Patent ID: 7672322

Claim:
A method of transmitting H.245 messages with increased speed and reliability using a sliding window in a numbered simple retransmission protocol (WNSRP) which allows reduction of a number of sequential round-trips by parallelization of one or more WNSRP frames, the method being provided between at least a pair of H.324 devices, the method comprising: providing a control channel between the first device and the second device; determining a mobile level for operation; and performing two or more transmitting processes within a round trip cycle time using the first device, wherein the two or more transmitting processes include at least a first WNSRP command frame characterized by a first content and associated with a first WNSRP response frame and at least a second WNSRP command frame characterized by a second content and associated with a second WNSRP response frame, the two or more transmitting processes comprising: transmitting the first WNSRP command frame from the first device to the second device through the control channel; and transmitting the second WNSRP command frame from the first device to the second device through the control channel prior to receiving the first WNSRP response frame from the second device in response to the first WNSRP command frame.