无线Ad hoc多媒体网络中的可用带宽估计  

Estimation of Available Bandwidth in Wireless Ad Hoc Multimedia Networks

作　　者：王岩[1] 张连芳[1] 窦志斌[1] 

机构地区：[1]天津大学计算机科学与技术学院,天津300072

出　　处：《计算机工程与应用》2006年第33期107-110,共4页Computer Engineering and Applications

基　　金：国家自然科学基金资助项目(90104015);天津市自然科学基金(043600311);中兴通讯"无线Adhoc网络多媒体传输预研项目"

摘　　要：在无线Ahhoc网络上传输具有较高性能要求的多媒体业务,需要为这种网络安装某种QoS路由和准入控制机制。而路径可用带宽计算是任何QoS路由算法的核心部分。802.11无线通道是一类基于CSMA机制的传输介质,建立在802.11MAC层上的多跳Adhoc网络存在流内和流间干扰,所以其可用带宽估计需要特别地加以设计。借鉴[2]的基本思想,根据真实试验,论文对[2]中仿真验证的算法做了一些修正,给出了一个简单、实际可行的可用带宽计算方法,并在DSR试验床上进行了验证。Transmission of multimedia traffic with high performance requirement over wireless Ad hoc network needs to deploy some QoS routing admission control mechanisms in this kind of networks.The computation of path available bandwidth is core component of any QoS routing algorithm.Because 802.11 is a kind of CSMA based transmission media,there exists intra-flow and inter-flow interferences in multi-hop Ad hoc networks,buih on 802.11;and estimation of available bandwidth in these kinds of networks must be specially designed.Based on idea of [2],which has been validated by simulation,and according to our real experiments,a modification of algorithm in [2],and a simple and practically feasible algorithm is also given in this paper,and validated by experiments in our DSR test-bed.

关 键 词：无线AD HOC网络 路径可用带宽 DSR 试验床 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]