| 摘要 |
Switch fabrics ( 10 ) comprise first stages ( 11 ) for receiving multicast input signals (A-C) and second stages ( 12 ) for in response to the input signals generating output signals. The switch fabrics ( 10 ) are coupled to detectors ( 31 ) for detecting parameters indicating conditions of the second stages ( 12 ) per output signal and for generating detection results per output signal, and are coupled to controllers ( 21 ) for, in response to the detection results, controlling the second stages ( 12 ) per output signal. Such switch fabrics ( 10 ) handle output congestion in a more individual way. In case of one part of the second stage ( 12 ) being congested, the copying of the multicast input signals (A-C) into output signals and their internal transmission no longer need to be ceased. Only one of the output signals corresponding with the congested part of the second stage ( 12 ) cannot be delivered. Further detectors ( 32 ) detect further input signals (A-C) comprising segments of the same protocol data unit as the input signals (A-C).
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