Sony Corporation

Hiroyuki Yamasuge

Takashi Usui

Masayuki Takada

Shigeru Arisawa

Shinichiro Abe

Shuhei Sonoda

Seiji Esaka

Mitsuhiro Suzuki

Systems and methods for operating in connection with mobile devices are described. The mobile devices may move between online and offline areas. In some instances, a prediction may be made as to when a mobile device will enter an offline area. The prediction may be based on sensor information. Data or a key may be transferred to the mobile device prior to entering the offline area.

Server and method, non-transitory computer readable storage medium, and mobile client terminal and method

To reduce power consumption for communication operation wherein a client terminal at the time of offline searches a base station or access point. A server uses a communication information predicting algorithm to predict a location or time whereby the server becomes an offline state over a movement route of a client terminal, and a location or time whereby the server returns to an online state, and informs to the client terminal. The client terminal suspends a communication function when reaching the informed offline predicted location or time. The client terminal at the time of offline determines that the current location or time has reached an online return predicted location or time using location recognition or point-in-time recognition, and restores the communication function.

Information providing apparatus and information providing method, wireless communication apparatus and wireless communication method, computer program, and wireless communication system

It is desired to suitably carry out transmission processing and reception processing carried out when transmitting a multicarrier signal where specific subcarriers are omitted. Therefore, the present invention carries out transmission avoidance processing operable when transmitting a multicarrier signal to replace signals corresponding to subcarriers, in a plurality of subcarriers, at frequency positions where transmission is avoided with a null signal. Subsequently, an inverse Fourier transform is carried out on the output of the transmission avoidance processing, the transmission power of the multicarrier signal that has been transformed is amplified in accordance with the number of subcarriers replaced with the null signal and the multicarrier signal is transmitted. When this multicarrier signal is received, subcarriers where transmission was avoided are estimated, and when it is estimated in the estimation that subcarriers where transmission was avoided are present, despreading and demodulation are carried out without using the subcarriers where transmission was avoided.

Transmission apparatus, transmission method, reception apparatus, reception method, and transmission system

A transmission device of the present invention includes a MAC that generates data I transmitted by a band group M and generates data J transmitted by a band group N; signal switching parts that exchange a part of the data I and a part of the data J; and antennas that simultaneously transmit the data I and the data J after data exchange is performed by the signal switching parts, by the band group M and the band group N.

Transmission device, reception device, communication system, transmission method and program

A transmitting apparatus includes a transmission power reducing section to reduce a power of a transmission signal in a prescribed frequency band of a multicarrier signal containing a plurality of subcarriers and change the prescribed frequency band in which the power of the transmission signal is reduced in time sequence. In this configuration, when detecting an interfered system by reducing a transmission power in the prescribed frequency band, it is possible to minimize the bandwidth of the prescribed frequency band and thereby minimize degradation of reception characteristics due to the reduction of the transmission power.

Transmitting apparatus, communication system, transmitting method and program

A communication device configured to perform packet reception processing, with the header of a packet including a header sequence and a Reed-Solomon code, includes: a header check sequence inspecting unit configured to detect, based on the header check sequence included in a received packet header, an error of the header; a Reed-Solomon encoding unit configured to encode the header of a received packet other than the Reed-Solomon code to generate a Reed-Solomon code; a Reed-Solomon code inspecting unit configured to detect whether or not the Reed-Solomon code generated by the Reed-Solomon encoding unit is completely identical to the Reed-Solomon code within the received packet header; and a processing control unit configured to control payload processing of a received packet in accordance with the inspection results of the header check sequence inspecting unit and the Reed-Solomon code inspecting unit.

Communication device, communication method, and computer program

A receiving apparatus according to the present invention has a plurality of synchronizing circuits which is provided corresponding to different preamble signals of a reception signal and operate simultaneously at the time of receiving the preamble signals so as to output synchronous signals, a correlation value comparing section which compares correlation values of the synchronous signals output from the plurality of synchronizing circuits, and a synchronizing section which determines whether the received signal is for the subject apparatus based on a comparison result from the correlation value comparing section.

Receiving apparatus, communication system, receiving method and program

A wireless communication apparatus according to the present invention includes a wireless communication transmitting circuit and a wireless communication receiving circuit that perform communication with another apparatus connected through a wireless communication network; a power situation acquiring unit that acquires a power situation of the wireless communication apparatus; and a wireless power transmitting circuit that wirelessly supplies power to another apparatus in accordance with a power supply request from another apparatus connected through the wireless communication network, when the power situation of the wireless communication apparatus satisfies a predetermined condition.

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

A wireless communication apparatus according to the present invention includes a user terminal information acquiring unit that acquires user terminal information related to user terminals, which are connected through a wireless communication network to enable communication, from the user terminals; a wireless power transmitting circuit that wirelessly supplies power to the user terminals; a control unit that determines whether or not to supply the power to the user terminals based on the user terminal information; a user terminal location acquiring unit that acquires location information of the user terminals where the power is supplied; and a transmission power direction instructing unit that controls directivity of power supply based on the location information of the user terminals.

The present invention provides a wireless communication apparatus including: a communication processing unit that transmits and receives a radio signal; a wireless power transmitting unit that supplies power wirelessly to an apparatus located within a power supplyable range; a location data obtaining unit that obtains location data of a power receiver apparatus; and a control unit that controls a power supply to the power receiver apparatus based on the location data of the power receiver apparatus obtained by the location data obtaining unit.

Wireless power and communication system

A communication device of the present invention includes channel compensations, an adaptive processor, a MAC and a controller. The channel compensations weight each of signals received by a plurality of antennas based on an SN ratio of the received signals so as to control the antennas to operate as combining diversity systems. The adaptive processor weights each of the signals received by the plurality of antennas so as to suppress the interference signal and to control the antennas to operate as adaptive array antennas. The MAC detects frequency hopping information of the received signals. The controller changes between the operation of the combining diversity systems and the operation of the adaptive array antennas, based on the frequency hopping information.

Communication device, communication method, communication system and program

A receiving apparatus receives an Orthogonal Frequency Division Multiplexing (OFDM) signal, including an OFDM symbol, subject to frequency hopping on multiple bands, the OFDM symbol, which functions as a channel estimation sequence, being transmitted multiple times at hopping intervals in a time division manner on each of the bands. The apparatus includes a receiving section for receiving the OFDM signal transmitted on a channel, a Fourier transform section for demultiplexing the OFDM signal into signals of sub-carriers, a channel correcting section for estimating a channel characteristic by using the OFDM symbol functioning as a channel estimation sequence resulting from the demultiplexing into sub-carrier signals and performing channel correction thereon, and a decoding section for performing symbol identification and decoding on the channel-corrected data signal back to the original data signal.

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Tokyo, Japan

Hiroyuki Yamasuge