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This paper describes the implementation and evaluation of layer-1 bandwidth-on-demand (BoD) capabilities in the Japanese academic backbone network, called SINET3. The network has a nationwide GMPLS-based layer-1 platform and provides reservation-based and signaling-based BoD services. The overall architecture for providing BoD services including its capabilities, user interface, path calculation,...
This paper describes the network design and configurations of the new Japanese academic infrastructure, called SINET3, which provides a rich variety of network services to more than 700 universities and research institutions. Since the start of full-scale operations in June 2007, the network has expanded its services to include multi-layer transfer services (IP, Ethernet, and layer-1), enriched virtual...
A Time-to-Digital-Converter (TDC) is to measure the interval time between two signals, and its time resolution of several pico seconds is achieved when it is implemented with advanced CMOS process [1-5]. Its applications are gradually expanding such as a phase comparator of all-digital-PLL, a sensor interface circuit, modulation circuit and demodulation circuit as well as a TDC-based ADC. The TDC...
This paper describes a new architecture for high-resolution digital PWM (DPWM) generator used in digitally-controlled DC-DC converters, PWM time resolution is determined by the difference between two (or more) gate delays, while that of conventional DPWM circuits is determined by gate delay itself. The proposed DPWM circuit can achieve fine time resolution with small circuits, and has low power consumption...
This paper proposes a novel traffic engineering technique for layer-1 bandwidth on demand service; it offers flexible resource allocation and path provision. Evaluation results in a real network are reported.
We propose service parameters, architectures to provide them, pricing policies and a heuristic route-reservation algorithm for a network providing bandwidth reservation services. Bandwidth reservation services allow users to choose or assign service parameters with which users' requirements are satisfied. We classify the parameters by bandwidth reservation contents (ex. video conference, streaming)...
We propose a heuristic routing and reservation algorithm for networks providing reservation services. Important requirements of a reservation service network are to increase network resource utilization, to provide routes satisfying specified levels of quality of service (QoS), and to minimize service interruption under the situation that it is difficult to tell exactly when, how many, and what kinds...
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