Mobile Information Systems - Advances in Wireless Networks
Dynamic reconfiguration in beaconless IEEE 802.15.4 networks under varying traffic loads
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
QoS-aware MAC protocols for wireless sensor networks: A survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
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In wireless sensor network, IEEE 802.15.4 should operate in beacon-enabled mode in order to schedule periodic sleep and wake up to minimize energy con- sumption. In beacon enabled mode QoS is supported by using Guaranteed Time Slots(GTS). However max- imum number of GTS node cannot exceed seven, and the number is not sufficient for wireless sensor network which have high node density. In this paper, we present QoS support mechanism in beacon enabled mode using CSMA/CA back-off time. Our algorithm have compat- ibility with IEEE 802.15.4 Standard, which means that there is no need to change hardware to support QoS on existing network. We will analysis the performance of our algorithm to design QoS parameters.