Patent ID: 8179857

Claim:
A method of transmitting a scheduling request in a wireless communication system, the method comprising: determining a subframe for transmitting the scheduling request, the subframe comprising two consecutive slots, each slot comprising a first set of orthogonal frequency division multiple access (OFDM) symbols and a second set of OFDM symbols, wherein the subframe is determined among subframes which belong to a transmission period of the scheduling request; configuring an uplink control channel for transmitting the scheduling request; and transmitting the scheduling request on the uplink control channel in the subframe, wherein configuring the uplink control channel comprises, for the OFDM symbols in each slot: mapping a corresponding one of a plurality of frequency domain sequences to each OFDM symbol in the first set of OFDM symbols, thereby generating a first set of mapped frequency domain sequences; mapping a corresponding one of the plurality of frequency domain sequences to each OFDM symbol in the second set of OFDM symbols, thereby generating a second set of mapped frequency domain sequences; spreading the first set of mapped frequency domain sequences with a first orthogonal sequence, the first orthogonal sequence having a length equal to the number of OFDM symbols in the first set of OFDM symbols; and spreading the second set of mapped frequency domain sequences associated with each of the OFDM symbols in the second set of OFDM symbols with a second orthogonal sequence, the second orthogonal sequence having a length equal to the number of OFDM symbols in the second set of OFDM symbols.