Abstract
Climate change-induced and naturally-occurring multi-hazard risks (e.g., Cascadia megathrust earthquake followed by tsunamis in the U.S. Pacific Northwest or PNW) threaten humanity and society, in general, and critical Internet infrastructures, in particular. While mitigating the impacts of these hazards, in isolation, on terrestrial infrastructures has been the focus of prior efforts, we lack an in-depth understanding of infrastructure hardening efforts using non-terrestrial deployments such as low earth orbit or LEO satellites in the face of multi-hazard risks.
The main goal of this work is to evaluate whether LEO satellites can bolster the resilience of Internet infrastructure in the Pacific Northwest (PNW) against multi-hazard risks (Although we use the PNW as a demonstrative case in this work, we note that the solution can be applied to various geographic regions, at different granularities (e.g., city vs. state), and for a range of single- or multi-hazard risk scenarios.). To this end, we have developed a first-of-its-kind simulator called MAZE to understand the impacts that multi-hazard risks, each of which combined or in isolation, pose to wired and wireless infrastructures in the PNW. Using MAZE, we address two key challenges faced by first responders today: (1) navigating the cost vs. performance trade-offs in the hybrid routing of traffic between terrestrial and non-terrestrial networks during disasters, and (2) comparing the efficacy of using LEO satellites against a terrestrial risk-aware routing strategy (ShakeNet) and a global satellite network (BGAN) for emergency communication during multi-hazard risks. Our assessments show that LEO satellites offer two orders of magnitude latency improvement and 100 s of thousands of dollars in saving, all while maintaining network connectivity in the face of multi-hazard risks. To demonstrate the practicality and versatility of MAZE, we perform two case studies including testing a traffic prioritization scheme for LEO satellites and assessing the impacts of cascading risk on network infrastructures along the U.S. west coast.
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Notes
- 1.
In this context, the “impact” of infrastructure damage is characterized by complete failures resulting in the absence of any service.
- 2.
Similar to other terrestrial infrastructures (e.g., fiber-optic cables), ground stations are susceptible to availability and resiliency issues resulting from multi-hazard risks.
- 3.
In this work, we consider latency as the key performance metric because it translates directly to response times of first responders during a disaster. In future work, we plan to consider other metrics such as path congestion, throughput, among others.
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Acknowledgements
We thank the anonymous reviewers and our shepherd, Nitinder Mohan, for their insightful feedback. This work is supported by the Internet Society (ISOC) Foundation. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of ISOC.
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Stevens, A., Iradukunda, B., Bailey, B., Durairajan, R. (2024). Can LEO Satellites Enhance the Resilience of Internet to Multi-hazard Risks?. In: Richter, P., Bajpai, V., Carisimo, E. (eds) Passive and Active Measurement. PAM 2024. Lecture Notes in Computer Science, vol 14538. Springer, Cham. https://doi.org/10.1007/978-3-031-56252-5_9
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