Path establishment method for establishing paths of...

Details Path establishment method for establishing paths of... Path establishment method for establishing paths of...

2007-07-24

2007-07-24

Yao, Kwang Bin (Department: 2616)

Multiplex communications

Fault recovery

Bypass an inoperative channel

C370S395210

Reexamination Certificate

active

10355169

ABSTRACT:
In a communications network where multiple shared risk link groups are formed by links having a common risk, unreserved bandwidths are defined corresponding to all SRLG's and a maximum bandwidth of each link is set as an initial value of each of the defined unreserved bandwidths when a working path or a protection path of “1+1” or “1:1” recovery type is requested. When a protection path of “shared” recovery type is requested, unreserved bandwidths are defined corresponding to the SRLG's to which the links of its corresponding working path belong and a maximum bandwidth of each link is set as an initial value to each of the defined unreserved bandwidths. The bandwidth of the working or protection path is subtracted from each of the unreserved bandwidths. The request is rejected if a minimum of the subtracted values is smaller than a threshold.

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