发明授权
US08345589B2 Method and apparatus for determining timing for initial ranging of user equipment using ranging of adjacent pieces of user equipment in multi-hop mobile relay system
有权
用于使用多跳移动中继系统中的相邻用户设备的测距来确定用户设备的初始测距的定时的方法和装置
- 专利标题: Method and apparatus for determining timing for initial ranging of user equipment using ranging of adjacent pieces of user equipment in multi-hop mobile relay system
- 专利标题(中): 用于使用多跳移动中继系统中的相邻用户设备的测距来确定用户设备的初始测距的定时的方法和装置
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申请号: US12518246申请日: 2007-10-31
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公开(公告)号: US08345589B2公开(公告)日: 2013-01-01
- 发明人: Hyun-Jae Kim , Young-Il Kim
- 申请人: Hyun-Jae Kim , Young-Il Kim
- 申请人地址: KR Daejeon
- 专利权人: Electronics and Telecommunications Research Institute
- 当前专利权人: Electronics and Telecommunications Research Institute
- 当前专利权人地址: KR Daejeon
- 代理机构: Staas & Halsey LLP
- 优先权: KR10-2006-0125027 20061208
- 国际申请: PCT/KR2007/005467 WO 20071031
- 国际公布: WO2008/069457 WO 20080612
- 主分类号: H04B7/14
- IPC分类号: H04B7/14
摘要:
Provided is a method and apparatus for determining timing for initial ranging of user equipment by using ranging of adjacent pieces of user equipment in a multi-hop mobile relay (MMR) system, and more particularly, a method and apparatus for determining timing for initial ranging of user equipment in which a power value and a timing value for periodic ranging of adjacent pieces of user equipment are measured so as to minimize an uplink timing error of a base station. In the MMR system, user equipment transmits an initial ranging code to the base station with irregular timing while not knowing an exact start point of an uplink of the base station. In particular, if the user equipment attempts the initial ranging at the same time as when adjacent pieces of user equipment attempt the periodic ranging and the handover ranging, an error occurs between transmission timing of the initial ranging and uplink timing, thereby acting as an inter-symbol interference (ISI) and inter-channel interference (ICI) of different ranging. As a result, the initial ranging acts as an interference signal in a ranging process of adjacent pieces of user equipment. However, the apparatus and method can minimize a timing error of the initial ranging code of user equipment by avoiding the initial ranging acting as the interference signal.