Electronic device and method for selecting network function in communication system

A method performed by a management device for network function (NF) selection, the method comprising:

• transmitting a request message to each NF of a plurality of NFs connected to the management device;
• receiving at least one response message from at least one NF of the plurality of NFs after transmitting the request message to each NF;
• obtaining connection state information of each NF based on the request message transmitted to each NF and the at least one response message from the at least one NF;
• detecting a fault NF among the plurality of NFs based on the connection state information;
• and
• performing an NF selection procedure by configuring a restriction for a new call connection using the fault NF.

One or more non-transitory computer-readable storage media storing one or more computer programs including computer-executable instructions that, when executed by one or more processors of an electronic device individually or collectively, cause the electronic device to perform operations, the operations comprising:

• transmitting a request message to each NF of a plurality of NFs connected to a management device;
• receiving at least one response message from at least one NF of the plurality of NFs after transmitting the request message to each NF;
• obtaining connection state information of each NF based on the request message transmitted to each NF and the at least one response message from the at least one NF;
• detecting a fault NF among the plurality of NFs based on the connection state information;
• and
• performing an NF selection procedure by configuring a restriction for a new call connection using the fault NF.