Data transfer method using layer 2 signaling of protocol identifier, radio terminal and radio gateway device

摘要

A radio terminal (901,902) or gateway capable of executing the AV/C protocol on the datalink protocol which starts communications after setting up a logical channel on a radio network (90) is disclosed. The radio terminal (901,902) or gateway transfers data packets according to the stored correspondence information among the protocol identifier (P), the channel identifier that is set up for the radio terminal (901,902) or gateway, and the channel identifier that is set up for a correspondent radio terminal (901,902) or gateway, where the correspondence information is obtained through an exchange of signalling packets containing the channel identifier indicating a logical channel that is set up for transferring the data packets and the protocol identifier (P) indicating the AV control protocol.