BLSR network having path-AIS generation function

Details BLSR network having path-AIS generation function BLSR network having path-AIS generation function

1994-12-20

1996-07-16

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 55, 370 8512, 371 206, 359119, H04L 12437

Patent

active

055373933

ABSTRACT:
A bidirectional line switched ring network having a path alarm indication signal (AIS) generation function, which is provided with ID writing means for writing, in the path overhead bytes of frames, IDs preassigned to add side nodes, tables for holding the correspondence between the IDs of add side nodes for sending frames to be dropped at drop side nodes and the number of the time slots to be used for the transmission of the frames, comparing means for comparing the IDs of the add side nodes read from the received path overhead bytes and the IDs in the tables corresponding to the number of the time slots used by the received frames, and path alarm indication signal generation means for generating and sending a path alarm indication signal (AIS) when the result of the comparison is that the two IDs do not match. By this, a path alarm indication signal can be generated at a high speed at the time of erroneous channel connection by simple hardware and a simple procedure.

REFERENCES:
patent: 4835763 (1989-05-01), Lau
patent: 4965790 (1990-10-01), Nishino et al.
patent: 5003531 (1991-03-01), Farinholt et al.
patent: 5278824 (1994-01-01), Kremer
patent: 5365510 (1994-11-01), Nicholson et al.
patent: 5406401 (1995-04-01), Kremer
patent: 5412652 (1995-05-01), Lu

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