Kabushiki Kaisha Toshiba

Mutsumu Serizawa

Koji Ogura

Minoru Namekata

Nobuyasu Nakajima

Takashi Wakutsu

Manabu Mukai

Kiyoshi Toshimitsu

Eiji Kamagata

Katsuya Nounin

Tomoko Adachi

Tsuguhide Aoki

Shuichi Obayashi

Ren Sakata

Hiroki Shoki

Hiroshi Tsurumi

Syuichi Sekine

Takafumi Sakamoto

Katsumi Sakakibara

Osamu Moriya

Ryoko Matsuo

Masahiro Takagi

Yoshinari Kumaki

Kazuhiro Kawashima

Keiji Tsunoda

Noriyasu Kato

Tsutomu Sugawara

Kumiko Nakakita

Takeshi Tomizawa

Daisuke Takeda

Yuji Umemoto

Naritoshi Saito

Eiichi Watanabe

Tomohiro Matsuda

Takahisa Hayashi

Junzo Murakami

Shuji Hirakawa

Kaoru Tatsumi

Naohide Kushige

Hideo Kikuchi

Tokihiko Yokoi

Shinichi Suizu

Katsuya Noujin

A large amount of user information is transmitted with good efficiency by means of a high-speed downlink by making transmission rates of an uplink circuit and a downlink asymmetrical. The radio communication system includes a plurality of base stations, a plurality of terminals, an uplink established between each of the base stations and each of the terminals for the purpose of radio transmission of prescribed information from a terminal to a base station, and a downlink circuit established between each of the terminals and each of the base station for the purpose of radio transmission of prescribed data from a base station to a terminal. This radio communication system has a low-speed transmitting means, provided at the terminal, which transmits a radio signal at a relatively low transmission rate to an above-noted base station via the above-noted uplink, a low-speed receiving means, provided at the base station, which receives a radio signal sent at a relatively low transmission rate from the terminal via the uplink, a high-speed transmitting means, provided at the base station, which transmits a radio signal at a relatively high transmission rate to an above-noted terminal via the above-noted downlink, and a high-speed receiving means, provided at the terminal, which receives a radio sent at a relatively high transmission rate from the base station via the downlink.

Radio terminal for a radio communication with a base station

Radio terminal for a radio communication with a base station and method

Radio communication method including SDL having transmission rate of relatively high speed

Radio communication system including SDL having transmission rate of relatively high speed

Method of performing a radio communication between a radio terminal and a base station

Base station for a radio communication with a radio terminal and method

Base station for a radio communication with a radio terminal

A wireless communication system which transmits and receives a signal by using a plurality of wireless apparatuses, comprising: a first wireless apparatus group having a plurality of transmitting apparatuses, each transmitting a wireless signal based on a first control signal, said first wireless apparatus group forming a first ad-hoc network between said transmitting apparatuses; and a second wireless apparatus group having a plurality of destination apparatuses, each receiving the wireless signal transmitted from said first wireless apparatus group, said second wireless apparatus group transmitting and receiving the wireless signal received by said destination apparatuses based on a second control signal, and said second wireless apparatus group forming a second ad-hoc network between said destination apparatuses different from said first ad-hoc network.

Wireless communication and wireless communication apparatus

One of objects of a wireless communication apparatus according to the present invention is to realize stable communication regardless of received signal strength indication and information amount. The wireless communication apparatus for communicating in an autonomous distributed wireless network includes a detection unit which generates a detection signal by detecting a first wireless signal from a first wireless apparatus; a wireless circuit which receives a second wireless signal relating to said first wireless signal, transmitted from a second wireless apparatus which received said first wireless signal; a signal estimation unit which estimates said detection signal and the received second wireless signal; a signal selector which selects either said detection signal or the received second wireless signal, based on an estimation result of said signal estimation unit; and a demodulator which demodulates the signal selected by said signal selector.

Wireless communication apparatus and method of wireless communication

A radio communication apparatus compatible with a plurality of communication systems and application services comprises a radio transmitting/receiving unit for transmitting and receiving a radio signal, signal processing circuit for executing part of digital signal processing which may be executed when a radio signal is transmitted or received, first processors connected to the signal processing circuit for at least executing communication control related to connection between the radio communication apparatus and the communication systems, and an application program related to the application services, and second processors connected to the signal processing circuit for at least executing another part of the digital signal processing, and control of the signal processing circuit, the amount of processing of the second processors being greater than the amount of processing of the first processors, the processing concerning the executing unit.

Radio communication apparatus and method

A communication scheme for improving the performance of communications utilizing the transport layer connection provided via a radio network, by enabling a control of the transport layer connection according to the radio communication state and property of the radio terminal, without changing implementation of the transport layer of a terminal connected to a wire network. The gateway device is provided with a control unit for controlling a connection in the radio transport layer protocol according an information regarding a radio communication state of the radio terminal device, where the information regarding the radio communication state of the radio terminal device is notified from either a radio base station device covering a radio service area in which the radio terminal device is located or a home location register for carrying out at least registration and management of the radio terminal device.

Scheme for adaptive control of transport layer connection in communications via radio and wire networks

Growing community of inventors

Tokyo, Japan

Mutsumu Serizawa