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首页> 外文期刊>International journal of adaptive, resilient, and autonomic systems >Caching Based Transport Optimization for Wireless Multimedia Sensor Networks
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Caching Based Transport Optimization for Wireless Multimedia Sensor Networks

机译：基于缓存的无线多媒体传感器网络传输优化

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摘要

Traditional transport layer protocols have been designed to perform end-to-end error control transparently to the intermediate nodes (e.g., TCP). To address the severe resource constraints featured by Wireless Sensor Networks (WSN), new paradigms have been developed such as intermediate caching where intermediate nodes are able to cache packets and if possible retransmit them on-demand to avoid incurring costly end-to-end retransmissions. Lately, Wireless Multimedia Sensor Network (WMSN) has been considered as a new research area whereby WSNs are targeted for the delivery of multimedia traffic. In this paper, we propose a NACK-based repair mechanism coupled with an adaptive MAC layer retransmission scheme in order to improve the performance of caching-based WMSN transport protocols. Specifically, our goal is to be able to reduce real-time end-to-end delay while maintaining reliability and energy efficiency in the presence of high channel error rates. Our simulation results show that the ensemble of both mechanisms provides better good put performance while simultaneously improving energy efficiency. Furthermore, the improved protocol also achieves lower deadline miss ratios making it suitable for multimedia transport. While we demonstrate the effectiveness of the mechanisms by incorporating them into the basic DistributedTransport for Sensor Networks (DTSN) protocol, they are generic enough to be applicable to other WSN and WMSN transport protocols.
机译：传统的传输层协议已被设计为对中间节点（例如，TCP）透明地执行端到端的错误控制。为了解决无线传感器网络（WSN）所面临的严重资源限制，已经开发了新的范例，例如中间缓存，其中中间节点能够缓存数据包，并在可能的情况下按需重新传输它们，以避免产生昂贵的端到端重传。最近，无线多媒体传感器网络（WMSN）被认为是一个新的研究领域，无线传感器网络（WSN）专门用于传递多媒体流量。在本文中，我们提出了一种基于NACK的修复机制，并结合了自适应MAC层重传方案，以提高基于缓存的WMSN传输协议的性能。具体来说，我们的目标是能够在存在高通道错误率的情况下，在保持可靠性和能效的同时减少实时端到端延迟。我们的仿真结果表明，这两种机制的结合提供了更好的良好推杆性能，同时提高了能源效率。此外，改进的协议还实现了较低的截止期限未命中率，使其适用于多媒体传输。虽然我们通过将这些机制合并到传感器网络的基本DistributedTransport（DTSN）协议中展示了这些机制的有效性，但它们的通用性足以适用于其他WSN和WMSN传输协议。

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