Delay-Sensitive And Reliable Multicast Query Protocol in WSN
Date Issued
2008
Date
2008
Author(s)
Yuan, Jia-Bin
Abstract
Sensors are small, low-cost, wireless computing devices that sense information such as light and humidity at extremely high resolutions. Sensor technology has enabled a broad range of ubiquitous computing applications, such as agricultural, industrial, and environmental monitoring. Because sensor network is application-driven, its network protocol stack designs are different form applications to applications. In this paper, we present a reliable, energy-saving and delay-sensitive multicast query and reporting pro-tocol in this proposal. This protocol is especially suitable for applications that periodi-cally query multiple destinations, and collect sensed data from queried sensor nodes in a timely, reliable and energy-efficient way. This protocol contains two major component, efficient multicast query and energy-saving response. For ensuring both transmission reliability and system efficiency, we introduce R-ACK mechanism modified from hop-by-hop ACK into our proposed protocol. The main idea of this protocol design is that each nodes uses Transmission Status Table to record the transmission states of its child-ren nodes toward multicast query destinations. With Transmission Status Table design along with proper retransmission timer design, we can efficiently reduce transmission times to prolong nodes’ life. To achieve real-time delay guarantee, the adjustable re-transmission timer is one essential component in this protocol. For taking advantage of the nature of wireless transmission and conserving energy, promiscuous mode and PS (power saving) mode are introduced into our protocol. We evaluate our design on a 10~20-node sensor network. The results show that our proposed protocol largely in-creases reliability and performs high scalability.
Subjects
wireless sensor network
reliable query
multicast query
Type
thesis
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