From Sound to Sight: Using Audio Processing to enable Visible Light Communication

Mobile phones can use their cameras and flashlight Light Emitting Diodes (LEDs) to exchange messages with low complex Visible Light Communication (VLC) networks, but these interfaces impose serious restrictions when used in a VLC network. In this paper we discuss how to extend mobile phones or tablets with a small peripheral device that is battery-free, uses only passive components, and offers VLC capabilities at the required data rate (kilobit per second).

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Continuous Synchronization for LED-to-LED Visible Light Communication Networks

Off-the-shelf Light Emitting Diodes (LEDs) and low-cost microcontrollers provide the foundation for networking using the visible light as communication medium. These networks require fast and stable synchronization and a distributed protocol to handle shared medium access. We present and evaluate a physical layer and a distributed, contention-based medium access control protocol that enables reliable communication over room range distances; both are implemented in software using low-cost commercial off-the-shelf building blocks.

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System Architecture for Delay Tolerant Media Distribution for Rural South Africa

Wireless communication offers access to information even to users living in areas where little to no access to affordable communication channels is available. Delay Tolerant Networks (DTNs) enable content distribution in such areas, using mobility of devices and avoiding the need for traditional network infrastructure. In DTNs, data is passed from mobile device to mobile device, whenever possible, in an intelligent way.

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Mobile-Enabled Delay Tolerant Networking in Rural Developing Regions

Mobile technology is already playing an important role in the economic and social empowerment of rural communities in developing regions. However, rural areas often suffer from slow and unreliable network infrastructures. This limits access to content and services that may promote economic development. Focusing on under-served areas in rural developing regions, we aim to explore how ICT systems for collective intelligence can be used to foster economic and social empowerment of rural communities.

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