US 10,512,050 B2
Synchronization and broadcast channel design with flexible bandwidth allocations
Sony Akkarakaran, Poway, CA (US); Tao Luo, San Diego, CA (US); and Xiaoxia Zhang, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Oct. 5, 2017, as Appl. No. 15/726,345.
Claims priority of provisional application 62/405,860, filed on Oct. 7, 2016.
Prior Publication US 2018/0103445 A1, Apr. 12, 2018
Int. Cl. H04W 56/00 (2009.01); H04J 11/00 (2006.01); H04J 3/06 (2006.01); H04L 5/00 (2006.01); H04W 72/00 (2009.01); H04W 88/02 (2009.01)
CPC H04W 56/001 (2013.01) [H04J 3/06 (2013.01); H04J 11/00 (2013.01); H04J 11/0083 (2013.01); H04L 5/0048 (2013.01); H04W 72/005 (2013.01); H04W 88/02 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method for wireless communications by a user equipment (UE), comprising:
detecting a synchronization channel and a secondary synchronization signal (SSS) transmitted with the synchronization channel by searching for one or more synchronization channels according to a synchronization channel raster, that is not centered around a direct current (DC) tone of a system bandwidth, the synchronization channel raster having a coarser granularity than a channel raster for other channels in the system bandwidth;
receiving a reference signal for demodulation (DMRS), other than a cell-specific reference signal, wherein a sequence of the DMRS is independent of at least one of a downlink bandwidth or a location of the synchronization channel within the system bandwidth;
demodulating a physical broadcast channel (PBCH) transmitted in the synchronization channel based on at least one of the DMRS and the SSS; and
determining the system bandwidth corresponding to the downlink bandwidth based at least in part on the PBCH.