基于包的细粒度信道接入机制改进  

Packet-based fine-grained channel access mechanism improvements

作　　者：包叶锦 雷琪琦 BAO Ye-jin;LEI Qi-qi(School of Information and Communication Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学信息与通信工程学院,哈尔滨150001

出　　处：《哈尔滨商业大学学报（自然科学版）》2022年第6期705-713,共9页Journal of Harbin University of Commerce：Natural Sciences Edition

摘　　要：为了解决大规模Ad Hoc战术通信网络由于拓扑结构变化剧烈、节点移动速度迅速带来的包与包之间的冲突碰撞问题,对基于优先级概率统计的媒体访问控制协议(Statistic Priority based Multi Access,SPMA)的退避机制进行深入研究,提出一种结合MAC层的细粒度信道接入机制,该机制在信道负载统计以及接入机制这两方面提出了改进,该协议改变了传统的在物理层上统计信道负载的方式,并将控制信道负载的单位细粒度化.借助OMNeT++仿真软件对该模型进行系统仿真.仿真结果表明,改进后的信道接入机制能够使得整个网络的退避过程能够保持更高的信道利用率,有助于提升整个网络的吞吐量.In order to solve the problem of collision between packets and packets caused by the rapid change of topology and rapid node movement speed of large-scale Ad Hoc tactical communication network,the backoff mechanism of Statistic Priority Priority based Multi Access(SPMA)based on priority probability and statistics was studied in depth,and a fine-grained channel access mechanism combined with the MAC layer was proposed.This mechanism proposed improvements in both channel load statistics and access mechanisms,which changes the traditional way of counting channel loads at the physical layer and fine-grained the units that control channel loads.With the help of OMNeT++simulation software,the simulation results showed that the improved channel access mechanism can maintain higher channel utilization during the backoff process of the whole network,which helps to improve the throughput of the entire network.

关 键 词：Ad Hoc战术通信网络 信道负载控制 信道接入机制 退避单位 细粒度 吞吐量 

分 类 号：TN918[电子电信—通信与信息系统]