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1. A. Hess, E. Hyytiä and J. Ott, Efficient Neighbor Discovery in Mobile Opportunistic Networking using Mobility Awareness, in 6th International Conference on Communication Systems & Networks (COMSNETS), 2014, Bangalore, India (bib)

   Abstract: To detect peers in mobile opportunistic networks, mobile devices transmit and listen for beacons (``scanning''). If networks are sparse, devices spend quite a bit of energy scanning the vicinity for possible contacts with their radios. Numerous techniques were developed to adapt the scanning intervals as a function of the observed node density. In this paper, we complement such techniques by considering that protocol exchanges between nodes require contacts of a minimal time span and infer scanning opportunities from node mobility. The adaptive beaconing presented in this paper reduces the scanning effort significantly without ``losing'' many contacts that last long enough to (i) fully establish an ad-hoc connection between two devices and to (ii) transfer a sizeable amount of data. We propose a theoretical model to derive connection probabilities from sojourn times in different mobility settings and evaluate the impact on energy consumption and data forwarding performance using simulations with different mobility models.