Patent ID: 8190098

Claim:
A method of operating a packet data multicast communication system comprising a first station and a plurality of second stations, the first and second stations having transceiving equipment for communication between the first and second stations, the method comprising: the first station transmitting a data packet and at least one of the plurality of the second stations receiving the data packet, wherein the at least one of the plurality of the second stations measuring the quality of reception of the received data packet, and determining at the plurality of second stations into which one of at least three predetermined quality ranges the measured quality falls, formulating response types based on the determined quality range; evaluating at the first station a relation between the response types and forming a correspondence to at least two non-contiguous ones of the quality ranges based on the relation; and adopting at the first station a respective subsequent transmitter behaviour based on the correspondence; wherein the subsequent transmitter behaviour corresponding to at least two non-contiguous ones of the quality ranges is identical, wherein the subsequent transmitter behaviour includes adjusting at least one transmitter parameter of the first station such that the at least one transmitter parameter corresponding to the at least two non-contiguous ones of the quality ranges is identical; and wherein the data packets falling into one quality range influence concurrent or subsequent retransmission decisions regarding the data packets falling into another quality range.