US Patent No. 10,560,963

FIRST RADIO NODE AND METHOD THEREIN FOR PERFORMING A LISTEN-BEFORE-TALK (LBT) WITH A SELECTED LBT METHOD


Patent No. 10,560,963
Issue Date February 11, 2020
Title First Radio Node And Method Therein For Performing A Listen-before-talk (lbt) With A Selected Lbt Method
Inventorship Amitav Mukherjee, Fremont, CA (US)
Jung-Fu Cheng, Fremont, CA (US)
Sorour Falahati, Stockholm (SE)
Havish Koorapaty, Saratoga, CA (US)
Daniel Larsson, Stockholm (SE)
Yu Yang, Solna (SE)
Assignee Telefonaktiebolaget LM Ericsson (Publ), Stockholm (SE)

Claim of US Patent No. 10,560,963

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.