A5101919806- Advanced Optical Network Technologies
- Advanced Photonic Communication Systems
- Optical Network Technologies
- Software-Defined Networks and 5G
- graph theory and CDMA systems
- Coding theory and cryptography
- Network Security and Intrusion Detection
- Semiconductor Lasers and Optical Devices
- Cloud Computing and Resource Management
- Advanced Computing and Algorithms
- Wireless Communication Networks Research
- IoT and Edge/Fog Computing
- Network Traffic and Congestion Control
- Caching and Content Delivery
- Interconnection Networks and Systems
- Energy Efficient Wireless Sensor Networks
- Distributed and Parallel Computing Systems
- Optical Wireless Communication Technologies
- Software System Performance and Reliability
- Opportunistic and Delay-Tolerant Networks
- Collaboration in agile enterprises
- Elevator Systems and Control
- Network Time Synchronization Technologies
- Graph Labeling and Dimension Problems
- Advanced MIMO Systems Optimization
National Institute of Information and Communications Technology
2014-2024
Keio University
2004-2019
Benchmark Research (United States)
2019
National Institute on Consumer Education
2015
Ritsumeikan University
2010
Machine learning has the capability to provide simpler solutions complex problems by analyzing a huge volume of data in short time, for adapting its functionality dynamically changing environments, and predicting near future events with reasonably good accuracy. The 5G communication networks are getting due emergence unprecedentedly number new connected devices types services. Moreover, requirements creating virtual network slices suitable optimal services diverse users applications posing...
We present results from the first demonstration of a fully integrated SDN-controlled bandwidth-flexible and programmable SDM optical network utilizing sliceable self-homodyne spatial superchannels to support dynamic bandwidth QoT provisioning, infrastructure slicing isolation. Results show that SDN is suitable control plane solution for high-capacity flexible network. It able provision end-to-end requests according user requirements, considering unique characteristics underlying infrastructure.
We developed novel integrated optical packet and circuit switch-node equipment. Compared with our previous equipment, a polarization-independent 4 × semiconductor amplifier switch subsystem, gain-controlled amplifiers, one 100 Gbps transponder seven 10 path transponders Gigabit Ethernet (10GbE) client-interfaces were newly installed in the present system. The amplifiers can provide more stable operation without equipment adjustments for frequent polarization-rotations dynamic packet-rate...
An optical packet and circuit integrated network (OPCInet) provides both high-speed, inexpensive services deterministic-delay, low-data-loss according to the users' usage scenarios, from viewpoint of end users. From service providers, this large switching capacity with low energy consumption, high flexibility, efficient resource utilization a simple control mechanism. This paper presents recent progress made in development OPCInet its extension software-defined networking (SDN). We have...
In this paper, we describe an autonomous distributed control system that have been developing for optical packet and circuit integrated network, experimentally evaluate its performance. Colored (i.e., multi-wavelength) packet-switched links transfer both signals switching (e.g., signaling routing) best-effort data. We successfully transmitted high-definition uncompressed real-time video on two lightpaths established by our without degradation of quality, simultaneously with other data...
We newly developed a 3 × integrated optical packet and circuit switch-node. Optical buffers burst-mode erbium-doped fiber amplifiers with the gain flatness are installed in The buffer can prevent collisions decrease loss. constructed multi-ring network testbed connecting two single-ring networks client by For first time, we demonstrated 244 km transmission 5-node hopping of multiplexed 14-wavelength 10 Gbps paths 100 packets encapsulating Gigabit Ethernet frames on testbed. Error-free (frame...
5G communication networks will be complex due to the emergence of an unprecedented huge number new types connected devices and services. Moreover, on-demand creation virtual network slices, each suitable for a different application, is posing challenges efficient management resources, while optimally satisfying quality service requirements in time-varying workloads conditions. This article, which tutorial nature, introduces slices (from point view non-wireless part network) elaborates...
We present the first elastic SDM and multi-granular network based on two 7-core MCF links four programmable optical nodes able to switch traffic utilising space, frequency time dimensions with over 6000-fold bandwidth granularity.
The next generation communication networks are going to be composed of virtualized node and link resources, which can divided into various slices. Different virtual network slices configured with different amounts resources so that each slice able optimally satisfy the quality service requirements given category Internet Things services. Virtualized resource allocated dynamically adjusted adapt capability varying workload. In this article, we present our ongoing research on autonomous...
Service function (SF) chaining enables network operators and infrastructure providers to flexibly orchestrate virtualized functions (NFs) at various places on software defined virtual networks. Meanwhile, with the rapid prevalence of Internet-of-Things (IoT) applications mobile services, quality-of-service (QoS) requirements are getting increasingly diverse traffic volume pattern varying rapidly. The time-varying requires provider dynamically adjust appropriate amount computational resources...
