连续时间两级完全轮询接入MAC协议分析

针对物联网中优先级业务和实时性的需求,提出一种连续时间两级完全轮询接入MAC协议.在连续时间的基础上,将用户划分为优先级用户和普通用户,采用完全服务规则对用户提供服务来降低平均等待时延.当优先级用户向普通用户切换时,将服务时间和切换时间并行处理来提高系统的服务效率.使用随机过程和概率母函数的方法建立数学模型,对该协议用...

Analysis of Continuous Time Two-Level Exhaustive Polling Access MAC Protocol

To meet the requirements of priority traffic and real-time performance in the Internet of things（IoT）, a continuous time two-level exhaustive polling access MAC protocol is proposed. On the basis of continuous time, users are divided into priority users and ordinary users, and exhaustive service rule is used to provide services to users to reduce the average waiting delay. When priority users switch to ordinary users, the service time and switching time are processed in parallel to improve the service efficiency of the system. Then a mathematical model is established by using the method of random process and probability generating function, and the average queue length and average waiting time of the users of the protocol are precisely analyzed and verified by simulation experiments. The experimental results show that the theoretical value is consistent with the experimental value, the protocol can distinguish the services with different priorities, and the average waiting delay of users is low.