Group Mobility to Data Replication in Ad Hoc Networks Design - IEEE Projects

[Kalyan]

Group Mobility to Data Replication in Ad Hoc Networks Design

The behavior of a MANET when, for several reasons, the node density varies in such a way to cause subnet disconnections, is considered. Data replication is usually employed to avoid data loss in case of unwanted disconnection of a node, increasing its availability. A time-scale connectivity and node mobility; replicas can be distributed over the net, in order to make data available even during disconnection periods.

A formula can be derived, which allows to evaluate the replica availability in different scenarios, using the probability density functions describing the partitioning of a network obtained by a simulator. Applying this formula to different kind of networks, it is possible to tune the degree of replication desired for different scenarios, looking for a trade-off between space occupancy and availability gain.

We address the problem of replica allocation in a mobile ad hoc network by exploring group mobility. We first analyze the group mobility model and derive several theoretical results.We propose a replica allocation scheme to improve the data accessibility. Several experiments are conducted to evaluate the performance of the proposed scheme. The experimental results show that the proposed scheme is able to not only obtain higher data accessibility, but also produce lower network traffic than prior schemes.