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In this paper, WiMedia Distributed-MAC protocol is adopted for development of a seamless N-screen wireless service. Furthermore, to provide the OSMU (One Source Multi Use) N-screen service through P2P streaming in the seamless D-MAC protocol, a new Multicast-free DRP Availability IE is proposed and analyzed. In this Multicast-free DRP Availability IE, indicating Multicast DRP Owner and Receiver is required. The ACK frame transmissions are not required for Multicast transmissions in P2P N-screen services. Using this property, the Multicast-free DRP Availability IE scheme is proposed to expand the number of time slots available for unicast and multicast DRP reservations. Simulation results show that our Multicast scheme enhances performances in vewpoints of DRP reservation conflict and throughput.  : N-, , WiMedia, ,  MAC Key word : N-screen, Home Networks, WiMedia, Multicast, Wireless MAC Journal of the Korea Institute of Information and Communication Engineering (J. Korea Inst. Inf. Commun. Eng.) Vol. 19, No. 4 : 813~818 Apr. 2015

Efficient Multicast Transmission Scheme in WiMedia D-MAC for Seamless N-Screen Services