Analysis Of Reliability Calculations On Mobile Ad Hoc Networks

A group of wireless sensor nodes (devices) dynamically constructs a temporary network without the exercise of any pre-existing network infrastructure or centralized administration. The main goal of ad-hoc networking is multihop broadcasting in which packets are transferred from source node to destination node through the intermediate nodes (hops). The main function of multi hop WSN is to enable communication between two terminal devices through a bit of middle nodes, which are transferring information from one level to another level. On the foundation of network connectivity, it dynamically gets to determine that which nodes should get included in routing, each node involved in routing transmit the data to further

Network reliability is the ability of a network to maintain or restore an acceptable level of performance during network failures by application various restoration techniques and prevention of service outages from network failures by applying preventative techniques. (Network Survivability, 2001). Computing the reliability of a network is quite difficult; therefore estimation by means of simulation is a popular choice for determining network reliability.

MANETs (Mobile ad-hoc network) is defined as autonomous collection of wireless mobile nodes that are self-configure to construct a network that can communicate over relatively bandwidth constrained wireless links.

Abstract—Wireless Sensor Network (WSN) is basically a wireless network in which sensor nodes are distributed in any environment condition, to collect the data or information such as temperature, pressure, wind, sea level etc. and accordingly data or information will be passed to the main location. Reliable Trust and Reputation of a node stands for the measure of trust over a certain period of time which can be useful to evaluate the risk of attack from that particular node. We have combined all these parameters in order to risk of attack from a particular node.

There have been a lot of situations where we have seen loss of packets while transferring data. Therefore, multi-hop wireless ad hoc network has identified

With the drop of the hardware cost, more and more mobile devices with higher capacities are now used. The widely deployed wireless LAN and broadband wireless networks provide the ubiquitous network access for multimedia applications. Provision of Quality of Service (QoS) is challenging in mobile ad hoc networks because of the dynamic characteristics of mobile networks and the limited resources of the mobile devices. The wireless network is not reliable due to node mobility, multi-access channel and multi-hop communication.

Simulate a heterogeneous multihop wireless network by randomly deploying 55 nodes in an area of 1;000 m_1;000 m: n is the number of nodes having low and medium trust values. The number of nodes having high trust values is 55 _ n and their trust values are uniformly distributed in [0.8, 1). The number of nodes having low trust values is b0:67 _ nc and their trust values are

The Ad hoc On Demand Distance Vector (AODV) routing algorithm is a routing protocol designed for ad hoc mobile networks. AODV is capable of both unicast and multicast routing. It is an on demand algorithm, meaning that it builds routes between nodes only as desired by source nodes. It maintains these routes as long as they are needed by the sources. Additionally, AODV forms trees which connect multicast group members. The trees are composed of the group members and the nodes needed to connect the members. AODV uses sequence numbers to ensure the freshness of routes. It is loop-free, self-starting, and scales to large numbers of mobile nodes.

Abstract — The Delay Tolerant Networking (DTN) aims at providing effective medium for communicating where no continuous connectivity is guaranteed for a given network. It is really important especially when there are faulty nodes in a network. Mobile Sensor Networks are one of the most fault prone networks due to its inherent nature of limited resources. Existing routing schemes promotes the algorithms to make use of message replication to ensure high delivery rate for messages. Protocols that rely on message replication or flooding mechanisms contribute to overhead in network communication by producing large number of duplicate packets. This paper gives research findings along with a survey on performance of DTN routing protocols which

Wireless Sensor Networks give an extension between real world and virtual systems. Wireless systems are grouped into Wireless Personal Area Networks, Wireless Metropolitan Area Networks and Wireless Local Area Networks. They are comprehensively isolated into two classes one is infrastructure-aided and infrastructure less. Portable ad hoc systems are self-sorting out systems of versatile nodes with no foundation so it is infrastructure less system. Transitional or sending nodes is utilized to build up correspondence between nodes. The directing conventions are required on the grounds that the nodes needs to move in the fancied way and the routing strategy plays an essential part in ad hoc systems.

Abstract: In Mobile Ad-hoc Networks (MANETs), the main problem is the security as well as formation of communication amongst nodes was must work together with each other. Avoiding or sensing malicious nodes initiation grayhole or collaborative blackhole attack was the main challenges. The collaborative bait detection approach mixes the advantages of both proactive and reactive defense architecture. Here it use the technique of transposition for implementing security and the CBDA technique out fit a reverse tracing method to help in attaining the specified aim. The demonstration in the occurrence of malicious-node attack, the CBDA outperforms the DSR, and Best-Effort Fault-Tolerant Routing (BFTR) protocol in relations to packet delivery ratio and routing overhead. In that transposition method we use the key which was the key value of the character which was encrypted at sender side and decrypted at receiver.

The cross layer based reliable routing algorithm, is designed using the metric from the physical layer, data link layer and transferring it to the network layer to make the routing decisions. This algorithm involves the mobile node cooperatively to establish the route and introduces the radio link stability with extensive cross layer cooperation to establish reliable and stable routes. We have developed this algorithm by modifying the underlying principle of dynamic source routing protocol. Dynamic source routing is known for its benefits of routing in multiple paths avoiding the overhead of new route discovery whenever the route in use breaks [10. Hang Shen et.al, 2008]. The route discovery and route maintenance easily

Mobile ad hoc network is dynamic network topology without any central network for control. All the nodes in the network participate in networking functions like routing and packet forwarding as per the requirement. Nodes which  are in direct contact with each other communicate with single hop and those which are not in range takes multiple hops through intermediate nodes to reach destination

In the recent time, there will be an increasing need to provide application platforms such as internet deployment for areas without infrastructure, wireless video streaming between moving objects, data exchange between office equipment etc. These applications can be solved with the help of wireless ad hoc networks that can be realized e.g., with Wi-Fi protocols. The question arises, what theoretical throughput different wireless standards can achieve, and how much the throughput will decrease when data has to be transferred over several hops. This is a technology that enables un tethered wireless networking environments where there is no wired or cellular infrastructure. Wireless Ad hoc Networks since then is a fast developing research area with a vast spectrum of applications. Wireless sensor network systems enable the reliable monitoring of a variety of environments for both civil and military applications

Abstract—Mobile Ad-hoc Network (MANET) is a kind of wireless network. A Wireless ad-hoc network is a temporary network with no network infrastructure. The nodes communicate with each other, they co-operate by forwarding data packets to other nodes in the network. Thus the nodes find a path to the destination node using routing protocols. Due to the security vulnerabilities of the routing protocols, wireless ad-hoc networks are unprotected to attacks of the malicious nodes. One of these attacks is the Sinkhole Attack. Sinkhole attack is a kind of routing attack in MANET. A sinkhole node tries to attract all the network packets to it-self from all neighboring nodes. This paper focuses on to detect and prevent sinkhole node. The detection techniques which make use of proactive routing protocol have better packet delivery ratio and correct detection probability. The detection techniques which make use of reactive routing protocols have low overheads, but have high packet loss problem. Therefore, using a hybrid detection technique which combines the advantages of