US 11,700,534 B2
Frequency multiplexing of first and second OFDMA transmissions
Thomas Nilsson, Malmo (SE); and Dennis Sundman, Sollentuna (SE)
Assigned to TELEFONAKTIEBOLAGET LMERICSSON (publ), Stockholm (SE)
Appl. No. 16/766,831
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Dec. 4, 2017, PCT No. PCT/SE2017/051205
§ 371(c)(1), (2) Date May 26, 2020,
PCT Pub. No. WO2019/112493, PCT Pub. Date Jun. 13, 2019.
Prior Publication US 2021/0022004 A1, Jan. 21, 2021
Int. Cl. H04L 12/28 (2006.01); H04W 16/14 (2009.01); H04L 5/00 (2006.01); H04W 72/0453 (2023.01); H04W 74/08 (2009.01); H04J 1/16 (2006.01)
CPC H04W 16/14 (2013.01) [H04L 5/0007 (2013.01); H04W 72/0453 (2013.01); H04W 74/0891 (2013.01)] 41 Claims
OG exemplary drawing
 
1. A method performed in a wireless communications system for frequency multiplexing a first Orthogonal Frequency Division Multiple Access (OFDMA) transmission and a second OFDMA transmission on a shared radio channel spanning at least partly a common bandwidth, wherein a first network node and a first wireless device are operating in a first wireless communications network, and a second network node and a second wireless device are operating in a second wireless communications network, and wherein the method comprises:
determining an unallocated frequency band available beside a first frequency band intended/allocated for a first OFDMA transmission in the shared radio channel;
sending a sharing request comprising information about the unallocated frequency band;
deciding to use the unallocated band in a second frequency band in the shared radio channel;
conducting a contention procedure;
sending a legacy (L) preamble spanning the shared radio channel;
sending a first part of a High Efficiency (HE) preamble spanning the shared radio channel;
sending a first OFDMA transmission in the first frequency band, such that an end point of time of the first part of the HE preamble coincides with a start point of time of the first OFDMA transmission; and
sending a second part of the HE preamble and the second OFDMA transmission in the second frequency band.