METHOD AND APPARATUS FOR CONTROL OF UPLINK FEEDBACK INFORMATION IN CONTENTION BASED ACCESS IN WIRELESS COMMUNICATIONS

摘要

PROBLEM TO BE SOLVED: To provide a method and apparatus for transmitting uplink feedback information by a WTRU in a CELL_FACH state.SOLUTION: Uplink feedback information such as CQI and HARQ ACK/NACK information may be transmitted to the UTRAN by a wireless transmit/receive unit (WTRU). An E-DCH resource for UL transmission is received, assignment of contention-free access is received, and a configuration from the network to send UL feedback information is also received. In a different embodiment, uplink feedback information is transmitted on the basis of existence of at least a predetermined condition, that is, explicit and implicit triggers.