发明名称 |
METHOD AND APPARATUS FOR ACCESSING AN UPLINK RANDOM ACCESS CHANNEL IN A SINGLE CARRIER FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM |
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. |
申请公布号 |
US2013322386(A1) |
申请公布日期 |
2013.12.05 |
申请号 |
US201313963487 |
申请日期 |
2013.08.09 |
申请人 |
INTERDIGITAL TECHNOLOGY CORPORATION |
发明人 |
ZHANG GUODONG;TSAI ALLAN Y.;PAN KYLE JUNG-LIN |
分类号 |
H04W74/08;H04W72/04 |
主分类号 |
H04W74/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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