Towards Dynamic Real-Time Geo-location Databases for TV White Spaces

TL;DR

This paper introduces DynaWhite, a cloud-based system that enhances TV white space databases by tracking both transmitters and receivers, using traditional and passive sensing methods to significantly improve spectrum availability.

Contribution

The paper proposes DynaWhite, a novel architecture combining sensing techniques and passive receiver detection to enable real-time, fine-grained TV white space management.

Findings

Potential for increased white space availability

Significant spectrum efficiency improvements

Feasibility of passive receiver detection

Abstract

Recent FCC regulations on TV white spaces allow geo-location databases to be the sole source of spectrum information for White Space Devices (WSDs). Geo-location databases protect TV band incumbents by keeping track of TV transmitters and their protected service areas based on their location, transmission parameters and sophisticated propagation models. In this article, we argue that keeping track of both TV transmitters and TV receivers (i.e. TV sets) can achieve significant improvement in the availability of white spaces. We first identify wasted spectrum opportunities, both temporal and spatial, due to the current approach of white spaces detection. We then propose DynaWhite, a cloud-based architecture that orchestrates the detection and dissemination of highly-dynamic, real-time, and fine-grained TV white space information. DynaWhite introduces the next generation of geo-location databases by combining traditional sensing techniques with a novel unconventional sensing approach based on the detection of the passive TV receivers using standard cell phones. We present a quantitative evaluation of the potential gains in white space availability for large scale deployments of DynaWhite. We finally identify challenges that need to be addressed in the research community in order to exploit this potential for leveraging dynamic real-time fine-grained TV white spaces.