一种QoS保证的多跳动态资源分配协议  

Multi-hop Dynamic Resource Allocation Protocol with Guaranteed QoS

作　　者：张华伟 谢东风 邹艳芳 胡永辉 ZHANG Hua-wei;XIE Dong-feng;ZOU Yan-fang;HU Yong-hui(The Military Representative Office of the Military Representative Bureau of Equipment Development of the Center Military Commission in Tanjin,Tianjin 300100,China;Tianjin 712 Communication Broadcasting Company,Tianjin 300100,China)

机构地区：[1]中央军委装备发展部军事代表局驻天津地区军事代表室,天津300100 [2]天津七一二通信广播股份有限公司,天津300100

出　　处：《计算机科学》2020年第S02期310-315,共6页Computer Science

摘　　要：针对Ad Hoc网络无中心、拓扑易变、多跳节点共享信道资、业务多样的特点,提出了一种QoS保证的多跳动态资源分配协议。设计帧结构包括引导时隙、广播/预留时隙、竞争时隙3个部分,同时满足多节点公平接入及实时业务的时延要求;采用三跳防冲突方法复用信道资源,提高资源利用率,降低接收端的噪声门限,最小化冲突的可能性;根据QoS需求抢占空闲广播/预留时隙,抢占标准包括业务优先级、时隙空闲概率以及空闲时隙连续概率;分别对引导时隙、广播/预留时隙、竞争时隙的时隙收敛过程进行说明。通过MATLAB仿真可知,提出的QoS保证的多跳动态资源分配协议可以提高数据传输的网络分组成功投递率,降低平均时延,且更适合负载较大、节点数量较多的网络。According to the characteristics of having no center,changeable network topology,multi-hop nodes sharing channel resources,and diverse service of Ad Hoc,a multi-hop dynamic resource allocation protocol with guaranteed QoS is proposed.The design frame structure is consisted of three parts:bootstrap timeslots,broadcast/standby timeslots and contention timeslots.Meanwhile,the structure could achieve fair access of multi-node as well as meet the requirements of real-time service delay by taking following methods:using three-hop conflict prevention method to reuse channel resources,reduce the noise threshold at the receiving node to minimize the possibility of conflicts;preempting idle broadcasts or reserved slots according to QoS requirements and preemption criteria which is composed of operation priorities,probability of slot free as well as continuous probability of free time slots;describing the convergence process of bootstrap timeslots,broadcast/standby timeslots and contention timeslots respectively.Based on MATLAB visible simulation results,it can be concluded that the proposed resource allocation method can improve the network packet delivery fraction,reduce the average delay.Furthermore,this method is more suitable for networks with heavy loads and large number of nodes.

关 键 词：Ad Hoc QOS 资源多跳复用 动态资源分配 分组投递率 时延 

分 类 号：TN929[电子电信—通信与信息系统]