Portions of the radio spectrum that are allocated to licensees are
available for non-interfering use. This available spectrum is called
"white space". Allowing secondary users access to available spectrum
"unlocks" existing spectrum to maximize its utilization and to provide
opportunities for innovation, resulting in greater overall spectrum
utilization. One approach to managing spectrum sharing uses databases
to report spectrum availability to devices. To achieve
interoperability among multiple devices and databases, a standardized
protocol must be defined and implemented. This document defines such a
protocol, the "Protocol to Access White-Space (PAWS) Databases".