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Nguyen Thanh Cong,Yusuke Hirota,Hideki Tode,Koso Murakami 한국멀티미디어학회 2009 한국멀티미디어학회 국제학술대회 Vol.2009 No.-
Optical WDM networks have been studied as future promising networks for high quality multimedia services like forthcoming 8K super high definition video applications. In extremely higher data rate transmission systems like 160Gbps ones, physical impairments degrade optical signal more seriously. We especially pay attention to Polarization Mode Dispersion (PMD) which is the typical physical impairment. In this paper, we propose a new routing method for multi-fiber WDM networks that reduces influence of physical impairments and makes loss probability improve. Its performance is evaluated by computer simulations.
P2P Live Streaming System for Stable and High Quality Distribution
Takayuki Hisada,Shusuke Yamazaki,Yusuke Hirota,Hideki Tode,Koso Murakami 한국멀티미디어학회 2009 한국멀티미디어학회 국제학술대회 Vol.2009 No.-
With the appearance of P2P live streaming distribution services, load of distributor is reduced. In existing systems for business services, however, transmission load of distributor still remains in high level to improve robustness. Thus, it is difficult for content distributors to reduce load of his node. This paper presents and evaluates P2P live streaming system suitable for private distribution in which a distributor node has insufficient performance. In this system, a set of the selected broadband nodes provide contents to peers instead of Origin with large amount of transmission bandwidth. As a result, this P2P system considering transmission bandwidth of each node is expected to achieve the private distribution.