Methods and apparatuses for facilitating determination of available spectrum

An apparatus comprising at least one processor and at least one memory storing computer program code, wherein the at least one memory and stored computer program code are configured, with the at least one processor, to cause the apparatus to at least:

• receive a query originated by a white space device for an indication of available frequency spectrum at a location of the white space device;
• determine whether the location of the white space device is within an area served by a first database;
• in an instance in which it is determined that the location of the white space device is within the area served by the first database, cause an indication of available frequency spectrum at the location of the white space device to be provided to the white space device;
• and
• in an instance in which it is determined that the location of the white space device is not within the area served by the first database:
• determine a second database, the second database serving an area including the location of the white space device;
• and
• cause access information for the second database to be provided to the white space device.

An apparatus comprising at least one processor and at least one memory storing computer program code, wherein the at least one memory and stored computer program code are configured, with the at least one processor, to cause the apparatus to at least:

• receive a query of a first database, the query being originated by a white space device for an indication of available frequency spectrum at a location of the white space device;
• determine, based at least in part on a location of the white space device, whether a transmission interference zone of the white space device extends into an area served by a second database;
• in an instance in which it is determined that the transmission interference zone of the white space device does not extend into an area served by a second database, determine available frequency spectrum at the location of the white space device based on the first database;
• in an instance in which it is determined that the transmission interference zone of the white space device extends into an area served by a second database, consult the second database to determine available frequency spectrum at the location of the white space device based on both the first database and the second database, and
• cause an indication of the determined available frequency spectrum to be provided to the white space device.

An apparatus comprising at least one processor and at least one memory storing computer program code, wherein the at least one memory and stored computer program code are configured, with the at least one processor, to cause the apparatus to at least:

• cause a query of a first database for an indication of available frequency spectrum at a location of the apparatus to be sent to a database apparatus configured to provide access to the first database;
• in an instance in which the location of the apparatus is within an area served by the first database, receiving an indication of available frequency spectrum at the location of the apparatus;
• and
• in an instance in which the location of the apparatus is not within the area served by the first database, receiving access information for a second database, the second database serving an area including the location of the apparatus.