PSS;

a memory to store instructions;

synchronizing with the first device according to the first S-PSS and/or the second S-PSS.

In one possible design of the system,

In one of the possible designs of the device,

the first m-sequence is an m-sequence of length 255; and/or

The second m-sequence is an m-sequence of length 255.

In one possible design, the S-SSB further includes:

In one possible design of the system,

the at least one S-SSS is used to demodulate the at least one PSBCH signal.

In one possible design, the S-SSB occupies 6 time domain symbols in total.

In one possible design of the system,

demodulating a reference signal DMRS;

In one possible design, when the receiver receives the direct link-synchronization signal and the physical broadcast channel block S-SSB sent by the first device, the receiver is specifically configured to:

receiving at least two of the S-SSBs in one slot.

In a fifth aspect, embodiments of the present application provide a first device,

a generating unit for generating a through link-synchronization signal and a physical broadcast channel block S-SSB; wherein the S-SSB at least comprises a first direct link-primary synchronization signal S-PSS and a second S-PSS, and the sequence used by the first S-PSS is different from the sequence used by the second S-PSS;

and the sending unit is used for sending the S-SSB.

In one possible design of the system,

In one of the possible designs of the device,

the first m-sequence is an m-sequence of length 255; and/or

The second m-sequence is an m-sequence of length 255.

In one possible design, the S-SSB further includes:

In one possible design, the S-SSB occupies 6 time domain symbols in total.

In one possible design of the system,

demodulating a reference signal (DMRS);

In one possible design, when the waveform scheduled by the first device for the second device is an orthogonal frequency division multiplexing DFT-S-OFDM waveform of discrete fourier transform spread, the S-SSB further includes:

In a possible design, when the sending unit sends the S-SSB, the sending unit is specifically configured to:

transmitting at least two of the S-SSBs in one slot.

In a sixth aspect, an embodiment of the present application provides a second device, including:

a receiving unit, configured to receive a direct link-synchronization signal and a physical broadcast channel block S-SSB sent by a first device; wherein the S-SSB at least comprises a first direct link-primary synchronization signal S-PSS and a second S-PSS, and the sequence used by the first S-PSS is different from the sequence used by the second S-PSS;

a synchronization unit for synchronizing with the first device according to the first S-PSS and/or the second S-PSS.

In one possible design of the system,

In one of the possible designs of the device,

the first m-sequence is an m-sequence of length 255; and/or

The second m-sequence is an m-sequence of length 255.

In one possible design, the S-SSB further includes:

In one possible design, the S-SSB occupies 6 time-domain symbols in total.

In one possible design of the system,

demodulating a reference signal (DMRS);

In one possible design, when the waveform scheduled by the first device for the second device is an orthogonal frequency division multiplexing DFT-S-OFDM waveform with discrete fourier transform spreading, the S-SSB further includes:

In one possible design, when the receiving unit receives the direct link-synchronization signal and the physical broadcast channel block S-SSB sent by the first device, the receiving unit is specifically configured to:

receiving at least two of the S-SSBs in a slot.

In a seventh aspect, the present application provides a computer storage medium storing computer software instructions for executing the functions of any one of the first aspect, the first design of the first aspect, the second aspect, and the second design of the second aspect, or a program including instructions for executing the methods of any one of the first aspect, the first design of the first aspect, the second method, and the second design of the second aspect.

In an eighth aspect, the present application provides a computer program product, which when invoked by a computer causes the computer to perform the method of any of the first aspect, the second aspect and the second aspect.

In the embodiment of the application, because the sequences adopted by the two S-PSSs are different, which is equivalent to using different codes, the distortion degree of fading is different. Thus, when one S-PSS experiences deep fading and fails to detect, the sequence adopted by the other S-PSS can be used to complete the detection of the synchronization sequence. Therefore, the Doppler frequency spectrum effect generated between the first equipment and the second equipment can be resisted, and the success rate of detecting the S-PSS is improved.

In the embodiment of the present application, the names of the first device, the second device, the time domain symbol, and the like do not limit the technical features themselves, and in an actual implementation, the technical features may appear by other names. So long as the functions of the respective technical features are similar to those described in the embodiments of the present invention, they are within the scope of the claims of the present application and the equivalents thereof.

