Demodulation reference signal transmission method and apparatus

Patent metadata

Field	Value
Publication number	US-11943726-B2
Application number	US-202117316335-A
Country	US
Kind code	B2
Filing date	May 10, 2021
Priority date	May 5, 2017
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

Abstract

A signal transmission method and an apparatus are disclosed. In an embodiment a signal transmission method includes generating a reference signal and sending the reference signal, wherein the reference signal is sent in a specific time-frequency resource, and the specific time-frequency resource is located on symbols corresponding to a synchronization signal block.

First claim

What is claimed is:

1. A method comprising:
mapping a demodulation reference signal (DMRS) to a plurality of resource elements (REs) comprised in a time-frequency resource, wherein the time-frequency resource includes symbols where a physical broadcast channel (PBCH) or a secondary synchronization signal (SSS) is mapped, and a frequency resource of REs on a symbol where the SSS and the DMRS are mapped comprises a first frequency area where subcarriers of the DMRS are located and a second frequency area where subcarriers of the SSS are located, the first frequency area being different from the second frequency area, and wherein the PBCH, the SSS and a primary synchronization signal (PSS) are comprised in a synchronization signal block.

2. The method according to claim 1 , wherein REs of the plurality of REs are adjacent in a time domain and not adjacent in a frequency domain in the time-frequency resource.

3. The method according to claim 1 , wherein a third frequency area of the time-frequency resource comprises subcarriers of the PBCH of the synchronization signal block.

4. The method according to claim 1 , further comprising:
generating the DMRS using a time-frequency resource unit as a unit, wherein the time-frequency resource unit includes symbols of the synchronization signal block.

5. The method according to claim 1 , wherein locations of the REs of the plurality of REs are related to a cell identifier (ID).

6. The method according to claim 1 , wherein before mapping the DMRS, the method further comprises:
generating the DMRS; and
after mapping the DMRS, the method further comprises:
sending the DMRS on the plurality of REs.

7. The method according to claim 1 , wherein the time-frequency resource excludes a symbol where the PSS is mapped.

8. An apparatus comprising:
one or more circuits in communication with a memory storage comprising instructions, wherein the instructions, when executed by the one or more circuits, cause the apparatus to:
map a demodulation reference signal (DMRS) to a plurality of resource elements (REs) comprised in a time-frequency resource, wherein the time-frequency resource includes symbols where a physical broadcast channel (PBCH) or a secondary synchronization signal (SSS) is mapped, and a frequency resource of REs on a symbol where the SSS and the DMRS are mapped comprises a first frequency area where subcarriers of the DMRS are located and a second frequency area where subcarriers of the SSS are located, the first frequency area being different from the second frequency area, and wherein the PBCH, the SSS and a primary synchronization signal (PSS) are comprised in a synchronization signal block.

9. The apparatus according to claim 8 , wherein REs of the plurality of REs are adjacent in a time domain and not adjacent in a frequency domain in the time-frequency resource.

10. The apparatus according to claim 8 , wherein a third frequency area of the time-frequency resource comprises subcarriers of the PBCH of the synchronization signal block.

11. The apparatus according to claim 8 , wherein the instructions, when executed by the one or more circuits, cause the apparatus further to:
generate the DMRS using a time-frequency resource unit as a unit, wherein the time-frequency resource unit includes symbols of the synchronization signal block.

12. The apparatus according to claim 8 , wherein locations of the REs of the plurality of REs are related to a cell identifier (ID).

13. The apparatus according to claim 8 , wherein the instructions, when executed by the one or more circuits, cause the apparatus further to:
generate the DMRS; and
send the DMRS on the plurality of REs.

14. The apparatus according to claim 8 , wherein the time-frequency resource excludes a symbol where the PSS is mapped.

15. A method comprising:
receiving a demodulation reference signal (DMRS) on a plurality of resource elements (REs) comprised in a time-frequency resource, wherein the time-frequency resource includes symbols where a physical broadcast channel (PBCH) or a secondary synchronization signal (SSS) is mapped, and a frequency resource of REs on a symbol where the SSS and the DMRS are mapped comprises a first frequency area where subcarriers of the DMRS are located and a second frequency area where subcarriers of the SSS are located, the first frequency area being different from the second frequency area, and wherein the PBCH, the SSS and a primary synchronization signal (PSS) are comprised in a synchronization signal block; and
using the DMRS for the PBCH.

16. The method according to claim 15 , wherein REs of the plurality of REs are adjacent in a time domain and not adjacent in a frequency domain in the time-frequency resource.

17. The method according to claim 15 , wherein a third frequency area of the time-frequency resource comprises subcarriers of the PBCH of the synchronization signal block.

18. The method according to claim 15 , wherein locations of REs of the plurality of REs are related to a cell identifier (ID).

19. The method according to claim 15 , wherein the time-frequency resource excludes a symbol where the PSS is mapped.

20. An apparatus comprising:
one or more circuits in communication with a memory storage comprising instructions, wherein the instructions, when executed by the one or more circuits, cause the apparatus to:
receive a demodulation reference signal (DMRS) on a plurality of resource elements (REs) comprised in a time-frequency resource, wherein the time-frequency resource includes symbols where a physical broadcast channel (PBCH) or a secondary synchronization signal (SSS) is mapped, and a frequency resource of REs on a symbol where the SSS and the DMRS are mapped comprises a first frequency area where subcarriers of the DMRS are located and a second frequency area where subcarriers of the SSS are located, the first frequency area being different from the second frequency area, and wherein the PBCH, the SSS and a primary synchronization signal (PSS) are comprised in a synchronization signal block; and
use the DMRS for the PBCH.

21. The apparatus according to claim 20 , wherein REs of the plurality of REs are adjacent in a time domain and not adjacent in a frequency domain in the time-frequency resource.

22. The apparatus according to claim 20 , wherein a third frequency area of the time-frequency resource comprises subcarriers of the PBCH of the synchronization signal block.

23. The apparatus according to claim 20 , wherein locations of REs of the plurality of REs are related to a cell identifier (ID).

24. The apparatus according to claim 20 , wherein the time-frequency resource excludes a symbol where the PSS is mapped.

Assignees

• Huawei Tech Co Ltd

Inventors

• Liu Jin
• Yuan Pu
• Luo Jun
• Xiang Zhengzheng
• Rong Lu

Classifications

• H04L27/2655

  Synchronisation arrangements · CPC title

• H04L5/0008 Primary

  Wavelet-division · CPC title

• H04W56/001 Primary

  Synchronization between nodes · CPC title

• H04L5/00

  Arrangements affording multiple use of the transmission path · CPC title

• H04L5/0007

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title