SYNCHRONIZATION FOR WIDEBAND COVERAGE ENHANCEMENT

• US 20180332551A1
• Filed: 12/27/2017
• Published: 11/15/2018
• Est. Priority Date: 05/10/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: LIU, Chih-Hao, YERRAMALLI, Srinivas, KADOUS, Tamer
• Granted Patent: US 10,484,954 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 56/0005 synchronizing of arrival of multiple uplinks
• CPC Class Codes: H04W 56/001 Synchronization between nodes
• CPC Class Codes: H04W 56/0025 synchronizing potentially movable access points

Abstract

Methods, systems, and devices for wireless communication are described for synchronization for wideband coverage enhancement. A user equipment (UE) may receive a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) in a subframe. In one example, the SSS may be received in a symbol that is after a symbol in which the PSS is received, and after a set of symbols in which a set of other synchronization signals is received. In another example, the PSS may be received in each of a first plurality of consecutive symbols, and the SSS may be received in each of a second plurality of consecutive symbols, wherein the second plurality of consecutive symbols is after the first plurality of consecutive symbols within the subframe. The UE may synchronize with a base station based at least in part on the PSS and the SSS. Numerous other aspects are provided.

Claims

1. A method for wireless communication, comprising:

receiving, by a user equipment (UE), a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) in subframe of a frame,

wherein the SSS is received in a symbol of the subframe that is after a symbol of the subframe in which the PSS is received, and after a set of symbols of the subframe in which a set of other synchronization signals is received; and

synchronizing, by the UE, with a base station based at least in part on the PSS and the SSS received in the subframe.

2. The method of claim 1, further comprising:

receiving the PSS and the SSS in another subframe of the frame,

wherein the SSS is received in a symbol of the other subframe that is before a symbol of the other subframe in which the PSS is received, and before a set of symbols of the other subframe in which the set of other synchronization signals is received,

wherein the other subframe is before the subframe, and

wherein the UE is configured to synchronize with the base station based at least in part on the PSS or the SSS received in the other subframe.

3. The method of claim 2, wherein:

within the subframe;

the symbols in which the PSS and the SSS are received are at a first particular location, and

the set of symbols in which the set of other synchronization signals is received is at a second particular location; and

within the other subframe;

the set of symbols in which the set of other synchronization signals is received is at the first particular location, and

the symbols in which the PSS and the SSS are received are at the second particular location.

4. The method of claim 3, wherein:

within the subframe;

another PSS, included in the set of other synchronization signals, is received in a symbol, at the second particular location, that is before a symbol in which another SSS, included in the set of other synchronization signals, is received; and

within the other subframe;

the other PSS, included in the set of other synchronization signals, is received in a symbol, at the first particular location, that is after a symbol in which the other SSS, included in the set of other synchronization signals, is received.

5. The method of claim 1, further comprising:

receiving the PSS and the SSS in another subframe of the frame,

wherein the SSS is received in a symbol of the other subframe that is after a symbol of the other subframe in which the PSS is received, and after a set of symbols of the other subframe in which the set of other synchronization signals is received,

wherein the other subframe is after the subframe, and

wherein the UE is configured to synchronize with the base station based at least in part on the PSS or the SSS received in the other subframe.

6. A method for wireless communication, comprising:

generating, by a base station, a secondary synchronization signal (SSS) based at least in part on a cell identifier group associated with the base station; and

transmitting, by the base station, the SSS and a primary synchronization signal (PSS) in a subframe of a frame,

wherein the SSS is transmitted in a symbol of the subframe that is after a symbol of the subframe in which the PSS is transmitted, and after a set of symbols of the subframe in which a set of other synchronization signals is transmitted.

7. The method of claim 6, further comprising:

transmitting the PSS and the SSS in another subframe of the frame,

wherein the SSS is transmitted in a symbol of the other subframe that is before a symbol of the other subframe in which the PSS is transmitted, and before a set of symbols of the other subframe in which the set of other synchronization signals is transmitted,

wherein the other subframe is before the subframe, and

wherein a user equipment is configured to synchronize with the base station based at least in part on the PSS or the SSS transmitted in the other subframe.

8. The method of claim 7, wherein:

within the subframe;

the symbols in which the PSS and the SSS are transmitted are at a first particular location, and

the set of symbols in which the set of other synchronization signals is transmitted is at a second particular location; and

within the other subframe;

the set of symbols in which the set of other synchronization signals is transmitted is at the first particular location, and

the symbols in which the PSS the SSS are transmitted are at the second particular location.

9. The method of claim 8, wherein:

within the subframe;

another PSS, included in the set of other synchronization signals, is transmitted in a symbol, at the second particular location, that is before a symbol in which another SSS, included in the set of other synchronization signals, is transmitted; and

within the other subframe;

the other PSS, included in the set of other synchronization signals, is transmitted in a symbol, at the first particular location, that is after a symbol in which the other SSS, included in the set of other synchronization signals, is transmitted.

