Demodulation reference signal transmission method and apparatus

Patent metadata

Field	Value
Publication number	US-11012959-B2
Application number	US-202016943459-A
Country	US
Kind code	B2
Filing date	Jul 30, 2020
Priority date	May 5, 2017
Publication date	May 18, 2021
Grant date	May 18, 2021

Abstract

A signal transmission method and an apparatus are disclosed. In an embodiment a signal transmission method includes generating a demodulation reference signal and sending the demodulation reference signal, wherein the demodulation 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:
generating a demodulation reference signal comprising a reference signal sequence, wherein the reference signal sequence is generated based on a cell ID; and
sending the demodulation reference signal, wherein the demodulation reference signal is mapped to a plurality of resource elements (REs), and wherein the plurality of REs are located on a plurality of symbols to which a physical broadcast channel (PBCH) comprised in a synchronization signal block and a secondary synchronization signal (SSS) comprised in the synchronization signal block are mapped, the synchronization signal block comprising a primary synchronization signal (PSS), the SSS and the PBCH; and
wherein REs for mapping the demodulation reference signal in a symbol where the SSS is mapped are located in a fourth frequency domain range, with the fourth frequency domain range not overlapping with a third frequency domain range where the SSS is mapped.

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

3. The method according to claim 1 , wherein the plurality of REs are located on a plurality of subcarriers in a range of subcarriers corresponding to the PBCH.

4. The method according to claim 3 , wherein a RE of the plurality of REs located on a symbol of the plurality of symbols is located on a subcarrier in the range of subcarriers corresponding to the PBCH.

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

6. The method according to claim 1 , wherein the plurality of REs comprises a first set of REs located in a first time-frequency resource area and a second set of REs located in a second time-frequency resource area, and a quantity of the first set of REs is greater than a quantity of the second set of REs, wherein the first time-frequency resource area comprises subcarriers onto which the primary synchronization signal and the secondary synchronization signal are not mapped, and wherein the second time-frequency resource area comprises subcarriers onto which the secondary synchronization signal is mapped.

7. A signal transmission method comprising:
receiving a demodulation reference signal on a plurality of resource elements (REs), wherein the demodulation reference signal comprises a reference signal sequence related to a cell ID, wherein the plurality of REs are located on a plurality of symbols to which a physical broadcast channel (PBCH) comprised in a synchronization signal block and a secondary synchronization signal (SSS) comprised in the synchronization signal block are mapped, the synchronization signal block comprising a primary synchronization signal (PSS), the SSS and the PBCH, and wherein REs of the plurality of REs in a symbol where the SSS is mapped are located in a fourth frequency domain range, with the fourth frequency domain range not overlapping with a third frequency domain range where the SSS is mapped; and
performing a channel estimation based on the demodulation reference signal.

8. The method according to claim 7 , wherein the plurality of REs comprises REs that are adjacent in a time domain and not adjacent in a frequency domain.

9. The method according to claim 7 , wherein the plurality of REs are located on a plurality of subcarriers in a range of subcarriers corresponding to the PBCH.

10. The method according to claim 9 , wherein a RE of the plurality of REs located on a symbol of the plurality of symbols is located on a subcarrier in the range of subcarriers corresponding to the PBCH.

11. The method according to claim 7 , further comprising: determining locations of the plurality of REs according to the cell ID.

12. The method according to claim 7 , wherein the plurality of REs comprises a first set of REs located in a first time-frequency resource area and a second set of REs located in a second time-frequency resource area, and a quantity of the first set of REs is greater than a quantity of the second set of REs, wherein the first time-frequency resource area comprises subcarriers onto which the primary synchronization signal and the secondary synchronization signal are not mapped, and wherein the second time-frequency resource area comprises subcarriers onto which the secondary synchronization signal is mapped.

13. An apparatus comprising:
a non-transitory memory storage comprising instructions; and
one or more processors in communication with the memory storage, wherein the instructions, when executed by the one or more processors, cause the apparatus to:
generate a demodulation reference signal comprising a reference signal sequence, wherein the reference signal sequence is generated based on a cell ID; and
send the demodulation reference signal, wherein the demodulation reference signal is mapped to a plurality of resource elements (REs), wherein the plurality of REs are located on a plurality of symbols to which a physical broadcast channel (PBCH) comprised in a synchronization signal block and a secondary synchronization signal (SSS) comprised in the synchronization signal block are mapped, the synchronization signal block comprising a primary synchronization signal (PSS), the SSS and the PBCH; and
wherein REs for mapping the demodulation reference signal in a symbol where the SSS is mapped are located in a fourth frequency domain range, with the fourth frequency domain range not overlapping with a third frequency domain range where the SSS is mapped.

14. The apparatus according to claim 13 , wherein the plurality of REs comprises REs that are adjacent in a time domain and not adjacent in a frequency domain.

15. The apparatus according to claim 13 , wherein the plurality of REs are located on a plurality of subcarriers in a range of subcarriers corresponding to the PBCH.

16. The apparatus according to claim 15 , wherein a RE of the plurality of REs located on a symbol of the plurality of symbols is located on a subcarrier in the range of subcarriers corresponding to the PBCH.

17. The apparatus according to claim 13 , wherein locations of the plurality of REs are based on the cell ID.

18. The apparatus according to claim 13 , wherein the plurality of REs comprises a first set of REs located in a first time-frequency resource area and a second set of REs located in a second time-frequency resource area, and a quantity of the first set of REs is greater than a quantity of the second set of REs, wherein the first time-frequency resource area comprises subcarriers onto which the primary synchronization signal and the secondary synchronization signal are not mapped, and wherein the second time-frequency resource area comprises subcarriers onto which the secondary synchronization signal is mapped.

19. An apparatus comprising:
a non-transitory memory storage comprising instructions; and
one or more processors in communication with the memory storage, wherein the instructions, when executed by the one or more processors, cause the apparatus to:
receive a demodulation reference signal on a plurality of resource elements (REs), wherein the demodulation reference signal comprises a reference signal sequence related to a cell ID, wherein the plurality of REs are located on a plurality of symbols to which a physical broadcast channel (PBCH) comprised in a synchronization signal block and a secondary synchronization signal (SSS) comprised in the synchronization signal block are mapped, the synchronization signal block comprising a primary synchroni

Assignees

• Huawei Tech Co Ltd

Inventors

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

Classifications

• H04W72/30

  Resource management for broadcast services · CPC title

• H04L27/2655

  Synchronisation arrangements · CPC title

• H04L5/0008 Primary

  Wavelet-division · CPC title

• H04L27/26

  Systems using multi-frequency codes (H04L27/32 takes precedence) · CPC title

• H04L5/00

  Arrangements affording multiple use of the transmission path · CPC title