Brona Brejova, Stefan Dobrev, Rastislav Kralovic, Tomas Vinar.
Efficient routing in carrier-based mobile networks.
Theoretical Computer Science,
Download from publisher | Early version | BibTeX
The past years have seen an intense research effort directed at study of delay/disruption tolerant networks and related concepts (intermittently connected networks, opportunistic mobility networks). As a fundamental primitive, routing in such networks has been one of the research foci. While multiple network models have been proposed and routing in them investigated, most of the published results are of heuristic nature with experimental validation; analytical results are scarce and apply mostly to networks whose structure follows deterministic schedule. In this paper, we propose a simple model of opportunistic mobility network based on oblivious carriers, and investigate the routing problem in such networks. We present an optimal online routing algorithm and compare it with a simple shortest-path inspired routing and optimal offline routing. In doing so, we identify the key parameters (the minimum non-zero probability of meeting among the carrier pairs, and the number of carriers a given carrier comes into contact) driving the separation among these algorithms.