Nippon Telegraph and Telephone Corporation

Panasonic Corporation

Nippon Telegraph Telephone Corporation

Panasonic Mobile Communications Co., Ltd.

Yusuke Asai

Masato Mizoguchi

Takeo Ichikawa

Riichi Kudo

Koichi Ishihara

Tomoki Murakami

Yasushi Takatori

Yasuhiko Inoue

Hiroyuki Shiba

Ryo Miyatake

Kohei Suzaki

Hirantha Abeysekera

Shoko Shinohara

Takatoshi Sugiyama

Munehiro Matsui

Daisei Uchida

Akira Kishida

Tomoyuki Yamada

Yasuo Suzuki

Hiroaki Sudo

Kengo Nagata

Kento Yoshizawa

Yosuke Fujino

Jun Mashino

Tomoaki Kumagai

Kazunori Akabane

Kentaro Nishimori

Masahiro Umehira

Nobuaki Otsuki

Satoshi Kurosaki

Wenjie Jiang

Hirantha Sithira Abeysekera

A base station according to an embodiment of the present disclosure includes a generation unit () that generates a beacon including switching information () indicating whether to cooperatively use a frequency channel and a transmission unit () that transmits the beacon.

Base station, terminal apparatus, and wireless communication method

Interference in preamble signals and pilot signals in cooperative transmission using interference suppressing technology is avoided. A wireless apparatus for transmitting a wireless signal on which directivity control has been performed to stations in a wireless system including at least one wireless apparatus is provided with a known signal generating unit which generates a known signal to be added to the wireless signal, a weighting processing unit which performs weighting on the known signal generated by the known signal generating unit, and a wireless processing unit which transmits the known signal on which the weighting has been performed by the weighting processing unit.

Wireless signal transmitting method and wireless apparatus

A base station () according to an embodiment includes a data processing unit () and a wireless signal processing unit (). The data processing unit () generates a MAC frame. The MAC frame includes input data and an identification bit (CB). The identification bit (CB) indicates that data is extended broadcast data. The wireless signal processing unit () converts the MAC frame into a wireless signal to distribute the wireless signal.

Utilizing wireless distribution content

A communication method determination apparatus includes a comparison unit and an instruction unit. The comparison unit obtains a bit string of a portion of a physical header for synchronization from a wireless frame that includes the physical header for synchronization in which information for synchronization in a physical layer is set and a physical data portion in which data of a higher-level layer than the physical layer is set, and compares the obtained bit string with a bit string pattern specific to a communication method targeted for determination. The instruction unit performs communication method determination processing for determining whether or not the communication method targeted for determination is used for the wireless frame, based on a result of comparison. If it is determined that the communication method targeted for determination is not used for the wireless frame, the instruction unit changes the communication method targeted for determination, instructs the comparison unit to newly obtain a bit string of a portion that follows the obtained bit string, from the physical header for synchronization, and to compare the newly obtained bit string with a bit string pattern specific to the post-change communication method targeted for determination, and performs the communication method determination processing again.

Communication scheme determination apparatus, communication scheme determination method and program

A data processing apparatus () according to an embodiment includes a data processing unit () and a wireless unit (). The wireless unit receives the data converted by the data processing unit and wirelessly transmits the input data to an access point. The data processing unit converts, when a remaining amount input from a battery () is in a first state, the input data with a first setting and outputs the converted data to the wireless unit. The data processing unit converts, when the remaining amount of the battery is in a second state different from the first state, the input data with a second setting and outputs the converted data to the wireless unit. A capacity per unit time of the data after conversion is different between the first setting and the second setting.

Data processing apparatus, data processing method, and data processing program

An interference wave arithmetic operation method performed by a wireless communication system including a plurality of antennas, the method including: determining an interferer antenna on the basis of information regarding directivity, a position, and an orientation of each of the plurality of antennas; and calculating interference wave reception intensity of a victim antenna using an interference wave from the determined interferer antenna.

