Patents by Inventor Shoko Shinohara
Shoko Shinohara has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 11432327Abstract: A format that includes a BSSID of a transmitting station within a preamble of the frame is an HE format, and a format that does not include a BSSID within the preamble but includes a BSSID in a MAC header is a Non-HE format; and a wireless station in the BSS includes a control part which checks a format of a frame received at a predetermined receiver sensitivity or above, and continues demodulation of the received frame if the format is HE format and the BSSID in the received frame is consistent with its own BSS, and stops the demodulation of the received frame if the HE format and the BSSID in the received frame is not consistent with its own BSS.Type: GrantFiled: June 29, 2020Date of Patent: August 30, 2022Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shoko Shinohara, Yasuhiko Inoue, Junichi Iwatani, Masato Mizoguchi
-
Publication number: 20220225137Abstract: A wireless communication characteristics evaluation method for evaluating wireless communication characteristics of a wireless communication system where a plurality of wireless communication terminals perform communication by transmitting or exchanging signals, the wireless communication characteristics evaluation method including: a step 1 of acquiring power and a band of an interference signal; a step 2 of calculating an interference band rate showing a rate of the band of the interference signal that overlaps with a band of a desired signal; a step 3 of calculating an interference power rate from interference power and the interference band rate and furthermore, calculating steady noise power from the interference power and the interference power rate; a step 4 of determining a real SINR from received power of the desired signal and the steady noise power; and a step 5 of determining wireless communication characteristics of the desired signal from the real SINR.Type: ApplicationFiled: March 24, 2020Publication date: July 14, 2022Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shoko SHINOHARA, Toshiro NAKAHIRA, Yasuhiko INOUE, Hirantha ABEYSEKERA, Koichi ISHIHARA, Takafumi HAYASHI, Yasushi TAKATORI
-
Publication number: 20220216930Abstract: 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.Type: ApplicationFiled: March 24, 2020Publication date: July 7, 2022Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shoko SHINOHARA, Toshiro NAKAHIRA, Yasuhiko INOUE, Hirantha ABEYSEKERA, Koichi ISHIHARA, Takafumi HAYASHI, Yasushi TAKATORI
-
Publication number: 20220217545Abstract: A station installation support system for performing a station installation design of a wireless base station satisfying a required performance and a parameter design includes a station installation support device that acquires a station installation calculation condition required to calculate a station installation of the wireless base station, a parameter calculation condition required to calculate a parameter of the wireless base station, a wireless performance evaluation condition required to evaluate a wireless performance, and a station installation evaluation condition required to evaluate the station installation and performs the station installation design and the parameter design, a wireless signal evaluation unit that outputs a wireless signal evaluation result corresponding to wireless signal evaluation information, a station installation calculation unit that outputs a station installation calculation result corresponding to station installation calculation information, a parameter calculation unType: ApplicationFiled: March 24, 2020Publication date: July 7, 2022Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Toshiro NAKAHIRA, Hirantha ABEYSEKERA, Shoko SHINOHARA, Koichi ISHIHARA, Yasuhiko INOUE, Takafumi HAYASHI, Yasushi TAKATORI
-
Publication number: 20220217504Abstract: A wireless communication system includes a plurality of transmission devices configured to receive broadcast/multicast data transmitted from a broadcast/multicast data transmission device, convert the broadcast/multicast data into wireless frames, and broadcast/multicast the wireless frames to a plurality of reception devices, and the plurality of reception devices configured to receive the wireless frames broadcasted/multicasted from the plurality of transmission devices and acquire the broadcast/multicast data, and each of the plurality of transmission devices includes a broadcast/multicast transmission unit configured to generate the same wireless frame from the broadcast/multicast data and broadcast/multicast the generated wireless frame at the same transmission timing using the same MCS.Type: ApplicationFiled: April 13, 2020Publication date: July 7, 2022Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Yasuhiko INOUE, Shoko SHINOHARA, Takafumi HAYASHI
-