Drawings

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

FIG. 1 is a schematic diagram of the structure of a prior art S-SSB;

fig. 2 is a schematic view of an application scenario according to an embodiment of the present application;

fig. 3 is a flowchart of a method for sending synchronized broadcast information according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of an S-SSB provided in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of another S-SSB provided in the embodiments of the present application;

FIG. 6 is a schematic structural diagram of another S-SSB provided in the embodiments of the present application;

FIG. 7 is a schematic structural diagram of another S-SSB provided in the embodiments of the present application;

FIG. 8 is a schematic structural diagram of another S-SSB provided in an embodiment of the present application;

FIG. 9 is a schematic structural diagram of another S-SSB provided in the embodiments of the present application;

FIG. 10 is a schematic structural diagram of another S-SSB provided in the embodiments of the present application;

fig. 11 is a schematic diagram of transmitting two S-SSBs in one timeslot according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a first apparatus according to an embodiment of the present disclosure;

fig. 13 is a schematic structural diagram of a second apparatus according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of another first apparatus provided in an embodiment of the present application;

fig. 15 is a schematic structural diagram of another second apparatus according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

The technical solution described herein may be used in Long Term Evolution (LTE) or fifth generation mobile communication technology (5G) system, and may also be used in next generation mobile communication system.

Hereinafter, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

(1) The first device may be a transmitting device, e.g. a vehicle mounted device. It should be understood that, in the embodiment of the present application, the vehicle-mounted device is vehicle-mounted information installed inside an automobile, and is referred to as vehicle-mounted communication or vehicle-mounted entertainment product for short, and the vehicle-mounted device is required to be capable of functionally realizing information communication between a person and the automobile, between the automobile and the outside, and the like; the second device may be a receiving device, such as a vehicle mounted device, a roadside unit, or a mobile terminal, etc.

(2) The doppler spectrum effect means that when there is relative motion between the transmitting device and the receiving device, the frequency of the receiving device receiving the information transmitted by the transmitting device is different from the frequency of the information transmitted by the transmitting device. And the difference between the received frequency and the transmitted frequency is called the amount of doppler shift. In real life, when wireless communication is performed on a highly moving object (for example, a high-speed rail), a phenomenon such as degradation of signal quality occurs, which is an example of a doppler shift phenomenon of electromagnetic waves.

(3) M-sequences of which the generator polynomial is

Wherein, a _K ＝1,a ₀ 1, a sequence c (N) { c (N) | N ═ 0,1,2,. N-1} generated based on the generator polynomial g (x) satisfies the following recurrence relation,

. The initial state is c (k-1), c (k-2), c (k-3), …, c (1), c (0), and the sequence c (N) { c (N) | N ═ 0,1,2,.. N-1} can be obtained from the initial state value and the recurrence formula. When the generator polynomial is a primitive polynomial of degree K, the resulting sequence is an m-sequence of length N-2 ^K -1。

(4) Golden sequences, Golden sequences are sequences generated by modulo-2 addition of a pair of preferred m-sequences, such that the mutual correlation of Golden sequences is small. f. of ₁ (n),f ₂ (N) are two m-sequences of length N, g _m,k (n)＝(f ₁ ((n+m+k)modN)+f ₂ ((N + k) modN)) mod2, is a gold sequence of length N, where m is 0,1,2,. N-1, k is 0,1,2,. N-1. m, k, to generate a set of multiple different golden sequences.

(5) The terms "system" and "network" in embodiments of the present invention may be used interchangeably. The "plurality" means two or more, and in view of this, the "plurality" may also be understood as "at least two" in the embodiments of the present invention. "and/or" describes the association relationship of the associated object, indicating that there may be three relationships, for example, a and/or B, which may indicate: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" generally indicates that the preceding and following related objects are in an "or" relationship, unless otherwise specified.

In the embodiment of the application, because the sequences adopted by the two S-PSSs are different, which is equivalent to using different codes, the distortion degree of fading is different. Thus, when one S-PSS experiences deep fading and fails to detect, the detection of the synchronization sequence can be accomplished by using the sequence adopted by the other S-PSS. Therefore, the Doppler frequency spectrum effect generated between the first equipment and the second equipment can be resisted, and the success rate of detecting the S-PSS is improved.

