Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Sony Corporation

Mitsubishi Electric Corporation

Yuji Igata

Hisao Koga

Masahiro Maki

Go Kuroda

Akio Kurobe

Koji Ikeda

Satoshi Hasako

Nobutaka Kodama

Michinori Kishimoto

Toshiyuki Wakisaka

Mutsuhiko Oishi

Shoichi Koga

Shinichiro Ohmi

Akihiro Yamashita

Fumio Ichihara

Yasushi Yokomitsu

Tsunehiro Hanada

Tomohiro Kimura

Takehiro Sugita

Shigeo Yoshida

Shigeru Takasu

Ryota Yukizane

Hirotoshi Yamada

Hiromu Okamoto

Toru Yasukawa

Junichi Ohshima

Yoshinori Mizugai

Kazuaki Kusune

Junji Kondou

Satoshi Shinozaki

Tsuyoshi Yamaguchi

Shigekiyo Nosaka

Junji Yano

Kazuhiko Tamesue

Noriaki Maehara

Akio Yao

Masahiko Haraguchi

Hidekazu Matsunobu

Masanori Kataoka

A low-pass filter () is disposed between a residential power line () and a vehicle power line (), and attenuates a power line communication high-frequency signal. A power line communication section () is connected in parallel to the low-pass filter (), performs conversion to a signal of a frequency lower than that of a power line communication high-frequency signal superimposed on the residential power line () from a charge command apparatus, and communicates with a vehicle via the vehicle power line () by means of the converted low-frequency signal. A control section () controls connection or disconnection of a connection section () based on a charge command apparatus command signal demodulated by the power line communication section ().

Power supply apparatus and vehicle charging apparatus

Provided are a power supply device and a power supply method which can carry out proper charging even when a plurality of electric automobiles are connected to a charging stand. A charging stand () supplies power to electric automobiles () by way of the charging cables (). The charging stand () is provided with: a charging cable identification signal transmitter () for transmitting a charging cable identification signal to the electric automobiles by way of the charging cables (); an electric automobile identification signal receiver () for receiving an electric automobile identification signal and a charging cable identification signal from the electric automobiles () by way of the charging cables (); and a controller () for charging the electric automobiles () when the electric automobile identification signal receiver () receives the electric automobile identification signal and the charging cable identification signal.

Power supply device and power supply method

Disclosed is a vehicle charging device that can perform communication even if the vehicle charging device and a charging instruction device are connected to power line pairs having different phases in a multiple-wire power line. The vehicle charging device includes: a power line communication unit that performs communication over a multiple-wire power line or a power line for vehicles; a power line connection unit that connects a pair of power lines within the multiple-wire power line to the power line for vehicles; and a control unit that controls the connection or the disconnection of the power line connection unit. The power line communication unit selects a signal from a pair of power lines within the multiple-wire power line and communicates with the charging instruction device, and performs communication with the vehicle over the power line for vehicles.

Vehicle charging device and vehicle charging system using same

A power line communication apparatus that enables communication to be performed between an authentication apparatus and a vehicle, thereby enabling authentication processing to be performed, even before power is supplied to a communication section from a charging apparatus or an electrical storage apparatus. This power line communication apparatus has a communication section that communicates with a PC serving as an authentication apparatus outside the body of the vehicle via a power line, and a battery that is connected to the communication section and supplies power to the communication section; and the communication section performs authentication communication with the PC via the power line before power is supplied from the charging apparatus or the electrical storage apparatus.

Power line communication apparatus and vehicle

A first communication apparatustransmits a pilot signal which was generated by a pilot signal generation section, at predetermined timing, and detects an unbalance component of a transmission lineat the time of pilot signal transmission in an unbalance component detection section, and controls a transmission signal in such a manner that an unbalance component is reduced by a transmission control sectionon the basis of the detected unbalance component.

Line status detection apparatus, communication apparatus, and line status detection method

A frequency band is divided into N subchannels. Sub-channels are first allocated for a power line communication system having a higher priority, such as public communication or the like. Sub-channels for a power line communication system having a relatively low priority, such as in-home communication or the like, are allocated from free subchannels. In this case, the subchannels used by the power line communication system having the high priority are limited to a plurality of consecutive subchannels from an upper side or a lower side of the frequency band.

