# US 12,192,921 B2 · Synchronization signal transmission method and terminal

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- Number: US 12,192,921 B2
- Document ID: US12192921B2
- Status: Granted
- Kind: B2
- Application number: 17/160,248
- Filed: 2021-01-27
- Published: 2021-05-20
- Granted: 2025-01-07
- Earliest claimed: 2018-07-27
- Assignees: Vivo Mobile Communication Co., Ltd.
- Applicants: Vivo Mobile Communication Co., Ltd.
- Inventors: Siqi Liu; Zichao Ji; Kai Wu
- Web page: https://patentgrep.com/patent/US12192921B2

## CPC

- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04W 56/001: {Synchronization between nodes}
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04L 5/0094: {Indication of how sub-channels of the path are allocated}
- H04W 56/0015: {one node acting as a reference for the others}
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A synchronization signal transmission method and a terminal are provided. The synchronization signal transmission method, applied to a terminal, includes: transmitting or receiving a sidelink synchronization signal block, where the sidelink synchronization signal block includes: a primary sidelink synchronization signal PSSS and a secondary sidelink synchronization signal SSSS, the PSSS and the SSSS being distributed in orthogonal frequency division multiplexing OFDM symbols occupied by the sidelink synchronization signal block.

## Claims

### Claim 1

A synchronization signal transmission method, applied to a terminal side, comprising:
transmitting or receiving a sidelink synchronization signal block,
wherein the sidelink synchronization signal block comprises: a primary sidelink synchronization signal PSSS and a secondary sidelink synchronization signal SSSS, the PSSS and the SSSS being distributed in orthogonal frequency division multiplexing OFDM symbols occupied by the sidelink synchronization signal block according to a preset rule, wherein the preset rule comprises at least one of the following:
one of the PSSS and the SSSS is located in the third symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the fifth symbol of the sidelink synchronization signal block;
one of the PSSS and the SSSS is located in the second symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the fifth symbol of the sidelink synchronization signal block;
one of the PSSS and the SSSS is located in the second symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the sixth symbol of the sidelink synchronization signal block;
one of the PSSS and the SSSS is located in the third symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the sixth symbol of the sidelink synchronization signal block; or,
one of the PSSS and the SSSS is located in the fourth symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the sixth symbol of the sidelink synchronization signal block;
wherein when one slot comprises candidate time domain locations of at least two sidelink synchronization signal blocks, and the subcarrier spacing is a second spacing, and one slot comprises candidate time domain locations of two sidelink synchronization signal blocks, an OFDM symbol index corresponding to the first symbol of candidate time domain locations of each of the two sidelink synchronization signal blocks is x+14n or y+14n,
wherein 0≤n<m; m is a maximum number of slots occupied by a sidelink synchronization signal block; and n=0 corresponds to the first OFDM symbol of the first slot comprising candidate time domain locations of a sidelink synchronization signal block, a value of x is set to 0, and a value of y is set to 6 or 7;
wherein when one slot comprises candidate time domain locations of a sidelink synchronization signal block, the preset rule comprises at least one of the following:
one of the PSSS and the SSSS is located in the third and fourth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the eleventh and twelfth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the second and third OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the twelfth and thirteenth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the fifth and seventh OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the tenth and twelfth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the third and sixth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the ninth and twelfth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the second and ninth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the fifth and twelfth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the second and ninth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the sixth and thirteenth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the third and tenth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the sixth and thirteenth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the fourth and eleventh OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the sixth and thirteenth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the third and ninth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the sixth and twelfth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the fourth and tenth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the sixth and twelfth OFDM symbols of one slot; or,
one of the PSSS and the SSSS is located in the third and tenth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the fifth and twelfth OFDM symbols of one slot.

### Claim 2 (depends on 1)

The synchronization signal transmission method according to claim 1, wherein when one slot comprises candidate time domain locations of two sidelink synchronization signal blocks, an OFDM symbol index corresponding to the first symbol of candidate time domain locations of each of the two sidelink synchronization signal blocks is 14n or 7+14n,
wherein 0≤n<m; m is a maximum number of slots occupied by sidelink synchronization signal block; and n=0 corresponds to the first OFDM symbol of the first slot comprising candidate time domain locations of a sidelink synchronization signal block.

### Claim 3 (depends on 1)

The synchronization signal transmission method according to claim 1, wherein when the number of OFDM symbols occupied by a sidelink synchronization signal block is greater than or equal to 5, the preset rule is:
one of the PSSS and the SSSS is located in the second symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the fifth symbol of the sidelink synchronization signal block.

### Claim 4 (depends on 1)

The synchronization signal transmission method according to claim 1, wherein when the number of OFDM symbols occupied by a sidelink synchronization signal block is greater than or equal to 6, the preset rule is at least one of the following:
one of the PSSS and the SSSS is located in the second symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the sixth symbol of the sidelink synchronization signal block;
one of the PSSS and the SSSS is located in the third symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the sixth symbol of the sidelink synchronization signal block; or,
one of the PSSS and the SSSS is located in the fourth symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the sixth symbol of the sidelink synchronization signal block.

