When establishing a PDU session, a session management function (SMF) receives a request from an access and mobility management function (AMF)/user device and exchanges messages with a number of network functions for performing the PDU session establishment. Currently, the SMF initiates a discovery request for each network function, which adds latency and load on the Nnrf interface. According to techniques described herein, the SMF sends only one discovery request for discovering multiple network functions, which reduces the load on the Nnrf interface and improves the call setup latency.
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Abraham, Jis and Mahamkali, Krishna Chaitanya, "IMPROVING 5G CALL SETUP TIME AND REDUCING LOAD ON NNRF INTERFACE", Technical Disclosure Commons, (May 22, 2023)