Informing method for attached circuit connection state in packet exchanging network and service device

Abstract

A packet switching network attachment circuit connection state notification method and service equipment includes increasing attachment circuit operation management and maintenance message, said message carrying sub-attachment circuit identity and sub-attachment circuit status field; when service equipment sub-attachment circuit state changes, through attachment circuit operation management and maintenance message notifying opposite terminal. Service equipment records local side sub-attachment circuit state and far end sub-attachment circuit state; when local side sub-attachment circuit state and far end sub-attachment circuit state being normal state simultaneously, according to said sub-attachment circuit corresponded pseudo circuit to make service retransmission; when local side sub-attachment circuit state or far end sub-attachment circuit state belonging to abnormal condition, not to make retransmission. The present invention raises PW retransmission validity, avoiding unable finally intercommunication service transmitting to waste nodal processing resource and network bandwidth resource.

Description

technical field [0001] The invention relates to the field of packet switching network technology, in particular to a service device in the packet switching network and a method for announcing the connection state of an associated circuit in the packet switching network. Background technique [0002] At present, when operators provide multiple services, they basically adopt a parallel or "overlapping" approach: build and maintain multiple networks, and use different access devices for each different service at the presentation point. In addition to making network planning more complicated, it is also expensive both in terms of construction costs and operating costs. Therefore, when providing multiple services, in order to reduce construction and operation costs, operators hope to find a method that can provide multiple services on a public packet switching network (PSN). [0003] In order to provide a unified multi-service network platform, the IETF started the standardizati...

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Problems solved by technology

[0023] The technical problem to be solved by the present invention is: to overcome the inadequacy of the emulation business for information that can not be accurately known under the NTO 1 mode of the emulation business on the packet switching network in the prior art, and to provide a service device in the packet switching network, and a packet switching network The method for notifying the connection state of the attached circuit in the switching network improves the effectiveness of PW forwarding and avoids wasting the processing resources of nodes along the way and precious network bandwidth resources in the transmission of services that cannot be eventually intercommunicated

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