Panasonic Corporation

Panasonic Intellectual Property Corporation of America

Panasonic Intellectual Property Management Co., Ltd.

Tomoya Urushihara

Akihiko Matsuoka

Naganori Shirakata

Masashi Kobayashi

Hiroshi Takahashi

Hiroyuki Motozuka

Takenori Sakamoto

Katsuaki Abe

Kentaro Miyano

Koji Takinami

Yao Huang Gaius Wee

Wayne S Lee

Lei Huang

Masataka Irie

Junichi Morita

Gary Lang Do

Yoshito Shimizu

Kaoru Ishida

Kenichi Ono

Toru Matsuura

Toshifumi Nakatani

Noboru Yamamoto

Kosei Nakano

Isao Imazeki

A non-personal basic service set control point/access point (non-PCP/AP) communication apparatus includes a reception circuit, an estimation circuit, and a transmission circuit. The reception circuit receives a Directional Multi-Gigabit (DMG) Beacon frame including a sector sweep (SSW) field, the SSW field including a Parameter subfield indicating a value obtained by using a transmission Equivalent Isotropic Radiated Power (EIRP) of a PCP/AP communication partner apparatus and a reception antenna gain of the PCP/AP communication partner apparatus. The estimation circuit estimates an expected reception power at the PCP/AP communication partner apparatus by using the value of the Parameter subfield, and checks inequality between the estimated expected reception power and a receiver sensitivity value. The transmission circuit transmits a frame for Association Beamforming Training (A-BFT) if the estimated expected reception power is larger than the receive sensitivity value.

Non-personal basic service point / access point (PCP/AP) communication device, non-PCP/AP communication method, PCP/AP communication device and PCP/AP communication method

This wireless communication terminal device includes a control circuit that: causes, after receiving a beacon from a base station device, a connection to be established between the wireless communication terminal device and the base station device using a first control program; if a connection notification request to an external server was received from one or more application programs, uses a second control program, after the establishment of the connection, to output a connection establishment notification to the one or more application programs; and after the connection establishment notification is received, outputs to a communication circuit, via the first control program, a communication request to the external server device by the one or more application programs. The communication circuit of the wireless communication terminal device transmits the communication request to the base station device.

Wireless communication terminal device, and wireless communication method therefor

A transmission device includes N wireless transmission circuits and N transmission buffers. N is an integer equal to or greater than two. Each of the N transmission buffers is connected to a respective wireless transmission circuit of the N wireless transmission circuits. At least a part of a piece of delivery data is stored in each of the N transmission buffers before the N wireless transmission circuits establish wireless links. The N wireless transmission circuits are instructed to transmit the piece of delivery data stored in the N transmission buffers after the N wireless transmission circuits establish the wireless links.

Transmission device, transmission method, reception device, and reception method

A non-personal basic service point/access point (PCP/AP) communication device includes a reception circuit that receives a DMG Beacon frame, a judging circuit that judges whether or not to transmit a frame used for beamforming training (BFT), using information relating to reception antenna gain of a PCP/AP communication device included in a DMG Beacon frame and information relating to reception power of a DMG Beacon frame, and a transmission circuit that transmits the frame used for BFT in a case of the judging circuit having judged to transmit the frame used for BFT.

A wireless communication method includes: storing antenna-pair set information and a first measurement result in association with each other for every positional-arrangement, the antenna-pair set information being information on a set of pairs of transmission antennas and reception antennas that achieves a best throughput for the positional-arrangement, the first measurement result being a measurement result of reception characteristics of a training signal transmitted from at least one of the plurality of transmission antennas; selecting current antenna-pair set information corresponding to a current positional-arrangement by comparing a second measurement result with the first measurement result stored, the second measurement result being a measurement result of reception characteristics of the training signal measured at the plurality of reception antennas in the current positional-arrangement; and establishing links between the plurality of transmission antennas and the respective plurality of reception antennas based on the current antenna-pair set information corresponding to the current positional-arrangement.

Wireless communication system and wireless communication method

Connectability determining circuitry determines connectability over a millimeter wave band with respect to a content delivery apparatus. When a determination result of the connectability indicates that connection is enabled, request-signal generating circuitry generates a connection request signal for requesting connection over a millimeter wave band, from when undownloaded content is selected until download of the selected undownloaded content is requested, and transmits the connection request signal to the content delivery apparatus via millimeter-wave wireless circuitry. Control circuitry downloads the undownloaded content from the content delivery apparatus via the millimeter-wave wireless circuitry.

Wireless communication apparatus, connection management apparatus, content delivery system, and wireless communication method

A base-station control apparatus includes: a number-of-training-packets determining circuit that determines the number of training packets to be transmitted by a wireless terminal, based on the number of first directional beam patterns used by a first base-station apparatus connected to the wireless terminal and the number of second directional beam patterns used by at least one second base-station apparatus not connected to the wireless terminal; and a notification issuing circuit that issues a notification indicating the determined number of training packets to the first base-station apparatus.

