Method and apparatus for ranging power control for machine-to-machine communications

摘要

A wireless transmit/receive unit (WTRU) may select a ranging code and a ranging opportunity randomly for a ranging procedure. After sending the selected ranging code in the selected ranging opportunity, if a collision is detected, the base station may send a broadcast message including a ranging channel collision notification indicating occurrence of a collision. In that case, the WTRU may select another ranging code and another ranging opportunity, and send the ranging code without increasing a transmit power. The broadcast message may include a ranging region identification where the collision occurred.