发明授权
US08774113B2 Random access procedure utilizing cyclic shift of demodulation reference signal
有权
利用解调参考信号循环移位的随机接入程序
- 专利标题: Random access procedure utilizing cyclic shift of demodulation reference signal
- 专利标题(中): 利用解调参考信号循环移位的随机接入程序
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申请号: US13381750申请日: 2009-09-21
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公开(公告)号: US08774113B2公开(公告)日: 2014-07-08
- 发明人: Daniel Larsson , Tobias Tynderfeldt , Fredrik Huss
- 申请人: Daniel Larsson , Tobias Tynderfeldt , Fredrik Huss
- 申请人地址: SE Stockholm
- 专利权人: Telefonaktiebolaget L M Ericsson (publ)
- 当前专利权人: Telefonaktiebolaget L M Ericsson (publ)
- 当前专利权人地址: SE Stockholm
- 国际申请: PCT/SE2009/051046 WO 20090921
- 国际公布: WO2011/005163 WO 20110113
- 主分类号: H04W72/04
- IPC分类号: H04W72/04
摘要:
A method and apparatus for accessing a wireless communication system, and for processing random access attempts. A mobile communication device detects random-access information transmitted by a base station, transmits a random-access preamble to the base station according to the random-access information, and receives a random-access response from the base station. The random-access response includes at least an allocation of uplink resources to be used for the next step in the random access procedure. The mobile device also selects a reference signal sequence index from a pre-determined set of sequence indexes, and transmits a first message to the base station using the uplink resource allocation provided in the random-access response. The first message includes a device identifier and a first demodulation reference signal derived from a base reference sequence shifted according to the selected sequence index.
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