Cooperative Contention Resolution Diversity Slotted ALOHA with Transmit Power Diversity for Multi-Satellite Networks

In this paper, cooperative contention resolution diversity slotted ALOHA (CRDSA) with transmit power diversity is proposed for multi-satellite networks with partly overlapped coverage areas. The proposed scheme combines packet and power diversity transmission with efficient interference cancellation (IC) technique, which greatly improves the throughput. The packet loss ratio (PLR) of cooperative CRDSA with transmit power diversity is derived, and by using it as a fitness function, we formulate an optimization problem to find the optimized transmit power distribution, which further improves the throughput of cooperative CRDSA. Simulation results show that the cooperative CRDSA with optimized transmit power distribution remarkably outperforms the one with uniform transmit power distribution in terms of throughput.