公开(公告)号：US20220338256A1

公开(公告)日：2022-10-20

申请号：US17619811

申请日：2019-06-21

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Hirantha ABEYSEKERA ,  Toshiro NAKAHIRA ,  Takafumi HAYASHI

IPC: H04W74/08 ,  H04W72/04

Abstract: In a wireless communication system wherein wireless terminal stations, each belonging to one of a plurality of wireless base stations, transmit on a shared frequency band, each of the wireless terminal stations includes means for notifying a control device of environmental information that indicates a communication status of the wireless terminal station itself via a wireless base station to which the wireless terminal station belongs, and for setting a transmission power value and a CCA threshold notified by the control device, and the control device includes means for calculating the transmission power value and the carrier sense threshold according to a predetermined control procedure based on the environmental information collected from the wireless terminal station via the wireless base station, and for notifying the wireless terminal station of the transmission power value and the carrier sense threshold via the wireless base station.

公开(公告)号：US20220240114A1

公开(公告)日：2022-07-28

申请号：US17603769

申请日：2020-04-17

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshiro NAKAHIRA ,  Tomoki MURAKAMI ,  Hirantha ABEYSEKERA ,  Koichi ISHIHARA ,  Takafumi HAYASHI ,  Yasushi TAKATORI

IPC: H04W24/08 ,  H04W24/10

Abstract: A measurement station collects radio base station performance information related to a radio communication performance of each radio base station, radio connection information related to a radio communication performance and a communication status of a corresponding radio terminal station, generates a measurement condition and an expected measurement result based on the radio base station performance information and the radio connection information, and notifies a measurement control signal corresponding to the measurement condition to the radio terminal station through the radio base station; the radio terminal station performs a communication setting of an own station based on the notified measurement control signal, and notifies a measurement preparation status to the measurement station; and the measurement station measures the radio communication performance by causing a flow of a measurement traffic to the radio terminal station through the radio base station, acquiring a measurement result, and determining whether the measurement result is within a range of the expected measurement result.

公开(公告)号：US20220232425A1

公开(公告)日：2022-07-21

申请号：US17439963

申请日：2020-03-11

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshiro NAKAHIRA ,  Tomoki MURAKAMI ,  Hirantha ABEYSEKERA ,  Koichi ISHIHARA ,  Takafumi HAYASHI ,  Yasushi TAKATORI

IPC: H04W28/22 ,  H04W4/06

Abstract: 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 configured to be able to select a plurality of different transmission rates and connectable with one or more of the terminal stations, includes: a collection step of collecting information about a transmission rate and multicast transmission frequency from each of the terminal stations; a policy calculation step of calculating a setting policy for setting a unicast transmission rate and a multicast transmission rate 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.

公开(公告)号：US20220201521A1

公开(公告)日：2022-06-23

申请号：US17602216

申请日：2020-03-24

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshiro NAKAHIRA ,  Tomoki MURAKAMI ,  Hirantha ABEYSEKERA ,  Koichi ISHIHARA ,  Takafumi HAYASHI ,  Yasushi TAKATORI

IPC: H04W24/08

Abstract: A radio base station device includes a plurality of radio units that perform communication with a radio terminal device, a packet data collection unit that collects packet data communicated by the plurality of radio units on the basis of a packet collection policy, a collected packet data analysis unit that performs analysis on packet data on the basis of a packet analysis policy, and transmits analysis result information to the control station device, and an information processing unit that transmits base station performance information and analysis result information to the control station device, and receives a packet collection policy and a packet analysis policy. The control station device includes a packet collection and analysis policy generation unit that generates and transmits the packet collection policy and the packet analysis policy to the radio base station device, on the basis of the base station performance information, and a data analysis unit that analyzes the analysis result information notified from the radio base station device.

公开(公告)号：US20220191723A1

公开(公告)日：2022-06-16

申请号：US17603427

申请日：2020-04-13

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshiro NAKAHIRA ,  Tomoki MURAKAMI ,  Hirantha ABEYSEKERA ,  Koichi ISHIHARA ,  Takafumi HAYASHI ,  Yasushi TAKATORI

IPC: H04W24/08

Abstract: A wireless communication system includes a plurality of wireless base stations and a measurement station, each wireless base station including a wireless communication unit, a wireless information collection unit, and a measurement result collection unit, the measurement station being configured to control the plurality of wireless base stations, wherein the measurement station generates a measurement condition based on wireless environment information collected by the wireless information collection unit of each wireless base station and notifies each wireless base station of a measurement control signal corresponding to the measurement condition, each wireless base station sends traffic addressed to a subordinate wireless terminal station or broadcast traffic at the same time in accordance with the notified measurement control signal, a measurement result collection unit of a wireless base station that is a measurement target measures wireless communication performance and notifies the measurement station of the measured performance, and the measurement station acquires the wireless communication performance collected by the wireless base station that is the measurement target.

