Optical communication device, optical communication system, and optical communication method
An optical communication and optical signal technology, applied in transmission systems, electromagnetic wave transmission systems, electromagnetic network arrangements, etc., can solve problems such as the degradation of optical service quality
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no. 1 approach ）
[0195] Figure 27 This is a diagram showing a configuration example of the optical access system 100 . The optical access system 100 has an optical gateway (GW) 200 and an operating system (OPS) 300 . Subscriber device 40 communicates with optical access system 100 through optical access system 100 figure 1 A higher-level network such as the illustrated optical communication network 30 is communicably connected.
[0196] The subscriber device 40 is a device on the optical subscriber side. The subscriber device 40 is connected to the optical GW 200 via the transmission path 501 . The transmission path 501 is, for example, an optical fiber. The optical GW 200 is a device located in the communication central office. The subscriber apparatus 40 indicated by the symbol N1 and the optical GW 200 are connected via, for example, a transmission path 501 and a power divider 502 . The structure of the network connected from the subscriber apparatus 40 to the optical GW 200 may be v...
no. 2 approach ）
[0242] The present embodiment uses a return transmission path to communicate between multiple subscriber devices connected to the same optical GW. Hereinafter, the difference from the first embodiment will be mainly described.
[0243] Figure 38 This is a diagram showing a configuration example of the optical access system 105 . Figure 38 The optical access system 105 shown with Figure 36 The optical access system 103 shown is different in that an optical GW205 is provided in place of the optical GW203. The difference between the optical GW205 and the optical GW203 is that the optical GW205 is further provided with a multiplexer 247 and a demultiplexer 248 corresponding to the ground A where the optical GW205 is installed. The multiplexer 247 and the demultiplexer 248 are connected through the transmission path 547 . The transmission path 547 is a return transmission path.
[0244]Similar to the multiplexer 241 , the multiplexer 247 multiplexes the upstream optical sig...
no. 3 approach ）
[0252] The optical access system of this embodiment performs multicast communication. In this embodiment, the difference from the first and second embodiments will be mainly described.
[0253] First, use Figure 41 Multicast of downlink communication will be described. Figure 41 This is a diagram showing a configuration example of the optical access system 108 . Figure 41 The optical access system 108 is shown with Figure 40 The optical access system 107 shown is different in that an optical GW 208 is provided in place of the optical GW 207 . The optical GW208 is different from the optical GW207 in that it further includes a transmission path 549 that connects the return port of the optical SW210.
[0254] The case of multicasting the downlink optical signal transmitted from the ground C will be described. The optical SW control unit 320 performs control so as to connect the port to which the downlink optical signal from the ground C is inputted to the port for return...
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