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1. 发明申请

US20230025646A1 TERMINAL DEVICES, COMMUNICATION METHODS, AND COMMUNICATION SYSTEMS 有权
公开(公告)号：US20230025646A1
公开(公告)日：2023-01-26
申请号：US17785370
申请日：2019-12-16
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Ryota SHIINA , Tomohiro TANIGUCHI , Kazutaka HARA , Shinya TAMAKI , Tomoki MURAKAMI , Toshiro NAKAHIRA
IPC分类号： H04B10/114
摘要： An object is to provide a terminal device, a communication method, and a communication system which are capable of acquiring accurate optical ID information regardless of the position of the terminal device and the light receiving angle.
The terminal device, the communication method, and the communication system according to the present invention each sets a threshold value for the illuminance of a received optical signal by using a moving average method, a weighted moving average method, or an exponential moving average, so that the optical signal can be binarized with a threshold value according to a change in the position of the terminal device, the light receiving angle, or the like. Information from other sensors may be used to set the threshold value.

2. 发明申请

US20220303004A1 WIRELESS COMMUNICATION SYSTEM, WIRELESS TERMINAL EQUIPMENT, WIRELESS BASE STATION EQUIPMENT AND WIRELESS COMMUNICATION METHODS 有权
公开(公告)号：US20220303004A1
公开(公告)日：2022-09-22
申请号：US17632901
申请日：2019-08-07
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Tomohiro TANIGUCHI , Shinya TAMAKI , Ryota SHIINA , Kazutaka HARA , Tomoki MURAKAMI , Toshiro NAKAHIRA
IPC分类号： H04B10/11
摘要： According to the present disclosure, a wireless base station device delivers, to a wireless terminal device, an optical ID having a simple configuration in accordance with a pre-stored optical ID correspondence list; and the wireless terminal device selects connection authentication information corresponding to the received optical ID from a pre-stored optical ID correspondence list, and transmits predetermined authentication information to the wireless base station device through a predetermined connection method by RF wireless. Upon confirming that the received authentication information matches authentication information corresponding to an optical ID in the optical ID correspondence list, the wireless base station device permits information communication between the wireless terminal device and a higher-level network.

3. 发明申请

US20220216930A1 WIRELESS COMMUNICATION CHARACTERISTIC EVALUATION METHOD AND WIRELESS COMMUNICATION CHARACTERISTIC EVALUATION DEVICE 有权
公开(公告)号：US20220216930A1
公开(公告)日：2022-07-07
申请号：US17600563
申请日：2020-03-24
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Shoko SHINOHARA , Toshiro NAKAHIRA , Yasuhiko INOUE , Hirantha ABEYSEKERA , Koichi ISHIHARA , Takafumi HAYASHI , Yasushi TAKATORI
IPC分类号： H04B17/318 , H04W24/10 , H04B17/391
摘要： A wireless communication characteristic evaluation method for calculating a wireless communication characteristic of a wireless communication system in which a plurality of wireless communication terminals perform communication by transmitting or exchanging signals includes: an RSSI measurement step of measuring an RSSI measurement used for calculation of the wireless communication characteristic; and a calculation step of calculating the wireless communication characteristic based on the RSSI measurement and correction data of the RSSI measurement according to specifications of the wireless communication terminals or a correction calculation model.

4. 发明申请

US20220150715A1 WIRELESS BASE STATION INSTALLATION POSITION CALCULATION METHOD AND INSTALLATION POSITION CALCULATION DEVICE 有权
公开(公告)号：US20220150715A1
公开(公告)日：2022-05-12
申请号：US17440314
申请日：2020-03-16
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Toshiro NAKAHIRA , Hirantha ABEYSEKERA , Koichi ISHIHARA , Takafumi HAYASHI , Yasushi TAKATORI
IPC分类号： H04W16/20 , H04B17/391 , H04B17/27 , H04W84/12
摘要： This disclosure provides a method for calculating the installation number and installation positions of wireless base stations in accordance with the positions of wireless terminal stations within an installation area. First, when a predetermined number of wireless base stations are temporarily installed within the installation area, a wireless base station accommodating each wireless terminal station in a communication area is determined and the number of wireless base stations accommodating each wireless terminal station is calculated as a “number of conflicts”. Next, wireless base stations successively accommodating starting with an un-accommodated wireless terminal station of a small number of conflicts are successively selected as objects of installation. Then, the installation number and installation positions of the wireless base stations are calculated, with the temporarily installed wireless base stations other than the wireless base stations serving as the objects of installation being excluded.

