Hitachi, Ltd.

Shiseido Company, Limited

Hitachi Communication Technologies, Ltd.

Hitachi Advanced Systems Corporation

Toru Okamoto

Mikio Kuwahara

Kenzaburo Fujishima

Masanori Taira

Koji Meguro

Masahiro Takatori

Yuichi Yamaguchi

Masaki Ohira

Makoto Takahashi

Yoshikazu Soyama

Hiroyuki Kakoki

Ryuji Ishii

Hideo Nakajima

Shoji Nishiyama

Satoshi Tomomasa

Motokiyo Nakano

Toshiyuki Atsumi

Yoshiyuki Ogusu

Tomohiro Mori

Kentarou Watanabe

To provide a wireless base station comprising an array antenna which transmits packets to terminals, a packet scheduler which determines transmission sequence of the packets, a modulator which generates modulated signals based on the packets, and a beam former for transmission signal which multiplies the packets with array weights for transmission signal and outputs the transmission signal to the array antenna the beam former for transmission signal comprises a memory which stores the array weights for transmission signal associated with the terminals' IDs. The beam former for transmission signal receives the IDs of selected terminals from the packet scheduler, refers to the memory, and selects the array weights for transmission signal by the IDs of the terminals.

Wireless base station using weighting elements of an array antenna

A radio communication apparatus enhances cell throughput by adaptive selection of spatially multiplexed channels in consideration of interferences in a local cell and reducing load for calculation of array weights by storing them in advance as fixed values and outputting fixed beams. To reduce the calculation load for the adaptive selection of spatially multiplexed channels that takes interferences within the local cell into consideration, the radio communication apparatus adopts a packet scheduling method that selects a combination of fixed beams and determines the number of spatially multiplexed channels, based on the fixed beams for mobile apparatuses with packets waiting to be transmitted and pre-calculated correlative quantities of inter-beam interferences between these fixed beams.

Radio communication apparatus and packet scheduling method

An optical transmission network allows transmission monitoring zones to be set up or changed in a flexible manner, and allows simultaneous monitoring of communication quality for each of these monitoring zones. Also, provided is an optical transmission zone service provider that varies user fees according to communication quality in the used zones.

Method and apparatus for optical network administration

An oil-in-water type emulsion composition comprising: an amphiphile and a surfactant selected from the substances which can form a gel in an amphiphatic substance-surfactant-water system at a temperature of not lower than ordinary temperatures; oil and water, wherein substantially the total amount of amphiphile and surfactant exist on the boundary surfaces of emulsion particles. The emulsion composition has both the physical properties close to those of an aqueous solution and a creamy feel at the time of use.

Oil-in-water type emulsion composition

Nail cosmetic composition

Growing community of inventors

Yokohama, Japan

Toru Okamoto