Canon Kabushiki Kaisha

Nippon Telegraph and Telephone Corporation

Ntt Docomo, Inc.

Akira Kishida

Yasuhiko Inoue

Shoko Shinohara

Masato Mizoguchi

Yasushi Takatori

Riichi Kudo

Takahiro Asai

Yusuke Asai

Kenichi Kawamura

Yoshifumi Morihiro

Kengo Nagata

Hirantha Abeysekera

Takeo Ichikawa

Munehiro Matsui

Keisuke Wakao

Takatsune Moriyama

Shota Nakayama

Akiyoshi Inoki

Teruhiko Suzuki

Akira Yamada

Yukihiko Okumura

Tomoyuki Yamada

Daisuke Koizumi

A base station according to an embodiment of the present disclosure includes a generation unit () that generates a beacon including switching information () indicating whether to cooperatively use a frequency channel and a transmission unit () that transmits the beacon.

Base station, terminal apparatus, and wireless communication method

A base station () according to an embodiment includes a data processing unit () and a wireless signal processing unit (). The data processing unit () generates a MAC frame. The MAC frame includes input data and an identification bit (CB). The identification bit (CB) indicates that data is extended broadcast data. The wireless signal processing unit () converts the MAC frame into a wireless signal to distribute the wireless signal.

Utilizing wireless distribution content

A data processing apparatus () according to an embodiment includes a data processing unit () and a wireless unit (). The wireless unit receives the data converted by the data processing unit and wirelessly transmits the input data to an access point. The data processing unit converts, when a remaining amount input from a battery () is in a first state, the input data with a first setting and outputs the converted data to the wireless unit. The data processing unit converts, when the remaining amount of the battery is in a second state different from the first state, the input data with a second setting and outputs the converted data to the wireless unit. A capacity per unit time of the data after conversion is different between the first setting and the second setting.

Data processing apparatus, data processing method, and data processing program

Provided is a wireless communication system that performs priority control by setting, depending on a type of transmission data, a channel use period during which exclusive use of a channel after a right to access the channel is acquired is permitted. The wireless communication system includes a measurement unit that measures quality measurement information related to a quality of wireless communication, a parameter setting unit that makes, when a latency in transmission of a prioritized frame due to transmission of a non-prioritized frame is not expected based on the quality measurement information measured by the measurement unit, settings such that the channel use period for the transmission of the non-prioritized frame is changed to be longer, and a MAC frame generation unit that generates a MAC frame which permits continuous transmission of the non-prioritized frames within the channel use period set by the parameter setting unit.

System and method for performing priority control in wireless communication

In a random access radio communication system configured to perform downlink communication from a radio base station to radio terminals by random access, the radio terminals include one or more low latency terminals requiring low latency and one or more non-low latency terminals not requiring low latency, and the low latency terminals and the non-low latency terminals are configured to be distinguished by service set identifiers (SSIDs). The random access radio communication system includes terminal assignment destination control unit of distinguishing the low latency terminals and the non-low latency terminals in accordance with the SSIDs and evenly distributing the terminals into a plurality of communication channels, and random access control unit of performing priority control on the low latency terminals and the non-low latency terminals for each communication channel so that the downlink communication in the low latency terminal satisfies a predetermined delay time.

Random access wireless communication system and random access wireless communication method

A predetermined STA includes a station information collection unit collecting from the STA itself and other STAs station information used for selection of STAs performing simultaneous transmission and for control of the simultaneous transmission, and a simultaneous-transmission request unit knowing occurrence of a QoS data frame based on the station information and transmitting a request frame requesting the simultaneous transmission to an AP. The AP includes a station information collection unit; a simultaneous-transmission determination unit selecting a combination of the STAs performing the simultaneous transmission based on the station information by reception of the request frame; and a trigger transmission unit transmitting to each of the STAs performing the simultaneous transmission a trigger frame instructing to performs the simultaneous transmission and including information necessary for controlling the simultaneous transmission. Each of the STAs designated by the trigger frame is configured to simultaneously transmit the wireless frames to the AP.

Wireless communication system, wireless communication method, wireless LAN access point, and wireless LAN station

In user terminalof the present invention, connection-cell-selection controlling sectionmeasures reception quality of signals respectively transmitted from cells and received by antenna section, corrects the reception quality of each of the cells based on a positional relationship between each of the cells and user terminaland based on a moving direction of user terminal, and determines a connection cell for user terminal(base station in communication with user terminal) based on the corrected reception quality. This configuration lowers a cell switching frequency, while preventing degradation of throughput and the like in a future radio communication system (multilayer cellular radio network).

User terminal and cell selection method

An AP and UE, which perform access control using CSMA/CA, perform a step judging an exposed level in transmission of the AP based on a congesting level in transmission, which is caused by a wireless station in defer transmission that is in a neighborhood of the AP; a step judging an exposed level in reception of the UE based on a congesting level in reception, which is caused by a wireless station in defer transmission that is in a neighborhood of the UE; and a step performing control which changes a channel of the AP, when the exposed level in transmission cannot satisfy expected quality of the AP, and performing control which changes a connected AP of the UE, or control which changes to other network, when the exposed level in transmission or in reception cannot satisfy required quality of the UE or the expected quality of the AP.

Wireless communication system and wireless communication control method

Provided is a wireless environment evaluation method including a stepacquiring a transmission and reception history of wireless signals transmitted and received between the plurality of wireless stations and acquiring or estimating a number of wireless stations in transmission standby, based on the transmission and reception history; a stepcalculating a normal reception rate S in a congesting situation in reception according to the number of wireless stations in transmission standby; a stepacquiring a normal reception rate S' of the wireless signals per a fixed channel use time from the transmission and reception history in the prescribed wireless station; and a stepdetermining a degree of the exposed situation in reception according to a ratio of the normal reception rate S&#x2032; to the normal reception rate S.

Wireless environment evaluation method and wireless communicaton system

A first setting item regarding a function determined so that it can be used on the basis of obtained configuration information, that is, a function determined so that it can be used on the basis of received settings is displayed in selectable manner; a second setting item regarding a function determined so that it can be used on the basis of the obtained configuration information, that is, a function determined so that it cannot be used on the basis of the received settings is displayed in selectable manner if the settings are changed; and a third setting item regarding a function determined so that it cannot be used on the basis of the obtained configuration information, that is, a function determined so that it cannot be used on the basis of the received settings is displayed in unselectable manner.

Information processing apparatus, information processing method, and computer-readable medium for displaying device settings via a device setting screen

An information processing apparatus activates an installer by a basic printer driver, transmits information of an image forming apparatus to automatically install and activate a printer adaptor module, and automatically prepares a second extension printer driver, thereby achieving original bidirectional communication.

Growing community of inventors

Tokyo, Japan

Akira Kishida