Vol.4 No.2 2011

Research paper : Demonstration of optical communication network for ultra high-definition image transmission (J. Kurumida et al.)−114−Synthesiology - English edition Vol.4 No.2 (2011) distance 105 km would fall into the error correctable range could only be confirmed by the experiment, and this was a major point of the video distribution experiment.After the long-distance, high-speed communication path was established, the issue shifted to how to create the scenes that would be viewed in the public demonstration experiment. This was discussed carefully with NTT that handled the network storage/resource management technology. We called this the demo scenario. In conducting a large-scale demonstration experiment network, the significance of the elemental technologies would be diminished unless we create a demo scenario that showed all the elemental technologies actually in function. The executed demo scenario consisted of the reservation of the image and its control including the storage management equipment, the protection including the node device image, the cooperation with the NICT Optical Packet and Circuit Integrated Network, and the reserved distribution of SHV.The demo experiment was conducted at the 3rd Vertically Integrated Center for Technologies of Optical Routing toward Ideal Energy Savings (VICTORIES) Symposium held on August 25, 2010. Table 2 shows the flow of the demo scenario. The network was configured so all the elemental technologies would cooperate and be presented in about 30 minutes. Looking at both the demo scenario and Fig. 3, in Demo 1, it was demonstrated that the content request from viewer A-1 and A-2 were answered based on the network storage integrated resource management, and the HD video was transmitted with the optimization of the server in which the contents were stored and the optical path that linked to the viewer. In Demo 2, in addition to the format for distributing contents D in server D as requested by viewer C via the dynamic wavelength resource manager, the protection action in case of transponder failure was demonstrated. In Demo 3, it was confirmed that the SHV video information could pass heterogeneous networks without any problem, by setting the optical path including the silicon photonics switch and long-distance transmission and by estimating the SHV video request from viewers B and D. Figure 5 shows the actual open demonstration. The three small monitors shown in the center corresponds to viewers C, A-1, and A-2 from left. The large screen on the right of the three small monitors is the network storage integrated resource management screen. 6 Evaluation of the results and future developmentsIt was confirmed in the experiment that all of the elemental technologies cooperated using the demo scenario of subchapter 5.2. The three points mentioned in chapter 3 were confirmed: A) to execute the multiple communication rates on the network, to manage them on the network, and to distribute the contents by switching the network according to the requested service; B) to check that the communication can be established by compensating the nonlinear responses from the field optical fiber, and to check that the different networks configured by different elements can be mutually connected; and C) to achieve low power consumption.The power consumption measurement of the specific network nodes was conducted while in function, and Fig. 6 shows the measured and the projected values. Assuming that the switch ports and nodes were set up for the same number of devices used in the demo experiment using the core router, it was Fig. 5 Open demo experimentTable 2. Demo scenario and elemental technologiesFig. 4 Layout of the Akihabara site(b), (c), (d), (e), (f),(g), (j), (k), (l), (m), (o)Demo 3: SHV video distribution by reservation (NHK), dissimilar network connection, silicon optical switch, tunable dispersion compensation(b), (c), (d)NICT Demo: Optical Packet and Circuit Integrated Network(e), (h), (i), (j)Demo 2: Protection (next-generation ROADM technology)(a), (e), (j), (n), (p)Demo 1: Reservation of the video and its control including the storage management deviceAbout 30 minElemental technologiesDemo scenarioD(8K)MonitorE(8K)MonitorMonitorNetworkTo: strage roomPCNHK3NHK1TableTableTable 1Table 1Table 2Table 2NiCTTable 4NHK4#3b(II)(I)#4Monitor BMonitor E(8K)Monitor E(8K)CMonitorA-1, A-2MonitorServer BFUJITSU(SW)AIST(SW)Server A, D, S#3a#2#1AIST(WC)NEC(10G)(43G)AISTServer Cand(SHV)NHKDoor64006400


page 43