5. 发明申请

US20210037448A1 WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION METHOD 有权
公开(公告)号：US20210037448A1
公开(公告)日：2021-02-04
申请号：US16969085
申请日：2019-02-12
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Toshiro NAKAHIRA , Tomoki MURAKAMI , Koichi ISHIHARA , Mamoru AKIMOTO , Takafumi HAYASHI
IPC分类号： H04W48/02 , H04W48/16 , H04W88/10 , H04W88/06
摘要： [Problem] In a terminal station and a base station, in which a plurality of wireless communication units supporting different communication performances are mounted, it is possible to select and switch wireless communication unit which responds to a congested condition of wireless communication and a wireless communication quality, and further improves a wireless resource usage efficiency.
[Solution] A wireless communication units individually supporting a plurality of communication performances and selecting a wireless communication unit with respect to a terminal station that has made a connection request according to a communication performance of the terminal station, wherein the base station includes a control unit that is configured to hold, for each of the wireless communication units, terminal station connection permission information indicating a permission condition as to whether permission of the connection request of the terminal station be granted according to the communication performance, to collate the communication performance of the terminal station with the terminal station connection permission information of the wireless communication unit to which the connection request was made, to establish a wireless connection with the terminal station in a case where the communication performance of the terminal station matches the permission condition, and, in a case where the communication performance does not match the permission condition, to direct the terminal station to another wireless communication unit whose permission condition matches the communication performance of the terminal station.

6. 发明申请

US20220264438A1 CONTROL STATION DEVICE AND WIRELESS TERMINAL STATION DEVICE 有权
公开(公告)号：US20220264438A1
公开(公告)日：2022-08-18
申请号：US17625435
申请日：2019-07-10
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Tomoki MURAKAMI , Toshiro NAKAHIRA , Ryota SHIINA , Kazutaka HARA , Tomohiro TANIGUCHI
IPC分类号： H04W48/18 , H04W48/16
摘要： A control station device includes a policy generation unit that calculates a priority order of a plurality of wireless communication systems having different types of systems on a basis of information acquired from a wireless terminal device that selects one wireless communication system from among the plurality of wireless communication systems to perform wireless communication, and generates a selection policy indicating the priority order of the plurality of wireless communication systems, and a policy delivery unit that delivers the selection policy indicating the priority order of the plurality of wireless communication systems to the wireless terminal device. With this configuration, an optimal wireless communication system that maximizes the performance of each wireless terminal device can be selected while reducing the load and calculation time imposed on the control station device.

7. 发明申请

US20220191931A1 WIRELESS COMMUNICATION METHOD AND BASE STATION 有权
公开(公告)号：US20220191931A1
公开(公告)日：2022-06-16
申请号：US17439892
申请日：2020-03-11
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Toshiro NAKAHIRA , Tomoki MURAKAMI , Hirantha ABEYSEKERA , Koichi ISHIHARA , Takafumi HAYASHI , Yasushi TAKATORI
IPC分类号： H04W74/08 , H04L5/00
摘要： A wireless communications method for connecting a base station with each of a plurality of terminal stations, the base station being equipped with a plurality of wireless communications units each configured to be able to selectively enable or disable an RTS/CTS function and a NoACK function and connectable with one or more of the terminal stations, includes: a collection step of collecting information as to whether each of the terminal stations is a hidden terminal and information about transmission characteristics of each of the terminal stations; a policy calculation step of calculating a setting policy for enabling or disabling the RTS/CTS function and the NoACK function for each of the wireless communications units and a switching policy for setting a condition for switching that one of the wireless communications units which is to be connected, for each of the terminal stations, based on the collected information; and a setting step of setting those of the terminal stations which are to be connected, for each of the wireless communications units based on the calculated setting policy and switching policy.

