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In recent years, as higher performance terminal equipments are spread, the amount of mobile data traffic is growing rapidly by using popularization of streaming services in wireless networks. To overcome this situation, it is considered that Access Points (APs) are deployed densely for capacity improvement. In such an environment, virtualization is a possible technique to use multiple APs efficiently...
In recent years, the number of requests to transfer large files via large high-speed computer networks has been increasing rapidly. Typically, these requests are handled in the “best effort” manner and resulting in unpredictable completion times. In this paper, we consider a model where a transfer request either must be completed by a user-specified deadline or must be rejected if its deadline cannot...
To deal with exponential traffic growth, Elastic Optical Networks (EONs) are necessary because they enable to provide large capacity transmissions. In EONs, multiple widths of spectra are assigned to optical paths. Therefore, fragmentation in frequency domain degrades network performance. We propose a spectrum allocation method to reduce blocking probability and node costs, especially in spatially...
As growing the size of digital contents, it is harder to predict the completion time of file transfer. This is an important problem particularly in a data migration at cloud computing. Therefore, some bandwidth assignment methods have been proposed in a model where a transfer request either must be completed by a specified deadline or must be rejected if the deadline cannot be satisfied. However,...
We propose novel optical node architecture based on the Architecture on Demand concept with sophisticated spectrum and core allocation in Multi-Core Fiber Elastic Optical Networks. More than 85% of flexible spectrum selective switches can be reduced by replacing fixed-grid MUXs/DEMUXs.
To guarantee the quality of service is one of the most important problems in ICT (Information Communication Technology) area. Therefore, we had proposed a service platform which integrates service control and network control by componentization of distributed objects. On the other hand, with advances of wireless communication technologies, users eager to have network services with a mobile terminal...
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