A probabilistic routing protocol for intermittently connected networks in rural scenarios
Résumé
Deploying communication networks in rural scenarios is challenging due to the sparse population density, geographical obstacles, lack of infrastructure, and daily life situations. Inspired by the PRoPHET protocol, we present the R-PRoPHET protocol to provide an intermittently connected network in a rural context, where the variable mobility of vehicles requires flexibility to model the encounters between nodes. Our protocol incorporates information about the time between encounters in the past to make smooth adjustments in parameters that impact the decision to relay messages. The R-PRoPHET protocol implements two forwarding strategies to manage the trade-off between the delivery ratio and the number of messages relayed along the network. Results showed that R-PRoPHET increases the delivery ratio by up to 20% and reduces the average latency by up to 16% compared to PRoPHET. The overhead produced by R-PRoPHET is around two times more than PRoPHET, which is part of the trade-off of increasing the average delivery ratio and reducing the average latency.
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