The real application in wireless Sensor network (WSN) requires connectivity between nodes to transmit the collected data to a sink node. The primary design goal of low rate wireless mesh personal area networks (LR-WMPANs) is low cost, low power consumption and support of simple devices such as sensors and actuators. Zigbee is a standard for wireless personal area network (WPAN) based on IEEE 802.15.4. It is a new standard uniquely designed for low rate wireless personal area networks. The main research objectives of this paper are to evaluate the adequateness of the IEEE 802.15.4 protocols for supporting WSN applications and the identification of open issues in the standard specifications. Zigbee uses Ad-hoc On-demand Distance Vector (AODV) as a routing protocol.  Finally, this paper presents a performance of the Ad-hoc On-demand Multipath Distance Vector (AOMDV) as a routing protocol, comparing experimental and simulation results. Performance comparison of AOMDV with AODV using ns-2 simulations shows that AOMDV is able to effectively cope with mobility-induced route failures.