Patent ID: 8400986

Claim:
A Node B configured to provide access to a wireless communications system, the Node B comprising: a processing device and associate transmitting device configured to transmit random access channel (RACH) assignment information indicating subchannels to be used to transmit a combines phase of a constant amplitude zero autocorrelation (CAZAC) sequence and a cyclic prefix to a wireless transmit/receive unit (WTRU); a processing device and an associated receiving device configured to receive the combined phase of the CAZAC sequence and the cyclic prefix over a RACH from the WTRU; the processinf device and an associated transmitting device are further configured to transmit an indication over a shared channel that the phase of the CAZAC sequence was received to the the WTRU, wherein the indication includes a timing advance (TA); and the processing device and the associated receiving device are further configured to receive a signal including access message data and reference symbols with a transmission timing based on the TA from the WTRU; wherein the reference symbols are derived from the CAZAC sequence.