SYSTEM AND METHOD TO REINFORCE FOGGING FOR LATENCY CRITICAL IOT APPLICATIONS IN 5G

The present disclosure relates to a method performed by a cloud node (104) for handling sensor nodes and fog nodes in a communications system (100), wherein the communications system comprises a plurality of sensor nodes (110) located at a plurality of locations, to be handled by the fog nodes (120), the method comprising obtaining (S300) a first number of sensor nodes and their respective locations, out of said plurality of sensor nodes, to monitor the communications system in its entirety, based on measurements from at least some of the plurality of sensor nodes at their respective locations; determining (S310) a second number of said fog nodes and their respective location, based on the first number of sensor nodes and a connectivity capacity of said second number of fog nodes, where the second number of fog nodes is determined to cover said first number of sensor nodes; ranking (S320) said second number of fog nodes according to a conditional probability of failure for the second number of fog nodes, based on determined information about the second number of fog nodes and their respective location; and identifying (S330) a top ranked subset of said second number of fog nodes, based on said ranking (S320) of said second number of fog nodes; and positioning (S340) a backup fog node at each location of the top ranked subset of the second number of fog nodes.