| 摘要 |
PROBLEM TO BE SOLVED: To provide techniques for utilizing a plurality of uplink carriers and downlink carriers.SOLUTION: A wireless transmit/receive unit (WTRU) activates a primary uplink carrier and a primary downlink carrier and activates or deactivates a secondary uplink carrier on the basis of a signal from a network or upon detection of a pre-configured condition. The WTRU deactivates the secondary uplink carrier on the basis of inactivity of the E-DCH transmission, a buffer status, a channel condition, or power constraints. When the secondary uplink carrier is activated, DPCCH transmission is initiated predetermined time periods prior to initiating E-DCH transmissions. The initial DPCCH transmission power is set on the basis of a DPCCH transmission power on the primary uplink carrier or to a value signaled by a network. |
