US 12,035,180 B2
First network node, wireless device and methods performed thereby for handling a link switch
Sakib Bin Redhwan, Linköping (SE); Nicklas Johansson, Brokind (SE); Pradeepa Ramachandra, Linköping (SE); Reza Moosavi, Linköping (SE); and Sofia Ek, Uppsala (SE)
Assigned to Telefonaktiebolaget LM Ericsson (Publ), Stockholm (SE)
Appl. No. 17/268,713
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Aug. 15, 2019, PCT No. PCT/SE2019/050748
§ 371(c)(1), (2) Date Feb. 16, 2021,
PCT Pub. No. WO2020/036530, PCT Pub. Date Feb. 20, 2020.
Claims priority of provisional application 62/765,011, filed on Aug. 17, 2018.
Prior Publication US 2021/0321306 A1, Oct. 14, 2021
Int. Cl. H04W 36/00 (2009.01); H04W 36/08 (2009.01); H04W 36/36 (2009.01); H04W 74/0833 (2024.01); H04W 76/27 (2018.01)
CPC H04W 36/0058 (2018.08) [H04W 36/00837 (2018.08); H04W 36/08 (2013.01); H04W 36/362 (2023.05); H04W 74/0833 (2013.01); H04W 76/27 (2018.02)] 11 Claims
OG exemplary drawing
 
1. A method, performed by a first network node, for handling a link switch, by a wireless device, from a source link to a target link, the first network node and the wireless device operating in a wireless communications network, the method comprising:
transmitting, to the wireless device, a first indication, the first indication indicating to select, out of a plurality of target links simultaneously fulfilling a respective condition to switch from a source link to a target link, a first target link to switch from the source link to the selected first target link, the selecting being based on at least one of: a Reference Signal Received Power, RSRP, value, a Reference Signal Received Quality, RSRQ, value, a Signal to Interference and noise ratio, SINR, value, a priority, Random Access Channel, RACH, resources, a cell in which latest measurements were made, or a frequency, of the respective target links in the plurality of target links;
obtaining, from the wireless device, a second indication, the second indication indicating a probability of radio link failure;
transmitting a third indication, the third indication indicating whether or not, if, during a second time period, the respective condition to switch from the source link to the target link remains unfulfilled by all of the target links in the plurality of target links after one of: i) a value based on expiration of a timer and ii) receipt of a number of out of synchronization messages, the wireless device is to: a) refrain from declaring radio link failure, and b) switch from the source link to a second target link selected from the plurality of target links, and transmitting of the third indication is based on the obtained second indication;
transmitting a fourth indication, the fourth indication indicating a time period to be waited prior to initiating the switch from the source link to the selected second target link; and
handling the link switch from the source link to the target link, based on the transmitted first indication.