Please refer to fig. 2, which is an application scenario of the embodiment of the present application. In fig. 2, an in-vehicle device and a receiving device are included. Wherein, the receiving device can be a vehicle, a roadside infrastructure device/network device, a mobile terminal of a pedestrian. The vehicle-mounted equipment and the receiving equipment perform up-and-down communication after synchronization is realized through the synchronous broadcast signals.

The technical scheme provided by the embodiment of the application is described below with reference to the accompanying drawings.

Referring to fig. 3, an embodiment of the present application provides a method for sending synchronized broadcast information, where the flow of the method is described as follows:

s301: the first equipment generates an S-SSB; wherein the S-SSB at least comprises a first S-PSS and a second S-PSS, and the sequence used by the first S-PSS is different from the sequence used by the second S-PSS.

In the following description process, taking an application of the technical solution provided by the present application to the application scenario shown in fig. 2 as an example, the first device may be an in-vehicle device, and the second device is a receiving device.

In the embodiment of the present application, since the first S-PSS and the second S-PSS use different sequences, which is equivalent to using different codes, the degree of distortion to fading is different. Thus, when one S-PSS experiences deep fading and fails to detect, the detection of the synchronization sequence can be completed by using the sequence of the other S-PSS. Therefore, the Doppler frequency spectrum effect generated between the vehicle-mounted equipment and the receiving equipment can be resisted, and the success rate of detecting the S-PSS is improved.

In the embodiment of the present application, the first S-PSS and the second S-PSS included in the S-SSB may occupy two consecutive time domain symbols, or may occupy two non-consecutive time domain symbols, which is not limited herein.

Further, the sequence used by the first S-PSS is different from that used by the second S-PSS. For example, the first S-PSS sequence and the second S-PSS sequence are different golden sequences, or the first S-PSS sequence and the second S-PSS sequence are different m sequences, or the first S-PSS sequence is a golden sequence and the second S-PSS sequence is an m sequence, which are only used as examples, and the types of the sequences used by the first S-PSS and the sequences used by the second S-PSS are not limited in the embodiments of the present application.

When the first S-PSS sequence and the second S-PSS sequence are different m sequences, the sequence used by the first S-PSS can be the first m sequence, and the sequence used by the second S-PSS can be the second m sequence; wherein the generator polynomial of the first m-sequence is different from the generator polynomial of the second m-sequence; and/or the cyclic shift value of the first m-sequence is different from the cyclic shift value of the second m-sequence.

In the embodiment of the present application, the first m-sequence and the second m-sequence may be generated based on the following ways, which are described separately below.

Generating m-sequences based on different generator polynomials

For example, the generator polynomial used to generate the first m-sequence is x ⁴ + x +1, the corresponding first m-sequence is 10011, and the generator polynomial for generating the second m-sequence is x ⁷ +x ³ +1, the corresponding second m-sequence is 10001001, and a different m-sequence is obtained.

Generating different m sequences by cyclic shift

First, an initial m-sequence may be generated according to a generator polynomial manner, and then the initial m-sequence may be circularly left-shifted or circularly right-shifted to obtain different m-sequences. It should be understood that, in the embodiments of the present application, the cyclic shift value refers to the number of bits that the initial sequence employed for generating the m-sequence is cyclically left-shifted or cyclically right-shifted.

Further, in the embodiment of the present application, the first m-sequence is an m-sequence of length 255; and/or the second m-sequence is an m-sequence of length 255. An example is given here, but of course the first m-sequence and the second m-sequence may be m-sequences of other lengths. And when the first m-sequence and the second m-sequence are 255 sequences in length, the corresponding S-SSB occupies 24 Resource Blocks (RBs) in the frequency domain, where 12 subcarriers are consecutive in the frequency domain, and one slot in the time domain is referred to as one RB. It should be understood that, in the embodiment of the present application, the time domain symbol and the subcarrier respectively represent granularity units of time frequency resources of transmission signals in the time domain and the frequency domain, and they may have meanings in the current communication system and may also have meanings in a future communication system. In addition, if their names are changed in the future communication system, they may be converted into names in the future communication system.

