Patent ID: 8649363

Claim:
A method of hybrid automatic repeat request (HARQ) entity handling for a communication device capable of receiving and transmitting on a plurality of component carriers in a wireless communication system, the method comprising: resetting a HARQ entity associated to a component carrier of the plurality of component carriers when a component carrier configuration associated to the component carrier is changed; and maintaining at least one of a time alignment timer running, ongoing random access procedure, triggered scheduling request procedure, triggered buffer status reporting procedure, triggered power headroom reporting procedure, and temporary cell radio network temporary identifier (C-RNTI), comprising at least one of: determining the time alignment timer, which is used to control how long the communication device is considered uplink time aligned, as not expired when the time alignment timer is utilized not only for the component carrier; maintaining the ongoing random access procedure when the ongoing random access procedure is not performed in the component carriers; and maintaining the triggered scheduling request procedure when the triggered scheduling request procedure is not performed in the component carrier.