Optical packet and circuit integrated (OPCI) networks provide both optical switching (OPS) (OCS) links on the same physical infrastructure using a wavelength multiplexing technique in order to deal with best-effort services quality-guaranteed services. To immediately respond changes user demand for OPS OCS links, OPCI should dynamically adjust amount of resources each link. We propose resource-adjustable hybrid packet/circuit switch transponder. also verify that distributed control resource...
This paper presents and experimentally demonstrates the generalized architecture of Openflow-controlled optical packet switching (OPS) network. Openflow control is enabled by introducing Openflow/OPS agent into OPS network, which realizes protocol translation message exchange between plane underlying nodes. With software-defined networking (SDN) technique, complex functions conventional network can be offloaded a centralized flexible plane, while promoted operations provided due to...
We propose a novel wavelength resource reconfiguration system with selective switch (WSS) and our unique burst-mode erbium-doped fiber amplifier (BM-EDFA) for dynamic agile new-generation optical networks such as an elastic network. The can concurrently establish or remove multiwavelength channels, while preserving the stability. In conventional system, processing time is increased in proportion to number of reconfigured channels because each channel sequentially established removed. On...
Artificial intelligence (AI) and machine learning (ML) techniques are becoming essential to automate the control management of complex systems, such as 5G future networks services, through collection timely processing a large amount data from system. The standardization activities AI/ML integrated network architectures frameworks have recently been progressing in various standards developing organizations (SDOs). This article provides detailed survey International Telecommunication Union. An...
We have proposed the concept of an optical packet and circuit integrated network to provide service diversity, energy efficiency a simplified control mechanism toward new generation networks. In this network, data packets on lightpaths are transmitted common physical resources for efficient resource use. addition, path signaling lightpath setup release thorough switch block is implemented. set up primitive including one switching node packet/path transceiver. demonstrate 80 (8λ × 10) Gbit/s...
Service function chaining (SFC) enables network operators to flexibly provide diverse services such as Internet-of-Things (IoT) and mobile applications. SFC technologies are required offer stable guaranteed quality-of-service (QoS) even in the circumstances of dynamically-changing resource demands traffic volumes. To meet QoS requirements against time-varying environment, infrastructure providers need dynamically adjust amount computational resources CPU assigned virtual functions (VNFs)...
Recently, the open radio access network (O-RAN) architecture has been expected to enhance both openness of components and intelligence control functions as a promising RAN for Beyond 5G (B5G)/6G networks. Meanwhile, power consumption base stations (BSs) in is serious problem that needs be addressed owing recent increase service types such 4G-LTE, 5G, local it will more remarkable future B5G era. However, conventional experiences energy wastage because turns on all BSs at times, even coverage...
We propose spectral phase-encoded optical atmospheric (OA) code-division multiple-access (CDMA) systems with pulse-position modulation (PPM) and theoretically analyze the bit error rates (BERs). compare BERs of proposed system to those time-encoded OA-PPM-CDMA at same rate chip rate. show that, even if is equipped no mitigation techniques multiple access interference (MAI) scintillation, achieves lower than both systems, without a technique MAI/scintillation, due its higher code spreading...
Limitations are found in the recent Internet because a lot of functions and protocols patched to original suite layered without considering global optimization. This reveals that end-to-end argument was neither sufficient for current societal network nor sustainable future. In this position paper, we present design guidelines future network, which call New Generation Network, provides inclusion diverse human requirements, reliable connection between real-world virtual space, promotion social...
We develop an integrated optical packet and circuit switching node in which signaling via is implemented. demonstrate 80 (8λ × 10) Gbit/s with <;1E-4 packet-loss-rate, 8-lightpaths establishment, dynamic wavelength-resources control.
We partially implement and experimentally evaluate an integrated optical path/packet node toward new-generation networks. Our own OCS control system successfully performs both dynamic changes of lightpath resources establishment/release within total approximately 6000ms.
We present an SDM-WDM hybrid add-drop network node compatible with SDM-based self-homodyne transmission. OSNR penalties were less than 0.7 dB, but net spectral efficiency was slightly sacrificed.
We have experimentally demonstrated Openflow-controlled optical packet switching network, while also proposed and an advanced Openflow control mechanism to handle the network dynamics with prompt response.
In this paper, we propose a method for automatic virtual resource allocation by using multi-target classification-based scheme (MTCAS). our method, an Infrastructure Provider (InP) bundles its CPU, memory, storage, and bandwidth resources as Network Elements (NEs) categorizes them into several types in accordance to their function, capabilities, location, energy consumption, price, etc. MTCAS is used the InP optimally allocate set of NEs Virtual Operator (VNO). Such will be subject some...