Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/15458
Title: A prioritized MAC protocol for multihop, event-driven wireless sensor network
Authors: NGUYEN TRUNG KIEN
Keywords: wireless sensor network, medium access control, quality of service, packet priority, report suppression, event-driven
Issue Date: 2-Aug-2006
Source: NGUYEN TRUNG KIEN (2006-08-02). A prioritized MAC protocol for multihop, event-driven wireless sensor network. ScholarBank@NUS Repository.
Abstract: This thesis presents a new Prioritized MAC protocol (PSIFT) that improves the performance of event-driven wireless sensor networks by suppressing the redundant reports of sensor nodes in proximity. This suppression of similar reports results in low collision probability, shorter delay and accurate detection of events by the sink. PSIFT is a CSMA-based MAC protocol that provides traffic differentiation by varying the inter frame space and contention window size for each traffic class. We also introduce the new report suppression mechanism based on the broadcast nature of wireless transmission in PSIFT. This mechanism works very efficiently in large-scale, event-driven wireless sensor networks. Simulation results show that the new PSIFT MAC protocol can bring significant improvement in delay performance of the networks. When the sensing range grows up to transmission range, PSIFT can reduce the latency as much as three times in delivering reports as compared to the existing IEEE802.11 MAC protocol.
URI: http://scholarbank.nus.edu.sg/handle/10635/15458
Appears in Collections:Master's Theses (Open)

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