Publication number: 20220201759Abstract: A predetermined STA includes a station information collection unit collecting from the STA itself and other STAs station information used for selection of STAs performing simultaneous transmission and for control of the simultaneous transmission, and a simultaneous-transmission request unit knowing occurrence of a QoS data frame based on the station information and transmitting a request frame requesting the simultaneous transmission to an AP. The AP includes a station information collection unit; a simultaneous-transmission determination unit selecting a combination of the STAs performing the simultaneous transmission based on the station information by reception of the request frame; and a trigger transmission unit transmitting to each of the STAs performing the simultaneous transmission a trigger frame instructing to performs the simultaneous transmission and including information necessary for controlling the simultaneous transmission.Type: ApplicationFiled: March 9, 2022Publication date: June 23, 2022Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shoko SHINOHARA, Yasuhiko INOUE, Akira KISHIDA, Riichi KUDO, Masato MIZOGUCHI
-
Publication number: 20220174516Abstract: 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.Type: ApplicationFiled: March 24, 2020Publication date: June 2, 2022Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Toshiro NAKAHIRA, Shoko SHINOHARA, Hirantha ABEYSEKERA, Yasuhiko INOUE, Koichi ISHIHARA, Takafumi HAYASHI, Yasushi TAKATORI
-
Publication number: 20220174505Abstract: There are provided a step 1 of, at a measurement point where a throughput of a wireless communication terminal under a new communication standard is to be acquired, measuring or calculating a wireless communication characteristic (throughput) of a wireless communication terminal under a current communication standard; a step 2 of acquiring parameters of a physical layer and a MAC layer at the time of measuring or calculating the wireless communication characteristic of the wireless communication terminal under the current communication standard; and a step 3 of, with the wireless communication characteristic (throughput) measured or calculated for the wireless communication terminal under the current communication standard and the parameters of the physical layer and the MAC layer at that time as inputs, calculating a wireless communication characteristic (throughput) corresponding to parameters of the wireless communication terminal under the new communication standard.Type: ApplicationFiled: March 24, 2020Publication date: June 2, 2022Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shoko SHINOHARA, Toshiro NAKAHIRA, Yasuhiko INOUE, Hirantha ABEYSEKERA, Koichi ISHIHARA, Takafumi HAYASHI, Yasushi TAKATORI
-
Publication number: 20220159476Abstract: 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 theType: ApplicationFiled: February 25, 2020Publication date: May 19, 2022Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Toshiro NAKAHIRA, Hirantha ABEYSEKERA, Shoko SHINOHARA, Yasuhiko INOUE, Koichi ISHIHARA, Takafumi HAYASHI, Daisuke GOTO, Yasushi TAKATORI
-
Publication number: 20220159644Abstract: In a wireless communication system in which a plurality of wireless stations perform transmission on a shared frequency band, the wireless stations each include means for notifying a wireless station control apparatus of capability and environment information that includes information about capability of a local wireless station and information about a surrounding environment, and the wireless station control apparatus includes control means for selecting, based on capability and environment information. collected from the wireless station, a frequency band to be used for the wireless station capable of using a plurality of frequency bands in accordance with a predetermined control index and setting the selected frequency band. Based on an area coverage rate of the wireless station as the control index, a frequency band with which. an area coverage rate of the wireless station having an area coverage rate of less than or equal to a predetermined threshold is improved is selected.Type: ApplicationFiled: February 25, 2020Publication date: May 19, 2022Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Hirantha ABEYSEKERA, Toshiro NAKAHIRA, Shoko SHINOHARA, Koichi ISHIHARA, Takafumi HAYASHI, Yasushi TAKATORI
-
Publication number: 20220149983Abstract: Provided is a wireless communication system that includes a transmission device configured to receive an input of group-addressed data transmitted from a specific source, convert the group-addressed data into wireless frames, and perform group-addressed transmission of the wireless frames; and a reception device configured to receive the wireless frames transmitted from the transmission device, and identify and acquire the group-addressed data of the specific source. The transmission device includes coding means for defining a plurality of wireless frames as a frame block, performing error correction coding on the frame block, and performing group-addressed transmission of the frame block, and the reception device includes decoding means for identifying the frame block from the received wireless frames, performing error correction decoding in units of frame block, and reconfiguring the group-addressed data of the specific source.Type: ApplicationFiled: February 25, 2020Publication date: May 12, 2022Inventors: Shoko SHINOHARA, Yasuhiko INOUE, Takafumi HAYASHI