### Claim 5 (depends on 1)

The synchronization signal transmission method according to claim 1, wherein when the subcarrier spacing is a first spacing, and one slot comprises candidate time domain locations of two sidelink synchronization signal blocks, an OFDM symbol index corresponding to the first symbol of candidate time domain locations of each of the two sidelink synchronization signal blocks is 14n or 7+14n,
wherein 0≤n<m; m is a maximum number of slots occupied by sidelink synchronization signal block; and n=0 corresponds to the first OFDM symbol of the first slot comprising candidate time domain locations of a sidelink synchronization signal block.

### Claim 6 (depends on 1)

The synchronization signal transmission method according to claim 1, wherein when the subcarrier spacing is a first spacing, and a number of OFDM symbols occupied by a sidelink synchronization signal block is greater than or equal to 5, the preset rule is:
one of the PSSS and the SSSS is located in the second symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the fifth symbol of the sidelink synchronization signal block.

### Claim 7 (depends on 1)

The synchronization signal transmission method according to claim 1, wherein when the subcarrier spacing is a first spacing, and a number of OFDM symbols occupied by a sidelink synchronization signal block is greater than or equal to 6, the preset rule is at least one of the following:
one of the PSSS and the SSSS is located in the second symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the sixth symbol of the sidelink synchronization signal block;
one of the PSSS and the SSSS is located in the third symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the sixth symbol of the sidelink synchronization signal block; or,
one of the PSSS and the SSSS is located in the fourth symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the sixth symbol of the sidelink synchronization signal block.

### Claim 8 (depends on 1)

The synchronization signal transmission method according to claim 1, wherein when the subcarrier spacing is a second spacing, and a number of OFDM symbols occupied by a sidelink synchronization signal block is greater than or equal to 6, the preset rule is at least one of the following:
one of the PSSS and the SSSS is located in the third symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the sixth symbol of the sidelink synchronization signal block; or,
one of the PSSS and the SSSS is located in the fourth symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the sixth symbol of the sidelink synchronization signal block.

### Claim 9 (depends on 1)

The synchronization signal transmission method according to claim 1, wherein when the subcarrier spacing is 120 kHz, and a number of OFDM symbols occupied by a sidelink synchronization signal block is greater than or equal to 5, the preset rule comprises:
one of the PSSS and the SSSS is located in the third symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the fifth symbol of the sidelink synchronization signal block.

### Claim 10 (depends on 1)

The synchronization signal transmission method according to claim 1, when the preset rule is: one of the PSSS and the SSSS is located in the third and fourth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the eleventh and twelfth OFDM symbols of one slot; or
when one of the PSSS and the SSSS is located in the second and third OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the twelfth and thirteenth OFDM symbols of one slot, the sixth and ninth OFDM symbols of one slot is used for transmitting or receiving a demodulation reference signal.

### Claim 11 (depends on 1)

The synchronization signal transmission method according to claim 1, wherein when at least two candidate time domain locations of sidelink synchronization signal blocks are consecutive in time domain, and sidelink synchronization signal blocks have been transmitted or received on at least the candidate time domain locations of the sidelink synchronization signal blocks, transmission directions of the sidelink synchronization signal blocks on the candidate time domain locations of the at least two sidelink synchronization signal blocks are the same.

### Claim 12 (depends on 1)

The synchronization signal transmission method according to claim 1, wherein when the subcarrier spacing is a third spacing, the preset rule is at least one of the following:
one of the PSSS and the SSSS is located in the third and sixth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the ninth and twelfth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the second and ninth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the fifth and twelfth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the second and ninth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the sixth and thirteenth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the third and tenth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the sixth and thirteenth OFDM symbols of one slot; or,
one of the PSSS and the SSSS is located in the fourth and eleventh OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the sixth and thirteenth OFDM symbols of one slot.

### Claim 13 (depends on 1)

The synchronization signal transmission method according to claim 1, wherein when the subcarrier spacing is a fourth spacing, the preset rule is at least one of the following:
one of the PSSS and the SSSS is located in the third and fourth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the eleventh and twelfth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the third and ninth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the sixth and twelfth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the fourth and tenth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the sixth and twelfth OFDM symbols of one slot; or,
one of the PSSS and the SSSS is located in the third and tenth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the fifth and twelfth OFDM symbols of one slot.

