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NICT REPORT 9proximately 0.1 mm2, allowing it to simulta-neously receive multi-channel optical sig-nals and convert each of them into a high-speed electrical signal of 10 GHz or higher. The development of this device has made it possible to concentrate a large number of photodetectors into a small area, resulting in a drastic reduction of the size and power consumption of large-ca-pacity optical communication devices. This result was selected for ECOC2017.Automatic virtual network config-uration and control technologyIn the 5G era and beyond, networks will have the capability of instantly configuring virtual network slices with enough network and computing resources for different types of network services. For the agile provision-ing of network services and their adapta-tion to traffic fluctuations, we need technol-ogy for the automatic configuration and control of virtual network slices. Meanwhile, service function chaining (SFC) is an inno-vative approach to in-network processing of traffic, which enables flexible deployment of network service functions on each slice(Fig.5). We have been researching and developing technologies to automate the dynamic arbitration and migration of com-putational resources among multiple ser-vice function chains deployed on multiple virtual network slices. These technologies can mitigate the service degradation caused by CPU-saturation and/or switch-ing of communication paths. We have de-signed a mechanism for autonomic com-putational resource control to satisfy diverse quality-of-service requirements in response to network traffic fluctuations, and we have verified that our mechanism can reduce CPU-saturation in all service function chains by at least 90% compared with the con-ventional fixed resource allocation ap-proach, thereby contributing to the en-hancement of service quality. These results were presented at IEEE/IFIP Network Op-erations and Management Symposium (NOMS2018), which is a prominent inter-national conference in the field of network operations and management.Efforts leading to social imple-mentationUsing the radio-over-fiber technology and optical and electrical high-frequency conver-gent device technology, we are continuing with a verification trial of an airport runway monitoring radar system (Fig.6) at Narita Air-port, and we are collecting radar observation data for future commercial development. We have also promoted this system with the aim of creating new business and have contrib-uted to the start of testing at Kuala Lumpur Airport in Malaysia.Fig.2 : 3-mode optical ber transmission systemFig.3 : Ultra-compact, highly integrated two-dimensional photodetector arrayFig.4 : "Uninterrupted" ber-wireless communication technology for high-speed railwaysFig.6 : Foreign Object Debris Detection SystemFig.5 : Automatic Resource Arbitration among Multiple Service Function Chains Research and Development