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Authors: | Franck Legendre |
Group: | Communication Systems |
Type: | Inproceedings |
Title: | Adding a Pinch of Delay to Extend the Lifetime of Opportunistic Content Dissemination Networks |
Year: | 2010 |
Month: | September |
Pub-Key: | Leg10a |
Book Titel: | Proceedings of ExtremeCom 2010 |
Keywords: | opportunistic networks; epidemic spreading; energy saving; mobility modeling |
Abstract: | Opportunistic content dissemination targets the broadcasting of content to a group of mobile users. In this paper, our primary interest is to leverage node gatherings to perform reliable link layer broadcasts and reach a higher number of recipients at once. Using a real-world trace collected in our lab, we first characterize mobility to get more insights on how we can take profit of gatherings resulting in cliques. From our findings, we design a new content dissemination strategy, the $k$-clique-based dissemination strategy. This approach delays the broadcasting of content until a clique has reached a size of $k$. We evaluate our solutions by replaying traces and comparing them to the original epidemic (pair-wise link layer unicast) approach. Results show that we can reduce by half the number of required transmissions with only a slight increase in the dissemination delay. Besides, our approach doubles the overall capacity of the network when multiple contents are being spread concurrently. Overall, our approach offers an interesting tradeoff strategy between the reduced number of wireless transmissions and only a slight increase in delay incurred by delaying broadcast transmissions until at least $k$ nodes can benefit from it. |
Location: | Dharamsala, India |
Resources: | [BibTeX] [Paper as PDF] |