US 12,137,061 B2
Opportunistic radio frequency transmissions in a centralized network of secondary users
Shiva Sarrafan, Mercer Island, WA (US); Arun Naidu, Woodinville, WA (US); and Jim M. Elder, Seattle, WA (US)
Filed by Meteorcomm, LLC, Renton, WA (US)
Filed on Sep. 21, 2020, as Appl. No. 17/027,576.
Claims priority of provisional application 62/902,953, filed on Sep. 19, 2019.
Prior Publication US 2021/0091898 A1, Mar. 25, 2021
Int. Cl. H04L 5/00 (2006.01); H04L 45/16 (2022.01); H04W 72/0446 (2023.01); H04W 72/0453 (2023.01); H04W 72/30 (2023.01)
CPC H04L 5/0005 (2013.01) [H04L 5/0037 (2013.01); H04L 45/16 (2013.01); H04W 72/0446 (2013.01); H04W 72/0453 (2013.01); H04W 72/30 (2023.01)] 26 Claims
OG exemplary drawing
 
1. A method for opportunistic use by a secondary user (SU) node that comprises a transceiver of at least one frequency division multiplexed (FDM) channels in a frequency band in which primary users have priority of use, the SU node being one of a group of SU nodes forming a wireless network that comprises at least one central SU node and a plurality of remote SU nodes, the SU node comprising a transceiver and programmed logic for executing the method, the method comprising:
the SU node transmitting data to other SU nodes in the group in at least one of the FDM channels only during one or more predefined periodic data transmission periods synchronized to all of the SU nodes in the group; and
the SU node never transmitting a signal in the at least one of the FDM channels during a predefined, periodic primary user detection period synchronized to all the SU nodes in the group.