Patent ID: 8897193
Filing Date: 2014-11-25
Classification: H04H,H04L

Abstract:
1. A multicast packet transmitting and receiving method over a wireless communication network, the method comprising: transmitting a multicast packet from a sender to a plurality of receivers via a wireless channel; receiving the multicast packet at each of the plurality of receivers; determining whether a transmission error occurs in the multicast packet; and simultaneously transmitting retransmission requests from the plurality of receivers to the sender via the wireless channel by synchronizing a transmission timing of the plurality of receivers, according to a result of the determining, wherein the retransmission requests have an identical destination address (DA) and an identical source address (SA), wherein a retransmitting operation of the multicast packet is performed if a number of times of transmission of the multicast packet is not greater than a predetermined threshold, and wherein a channel coding rate of the multicast packet is increased when previously transmitted sequential multicast packets are successfully transmitted for a predetermined number of times without a retransmission.