METHOD FOR AN MBMS FEEDBACK FOR E-MBS ADAPTATION, PARTICULARLY FOR INCREASING THE TRANSMISSION PERFORMANCE OF MBS

摘要

PURPOSE: A method for an MBMS feedback for E-MBS(Multicast Broadcast Service) adaptation is provided to apply an AMC(Adaptive Modulation and Coding) by using an NACK(Negative ACKnowledgement) feedback.;CONSTITUTION: When a base station transmits an MBS packet(S801), a terminal measures a PER(Packet Error Rate) value. If the measured PER value is larger than a predetermined value, the terminal transmits the NACK(S802). When the NACK are transmitted from mobile stations that are larger than the predetermined number, the base station increases the MCS level(S804). If the NACK is transmitted from the terminals that are smaller than the predetermined number, the base station lowers the MCS level.;COPYRIGHT KIPO 2010