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Implementation of a TDMA-based Bidirectional Linear Wireless Sensor Network  

Lee, Hyung-Bong (강릉대학교 컴퓨터공학과)
Park, Lae-Jeong (강릉대학교 전자공학과)
Moon, Jung-Ho (강릉대학교 전자공학과)
Chung, Tae-Yun (강릉대학교 전자공학과)
Publication Information
Journal of KIISE:Computing Practices and Letters / v.14, no.4, 2008 , pp. 341-351 More about this Journal
Abstract
Communication in wireless sensor networks comprising a plurality of sensor nodes located in an ad hoc environment is unidirectional in that data gathered by sensor nodes are transmitted to a sink node and not vice versa. In those networks, it is not possible for a server or a gateway to send commands to the sensor nodes to determine whether some previously received data are valid when the data indicate unusual conditions, which makes it difficult to make appropriate reactions to the unusual situations. This paper proposes and implements a TDMA-based sensor network communication protocol named BiWSLP(Bidirectional Wireless Sensor Line Protocol) supporting bidirectional communication capability. The BiWSLP is an extension of the WSLP, a unidirectional sensor network communication protocol based on the TDMA protocol. To test the feasibility of the proposed BiWSLP, we construct a virtual bridge management system capable of sending commands to sensor nodes as well as collecting data from the sensor nodes. Based on the test results of the virtual bridge management system, we show the applicability and advantages of the BiWSLP in terms of energy efficiency and bidirectional communication capability.
Keywords
S-MAC; T-MAC; B-MAC; TDMA; WSLP; Bidirectional WSLP(BiWSLP);
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