In the embodiment of the present application, when the waveforms scheduled by the vehicle-mounted device for the receiving device are different, the signals included in the S-SSB may also have a certain difference, which is described below:

the waveform scheduled for the receiving device at the vehicle-mounted device is a Cyclic Prefix orthogonal Frequency Division Multiplexing (CP-OFDM) waveform, and the structure of the S-SSB may be as follows:

example 1

The S-SSB further comprises: at least one S-SSS, one S-SSS of which occupies one time domain symbol; at least one PSBCH signal, one of which occupies one time-domain symbol.

In the embodiment of the present application, the S-SSB occupies 6 time domain symbols in total. When the S-SSB comprises two S-SSSs, the two S-SSSs respectively occupy two time domain symbols, and the two time domain symbols can be any two continuous time domain symbols except the time domain symbols occupied by the first S-PSS and the second S-PSS in the 6 time domain symbols or any two discontinuous time domain symbols. Correspondingly, when the S-SSB comprises two PSBCH signals, the two PSBCH signals respectively occupy two time domain symbols, the two time domain symbols can be the rest time domain symbols in the 6 time domain symbols, and the rest time domain symbols are the time domain symbols in the 6 time domain symbols except the time domain symbols occupied by the first S-PSS and the second S-PSS and the time domain symbols occupied by the two S-SSSs.

Here, it should be noted that when the S-SSB includes two PSBCH signals, the two PSBCH signals respectively occupy any two consecutive time domain symbols, or any two discontinuous time domain symbols, of the 6 time domain symbols except the time domain symbols occupied by the first S-PSS and the second S-PSS, and when the S-SSB includes two S-SSS, the two S-SSS occupy the remaining time domain symbols, and the remaining time domain symbols are the time domain symbols, of the 6 time domain symbols, except the time domain symbols occupied by the first S-PSS and the second S-PSS, and the time domain symbols occupied by the two PSBCH signals.

The following describes the case of S-SSS and PBSCH respectively occupying time domain symbols

1. Two S-SSSs occupy two continuous time domain signals, and two PSBCHs also occupy two continuous time domain symbols

In this case, two consecutive time domain symbols are occupied, and as to which of the two consecutive time domain symbols is not fixed, they are described separately below.

(1) Referring to FIG. 4, a first S-PSS and a second S-PSS occupy two time domain symbols denoted 1 and 2, two S-SSSs occupy two time domain symbols denoted 5 and 6, respectively, and two PSBCHs occupy time domain symbols denoted 3 and 4, respectively.

(2) Referring to FIG. 5, the first S-PSS and the second S-PSS occupy two time domain symbols denoted 1 and 2, the two S-SSSs occupy two time domain symbols denoted 3 and 4, respectively, and the two PSBCHs occupy two time domain symbols denoted 5 and 6, respectively.

2. Two S-SSSs occupy two discontinuous time domain symbols, and two PSBCH also occupy two discontinuous time domain symbols

(1) Referring to FIG. 6, a first S-PSS and a second S-PSS occupy two time domain symbols denoted 1 and 2, two S-SSSs occupy two time domain symbols denoted 4 and 6, respectively, and two PSBCHs occupy two time domain symbols denoted 3 and 5, respectively.

(2) Referring to FIG. 7, a first S-PSS and a second S-PSS occupy two time domain symbols denoted 1 and 2, two S-SSSs occupy two time domain symbols denoted 3 and 5, respectively, and two PSBCHs occupy two time domain symbols denoted 4 and 6, respectively.

3. Two S-SSS occupy two continuous time domain symbols, and two PSBCH occupy two discontinuous time domain symbols

Referring to FIG. 8, a first S-PSS and a second S-PSS occupy two time domain symbols denoted 1 and 2, two S-SSSs occupy two time domain symbols denoted 4 and 5, respectively, and two PSBCHs occupy two time domain symbols denoted 3 and 6, respectively.

Here, it should be noted that, in the above cases, the S-SSB does not include DMRS. Therefore, in these several cases, the receiving device can demodulate the PSBCH with the S-SSS.

Example two

On the basis of the first example, the S-SSB further includes: demodulating a reference signal (DMRS); wherein the DMRS is frequency division multiplexed with the at least one PSBCH signal.

