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Improved Tree Routing (ImpTR) Protocol for ZigBee Network


M. Al-Harbawi, M. F. A. Rasid, N. K. Noordin


Vol. 9  No. 10  pp. 146-152


Many application scenarios in wireless sensor network (WSN) require connectivity between nodes to transmit the collected data to a sink node. ZigBee is a standard for wireless personal area network (WPAN) based on IEEE 802.15.4. It has been developed for low cost, low data rate and low power consumption. ZigBee uses Ad-Hoc On-demand Distance Vector (AODV) and Tree Routing (TR) as a routing protocol. In TR protocol, the packets follow the tree topology for forwarding the data to the sink node even if the sink node is located near to the source node. In this paper, we present an enhancement of the TR protocol called Improved Tree Routing (ImpTR) protocol. The new ImpTR protocol determines the shortest path to the sink node depending on the neighbor table instead of following the tree topology. The packets are forwarded to the neighbor node if the path to the destination through neighbor node is shorter than the path through PAN coordinator. Results show that the proposed algorithm provides shorter average end-to-end delay, increase throughput and decrease the energy consumption from the network when compared to the original TR routing protocol.


IEEE 802.15.4, ZigBee, Neighbors-Table, Tree Routing, NS-2