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It's important in a Zigbee networking, how the Zigbee devices are communicate with each other in the network. In IEEE802.4 standard define three way to communicating the Zigbee devices with each other which are known as network topologies. The network topologies that define in this standard are star, Mesh and Tree topology. This paper focus on the performance of the Zigbee topologies depending on the measuring of the throughput, delay and the number of packets send and received. Many scenarios have been created in Opnet modeler simulation program to study the performance of the three network topologies (star, Mesh, and Tree). Finally to take the effect of activation of ACK mechanism in consideration, duplicate scenario for each network topology was configured with same network configuration and activation the ACK mechanism.

Effect of ACK on the Performance of Zigbee Topologies