On the Effect of Group Mobility to Data Replication in Ad Hoc Networks
Resource
IEEE Transactions on Mobile Computing
Journal
IEEE Transactions on Mobile Computing
Journal Volume
5
Journal Issue
5
Pages
492-507
Date Issued
2006-05
Date
2006-05
Author(s)
Huang, Jiun-Long
DOI
246246/200611150121819
Abstract
The growth in wireless communication technologies attracts a considerable amount of attention in mobile ad hoc networks.
Since mobile hosts in an ad hoc network usually move freely, the topology of the network changes dynamically and disconnection
occurs frequently. These characteristics make it likely for a mobile ad hoc network to be separated into several disconnected partitions,
and the data accessibility is hence reduced. Several schemes are proposed to alleviate the reduction of data accessibility by replicating
data items. However, little research effort was elaborated upon exploiting the group mobility where the group mobility refers to the
phenomenon that several mobile nodes tend to move together. In this paper, 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. In light of
these 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.
Subjects
Mobile data service
replica allocation
data accessibility
mobile computing
ad hoc networks
Publisher
Taipei:National Taiwan University Dept Chem Engn
Type
journal article
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