Patent ID: 11876670
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A diagnostic apparatus, comprising:
a processor; and
a storage medium having computer program instructions stored thereon, when executed by the processor, perform to:
estimate a state of a diagnostic target using a probabilistic inference algorithm having one or more probabilistic inference steps,
wherein the probabilistic inference algorithm includes a Bayesian network having inter-node conditional probability variables, and
wherein the diagnostic target is a communication network;
perform a verification test for verifying the estimated state,
the verification test including, in response to diagnosis of a fault in a first apparatus of the communication network, (1) confirming the state of the first apparatus in the communication network via a management network, (2) issuing an instruction to a second apparatus via the management network and causing communication confirmation to be executed from the second apparatus to the first apparatus, (3) acquiring alert information of the first apparatus, and determining a test result of the verification test based on results of (1), (2), and (3);
determine a likelihood of the estimated state based on the test result of the verification test; and
adjust the probabilistic inference algorithm based on a comparison of the estimated state and the test result of the verification test.