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.
Abstract:
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.
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