Apparatus and method for managing quality of a label switched path in a convergence network

A method for managing quality of a label switched path (LSP) in a convergence network management system, the method comprising the steps of:

• determining whether the LSP uses a MPLS (Multi-Protocol Label Switching) OAM (Operation, Administration and Management) packet or not;
• periodically polling the MPLS OAM packet from an egress node of the LSP to measure the quality of the LSP, when it is determined that the LSP uses the MPLS OAM packet;
• periodically polling statistic information from the each node through which the LSP passes to measure the quality of the LSP, when it is determined that the LSP does not use the MPLS OAM packet;
• and
• readjusting the LSP when the measured quality of the LSP deviates from a predetermined performance threshold,
• wherein the measured iuality of the LSP is expressed in at least one of currently-used packet amount information and dropped packet amount information of the LSP, and
• wherein the currently-used packet amount information of the LSP (ULSPk) is calculated by the following equation, where k is an identifier of an LSP, cnt denotes a hop count, nPiLSPk denotes the number and size of the packets at the i-th node through which the LSPk passes, and T(P) denotes a measuring time:
• U
• Lsp
• k
• =
• ∑
• i
• =
• 0
• cnt
• ⁢
• (
• nP
• i
• Lsp
• k
• )
• T
• (
• p
• )
• *
• cnt
• .