Patent ID: 7911969

Claim:
A wireless communication method for transmitting a status report for a sequence of data transmitted via a wireless communication link between a wireless device and a network having a plurality of base stations, the wireless communication link having a data unit transmitting side and a data unit receiving side, the method comprising: determining, at a Packet Data Convergence Protocol (PDCP) layer located above a Radio Link Control (RLC) layer in the data unit receiving side, status information on data units of the sequence, the status information indicating whether or not a data unit of the data units has been received at the data unit receiving side for each of the data units; constructing a PDCP status report, in accordance with determined status information for data units of the sequence, from the PDCP layer in the data unit receiving side, wherein the PDCP status report is used by a peer PDCP layer of the data unit transmitting side and contains a pointer designating a sequence number of a first non-received data unit in the sequence and a bitmap providing the determined status information for a set of data units immediately following the first non-received data unit in the sequence, such that the sequence number of the first non-received data unit can always be determined even when there is no in sequence received data unit; and transmitting the PDCP status report from the data unit receiving side to the data unit transmitting side.