In multi hop wireless systems, such as wireless sensor networks, mobile ad hoc network, security is an important factor. It becomes more critical issue when we transmit important data between nodes. There are a lot of attacks available in wireless sensor network or mobile ad hoc network. In our paper we are going to discuss about a particularly devastating attack, known as the wormhole attack. ...

A wireless sensor network (WSN) is composed of many nodes with limited power supply; most nodes are stationary in the network which could probably involve a few mobile nodes. Various medium access control (MAC) protocols specially aimed at a target locating application for WSNs have been proposed. However, most of these protocols based on the problem of energy-limited does not consider the mobi...

In past few years, a remarkable change has been faced in the field of wireless sensor network – mobile sensor nodes. Congestion in the network and limited energy causes delay in the network. Due to this very reason, it has been now an obligatory to ensure the appropriate use of the given resources. Saving the battery life, sagacitic time allocation, minimizing the communication delay, effective...

Under many research and development cell it has been noted that establishing the wireless sensor nodes network and let them work as a cluster, but the major problem with wireless sensor nodes cluster is monitoring of cluster head through wireless technology has limitation of range. Using existing mobile network one can achieve the task but again it has a limitation over world wide access and su...