Providing security to mobile ad hoc network is itself a great challenge for the researcher. Since mobile ad hoc network is highly vulnerable to face different attacks due to its self organizing behavior, infrastructure less architecture and multihop network characteristics. The strength of ad hoc network infrastructure (due to wireless and distributed nature of MANETs) also becomes the point of...

In this paper we study non-geographical and mobile multi-hop ad hoc routing in a Underwater Sensor Network (UWSN), which is a novel network paradigm for ad hoc investigation of the world below the water surface using a wireless acoustic channel. However, the large propagation latency and very low bandwidth of the acoustic channel could potentially generate ubiquitous collisions and thus, any pr...

As a representative of a complex technological system, so-called wireless multihop ad hoc communication networks are discussed. They represent an infrastructure-less generalization of todays wireless cellular phone networks. Lacking a central control authority, the ad hoc nodes have to coordinate themselves such that the overall network performs in an optimal way. A performance indicator is the...

In this paper, we propose and investigate a bandwidth-efficient multicast routing protocol for ad-hoc networks. The proposed protocol achieves low communication overhead, namely, it requires a small number of control packet transmissions for route setup and maintenance. The proposed protocol also achieves high multicast efficiency, namely, it delivers multicast packets to receivers with a small...

Recent research points out that the flooding mechanism for topology update or route request in existing ad hoc routing protocols greatly degrades the network capacity. If we restrict the broadcast of control packets within a small subset of hosts in the network, the protocol overhead can be substantially reduced. This motivates our research of constructing a virtual backbone by computing a conn...

The design of efficient routing protocols for Ad hoc networks is a complex issue. These networks need efficient algorithms to determine ad hoc connectivity and routing. MANET aims not only to provide correct and efficient routes between pair of nodes but also to provide energy efficient route to maximize the life time of ad hoc mobile networks. In this paper, a dynamic energy conscious routing ...

The traditional TCP congestion control mechanism encounters a number of new problems and suffers a poor performance when the IEEE 802.11 MAC protocol is used in multihop ad hoc networks. Many of the problems result from medium contention at the MAC layer. In this paper, I first illustrate that severe medium contention and congestion are intimately coupled, and TCP’s congestion control algorithm...

Usually, Ad Hoc network studies concentrate on network layer procedures, such as routing, and performance of the upper layer protocols of the network. The research on ad hoc networking is mostly focused on the network layer solution and the characteristics of the used link technology are analyzed only superficially. Moreover, practically all ad hoc network simulators and testbeds assume IEEE 80...

In order to allow programmers to follow conventional techniques while creating applications that uses an internet, software in the internet must provide the same semantics as a conventional computer system, it means it must guarantee reliable communication. Transport protocol provides reliability, which is fundamental for all the applications. The transmission Control protocol (TCP) is the tran...