Abstract
When disaster strikes, effective communication is crucial for emergency responses and accessing a victim’s location. Using smartphone-based Delay Tolerant Networks (DTNs) is the prevalent proposed approach to work around network disruptions. One of the challenges in these networks is high-traffic congestion since buffer limitation produces messages that get dropped before they are delivered. This article presents a congestion control strategy using message prioritization for DTNs to increase network resilience facing high message congestion. We measure congestion by considering the free space in the buffer of the nodes involved in the routing or by counting the messages deleted from the buffer in a fixed period to improve the availability and immediacy of information for disaster scenarios. We evaluated the proposed strategies using The ONE simulator to test different mobility models and communication protocols. Results show that the strategy improved delivery rate, buffer usage, eliminated messages, overhead, and latency for the highest priority messages. The best results were obtained in terms of latency, which fits our disaster scenario since timely information is vital. The trade-offs are a slightly lower average delivery rate and a decrease in the lowest priority message delivery rate.
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Acknowledgements
The authors want the thank the project Fondecyt Iniciación \(\text{N}^{\underline{\text o}}\)11181028 and STIC-AMSUD code 20-STIC-01, ANID, Chile. Nicolás Hidalgo would like to thank the project Fondecyt Iniciación \(\text{N}^{\underline{\text o}}\)11190314, ANID, Chile.
Funding
The work of the authors Erika Rosas and Orlando Andrade was funded by Agencia Nacional de Investigación y Desarrollo, project Fondecyt Iniciación \(\text{N}^{\underline{\text o}}\)11181028. The work of the Nicolás Hidalgo was funded by Agencia Nacional de Investigación y Desarrollo, project Fondecyt Iniciación \(\text{N}^{\underline{\text o}}\)11190314.
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E.R. did the conceptualization of the project. E.R., O.A., and N.H. participated in the research process. E.R. and O.A. defined the methodology. O.A. prepared all the figures and evaluation results. E.R. and O.A. wrote the main manuscript text. All authors reviewed the manuscript.
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Rosas, E., Andrade, O. & Hidalgo, N. Effective communication for message prioritization in DTN for disaster scenarios. Peer-to-Peer Netw. Appl. 16, 368–382 (2023). https://doi.org/10.1007/s12083-022-01416-2
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DOI: https://doi.org/10.1007/s12083-022-01416-2