8. 发明申请

US20220141672A1 WIRELESS BASE STATION INSTALLATION POSITION CALCULATION METHOD AND WIRELESS BASE STATION INSTALLATION POSITION CALCULATION DEVICE 有权
公开(公告)号：US20220141672A1
公开(公告)日：2022-05-05
申请号：US17435488
申请日：2020-02-25
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Riku OMIYA , Toshiro NAKAHIRA , Hirantha ABEYSEKERA , Shoko SHINOHARA , Takafumi HAYASHI , Yasushi TAKATORI
IPC分类号： H04W16/18 , H04W16/24
摘要： A wireless base station setting position calculation method includes a step Si for assuming the setting area to be a rectangle, receiving an input of longitudinal and lateral lengths of a setting area and the number of wireless base stations to be set “s”, and determining one or more candidates of a number of divisions “d” of the setting area according to the number of wireless base stations “s”, a step S2 for representing the number of divisions “d” in a division ratio x:y and selecting, for each number of divisions “d”, according to the longitudinal and lateral lengths of the setting area, a division ratio at which diagonal line lengths of divided areas are minimized, a step S3 for performing, for each number of divisions “d”, adjustment of a division pattern until a difference m between the number of divisions “d” and the number of wireless base stations “s” decreases to 0, a step S4 for calculating, for each number of divisions “d”, a sum of the diagonal line lengths of the divided areas and selecting the division pattern with which the sum is minimized, and a step S5 for setting the wireless base stations in the centers of gravity of the divided areas in the division pattern selected in step S4.

9. 发明申请

US20210392524A1 RADIO BASE STATION USING DISTRIBUTED ANTENNA AND SCHEDULING METHOD 有权
公开(公告)号：US20210392524A1
公开(公告)日：2021-12-16
申请号：US17269285
申请日：2019-08-13
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Koichi ISHIHARA , Tomoki MURAKAMI , Hirantha ABEYSEKERA , Toshiro NAKAHIRA , Yasushi TAKATORI , Takafumi HAYASHI
IPC分类号： H04W24/08 , H04B7/024 , H04W52/36 , H04B7/0452
摘要： Provided is a wireless base station which uses distributed antennas and selects a combination of a plurality of wireless terminals and the distributed antennas of a wireless base station that performs multi-user transmission with respect to the plurality of wireless terminals in a multi-BSS wireless environment. The wireless base station includes: a scheduling unit that measures reception power (RSSI) from each wireless terminal at each of the distributed antennas and selects a combination of a plurality of wireless terminals and a plurality of antennas having approximately the same RSSIs in descending order for respective wireless terminals; and a transmission power control unit that sets minimum transmission power corresponding to the RSSI of the antenna when multi-user transmission is performed between the plurality of wireless terminals and the plurality of antennas combined by the scheduling unit.

10. 发明申请

US20210076369A1 RADIO COMMUNICATION METHOD, CENTRALIZED CONTROL STATION, AND BASE STATION 有权
公开(公告)号：US20210076369A1
公开(公告)日：2021-03-11
申请号：US16976458
申请日：2019-02-25
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Toshiro NAKAHIRA , Tomoki MURAKAMI , Hirantha ABEYSEKERA , Akiyoshi INOKI , Keisuke WAKAO
IPC分类号： H04W72/04 , H04W28/16 , H04W72/08
摘要： [Problem] A base station includes a plurality of radio communication units individually supporting a plurality of communication capabilities, and controls a terminal station to be connected with the base station to select a radio communication unit according to a communication scheme of the terminal station.
[Solution] Provided is a radio communication method of a radio communication system. The radio communication system includes a plurality of base stations mounted with a plurality of radio communication units for which different communication schemes are settable, a terminal station configured to perform radio communication in a certain communication scheme, and a centralized control station configured to control the plurality of base stations. The radio communication method includes calculating, by the centralized control station, a setting policy of a communication scheme for each of the plurality of radio communication units of each of the plurality of base stations and a switching policy for the terminal station and the radio communication unit, and notifying the base station of the policies, setting, by the base station, the setting policy and the switching policy, notified from the centralized control station, for the radio communication unit, collecting, by the base station, communication scheme information of communication schemes selectable by the terminal station from the terminal station to be connected, and selecting, by the base station, a radio communication unit to be connected by the terminal station in accordance with the communication scheme information, the setting policy, and the switching policy.

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