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http://dx.doi.org/10.6109/jkiice.2007.11.8.1493

A Scheme to Reduce the Transmission Delay for Real-Time Applications in Sensor Networks  

Bin, Bong-Uk (인제대학교)
Lee, Jong-Hyup (인제대학교)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.11, no.8, 2007 , pp. 1493-1499 More about this Journal
Abstract
Real-time applications in a wireless sensor network environment require real-time transmissions from sensing nodes to sink nodes. Existing congestion control mechanisms have treated congestion problems in sensor networks, but they only adjust the reporting frequency or the sending rate in intermediate nodes. They were not suitable for real-time applications from the transmission delays point of view. In this paper, we suggest a new mechanism that can reduce the transmission delay and can increase the throughput for real-time applications in sensor network. This mechanism classifies data on the real-time characteristics, processes the data maintaining the real-time characteristics prior to the other data such as the non real-time data or the data lost the real-time characteristics. A modified frame format is also proposed in order to apply the mechanism to IEEE 802.15.4 MAC layer. The simulation based on ns-2 is accomplished in order to verify the performance of the suggested scheme from transmission delay and throughput standpoints. The simulation results show that the proposed algorithm has a better performance specifically when It applies to the real-time applications in sensor networks.
Keywords
Sensor Networks; 802.15.4a; LR-WPAN; MAC; Real-Time;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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