Referring to FIG. 9, the first S-PSS and the second S-PSS occupy two time domain symbols denoted by 1 and 2, the two S-SSSs occupy two time domain symbols denoted by 5 and 6, respectively, the two PSBCHs are located in the time domain symbols denoted by 3 and 4, and the DMRS is embedded in the PSBCH signals, that is, the PSBCH signals and the DMRS adopt frequency division multiplexing.

The waveform scheduled for the receiving device at the vehicle-mounted device is a Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) waveform, and the structure of the S-SSB may be as follows:

the structure of the S-SSB may be in several cases in the first example, which is not described herein again. Of course, in this case, besides the above cases, the structure of the S-SSB further includes, in addition to the first example: at least one DMRS, one of which occupies one time domain symbol.

Referring to FIG. 10, a first S-PSS and a second S-PSS occupy two time domain symbols denoted 1 and 2, two S-SSSs occupy time domain symbols denoted 7 and 8, two PSBCHs occupy time domain symbols denoted 3 and 5, respectively, and two DMRSs occupy time domain symbols denoted 4 and 6, respectively.

Here, when the S-SSB includes two S-SSSs, the sequences used for the two S-SSSs may be the same or different. When the sequences used for the two S-SSSs are different, the sequences of the two S-SSSs can be different golden sequences, different m-sequences, or one golden sequence and one m-sequence.

Similarly, when the S-SSB includes two PSBCH, the sequences used by the two PSBCH may be the same or different. When the sequences used by the two PBSCH are not the same, the sequences of the two PBSCH can be different golden sequences, different m-sequences, or one golden sequence and one m-sequence.

And the sequence of the DMRS may be a golden sequence, and a generator polynomial of two m-sequences of the sequence for generating the DMRS may be the same as a generator polynomial of two m-sequences of the sequence for generating the S-SSS.

S302: the first device sends the S-SSB and, correspondingly, the second device receives the S-SSB.

Here, continuing with the above example, the first device is an in-vehicle device, and the second device is a receiving device.

In the embodiment of the application, the vehicle-mounted device can send the S-SSB to the receiving device in a beam scanning mode. In a specific implementation process, the vehicle-mounted device may detect a channel at a current transmission time, and transmit the S-SSB to the receiving device in a beam scanning manner when detecting that the channel at the current transmission time is idle. And when detecting that the channel is not idle at the current transmission moment, abandoning to transmit the S-SSB.

In the embodiment of the application, the purpose of sending the S-SSB to the receiving equipment by the vehicle-mounted equipment is to resist the Doppler spectrum effect generated between the vehicle-mounted equipment and the receiving equipment so as to improve the success rate of detecting the S-PSS sequence by the receiving equipment. In order to further improve the success rate of detecting S-PSS sequences by the receiving equipment. In the embodiment of the present application, the vehicle-mounted device sends at least two S-SSBs to the receiving device in one timeslot in a beam scanning manner, specifically please refer to fig. 11. Here, it should be noted that fig. 11 is only an example of the case in (1) of example one 1, and the embodiment of the present application is not limited to this.

In a specific implementation process, the vehicle-mounted device may determine, according to current speed information of the vehicle-mounted device, for example, a current speed of a vehicle in which the vehicle-mounted device is located, or a relative speed between the vehicle-mounted device and the receiving device, a doppler shift amount between the vehicle-mounted device and the receiving device, and further determine whether at least two S-SSBs need to be sent to the receiving device in a time slot.

S304: the second device synchronizes with the first device according to the first S-PSS and/or the second S-PSS.

In the embodiment of the application, the receiving equipment demodulates the received S-SSB to obtain a first S-PSS and/or a second S-PSS, and synchronizes with the vehicle-mounted equipment based on the obtained first S-PSS and/or second S-PSS.

The following describes the apparatus provided by the embodiments of the present application with reference to the drawings.

Referring to fig. 12, based on the same inventive concept, an embodiment of the present application provides a first apparatus 1200, where in an implementation manner of the first apparatus 1200, the first apparatus includes: a processor 1201, a transmitter 1202 and a memory 1203, the transmitter 1202 and the memory 1203 being coupled to the processor 1201. The processor 1201 may be a Central Processing Unit (CPU), an application-specific integrated circuit (ASIC), one or more integrated circuits for controlling program execution, a baseband chip, or the like. The memory 1203 may be one or more in number, and the memory 1203 may be a read-only memory (ROM), a Random Access Memory (RAM), or a disk memory, etc.

