| 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. |
