The mobile ad hoc network is self-configurable network technology where not any fixed infrastructure is available. Due to frequent mobility and dynamic topology the network suffers from the frequent path breaks and the connectivity issues. The clustering techniques are utilized to improve the connectivity and scalability of network. Therefore a new weight based clustering algorithm is developed using the remain energy, signal to noise ratio, mobility and connectivity for better performance in a cluster. The implementation and the comparative performance study are performed in network simulator 2 platforms. The performance studies of the technique are given in terms of packet delivery ratio, remaining energy, end to end delay, throughput and overhead in network. The obtained results demonstrate the proposed technique improves the reliability of cluster.

The application of WSN/ZigBee is having enormous growth and how to connect WSN/ZigBee to the present standard network seamlessly is an issue what is worth studying. In this paper, it patters and realizes a ZigBee-Wi-Fi wireless pathway based on STM32W108 RF chip and embedded Wi-Fi module. In ZigBee network, wireless pathway as a sink, it receives information from sensor nodes and interacts with them. In WLAN, wireless pathway communicates with PC or network servers by means of AP. Both the hardware scheme and software scheme of the wireless gateway are introduced. Then the performance of the wireless pathway is tested, and the result shows that it can be used for general purposes and the performance is stable. The wireless pathway can realize communication effectively between ZigBee network and WLAN.