| 摘要 |
A TCM(Tandem Connection Monitoring) method in an MPLS network is provided to make a rate payment reference and responsibility clear based on an SLA(Service Level Agreement) conducted between a user and a service provider and between the service provider and a network provider. A service provider-level TCM receives a TCM packet from a customer equipment(S610), and calculates a BIP-16(Byte Interleaved Parity-16) from the received packet(S620). The TCM compares BIP-16 stored in the received packet and the calculated BIP-16 to check over whether or not there is an error(S630). If the two values are different, namely, if there is an error, the TCM stores 1 in an IE bit(S640). A BIP-9 is calculated, and the calculated value is stored in a service provider TCM BIP-8 of a packet(S650). The packet is transmitted(S660).
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