SYNCHRONIZATION FOR WIDEBAND COVERAGE ENHANCEMENT

• US 20180310267A1
• Filed: 04/10/2018
• Published: 10/25/2018
• Est. Priority Date: 04/19/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: LIU, Chih-Hao, Yerramalli, Srinivas, Kadous, Tamer
• Granted Patent: US 10,609,660 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

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 of a frame. In one example, the PSS may be received in each of a first plurality of consecutive symbols of the subframe. In another example, the SSS may be received in each of a second plurality of consecutive symbols of the subframe, 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 received in the subframe. 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 PSS is received in each of a first plurality of consecutive symbols of the subframe, and

wherein the SSS is received in each of a second plurality of consecutive symbols of the subframe,

wherein the second plurality of consecutive symbols is after the first plurality of consecutive symbols within the subframe; 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, wherein:

the first plurality of consecutive symbols includes fourteen or fewer consecutive symbols of the subframe.

3. The method of claim 1, wherein:

the second plurality of consecutive symbols includes fourteen or fewer consecutive symbols of the subframe.

4. The method of claim 1, further comprising:

determining a physical cell identity, associated with the base station, based at least in part on the SSS and a set of hypotheses associated with the PSS,

wherein the UE is configured to synchronize with the base station based at least in part on the physical cell identity.

5. The method of claim 1, further comprising:

combining the PSS, received in one of the first plurality of consecutive symbols of the subframe, with another PSS received in another symbol,

wherein the UE is configured to synchronize with the base station based at least in part on combining the PSS and the other PSS.

6. The method of claim 1, wherein:

a cover code sequence, associated with the PSS, is a binary cover code.

7. The method of claim 1, wherein:

the SSS is associated with a cell identifier group, associated with the base station, and a subframe offset associated with a reference signal.

8. 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 signals (PSS) in a subframe of a frame,

wherein the PSS is transmitted in each of a first plurality of consecutive symbols of the subframe, and

wherein the SSS is transmitted in each of a second plurality of consecutive symbols of the subframe,

wherein the second plurality of consecutive symbols is after the first plurality of consecutive symbols within the subframe.

9. The method of claim 8, wherein:

the first plurality of consecutive symbols includes fourteen or fewer consecutive symbols of the subframe.

10. The method of claim 8, wherein:

the second plurality of consecutive symbols includes fourteen or fewer consecutive symbols of the subframe.

11. The method of claim 8, wherein:

a cover code sequence, associated with the PSS, is a binary cover code.

12. The method of claim 8, wherein:

the SSS is associated with a cell identifier group, associated with the base station, and a subframe offset associated with a reference signal.

13. 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 PSS is received in each of a first plurality of consecutive symbols of the subframe, and

wherein the SSS is received in each of a second plurality of consecutive symbols of the subframe,

wherein the second plurality of consecutive symbols is after the first plurality of consecutive symbols within the subframe; and

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

14. The apparatus of claim 13, wherein:

the first plurality of consecutive symbols includes fourteen or fewer consecutive symbols of the subframe.

15. The apparatus of claim 13, wherein:

the second plurality of consecutive symbols includes fourteen or fewer consecutive symbols of the subframe.

16. The apparatus of claim 13, wherein the instructions are further executable by the processor to:

determine a physical cell identity, associated with the base station, based at least in part on the SSS and a set of hypotheses associated with the PSS,

wherein the apparatus is configured to synchronize with the base station based at least in part on the physical cell identity.

17. The apparatus of claim 13, wherein the instructions are further executable by the processor to:

combine the PSS, received in one of the first plurality of consecutive symbols of the subframe, with another PSS received in another symbol,

wherein the apparatus is configured to synchronize with the base station based at least in part on combining the PSS and the other PSS.

18. The apparatus of claim 13, wherein:

a cover code sequence, associated with the PSS, is a binary cover code.

19. The apparatus of claim 13, wherein:

the SSS is associated with a cell identifier group, associated with the base station, and a subframe offset associated with a reference signal.

20. 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 PSS is transmitted in each of a first plurality of consecutive symbols of the subframe, and

wherein the SSS is transmitted in each of a second plurality of consecutive symbols of the subframe,

wherein the second plurality of consecutive symbols is after the first plurality of consecutive symbols within the subframe.

21. The apparatus of claim 20, wherein:

the first plurality of consecutive symbols includes fourteen or fewer consecutive symbols of the subframe.

22. The apparatus of claim 20, wherein:

the second plurality of consecutive symbols includes fourteen or fewer consecutive symbols of the subframe.

23. The apparatus of claim 20, wherein:

a cover code sequence, associated with the PSS, is a binary cover code.

24. The apparatus of claim 20, wherein:

the SSS is associated with a cell identifier group, associated with the base station, and a subframe offset associated with a reference signal.