Document Type

Conference Proceeding

Publisher

IEEE Press

Faculty

Faculty of Computing, Health and Science

School

School of Engineering / Centre for Communications Engineering Research

RAS ID

6046

Comments

This is an Author's Accepted Manuscript of: Zen, K. , Habibi, D. , & Ahmad, I. (2008). Improving Mobile Sensor Connectivity Time in the IEEE 802.15.4 Networks. Proceedings of Australian Telecommunication Networks and Applications Conference. ATNAC 2008. (pp. 317-320). Adelaide, Australia. IEEE Press. Available here

© 2008 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Abstract

In the IEEE 802.15.4 medium access control (MAC) protocol for wireless sensor networks, a sensor node needs to associate with a coordinator before it starts sending or receiving data. The sensor node will mostly choose the nearest coordinator to associate with. However, this method is not suitable for a constantly moving sensor node because it will end up switching coordinators too often due to short connectivity time. The IEEE 802.15.4 has a simplistic and inadequate method of choosing a coordinator in this context. In this paper, we introduce a method to increase the mobile sensor node connectivity time with its co-ordinator in IEEE 802.15.4 beacon-enabled mode. Our method is based on the timestamp of the beacons received from the nearby coordinators and filtering weak beacon signals. By choosing the coordinator which has sent the most recent received beacon with good signal quality, we increase the moving node connectivity time with the coordinator. Our technique results in significant improvement by reducing the number of times the moving node switches coordinators. This increases the throughput and reduces the wasted power in frequent associations.

DOI

10.1109/ATNAC.2008.4783343

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Link to publisher version (DOI)

10.1109/ATNAC.2008.4783343