Demodulation reference signal transmission method and apparatus

Patent metadata

Field	Value
Publication number	US-11006377-B2
Application number	US-201816141099-A
Country	US
Kind code	B2
Filing date	Sep 25, 2018
Priority date	May 5, 2017
Publication date	May 11, 2021
Grant date	May 11, 2021

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:
generating a demodulation reference signal; and
sending the demodulation reference signal, wherein the demodulation reference signal is sent in a specific time-frequency resource, wherein the specific time-frequency resource is located on symbols where a physical broadcast channel (PBCH) and a secondary synchronization signal (SSS) are mapped, the PBCH being comprised in a synchronization signal block, and wherein the synchronization signal block comprises a primary synchronization signal (PSS), the SSS and the PBCH; and
wherein resource elements (REs) for mapping the demodulation reference signal in a symbol where the SSS is mapped are located in a fourth frequency domain range, and the fourth frequency domain range is not overlapped with a third frequency domain range where the SSS is mapped.

2. The method according to claim 1 , wherein a plurality of resource elements (REs) mapped to the demodulation reference signal is adjacent in time domain and not adjacent in frequency domain in the specific time-frequency resource.

3. The method according to claim 1 , wherein a quantity of REs mapped to the demodulation reference signal in a first frequency domain range of the specific time-frequency resource is greater than a quantity of REs mapped to the demodulation reference signal in a second frequency domain range of the specific time-frequency resource, wherein the primary synchronization signal and the secondary synchronization signal of the synchronization signal block are not sent on a subcarrier corresponding to the first frequency domain range, and wherein the secondary synchronization signal is sent on a subcarrier corresponding to the second frequency domain range.

4. The method according to claim 1 , wherein a quantity of REs mapped to the demodulation reference signal in a first frequency domain range of the specific time-frequency resource is greater than a quantity of REs mapped to the demodulation reference signal in a second frequency domain range of the specific time-frequency resource, wherein the primary synchronization signal or the secondary synchronization signal of the synchronization signal block are not sent on a subcarrier corresponding to the first frequency domain range, and wherein the secondary synchronization signal is sent on a subcarrier corresponding to the second frequency domain range.

5. The method according to claim 1 , wherein a frequency domain range of the specific time-frequency resource is a subcarrier corresponding to the PBCH of the synchronization signal block.

6. The method according to claim 1 , wherein generating the demodulation reference signal comprises generating the demodulation reference signal by using a time-frequency resource unit as a unit, wherein the time-frequency resource unit is located on symbols corresponding to the synchronization signal block.

7. A method comprising:
receiving a demodulation reference signal, wherein the demodulation reference signal is received in a specific time-frequency resource, and the specific time-frequency resource is located on symbols where a physical broadcast channel (PBCH) and a secondary synchronization signal (SSS) are mapped, the PBCH being comprised in a synchronization signal block, wherein the synchronization signal block comprises a primary synchronization signal (PSS), the SSS and the PBCH, and wherein resource elements (REs) for mapping the demodulation reference signal in a symbol where the SSS is mapped are located in a fourth frequency domain range, and the fourth frequency domain range is not overlapped 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 a plurality of resource elements (REs) mapped to the demodulation reference signal is adjacent in time domain and not adjacent in frequency domain in the specific time-frequency resource.

9. The method according to claim 7 , wherein a quantity of REs mapped to the demodulation reference signal in a first frequency domain range of the specific time-frequency resource is greater than a quantity of REs mapped to the demodulation reference signal in a second frequency domain range of the specific time-frequency resource, wherein the primary synchronization signal and the secondary synchronization signal of the synchronization signal block are not sent on a subcarrier corresponding to the first frequency domain range, and wherein the secondary synchronization signal is sent on a subcarrier corresponding to the second frequency domain range.

10. The method according to claim 7 , wherein a quantity of REs mapped to the demodulation reference signal in a first frequency domain range of the specific time-frequency resource is greater than a quantity of REs mapped to the demodulation reference signal in a second frequency domain range of the specific time-frequency resource, wherein the primary synchronization signal or the secondary synchronization signal of the synchronization signal block are not sent on a subcarrier corresponding to the first frequency domain range, and wherein the secondary synchronization signal is sent on a subcarrier corresponding to the second frequency domain range.

11. The method according to claim 7 , wherein a frequency domain range of the specific time-frequency resource is a subcarrier corresponding to the PBCH of the synchronization signal block.

12. An apparatus comprising:
a processor configured to generate a demodulation reference signal; and
a transceiver configured to send the demodulation reference signal,
wherein the demodulation reference signal is sent in a specific time-frequency resource, and the specific time-frequency resource and a secondary synchronization signal (SSS) are located on symbols where a physical broadcast channel (PBCH) is mapped, the PBCH being comprised in a synchronization signal block, and wherein the synchronization signal block comprises a primary synchronization signal (PSS), the SSS and the PBCH; and
wherein resource elements (REs) for mapping the demodulation reference signal in a symbol where the SSS is mapped are located in a fourth frequency domain range, and the fourth frequency domain range is not overlapped with a third frequency domain range where the SSS is mapped.

13. The apparatus according to claim 12 , wherein a plurality of REs mapped to the demodulation reference signal is adjacent in time domain and not adjacent in frequency domain in the specific time-frequency resource.

14. The apparatus according to claim 12 , wherein a quantity of REs mapped to the demodulation reference signal in a first frequency domain range of the specific time-frequency resource is greater than a quantity of REs mapped to the demodulation reference signal in a second frequency domain range of the specific time-frequency resource, wherein the primary synchronization signal and the secondary synchronization signal of the synchronization signal block are not sent on a subcarrier corresponding to the first frequency domain range, and wherein the secondary synchronization signal is sent on a subcarrier corresponding to the second frequency domain range.

15. The apparatus according to claim 12 , wherein a quantity of REs mapped to the demodulation reference signal in a first frequency domain range of the specific time-frequency resource is greater than a quantity of REs mapped to the demodulation reference signal in a second frequency domain range of the specific time-frequency resource, wherein the primary synchronization signal or the secondary synchron

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

• H04L5/00

  Arrangements affording multiple use of the transmission path · CPC title

• H04W56/001 Primary

  Synchronization between nodes · CPC title