US 12,144,047 B2
Methods for avoiding transmission of unnecessary messages in wireless communications and related networks and network nodes
Ivo Sedlacek, Hovorcovice (CZ); Peter Hedman, Helsingborg (SE); Kaj Johansson, Gothenburg (SE); Nianshan Shi, Järfälla (SE); and Paul Schliwa-Bertling, Ljungsbro (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/430,778
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Feb. 11, 2020, PCT No. PCT/EP2020/053506
§ 371(c)(1), (2) Date Aug. 13, 2021,
PCT Pub. No. WO2020/165192, PCT Pub. Date Aug. 20, 2020.
Claims priority of provisional application 62/806,873, filed on Feb. 17, 2019.
Prior Publication US 2022/0167450 A1, May 26, 2022
Int. Cl. H04W 76/18 (2018.01); H04W 76/30 (2018.01); H04W 88/14 (2009.01)
CPC H04W 76/18 (2018.02) [H04W 76/30 (2018.02); H04W 88/14 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method of operating a session management function (SMF) network node of a telecommunications network, the method performed by the SMF network node comprising:
sending to an access and mobility management function (AMF) network node an acceptance of a session establishment request of a wireless device;
receiving a message from the AMF network node, wherein the message includes a session connectivity rejection message sent by a radio access network node serving the wireless device, where the session connectivity rejection message indicates a rejection of the acceptance of the session establishment request of the wireless device;
determining that the radio access network did not send the acceptance of the session establishment request to the wireless device based on the session connectivity rejection message provided by the radio access network;
responsive to that the radio access network did not send the acceptance of the session establishment request to the wireless device, creating a session establishment rejection message; and
transmitting the session establishment rejection message toward the wireless device.