摘要:
支持資源預留的介質訪問控制(MAC)機制是無線ad hoc網(wǎng)絡提供服務質量保證的關鍵.本文在分析分組預留多址接入(PRMA)的基礎上,給出了一種新的支持資源預留的無線ad hoc網(wǎng)絡MAC機制:分布式PRMA(D-PRMA).D-PRMA的主要特點是分布式的,這適合無線ad hoc網(wǎng)絡無中心的特點,同時,D-PRMA具有很短的碰撞持續(xù)時間,支持不同速率的實時業(yè)務,避免了對分組的分片和重組.通過仿真,本文進一步分析了D-PRMA的性能,仿真結果表明D-PRMA能保證實時業(yè)務的帶寬和時延.
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.
下載:
