Patent ID: 8228889

Claim:
A communication apparatus, comprising: a generator configured to generate a single first physical frame including a first data with a first traffic identifier for identifying a first priority of the first data and a second data with a second traffic identifier for identifying a second priority of the second data, wherein the first traffic identifier and the second traffic identifier are different from each other; a transmitter configured to transmit the first physical frame in a communication period given by a polling frame; and a receiver configured to receive a first acknowledgement information and a second acknowledgement information in a communication period given by a polling frame, the first acknowledgement information corresponding to the first traffic identifier and including a first reception state of at least the first data, the second acknowledgement information corresponding to the second traffic identifier and including a second reception state of at least the second data, wherein the receiver is configured to receive a single second physical frame including both the first acknowledgement information and the second acknowledgement information, the second physical frame includes a MAC header, the first acknowledgement information, the second acknowledgement information, and a first frame check sequence, the first acknowledgement information includes a first starting sequence number and a first bitmap, the first starting sequence number corresponding to the first traffic identifier, the first bitmap indicating at least the first reception state corresponding to the first traffic identifier, and the second acknowledgement information includes a second starting sequence number and a second bitmap, the second starting sequence number corresponding to the second traffic identifier, the second bitmap indicating at least the second reception state corresponding to the second traffic identifier.