5G technology offers higher bandwidth and lower delays, hence lower packet loss than previous RAN technologies, but packets loss can happen in the intermediate devices (gNB/routers/Switches/UPF etc.,) while packet travel from source (UE) to the destination (core network) and vice-versa. Packet loss is a very common problem in the networks, and it is very challenging for the network operators to identify where it is getting dropped and what is the reason. Any of the intermediate devices between source and destination could drop the packet due to many reasons viz., Network congestion, Security threats, TTL expiry (hop-limit expiration), unhandled MTU size, ACL drop, Next hop/host/port unreachable, QoS tail drop, Network hardware problems, Software bugs, Overtaxed devices etc., The techniques presented herein defines a method to allow 5G operators to detect the intermediate devices which are dropping packets of the user plane traffic. Also, the technique incorporate method to know the root cause (reason) for the packet drop with some more information that would help the operators to fix the issue.
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M M, NIRANJAN, "PACKET LOSS DETECTOR AND ANALYSER SERVICE IN 5G DEPLOYMENTS", Technical Disclosure Commons, (March 18, 2022)