Patent ID: 6847651

Claim:
A method for communicating packet data units in a radio communication system including a first base station supporting both speech and data packet communication with a number of radio units, where said first base station includes a first transceiver unit communicating a speech call with a first radio unit on a speech traffic channel mapped on a first basic physical channel, and where a discontinuous transmission mode can be activated on said first speech traffic channel, characterised in that the method comprises the step of: communicating packet data units between said first transceiver unit and a second radio unit on a packet data channel mapped on a second basic physical channel when said discontinuous transmission mode is activated on said first speech traffic channel and where said second basic physical channel is different from said basic physical channel; and switching said second basic physical channel with said mapped packet data channel from said first transceiver unit to a second transceiver unit in said first base station if said discontinuous transmission mode on said first speech traffic channel is deactivated and a discontinuous transmission mode on a second speech traffic channel mapped on a third basic physical channel in said second transceiver unit is activated.