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公开(公告)号：US12225588B2
公开(公告)日：2025-02-11
申请号：US18659900
申请日：2024-05-09
Inventor： Tomoya Nunome , Takashi Iwai , Yoshio Urabe
Abstract: A wireless station that belongs to a communication cell includes a receiver which, in operation, receives a trigger frame transmitted from an access point that belongs to an interference cell and a controller which, in operation, determines, based on at least one parameter included in the trigger frame and reception power value of the trigger frame received at the wireless station, whether the wireless station is allowed to transmit to other wireless station that belongs to the communication cell, wherein the at least one parameter includes a value set based on transmit power value of the trigger frame transmitted from the access point.
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公开(公告)号：US12225518B2
公开(公告)日：2025-02-11
申请号：US17611081
申请日：2020-05-01
Inventor： Jun Minotani , Takashi Iwai , Tomofumi Takata , Yoshio Urabe
IPC: H04W72/121 , H04W72/20 , H04W84/12
Abstract: This base station is provided with: a control circuit that generates information relating to a terminal group among a plurality of terminals, said terminal group being a target of transmission by non-orthogonal multiple access; and a transmission circuit that transmits the information relating to the terminal group during a period in which control information addressed to the plurality of terminals is transmitted.
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3.发明申请公开(公告)号：US20250039025A1
公开(公告)日：2025-01-30
申请号：US18916185
申请日：2024-10-15
Inventor： Takashi Iwai , Tomohumi Takata , Hidetoshi Suzuki , Ayako Horiuchi
Abstract: In the multiple short sequence based SRS, multiple items of sequence data having a short sequence length corresponding to a partial band are used for transmitting SRS in discontinuous bands. In the multiple short sequence based SRS, a terminal specifies a frequency domain to be used for transmitting a reference signal using predetermined sequence data, applies a phase shift index associated with the specified frequency domain to the reference signal, and transmits the reference signal to which the phase shift index is applied by using the specified frequency domain.
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公开(公告)号：US11985513B2
公开(公告)日：2024-05-14
申请号：US18167771
申请日：2023-02-10
Inventor： Jun Minotani , Atsushi Matsumoto , Takashi Iwai , Tomofumi Takata , Yoshio Urabe
Abstract: Provided is a radio communication device capable of reducing interference, caused by non-SR transmission, with a basic service set (BSS) performing spatial reuse (SR) transmission. An SR transmission resource control unit (107) of the radio communication device (SR initiator) (100) determines transmission resources for an SR signal to be transmitted by means of SR to a second BSS other than a first BSS to which the radio communication device (100) belongs on the basis of radio quality information transmitted from other radio communication devices (SR responders) in the first BSS. A radio transmission/reception unit (101) transmits the SR signal by using the determined transmission resources.
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公开(公告)号：US11811430B2
公开(公告)日：2023-11-07
申请号：US18175835
申请日：2023-02-28
Inventor： Tadashi Yoshida , Ayako Horiuchi , Takashi Iwai , Yoshihiko Ogawa , Akihiko Nishio
CPC classification number: H04B7/0456 , H04B7/068 , H04B7/0632 , H04B7/0689 , H04B7/0691 , H04B7/0871 , H04B7/0874 , H04J13/00 , H04L5/0023 , H04L5/0051 , H04W72/04
Abstract: This invention is a transmission device capable of enhancing the reception characteristics of a terminal when employing transmit diversity using two antenna ports in an ePDCCH. In a base station (100) that transmits a reference signal to a terminal (200) using two antenna ports, a setting unit (102), on the basis of the reception quality of the terminal, sets as the aforementioned two antenna ports either a first antenna port pair for which DMRS (reference signals) do not undergo mutual code multiplexing, or a second antenna port pair for which the DMRS do undergo code multiplexing. A transmitter (109) transmits the DMRS from the two antenna ports set in the setting unit (102).
