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公开(公告)号：US20240406952A1
公开(公告)日：2024-12-05
申请号：US18700904
申请日：2021-10-22
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Hiroko NOMURA , Kenji MIYAMOTO , Kota ASAKA
IPC: H04W72/1263 , H04W72/566
Abstract: A control device includes: a scheme determination unit configured to determine whether a packet to which an identifier of a priority is assigned is transmitted in conformity with a grant-free scheme; a time estimation unit configured to estimate a time in which a traffic volume of the packet is equal to or more than a threshold; and a transfer control unit configured to generate a control signal of a signal transfer device so that the signal transfer device transfers a packet that has arrived at the signal transfer device in the estimated time in accordance with the identifier of the priority. The scheme determination unit determines whether the repeated transmission of the packet is performed. The time estimation unit estimates a time in which the plurality of packets arrive at the signal transfer device a predetermined number of times at predetermined time intervals when it is determined that the repeated transmission of the packets is performed.
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公开(公告)号：US20240405909A1
公开(公告)日：2024-12-05
申请号：US18694838
申请日：2021-10-04
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Hiroko NOMURA , Hirotaka UJIKAWA , Kenji MIYAMOTO , Kota ASAKA , Yoshihito SAKAI , Tatsuya SHIMADA
IPC: H04J14/02
Abstract: A control device includes an acquisition unit that acquires information from a distributed station that notifies the information related to one or more events occurred within a predetermined time period at a predetermined notification frequency, an information analysis unit that executes analysis processing on the information, a frequency derivation unit that derives an occurrence frequency of the information, a load derivation unit that derives a load of analysis processing of the information, and a frequency control unit that controls the predetermined notification frequency with a frequency lower than the occurrence frequency as an upper limit on the basis of at least one of an analysis result of the information, an occurrence frequency of the information, and a load of analysis processing of the information.
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公开(公告)号：US20190273539A1
公开(公告)日：2019-09-05
申请号：US16344302
申请日：2017-11-06
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Kenji MIYAMOTO , Jun TERADA , Tatsuya SHIMIZU
IPC: H04B7/06 , H04B7/022 , H04W28/16 , H04B17/336 , H04B17/318
Abstract: A radio apparatus in a radio communication system that includes the radio apparatus and a signal processing apparatus that function as a base station, includes a channel estimation unit that, on the basis of a radio signal transmitted from a terminal apparatus, measures a reception quality of the radio signal; and a transmission control unit that, on the basis of the reception quality measured by the channel estimation unit, controls transmission, to the signal processing apparatus, of bit data or a log likelihood ratio obtained from the radio signal.
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公开(公告)号：US20190069278A1
公开(公告)日：2019-02-28
申请号：US16085444
申请日：2017-04-04
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Kenji MIYAMOTO , Jun TERADA , Shigeru KUWANO
CPC classification number: H04W72/042 , H04W16/02 , H04W80/02 , H04W88/08 , H04W92/16
Abstract: A wireless communication system includes a control device and at least one communication device. The control device includes a scheduler configured to generate control information for a process of a physical layer in wireless communication between the communication device and a terminal, an encoding unit configured to generate encoded data by performing encoding on data to be transmitted to the terminal on the basis of the control information, and a transmission unit configured to transmit the control information to the communication device when the control information is generated and transmits the encoded data to the communication device when the encoded data is generated. The communication device includes a reception unit configured to the control information and the encoded data from the control device; and a signal processing unit configured to perform signal processing for transmitting the encoded data received by the reception unit to the terminal on the basis of the control information received by the reception unit.
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5.发明申请公开(公告)号：US20240414646A1
公开(公告)日：2024-12-12
申请号：US18699762
申请日：2021-10-11
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Hirotaka UJIKAWA , Tatsuya SHIMADA , Yoshihito SAKAI , Kenji MIYAMOTO , Yuka OKAMOTO
IPC: H04W52/02
Abstract: A first transmission apparatus receives a data signal transmitted by a communication apparatus from a lower transmission apparatus sets the received data signal in a data unit, and transmits the data unit. A second transmission apparatus receives the data unit transmitted by the first transmission apparatus. An electric power controller calculates an arrival start timing that is a timing at which the data unit including a data signal transmitted from a communication apparatus starts to arrive at the second transmission apparatus on a basis of a code rate and a size of a data transmission block used when the communication apparatus transmits the data signal, and performs control such that a sleep state of a signal processor that performs processing on the data unit in the second transmission apparatus is ended before the arrival start timing.
