Ad Hoc网络中一种高效的接纳控制算法  

High-efficient Admission Control in Ad hoc Networks

作　　者：刘少阳[1] 赵海涛[1] 宋安[1] 王杉[1] 魏急波[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院,湖南长沙410073

出　　处：《信号处理》2011年第10期1625-1630,共6页Journal of Signal Processing

基　　金：国家自然科学基金(61002032);教育部博士点基金资助项目(20094307110004)

摘　　要：提出了一种保证Ad hoc网络中实时多媒体业务服务质量(QoS)的高效接纳控制方案。该机制采用跨层设计思想,以网络中每个节点MAC层感知的信息为基本依据,在新业务申请进入网络时在路由层发起接纳判决过程,在保证已有业务QoS不受损害的同时,新业务的QoS要求能够得到满足时才允许接入。该接纳过程具有以下特点:首先,它由目的节点发起反向逐跳进行,相对于以往由源节点发起的接纳控制过程可以节省一半的控制负载;其次,在每跳节点进行接纳判决的同时,对带宽进行暂时预留以防止过度接纳和过度预留情况的发生。分析和仿真证明了该机制能很好的保证实时业务的吞吐量,端到端延迟和延迟抖动等QoS参数,并且跟现有机制相比具有控制负载小,带宽利用率高的特点。An admission control scheme is proposed to guarantee the quality of service（QoS） for real-time multimedia applications in Ad hoc networks.This scheme is based on cross-layer design,which mainly includes a destination-originated process on routing layer to admit or deny a coming flow based on the information sensed in MAC layer.The admission process operates only after the flow＇s request to enter the network,and comparing to the traditional source-originated admission control process,the proposed scheme will bring less control overhead.The second feature of the proposed scheme is that it also adopts a temporary bandwidth reservation to prevent both over-admission and over-reservation.With very low control overhead,the scheme can guarantee the throughput,end-to-end delay and delay violation of the real-time traffics,which is proved by the analysis and simulation.It is also showed that the scheme can evidently improve the channel utilization compared with ASAP.

关 键 词：AD HOC网络 服务质量 接纳控制 跨层设计 

分 类 号：TN915.04[电子电信—通信与信息系统]