Presentations

In this paper a novel distributed wavelength allocation scheme considering the four wave mixing (FWM) in all optical network is proposed. A main feature of the proposed scheme is that wavelengths are allocated by the wide interval as much as possible with considering wavelength usage condition of each link. Allocated wavelengths are calculated by a proposed expression wavelength intervals. Because of keeping the wide wavelength interval, the propose scheme can avoid using adjacent wavelengths and, can restrain generation of FWM. Evaluation results of the blocking probability are presented. It is indicated that the proposed scheme can improve the blocking probability values.

As increasing Ethernet service users and enhancing service functions, a next generation wide area layer2 network beyond the state-of-the-art carrier grade Ethernet is expected. For realizing the next generation layer2 network (NGL2), we have proposed new layer2 protocol technologies based on Ethernet technologies and have developed elemental functional systems. In this article, a newly developed NGL2 prototype system is reported. The prototype system provides an in-band message communication channel (IMCC) function, Mac-in-Mac frame transport mechanism, and GMPLS based layer2 path control functions.

In next generation network, a high level reliabilty is strong required. In a protection, which is the one of network survivable technology, it is important to use a link-disjoint paths pair of lowest total cost in a view of network resource efficiency. However, the link-disjoint paths pair calculation is NP Complete and it takes great investment of time. In order to solve this problem, we propose a high-speed method of link-disjoint paths pair calculation based on parallel reconfigurable processor. Our proposed method calculates and finds all paths in network from all network link patterns, and then calculates all link-disjoint paths pairs and selects optimal solution. A parallel execution and data flow execution enable our propose to high-speed calculations. A two performance evaluation results show that our proposed method improves calculation time more than 20 times compared to conventional optimal link-disjoint paths pair calculation algorithm.

The Internet has been popular recently, and network traffic of the Inter net is growing. The power consumpution is an issue. The large part of power consumption in network equipments is consumed in idle time, so Ehternet interface rate changes on needs. However, optical interface rate can’t change because of technical reason. The approach to sleep port itself is needed. We proposed a network reconfiguration algorithm for reducing power consumption. Network is used minimum set of link which can transfer all communication traffic load. Our proposal is not heuristic, but can obtains optimized solution.

Today, advanced network architectures like NGN are growing rapidly. These network architectures realize active bandwidth control from network application. Bandwidth control scheme makes broadband network architecture more beneficial. In this paper, we design and implement New Generation P2P Networks based on Dynamic Path Establishment with GMPLS. We show the effectiveness of our designed advanced P2P network architecture by computation simulation. We also show that our P2P network architecture is suitable for rich contents delivery by implementation.