公开(公告)号：US20220182887A1

公开(公告)日：2022-06-09

申请号：US17441743

申请日：2020-03-16

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshiro NAKAHIRA ,  Tomoki MURAKAMI ,  Hirantha ABEYSEKERA ,  Koichi ISHIHARA ,  Takafumi HAYASHI ,  Yasushi TAKATORI

IPC: H04W28/22

Abstract: The invention of the present application provides a transmission parameter control method in a radio communication system that performs, between a radio base station and a plurality of radio terminal stations, communication of a first method in which reception confirmation is enabled and communication of a second method in which reception confirmation is not possible. The radio base station selects transmission parameters including a transmission rate in the communication of the second method with the radio terminal stations, based on radio communication information in the communication of the first method with the radio terminal stations.

公开(公告)号：US20220174516A1

公开(公告)日：2022-06-02

申请号：US17600555

申请日：2020-03-24

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshiro NAKAHIRA ,  Shoko SHINOHARA ,  Hirantha ABEYSEKERA ,  Yasuhiko INOUE ,  Koichi ISHIHARA ,  Takafumi HAYASHI ,  Yasushi TAKATORI

IPC: H04W24/06

Abstract: A wireless performance evaluation method for performing wireless performance evaluation of a wireless network including wireless base stations and wireless terminal stations includes: a step 1 of, before performing wireless performance evaluation operation based on wireless performance evaluation information generated from wireless performance evaluation conditions, determining whether an existing wireless performance evaluation result of wireless performance evaluation operation that has been performed is substitutable or not; and a step 2 of, if the existing wireless performance evaluation result is substitutable, skipping arithmetic processing corresponding to the wireless performance evaluation information and substituting the existing wireless performance evaluation result. The step 1 determines that the existing wireless performance evaluation result is substitutable if various kinds of pieces of information included in the wireless performance evaluation information correspond to those corresponding to the existing wireless performance evaluation result or if a difference is such a difference that a result equal to the existing wireless performance evaluation result is obtained.

公开(公告)号：US20220159597A1

公开(公告)日：2022-05-19

申请号：US17440245

申请日：2020-03-11

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshiro NAKAHIRA ,  Tomoki MURAKAMI ,  Hirantha ABEYSEKERA ,  Koichi ISHIHARA ,  Takafumi HAYASHI ,  Yasushi TAKATORI

IPC: H04W56/00

Abstract: A wireless communications method for connecting a base station with each of a plurality of terminal stations set to differ in basic rate, the base station being equipped with a plurality of wireless communications units configured to be connectable with one or more of the terminal stations, includes: a collection step of collecting information about a transmission rate set for each of the terminal stations; a policy calculation step of calculating a setting policy for setting a basic rate permitted 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 each item of the collected information about transmission rates; 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.

公开(公告)号：US20220159476A1

公开(公告)日：2022-05-19

申请号：US17435589

申请日：2020-02-25

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshiro NAKAHIRA ,  Hirantha ABEYSEKERA ,  Shoko SHINOHARA ,  Yasuhiko INOUE ,  Koichi ISHIHARA ,  Takafumi HAYASHI ,  Daisuke GOTO ,  Yasushi TAKATORI

IPC: H04W16/18 ,  H04W24/02

Abstract: A method includes a step 1 of performing processing for determining wireless terminal stations that are inside cover areas of existing wireless base stations, and excluding the existing wireless base stations and the wireless terminal stations inside the cover areas from a wireless base station installation area, a step 2 of performing processing for optimizing, with respect to each first wireless terminal station that is outside the cover areas of the existing wireless base stations and has been left in the processing for excluding in the step 1, a combination of the first wireless terminal station and the closest additional wireless base station from which received power is the largest, and optimizing installation positions of additional wireless base stations, a step 3 of determining, with respect to the combinations of the additional wireless base stations and the first wireless terminal stations that were optimized in the step 2, whether wireless terminal stations are inside or outside cover areas of the additional wireless base stations, and performing processing for modifying an installation position of an additional wireless base station that accommodates a second wireless terminal station that is outside the cover area to increase the number of wireless terminal stations included in the cover areas.

公开(公告)号：US20230224737A1

公开(公告)日：2023-07-13

申请号：US18008724

申请日：2020-06-08

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshiro NAKAHIRA ,  Hirantha ABEYSEKERA ,  Koichi ISHIHARA ,  Takatsune MORIYAMA

IPC: H04W24/08

CPC classification number: H04W24/08

Abstract: An information processing method includes: an association step of associating pieces of wireless signal information that are respectively transmitted by a plurality of base stations and are measured at a plurality of measurement positions with cells of the base stations, for each of the measurement positions; and an interference calculation step of calculating interference between cells of the plurality of base stations based on the pieces of wireless signal information associated with the cells of the base stations.