Search

Wireless sensor network (WSN) is a network communication technology that is characterized by its small size; low power consumption and limited memory capacity. It provides communication in a broadcast manner. These sensor nodes have no specific infrastructure and they are placed randomly throughout the network. The use of WSNs is to collect data from physical environment and in real time. Error in the collected data or malfunctioning of the sensors can create problems on large scale. There are few ways and methods through which WSNs can be attacked. One of them is the Denial of Service Attack (DoS), which captures the nodes and takes its important data, modifies it or halt it from responding to a bona fide user. Various techniques are used to tackle DoS attack on WSNS. By using the multiple base station approach we can reduce and minimize the drastic effect of DoS attack on WSNs and makes our network secure and functioning in its normal conditions

Mobile ad-hoc networks (MANETs) are temporary networks without any pre-existing infrastructure in which nodes are connected through wireless channels. There is no centralized administration in this network because nodes are not fixed at their locations, they are continuously moving to different locations. Each node in MANETs has dynamic capabilities because at one point acts as a host while in some other time becomes a router which can forward messages on the network to other nodes. One of the complicated issues in MANETs is routing due to their dynamic topology which is frequently changes due to the mobility of nodes. In order to forward packets in this complex topology using optimal routes, there is a need for efficient routing protocols. There are three categories of routing protocols in MANETs named as reactive, proactive and hybrid respectively. We have used a hybrid type protocol named Zone Routing Protocol (ZRP) for routing in our research. In order to control unwanted flooding in the overlapping zones of ZRP, we have proposed a selective broadcasting technique for route discovery. In this technique route discovery exchange messages are highly reduced in the outer zone of the ZRP.