Patent ID: 11864265
Assignee: T-MOBILE USA, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of providing a data traffic session, the method comprising:
receiving an indication, by an application server (AS), that a user equipment (UE) is registered with a first proxy node;
receiving, by the AS, from a call session control function, a first indication that the first proxy node is unavailable;
based on at least receiving the first indication that the first proxy node is unavailable, transmitting, by the AS, to a subscriber information node, a first message triggering proxy node restoration;
based at least on receiving an instruction to release a packet data network (PDN) connection, receiving, by the AS, an indication of the UE performing a proxy node discovery with a status repository, the status repository having a heartbeat timer associated with the first proxy, the heartbeat timer being reset each time a heartbeat message is received from the first proxy node, the heartbeat timer lapsing when no heartbeat messages are received from the first proxy during a period of the heartbeat timer;
receiving an indication, by the AS prior to the heartbeat timer lapsing, that the UE is registered with a second proxy node different than the first proxy node; and
based on at least receiving a session initiation message, establishing the data traffic session for the UE with the second proxy node.