-
Publication number: 20220141712Abstract: Provided is a wireless communication system that includes a transmission device configured to receives an input of group-addressed data transmitted from a specific source, convert the group-addressed data into wireless frames, and perform group-addressed transmission of the wireless frames; and a reception device configured to receive the wireless frames transmitted from the transmission device, and identify and receive the group-addressed data of the specific source, wherein a plurality of the transmission devices are provided, and each of the transmission devices is configured to perform group-addressed transmission of the wireless frames into which the group-addressed data is converted, and the reception device is configured to identify and receive the group-addressed data of the specific source from the wireless frames transmitted from the plurality of transmission devices, and perform diversity combining processing of combining the same pieces of group-addressed data.Type: ApplicationFiled: February 25, 2020Publication date: May 5, 2022Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shoko SHINOHARA, Yasuhiko INOUE, Takafumi HAYASHI
-
Publication number: 20220141672Abstract: 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 theType: ApplicationFiled: February 25, 2020Publication date: May 5, 2022Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Riku OMIYA, Toshiro NAKAHIRA, Hirantha ABEYSEKERA, Shoko SHINOHARA, Takafumi HAYASHI, Yasushi TAKATORI
-
Patent number: 11304234Abstract: A predetermined STA includes a station information collection unit collecting from the STA itself and other STAs station information used for selection of STAs performing simultaneous transmission and for control of the simultaneous transmission, and a simultaneous-transmission request unit knowing occurrence of a QoS data frame based on the station information and transmitting a request frame requesting the simultaneous transmission to an AP. The AP includes a station information collection unit; a simultaneous-transmission determination unit selecting a combination of the STAs performing the simultaneous transmission based on the station information by reception of the request frame; and a trigger transmission unit transmitting to each of the STAs performing the simultaneous transmission a trigger frame instructing to performs the simultaneous transmission and including information necessary for controlling the simultaneous transmission.Type: GrantFiled: February 11, 2020Date of Patent: April 12, 2022Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shoko Shinohara, Yasuhiko Inoue, Akira Kishida, Riichi Kudo, Masato Mizoguchi
-
Patent number: 11304233Abstract: A predetermined STA includes a station information collection unit collecting from the STA itself and other STAs station information used for selection of STAs performing simultaneous transmission and for control of the simultaneous transmission, and a simultaneous-transmission request unit knowing occurrence of a QoS data frame based on the station information and transmitting a request frame requesting the simultaneous transmission to an AP. The AP includes a station information collection unit; a simultaneous-transmission determination unit selecting a combination of the STAs performing the simultaneous transmission based on the station information by reception of the request frame; and a trigger transmission unit transmitting to each of the STAs performing the simultaneous transmission a trigger frame instructing to performs the simultaneous transmission and including information necessary for controlling the simultaneous transmission.Type: GrantFiled: February 11, 2020Date of Patent: April 12, 2022Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shoko Shinohara, Yasuhiko Inoue, Akira Kishida, Riichi Kudo, Masato Mizoguchi
-
Patent number: 11265802Abstract: Provided is a wireless communication system in which a plurality of basic service sets (BSSs) performing wireless transmission from a transmitting station to a destination station by performing access control based on CSMA/CA exist adjacent to each other, and in which wireless communication is performed by controlling a CCA threshold considering an interference power value between each BSS that uses the same channel, in which the transmitting station includes a control block determining the CCA threshold value according to the interference power value of the BSS considered as an interference source, calculating a SINR in the destination station according to the interference power value, determining a MCS which is a combination of a modulation scheme and a code rate according to the SINR, and performing the access control based on the CSMA/CA.Type: GrantFiled: August 15, 2016Date of Patent: March 1, 2022Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shoko Shinohara, Yasuhiko Inoue, Masato Mizoguchi
