A Delay-Aware Congestion Control Protocol for Wireless Sensor Networks |
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Authors: | PEI Tingrui LEI Fangqing LI Zhetao ZHU Gengming PENG Xin Youngjune CHOI Hiroo SEKIYA |
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Affiliation: | 1. The College of Information Engineering, Xiangtan University, Xiangtan 411105, China;Key Laboratory of Intelligent Computing & Information Processing of Ministry of Education, Xiangtan University, Xiangtan 411105, China;2. School of Computer Science & Engineering, Hunan University of Science and Technology, Xiangtan 411201, China;3. College of Information and Communication Engineering, Hunan Institute of Science and Technology, Yueyang 414000, China;4. Department of Information and Computer Engineering, Ajou University, Suwon 443749, Korea;5. Graduate School of Engineering, Chiba University, Chiba 263-8522, Japan |
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Abstract: | In wireless sensor networks, congestion leads to buffer overflowing, and increases delay. The tradi-tional solutions use rate adjustment to mitigate congestion, thus increasing the delay. A Delay-aware congestion con-trol protocol (DACC) was presented to mitigate congestion and decrease delay. In order to improve the accuracy of the existing congestion detection model which is based on the buffer occupancy of a single node, DACC presents a new model considering both the real-time buffer occupancy and the average transmission time of packets. DACC uses the untapped bits in the IEEE 802.11 Distributed coordination function (DCF) frames header to carry congestion infor-mation. During the congestion alleviation period, DACC presents a channel occupancy mechanism which is based on the real-time buffer occupancy for the purpose of decreas-ing delay and preventing packet loss. Simulation results indicate that in terms of delay, packet delivery ratio, col-lision and buffer load, DACC has comparative advantages than those of 802.11 DCF, Priority-based congestion con-trol protocol (PCCP) and Decoupling congestion control and fairness (DCCF). |
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Keywords: | Wireless sensor network Congestion con-trol Delay Medium access control (MAC) protocol |
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