US 10,560,963 B2
First radio node and method therein for performing a listen-before-talk (LBT) with a selected LBT method
Amitav Mukherjee, Fremont, CA (US); Jung-Fu Cheng, Fremont, CA (US); Sorour Falahati, Stockholm (SE); Havish Koorapaty, Saratoga, CA (US); Daniel Larsson, Stockholm (SE); and Yu Yang, Solna (SE)
Assigned to Telefonaktiebolaget LM Ericsson (Publ), Stockholm (SE)
Appl. No. 15/524,985
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Nov. 3, 2015, PCT No. PCT/SE2015/051157
§ 371(c)(1), (2) Date May 5, 2017,
PCT Pub. No. WO2016/072916, PCT Pub. Date May 12, 2016.
Claims priority of provisional application 62/076,642, filed on Nov. 7, 2014.
Prior Publication US 2017/0339721 A1, Nov. 23, 2017
Int. Cl. H04L 12/413 (2006.01); H04W 74/08 (2009.01); H04W 16/14 (2009.01); H04W 28/08 (2009.01); H04W 72/12 (2009.01)
CPC H04W 74/0816 (2013.01) [H04W 16/14 (2013.01); H04W 28/08 (2013.01); H04W 72/1247 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method performed by a first radio node, the first radio node being configured to operate in a Long Term Evolution, LTE, wireless communications network, the method comprising:
selecting a Listen-Before-Talk, LBT, method based on a type of information to be transmitted to a second radio node in a radio channel in unlicensed spectrum;
performing an LBT with the selected LBT method on the radio channel;
when the type of information is data, the selected method comprises always deferring transmission of the data until one of: a) after completion of a first period of observation of the radio channel in which an outcome of the first period of observation of the radio channel is that the radio channel is idle, an outcome of at least a second period of observation of the radio channel is that the radio channel is idle, and b) an outcome of a first period of observation of the radio channel and one or more defer periods is that the radio channel is idle; and
when the type of information is one of control and management information, the selected method comprises allowing transmission of the information immediately after an outcome of the first period of observation is that the radio channel is idle, a duration of the first period of observation providing priority to the one of the control and the management information compared to data.