Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Other

Panasonic Holdings Corporation

Panasonic Intellectual Property Management Co., Ltd.

Ntt Docomo, Inc.

Panasonic Intellectual Property Corporation of America

Ntt Mobile Communications Network, Inc.

Matsushita Electrical Industrial Co., Ltd.

Matsushita Communication Industrial Co., Ltd.

Panasonic Mobile Communications Co., Ltd.

Godo Kaisha IP Bridge 1

Optis Wireless Technology, LLC

Invt Spe LLC

Mitsuru Uesugi

Katsuhiko Hiramatsu

Osamu Kato

Kouichi Honma

Kazuyuki Miya

Hiroaki Sudo

Toshiyuki Uehara

Kazuhisa Tsubaki

Yoshiko Saito

Kenichi Miyoshi

Toyoki Ue

Atsushi Sumasu

Sadaki Futagi

Keiji Takakusaki

Junichi Aizawa

Keiichi Kitagawa

Makoto Sasaki

Masatoshi Watanabe

Keisuke Ebiko

Eiji Ota

Daichi Imamura

Atsushi Matsumoto

Hitoshi Yoshino

Isamu Yoshii

Takashi Kitade

Hiroshi Suzuki

Jinsong Duan

Izumi Horikawa

Hidenori Kayama

Akinori Tatsumi

Kazuo Shida

Guizeng Shi

Atsushi Iwaoka

Akihiko Nishio

Takeshi Akiyama

Minoru Okamoto

Yuta Seki

Hiroki Haga

Koichi Homma

Taku Nagase

Nobuo Asano

Toshihiro Ishikawa

Hideki Yukitomo

Tadashi Matsumoto

Makis Kasapidis

Genichiro Ohta

Genichiro Ota

Tetsurou Satou

Kouji Abe

Tsuyoshi Osato

Toshiyuki Matsushita Electric IndCoLtd Uehara

A user terminal sends out an interest including text data and an image file for matching to an information centric network. When a server receives the interest from the user terminal, the server separates the image file for matching from the interest and sends out a simple interest that includes the text data and does not include the image file for matching and a complex interest that includes the image file for matching to the information centric network. A camera associates the text data included in the simple interest with the image file for matching included in the complex interest, executes a matching process for verifying whether any of the image files accumulated in the own device matches the image file for matching based on the criteria stipulated in the text data, and transmits a matching result report to the user terminal.

Information collecting method, communication control apparatus, and information collector apparatus

In order to enable a user to acquire a desired content more quickly by performing a matching process by using search target ID information identifying a search target so as to properly acquire a content regarding the search target and to shorten a time required to complete the matching process, a communication device such as router is configured such that, when receiving an interest form a content-centric network, the communication device performs a search process on contents accumulated therein, aiming to find one or more contents which meet a search criteria set specified by the interest, performs the matching process for verifying whether the content found in the search process matches the search target ID information (face image) to acquire a content regarding the search target, and transmits the acquired content to a communication device of a content request source.

Communication device, communication system, and content collection method

In order to track a mobile body in an efficient manner, a server collects passage trail information relating to a mobile body to be tracked from a camera provided in an information-centric network to thereby track the mobile body. Specifically, the server transmits a request message which designates a search area and a search period to the information-centric network, requesting the information-centric network to provide passage trail information relating to the mobile body, the passage trail information being acquired by the camera; receives a response message including the passage trail information; and collects the passage trail information associated with the search area and the search period designated by the request message to thereby generate tracking information.

Communication device, communication system, and mobile body tracking method

A controller is provided that controls a plurality of base stations, each configured to communicate with a mobile station, using some carrier frequencies of a frequency band shared with another system. The controller includes a receiver that receives first frequency information from a first base station in communication with the mobile station, and second frequency information from a second base station, the second base station being a handover destination. The controller also includes a frequency selector that selects a carrier frequency for systematic-bit mapping and a carrier frequency for parity-bit mapping based on the first frequency information and the second frequency information. The controller further includes a signal-assignment-information generator that generates signal assignment information, indicating the carrier frequency for systematic-bit mapping and the carrier frequency for parity-bit mapping, and a transmitter that transmits the signal assignment information to the first and the second base stations.

Base station, controller, communication system, and interference avoidance method

Observing an observation area wider than a cruising distance of a drone, an acquiring observation data of all observation sections and analyzing all the observation area, even when it is impossible for the operator to go to the observation base due to a failure of a traffic infrastructure and when a failure of a communication infrastructure occurs. The drone flies through the observation section from the observation base, where the drone is on standby, to a next observation base to observe, to transmit all observation data after a first observation section stored in the drone to the next drone on standby at the observation base when the drone lands at the next observation base, and to deliver observation data of all observation sections to the observation base, which is a destination, by sequentially repeating the performance of the transmitting of data between the drones in all observation sections.

Observation system using flying objects, and observation method

An object is to suppress a decrease in communication quality and improve the communication quality even when interference is present in some of a frequency band in use in a case where a turbo coding scheme is combined with multicarrier communication using some of a frequency band shared with another system. A frequency selector () selects a band not used by another system, based on a measurement value of a reception level, then selects a subband for systematic-bit mapping from among subbands having a measurement value of the reception level lower than a threshold, and selects a subband for parity-bit mapping from among subbands other than the subband for systematic-bit mapping, for each subband (carrier frequency) of the selected band. A carrier-mapper () maps a systematic bit and parity bit to each subband based on the result of selection by the frequency selector ().

