US 12,032,882 B1
Spectrum usage databases for cognitive radio
Hamid Aghajan, Palo Alto, CA (US)
Assigned to Siliconwaves Technologies Co. Ltd., Wuxi (CN)
Filed by Siliconwaves Technologies Co. Ltd., Wuxi (CN)
Filed on Jun. 8, 2022, as Appl. No. 17/806,054.
Application 17/806,054 is a continuation of application No. 16/168,659, filed on Oct. 23, 2018, granted, now 11,361,126.
Application 16/168,659 is a continuation of application No. 13/586,813, filed on Aug. 15, 2012, granted, now 10,108,757, issued on Oct. 23, 2018.
Claims priority of provisional application 61/523,798, filed on Aug. 15, 2011.
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 30/20 (2020.01); H04W 16/14 (2009.01); H04W 16/18 (2009.01); H04W 28/16 (2009.01); H04W 28/18 (2009.01); H04W 28/24 (2009.01); H04W 28/26 (2009.01); H04W 72/04 (2023.01)
CPC G06F 30/20 (2020.01) [H04W 16/14 (2013.01); H04W 16/18 (2013.01); H04W 28/16 (2013.01); H04W 28/18 (2013.01); H04W 28/24 (2013.01); H04W 28/26 (2013.01); H04W 72/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
specifying a spectral range comprising a set of channels, wherein each channel comprises a range of radio frequencies that are transmitted into a first geographic location;
for each channel, tuning a radio frequency receiver of a system to detect the range of radio frequencies of the channel in the first geographic location, and using the system and the radio frequency receiver of the system, during a first temporal length, measuring a signal energy of the range of radio frequencies of the channel;
for each channel, determining a measure of channel occupancy;
identifying channels of interest based on the determined measures of channel occupancy;
during a second temporal length, determining a transmission format of a channel of interest, and
determining a measurement of channel usage for the channel of interest based on the determined transmission format;
updating at least one database record of a spectrum usage database with at least one of the measures of channel usage;
wherein the database records correspond to samples at least partially populating a sampling grid, sampling indices of the sampling grid comprise a first index for geographic locations into which the set of channels are adapted to be transmitted including the first geographic location and a second geographic location that is different from the first geographic location, a second index for specified time points at which one or more of the channels are transmitted into the first and second geographic locations, and a third index for the ranges of the radio frequencies of the channels;
populating the sampling grid with samples generated from the samples for the first and second geographic locations, wherein the samples generated from the samples for the first and second geographic locations are for a third geographic location, the first, second, and third geographic locations are different geographic locations, and the first and second geographic locations do not overlap with the third geographic location; and
generating licensing parameters for a secondary license for transmission of the channels into the third geographic location based on the samples generated for the third geographic location.