| US 7,496,113 B2 | ||
| Fast cell search and accurate synchronization in wireless communications | ||
| Sean Cai, San Diego, Calif. (US); Wenzhong Zhang, San Diego, Calif. (US); Jing Wang, San Diego, Calif. (US); Jason Hou, Carlsbad, Calif. (US); Yonggang Fang, San Diego, Calif. (US); and Yunsong Yang, San Diego, Calif. (US) | ||
| Assigned to ZTE (USA) Inc., Iselin, N.J. (US) | ||
| Filed on Aug. 16, 2005, as Appl. No. 11/205,774. | ||
| Claims priority of provisional application 60/601790, filed on Aug. 16, 2004. | ||
| Prior Publication US 2006/0062196 A1, Mar. 23, 2006 | ||
| Int. Cl. H04J 3/06 (2006.01) | ||
| U.S. Cl. 370—474 [455/450; 370/475; 370/476; 370/514] | 54 Claims |
| 1. A method for wireless communications, comprising:
using a cell identification sequence as a leading symbol of and as at least part of a preamble of every downlink subframe
in time of a downlink signal from a base station to a mobile station, wherein the cell identification sequence is one of a
set of cell identification sequences and is designated to identify a base station and a cell sector of the base station;
including at least one data symbol, at a position subsequent to the cell identification sequence in time, in every downlink
subframe of the downlink signal; and
including in every other L frames of the downlink signal, at a position subsequent to the cell identification sequence in
time, a symbol comprising a plurality of copies of a sequence placed sequentially in time,
wherein L is an integer greater than 0 and the sequence is common to at least a portion of base stations with which the mobile
station is communicating.
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