US 12,238,668 B2
Nodes and methods for handling state change of a communication link in a communications network
Erqun Sun, Shanghai (CN); Debashish Pattnaik, Shanghai (CN); and Mikael Klein, Huddinge (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/754,997
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Oct. 18, 2019, PCT No. PCT/CN2019/111791
§ 371(c)(1), (2) Date Apr. 18, 2022,
PCT Pub. No. WO2021/072725, PCT Pub. Date Apr. 22, 2021.
Prior Publication US 2022/0394651 A1, Dec. 8, 2022
Int. Cl. H04W 4/00 (2018.01); H04L 67/55 (2022.01); H04L 69/28 (2022.01); H04W 60/00 (2009.01); H04W 68/00 (2009.01)
CPC H04W 60/00 (2013.01) [H04L 67/55 (2022.05); H04L 69/28 (2013.01); H04W 68/005 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method performed by a first communication node for handling state change of a communication link in a communications network, the method comprising:
subscribing to state information indicating a state change of a communication link between a User Equipment (UE) and a second communication node;
obtaining, from the second communication node, the state information indicating the state change;
obtaining, from a core network node, a terminating request for termination of an ongoing communication session of the UE;
providing, to the second communication node, a contact request for contact information of the UE which the terminating request was intended for;
obtaining the contact information of the UE from the second communication node; and
providing the terminating request to the UE based on the contact information obtained from the second communication node.