-
Patent number: 11172509Abstract: A predetermined STA includes a station information collection unit collecting from the STA itself and other STAs station information used for selection of STAs performing simultaneous transmission and for control of the simultaneous transmission, and a simultaneous-transmission request unit knowing occurrence of a QoS data frame based on the station information and transmitting a request frame requesting the simultaneous transmission to an AP. The AP includes a station information collection unit; a simultaneous-transmission determination unit selecting a combination of the STAs performing the simultaneous transmission based on the station information by reception of the request frame; and a trigger transmission unit transmitting to each of the STAs performing the simultaneous transmission a trigger frame instructing to performs the simultaneous transmission and including information necessary for controlling the simultaneous transmission.Type: GrantFiled: February 11, 2020Date of Patent: November 9, 2021Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shoko Shinohara, Yasuhiko Inoue, Akira Kishida, Riichi Kudo, Masato Mizoguchi
-
Publication number: 20210337599Abstract: Provided is a wireless communication system in which, based on a random access scheme, a transmission opportunity (TXOP) acquired by a wireless access point is granted to a wireless station when performing uplink data transmission from the wireless station to the wireless access point and the TXOP acquired by the wireless station is granted to the wireless access point when performing downlink data transmission from the wireless access point to the wireless station, the system includes a scheduling unit for TXOP granting determining one or more wireless stations having a quality of an uplink data transmission lower than a prescribed value as TXOP responders to which the wireless access point grants the TXOP, and determining one or more wireless stations having a quality of a downlink data transmission lower than the prescribed value as TXOP holders which grant the TXOP to the wireless access point.Type: ApplicationFiled: May 12, 2021Publication date: October 28, 2021Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Riichi KUDO, Hirantha Sithira ABEYSEKERA, Munehiro MATSUI, Shoko SHINOHARA, Yasushi TAKATORI, Takeo ICHIKAWA, Masato MIZOGUCHI
-
Patent number: 11026262Abstract: Provided is a wireless communication system in which, based on a random access scheme, a transmission opportunity (TXOP) acquired by a wireless access point is granted to a wireless station when performing uplink data transmission from the wireless station to the wireless access point and the TXOP acquired by the wireless station is granted to the wireless access point when performing downlink data transmission from the wireless access point to the wireless station, the system includes a scheduling unit for TXOP granting determining one or more wireless stations having a quality of an uplink data transmission lower than a prescribed value as TXOP responders to which the wireless access point grants the TXOP, and determining one or more wireless stations having a quality of a downlink data transmission lower than the prescribed value as TXOP holders which grant the TXOP to the wireless access point.Type: GrantFiled: August 15, 2016Date of Patent: June 1, 2021Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Riichi Kudo, Hirantha Sithira Abeysekera, Munehiro Matsui, Shoko Shinohara, Yasushi Takatori, Takeo Ichikawa, Masato Mizoguchi
-
Publication number: 20200329501Abstract: A format that includes a BSSID of a transmitting station within a preamble of the frame is an HE format, and a format that does not include a BSSID within the preamble but includes a BSSID in a MAC header is a Non-HE format; and a wireless station in the BSS includes a control part which checks a format of a frame received at a predetermined receiver sensitivity or above, and continues demodulation of the received frame if the format is HE format and the BSSID in the received frame is consistent with its own BSS, and stops the demodulation of the received frame if the HE format and the BSSID in the received frame is not consistent with its own BSS.Type: ApplicationFiled: June 29, 2020Publication date: October 15, 2020Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shoko SHINOHARA, Yasuhiko INOUE, Junichi IWATANI, Masato MIZOGUCHI