Fujitsu Corporation

Yoshiyuki Oota

Takanori Iwamatsu

Hiroaki Takashima

Masataka Umeda

Kiyoshi Miyazawa

Syuuichi Okada

Toru Imamura

An intermittent reception control apparatus controls intermittent reception in communication between a base station apparatus and mobile station apparatuses. The intermittent reception control apparatus comprising a control unit that generates DRX parameters, which are intermittent reception parameters, and transmits the generated DRX parameters to the mobile station apparatuses. Further, the DRX parameters include information on the timing at which to cause the mobile station apparatuses to enter an active state and are common to all of the mobile station apparatuses, where the active state is a state where reception of signals transmitted from the base station apparatus is enabled. The intermittent reception control apparatus further comprising a scheduler that transmits to the mobile station apparatuses a DRX command that operates to force these apparatuses to enter an inactive state.

Intermittent reception control apparatus, computer-readable recording medium, and intermittent reception control method

A wireless communication device includes an antenna unit that transmits and receives wireless signals, and one or more processors configured to conduct communication with a base station and control displacement of a service area of the base station and a service area of the wireless communication device in response to throughput characteristics of a cell formed by the base station.

Wireless communication device and method

Radio communication equipment performs radio communication with a first radio terminal group in a first period by using a frequency commonly for use by an adjacent base station, and with a second radio terminal group in a second period by using a frequency not commonly for use by the adjacent base station. The radio communication equipment includes a control unit to adjust time allocation of the first period and the second period; and a radio communication unit to perform radio communication with the first radio terminal group and the second radio terminal group according to the time allocation adjusted by the control unit.

Radio communication equipment

Each mobile terminal apparatus measures receiving power or receiving quality of a signal received from a radio communication apparatus. If a plurality of mobile terminal apparatuses in which the receiving power or the receiving quality is lower than or equal to a determined threshold are detected, then a communication control apparatus selects a mobile terminal apparatus made to function as a relay station from the plurality of mobile terminal apparatuses detected on the basis of a result of measuring the receiving power or the receiving quality. The mobile terminal apparatus selected relays communication between the radio communication apparatus and a mobile terminal apparatus which does not function as a relay station.

Communication control apparatus, mobile terminal apparatus, and radio communication method

A mobile station includes a reception quality generating unit that generates the reception quality based on a reception quality measured for data transmitted after transmission of a preamble signal. The mobile station is in a mobile communication system in which, a radio base station transmits the data after transmission of the preamble signal and, after transmission of a signal and before transmission of a subsequent preamble signal from the radio base station, the mobile station transmits to the radio base station, reception quality of the signal transmitted from the radio base station, whereby a transmission parameter for data transmitted to the mobile station after transmission of the subsequent preamble signal can be changed.

Mobile station and radio base station

For transmitting a common channel signal with characteristics with an approximated non-directivity, the common channel signal for all users is divided into sub-channel signals, corresponding to a number of antenna elements composing an array antenna, to be concurrently transmitted with non-directivity by using each antenna element. Individual channel signals, for each user, following the common channel signal with a desired directivity by using the antenna elements. Each sub-channel signal can be made a sub-channel signal obtained by dividing all sub-channel components composing the common channel signal for each sub-channel component by a predetermined number or dividing them depending on a receiving quality of each antenna element.

Transmission device, and array antenna control method and device

A base station assigns a subcarrier for downlink communications under Orthogonal Frequency Division Multiple Access. Before downlink communications with a mobile station, based on carrier sensing by the mobile station, the base station detects information concerning an available subcarrier from downlink signals using a modulating unit. The information concerning the available subcarrier is stored in a downlink-information sharing unit and is shared among the base station and the adjacent base stations. A downlink subcarrier setting unit sets the available subcarrier for downlink communications.

Base station apparatus, mobile station apparatus, and method of assigning subcarriers

A self test device includes an operational element determining unit that calculates, based on operation parameters for the time of operation of a board on which a reconfigurable device is mounted, operational elements used in the devices of the board for the operation, and non-operational elements; an element assignment determining unit that assigns a self-test target from among the non-operational elements; and a testing unit that makes a test signal transmit through a test path that passes through the test target.

Growing community of inventors

Kawasaki, Japan

Yoshiyuki Oota