Method of tracing the route of virtual connections

Details Method of tracing the route of virtual connections Method of tracing the route of virtual connections

1995-04-11

1997-10-07

Chin, Wellington

Multiplex communications

Diagnostic testing

Path check

370249, 370397, 370410, H04J 312, H04L 1256

Patent

active

056755783

ABSTRACT:
A telecommunications network such as an ATM, Frame Relay or packet based network will be better managed by identifying nodes through which a virtual connection is routed between two end nodes. A new method of tracing the nodes on the route includes sending trace cells downstream of a monitoring node toward one or both end nodes. Each downstream node either loops back a trace cell identifying itself to the monitoring node or forwards the trace cell further. A plurality of trace cells sent along the route identify nodes located thereon. In one embodiment, the trace cell is an extension of the ATM FMOAM cell (ATM Fault Management OAM cell) specified for loopback functions.

REFERENCES:
patent: 5056085 (1991-10-01), Vu
patent: 5337307 (1994-08-01), Sato et al.
patent: 5384768 (1995-01-01), Fujii
patent: 5408461 (1995-04-01), Uriu et al.
patent: 5440565 (1995-08-01), Miyamoto et al.
The ATM Forum, "ATM User-Network Interface Specification", pp. 63-68.

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