A method of managing a television,TV, spectrum available for non-licensed applications, comprising: saving, in a first data storage medium at a central database, identification information and operational parameters for licensed TV band users operating in a geographical area; saving, in a second data storage medium at the central database, central identification information and central operational parameters for unlicensed television band devices, TVBDs, currently operating in the geographical area; negotiating local operational parameters with a local database (4; 4') for an unlicensed TVBD requesting access to the TV spectrum in the geographical area at least by: providing the local database (4; 4') with the local identification information of the unlicensed TVBD; obtaining at the local database (4; 4') operational parameters of a licensed TV band users operating in a service area of the local database (4; 4'); obtaining from one or more neighboring local databases (4; 4') the local operational parameters for unlicensed TVBDs operating in the service area of the respective neighboring local databases (4; 4'); determining the local operational parameters of the unlicensed TVBD based on the operational parameters of the licensed devices and the local operational parameters of the unlicensed devices; and providing the unlicensed TVBD with the local operational parameters; and registering the unlicensed TVBD on the second data storage medium in the central database once the unlicensed TVBD has obtained the local operational parameters from the local database (4; 4'). saving, in a first data storage medium at a central database, identification information and operational parameters for licensed TV band users operating in a geographical area; saving, in a second data storage medium at the central database, central identification information and central operational parameters for unlicensed television band devices, TVBDs, currently operating in the geographical area; negotiating local operational parameters with a local database (4; 4') for an unlicensed TVBD requesting access to the TV spectrum in the geographical area at least by: providing the local database (4; 4') with the local identification information of the unlicensed TVBD; obtaining at the local database (4; 4') operational parameters of a licensed TV band users operating in a service area of the local database (4; 4'); obtaining from one or more neighboring local databases (4; 4') the local operational parameters for unlicensed TVBDs operating in the service area of the respective neighboring local databases (4; 4'); determining the local operational parameters of the unlicensed TVBD based on the operational parameters of the licensed devices and the local operational parameters of the unlicensed devices; and providing the unlicensed TVBD with the local operational parameters; and providing the local database (4; 4') with the local identification information of the unlicensed TVBD; obtaining at the local database (4; 4') operational parameters of a licensed TV band users operating in a service area of the local database (4; 4'); obtaining from one or more neighboring local databases (4; 4') the local operational parameters for unlicensed TVBDs operating in the service area of the respective neighboring local databases (4; 4'); determining the local operational parameters of the unlicensed TVBD based on the operational parameters of the licensed devices and the local operational parameters of the unlicensed devices; and providing the unlicensed TVBD with the local operational parameters; and registering the unlicensed TVBD on the second data storage medium in the central database once the unlicensed TVBD has obtained the local operational parameters from the local database (4; 4').