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Title: Performance improvement of delay-tolerant networks with mobility control under group mobility
Authors: Xie, LF
Chong, PHJ
Keywords: Delay-tolerant networks
Group formation enforcement
Group mobility
Group purposeful movement
Mobility control
Issue Date: 2015
Publisher: Korean Society for Internet Information
Source: KSII transactions on internet and information systems, 2015, v. 9, no. 6, p. 2180-2200 How to cite?
Journal: KSII Transactions on Internet and Information Systems 
Abstract: This paper considers mobility control to improve packet delivery in delay-tolerant networks (DTNs) under group mobility. Based on the group structure in group mobility, we propose two mobility control techniques; group formation enforcement and group purposeful movement. Both techniques can be used to increase the contact opportunities between groups by extending the group’s reachability. In addition, they can be easily integrated into some existing DTN routing schemes under group mobility to effectively expedite the packet delivery. This paper is divided into 2 parts. First, we study how our proposed mobility control schemes reduce the packet delivery delay in DTNs by integrating them into one simple routing scheme called group-epidemic routing (G-ER). For each scheme, we analytically derive the cumulative density function of the packet delivery delay to show how it can effectively reduce the packet delivery delay. Then, based on our second proposed technique, the group purposeful movement, we design a new DTN routing scheme, called purposeful movement assisted routing (PMAR), to further reduce the packet delay. Extensive simulations in NS2 have been conducted to show the significant improvement of PMAR over G-ER under different practical network conditions.
ISSN: 1976-7277
DOI: 10.3837/tiis.2015.06.012
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