Kabushiki Kaisha Toshiba

Noriyasu Kato

Hiroyuki Kobayashi

Eiji Kamagata

Keiji Tsunoda

Yoshinari Kumaki

Masahiro Takagi

Atsushi Inoue

Toshio Okamoto

Shigeo Matsuzawa

Naohisa Shibuya

Takeshi Saito

Hirokazu Tanaka

Yusuke Takahashi

Mutsumu Serizawa

Yasuro Shobatake

Osamu Moriya

Kumiko Nakakita

Miwako Doi

Ichiro Tomoda

Katsuya Nounin

Kiyotaka Matsue

Yutaka Sata

Youichirou Shiba

Yohei Hattori

Hiroaki Ito

Naoto Seto

Takuya Futagami

Jota Suzuki

Katsuya Noujin

Yasur0 Shobatake

Yoshiaki Yamasaki

Kazutoshi Horiguchi

Masahiro Horie

Yoshiki Mashima

A wireless communication equipment system which performs wireless communication among one master station and more than one slave station is configured so that each of the slave stations requests the master station to reply acknowledgement frames so as to perform transmission acknowledgement to broadcast frames or multicast frames transmitted from the master station. The master station is configured to decide order of replies of the acknowledgement frames of the slave stations which have requested the replies of the acknowledgement frames and to notify the order of the replies of the acknowledgement frames.

Wireless communication equipment system for wireless local area network communication, and wireless communication sequence for the system

In the disclosed information delivery scheme for delivering WWW information provided by information servers on the Internet to mobile computers connected to the Internet through a wireless network, a plurality of cache servers capable of caching WWW information provided by the information servers are provided in association with the wireless network. The cache servers can be managed by receiving a message indicating at least a connected location of a mobile computer in the wireless network from the mobile computer, selecting one or more cache servers located nearby the mobile computer according to the message, and controlling these one or more cache servers to cache selected WWW information selected for the mobile computer, so as to enable faster accesses to the selected WWW information by the mobile computer. Also, the cache servers can be managed by selecting one or more cache servers located within a geographic range defined for an information provider who provides WWW information from an information server, and controlling these one or more cache servers to cache selected WWW information selected for the information provider, so as to enable faster accesses to the selected WWW information by the mobile computer.

Scheme for information delivery to mobile computers using cache servers

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

A mobile supporting router device for realizing the handoff control associated with the moving in high speed is forms by at least one first interface connected with radio base stations, each capable of accommodating at least one mobile terminal; at least one second interface connected with a wire network; an information exchanging unit for exchanging a routing protocol on a network layer, through the second interface; a memory unit for storing information regarding a routing on the network layer based on the routing protocol exchanged by the information exchanging unit; a transfer unit for transferring datagram through the first interface according to the information regarding the routing on the network layer stored in the memory unit; a moving detection unit for detecting a moving of the mobile terminal among the radio base stations; and an information updating unit for updating the information regarding the routing on the network layer stored in the memory unit when the moving of the mobile terminal is detected by the moving detection unit.

Router device, datagram transfer method and communication system realizing handoff control for mobile terminals

A communication node which can reliably transfer a packet with a payload including data having error resistance in radio environments is disclosed. A packet to be transmitted is divided into segments to form a plurality of packet segments. From among a plurality of error correction schemes that have been prepared in advance, the scheme to be employed is selected for each of the packet segments in accordance with predetermined criteria, and the selected error correction scheme is applied to each packet segment. Subsequently, the processed packet segment is transmitted to the network. Packet segments are received from the network. From among a plurality of error correction schemes prepared in advance, the scheme to be employed is selected for each of the received packet segments based on predetermined information contained in each received packet segment, and the selected error correction scheme is applied to the received packet segment. An original packet is formed from the plurality of processed packet segments.

Communication node and packet transfer method

A data transmitting and receiving method applied to a portable communication terminal apparatus which communicates with at least one destination and a ticket gate, the method comprising receiving a ticket information item via a public network to obtain a plurality of received ticket information items, storing the received ticket information items in a memory device, designating one of the ticket information items in the memory device to obtain a designated ticket information item, displaying the designated ticket information item on a display, establishing a first radio channel for the portable communication terminal apparatus to perform communications with the ticket gate, in preference to other communications with the destination, releasing a second radio channel which is used for communicating with the destination, before establishing the first radio channel, communicating with the ticket gate via the first radio channel on the basis of the ticket information item displayed on the display.

Data transmitting and receiving method and portable communication terminal apparatus

A highly reliable gateway device for improving the performance of communications utilizing the transport layer connection provided via a radio network, by setting up the transport layer connection between a wire terminal and a radio terminal in a form suitable for an application, or by enabling a control of the transport layer connection according to the radio communication state between the radio terminal and a base station, without changing implementation of the transport layer of a terminal connected to a wire network, is disclosed. The gateway device determines whether or not to carry out a set up of a connection in divided forms according to an information content of a packet that contains a transport layer protocol data unit requesting a set up of the transport layer connection between the radio terminal of the radio network and the wire terminal of the wire network.

Scheme for reliable communications via radio and wire networks using transport layer connection

Growing community of inventors

Kanagawa, Japan

Noriyasu Kato