Reference signal transmitting and receiving method, base station, terminal, storage medium, and system

Patent metadata

Field	Value
Publication number	US-12101266-B2
Application number	US-201916321645-A
Country	US
Kind code	B2
Filing date	Jan 21, 2019
Priority date	Feb 13, 2018
Publication date	Sep 24, 2024
Grant date	Sep 24, 2024

Abstract

There is provided a method for transmitting a reference signal. The method for transmitting the reference signal includes: determining locations in time and frequency domains of a DRS, the DRS comprising at least one of a PSS, an SSS, a PBCH, a DMRS for PBCH, a CSI-RS for TRS, a CSI-RS for beam management, and a CSI-RS for acquiring channel state information; and transmitting the DRS at the determined locations in time and frequency domains of the DRS.

First claim

What is claimed is:

1. A method for transmitting a reference signal by a base station, comprising:
determining locations in time and frequency domains of a Discovery Reference Signal (DRS), the DRS comprising a Physical Broadcast Channel (PBCH) and a Demodulation Reference Signal (DMRS) for PBCH, or the DRS comprising the PBCH, the DMRS for PBCH and at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), a Channel State Information Reference Signal (CSI-RS) for Tracking Reference Signal (TRS), a CSI-RS for beam management, and a CSI-RS for acquiring channel state information; and
transmitting the DRS at the determined locations in time and frequency domains of the DRS,
wherein the PBCH and the DMRS for PBCH are provided in the un-occupied zones in the symbols where the PSS and the SSS are located,
wherein the PSS is located in fourth, eighth, sixteenth, and twentieth symbols in every two time slots of a Synchronization Signal burst (SS burst),
wherein the SSS is located in sixth, tenth, eighteenth, and twenty-second symbols in every two time slots of a Synchronization Signal burst (SS burst).

2. The method according to claim 1 , wherein at least one the CSI-RS is present in each time slot corresponding to a Synchronization Signal block (SSB), and the SSB includes the PSS, the SSS, the PBCH and the DMRS for PBCH of adjacent symbols.

3. The method according to claim 2 , wherein the CSI-RS for TRS is located in at least one of a zeroth symbol and a second symbol in each time slot of a Synchronization Signal burst (SS burst).

4. The method according to claim 2 , wherein the PBCH and the DMRS for PBCH are located in the fifth, seventh, ninth, eleventh, seventeenth, nineteenth, twenty-first, and twenty-third symbols in every two time slots of a Synchronization Signal burst (SS burst).

5. The method according to claim 2 , wherein the PBCH and the DMRS for PBCH are located in fourth to eleventh symbols and sixteenth to twenty-third symbols in every two time slots of a Synchronization Signal burst (SS burst).

6. The method according to claim 2 , wherein the CSI-RS for beam management or the CSI-RS for acquiring channel state information is located in at least one symbol in each time slot of a Synchronization Signal burst (SS burst).

7. The method according to claim 2 , wherein the CSI-RS has a frequency domain density of 1 and a location in frequency domain starting from a subcarrier 0 or a subcarrier N, wherein N is a natural number, and 0≤N≤11.

8. The method according to claim 2 , wherein the CSI-RS has a frequency domain density of ½ and a location in frequency domain starting from a subcarrier 0 or a subcarrier N, wherein Nis a natural number, and 0≤N≤23.

9. The method according to claim 2 , comprising:
indicating a location in time domain of the SSB by high-layer signaling; and
indicating a location in frequency domain of the SSB by the high-layer signaling.

10. The method according to claim 2 , wherein the CSI-RS has a frequency domain density of 3 and a location in frequency domain starting from a subcarrier 0 or a subcarrier N, wherein N is a natural number, and 0≤N≤11.

11. The method according to claim 10 , further comprising:
indicating a value of N by high-layer signaling.

12. The method according to claim 11 , the location in frequency domain includes a center frequency corresponding to the SSB.

13. The method according to claim 12 , wherein the high-layer signaling includes offset information of the center frequency corresponding to the SSB from a common Physical Resource Block (PRB) index 0.

14. A base station, comprising a memory and a processor, the memory storing computer instructions causing the processor to:
determine locations in time and frequency domains of a Discovery Reference Signal (DRS), the DRS comprising a Physical Broadcast Channel (PBCH) and a Demodulation Reference Signal (DMRS) for PBCH, or the DRS comprising the PBCH, the DMRS for PBCH and at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), a Channel State Information Reference Signal (CSI-RS) for Tracking Reference Signal (TRS), a CSI-RS for beam management, and a CSI-RS for acquiring channel state information; and
transmit the DRS at the determined locations in time and frequency domains of the DRS,
wherein the PBCH and the DMRS for PBCH are provided in the un-occupied zones in the symbols where the PSS and the SSS are located,
wherein the PSS is located in fourth, eighth, sixteenth, and twentieth symbols in every two time slots of a Synchronization Signal burst (SS burst),
wherein the SSS is located in sixth, tenth, eighteenth, and twenty-second symbols in every two time slots of a Synchronization Signal burst (SS burst).

15. The base station according to claim 14 , wherein at least one the CSI-RS is present in each time slot corresponding to a Synchronization Signal block (SSB), and the SSB includes the PSS, the SSS, the PBCH and the DMRS for PBCH of adjacent symbols.

16. The base station according to claim 15 , wherein the CSI-RS for TRS is located in at least one of a zeroth symbol and a second symbol in each time slot of a Synchronization Signal burst (SS burst).

17. The base station according to claim 15 , wherein the CSI-RS for beam management or the CSI-RS for acquiring channel state information is located in at least one symbol in each time slot of a Synchronization Signal burst (SS burst).

18. A non-transitory storage medium storing computer instructions, wherein the computer instructions cause a processor to:
determine locations in time and frequency domains of a Discovery Reference Signal (DRS), the DRS comprising a Physical Broadcast Channel (PBCH) and a Demodulation Reference Signal (DMRS) for PBCH, or the DRS comprising the PBCH, the DMRS for PBCH and at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), a Channel State Information Reference Signal (CSI-RS) for Tracking Reference Signal (TRS), a CSI-RS for beam management, and a CSI-RS for acquiring channel state information; and
transmit the DRS at the determined locations in time and frequency domains of the DRS,
wherein the PBCH and the DMRS for PBCH are provided in the un-occupied zones in the symbols where the PSS and the SSS are located,
wherein the PSS is located in fourth, eighth, sixteenth, and twentieth symbols in every two time slots of a Synchronization Signal burst (SS burst),
wherein the SSS is located in sixth, tenth, eighteenth, and twenty-second symbols in every two time slots of a Synchronization Signal burst (SS burst).

Assignees

• Spreadtrum Comm Shanghai Co

Inventors

• Wang Hualei
• Shen Xingya

Classifications

• H04W72/12

  Wireless traffic scheduling · CPC title

• H04W16/14

  Spectrum sharing arrangements {between different networks} · CPC title

• H04L5/0078

  Timing of allocation · CPC title

• H04L5/0007

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

• H04L5/005

  of common pilots, i.e. pilots destined for multiple users or terminals · CPC title