Average end-to-end delay of customised ZigBee stack

Abstract

Zigbee protocol supports long range and reliable communication with reasonable data rates suitable for WPAN communication and hence it is chosen for experimentation in the proposed work. But unfortunately, Different devices of a WPAN may use different types of protocols, the zigbee protocol may not be adequate to control all the devices of WPAN. There are different protocols for realising WPAN. It is chosen to modify ZigBee stack in order to incorporate the features of common communication protocol so as to enable the consumer electronics share resources and communicate among themselves leading to a virtual control network. As the internet is most commonly used communication network in the user community, the protocols of internet are studied to find the suitability in channel access and routing strategies in order to implement these protocols in the customised ZigBee stack. After a thorough research ZigBee stack is modified with appropriate protocols at respective layers with the addition of a new layer i.e. adaptation layer between network and application layers. The design of this middleware is presented and the results are published [21]. This work presents the mathematical modelling of the average end-to-end delay of modified ZigBee stack, christened ZI stack. Both the stacks viz., ZI and ZigBee are also compared w.r.t average end-to-end delay.