Systems and methods for network function discovery in a segmented network

A system, comprising:

• a first network repository function (NRF) located in a first segment of a first core network, wherein the first NRF includes at least a first processor;
• a second NRF located in a second segment of the first core network, wherein the second NRF includes at least a second processor, and wherein the first core network is managed by a single telecommunications service provider and the first and second segments of the first core network are managed by the single telecommunications service provider;
• and
• at least one of a unified data management (UDM) function or a unified data repository (UDR) located in each of the first segment and second segment of the first core network,
• wherein the first NRF is configured to:
• subscribe to event information associated with at least one of a unified data management (UDM) function or a unified data repository (UDR) located in a second segment of the first core network, and
• receive, from the second NRF, at least one of UDM or UDR information associated with the at least one of the UDM function or UDR located in the second segment of the first core network, and
• wherein the second NRF is configured to:
• receive a status change indication associated with at least one of the UDM function or UDR located in the second segment of the first core network, and
• forward, to the first NRF, a notification message identifying the status change.

A non-transitory computer-readable medium having stored

• thereon sequences of instructions which, when executed by at least one processor associated with
• a network repository function (NRF) located in a first segment of a first core network, cause the
• at least one processor to:
• subscribe to event information associated with a first network function (NF) located in a second segment of the first core network;
• receive, from a second NRF located in the second segment of the first core network, at least one of unified data management (UDM) function or unified data repository (UDR) information associated with the at least one of a UDM function or a UDR located in the second segment of the first core network, wherein the first core network is managed by a single telecommunications service provider and the first and second segments of the first core network are managed by the single telecommunications service provider;
• and
• receive, from the second NRF, a status change message associated with at least one of the UDM function or UDR located in the second segment of the first core network.