METHOD AND APPARATUS FOR CONTROLLING UPLINK TRANSMISSION TIMING IN A COMMUNICATION NETWORK

摘要

A method and corresponding system for controlling uplink timing in a communication network (100) is described. The method comprises of scheduling a mobile device (104) to transmit a preamble over a physical random access channel. The mobile device (104) is scheduled to transmit the preamble over a physical random access channel at a selected random access slot. The method then includes receiving the preamble transmitted by the scheduled mobile device (104). The preamble is received over the physical random access channel. The method further comprises measuring a timing offset at which the preamble is received from the scheduled mobile device (104) and determining a timing adjustment value in uplink transmission timing based on the measured timing offset. The method then comprises transmitting a timing advance command comprising the determined timing adjustment value in a control message to the mobile device (104) for controlling uplink transmission timing at the mobile device (104).