Interference wave calculation method, interference wave calculation apparatus, computer program

A control device of the present invention is for provision in a gateway device that includes multiple communication units that perform wireless communication with terminal devices using different communication methods. Based on communication unit individual information that is acquired from the communication units and includes information indicating at least characteristics of the communication methods of the communication units, operations of the communication units are scheduled so as to prevent the overlapping of periods in which the communication units perform signal transmission/reception with the terminal devices.

Control apparatus, control method, and control program

A communication system including a mobile station that communicates with a wireless station and moves toward a predetermined destination, and a relay station that relays communication between the mobile station and the wireless station, includes: the mobile station that pauses movement when sensing an obstacle present on a first moving route toward the destination in a case of moving along the first moving route, and moves along a second moving route headed to the destination while avoiding the obstacle when establishing communication between the mobile station and the wireless station via the relay station in a case where the movement is paused; and the relay station that moves so as to keep a position where communication between the mobile station and the wireless station can be relayed according to movement of the mobile station when the mobile station moves along the second moving route.

Communication system and communication method

An interference source hunting method of hunting for an interference source of electromagnetic waves while moving between multiple measurement points, includes the steps of acquiring strength information of electromagnetic waves, estimating a distance from the measurement point to the location of the interference source, based on the strength information, calculating a first presence probability that the interference source is present at each position, based on whether a distance from the measurement point to the position is within the distance, updating second presence probabilities acquired in hunting in the past, based on the first presence probabilities, determining a position obtained by moving, by a predetermined distance, the measurement point toward a position with the second presence probability higher than the second presence probability at the measurement point, as a new measurement point, and determining, in a case where a size of an area in which each of the second presence probabilities is greater than or equal to a predetermined value is less than a predetermined value, that the location of the interference source is within the area.

Interference source searching method and interference source searching apparatus

A control device mounted in a first mobile body that includes a camera and an antenna includes: the camera configured to operate such that a direction of an optical axis of the camera and an oriented direction of the antenna are linked to each other; an identification unit configured to identify a second mobile body through image recognition from a captured image captured by the camera operating; and an antenna control unit configured to control the oriented direction of the antenna such that a position of the identified second mobile body in the captured image is a predetermined position.

Control apparatus, control system and control method

A mobile station control method by a computer for controlling a first mobile station for communicating with a second mobile station includes: distance detecting of detecting a distance between the first mobile station and the second mobile station; and first switching of switching a beam width of an electromagnetic wave emitted from the first mobile station to the second mobile station switching a beam width of an electromagnetic wave emitted from the first mobile station to the second mobile station the distance.

Mobile station control method and mobile station control apparatus

A disclosure relates to a wireless communication system for instructing terminals to control resources based on radio wave conditions. The system comprises: generating, by a base station, information on radio wave conditions based on an uplink wireless signal from terminals, storing learning model data for generating the information on quality of communications with an amount of processing that is equal to or less than a threshold value, selecting learning model data on the basis of known information, and transmitting the learning model data and a downlink wireless signal, receiving, by the terminal, the learning model data, generating information representing the radio wave environment based on the downlink wireless signal, generating information representing quality of communication based on the learning model data and the information representing the radio wave condition, and controlling the communication resource for the wireless signal based on the information representing quality of communication.

Method and system in a wireless communications for estimating quality based on learning model

A measuring robot () measures radio waves using a radio wave measuring unit () at a measurement point. A self-propelled route control unit () controls, in a case that reliability of communication using the radio wave at the measurement point is determined to be low based on one or more of a measurement result by the radio wave measuring unit () and information on an obstacle detected by a terrain/obstacle/position detection sensor unit (), a radio wave measuring unit () to measure the radio wave more precisely compared to the measurement of the electromagnetic wave in a case that the reliability of the communication using the radio wave is determined to be high.

Growing community of inventors

Yokosuka, Japan

Yusuke Asai