CPC H04W 76/18 (2018.02) [H04W 76/30 (2018.02); H04W 88/14 (2013.01)] | 22 Claims |
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.
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