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Patent Agency Ranking
6.发明公开公开(公告)号：US20230318895A1
公开(公告)日：2023-10-05
申请号：US18331717
申请日：2023-06-08
Inventor： Takashi Iwai , Tomohumi Takata , Hidetoshi Suzuki , Ayako Horiuchi
CPC classification number: H04L27/2613 , H04L5/0007 , H04L5/0048 , H04L5/0053
Abstract: In the multiple short sequence based SRS, multiple items of sequence data having a short sequence length corresponding to a partial band are used for transmitting SRS in discontinuous bands. In the multiple short sequence based SRS, a terminal specifies a frequency domain to be used for transmitting a reference signal using predetermined sequence data, applies a phase shift index associated with the specified frequency domain to the reference signal, and transmits the reference signal to which the phase shift index is applied by using the specified frequency domain.
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公开(公告)号：US11751247B2
公开(公告)日：2023-09-05
申请号：US17852238
申请日：2022-06-28
Inventor： Tomoya Nunome , Takashi Iwai , Yoshio Urabe
CPC classification number: H04W74/0816 , H04W74/006 , H04W74/08 , H04W84/12 , H04W52/245
Abstract: A wireless station that belongs to a communication cell includes a receiver which, in operation, receives a trigger frame transmitted from an access point that belongs to an interference cell and a controller which, in operation, determines, based on at least one parameter included in the trigger frame and reception power value of the trigger frame received at the wireless station, whether the wireless station is allowed to transmit to other wireless station that belongs to the communication cell, wherein the at least one parameter includes a value set based on transmit power value of the trigger frame transmitted from the access point.
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公开(公告)号：US11659567B2
公开(公告)日：2023-05-23
申请号：US17200335
申请日：2021-03-12
Inventor： Tetsuya Yamamoto , Ayako Horiuchi , Takashi Iwai
IPC: H04L5/00 , H04W72/23 , H04L1/18 , H04L5/14 , H04L1/1829 , H04L69/324 , H04W28/04 , H04W88/02 , H04W88/08
CPC classification number: H04W72/23 , H04L1/18 , H04L1/1854 , H04L1/1858 , H04L1/1861 , H04L5/0044 , H04L5/0053 , H04L5/0055 , H04L5/1469 , H04L69/324 , H04W28/04 , H04L5/0094 , H04W88/02 , H04W88/08
Abstract: A terminal includes a receiver, which, in operation, receives time unit information related to an amount of an uplink time resource per a time unit, and receives a number of repetitions over a plurality of the time units, wherein the time unit includes a downlink time resource for a downlink signal and the uplink time resource for a response signal. The amount of the uplink time resource is expressed as a fixed number of consecutive symbols that remains the same number over the plurality of the time units over which the response signal is repeatedly transmitted. The terminal includes a transmitter, which, in operation, repeatedly transmits the response signal over the plurality of the time units.
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公开(公告)号：US11632153B2
公开(公告)日：2023-04-18
申请号：US17225029
申请日：2021-04-07
Inventor： Tadashi Yoshida , Ayako Horiuchi , Takashi Iwai , Yoshihiko Ogawa , Akihiko Nishio
Abstract: This invention is a transmission device capable of enhancing the reception characteristics of a terminal when employing transmit diversity using two antenna ports in an ePDCCH. In a base station (100) that transmits a reference signal to a terminal (200) using two antenna ports, a setting unit (102), on the basis of the reception quality of the terminal, sets as the aforementioned two antenna ports either a first antenna port pair for which DMRS (reference signals) do not undergo mutual code multiplexing, or a second antenna port pair for which the DMRS do undergo code multiplexing. A transmitter (109) transmits the DMRS from the two antenna ports set in the setting unit (102).
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公开(公告)号：US11611885B2
公开(公告)日：2023-03-21
申请号：US16969699
申请日：2019-01-10
Inventor： Jun Minotani , Atsushi Matsumoto , Takashi Iwai , Tomofumi Takata , Yoshio Urabe
Abstract: Provided is a radio communication device capable of reducing interference, caused by non-SR transmission, with a basic service set (BSS) performing spatial reuse (SR) transmission. An SR transmission resource control unit (107) of the radio communication device (SR initiator) (100) determines transmission resources for an SR signal to be transmitted by means of SR to a second BSS other than a first BSS to which the radio communication device (100) belongs on the basis of radio quality information transmitted from other radio communication devices (SR responders) in the first BSS. A radio transmission/reception unit (101) transmits the SR signal by using the determined transmission resources.
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