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Contention/Collision Mitigation Scheme in IEEE 802.15.4 Mesh Sensor Networks
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 Title & Authors
Contention/Collision Mitigation Scheme in IEEE 802.15.4 Mesh Sensor Networks
Lee, Hyo Ryun; Jung, Kyoung-Hak; Suh, Young-Joo;
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This paper address a new scheme that alleviates the packet collision problem caused by contentions among nearby coordinators (CNs) in IEEE 802.15.4 meshed sensor networks. In existing studies, the number of retransmissions is reduced by adjusting the proper backoff period (BP) of sensor nodes, or unnecessary energy consumption is diminished by increasing channel utilization efficiently based on traffic load. In contrast, the proposed scheme avoids contentions among nearby CNs, thereby it enhances the energy efficiency of sensor nodes. To achieve this, the proposed scheme separates the starting points of CNs' contention periods and reduces contentions and collisions among overlapping CNs. According to our simulation results, the proposed scheme shows improved performance in terms of energy consumption, throughput, the number of collisions, and average delay for all conditions.
IEEE 802.15.4;Contention;Collision;Energy;ZigBee;
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