Patent ID: 7395481
Filing Date: 2008-07-01
Classification: H04L,H04W

Abstract:
1. A method of implementing a sliding window protocol for transmitting frames in a communication system, the method comprising: at a data receiving unit, identifying a failure to successfully receive a lost frame sent over a first data channel from a data sending unit implementing a sliding window under the sliding window protocol, wherein the lost frame has a sequence number; establishing a second data channel between the data sending unit and the data receiving unit responsive to the identifying step; sending a request for retransmission of the lost frame over the established second data channel; and receiving a retransmission of the lost frame over the established second data channel, wherein use of the second data channel allows the sliding window at the data sending unit to be advanced beyond the sequence number of the lost frame prior to receiving an acknowledgement of receipt of the lost frame from the data receiving unit.