Patent ID: 11470544

Abstract:
A method for routing messages relating to existing NF subscriptions includes receiving, at a first NRF, a request from a consumer NF instance creating a first NF subscription, determining that the first NRF does not have the requested NF profile, and forwarding the request to a second NRF. The method further includes receiving a response from the second NRF indicating that the second NRF has created the first NF subscription, modifying the response so that subsequent messages associated with the first subscription will be sent to the first NRF, and forwarding the response to the consumer NF instance. The method further includes receiving, by the first NRF, a message from the consumer NF instance relating to the first subscription, determining, that the second NRF is unavailable, and forwarding the message relating to the first subscription to a third NRF that functions as a mate of the second NRF.