By programming the processor 1201, the code corresponding to the foregoing method for sending the synchronized broadcast information may be solidified into the chip, so that the chip can perform the following steps when running:

a transmitter 1202 for transmitting the S-SSB under control of the processor 1201.

In one possible design of the system,

the first m-sequence is an m-sequence of length 255; and/or

The second m-sequence is an m-sequence of length 255.

In one possible design, the S-SSB further includes:

In one possible design, the S-SSB occupies 6 time domain symbols in total.

In one possible design of the system,

demodulating a reference signal (DMRS);

In one possible design, when the transmitter 1202 transmits the S-SSB, it is specifically configured to:

transmitting at least two of the S-SSBs in one slot.

Referring to fig. 13, the present application provides a second apparatus 1300, where an embodiment of the second apparatus 1300 includes a processor 1301, a receiver 1302, and a memory 1303, and the receiver 1302 and the memory 1303 are coupled to the processor 1301. The processor 1301 may be a Central Processing Unit (CPU), an application-specific integrated circuit (ASIC), one or more integrated circuits for controlling program execution, a baseband chip, or the like. The number of memories may be one or more, and the memories may be read-only memories (ROMs), Random Access Memories (RAMs), or disk memories, etc.

The processor 1301 is programmed to solidify a code corresponding to the foregoing method for receiving the synchronized broadcast information into a chip, so that the chip can perform the following steps when running:

the control receiver 1302 receives a direct link-synchronization signal and a physical broadcast channel block S-SSB transmitted by the first device; wherein the S-SSB at least comprises a first direct link-primary synchronization signal S-PSS and a second S-PSS, and the sequence used by the first S-PSS is different from the sequence used by the second S-PSS;

In one possible design of the system,

In one of the possible designs of the device,

the first m-sequence is an m-sequence of length 255; and/or

The second m-sequence is an m-sequence of length 255.

In one possible design, the S-SSB further includes:

In one possible design of the system,

the at least one S-SSS is used to demodulate the at least one PSBCH signal.

In one possible design, the S-SSB occupies 6 time domain symbols in total.

In one possible design of the system,

demodulating a reference signal (DMRS);

In one possible design, when the receiver 1302 receives the direct link-synchronization signal and the physical broadcast channel block S-SSB sent by the first device, specifically, the receiver is configured to:

receiving at least two of the S-SSBs in a slot.

Referring to fig. 14, the present application provides a first device 1400, comprising:

a generation unit 1401 for generating a through link-synchronization signal and a physical broadcast channel block S-SSB; wherein the S-SSB at least comprises a first direct link-primary synchronization signal S-PSS and a second S-PSS, and the sequence used by the first S-PSS is different from the sequence used by the second S-PSS;

a sending unit 1402, configured to send the S-SSB.

In one possible design of the system,

the first m-sequence is an m-sequence of length 255; and/or

The second m-sequence is an m-sequence of length 255.

In one possible design, the S-SSB further includes:

In one possible design, the S-SSB occupies 6 time domain symbols in total.

In one possible design of the system,

demodulating a reference signal (DMRS);

In one possible design, when the sending unit 1402 sends the S-SSB, it is specifically configured to:

transmitting at least two of the S-SSBs in one slot.

Referring to fig. 15, the present application provides a second apparatus 1500, comprising:

a receiving unit 1501, configured to receive a direct link-synchronization signal and a physical broadcast channel block S-SSB sent by a first device; wherein the S-SSB at least comprises a first direct link-primary synchronization signal S-PSS and a second S-PSS, and the sequence used by the first S-PSS is different from the sequence used by the second S-PSS;

a synchronization unit 1502 configured to synchronize with the first device according to the first S-PSS and/or the second S-PSS.

In one possible design of the system,

the first m-sequence is an m-sequence of length 255; and/or

The second m-sequence is an m-sequence of length 255.

In one possible design, the S-SSB further includes:

In one possible design, the S-SSB occupies 6 time domain symbols in total.

In one of the possible designs of the device,

demodulating a reference signal (DMRS);

In one possible design, when the receiving unit 1501 receives the direct link-synchronization signal and the physical broadcast channel block S-SSB sent by the first device, specifically, the receiving unit is configured to:

receiving at least two of the S-SSBs in a slot.

