Disconnected operation in the Coda File System
ACM Transactions on Computer Systems (TOCS)
Rover: a toolkit for mobile information access
SOSP '95 Proceedings of the fifteenth ACM symposium on Operating systems principles
Computer Networks and ISDN Systems - Selected papers of the 3rd international caching workshop
On the scale and performance of cooperative Web proxy caching
Proceedings of the seventeenth ACM symposium on Operating systems principles
Summary cache: a scalable wide-area web cache sharing protocol
IEEE/ACM Transactions on Networking (TON)
Proceedings of the 10th international conference on Architectural support for programming languages and operating systems
Designing an architecture for delivering mobile information services to the rural developing world
Proceedings of the 15th international conference on World Wide Web
Low-cost communication for rural internet kiosks using mechanical backhaul
Proceedings of the 12th annual international conference on Mobile computing and networking
Poor man's broadband: peer-to-peer dialup networking
ACM SIGCOMM Computer Communication Review
DTLSR: delay tolerant routing for developing regions
Proceedings of the 2007 workshop on Networked systems for developing regions
Potential for collaborative caching and prefetching in largely-disconnected villages
Proceedings of the 2008 ACM workshop on Wireless networks and systems for developing regions
RuralCafe: web search in the rural developing world
Proceedings of the 18th international conference on World wide web
Comparing web interaction models in developing regions
Proceedings of the First ACM Symposium on Computing for Development
World Wide Web caching: trends and techniques
IEEE Communications Magazine
IEEE Journal on Selected Areas in Communications
VillageShare: facilitating content generation and sharing in rural networks
Proceedings of the 2nd ACM Symposium on Computing for Development
Chale, how much it cost to browse?: results from a mobile data price transparency trial in Ghana
Proceedings of the Sixth International Conference on Information and Communication Technologies and Development: Full Papers - Volume 1
Kwaabana: file sharing for rural networks
Proceedings of the 4th Annual Symposium on Computing for Development
Interactive web caching for slow or intermittent networks
Proceedings of the 4th Annual Symposium on Computing for Development
The increased bandwidth fallacy: performance and usage in rural Zambia
Proceedings of the 4th Annual Symposium on Computing for Development
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As information technology supports more aspects of modern life, digital access has become an important tool for developing regions to lift themselves from poverty. Though broadband internet connectivity will not be universally available in the short-term, widely-employed mobile devices coupled with novel delay-tolerant networking do allow limited forms of connectivity. This paper explores the design space for internet access systems operating with constrained connectivity. Our starting point is C-LINK, a collaborative caching system that enhances the performance of interactive web access over DTN and cellular connectivity. We discuss our experiences and results from deploying C-LINK in Nicaragua, before moving on to a broader design study of other issues that further influence operation. We consider the impact of (i) storing web content collaboratively cached across all user nodes, (ii) hybrid transport layers exploiting the best attributes of limited cellular and DTN-style connectivity. We also explore the behavior of future systems under a range of usage and mobility scenarios. Even under adverse conditions, our techniques can improve average service latency for page requests by a factor of 2X. Our results point to the considerable power of leveraging user mobility and collaboration in providing very-low-infrastructure internet access to developing regions.