Patent ID: 11902137
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. An estimation apparatus configured to estimate a failure location in a service path that is a communication line or a communication path configured in a communication network, the estimation apparatus comprising:
a processor; and
a storage medium having computer program instructions stored thereon, when executed by the processor, perform to:
generate information regarding success or not success in a connectivity checking test between “N (N is equal to or greater than two)” nodes in a case in which a failure occurs at one or more locations in a verification target path including the N nodes, the information being generated as pattern information for each failure location in advance;
select “M (M is equal to or greater than two)” network devices configuring the service path from among a plurality of network devices in the communication network in accordance with occurrence of the failure;
execute the connectivity checking test between the selected network devices; and
compare a checking result of the connectivity checking test with the pattern information that satisfies “N=M” in the pattern information generated in advance, and, in a case in which the pattern information that satisfies “N=M” matches the checking result, estimate the failure location in the service path based on the failure location associated with the pattern information that satisfies “N=M”.