The system and manner in order to support the rehabilitation from the communication link fault in digital data network

摘要

(57) Abstract Network includes the multiple switching nodes which for transmitting the digital packet are mutually jointed with communication link. With respect to network one switching node passes by network at least and the element of that network, for example establishes, the bypass virtual circuit which such as switching node the bypass is done and communication link beforehand. The bypass virtual circuit stipulates the path to another switching node with respect to the said network. The 1st switching node when to the case where there is fault or other trouble in that element, the packet through that element, if trying probably to transmit, that way transfers the packet making use of the bypass virtual circuit which is formed.