A DESIGN APPROACH FOR INTRA CLUSTER DEVICE-TO-DEVICE COMMUNICATION WITH MINIMAL RESOURCE UTILIZATION

Device-to-device (D2D) communications help to improve the performance of wireless multicast services in cellular networks via cooperative retransmissions amongst multicast recipients within a cluster. Device-to-Device (D2D) communication is considered to be a promising resource reuse technology for local services, to meet the system demands of higher data rates and spectrum efficiency in future networks. Resource utilization efficiency should be taken into account in design of D2D communication systems .To maximize resource efficiency of D2D retransmissions, there is a tradeoff between multi-channel diversity and multicast gain .An intra-cluster D2D retransmission scheme with optimized resource utilization, which can adaptively select the number of cooperative relays performing multicast retransmissions and give an iterative sub-cluster partition algorithm to enhance retransmission throughput. Exploiting multi-channel diversity and multicast gain, the proposed scheme achieves a significant gain in terms of resource utilization if compared to its counterparts with a fixed number of relays.