Patent ID: 6982970

Claim:
A radio terminal for use in a radio system for transferring data between the radio terminal and another radio terminal after establishing a logical connection between the radio terminal and the another radio terminal, the radio terminal comprising: a logical channel set up unit configured to set up at least one first logical channel to transfer data packets containing at least one AV stream, to identify at least one second logical channel, the at least one second logical channel being set up by the another radio terminal to transfer the data packets, to set up at least one third logical channel to transfer a first set of control packets containing first control information regarding transfer of the data packets, and to identify at least one fourth logical channel to transfer a second set of control packets containing second control information regarding transfer of the data packets, the at least one fourth logical channel being set up by the another radio terminal; a memory unit configured to store a correspondence information including a correspondence between the at least one first logical channel and the at least one second logical channel for the at least one AV stream and a correspondence between the at least one third logical channel and the at least one fourth logical channel for the first and second control information; and a packet transmission/reception unit configured to transfer the data packets and the first set and second set of control packets between the radio terminal and the another radio terminal by using the correspondence information.