公开(公告)号：US20190394653A1

公开(公告)日：2019-12-26

申请号：US16480039

申请日：2018-01-25

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Hirantha ABEYSEKERA ,  Tomoki MURAKAMI ,  Koichi ISHIHARA ,  Mamoru AKIMOTO ,  Yasushi TAKATORI

IPC: H04W16/10 ,  H04W24/02 ,  H04W28/24

Abstract: The each AP includes a control unit that detects, as the wireless environment information, a signal detection level for one or more neighboring APs positioned in the neighborhood of the AP and notifies the detected signal detection level to the central coordinator, and controls the ATT value by the setting in the central coordinator; and the central coordinator includes a parameter calculation unit that calculates the ATT value for each the APs, based on the signal detection level for each the neighboring wireless access point notified from the plurality of APs and based on an RSSI threshold at which each the APs is able to secure a prescribed service area.

公开(公告)号：US20210037448A1

公开(公告)日：2021-02-04

申请号：US16969085

申请日：2019-02-12

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshiro NAKAHIRA ,  Tomoki MURAKAMI ,  Koichi ISHIHARA ,  Mamoru AKIMOTO ,  Takafumi HAYASHI

IPC: H04W48/02 ,  H04W48/16 ,  H04W88/10 ,  H04W88/06

Abstract: [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.

公开(公告)号：US20190386724A1

公开(公告)日：2019-12-19

申请号：US16480122

申请日：2018-01-25

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Tomoki MURAKAMI ,  Koichi ISHIHARA ,  Yasushi TAKATORI ,  Hirantha ABEYSEKERA ,  Mamoru AKIMOTO ,  Masato MIZOGUCHI

IPC: H04B7/06 ,  H04W72/04 ,  H04W68/00

Abstract: Included are n antenna sets; n antenna switch units; n signal change units each changing a combination of one or more of a phase, a timing, a frequency, and a power of each signal transmitted/received in n antennas being selected from the antenna sets; a notification unit outputting a notification signal, in which control information on the antenna switch units and the signal change units according to a target terminal being a destination/source of the signals transmitted/received in the n antennas, are arranged according to a switch time of each of the antenna switch units and a change time of each of the signal change units; and a control unit sequentially starting control of switching by each of the antenna switch units and control of changing by each of the signal change units in order in which the control information on the each unit in the notification signal is notified.

公开(公告)号：US20190387482A1

公开(公告)日：2019-12-19

申请号：US16480075

申请日：2018-01-25

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Tomoki MURAKAMI ,  Koichi ISHIHARA ,  Yasushi TAKATORI ,  Hirantha ABEYSEKERA ,  Mamoru AKIMOTO

IPC: H04W52/24 ,  H04W52/36 ,  H04W16/28 ,  H04W88/08 ,  H04W52/14

Abstract: Provided are n antennas and n power change units; a power control unit; a power change management unit managing a common power change amount and an individual power change amount; a common power notification unit notifying the power control unit of the common power change amount in accordance with a target terminal; an individual power notification unit notifying the power control unit in advance of the individual power change amount in accordance with the each terminal at a prescribed timing, in which the power control unit stores the individual power change amount in a storage unit, and performs control of power changing by adding up the common power change amount in accordance with the target terminal, which is notified from the common power notification unit, and the individual power change amount.