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MANET is a collection of computational devices that creates random topology for communication. The beauty of MANET is that it not required any central controller or base station. The devices used in MANET may be fixed or mobile. MANET is only a network in which devices worked as a host as well as router. The routing protocol used in mobile ad hoc network is broadly classified in three category-proactive,...
DSR protocol is less considered for practical application due to its more limitations against other routing protocols. Modification in DSR protocol can make it considerable and it can improve energy efficiency to enhance lifetime of battery operated mobile adhoc networks. This paper proposes the modification for route discovery mechanism in normal DSR protocol for energy efficient route establishment...
In the future, mobile ad hoc network (MANET) is predicted to play more important roles for device communication with self organized infrastructure. Effectiveness of routing protocols and congestion control mechanisms, highly determines the performance of MANET. Previous research in protocol development did not pay much attention in selecting the appropriate protocol on other layers. Therefore, the...
In a mobile ad hoc network (MANET), communication between mobile nodes occurs without centralized control. In this environment the mobility of a node is unpredictable; this is considered as a characteristic of wireless networks. Because of faulty or malicious nodes, the network is vulnerable to routing misbehavior. The resource constrained characteristics of MANETs leads to increased query delay at...
MANET is an infrastructure less network and can work without any devices dependencies. These are short range wireless types of medium which support radio frequency transmission. It has low weight construction of protocol for movable hand held devices so many functionalities is lost which breaches security concerns. Among all of them most threatening is intrusion which deals with various types of attacks...
Node movement feature of Vehicular ad hoc network (VANET) closely resembles with that of mobile ad hoc network (MANET) but its high speed mobility and unpredictable movement characteristics are the key contrasting feature from that of MANET. The similarity nature suggests that the prevailing routing protocol of MANET is very much applicable to VANET. However, on the same line, the dissimilarity characteristics...
Choosing a routing protocol is an essential part in the success of the communication in mobile Ad-Hoc networks (MANET), since their topology is constantly changing. In many MANET applications (such as rescue tasks applications) it is necessary to assure reliable communication among network nodes. In this paper is showed a performance evaluation of two reactive routing protocols in order to know which...
In order to evaluate the behavior and performance of protocols for Mobile Ad Hoc Networks (MANETs) both simulation and test bed are often used. The simulation is used in first stages and the test bed is used in final stages of development process when real-world tests are needed. Click Modular Router is known as an efficient software architecture for building flexible and configurable routers for...
We present a new method for routing MAC frames at layer 2 (L2) within an 802.11 MANET. The new method, Multihop Clear Channel Assessment (MCCA), improves on the RTS/CTS mechanism used in the 802.11 DCF by extending it from a single hop protocol to a multihop one. Such an approach can, in some circumstances, eliminate the need for a routing protocol at layer 3 (L3), since frames, instead of being routed...
An ad hoc network comprises of mobile computing devices that use wireless transmission for communication. It has no fixed infrastructure. The mobile devices also serve as routers. Ad hoc wireless networks can be deployed quickly anywhere and anytime as they eliminate the complexity of infrastructure setup. It finds applications in military communications, emergency operations, hybrid wireless network...
Movement of nodes in MANET makes the role of routing protocols tremendously important. Ad-hoc On Demand Distance Vector algorithm is a quick and efficient routing protocol for reduced broadcast. The dynamic and mobile nature of these networks faces frequent link failures resulting into broken routes. If the originating node is irresponsible to reinitiate route discovery, routing overhead may significantly...
An ad hoc network is a group of wireless mobile computers or nodes in which individual nodes cooperate by forwarding packets for each other to allow nodes to communicate beyond direct wireless transmission range. In this paper I presented the design and performance evaluation of a new on demand ad hoc routing protocol, called SWARM. SWARM used mechanisms of swarm intelligence to based select good...
In this paper, we unified two new algorithms, i.e., to selectively Bordercast the control packets in order to reduce the network load by limiting the number of control packets when ZRP searches for a new route. The second algorithm is proposed to optimize the performance of Query control mechanisms for the Zone Routing Protocol (ZRP) for mobile ad hoc networks for communication on an urban terrain...
Mobile Ad hoc networks (MANETs) are composed of a collection of independent nodes usually connected by low bandwidth Radio Frequency (RF) links which are challenging for transmitting video and high bandwidth applications for rescue workers in emergency situations. Earlier we proposed a routing protocol, called AODVH to use for high bandwidth communication for search and rescue operations in a disaster...
Energy efficient Routing is one of the key issues in MANETs due to their highly dynamic topology and limited battery power at the nodes. In particular identifying energy efficient routing is the most important design criterion in static and dynamic ad-hoc networks. Power failure of a mobile node not only affects the node itself but also reduces the overall network lifetime. The goal of this paper...
In a practical ad hoc network scene where routing attacks are deployed, attackers are likely to be located in specific geographical region, which is likely to cause different influence on network performance. Though many simulations works has been done on sorting out different kinds of attacks, little work has been focused on the potential link between the severity of attack and the deployment of...
In this paper, we investigate the benefits and tradeoffs among various routing strategies used in Mobile Ad Hoc Networks (MANET). In particular, we compare the performance of OSPF-MDR, OLSR, and Composite Routing. Our composite routing implementation is based on further extensions of OSPF-MDR that employs OLSR as the sub-IP MANET routing protocol. The performance evaluation was conducted on an emulation...
Wireless multihop ad hoc networks face a multitude of challenging problems including highly dynamic multihop topologies, lossy and noisy communication channels, and sporadic connectivity which contribute to frequent link failures. Rapid and accurate link failure detection is therefore important to maintain correct and optimum operation of network routing protocols. In this paper, we propose a unified...
In this paper, we present the implementation and analysis of our implemented testbed considering the Optimized Link State Routing (OLSR) protocol for Mobile Ad hoc Networks (MANET). We investigate the effect of mobility and topology changing in the throughput of MANETs. We study the impact of best-effort traffic for Mesh Topology. Experimental time is 150 seconds. In this work, we consider 6 experimental...
The mobility model is one of the most important factors in the performance evaluations of a mobile ad hoc network (MANET). The Manhattan mobility model has been used to model the node's mobility, where the movement pattern of mobile node on streets and roads defined by maps. However, DakNet ad hoc network that uses wireless technology to provide digital connectivity among villages, kiosks and private...
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