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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2509.22568 |
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| _version_ | 1866908564975517696 |
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| author | Khamaisi, Karim Kamer, Oliver Rodrigues, Bruno von der Assen, Jan Stiller, Burkhard |
| author_facet | Khamaisi, Karim Kamer, Oliver Rodrigues, Bruno von der Assen, Jan Stiller, Burkhard |
| contents | During large-scale crises disrupting cellular and Internet infrastructure, civilians lack reliable methods for communication, aid coordination, and access to trustworthy information. This paper presents a unified emergency communication system integrating a low-power, long-range network with a crisis-oriented smartphone application, enabling decentralized and off-grid civilian communication. Unlike previous solutions separating physical layer resilience from user layer usability, our design merges these aspects into a cohesive crisis-tailored framework.
The system is evaluated in two dimensions: communication performance and application functionality. Field experiments in urban Zürich demonstrate that the 868 MHz band, using the LongFast configuration, achieves a communication range of up to 1.2 km with 92% Packet Delivery Ratio, validating network robustness under real-world infrastructure degraded conditions. In parallel, a purpose-built mobile application featuring peer-to-peer messaging, identity verification, and community moderation was evaluated through a requirements-based analysis. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_22568 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Bridging Technical Capability and User Accessibility: Off-grid Civilian Emergency Communication Khamaisi, Karim Kamer, Oliver Rodrigues, Bruno von der Assen, Jan Stiller, Burkhard Networking and Internet Architecture Cryptography and Security Computers and Society Emerging Technologies During large-scale crises disrupting cellular and Internet infrastructure, civilians lack reliable methods for communication, aid coordination, and access to trustworthy information. This paper presents a unified emergency communication system integrating a low-power, long-range network with a crisis-oriented smartphone application, enabling decentralized and off-grid civilian communication. Unlike previous solutions separating physical layer resilience from user layer usability, our design merges these aspects into a cohesive crisis-tailored framework. The system is evaluated in two dimensions: communication performance and application functionality. Field experiments in urban Zürich demonstrate that the 868 MHz band, using the LongFast configuration, achieves a communication range of up to 1.2 km with 92% Packet Delivery Ratio, validating network robustness under real-world infrastructure degraded conditions. In parallel, a purpose-built mobile application featuring peer-to-peer messaging, identity verification, and community moderation was evaluated through a requirements-based analysis. |
| title | Bridging Technical Capability and User Accessibility: Off-grid Civilian Emergency Communication |
| topic | Networking and Internet Architecture Cryptography and Security Computers and Society Emerging Technologies |
| url | https://arxiv.org/abs/2509.22568 |