We provide the implementation results of the distributed mutual exclusion algorithm based on Ricart-Agrawala algorithm for mobile ad hoc networks (MANETs) using the ns2 simulator described in [2]. The MANET consists of a ring of clusters and it is partitioned into a number of clusters periodically using the MCA [11]. Each cluster is represented by a coordinator. We also show a new algorithm to ...

Active Queue Management (AQM) schemes are a class of queueing algorithms designed to surmount some of the shortcomings of classic Drop-Tail queues in best-effort networks. Much recent work has focused on improving AQM performance through alternate approaches: in excess of 50 schemes have been proposed since 1999 alone. This study details a simulationbased evaluation and comparison of a subset o...

The Wireless network, applications and devices have been dramatic changes in throughout the last decade. Several issues related to the heterogeneity of such wireless environment were handled, namely the mobility management, resource allocation, security, quality of service and transparent handover. In fact, to meet the increasing demands of mobile users, the next generation wireless systems for...

Nowadays, underwater wireless sensor networks (UWSNs) are known as a powerful technique for aquatic applications. UWNS has long propagation delay, limited bandwidth and higher error rates in comparison with ground based networks. Moreover, a terrestrial wireless communication uses radio waves, but underwater communication relies on acoustic waves. Similar to other wireless sensor networks, desi...

Network tomography aims to obtain link-level performance characteristics, such as loss rate and average delay on each link, by end-to-end measurement. The obtained information can help us to understand the dynamic nature of networks. A number of methods have been proposed in recent years, which can be divided into two classes: multicast-based and unicast-based. In this paper, we propose an appr...

We present SADSR (Security-Aware Adaptive DSR), a secure routing protocol for mobile ad hoc networks. SADSR authenticates the routing protocol messages using digital signatures based on asymmetric cryptography. The basic idea behind SADSR is to have multiple routes to each destination and store a local trust value for each node in the network. A trust value is assigned to each path based on tru...

A mobile ad hoc network (MANET) consists of a set of mobile hosts that can communicate with each other without the assistance of base stations. Due to the dynamic nature of the network topology and restricted resources, quality of service (QoS) and multicast routing in MANET are challenging tasks which attract the interests of many people. In this paper, we present a fuzzy controller based QoS ...

Vehicular Ad hoc Networking (VANET) is a network that helps a vehicle to send information to neighboring vehicles, and data packets are transmitted from one vehicle to another vehicle. In VANET, Connection Breakage is an important issue in the existing routing protocols like Ad hoc On-demand Distance Vector (AODV), DSR, DSDV. In this paper, an analysis of Throughput and Control Overhead is done...

The use of wireless sensor networks in agriculture is anticipated to revolutionalise its operational mechanism. Many activities like moisture deficit monitoring, crop yield estimation and soil erosion can be automated using sensors. However, we need to develop deployment strategies, routing schemes appropriate for such applications. This paper focuses on special case of irrigated agriculture in...

Vehicle Ad-hoc Network is vulnerable to several attacks. One of the main attacks is the black hole attack which absorbs all the data packets in the network. In this paper, we have analyzed the performance of VANET in presence of black hole node by using different routing protocols AODV, DSR and AOMDV. This paper analyzed that which protocol is more vulnerable to the black hole attack and how mu...