Invention Grant
- Patent Title: Cell search based on beacon in a wireless communication system
- Patent Title (中): 基于无线通信系统中的信标的小区搜索
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Application No.: US12444577Application Date: 2007-11-06
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Publication No.: US08498242B2Publication Date: 2013-07-30
- Inventor: Tao Luo , Durga Prasad Malladi , Hao Xu
- Applicant: Tao Luo , Durga Prasad Malladi , Hao Xu
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agent Liem T. Do
- International Application: PCT/US2007/083821 WO 20071106
- International Announcement: WO2008/058150 WO 20080515
- Main IPC: H04W4/00
- IPC: H04W4/00 ; H04J4/00 ; H04B7/00

Abstract:
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.
Public/Granted literature
- US20100091702A1 Cell search based on beacon in a wireless communication system Public/Granted day:2010-04-15
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