A Replication Strategy for Mobile Opportunistic Networks based on Utility Clustering
Evangelos Papapetrou, Aristidis Likas

TL;DR
This paper proposes a utility clustering-based replication strategy for mobile opportunistic networks that reduces resource consumption while maintaining delivery performance, adaptable to various utility functions and social network characteristics.
Contribution
It introduces a clustering approach to improve dynamic replication by grouping nodes based on utility, reducing replicas and resource use without sacrificing delivery success.
Findings
Significantly reduces the number of replicas in diverse networks.
Maintains high delivery efficiency despite resource reduction.
Effective with multiple utility functions in social-aware networks.
Abstract
Dynamic replication is a wide-spread multi-copy routing approach for efficiently coping with the intermittent connectivity in mobile opportunistic networks. According to it, a node forwards a message replica to an encountered node based on a utility value that captures the latter's fitness for delivering the message to the destination. The popularity of the approach stems from its flexibility to effectively operate in networks with diverse characteristics without requiring special customization. Nonetheless, its drawback is the tendency to produce a high number of replicas that consume limited resources such as energy and storage. To tackle the problem we make the observation that network nodes can be grouped, based on their utility values, into clusters that portray different delivery capabilities. We exploit this finding to transform the basic forwarding strategy, which is to move a…
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