Performance Analysis of CRDSA Based on M2M Flow Model

Internet of Things (IoT) is an important application scenario in the fifth generation of mobile communications. Machine to machine (M2M) is the most common form of IoT application at present. With the rapid development of IoT in the world in recent years, M2M systems have been widely used in various fields. M2M system data transmission can be combined with satellites. In this paper, the flow model of M2M is presented, and then the access protocol of contention resolution diversity slot ALOHA (CRDSA) is deeply analyzed in the satellite M2M scenario. According to its transmission mechanism, the throughput boundary is derived, and then the continuous interference cancellation is combined with diversity slot ALOHA, which greatly improves the throughput. The simulation results show that the CRDSA scheme can actually run under a standardized load up to 0.4, which allows the transmission of small and medium-sized burst packets without allocating resources, just like the operation mode of satellite broadband network.