### Claim 14

A terminal, comprising a memory, a processor, and a program stored in the memory and capable of running on the processor, wherein when the program is executed by the processor, steps of a synchronization signal transmission method are implemented, wherein the synchronization signal transmission method comprises:
transmitting or receiving a sidelink synchronization signal block,
wherein the sidelink synchronization signal block comprises: a primary sidelink synchronization signal PSSS and a secondary sidelink synchronization signal SSSS, the PSSS and the SSSS being distributed in orthogonal frequency division multiplexing OFDM symbols occupied by the sidelink synchronization signal block according to a preset rule, wherein the preset rule comprises at least one of the following:
one of the PSSS and the SSSS is located in the third symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the fifth symbol of the sidelink synchronization signal block;
one of the PSSS and the SSSS is located in the second symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the fifth symbol of the sidelink synchronization signal block;
one of the PSSS and the SSSS is located in the second symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the sixth symbol of the sidelink synchronization signal block;
one of the PSSS and the SSSS is located in the third symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the sixth symbol of the sidelink synchronization signal block; or,
one of the PSSS and the SSSS is located in the fourth symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the sixth symbol of the sidelink synchronization signal block;
wherein when one slot comprises candidate time domain locations of at least two sidelink synchronization signal blocks, and the subcarrier spacing is a second spacing, and one slot comprises candidate time domain locations of two sidelink synchronization signal blocks, an OFDM symbol index corresponding to the first symbol of candidate time domain locations of each of the two sidelink synchronization signal blocks is x+14n or y+14n,
wherein 0≤n<m; m is a maximum number of slots occupied by a sidelink synchronization signal block; and n=0 corresponds to the first OFDM symbol of the first slot comprising candidate time domain locations of a sidelink synchronization signal block, a value of x is set to 0, and a value of y is set to 6 or 7;
wherein when one slot comprises candidate time domain locations of a sidelink synchronization signal block, the preset rule comprises at least one of the following:
one of the PSSS and the SSSS is located in the third and fourth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the eleventh and twelfth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the second and third OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the twelfth and thirteenth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the fifth and seventh OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the tenth and twelfth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the third and sixth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the ninth and twelfth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the second and ninth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the fifth and twelfth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the second and ninth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the sixth and thirteenth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the third and tenth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the sixth and thirteenth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the fourth and eleventh OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the sixth and thirteenth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the third and ninth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the sixth and twelfth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the fourth and tenth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the sixth and twelfth OFDM symbols of one slot; or,
one of the PSSS and the SSSS is located in the third and tenth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the fifth and twelfth OFDM symbols of one slot.

### Claim 15

A non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores a program, and when the program is executed by a processor, steps of a synchronization signal transmission method are implemented, wherein the synchronization signal transmission method comprises:
transmitting or receiving a sidelink synchronization signal block,
wherein the sidelink synchronization signal block comprises: a primary sidelink synchronization signal PSSS and a secondary sidelink synchronization signal SSSS, the PSSS and the SSSS being distributed in orthogonal frequency division multiplexing OFDM symbols occupied by the sidelink synchronization signal block according to a preset rule, wherein the preset rule comprises at least one of the following:
one of the PSSS and the SSSS is located in the third symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the fifth symbol of the sidelink synchronization signal block;
one of the PSSS and the SSSS is located in the second symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the fifth symbol of the sidelink synchronization signal block;
one of the PSSS and the SSSS is located in the second symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the sixth symbol of the sidelink synchronization signal block;
one of the PSSS and the SSSS is located in the third symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the sixth symbol of the sidelink synchronization signal block; or,
one of the PSSS and the SSSS is located in the fourth symbol of a sidelink synchronization signal block, and the other of the PSSS and the SSSS is located in the sixth symbol of the sidelink synchronization signal block;
wherein when one slot comprises candidate time domain locations of at least two sidelink synchronization signal blocks, and the subcarrier spacing is a second spacing, and one slot comprises candidate time domain locations of two sidelink synchronization signal blocks, an OFDM symbol index corresponding to the first symbol of candidate time domain locations of each of the two sidelink synchronization signal blocks is x+14n or y+14n,
wherein 0≤n<m; m is a maximum number of slots occupied by a sidelink synchronization signal block; and n=0 corresponds to the first OFDM symbol of the first slot comprising candidate time domain locations of a sidelink synchronization signal block, a value of x is set to 0, and a value of y is set to 6 or 7;
wherein when one slot comprises candidate time domain locations of a sidelink synchronization signal block, the preset rule comprises at least one of the following:
one of the PSSS and the SSSS is located in the third and fourth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the eleventh and twelfth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the second and third OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the twelfth and thirteenth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the fifth and seventh OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the tenth and twelfth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the third and sixth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the ninth and twelfth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the second and ninth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the fifth and twelfth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the second and ninth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the sixth and thirteenth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the third and tenth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the sixth and thirteenth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the fourth and eleventh OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the sixth and thirteenth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the third and ninth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the sixth and twelfth OFDM symbols of one slot;
one of the PSSS and the SSSS is located in the fourth and tenth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the sixth and twelfth OFDM symbols of one slot; or,
one of the PSSS and the SSSS is located in the third and tenth OFDM symbols of one slot, and the other of the PSSS and the SSSS is located in the fifth and twelfth OFDM symbols of one slot.

### Claim 16 (depends on 15)

The terminal according to claim 15, wherein when one slot comprises candidate time domain locations of two sidelink synchronization signal blocks, an OFDM symbol index corresponding to the first symbol of candidate time domain locations of each of the two sidelink synchronization signal blocks is 14n or 7+14n,
wherein 0≤n<m; m is a maximum number of slots occupied by sidelink synchronization signal block; and n=0 corresponds to the first OFDM symbol of the first slot comprising candidate time domain locations of a sidelink synchronization signal block.