10. The method of claim 6, further comprising:

transmitting the PSS and the SSS in another subframe of the frame,

wherein the SSS is transmitted in a symbol of the other subframe that is after a symbol of the other subframe in which the PSS is transmitted, and after a set of symbols of the other subframe in which the set of other synchronization signals is transmitted,

wherein the other subframe is after the subframe, and

wherein a user equipment is configured to synchronize with the base station based at least in part on the PSS or the SSS transmitted in the other subframe.

11. An apparatus for wireless communication, comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to;

receive a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) in subframe of a frame,

wherein the SSS is received in a symbol of the subframe that is after a symbol of the subframe in which the PSS is received, and after a set of symbols of the subframe in which a set of other synchronization signals is received; and

synchronize the apparatus with a base station based at least in part on the PSS and the SSS received in the subframe.

12. The apparatus of claim 11, wherein the instructions are further executable by the processor to:

receive the PSS and the SSS in another subframe of the frame,

wherein the SSS is received in a symbol of the other subframe that is before a symbol of the other subframe in which the PSS is received, and before a set of symbols of the other subframe in which the set of other synchronization signals is received,

wherein the other subframe is before the subframe, and

wherein the apparatus is configured to synchronize with the base station based at least in part on the PSS or the SSS received in the other subframe.

13. The apparatus of claim 12, wherein:

within the subframe;

the symbols in which the PSS and the SSS are received are at a first particular location, and

the set of symbols in which the set of other synchronization signals is received is at a second particular location; and

within the other subframe;

the set of symbols in which the set of other synchronization signals is received is at the first particular location, and

the symbols in which the PSS and the SSS are received are at the second particular location.

14. The apparatus of claim 13, wherein:

within the subframe;

another PSS, included in the set of other synchronization signals, is received in a symbol, at the second particular location, that is before a symbol in which another SSS, included in the set of other synchronization signals, is received; and

within the other subframe;

the other PSS, included in the set of other synchronization signals, is received in a symbol, at the first particular location, that is after a symbol in which the other SSS, included in the set of other synchronization signals, is received.

15. The apparatus of claim 11, wherein the instructions are further executable by the processor to:

receive the PSS and the SSS in another subframe of the frame,

wherein the SSS is received in a symbol of the other subframe that is after a symbol of the other subframe in which the PSS is received, and after a set of symbols of the other subframe in which the set of other synchronization signals is received,

wherein the other subframe is after the subframe, and

wherein the apparatus is configured to synchronize with the base station based at least in part on the PSS or the SSS received in the other subframe.

16. An apparatus for wireless communication, comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to;

generate a secondary synchronization signal (SSS) based at least in part on a cell identifier group associated with a base station; and

transmit the SSS and a primary synchronization signal (PSS) in a subframe of a frame,

wherein the SSS is transmitted in a symbol of the subframe that is after a symbol of the subframe in which the PSS is transmitted, and after a set of symbols of the subframe in which a set of other synchronization signals is transmitted.

17. The apparatus of claim 16, wherein the instructions are further executable by the processor to:

transmit the PSS and the SSS in another subframe of the frame,

wherein the SSS is transmitted in a symbol of the other subframe that is before a symbol of the other subframe in which the PSS is transmitted, and before a set of symbols of the other subframe in which the set of other synchronization signals is transmitted,

wherein the other subframe is before the subframe, and

wherein the apparatus is configured to synchronize with a base station based at least in part on the PSS or the SSS transmitted in the other subframe.

18. The apparatus of claim 17, wherein:

within the subframe;

the symbols in which the PSS and the SSS are transmitted are at a first particular location, and

the set of symbols in which the set of other synchronization signals is transmitted is at a second particular location; and

within the other subframe;

the set of symbols in which the set of other synchronization signals is transmitted is at the first particular location, and

the symbols in which the PSS the SSS are transmitted are at the second particular location.

19. The apparatus of claim 18, wherein:

within the subframe;

another PSS, included in the set of other synchronization signals, is transmitted in a symbol, at the second particular location, that is before a symbol in which another SSS, included in the set of other synchronization signals, is transmitted; and

within the other subframe;

the other PSS, included in the set of other synchronization signals, is transmitted in a symbol, at the first particular location, that is after a symbol in which the other SSS, included in the set of other synchronization signals, is transmitted.

20. The apparatus of claim 16, wherein the instructions are further executable by the processor to:

transmit the PSS and the SSS in another subframe of the frame,

wherein the SSS is transmitted in a symbol of the other subframe that is after a symbol of the other subframe in which the PSS is transmitted, and after a set of symbols of the other subframe in which the set of other synchronization signals is transmitted,

wherein the other subframe is after the subframe, and

wherein the apparatus is configured to synchronize with the base station based at least in part on the PSS or the SSS transmitted in the other subframe.

