Multicast transmission terminal, multicast reception terminal, multicast system, computer readable storage device, multicast transmission method, and multicast reception method

摘要

Provided is a multicast transmission terminal including: a transmission/reception unit that performs multicast transmission using a predetermined center frequency and a bandwidth, and receives acknowledgement transmitted using a center frequency different from the center frequency of the multicast transmission and a bandwidth narrower than the bandwidth of the multicast transmission; a discovery unit that transmits an inquiry packet in a broadcast manner and discovers reception terminals (destinations of the multicast transmission); an allocation unit that allocates a center frequency used when the reception terminal transmits the acknowledgement in response to the number of reception terminals discovered by the discovery unit, allocates the center frequency different from the center frequency of the multicast transmission to the reception terminal, and generates an allocation list indicating the allocation; and a notification control unit that allows the unit to transmit the allocation list in multicast manner.