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Báo cáo hóa học: " Research Article A Study on Event-Driven TDMA Protocol for Wireless Sensor Networks"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: IResearch Article A Study on Event-Driven TDMA Protocol for Wireless Sensor Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2010 Article ID 169132 12 pages doi 10.1155 2010 169132 Research Article A Study on Event-Driven TDMA Protocol for Wireless Sensor Networks Haigang Gong 1 Ming Liu 1 Guihai Chen 2 and Xue Zhang1 1 School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu 6 10054 China 2 Deparment of Computer Science and Engineering Shanghai Jiaotong University Shanghai 200242 China Correspondence should be addressed to Haigang Gong hggong@uestc.edu.cn Received 14 February 2010 Accepted 3 November 2010 Academic Editor Xiang-Yang Li Copyright 2010 Haigang Gong et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. MAC protocol controls the activity of wireless radio of sensor nodes directly so that it is the major consumer of sensor energy and the energy efficiency of MAC protocol makes a strong impact on the network performance. TDMA-based MAC protocol is inherently collision-free and can rule out idle listening since nodes know when to transmit. However conventional TDMA protocol is not suitable for event-driven applications. In this paper we present ED-TDMA an event-driven TDMA protocol for wireless sensor networks. Then we conduct extensive simulations to compare it with other MAC protocols such as BMA S-MAC and LMAC. Simulation results showthat ED-TDMA performs better for event-driven application in wireless sensor networks with high-density deployment and under low traffic. 1. Introduction Like in all other shared-medium networks medium access control MAC is also a key component to ensure the successful operation of wireless sensor networks. A MAC protocol decides when competing nodes could access the shared medium and tries to ensure that no collisions occur while nodes .