TY  - JOUR
T1  - Storage Capacity of Opportunistic Information Dissemination Systems
A1  - Rizzo, Gianluca
A1  - Marsan, Marco G Ajmone
A1  - Palma, Noelia Perez
A1  - vincenzo mancuso
JA  - IEEE Transactions on Mobile Computing
Y1  - 2021
N2  - Floating Content (FC) is a paradigm for localized infrastructure-less content dissemination, that aims at sharing information
among nodes within a restricted geographical area by relying only on opportunistic content exchanges. FC provides the basis for the
probabilistic spatial storage of shared information in a completely decentralized fashion, usually without support from dedicated
infrastructure. One of the key open issues in FC is the characterization of its performance limits as functions of the system parameters,
accounting for its reliance on volatile wireless exchanges and on limited user resources. This paper takes a first step towards tackling
this issue, by elaborating a model for the storage capacity of FC, i.e., for the maximum amount of information that can be stored
through the FC paradigm. The storage capacity of FC, and of similar probabilistic content dissemination systems, is evaluated with a
powerful information theoretical approach, based on a mean field model of opportunistic information exchange. In addition, an
extremely simple explicit approximate expression for storage capacity is derived. The numerical results generated by our analytical
models are compared to the predictions of realistic simulations under different setups, proving the accuracy of our analytical
approaches, and characterizing the properties of the FC storage capacity.
ER  -