US 12,256,433 B2
Channel access procedures for directional systems in unlicensed bands
Sanjay Goyal, Deer Park, NY (US); Arnab Roy, Phoenixville, PA (US); Alpaslan Demir, East Meadow, NY (US); J. Patrick Tooher, Montreal (CA); Janet Stern-Berkowitz, Little Neck, NY (US); Moon-il Lee, Melville, NY (US); Lorenza Giupponi, Barcelona (ES); Sandra Lagén Morancho, Igualada (ES); Biljana Bojović, Barcelona (ES); and Mihaela Beluri, Jericho, NY (US)
Assigned to INTERDIGITAL PATENT HOLDINGS, INC., Wilmington, DE (US)
Filed by INTERDIGITAL PATENT HOLDINGS, INC., Wilmington, DE (US)
Filed on Sep. 23, 2022, as Appl. No. 17/951,969.
Application 17/951,969 is a continuation of application No. 16/754,355, granted, now 11,497,056, previously published as PCT/US2018/056353, filed on Oct. 17, 2018.
Claims priority of provisional application 62/689,046, filed on Jun. 22, 2018.
Claims priority of provisional application 62/574,548, filed on Oct. 19, 2017.
Prior Publication US 2023/0015536 A1, Jan. 19, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 74/0816 (2024.01); H04B 7/06 (2006.01)
CPC H04W 74/0816 (2013.01) [H04B 7/0695 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method performed by a first node to reserve a directional channel, the method comprising:
performing a first listen-before-talk (LBT) in a first beam direction towards a second node to which the first node intends to transmit;
detecting a first interfering signal based on the performed first LBT;
performing a second LBT in a second beam direction;
detecting a second interfering signal based on the performed second LBT;
determining a set of transmission parameters based on the determinations of the first and second LBT;
transmitting a transmission to the second node using the determined set of transmission parameters;
determining a set of LBT parameters of the second LBT based on a beam direction of the first LBT; and
performing the second LBT in the second beam direction according to the determined set of LBT parameters.