发明申请
US20070064665A1 Method and apparatus for accessing an uplink random access channel in a single carrier frequency division multiple access system
审中-公开
用于在单载波频分多址系统中访问上行随机接入信道的方法和装置
- 专利标题： Method and apparatus for accessing an uplink random access channel in a single carrier frequency division multiple access system
- 专利标题（中）： 用于在单载波频分多址系统中访问上行随机接入信道的方法和装置
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申请号： US11507712申请日： 2006-08-21
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公开(公告)号： US20070064665A1公开(公告)日： 2007-03-22
- 发明人: Guodong Zhang , Jung-Lin Pan , Yingming Tsai
- 申请人： Guodong Zhang , Jung-Lin Pan , Yingming Tsai
- 申请人地址： US DE Wilmington 19810
- 专利权人： InterDigital Technology Corporation
- 当前专利权人： InterDigital Technology Corporation
- 当前专利权人地址： US DE Wilmington 19810
- 主分类号： H04J1/00
- IPC分类号： H04J1/00
摘要：
A method and apparatus for accessing a contention-based uplink random access channel (RACH) in a single carrier frequency division multiple access (SC-FDMA) system are disclosed. A wireless transmit/receive unit (WTRU) randomly selects a RACH subchannel and a signature among a plurality of available RACH subchannels and signatures. The WTRU transmits a preamble using the selected signature via the selected RACH subchannel at a predetermined or computed transmission power. A base station monitors the RACH to detect the preamble and sends an acquisition indicator (AI) to the WTRU when a signature is detected on the RACH. When receiving a positive acknowledgement, the WTRU sends a message part to the base station. If receiving a negative acknowledgement or no response, the WTRU retransmits the preamble.
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