Modeling and Simulation of CSMA/CA Slotted and Unslotted Mode in Zigbee Routing Schemes

Abstract

Zigbee is basically a self organizing digital radio network. It is based on IEEE 802.15.4 standard used for Wireless Sensor Network. This research work is related to CSMA/CA slotted and unslotted mode on IEEE 802.15.4 based wireless sensor network using three routing schemes. The simulation model is done by using OPNET 14.5. Performances metrics like throughput, data traffic sent and received, packet dropped in the network are determined and analyzed. The results show that the star topology in beacon enable mode give better result than the non beacon mode and overall performance is superior then other topologies.

Investigation and Performance Analysis of Some Implemented Features of the ZigBee Protocol and IEEE 802.15.4 Mac Specification

“…However, in this situation suitable methods are applicable for transmission. One method is mutual synchronization technique and the other one is direct transmission using un-slotted CSMA-CA [22]. But both techniques have drawbacks.…”

“…It is also known as a Reduced Functional Device (RFD) [22]. It is possible because when they are not active, they can go to sleep mode.…”

“…ZigBee Coordinator: The heart of a network which is the coordinator is also the node which initializes the network, selects the proper channel and gives permission to other devices to connect with its network [22]. It can also responsible for routing traffic and suggest which routing technique should be used to transfer data into different nodes.…”

“…ZigBee Router: Router is a fully functional device that supports data routing functionality and works as an intermediate device to add with different components of the network and forwards messages between remote devices and multi hop paths [22]. A router can establish communication with other routers and end device.…”