Y
Yukio Nakano
Researcher at Hitachi
Publications - 131
Citations - 2864
Yukio Nakano is an academic researcher from Hitachi. The author has contributed to research in topics: Signal & Node (networking). The author has an hindex of 26, co-authored 131 publications receiving 2863 citations. Previous affiliations of Yukio Nakano include Nippon Telegraph and Telephone.
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Patent
Multimedia bidirectional broadcast system
TL;DR: In this paper, a multimedia bidirectional broadcast system including a broadcast station (115) and subscriber terminals (116) is presented, which includes a main control unit (106) having therein a data base control table (134) in which program and commercial down load sequences are recorded depending on a setting effected by a subscriber, a motion picture pro-gram data base (102), a commercial data base(131), a program transmitter (103) for effecting accesses and transmissions of transmission programs onto transmission lines, and an asynchronous transfer mode exchange (109) for delivering
Patent
Communication network system and method of controlling a communication network
Akihiko Takase,Masahiro Takatori,Yoshiaki Takemura,Naoya Kobayashi,Yasushi Sawada,Yukio Nakano,Takahashi Yasushi,Masahiro Koya,Yoshitaka Takasaki +8 more
TL;DR: In this article, the communication performance prerequisites for a communication message are discriminated in the node which receives the message and future traffic in the various routes is predicted on the basis of the information on the continually measured traffic by the use of a predetermined algorithm and stored in a database storage unit for use in determination of routes for communication messages.
Patent
Database management system and method for query process for the same
TL;DR: In this paper, a database management system for executing database operations in parallel by a plurality of nodes and a query processing method for it are described, which contains a decision management node for deciding a distribution node for retrieving information so as to analyze a query received from an application program, generate a processing procedure for processing the query, and execute the process and a join node for sorting, merging, and joining the information retrieved by the distribution node.
Patent
Optical fiber transmission system and supervision method of the same
Hideaki Tsushima,Shinya Sasaki,Yukio Nakano,Hiroyuki Nakano,Ryoji Tateyari,Hironari Matsuda,Kenji Tomooka,Naohiro Sakakida,Shin Nishimura,Yoshihiro Yano,Youichi Igarashi,Satoshi Aoki,Masahiro Takatori,Tohru Kazawa,Yoshihiro Ashi +14 more
TL;DR: In this article, an optical repeater for realizing transmission of supervisory information of an optical fiber transmission system without the output power of the optical fiber amplifier being reduced, where a supervisory optical transmitter and an optical receiver with a wavelength which is similar to the wavelength of the pumping light source of the Optical Fiber Amplifier are mounted, and on the input side of the Optic repeater, pumping light is multiplexed in the forward direction and a super-visory optical signal, which is transmitted in wavelength and transmitted, is demultiplexed simultaneously by the first wavelength