Communication apparatus enabling coexistence of systems

PLC modems and a PLC communication system that includes the PLC modems receive a multicast packet from a video server of a multicast group. When a MAC address table is set therein, the PLC modems and the PLC communication system convert the multicast packet into a unicast packet and transmit the converted packet to a power line. When no MAC address is set, the PLC modems and the PLC communication system transmit the multicast packet to the power line.

Power line communication apparatus, power line communication method and communication apparatus

A coexistence controller which performs management and control of time division for coexistence, is provided in a power line communication modem which has a function as a QoS controller for a QoS type communication system and a power line communication modem for a best-effort type communication system. In the QoS type communication system, by controlling allocation of a communication band in accordance with priorities given to the communication systems by cooperation of the coexistence controller and the QoS controller, the power line communication systems having different schemes can coexist.

Communication apparatus enabling temporal coexistence of systems

A communication system includes a synchronizing signal generator that generates a synchronizing signal based on a timing of an alternating waveform in a power line, a data communicating circuit that performs the data communication, and a communication controller that controls to acquire a transmitting right utilizing a timing of the synchronizing signal and to control the communication circuit in accordance with whether or not the communication apparatus acquires the transmitting right.

Communication apparatus and communication method

A communications device, which performs data communication, includes an AC cycle sensorwhich is connected to a power linesupplied with an a.c. voltage and generates a synchronous signal SS at timing of an a.c. voltage waveform AC of the power line; a data communicatorfor performing data communication; and a communications controllerwhich performs communication of a control signal including information showing at least one of a communications device and a communications standard and controls the data communicator. When the a.c. voltage supplied to the power lineis an N-phase and when the cycle of the a.c. voltage waveform is T, data communication to be performed in a communication period subsequent to the period is controlled on the basis of the control signal included in the period of T/2M on condition that M is a natural multiple of N.

Communications device and communications method

A relay apparatus includes a plurality of connecting terminals, such as a modem connecting terminal, a power line connecting terminal, an electric appliance connecting terminal and an antenna line connecting terminal; a selector that selects at least one connecting terminal from among the plurality of connecting terminals to transmit and receive a communication signal; and a control circuit that controls the selector. The relay apparatus further includes a first communication filter that passes signals in a frequency band used for communication by a power line communication modem and that blocks signals in other frequency bands, and a second communication filter that passes signals in a frequency band used for communication by another electric appliance and that blocks signals in other frequency bands.

Relay apparatus and electric appliance

A power line communication apparatus transmits a signal to a first power line communication apparatus through a power line connecting to a second power line communication apparatus. The power line communication apparatus includes an information retriever for retrieving transmission rate information indicating both a first transmission rate and second transmission rate. The first transmission rate correspond to a first path of the power line along which the signal is directly transmitted to the first power line communication apparatus, and the second transmission rate corresponds to a second path of the power line along which the signal is transmitted through the second power line communication apparatus to the first power line communication apparatus. A selector selects, based on the transmission rate information, a path corresponding to a higher transmission rate among the first and second paths. A transmitter transmits the signal through the selected path.

Power line communication apparatus, power line communication system, power line communication method and integrated circuit

A terminal for performing multiple access transmission suitable to a transmission path having varied characteristics includes a transmission/reception section, a control unit, a transfer management section, and an external interface section. Specifically, the terminal refers to an IGMP (MLD) message received by the transmission/reception section to classify a transmitter host and a relay device of the message based on a characteristic of the transmission path, and performs a multiple access transmission of a multicast packet in a form suitable to the characteristic of the transmission path.

Terminal for performing multiple access transmission suitable to a transmission path having varied characteristics

A communication network system sets communication parameters which enable an operation under a maximum possible communication rate in a situation where a transmission path has cyclic noise/impedance fluctuations. A transmission/reception apparatustransmits training packets for checking the state of the power line at two distinct points in time. A transmission/reception apparatus analyzes SNR at each carrier frequency, and stores an SNR evaluation result. The transmission/reception apparatus compares two SNR evaluation results which are obtained through two instances of a channel estimation algorithm, selects an SNR evaluation result which dictates a faster PHY rate, and transmits it to the transmission/reception apparatus. The transmission/reception apparatus changes modulation/demodulation rules based on the received SNR analytical result.

Communication network system, and transmission/reception apparatus, method and integrated circuit for use therein

Growing community of inventors

Fukuoka, Japan

Yuji Igata