METHOD AND APPARATUS FOR MANAGING UPLINK TIME ALIGNMENT

摘要

A method and apparatus of managing uplink time alignment in a wireless communication system is provided. A user equipment starts a time alignment timer which is used to control how long the user equipment is considered uplink time aligned and receives an expiry request message from a base station while the time alignment timer is running. Upon receiving the expiry request, the user equipment expirs the time alignment timer and releasing uplink resources.