Reliable multicast data retransmission method by grouping wireless terminal in wireless communication, and apparatus thereof

摘要

This invention is to reduce the packet loss which occurs when transmitting the multicast data to the wireless terminal in a wireless communication environment, It relates to a method for, in particular, to a multicast data retransmission method, while maintaining the reliability and the efficiency increased to perform retransmission of the network, as needed by the group to group wireless terminals. Multicast data retransmission method of the present invention is selected for a repeater to retransmit step, the multicast packets from each group to have the distance and signal strength information from the wireless terminal to the multicast group of the subject wireless terminal a wireless terminal and a step of the repeater is the multicast repeater again determining order to perform retransmission, to create a multicast packet train header according to the choice of the order of the steps and a multi-cast packet to be transmitted to this mobile terminal. The method of the present invention has the effect that ensure reliable packet transmission, and channel characteristics are reflected in the retransmission.