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Trade-Offs between Query Delay and Data Availability in MANET’s

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Author(s): Umar I. Masumdar1 , N. S. Killarikar

Journal: International Journal of Engineering Trends and Technology
ISSN 2231-5381

Volume: 4;
Issue: 5;
Start page: 2163;
Date: 2013;
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Keywords: MANETs | data replication | query delay | data availability

ABSTRACT
As the importance of computers in our daily life increases it also sets new demands for connectivity. A Mobile Ad Hoc Network, also called MANET, is a collection of mobile interconnected nodes. In a MANET, the network topology can change unpredictably during data transmissions. In MANET’s the mobile devices are free to move haphazardly and organize themselves arbitrarily; due to this MANETs link/node failures are common, which leads to frequent network partitions. Due to this network partition, mobile nodes in one partition are not able to access data hosted by nodes in other partitions, and hence significantly degrade the performance of data access. So to deal with this problem, we apply data replication techniques. Most of the mobiles have limited amount of storage and bandwidth. So it is impossible for them to hold all the data needed for replica. To overcome this problem we are implementing some of the following techniques: The One-To-One Optimization (OTOO) Scheme, the Reliable Neighbor (RN) Scheme and Reliable Grouping (RG) Scheme. In OTOO scheme each node will replicate the data of the most neighbor data item. In RN scheme each node will replicate the data item of one neighbor to other. In RG scheme node will replicate the data item in large group so that each and every node can use the shared data.

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