Base-station control apparatus, base-station apparatus, and control method that determine a number of training packets to be transmitted by a wireless terminal

A location estimation system for estimating a location of a wireless communication terminal, the location estimation system including first to M-th wireless communication devices and a control device, wherein i-th wireless communication device includes communication circuitry, which in operation, receives a signal transmitted from the wireless communication terminal using beams in Ni directions, and control circuitry, which in operation, calculates Ni reception qualities corresponding to the beams in the Ni directions, respectively, and wherein the control device includes control circuitry, which in operation, estimates i-th arrival direction of the signal received by the i-th wireless communication device by comparing the Ni reception qualities with the radiation angle characteristics of the beams in the Ni directions, and estimates the location of the wireless communication terminal based on the first to the M-th arrival directions estimated and locations of the first to the M-th wireless communication devices.

Location estimation system, location estimation method, and base station control device

A base-station control apparatus includes: a sub-anchor candidate selector that selects sub-anchor candidates from base-station apparatuses different from a first base-station apparatus connected to a wireless terminal; an arrival-direction estimator that estimates arrival direction vectors with respect to the first base-station apparatus and the candidates, based on reception qualities of signals that the first base-station apparatus and the candidates receives from the wireless terminal; a sub-anchor selector that selects a sub-anchor from the candidates, based on angles made by the estimated arrival direction vectors and line segments each having end points at positions of the first base-station apparatus and the corresponding candidate; and a position estimator that estimates a position of the wireless terminal, based on the arrival direction vectors with respect to the first base-station apparatus and the sub-anchor.

Base-station control apparatus and position estimation method

Provided is a content delivery system in which a content delivery server delivers content to a content delivery client. The content delivery client transmits content using first wireless communication, detects the area of second wireless communication, and if it determines that sufficient free space is not present in a first storage thereof, transmits a part of data stored in the first storage to the content delivery server using the second wireless communication. The content delivery server makes free space in the first storage by temporarily storing the data in a second storage thereof and then delivers content using the second wireless communication on the basis of the control information.

Content delivery system and method

A wireless communication apparatus including an antenna, which, in operation, changes a beam pattern by using a plurality of antenna elements, a communicator, which, in operation, performs wireless communication with a communication terminal by using the antenna, quality information acquisition circuitry, which, in operation, acquires quality information indicating a communication quality of the wireless communication, movement information acquisition circuitry, which, in operation, acquires movement information indicating movement of a relative position of the communication terminal with respect to the antenna, and beam control circuitry, which, in operation, controls the beam pattern to be changed by the antenna on the basis of the acquired quality information and movement information.

Wireless communication apparatus and wireless communication control method

When switching the mode of a power amplifier between compressed mode and uncompressed mode, accurate transmission power control is realized. A transmission power control method includes setting a power setting value of mode to switch to, such that an inter-mode output power error is canceled (equal to step ST), calculating an intra-mode output power error from the power setting value of the mode to switch to (equal to step ST), calculating a gain linearity value based on the power setting value of the mode to switch to and an output power error of the intra-mode (equal to step ST), and resetting the power setting value of the mode to switch to based on the gain linearity value (equal to steps STand).

Transmission power control method and transmission power control apparatus

A receiving apparatus converges a gain to a target gain even when a fish bone effect signal is included having a low power period in which signal power decreases abruptly compared to average signal power. The receiving apparatus () receives a signal including the fish bone effect signal having the low power period (FBE signal period) in which signal power decreases abruptly compared to average signal power. A FBE detecting section () detects an FBE signal period of a low power period based on a gain error corresponding to a difference between target power and average signal power of the received signal of the adjusted gain. Further, the gain error correcting section () selects a lower value than 1 as a convergence coefficient in the FBE signal period of a low power period, multiplies the gain error with the selected convergence coefficient and corrects the gain error.

Receiving apparatus and auto gain control method

A transmitter includes: a decoder for transforming an IQ signal into a linear sum of two vectors which have non-negative coefficients, respectively, which form an angle of (&#x3c0;/4), and which are included in eight vectors representing directions indicated by eight angles of (&#x2212;&#x3c0;/2), 0, (&#x3c0;/2), &#x3c0;, (&#x2212;3&#x3c0;/4), (&#x2212;&#x3c0;/4), (&#x3c0;/4), and (3&#x3c0;/4), respectively, and for outputting information upon magnitudes and angles of the two vectors; a phase generator for generating eight phase signals corresponding to phases of (&#x2212;&#x3c0;/2), 0, (&#x3c0;/2), &#x3c0;, (&#x2212;3&#x3c0;/4), (&#x2212;&#x3c0;/4), (&#x3c0;/4), and (3&#x3c0;/4), respectively, and outputting the eight phase signals; and a selector for selecting two phase signals having phases equivalent to angles of the two vectors, from among the eight phase signals, and amplifying the two phase signals having been selected, based on the information upon the magnitudes and the angles, and outputting, as a plurality of amplification signals, the two phase signals having been amplified.

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Kanagawa, Japan

Tomoya Urushihara