The present application further provides a computer storage medium, which may include a memory, where the memory stores a program, and the program includes all the steps executed by the first device and the second device as described in the method embodiment shown in fig. 3 when executed.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The above embodiments are only used to describe the technical solutions of the present application in detail, but the above embodiments are only used to help understanding the method of the embodiments of the present invention, and should not be construed as limiting the embodiments of the present invention. Variations or substitutions that may be readily apparent to one skilled in the art are intended to be included within the scope of the embodiments of the present invention.

Claims

1. A method for transmitting synchronized broadcast information, comprising:

the first device generates a through link-synchronization signal and a physical broadcast channel block S-SSB; the S-SSB at least comprises a first direct link-primary synchronization signal S-PSS and a second S-PSS, the sequence used by the first S-PSS is different from the sequence used by the second S-PSS, the sequence of the first S-PSS is a first m sequence, the sequence of the second S-PSS is a second m sequence, the generating polynomial of the first m sequence is different from the generating polynomial of the second m sequence, and/or the cyclic shift value of the first m sequence is different from the cyclic shift value of the second m sequence;

the first device transmits at least two of the S-SSBs in one slot.

2. The method of claim 1,

the first m-sequence is an m-sequence of length 255; and/or

The second m-sequence is an m-sequence of length 255.

3. The method according to claim 1 or 2, wherein the S-SSB further comprises:

4. The method of claim 3, wherein the at least one S-SSS is used for demodulating the at least one PSBCH signal.

5. The method of claim 3, wherein the S-SSB occupies 6 time domain symbols in total.

6. The method of claim 5,

7. The method of claim 3, wherein when the waveform scheduled by the first device for the second device is an orthogonal frequency division multiplexing (CP) -OFDM waveform with cyclic prefix, the S-SSB further comprises:

demodulating a reference signal (DMRS);

8. The method of claim 3, wherein when the waveform scheduled by the first device for the second device is a discrete fourier transform spread orthogonal frequency division multiplexing, DFT-S-OFDM, waveform, the S-SSB further comprises:

9. A method for receiving synchronized broadcast information, comprising:

the second equipment receives at least two through link-synchronous signals and a physical broadcast channel block S-SSB sent by the first equipment in a time slot; the S-SSB at least comprises a first direct link-primary synchronization signal S-PSS and a second S-PSS, the sequence used by the first S-PSS is different from the sequence used by the second S-PSS, the sequence of the first S-PSS is a first m sequence, the sequence of the second S-PSS is a second m sequence, the generating polynomial of the first m sequence is different from the generating polynomial of the second m sequence, and/or the cyclic shift value of the first m sequence is different from the cyclic shift value of the second m sequence;

the second device synchronizes with the first device according to the first S-PSS and/or the second S-PSS.

10. The method of claim 9,

the first m-sequence is an m-sequence of length 255; and/or

The second m-sequence is an m-sequence of length 255.

11. The method according to claim 9 or 10, wherein the S-SSB further comprises:

12. The method of claim 11, wherein the at least one S-SSS is used for demodulating the at least one PSBCH signal.

13. The method of claim 11, wherein the S-SSB occupies a total of 6 time domain symbols.

14. The method of claim 13,

15. The method of claim 11, wherein when the waveform scheduled by the first device for the second device is an orthogonal frequency division multiplexing (CP) -OFDM waveform with cyclic prefix, further comprising:

demodulating a reference signal (DMRS);

16. The method of claim 11, wherein when the waveform scheduled by the first device for the second device is an orthogonal frequency division multiplexing, DFT-S-OFDM, waveform spread by discrete fourier transform, the S-SSB further comprises:

17. A first device, comprising:

a memory to store instructions;

generating a through link-synchronization signal and physical broadcast channel block S-SSB; wherein the S-SSB at least comprises a first direct link-primary synchronization signal S-PSS and a second S-PSS, and the sequence used by the first S-PSS is different from the sequence used by the second S-PSS, the sequence of the first S-PSS is a first m-sequence, the sequence of the second S-PSS is a second m-sequence, wherein the generator polynomial of the first m-sequence is different from the generator polynomial of the second m-sequence, and/or the cyclic shift value of the first m-sequence is different from the cyclic shift value of the second m-sequence;

a transmitter for transmitting at least two of the S-SSBs in one slot.

