发明授权
- 专利标题: Cell search based on beacon in a wireless communication system
- 专利标题(中): 基于无线通信系统中的信标的小区搜索
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申请号: US12444577申请日: 2007-11-06
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公开(公告)号: US08498242B2公开(公告)日: 2013-07-30
- 发明人: Tao Luo , Durga Prasad Malladi , Hao Xu
- 申请人: Tao Luo , Durga Prasad Malladi , Hao Xu
- 申请人地址: US CA San Diego
- 专利权人: QUALCOMM Incorporated
- 当前专利权人: QUALCOMM Incorporated
- 当前专利权人地址: US CA San Diego
- 代理商 Liem T. Do
- 国际申请: PCT/US2007/083821 WO 20071106
- 国际公布: WO2008/058150 WO 20080515
- 主分类号: H04W4/00
- IPC分类号: H04W4/00 ; H04J4/00 ; H04B7/00
摘要:
Techniques for transmitting beacon signals to assist user equipments (UEs) perform cell search and techniques for detecting for beacon signals are described. In an aspect, cells may be assigned beacon patterns defined based on orthogonal grouping of subcarriers. U subcarriers usable for beacon may be arranged into G orthogonal groups, with each group including S subcarriers. P=SG different beacon patterns may be defined based on the G groups of S subcarriers. In another aspect, the cells may transmit their beacon signals at configurable transmit power levels, which may be determined based on target beacon detection performance. In yet another aspect, a UE may perform overlapping DFTs in order to capture more received power when symbol timing at the UE is not aligned with symbol timing of cells being detected. In yet another aspect, the UE may perform beacon detection with maximal likelihood decoding.
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