Sharp Kabushiki Kaisha Corporation

Sharp Kabushiki Kaishi

Shusaku Fukumoto

Hidenobu Fukumasa

Shuichi Takehana

Katsutoshi Ishikura

Shinichi Sawada

Hirokazu Kobayashi

Shiro Sugahara

Toshiaki Kameno

Takashi Nakai

Keiji Hikoso

Yuichi Nobusawa

Yusuke Takagi

Shunsuke Araki

Takehana Shuichi

A wireless communication system is provided in which a plurality of MTC devices can connect to a base station device efficiently. Each of MTC devices in group A that transmits data to the base station device using a predetermined application format is allocated first radio resource common in group A. The MTC device transmits an access request signal to the base station device using the first radio resource. The base station device receives the request signal from the MTC device. The base station device allocates second radio resource common in group A to the MTC device. The MTC device transmits data to the base station device using the second radio resource.

Wireless communication system

A base station device includes: an information collection unit configured to collect information for calculating evaluation values for each of first, second, and third transmission paths; an evaluation value calculation unit configured to calculate the evaluation values for each of the first, second, and third transmission paths, based on the collected information; and a transmission path selection unit configured to select, using the evaluation values of each of the first, second, and third transmission paths, a transmission path to be used by a mobile communication terminal.

Wireless communication system, base station device, and wireless communication route selection method

A wireless communication system includes at least one terminal apparatus and one communication apparatus which perform communication in a plurality of frequency bands. The terminal apparatus includes: a function information storing unit which pre-stores frequency band information indicating available frequency bands among the plurality of frequency bands and the number of simultaneously available frequency bands; and a terminal control unit which reads the frequency band information stored in the function information storing unit and transmits the read frequency band information to the communication apparatus via a first wireless communication unit. The communication apparatus includes: a base station control unit which selects at least one frequency band from the plurality of frequency bands based on the frequency band information transmitted from the terminal apparatus; and a second wireless communication unit which communicates with the terminal apparatus by use of the frequency band selected by the base station control unit.

Wireless communication system, wireless communication method, terminal apparatus, and communication apparatus

A position measuring unit measures a position. An area determining unit determines a means of movement. A position measurement result transmission determining unit determines, based on the means of movement determined by the area determining unit, whether or not to transmit the position measurement result of the position measuring unit to the information-providing apparatus. A transmitting unit transmits, in the case in which the position measurement result transmission determining unit determines to transmit the position measurement result to the information-providing apparatus, the position measurement result to the information-providing apparatus.

Communication system, communication apparatus, communication method, and communication program

A base station device communicates with a mobile station device, either directly or via a relay station device. The base station device includes: a reference signal transmission instruction unit configured to instruct the mobile station device to transmit a reference signal; and a reference signal measurement instruction unit configured to instruct the relay station device to measure the reference signal that is transmitted by the mobile station device.

Base station device, mobile station device, and communication control method

A mobile station device, which communicates with a base station device, includes a control signal generator that initiates or terminates a cell search based on a reception quality value of a radio wave transmitted from the base station device, and a moving speed of the mobile station device.

Mobile station device, wireless communication system, mobile station device control method, and mobile station device control program

A CDMA complex QPSK spread modulation method and apparatus are provided, which can be operated on a reduced gate scale with reduced power consumption. Digital data signals are spread modulated by multipliers, with the first spreading codes generated from first spreading code generators, so as to produce spread modulated signals. These spread modulated signals are input to a complex QPSK processor where they are subjected to a complex QPSK operation with second spreading codes generated from second spreading code generators. The resultant signals are filtered through low-pass filters. Digital-to-analog converters convert the filtered signals into analog values. Signals including the QCH data signal are processed through multipliers so as to weight them with a gain factor G from a gain factor controller.

Growing community of inventors

Osaka, Japan

Shusaku Fukumoto