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引用次数: 6
摘要
IEEE 802.11无线局域网越来越多地应用于对链路速率和传输延迟性能要求非常严格的多媒体业务。在本文中，作者将研究链路适应要求，以允许所要求的基于多媒体质量的通信。速率控制图的效率与快速信道变化响应有关。提出了一种新的基于时间的动态链路自适应机制MAARF (modified adaptive auto rate fallback)。除了传输帧结果外，新模型还实现了往返时间(RTT)机制，以选择适当的瞬时链路速率。采用自适应ARF (ARF)和自适应ARF (ARF)两种方案对该模型进行了评价。仿真结果说明了Wi-Fi网络传输链路质量的提高。
A New Link Adaptation Scheme for IEEE 802.11 WLANs
The IEEE 802.11 WLAN becomes more applied for multimedia traffics that are very strict in terms of link rate and transmission delay performance. In this paper, the authors will study link adaptation requirements to allow the requested multimedia quality-based communications. The efficiency of rate control diagrams is linked to the fast channel variation response. A new dynamic time-based link adaptation mechanism, called MAARF (modified adaptive auto rate fallback), is proposed. Beside the transmission frame results, the new model implements round trip time (RTT) mechanism to choose adequately instantaneous link rate. This proposed model is evaluated with ARF (auto rate fallback) and AARF (adaptive ARF) schemes. Simulation results are given to illustrate the quality improvement of transmission link over Wi-Fi networks.
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