Patent ID: 8045589

Claim:
A radio communication system comprising: a transmission-side radio communication apparatus; and a reception-side radio communication apparatus configured to perform radio communication with the transmission-side radio communication apparatus, wherein the transmission-side radio communication apparatus includes: a relay unit configured to receive a first data frame to be transmitted to the reception-side radio communication apparatus, and to then relay the first data frame to the reception-side radio communication apparatus; an address detector configured to detect a first source address, which is included in the first data frame received by the relay unit, and which is permanently assigned to a source device of the first data frame; a source address information notification unit configured to notify the reception-side radio communication apparatus of omitted-source-address information indicating the first source address detected by the address detector; a determination unit configured to determine whether or not the first source address, of which the source address information notification unit notifies the reception-side radio communication apparatus, is identical to a second source address included in a second data frame received by the relay unit, and permanently assigned to a source device of the second data frame; and a data structure change unit configured to change the structure of the second data frame if the determination unit determines that the first source address is identical to the second source address, wherein the data structure change unit omits transmission of the second source address included in the second data frame, and also adds, to the second data frame, an omission indication indicating that the second source address is omitted, and the reception-side radio communication apparatus includes: a receiver configured to receive the first data frame, the omitted-source-address information and the second data frame from the transmission-side radio communication apparatus; and a device identification unit configured to identify the source device of the second data frame on the basis of the omitted-source-address information received by the receiver, if the omission indication is added to the second data frame received by the receiver.