Abstract: System and methods for repository function address blocking are described herein. A repository function in a wireless communications network may provide function addresses to requesting functions and may receive requests from such functions to block addresses that are unreachable by the requesting function. The repository function may store data indicating the blocked addresses and corresponding requesting function and filter those addresses from responses generated for address requests received from the corresponding requesting function. Function may also request addresses be unblocked after determining that connectivity to such addresses has been restored.

Abstract: Systems, devices, and techniques described herein are directed to managing discoverability of Session Management Functions (SMFs) in mobile networks based on connectivity to peer network functions (NFs). In particular, the systems, devices, and techniques can be implemented in fifth generation (5G) mobile networks to provide capability for an SMF to monitor connectivity with one or more peer network NFs, determine the connectivity with the one or more peer NFs does not satisfy a threshold level of connectivity with the peer NFs, and determine to suspend assignment of new calls and connections to the SMF. The SMF may then transmit a message to a network resource function (NRF) associated with the SMF to modify at least one status of the SMF at the NRF to cause the suspension of the assignment of the new calls and connections to the SMF.

Abstract: A Session Management Function (SMF) of a 5G core network can serve as a backup SMF for UEs associated with a particular Tracking Area Code (TAC). If a primary SMF for the TAC is unavailable, UEs can be assigned to the backup SMF for the TAC. The backup SMF can determine, by querying a Network Repository Function (NRF), when the primary SMF for the TAC becomes available. When the backup SMF determines that the primary SMF for the TAC may be available, the backup SMF can cause connected UEs associated with the TAC to detach from the backup SMF and the core network, such that the UEs can re-attach to the core network and be re-assigned to the primary SMF for the TAC.

Abstract: A method of managing a voicemail network is described herein. Voicemail system data for the voicemail network is received. The voicemail system data includes communication node data, source voicemail node data, and destination voicemail node data. A destination voicemail node is determined based on the destination voicemail node data and a destination voicemail node criteria. When the source voicemail node data meets a source voicemail node criteria, a communication node is associated with the destination voicemail node.