18. The apparatus of claim 17,

the first m-sequence is an m-sequence of length 255; and/or

The second m-sequence is an m-sequence of length 255.

19. The apparatus according to claim 17 or 18, wherein the S-SSB further comprises:

20. The apparatus of claim 19, wherein the at least one S-SSS is configured to demodulate the at least one PSBCH signal.

21. The apparatus of claim 19, wherein the S-SSB occupies a total of 6 time domain symbols.

22. The apparatus of claim 21,

23. The apparatus of claim 19, wherein when the waveform scheduled by the first apparatus for the second apparatus is an orthogonal frequency division multiplexing CP-OFDM waveform with cyclic prefix, further comprising in the S-SSB:

demodulating a reference signal (DMRS);

24. The apparatus of claim 19, wherein when the waveform scheduled by the first apparatus for the second apparatus is an orthogonal frequency division multiplexing, DFT-S-OFDM, waveform spread by discrete fourier transform, the S-SSB further comprises:

at least one DMRS, one of which occupies one time domain symbol.

25. A second apparatus, comprising:

a receiver for receiving at least two through link-synchronization signals and a physical broadcast channel block, S-SSB, transmitted by a first device in one time slot; the S-SSB at least comprises a first direct link-primary synchronization signal S-PSS and a second S-PSS, the sequence used by the first S-PSS is different from the sequence used by the second S-PSS, the sequence of the first S-PSS is a first m sequence, the sequence of the second S-PSS is a second m sequence, the generating polynomial of the first m sequence is different from the generating polynomial of the second m sequence, and/or the cyclic shift value of the first m sequence is different from the cyclic shift value of the second m sequence;

a memory to store instructions;

26. The apparatus of claim 25,

the first m-sequence is an m-sequence of length 255; and/or

The second m-sequence is an m-sequence of length 255.

27. The apparatus according to claim 25 or 26, wherein the S-SSB further comprises:

28. The apparatus of claim 27, wherein the at least one S-SSS is configured to demodulate the at least one PSBCH signal.

29. The apparatus of claim 27, wherein the S-SSB occupies a total of 6 time domain symbols.

30. The apparatus of claim 29,

31. The apparatus of claim 27, wherein when the waveform scheduled by the first apparatus for the second apparatus is a cyclic-prefixed orthogonal frequency division multiplexing (CP-OFDM) waveform, the S-SSB further comprises:

demodulating a reference signal (DMRS);

32. The apparatus of claim 27, wherein when the waveform scheduled by the first apparatus for the second apparatus is a discrete fourier transform spread orthogonal frequency division multiplexing, DFT-S-OFDM, waveform, the S-SSB further comprises:

at least one DMRS, one of which occupies one time domain symbol.

33. A first device, comprising:

a generating unit for generating a through link-synchronization signal and a physical broadcast channel block S-SSB; wherein the S-SSB at least comprises a first direct link-primary synchronization signal S-PSS and a second S-PSS, and the sequence used by the first S-PSS is different from the sequence used by the second S-PSS, the sequence of the first S-PSS is a first m-sequence, the sequence of the second S-PSS is a second m-sequence, wherein the generator polynomial of the first m-sequence is different from the generator polynomial of the second m-sequence, and/or the cyclic shift value of the first m-sequence is different from the cyclic shift value of the second m-sequence;

a sending unit, configured to send at least two S-SSBs in one timeslot.

34. A second apparatus, comprising:

a receiving unit, configured to receive at least two direct link-synchronization signals and a physical broadcast channel block S-SSB sent by a first device in a timeslot; wherein the S-SSB at least comprises a first direct link-primary synchronization signal S-PSS and a second S-PSS, and the sequence used by the first S-PSS is different from the sequence used by the second S-PSS, the sequence of the first S-PSS is a first m-sequence, the sequence of the second S-PSS is a second m-sequence, wherein the generator polynomial of the first m-sequence is different from the generator polynomial of the second m-sequence, and/or the cyclic shift value of the first m-sequence is different from the cyclic shift value of the second m-sequence;

35. A computer storage medium having stored therein instructions that, when executed on a computer, cause the computer to perform the method of any one of claims 1-8 or 9-16.