| 摘要 |
By using wavelength division multiplexing technologies, redundant star topology network is constructed on a ring-shaped optical fiber network. Edge-switches 5 a , 5 b , 5 c, and 5 d are connected to client station groups 6 a , 6 b , 6 c, and 6 d are connected, respectively. The edge-switches 5 a , 5 b , 5 c, and 5 d are connected to edge optical transport device 2 a , 2 b , 2 c, and 2 d. Core-switches 4 a and 4 b are connected to a core optical transport device 1 . The edge optical transport device 2 a , 2 b , 2 c , 2 d, and the core optical transport device 1 are connected to a ring-shaped single optical fiber 3 . A communication circuit 7 is formed among core optical transport device 1 , edge optical transport devices 2 a , 2 b , 2 c, and 2 d, by using wavelength division multiplexing technologies.
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