D-PRMA:一种新的无线Ad Hoc网络资源预留MAC机制  

D-PRMA: A Novel MAC Mechanism Supporting Resource Reservation for Wireless Ad Hoc Networks

作　　者：李云[1] 隆克平[1] 赵为粮[1] 陈前斌[1] 吴诗其[2] 

机构地区：[1]重庆邮电学院光互联网及无线信息网络研究中心,重庆400065 [2]电子科技大学抗干扰国防重点实验室,成都610054

出　　处：《电子与信息学报》2005年第6期967-972,共6页Journal of Electronics & Information Technology

基　　金：国家863计划(2003AA121540)国家自然科学基金项目(90304004)重庆市教委科学技术研究项目(050310)人事部归国人员择优资助项目联合资助课题

摘　　要：支持资源预留的介质访问控制(MAC)机制是无线ad hoc网络提供服务质量保证的关键。本文在分析分组预留多址接入(PRMA)的基础上,给出了一种新的支持资源预留的无线ad hoc网络MAC机制:分布式PRMA (D-PRMA)。D-PRMA的主要特点是分布式的,这适合无线ad hoc网络无中心的特点,同时,D-PRMA具有很短的碰撞持续时间,支持不同速率的实时业务,避免了对分组的分片和重组。通过仿真,本文进一步分析了D-PRMA 的性能,仿真结果表明D-PRMA能保证实时业务的带宽和时延。The Medium Access Control (MAC) mechanism plays a key role on supporting Quality of Service (QoS) in wireless ad hoc networks. Based on the analysis to Packet Reservation Multiple Access (PRMA), this paper gives a new MAC scheme, Distributed- PRMA (D-PRMA), which can reserve bandwidth for real-time services. D-PRMA is distributed, which is required for wireless ad hoc networks. At the same time, D-PRMA supports real-time services whose rates are different, avoids the fragment and reassembly of packets, and makes the collision duration short-lived. By simulation, the performance of D-PRMA is evaluated. The simulation results prove that D-PRMA can guarantee the bandwidth and delay of the real-time services.

关 键 词：无线AD hoe网络 介质访问控制 服务质量 资源预留 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]