Seminar presentation final
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This document discusses and compares different gossiping algorithms used in distributed systems for data transmission. It describes a randomized gossiping algorithm that selects nodes randomly, a perfect knowledge algorithm that provides dynamic knowledge without redundant transmissions but is difficult to synchronize, and a proposed virtual tree algorithm. The virtual tree algorithm aims to reduce redundant transmissions by propagating information along a virtual tree structure mimicking the real network topology. The document evaluates and compares the performance of these algorithms, particularly in handling node failures in mobile ad-hoc networks.
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In remote sensor arrange messages are exchanged between the different source and goal matches agreeably such way that multi-jump parcel transmission is utilized. These information bundles are exchanged from the middle of the road hub to sink hub by sending a parcel to goal hubs. Where each hub overhears transmission close neighbor hub. To dodge this we propose novel approach with proficient steering convention i.e. most brief way directing and conveyed hub steering calculation. Proposed work additionally concentrates on Automatic Repeat Request and Deterministic Network coding. We spread this work by the end to end message encoding instrument. To upgrade hub security match shrewd key era is utilized, in which combined conveying hub is allocated with combine key to making secure correspondence. End to end. We dissect both single and numerous hubs and look at basic ARQ and deterministic system coding as strategies for transmission.“Reducing packet loss in manet”
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Optimised Proactive Link State Routing For DOS Attack Prevention
A Mobile Ad hoc Network is a collection of independent mobile nodes that can communicate to each other via radio waves. The mobile nodes that are in radio range of each other can directly communicate, whereas others need the aid of intermediate nodes to route their packets. Each node has a wireless interface to communicate with each other. These networks are fully distributed, and can work at any place without the help of any fixed infrastructure as access points or base stations. Routing protocols are divided into two broad classes – Reactive and Proactive. In Reactive or on demand routing protocols the routes are created only when they are needed. The application of this protocol can be seen in the Dynamic Source Routing Protocol (DSR) and the Ad-hoc On-demand Distance Vector Routing Protocol (AODV). Wherein Proactive or Table-driven routing protocols the nodes keep updating their routing tables by periodical messages. OPSR proposes a proactive mechanism in source routing.
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Analytical Study of Cluster Based Routing Protocols in MANET
Analytical Study of Cluster Based Routing Protocols in MANETInternational Journal of Computer and Communication System Engineering
There are number of cluster based routing algorithms in mobile ad hoc networks. Since ad hoc networks are not accompanied by fixed access points, efficient routing is a must for such networks. Clustering approach is applied in mobile ad hoc network because clusters are more easily manageable and are more viable. It consists of segregating the given network into several reasonable clusters by using a clustering algorithm. By performing clustering we elect a worthy node from the cluster as the cluster head in such a way that we strive to reduce the management overheads and thus increasing the efficiency of routing. As for the fact that nodes in mobile ad hoc network have frequent host change and frequent topology change routing plays an important role for maintenance and backup mechanism to stabilize network performance. This paper aims to review the previous research papers and provide a survey on the various cluster based routing protocols in mobile ad hoc network. This paper presents analytical study of cluster based routing algorithms from literature. Index Terms— Ad- hoc networks, Cluster head, Clustering, Protocol, Route selection.Jamming aware traffic allocation for multiple-path routing using portfolio se...
Multiple-path source routing protocols allow a data source node to distribute the total traffic among available paths. we consider the problem of jamming-aware source routing in which the source node performs traffic allocation based on empirical jamming statistics at individual network nodes. We formulate this traffic allocation as a lossy network flow optimization problem using portfolio selection theory from financial statistics. We show that in multisource networks, this centralized optimization problem can be solved using a distributed algorithm based on decomposition in network utility maximization (NUM). We demonstrate the network's ability to estimate the impact of jamming and incorporate these estimates into the traffic allocation problem. Finally, we simulate the achievable throughput using our proposed traffic allocation method in several scenarios.
