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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...
With the development of various radio communication systems in recent years, spectrum sharing in heterogeneous networks has received a considerable amount of research attention for the efficient use of spectral resources, as the lack of these has emerged as an important problem. Prevalent spectral sharing methods focus on improving total throughput, and ignore lower throughput along the cell edges...
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...
There has been increasing demand for high-reality video systems. Thus, there has been research and development into ultra-high-definition television (UDTV) schemes for the next-generation television broadcasting system called “Super Hi-Vision” (SHV). This system aims to improve viewing experience using higher-resolution pictures. A pixel count of 7680×4320 and frame rate of 120fps are defined as full-spec...
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