ICOW: internet access in public transit systems

When public transportation stations have access points to provide Internet access to passengers, public transportation becomes a more attractive travel and commute option. However, the Internet connectivity is intermittent because passengers can access the Internet only when a transit vehicle is within the networking coverage of an access point at a stop. We propose ICOW, a system that provides a low-cost way for public transit operators to enhance quality of experience for passengers who access the Internet. Each public transit vehicle is equipped with a smart cache that serves popular content to passengers. The cache updates its content based on passenger requests when it is within range of Internet access points placed at stops, stations, or depots. We have developed a system architecture and built a prototype of the ICOW system. Our evaluation shows that ICOW is significantly more efficient than having passengers contact Internet access points individually and ensures continuous availability of content throughout the journey.