Title:
A method and a device for accessing the uplink random access channel in a SC-FDMA system
Document Type and Number:
Japanese Patent JP6034226
Kind Code:
B2
Abstract:
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
Inventors:
Jang Guo Dong
Kyle Jun-Rinpan
Alan Wai. Tsai
Kyle Jun-Rinpan
Alan Wai. Tsai
Application Number:
JP2013058657A
Publication Date:
November 30, 2016
Filing Date:
March 21, 2013
Export Citation:
Assignee:
Interdigital Technology Corporation
International Classes:
H04W52/08; H04W74/08
Domestic Patent References:
| JP2002528997A | ||||
| JP2003179576A | ||||
| JP2001237780A | ||||
| JP200488207A |
Foreign References:
| WO2005039128A1 |
Other References:
Presentation of Specification to TSG RAN WG1 adhoc on LTE,TSG-RAN WG1 adhoc,3GPP,2005年 6月30日,R1-050682
Attorney, Agent or Firm:
Patent Business Corporation Tani/Abe Patent Office
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