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http://dx.doi.org/10.9708/jksci.2010.15.1.129

A Packet Prioritization Scheme for supporting QoS in Wireless Sensor Networks  

Rhee, Yun-Seok (한국외국어대학교 전자정보공학부)
Publication Information
Journal of the Korea Society of Computer and Information / v.15, no.1, 2010 , pp. 129-137 More about this Journal
Abstract
In this paper, we propose a packet prioritization scheme using preamble signal and backoff time which is designed to provide a differentiated channel occupation with a packet priority in wireless sensor networks. This scheme aims at enabling QoS such as fast delivery of high priority packets by reducing their backoff time as well as thus securing higher channel occupation. We expect that it could also improve the channel utilization of the entire network by avoiding unnecessary channel contention. For the purpose, we add new features of multiple queue and preamble modification to the TinyOS based B-MAC. This scheme achieves 82-88% reduction in delivery time of high priority packets, thus it enables realtime support for urgent applications.
Keywords
sensor network; QoS(Quality of Service); MAC laer; preamble; packet prioritization; B-MAC;
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