Worst-case latency of broadcast in intermittently connected networks
by Mikael Asplund; Simin Nadjm-Tehrani
International Journal of Ad Hoc and Ubiquitous Computing (IJAHUC), Vol. 11, No. 2/3, 2012

Abstract: Worst-case latency is an important characteristic of information dissemination protocols. However, in sparse mobile ad hoc networks where end-to-end connectivity cannot be achieved and store-carry-forward algorithms are needed, such worst-case analyses have not been possible to perform on real mobility traces due to lack of suitable models. We propose a new metric called delay expansion that reflects connectivity and reachability properties of intermittently connected networks. Using the delay expansion, we show how bounds on worst-case latency can be derived for a general class of broadcast protocols and a wide range of real mobility patterns. The paper includes theoretical results that show how worst-case latency can be related with delay expansion for a given mobility scenario, as well as simulations to validate the theoretical model.

Online publication date: Tue, 13-Nov-2012

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