GRAPH THEORETIC ROUTING ALGORITHM (GTRA) FOR MOBILE AD-HOC NETWORKS (MANET)
Battlefield theater applications require supporting large number of nodes. It can facilitate many multi-hop
paths between each source and destination pairs. For scalability, it is critical that for supporting network
centric applications with large set of nodes require hierarchical approach to designing networks. In this
research we consider using Mobile Ad Hoc Network (MANET) with multiple clusters. Each cluster
supports a few nodes with a cluster head. The intra-cluster connectivity amongst the nodes within the
cluster is supported by multi-hop connectivity to ensure handling mobility in such a way that no service
disruption can occur. The inter-cluster connectivity is also achieved by multi-hop connectivity. However,
for inter-cluster communications, only cluster heads are connected. The selection of intra-cluster
communications and inter-cluster communications allow scalability of the network to support multiservices
applications end-to-end with a desired Quality of Service (QoS). This paper proposes graph
theoretic approach to establish efficient connection between a source and a destination within each cluster
in intra-cluster network and between clusters in inter-cluster network. Graph theoretic approach
traditionally was applied networks where nodes are static or fixed. In this paper, we have applied the
graph theoretic routing to MANET where nodes are mobile. One of the important challenges in MANET is
to support an efficient routing algorithm for multi-hop communications across many nodes which are
dynamic in nature. However, dynamic behavior of the nodes requires greater understanding of the node
degree and mobility at each instance of time in order to maintain end-to-end QoS for multi-service
provisioning. This paper demonstrates graph theoretic approach produces an optimum multi-hop
connectivity path based on cumulative minimum degree that minimizes the contention and scheduling
delay end-to-end. It is applied to both intra-cluster communications as well as inter-cluster
communications. The performance shows that having a multi-hop connectivity for intra-cluster
communications is more power efficient compared to broadcast of information with maximum power
coverage. Each cluster performs similarly and the algorithm is also used for inter-cluster communications.
Our simulation results show that the proposed graph theoretic routing approach will reduce the overall
delay and improves the physical layer data frame transmission.
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Seminar presentation final
- 1. Performance Evaluation of Gossiping Algorithm In Distributed System Marjia Ahmed Jui (090232) Nazmul Hossain Bilash (090236) 03 April, 2013
- 2. Distributed Systems Data Transmission Gossiping Algorithm Gossip based Randomized Algorithm Gossip based Perfect knowledge algorithm Gossip based Proposed Virtual tree algorithm. OverviewOverview 2/16
- 3. Non-centralized interconnected network, sub networks. Processing & databases are distributed . Communicate with one another to compute some value. Distributed SystemsDistributed Systems 3/16
- 4. Many Algorithms used for transmitting data. Epidemic Routing Algorithm: Fig: Message delivery from node S to D Data TransmissionData Transmission 4/16
- 5. Simple and easy to deploy It refers – Exchange mechanism Network components- source of information. Capable of information transfer. Scalability. Gossiping AlgorithmGossiping Algorithm 5/16
- 6. Gossip-based Algorithm- Randomized algorithm Perfect knowledge algorithm Proposed Virtual tree algorithm Continue…Continue… 6/16
- 7. Nodes are selected randomly Fig: Randomized algorithm redundancy example Randomized AlgorithmRandomized Algorithm 7/16
- 8. Dynamic knowledge No waste of transmissions. Very expensive ,difficult for synchronization & replication. Perfect Knowledge Algorithm 8/16
- 9. Fig: Propagating information in a network Continue….Continue…. 9/16
- 10. Continue…Continue… 10/16 Fig: Node update process in case of perfect knowledge algorithm
- 11. Propagates information to all nodes using virtual tree. To reduce redundant transmissions. Creates a tree structure that forms a real world network. Virtual Tree AlgorithmVirtual Tree Algorithm 11/16
- 12. Fig: Communication path for the network of 32 nodes Continues…Continues… 12/16
- 14. Virtual Tree Algorithm 14/16 Used for – Data aggregation Resource allocation. Propagating information Reduce redundant transmission
- 15. To create a tree structure, comparable real world network. Evaluate the performance for node failures . To measure actual latency & throughput. Mobile ad-hoc networks and handle failures of individual mobile nodes. Problems of GossipingGossiping Algorithm : 15/16
- 16. ReferenceReference 16/16 Reetu Dhar , “PERFORMANCE EVALUATION OF GOSSIPING ALGORITHMS ,“ Southern Connecticut State University ,2009.