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首页> 外文会议>2015 International Conference on Energy Systems and Applications >Enhancing the performance of Wireless Mesh Network (WMN) for video transmission in context with IEEE 802.11
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Enhancing the performance of Wireless Mesh Network (WMN) for video transmission in context with IEEE 802.11

机译：在IEEE 802.11的背景下提高无线网状网络（WMN）的视频传输性能

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摘要

In recent years, multimedia streaming has increased dramatically in wireless networks. Transmission of streaming video over Wireless Mesh Networks (WMNs) faces some challenges such as bandwidth guarantee. The packet loss and delay increases due to high data rate flow over a shared medium in a multi-hop manner. Real-time live surveillance applications usually use Forward Error Control (FEC) technique for reliable transmission of video signals. Sending the video over WMN causes degradation in Quality of Service (QoS) parameters such as Packet Delivery Ratio (PDR), end-to-end delay, throughput, which determine the quality of delivered video. This paper proposes an improved Medium Access Control (MAC) based on medium reservations called Enhanced Mesh Deterministic Access (EMDA). It is a per-node reservation of a block of contiguous transmission opportunities. EMDA significantly improves the optional MDA MAC to provide a much higher video call capacity and much less MDA signalling overhead. Extensive simulations are carried out with the proposed scheme using Network Simulator 2 (NS-2). The results of simulation demonstrate that the proposed scheme significantly improves the end-to-end delay performance of real-time traffic, Packet Delivery Ratio (PDR), jitter and system throughput, as compared with Delivery Traffic Indication Message (DTIM) scheme.
机译：近年来，无线网络中的多媒体流已大大增加。通过无线网状网络（WMN）传输流视频面临一些挑战，例如带宽保证。由于高数据速率以多跳方式流经共享介质，因此丢包和延迟增加。实时实时监视应用程序通常使用前向错误控制（FEC）技术来可靠地传输视频信号。通过WMN发送视频会导致服务质量（QoS）参数（如数据包传输率（PDR），端到端延迟，吞吐量）下降，这些参数决定了所交付视频的质量。本文提出了一种基于媒体保留的改进的媒体访问控制（MAC），称为增强网格确定性访问（EMDA）。它是每个连续传输机会块的每个节点的保留。 EMDA显着改进了可选的MDA MAC，以提供更高的视频呼叫容量和更少的MDA信令开销。使用网络模拟器2（NS-2），以建议的方案进行了广泛的模拟。仿真结果表明，与传递流量指示消息（DTIM）方案相比，该方案显着提高了实时流量，分组传递比（PDR），抖动和系统吞吐量的端到端延迟性能。

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