White Space refers to the unused frequencies in the TV broadcast bands, usually in the UHF bands from 470MHz to 790MHz. These bands are of great importance to allowing new access technologies due to their superior propagation properties. New White Space Devices (WSDs) can utilize this white space in providing broadband internet access with no interference to the TV broadcasts by consulting a regulatory approved central TV White Space database.
Due to the superior propagation properties of the TV White Space frequecies, signals can reach longer distances than WiFi or Cellular wireless technolgies. A single TVWS basestation can have a radius coverage of 10-15 Km.
A TVWS geo-location database (TVWS-DB) is a database of available TVWS channels that WSD must consult in order to determine which bands are free (white) and which bands are not. The TVWS-DB is maintained by either the regulator or a licensed administrator. WSD can access this TVWS-DB directly through an administrator or a spectrum broker that not only facilitates access to the database, but also insures proper operations of secondary networks by means of spectrum management. The regulator maintains oversight over the entire process to ensure compliance of the TVWS-DB administrators and accuracy of its data.