Patent ID: 8254333

Claim:
A method for improving a buffer status triggering mechanism of a communications layer for a mobile device of a wireless communication system, the method comprising: receiving an indication indicating that uplink data becomes data available for transmission in an upper layer of the communications layer; when data available for transmission other than the uplink data is included in a transmission buffer of the upper layer, determining whether a logical channel corresponding to any data of the uplink data has higher priority than logical channels corresponding to the data available for transmission in the transmission buffer; when the logical channel corresponding to any data of the uplink data has higher priority than the logical channels corresponding to the data available for transmission in the transmission buffer, triggering a buffer status report; and when the uplink data is already available for transmission in the transmission buffer and is data that needs to be retransmitted, and when the transmission buffer includes no other data available for transmission, triggering a buffer status report.