Patent ID: 7756023

Claim:
A method of transmitting data over a radio channel between two radio interfaces in a data transmission network that support a plurality of physical transmission modes at different bandwidths, the data transmission network comprising a first group of nodes having a first radio interface configured to support the plurality of physical transmission modes and a second group of nodes having a second radio interface configured to support the plurality of physical transmission modes, the method comprising: establishing more than one group of virtual channels on the radio channel, each group having an allocated bandwidth to transmit data between the first and second groups of nodes, such that the sum of the allocated bandwidths does not exceed a total bandwidth of the radio channel operating in a basic transmission mode; detecting a transmission quality of the radio channel; based on the detected transmission quality, operating the radio channel in a selected transmission mode having a greater bandwidth than that of the basic transmission mode; and allocating the difference in the bandwidths between the selected transmission mode and the basic transmission mode to the groups of virtual channels such that one or more of the groups of virtual channels operate at a bandwidth that is greater than their allocated bandwidth.