Multiple Cluster Tree Routing and Scheduling for Collision Avoidance in 802.15.4. Sensor Networks

Santhi, S.; Venkatachalapathy, K.

doi:10.19026/rjaset.7.645

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2015

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“…To avoid such inter-cluster collisions, many beacon scheduling algorithms have been proposed [4]- [6], [8]- [10]. The previous works solved this inter-cluster collision problem by serializing all beacon frames, not allowing overlaps of beacon frames among clusters.…”

Section: Introductionmentioning

confidence: 99%

Utilization-Aware Hybrid Beacon Scheduling in Cluster-Tree ZigBee Networks

Han

Lee

et al. 2015

IEICE Trans. Inf. & Syst.

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SUMMARYIn this paper, we propose an utilization-aware hybrid beacon scheduling method for a large-scale IEEE 802.15.4 cluster-tree ZigBee network. The proposed method aims to enhance schedulability of a target network by better utilizing transmission medium, while avoiding inter-cluster collisions at the same time. To achieve this goal, the proposed scheduling method partially allows beacon overlaps, if appropriate. In particular, this paper answers for the following questions: 1) on which condition clusters can send overlapped beacons, 2) how to select clusters to overlap with minimizing utilization, and 3) how to adjust beacon parameters for grouped clusters. Also, we quantitatively evaluate the proposed method compared to previous works-i.e., non-beacon scheduling and a serialized beacon scheduling algorithm-from several aspects including total duty cycles, packet drop rate, and end-to-end delay.

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