An assignment sectiondetermines communication resource assignment to communication terminals based on a transmission rate at which communication is possible for each subcarrier of each communication terminal, and instructs a buffer sectionto output forward transmission data. In addition, the assignment sectioninstructs a frame creation sectionto perform forward transmission data symbolization, and also outputs a signal indicating communication resource assignment to each communication terminal. The buffer sectionholds forward transmission data, and outputs forward transmission data to the frame creation sectionin accordance with instructions from the assignment sectionThe frame creation sectionsymbolizes a resource assignment signal and transmission data to create a frame, which it outputs to a spreading section

Base station apparatus, communication terminal apparatus, and communication method

A transmitting apparatus, a receiving apparatus and a wireless communication method for suppressing interference between codes, while further reducing the ratio of redundant components occupying a signal to improve the transmission efficiency. The transmitting apparatus () transmits a signal having a frame structure in which a plurality of symbols follow a pilot symbol to which a guard interval has been added. In the receiving apparatus () that receives that signal, a long FFT target section acquiring part () acquires, from the received OFDM signal, a long FFT target section that is a target section in which delay waves are to be removed by use of a pilot symbol. A long FFT part () performs a fast Fourier transformation of the long FFT target section to convert it to a frequency domain signal. A frequency equalizing part () performs a frequency equalization of the long FFT target section by use of an interpolation result of communication line estimation value. A long IFFT part () performs an inverse fast Fourier transformation of the long FFT target section as frequency equalized to convert it back to a time domain signal.

Transmitting apparatus, receiving apparatus, and wireless communication method

An assignment sectiondetermines communication resource assignment to communication terminals based on a transmission rate at which communication is possible for each subcarrier of each communication terminal, and instructs a buffer sectionto output forward transmission data. In addition, the assignment sectioninstructs a frame creation sectionto perform forward transmission data symbolization, and also outputs a signal indicating communication resource assignment to each communication terminal. The buffer sectionholds forward transmission data, and outputs forward transmission data to the frame creation sectionin accordance with instructions from the assignment section. The frame creation sectionsymbolizes a resource assignment signal and transmission data to create a frame, which it outputs to a spreading section

A mobile terminal device for performing multi-carrier communication with a base station device can improve communication quality while reducing the data amount without lowering accuracy of feedback information. In the mobile station device (), a reception level measuring unit () measuring SINR as a reception level for each chunk formed by a plurality of sub-carriers according to a known signal; a control information transmission control unit () transmits feedback information (CQI information) based on the communication quality of each chunk to a base station device (); a relative value calculation unit () calculates a relative value of MCS corresponding to the reception level between adjacent chunks from the reception level of each chunk; and a CQI information generation unit () generates feedback information (CQI information) from an absolute value of MCS corresponding to the reception level of the reference chunk and a relative value of MCS corresponding to the reception level between the adjacent chunks.

Mobile station apparatus, communication method, and base station apparatus

Mobile station device

A modulation apparatus is disclosed that enables significant improvements in signal transmission rate in a limited frequency band as compared with conventional modulation schemes. The modulation apparatus has first and second frequency-increasing single side band (SSB) modulators. The modulators are configured to have respective carrier frequencies with a difference by a frequency corresponding to the symbol frequency (i.e. fundamental frequency of the input symbol). An adder combines a lower side band (LSB) signal obtained from the SSB modulator set for a higher carrier frequency, and an upper side band (USB) signal obtained from the SSB modulator set for a lower carrier frequency to obtain a modulation signal.

Modulation device, demodulation device, modulation method and demodulation method

To narrow the dynamic range of multicarrier signals and prevent both the increment of cost and the degradation of power efficiency. A modulating part () modulates transport data. An S/P converting part () performs an S/P conversion of a modulated symbol and outputs the modulated symbols, the number of which is the same as the number of all subcarriers, to an IFFT part () in parallel. The IFFT part () assigns the modulated symbols to the subcarriers, the frequencies of which are orthogonal to each other, to perform an inverse fast Fourier transform. A P/S converting part () performs a P/S conversion of the signals of time domain. When the instantaneous amplitude level of an OFDM signal is lower than a predetermined threshold value, a pit clip part () replaces this amplitude level by the predetermined threshold value. In other words, when the instantaneous power of the OFDM signal is close to zero, the pit clip part () converts a power value to a value that is greater than the actual power value.

Multicarrier transmitting apparatus and multicarrier transmitting method

A modulating device capable of generating an OFDM signal and having a drastically improved frequency use efficiency. The modulating device has modulators (()) for modulating a signal to be modulated and having a Nyquist roll-off frequency characteristic with a carrier frequency having a difference two times the Nyquist frequency and combiners (()) for generating modulation output having a speed two times that of the signal to demodulated and the same Nyquist roll-off slope as the signal to be modulated by combining the outputs of the modulators (()). Thus a double speed wave can be superposed on the same frequency without varying the roll-off slope of the Nyquist characteristic, and therefore an OFDM signal () having a drastically improved frequency use efficiency is provided.

Modulation apparatus, modulation method, and demodulation apparatus

ecalculating sectiongenerates a bth chip C(a,b) of an ath spreading code based on C(a,b)=ewhere e is a base of natural logarithm and N is a length of the spreading code (i.e. spreading code length). It is assumed in the above equation that n=a&#xd7;b, a=0&#x2dc;N&#x2212;1, and b=0&#x2dc;N&#x2212;1. It is thereby possible to generate orthogonal spreading codes with arbitrary lengths.

Method of generating spreading codes, CDMA transmission apparatus, and CDMA reception apparatus

Growing community of inventors

Yokosuka, Japan

Mitsuru Uesugi