Abstract
The IEEE 802.15.4 is a new wireless personal area network standard designed for wireless monitoring and control applications. In this paper a study of the backoff exponent (BE) management in CSMA–CA for 802.15.4 is conducted. The BEs determine the number of backoff periods the device shall wait before accessing the channel. The power consumption requirements make CSMA–CA use fewer Bes which increase the probability of devices choosing identical Bes and as a result wait for the same number of backoff periods in some cases. This inefficiency degrades system performance at congestion scenarios, by bringing in more collisions. Thispaper addresses the problem by proposing an efficient management of Bes based on a decision criterion. As a result of the implementation potential packet collisions with other devices are restricted. The results of NS-2 simulations indicate an overall improvement in effective data bandwidth, validating our claim.
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© 2006 Springer-Verlag Berlin Heidelberg
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Rao, V.P., Marandin, D. (2006). Adaptive Backoff Exponent Algorithm for Zigbee (IEEE 802.15.4). In: Koucheryavy, Y., Harju, J., Iversen, V.B. (eds) Next Generation Teletraffic and Wired/Wireless Advanced Networking. NEW2AN 2006. Lecture Notes in Computer Science, vol 4003. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11759355_46
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DOI: https://doi.org/10.1007/11759355_46
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-34429-2
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