Patent ID: 8787238

Claim:
A method of multicasting data in a wireless communication network, comprising: transmitting, by a transmitter, a first multicasting frame, the first multicasting frame including a first receiver address, a first transmitter address and a first retry bit, the first receiver address including a first multicasting address, the first retry bit being set to zero; and transmitting, by the transmitter, a second multicasting frame, the second multicasting frame including a second receiver address, a second transmitter address and a second retry bit, the second receiver address including a second multicasting address, the second transmitter address being same as the first transmitter address, the second retry bit being set to one, wherein, if the second multicasting frame is a retransmission of the first multicasting frame, the second multicasting address is different from the first multicasting address, wherein the first and second multicasting addresses each include a corresponding plurality of bits, and wherein at least one bit of the second multicasting address is set to a different value than at least corresponding bit of the first multicasting address so that a legacy receiving device which does not support multicast retransmission does not process the second multicasting frame.