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Patent Agency Ranking
公开(公告)号：US20190089562A1
公开(公告)日：2019-03-21
申请号：US16085057
申请日：2017-04-04
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Kenji MIYAMOTO , Jun TERADA , Shigeru KUWANO
IPC: H04L25/06 , H04L27/233
CPC classification number: H04L25/067 , H03M13/45 , H04L27/00 , H04L27/233
Abstract: A wireless communication system includes an RF reception unit configured to receive a radio signal from a terminal; a channel estimation unit configured to estimate channel information of a wireless transmission path with respect to the terminal on the basis of the radio signal received by the RF reception unit; a demodulation unit configured to perform soft decision demodulation on the radio signal on the basis of the channel information estimated by the channel estimation unit; a quantization unit configured to quantize a log likelihood ratio obtained through soft decision demodulation in the demodulation unit, on the basis of a statistical distribution determined using an average value of the log likelihood ratio determined in accordance with a modulation scheme used in wireless communication with the terminal and a variance of a log likelihood ratio obtained on the basis of the channel information; and a decoding unit configured to perform a decoding process on the log likelihood ratio quantized by the quantization unit.
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公开(公告)号：US20240323800A1
公开(公告)日：2024-09-26
申请号：US18578863
申请日：2021-08-06
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Kenji MIYAMOTO , Yoshihito SAKAI , Tatsuya SHIMADA
IPC: H04W40/12
CPC classification number: H04W40/12
Abstract: According to an aspect of the present invention, there is a wireless communication system including: a plurality of end wireless devices that include an antenna and transmit and receive signals to and from a wireless terminal which is a communication target; a plurality of transfer devices that transfer signals which are transmitted and received by the wireless terminal which is a communication target and the end wireless device; and a transfer management device that, in a case where communication status information indicating a status of communication between the wireless terminal and the end wireless devices is received, executes a transfer route control process of controlling paths between the plurality of transfer devices on the basis of the received communication status information, wherein the end wireless devices execute a switching process of controlling operations of the end wireless devices relating to communication between the end wireless devices and the wireless terminal on the basis of the communication status information, and the transfer management device receives the communication status information before the switching process is completed.
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公开(公告)号：US20200068659A1
公开(公告)日：2020-02-27
申请号：US16348462
申请日：2017-11-06
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Kenji MIYAMOTO , Jun TERADA , Tatsuya SHIMIZU
Abstract: A radio communication system includes a radio apparatus and a signal processing apparatus that function as a base station, and the radio apparatus includes a channel estimation unit that, on the basis of a radio signal transmitted from a terminal apparatus, estimates channel information relating to a radio transmission path between the radio apparatus and the terminal apparatus; a demodulation unit that performs soft-decision demodulation of the radio signal on the basis of the channel information estimated by the channel estimation unit; a decoding unit that decodes a log likelihood ratio obtained by the soft-decision demodulation and outputs a result of an error detection code obtained by the decoding; and a transmission control unit that, on the basis of the error detection code result, controls transmission, to the signal processing apparatus, of data obtained by the decoding.
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公开(公告)号：US20190238372A1
公开(公告)日：2019-08-01
申请号：US16343994
申请日：2017-11-06
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Kenji MIYAMOTO , Jun TERADA , Tatsuya SHIMIZU
CPC classification number: H04L25/03318 , H04B7/022 , H04L25/0204 , H04L25/0224 , H04L25/067 , H04L27/00 , H04W88/08 , H04W92/12
Abstract: A radio communication system includes a radio apparatus and a signal processing apparatus that function as a base station, and the radio apparatus includes a channel estimation unit that, on the basis of a radio signal transmitted from a terminal apparatus, estimates channel information relating to a radio transmission path between the radio apparatus and the terminal apparatus; a demodulation unit that performs soft-decision demodulation of the radio signal on the basis of the channel information estimated by the channel estimation unit; a signal switching unit that, depending on the terminal apparatus that transmitted the radio signal, switches an output destination of a log likelihood ratio obtained by the soft-decision modulation between either a first path passing through a decoding unit that decodes the log likelihood ratio or a second path not passing through the decoding unit; and a transmission unit that transmits a signal output from the first path or the second path to the signal processing apparatus.
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10.发明申请公开(公告)号：US20190028161A1
公开(公告)日：2019-01-24
申请号：US15501046
申请日：2016-03-04
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Kenji MIYAMOTO , Shigeru KUWANO , Jun TERADA
IPC: H04B7/0456 , H04B17/336 , H04B17/382 , H04L1/00 , H04L25/06 , H04B7/08
CPC classification number: H04B7/0482 , H04B7/08 , H04B7/0857 , H04B7/15 , H04B17/336 , H04B17/382 , H04L1/0054 , H04L25/067
Abstract: A relay apparatus includes: an estimation unit selects a code book number corresponding to a reception SNR range based on an estimated reception SNR value; a soft demodulation unit that performs soft demodulation on a received first signal to detect a likelihood of the received first signal; a first memory unit that stores a first quantization code book showing, for each code book number, a relationship between a quantization parameter and a likelihood quantization bit value; a quantization unit that refers the first quantization code book to obtain a relationship between a quantization parameter and a likelihood quantization bit value that corresponds to the selected code book number, and adaptively quantizes the detected likelihood by using the obtained relationship to obtain a likelihood quantization bit value; and a transmission unit that transmits, to the receiving apparatus, a second signal including the obtained likelihood quantization bit value and the selected code book number.
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