21. A non-transitory computer readable medium storing code for wireless communication, the code comprising instructions executable by a processor to:

receive a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) in subframe of a frame,

wherein the SSS is received in a symbol of the subframe that is after a symbol of the subframe in which the PSS is received, and after a set of symbols of the subframe in which a set of other synchronization signals is received; and

synchronize a user equipment with a base station based at least in part on the PSS and the SSS received in the subframe.

22. The non-transitory computer readable medium of claim 21, wherein the instructions are further executable by the processor to:

receive the PSS and the SSS in another subframe of the frame,

wherein the SSS is received in a symbol of the other subframe that is before a symbol of the other subframe in which the PSS is received, and before a set of symbols of the other subframe in which the set of other synchronization signals is received,

wherein the other subframe is before the subframe, and

wherein the user equipment is configured to synchronize with the base station based at least in part on the PSS or the SSS received in the other subframe.

23. The non-transitory computer readable medium of claim 22, wherein:

within the subframe;

the symbols in which the PSS and the SSS are received are at a first particular location, and

the set of symbols in which the set of other synchronization signals is received is at a second particular location; and

within the other subframe;

the set of symbols in which the set of other synchronization signals is received is at the first particular location, and

the symbols in which the PSS and the SSS are received are at the second particular location.

24. The non-transitory computer readable medium of claim 23, wherein:

within the subframe;

another PSS, included in the set of other synchronization signals, is received in a symbol, at the second particular location, that is before a symbol in which another SSS, included in the set of other synchronization signals, is received; and

within the other subframe;

the other PSS, included in the set of other synchronization signals, is received in a symbol, at the first particular location, that is after a symbol in which the other SSS, included in the set of other synchronization signals, is received.

25. The non-transitory computer readable medium of claim 21, wherein the instructions are further executable by the processor to:

receive the PSS and the SSS in another subframe of the frame,

wherein the SSS is received in a symbol of the other subframe that is after a symbol of the other subframe in which the PSS is received, and after a set of symbols of the other subframe in which the set of other synchronization signals is received,

wherein the other subframe is after the subframe, and

wherein the user equipment is configured to synchronize with the base station based at least in part on the PSS or the SSS received in the other subframe.

26. A non-transitory computer readable medium storing code for wireless communication, the code comprising instructions executable by a processor to:

generate a secondary synchronization signal (SSS) based at least in part on a cell identifier group associated with a base station; and

transmit the SSS and a primary synchronization signal (PSS) in a subframe of a frame,

wherein the SSS is transmitted in a symbol of the subframe that is after a symbol of the subframe in which the PSS is transmitted, and after a set of symbols of the subframe in which a set of other synchronization signals is transmitted.

27. The non-transitory computer readable medium of claim 26, wherein the instructions are further executable by the processor to:

transmit the PSS and the SSS in another subframe of the frame,

wherein the SSS is transmitted in a symbol of the other subframe that is before a symbol of the other subframe in which the PSS is transmitted, and before a set of symbols of the other subframe in which the set of other synchronization signals is transmitted,

wherein the other subframe is before the subframe, and

wherein a user equipment is configured to synchronize with the base station based at least in part on the PSS or the SSS transmitted in the other subframe.

28. The non-transitory computer readable medium of claim 27, wherein:

within the subframe;

the symbols in which the PSS and the SSS are transmitted are at a first particular location, and

the set of symbols in which the set of other synchronization signals is transmitted is at a second particular location; and

within the other subframe;

the set of symbols in which the set of other synchronization signals is transmitted is at the first particular location, and

the symbols in which the PSS the SSS are transmitted are at the second particular location.

29. The non-transitory computer readable medium of claim 28, wherein:

within the subframe;

another PSS, included in the set of other synchronization signals, is transmitted in a symbol, at the second particular location, that is before a symbol in which another SSS, included in the set of other synchronization signals, is transmitted; and

within the other subframe;

the other PSS, included in the set of other synchronization signals, is transmitted in a symbol, at the first particular location, that is after a symbol in which the other SSS, included in the set of other synchronization signals, is transmitted.

30. The non-transitory computer readable medium of claim 26, wherein the instructions are further executable by the processor to:

transmit the PSS and the SSS in another subframe of the frame,

wherein the SSS is transmitted in a symbol of the other subframe that is after a symbol of the other subframe in which the PSS is transmitted, and after a set of symbols of the other subframe in which the set of other synchronization signals is transmitted,

wherein the other subframe is after the subframe, and

wherein a user equipment is configured to synchronize with the base station based at least in part on the PSS or the SSS transmitted in the other subframe.