Kabushiki Kaisha Toshiba

Fujitsu Toshiba Mobile Communications Limited

Fujitsu Mobile Communications Limited

The Tokyo Electric Power Company, Incorporated

Yutaka Asanuma

Shigeo Terabe

Kengo Kurose

Ryoko Matsuo

Hiroki Shoki

Takayoshi Ito

Shuichi Sekine

Naritoshi Saito

Michitsugu Mori

Tadashi Narabayashi

Mikihide Nakamaru

Makoto Yasuoka

Shuichi Ohmori

Kenji Kumagai

According to one embodiment, a flying body includes a radar, a supporter, a plurality of rotors supported by the supporter, and a controller. The rotors include a first rotor. The radar is configured to perform a detection operation and a non-detection operation. The controller is configured to perform a first control operation in a first transition from the non-detection operation to the detection operation. The controller is configured to perform a first change in the first control operation to change a rotational speed of the first rotor from a rotational speed of the first rotor in the non-detection operation. The detection operation is performed after the first control operation.

Flying body, controller, control program, and control method

According to one embodiment, an electronic apparatus includes a power transmitter and control circuitry. The power transmitter is configured to transmit power by using electromagnetic waves. The control circuitry is configured to transmit a first request including information on the electronic apparatus to a first server before power transmission, and start power transmission by the power transmitter if a first response from the first server relating to the first request is received.

Electronic apparatus and method

According to one embodiment, an electronic apparatus includes transmitter circuitry and processing circuitry. The transmitter circuitry transmits a first transmission signal during a first period via a transmission frequency band defined by a first wireless communication standard. The processing circuitry performs carrier sensing in a first frequency band during a second period following the first period. The transmitter circuitry further transmits, if a wireless signal is not detected in the carrier sensing, a second transmission signal during a third period following the second period. The processing circuitry performs, if the wireless signal is detected in the carrier sensing, carrier sensing in the first frequency band during a fourth period following the second period.

Mobile station notifies base station of identification information of base stations searched by searching as a search list, and the base station notifies the mobile station of base stations which are not regarded as prestored neighbor base stations and base stations which are in an unusable base station list, of the base stations in the notified search list, as an NG list. If necessity of handover is increased, the mobile station receiving the notification executes handover to base stations (for example, base station) in the search list other than the base stations included in the NG list.

Mobile communications system and mobile radio terminal

In a base station, after CRC is added to transmission data as a detection code, the transmission data is subjected to error-correcting coding using a convolutional code based on tail biting, divided into four frames of P-BCH and transmitted. For this reason, at a mobile station, even if reception (synthesis) is started from any frame of P-BCH represented as (b-) to (b-), a cyclic structure of the transmission signal is maintained due to the tail biting and reception data shifted by unit of frame can be obtained. For this reason, at the mobile station, even if a leading frame is unknown, decoding can be executed by one-time error-correcting decoding. A result of the decoding is subjected to CRC detection in four frame timings, the leading frame is detected and the transmission data is restored.

Digital communications system

A base station transmits a control channel transmitted before information channels upon performing differential coding between control channels of adjacent frequencies. A terminal apparatus performs transmission path estimation on the basis of a pilot while decoding the control channel having undergone the differential coding. The information channels are decoded on the basis of information obtained by decoding the control channel and a transmission path estimation result on the pilot.

Mobile communication system and wireless device

A wireless base station apparatus assigns channels to a narrowband mobile wireless terminal apparatus of type x (Rel-3 LTE) within the range of one component as its standard and assigns, to a broadband mobile wireless terminal apparatus of type y (LTE-A), channels not only within the range of one component but also channels in other components or between components.

Wireless transmission apparatus, wireless reception apparatus, and transmission method

On the basis of control information for CQI transmission of which a base station notifies a mobile station, the mobile station transmits CQI information for each sub-frame in a case of best effort type service or transmits the base station the CQI information at one time for every four sub-frames in a case of rate preservation type service.

Mobile radio terminal

When SRS serving as a base of CSI measurement at a base station apparatus is transmitted from each of two antennas, a control unit controls resource element mappers to make the SRS orthogonal to each other or identical with each other in terms of frequency or code between the two antennas, in accordance with use of CSI at a base station apparatus.

Radio communication apparatus and radio communication method

The present invention relates to a system conducting multi-carrier communications between a base station and a plurality of mobile terminals. When a transmission format of an individual information channel transmitted from the base station to the mobile terminals is output over a control channel from the base station to the mobile terminals, the transmission is conducted over the control channel of the same chunk as the chunk used in the individual information channel.

Radio communications system, and base station apparatus and mobile radio terminal apparatus employed in the system

A wireless communication terminal includes a measuring unit configured to measure each of channel qualities of resource blocks that a base station can allocate, a generating unit configured to divide the resource blocks into a plurality of groups, to generate quality data representing the channel qualities of a prescribed number of resource blocks included in each of the groups, which have relatively high channel quality, and to generate position data representing the positions which the resource blocks which have relatively high channel quality take in each of the groups, an encoding unit configured to encode the quality data and the position data to obtain encoded data, a modulation unit configured to modulate the encoded data to obtain a modulated signal, and a transmitting unit configured to transmit the modulated signal to the base station.

Wireless communication terminal and method

A reception unit measures a reception power level of a reference signal which is received from a base station apparatus BS. A reception signal processing unit acquires information indicative of a transmission power level of the reference signal. A control unit finds a path loss on the basis of the reception power level and this information. The control unit determines, on the basis of the path loss, a transmission power level of that one of two transmission frequency bands, which is closer to a frequency band with respect to which the pass loss has been measured. The control unit determines a transmission power level of the other transmission frequency band, which is farther from the frequency band with respect to which the pass loss has been measured, by correcting the transmission power level on the basis of a correction value based on a difference in frequency.

Wireless communication apparatus and wireless communication method

Each of a mobile station and a base station stores a Wideband CQI table and a Subband CQI table. At the mobile station, a control unit transmits a CQI report value indicating Wideband CQI, and an index (Index S) indicating a differential value of a Diff reference value based on the CQI report value and Subband CQI, on the basis of the tables. In addition, the control unit makes the Diff reference value variable to prevent an expression amount of the index from being damaged if the Wideband CQI report value is in a range close to an upper lit or a lower limit of the Wideband CQI table.

Mobile radio terminal and mobile communication system

In step, a mobile-station measures a reception level and an interference level with the other base-stations, for a base-station considered as a communication partner. In step, the mobile-station transmits a measurement result obtained in stepas control information to the base-station considered as the communication partner. In step, the base-station determines a transmission format in a transmission format candidate group used for the transmission to the mobile-station, on the basis of the control information, etc. If the base-station discriminates that an area where the mobile-station considered as the transmission destination is located has a great influence since an interference level indicated by the control information received from the mobile-station exceeds a preset threshold value, the base-station determines use of a transmission format in which repetition is executed at more than two times after executing interleaving resistant to the interference, in the transmission format candidate group.

Radio communication system and radio communication method

Each of a general chunk to which pilot signals are allocated at a general density, and a high-density chunk to which pilot signals are allocated at a higher density than the density of the general chunk, is transmitted in a frequency band common to OFDM transmitters. Each of the OFDM transmitters allocates the high-density chunk to any one of OFDM receivers, which notifies poor receiving quality.

Growing community of inventors

Tokyo, Japan

Yutaka Asanuma