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When designing network topology, we need to simultaneously consider multiple criteria, such as network cost and reliability. Therefore, the author applied the analytic hierarchy process (AHP) to network topology evaluation. However, the time required to construct a candidate topology set drastically increases as the network scale grows. So, the author proposed an efficient method for constructing...
When a link or node failure occurs in a network, flows are detoured and therefore the hop counts of the flows increase. This increase could drastically deteriorate the quality of a network. The flow hop length stability as well as network connectivity is important for network reliability. We investigate a network design method that improves stability and connectivity of a network during a failure...
Network topology seriously affects network cost, path length, distribution of link load, and reliability, for example, so we need to consider these multiple criteria with different units simultaneously when designing network topology. The analytic hierarchy process (AHP) is a way to make a rational decision considering multiple criteria. Using AHP, we can reflect the relative importance of each criterion...
When a link or node failure occurs, flows are detoured around the failed portion, so the hop count of flows could change dramatically as a result of a failure. It is therefore important to evaluate the reliability of backbone networks from the viewpoint of flow hop length stability as well as network connectivity. In this paper, we analyze the possible primary causes of the degradation of reliability...
Although an AWG-based single-hop WDM network is a desirable architecture to achieve an all-optical packet network in MANs, scalability is a problem. This problem can be solved by providing optical couplers between the AWG and other nodes and collecting multiple nodes. In this case, packet collisions at couplers will significantly increase the packet network delay. Therefore, the author proposed to...
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