联合功率域SPMA协议的动态阈值算法  

Dynamic threshold algorithm for SPMA protocol in joint power domain

作　　者：方宇 吕娜 陈坤[1] FANG Yu;LYU Na;CHEN Kun(College of Information and Navigation, Air Force Engineering University, Xi’an 710077, China)

机构地区：[1]空军工程大学信息与导航学院,陕西西安710077

出　　处：《系统工程与电子技术》2021年第8期2332-2340,共9页Systems Engineering and Electronics

基　　金：国家自然科学基金(61703427)资助课题。

摘　　要：针对基于优先级概率统计的多址接入(statistic priority-based multiple access,SPMA)模式协议在高负载情况下战术信息的碰撞概率十分严重,网络性能无法满足协同攻击要求的问题,本文借鉴非正交多址接入技术在功率域上区分同时同频信号的思想,改进SPMA协议信号发送机制与多优先级检测机制,在原有的时域、频域基础上引入功率域,提出一种联合功率域的SPMA协议性能改进策略。并针对各优先级数据包到达率的动态变化场景,设计动态阈值算法,以达到降低碰撞概率,提升网络吞吐量的目的。仿真结果表明,采用该改进策略与动态阈值算法可以使网络承载更大的业务流量,提高网络吞吐量。Aiming at the problem of statistic priority-based multiple access(SPMA)protocol has a high probability of collision of tactical information under high load,and the network performance cannot meet the requirements of coordinated attack,this paper draws on the application of non-orthogonal multiple access(NOMA)technology on distinguishing simultaneous frequency signals in the power domain.The SPMA protocol signaling mechanism and multiprionity level detection mechanism are improved.The power domain is introduced on the basis of the original time and frequency domain.A joint power domain SPMA protocol performance improvement strategy is proposed,and a dynamic threshold algorithm is designed for the scenario where the arrival rate of each priority packet dynamically changes,in order to reduce the collision probability and improve the network throughput.Simulation results show that the improved strategy and dynamic threshold algorithm can make the network carry more business traffic and improve network throughput.

关 键 词：数据链 非正交多址接入 基于优先级概率统计的多址接入 动态阈值 碰撞概率 

分 类 号：TN92[电子电信—通信与信息系统]