Method of managing time-slot interchange in classic...

Details Method of managing time-slot interchange in classic... Method of managing time-slot interchange in classic...

H - Electricity

04

L

H04L 12/437 (2006.01) H04J 3/08 (2006.01) H04L 12/43 (2006.01)

Patent

CA 2355997

A method of managing the change of time slot allocation in classical MS-SP ring networks. In two-fiber rings, the criterion for choosing the low priority AU-4 to be used for the protection in case of simple failure can be summarized as follows: given an STM-n ring line signal, where "n" is the overall number of the handled channels, there results that LP AU-4#X LP = AU-4 #(X HP + n/2), where X is the HP AU-4 index in the failured span. In four-fiber rings, AU-4 LP = AU-4 #X HP. Should two or more failures occur, criteria are provided for selecting one of the failured spans and tracing the problem back to the case of single two/four fiber ring failure.

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