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首頁> 外文OA文獻 >Design and analysis of energy-efficient media access control protocols in wireless sensor networks. Design and analysis of MAC layer protocols using low duty cycle technique to improve energy efficient and enhance communication performance in wireless sensor networks.
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Design and analysis of energy-efficient media access control protocols in wireless sensor networks. Design and analysis of MAC layer protocols using low duty cycle technique to improve energy efficient and enhance communication performance in wireless sensor networks.

機譯：無線傳感器網(wǎng)絡中節(jié)能媒體訪問控制協(xié)議的設計和分析。使用低占空比技術(shù)設計和分析MAC層協(xié)議，以提高能源效率并增強無線傳感器網(wǎng)絡中的通信性能。

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摘要

Wireless sensor network (WSN) technology has gained significant importance due to its potential support for a wide range of applications. Most of the WSN applications consist of a large numbers of distributed nodes that work together to achieve common objects. Running a large number of nodes requires an efficient mechanism to bring them all together in order to form a multi-hop wireless network that can accomplish some specific tasks. Even with recent developments made in WSN technology, numbers of important challenges still stand as vulnerabilities for WSNs, including energy waste sources, synchronisation leaks, low network capacity and self-configuration difficulties. However, energy efficiency remains the priority challenging problem due to the scarce energy resources available in sensor nodes. These concerns are managed by medium access control (MAC) layer protocols. MAC protocols designed specifically for WSN have an additional responsibility of managing radio activity to conserve energy in addition to the traditional functions. udThis thesis presents advanced research work carried out in the context of saving energy whilst achieving the desired network performance. Firstly the thesis contributes by proposing Overlapped Schedules for MAC layer, in which the schedules of the neighbour clusters are overlapped by introducing a small shift time between them, aiming to compensate the synchronisation errors. Secondly, this thesis proposed a modified architecture derived from S-MAC protocol which significantly supports higher traffic levels whilst achieving better energy efficiency. This is achieved by applying a parallel transmission concept on the communicating nodes. As a result, the overall efficiency of the channel contention mechanism increases and leads to higher throughput with lower energy consumption. Finally, this thesis proposed the use of the Adaptive scheme on Border Nodes to increase the power efficiency of the system under light traffic load conditions. The scheme focuses on saving energy by forcing the network border nodes to go off when not needed. These three contributions minimise the contention window period whilst maximising the capacity of the available channel, which as a result increase network performance in terms of energy efficiency, throughput and latency. The proposed system is shown to be backwards compatible and able to satisfy both traditional and advanced applications.udThe new MAC protocol has been implemented and evaluated using NS-2 simulator, under different traffic loads and varying duty cycle values. Results have shown that the proposed solutions are able to significantly enhance the performance of WSNs by improving the energy efficiency, increasing the system throughput and reducing the communication delay.
機譯：無線傳感器網(wǎng)絡（WSN）技術(shù)由于其潛在的廣泛應用支持而變得非常重要。大多數(shù)WSN應用程序都由大量分布式節(jié)點組成，這些節(jié)點協(xié)同工作以實現(xiàn)通用對象。運行大量節(jié)點需要一種有效的機制將它們?nèi)拷M合在一起，以形成可以完成某些特定任務的多跳無線網(wǎng)絡。即使隨著WSN技術(shù)的最新發(fā)展，WSN的漏洞仍然面臨許多重要挑戰(zhàn)，包括能源浪費，同步泄漏，網(wǎng)絡容量低和自配置困難。然而，由于傳感器節(jié)點中可用的能源稀缺，能量效率仍然是優(yōu)先考慮的難題。這些問題由媒體訪問控制（MAC）層協(xié)議管理。專為WSN設計的MAC協(xié)議除了傳統(tǒng)功能外，還承擔管理無線電活動以節(jié)省能源的額外責任。 ud本論文介紹了在節(jié)省能源的同時實現(xiàn)所需網(wǎng)絡性能的高級研究工作。首先，論文提出了MAC層的重疊調(diào)度方案，其中相鄰簇的調(diào)度方案之間引入了較小的移位時間，以補償同步誤差，從而實現(xiàn)了重疊。其次，本文提出了一種從S-MAC協(xié)議派生的改進架構(gòu)，該架構(gòu)顯著支持更高的流量級別，同時實現(xiàn)了更高的能源效率。這是通過在通信節(jié)點上應用并行傳輸概念來實現(xiàn)的。結(jié)果，信道爭用機制的整體效率增加并且導致具有較低能量消耗的較高吞吐量。最后，本文提出了在邊界節(jié)點上使用自適應方案來提高輕載條件下系統(tǒng)的功率效率。該方案致力于通過在不需要時強制網(wǎng)絡邊界節(jié)點關(guān)閉來節(jié)省能源。這三個貢獻最小化了競爭窗口周期，同時最大化了可用信道的容量，因此，在能源效率，吞吐量和等待時間方面提高了網(wǎng)絡性能。該提議的系統(tǒng)顯示出向后兼容，并能夠滿足傳統(tǒng)和高級應用程序。 ud已使用NS-2仿真器在不同的流量負載和不同的占空比值下實現(xiàn)并評估了新的MAC協(xié)議。結(jié)果表明，所提出的解決方案能夠通過提高能效，增加系統(tǒng)吞吐量和減少通信延遲來顯著提高WSN的性能。

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  • 作者

    Ammar Ibrahim Ammer Musbah;

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  • 年度 2014
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