Mobile multi-hop ad-hoc networks promise an efficient and very flexible way of establishing a communication connection. One aspect of these kind of networks is their convenience, which is sometimes neglected in research. Especially for civil applications, this aspect of ad-hoc networks need more attention. It is expected that users neither need to know much of networks nor perform complex confi...

Ad-hoc networking capabilities have provided the flexibility needed to construct various types of networks without infrastructure base stations. Emerging products for sensor networks, such as Zigbee (1), use ad-hoc networking capabilities to construct networks. These sensor nodes can construct the network such as in outdoor fields and inside buildings without much effort on establishing the bas...

A mobile ad-hoc network (MANET), a set of wirelessly connected sensor nodes, is a dynamic system that executes hop-by-hop routing independently with no external help of any infrastructure. Proper selection of cluster heads can increase the life time of the Ad-hoc network by decreasing the energy consumption. Although different methods have been successfully proposed by researchers to tackle...

Effective Mobile Ad hoc Networks (MANETs) require QoS capabilities that provide the fault tolerance and fast recovery mechanism when there is a link failure.since MANET is a dynamic topology in nature,the protocols used in multi-hop networks maintain the routing stability. In this paper,an efficient call admission control scheme is used to maintain the flows in the network,The consumption of ba...

Mobile Ad hoc Networks (MANETs) are prone to a variety of attacks due to their unique characteristics such as dynamic topology, open wireless medium, absence of infrastructure, multi hop nature and resource constraints. Any node in mobile ad hoc networks operates not only as end terminal but both as an intermediate router and client. In this way, multi-hop communication occurs in MANETs and thu...

Understanding the factors that affect the path connection availability in multi-hop ad hoc networks can help to understand the path stability under various degrees of system dynamics. In addition, the connection availability of paths can be used as a global measure for the performance of ad hoc networks. To the best of our knowledge, there is no analytical study that provides a closed form solu...

The medium access control (MAC) protocol is the main element which determines the system performance in wireless local area networks. The MAC technique of the IEEE 802.11 protocol is called Distributed Coordination Function (DCF). In IEEE 802.11 Wireless Local Area Networks (WLANs), network nodes experiencing collisions on the shared channel need to backoff for a random period of time, which is...

We study consensus in a message-passing system where only some of the n2 links exhibit some synchrony. This problem was previously studied for systems with process crashes; we now consider byzantine failures. We show that consensus can be solved in a system where there is at least one non-faulty process whose links are eventually timely; all other links can be arbitrarily slow. We also show tha...