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Programmable variable delay lines have been developed, so as to delay packets in variable durations by combining several lengths of FDLs in optical packet switch. In practice, two-stage switch with this programmable variable delay lines has been proposed. This switch has two buffers. One is the programmable variable delay lines (look-ahead buffer). The other is the fixed FDLs that re-input a packet...
In Multiple Fibers Optical Packet Switched (MF-OPS) networks, multiple data on one wavelength can be transmitted over multiple fibers. Therefore, it is important to consider the multiple fibers' resources in wavelength assignment problem. This paper focuses on this problem and proposes a wavelength assignment method smoothing available fiber resources for MF-OPS networks. As a result, the paper clarifies...
Matrix type high-speed optical packet/burst switch is developed that shares high-cost devices for contention avoidance, such as tunable wavelength converters (TWCs) or fiber delay lines (FDLs). In such kind of architectures, there is a technical issue that an overloaded flow causes not only high packet loss probability of itself but also higher packet loss probabilities of other normal flows. We propose...
In OPS networks, the contention resolution is one of the main problems. To reduce these contention events, we aim the effective use of wavelength resources with a routing and wavelength assignment method. In addition to this, the collision avoidance devices, such as wavelength converters, can improve the network performance more flexibly. The proposed method focuses on not only how to assign route...
Optical switching node with a high-speed matrix optical switch that shares high-cost devices for contention avoidance, i.e. tunable wavelength converters (TWCs) or fiber delay lines (FDLs), is developed. However, a quantitative performance hadn't been evaluated enough so far since mainly small-scale prototype switch was developed and the operation verification by the basic experiment was done. In...
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