We present an approach for creating distributed, component-based, simulations of communication networks by interconnecting models of sub-networks drawn from different network simulation packages. This approach supports rapid construction of simulations for large networks by reusing existing models and software, and fast execution using parallel discrete event simulation techniques. A dynamic si...

Mobile Ad Hoc Networks (MANETs) are multi-hop wireless networks where all nodes cooperatively maintain network connectivity. When the size of the network is large and the nodes are highly mobile, the frequency of link failure and energy consumption of the nodes will be more. Link failure will be identified only during the transmission of data packets. Due to this, control load of the network wi...

In mobile ad-hoc networks, nodes act both as terminals and information relays, and participate in a common routing protocol, such as Dynamic Source Routing (DSR). The network is vulnerable to routing misbehavior, due to faulty or malicious nodes. Misbehavior detection systems aim at removing this vulnerability. In this paper we investigate the use of an Artificial Immune System (AIS) to detect ...

Increasing popularity and availability of portable wireless devices, which constitute mobile ad hoc networks, calls for scalable ad hoc routing protocols. On-demand routing protocols adapt well with dynamic topologies of ad hoc networks, because of their lower control overhead and quick response to route breaks. But, as the size of the network increases, these protocols cease to perform due to ...

Broadcasting is a basic data dissemination technique, which has a number of applications such as address resolution, route discovery, as well as many other network services. While data broadcasting has many advantages, it introduces some problems known as broadcast storm problems, which causing a lot of contention, redundant retransmission and collision. In this paper our objective is to reduce...

MANET [1] is a cluster of wireless mobile computer where node shift in self-directed manner in any way .The developments in wireless technology in the present age have created networks with low cost and low power consumption. MANET is a type of multi-hop system, communications less and the most significant self-organizing. Due to wireless and spread nature there is an immense challenge for syst...

* This work is supported by ONR “MINUTEMAN” project under contract N00014-01-C-0016 AbstractA Mobile Ad Hoc Network (MANET) is usually assumed to be homogeneous, where each mobile node shares the same radio capacity. However, a homogeneous ad hoc network suffers from poor scalability. Recent research has demonstrated its performance bottleneck both theoretically and through simulation experimen...

A Mobile Ad Hoc Network (MANET) is usually assumed to be homogeneous, where each mobile node shares the same radio capacity. However, a homogeneous ad hoc network suffers from poor scalability. Recent research has demonstrated its performance bottleneck both theoretically and through simulation experiments. Building a physically hierarchical ad hoc network is a very promising way to achieve sca...

A new link layer protocol, quality of service hybrid multi channel protocol (QoS–HMCP), that takes into account the need for QoS support in multi-channel multi-interface wireless mesh networks (MCMI–WMNs) is proposed in this paper. QoS–HMCP protocol retains most properties of enhanced distributed channel access (EDCA) mechanism, defined by the 802.11 standard, as well as the basic mechanisms of...

Simulation is economical because it can carry out experiments without the actual hardware and provides a good compromise between complexity and accuracy. Simulation can be done by using the network simulators implemented in software which are valuable tools for researchers to develop, test and diagnose network protocols. Simulation is used to verify and evaluate the performance of networks. Res...