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公开(公告)号：US20190116523A1
公开(公告)日：2019-04-18
申请号：US16217160
申请日：2018-12-12
Applicant: NEC Corporation
Inventor： Masakazu ONO , Shigeru ASAI , Kenji WAKAFUJI , Hideto SHIBOHTA , Shingo WATANABE , Masato KUDOU
Abstract: A node in a DTN includes: a memory; and a processor coupled to the memory and configured to execute data transfer processing for the DTN, wherein the data transfer processing including: receiving a plurality of bundles to be transferred to a same destination node on the DTN, each of the plurality of bundles including any one of a plurality of data segments acquired by dividing data of a content; deleting a part of the bundles from among the plurality of bundles without transferring to any other node or compressing a data size of a payload of the part of the bundles in accordance with a communication status of the DTN; and transmitting either a rest of the bundles excluding the deleted part of the bundles or the plurality of bundles including the part of the bundles having the compressed payloads to the DTN for transmitting to the destination node.
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公开(公告)号：US20170317736A1
公开(公告)日：2017-11-02
申请号：US15520446
申请日：2015-07-22
Applicant: NEC Corporation
Inventor： Kenji WAKAFUJI , Shigeru ASAI , Hideto SHIBOUTA , Masakazu ONO , Shingo WATANABE , Masato KUDOU
Abstract: A processor (102) implemented in a wireless terminal (1) is configured to perform gateway processing by executing a first application program (34) stored in a memory (19). The gateway processing includes: (a) receiving transmission data of other application programs (31-33); (b) selecting, from a plurality of communication interfaces (51-55), at least one communication interface to which the transmission data is to be transmitted; and (c) sending the transmission data to the selected at least one communication interface. This contributes, for example, to allowing an application program to easily communicate via a communication interface (i.e., communication path) conforming to a communication protocol that is additionally installed on a wireless terminal (e.g., smartphone).
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公开(公告)号：US20240429945A1
公开(公告)日：2024-12-26
申请号：US18734235
申请日：2024-06-05
Applicant: NEC Corporation
Inventor： Kenji WAKAFUJI , Kohei YOSHIDA
IPC: H04B1/00
Abstract: In one aspect of the present example embodiment, a modulation control apparatus includes at least one memory configured to store an instruction, and at least one processor configured to execute the instruction, wherein the processor, by executing the instruction, acquires data relating to a temperature during a predetermined period, and sets signal point arrangement used for modulation of a transmission signal in such a way that the signal point arrangement used for modulation of the transmission signal is switched to different signal point arrangement during the predetermined period, based on the data relating to the temperature.
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公开(公告)号：US20240405429A1
公开(公告)日：2024-12-05
申请号：US18656680
申请日：2024-05-07
Applicant: NEC Corporation
Inventor： Shingo WATANABE , Masakazu ONO , Kenji WAKAFUJI , Kohei YOSHIDA
Abstract: An antenna element receives a first radio wave and outputs a transmission signal, and receives a second radio wave and outputs a reception signal. A phase conversion unit applies a predetermined phase shift amount to a signal to be input and then output the signal. A switch connects the antenna element to one of the phase conversion unit and external receiver. When the first radio wave enters the antenna, the switch connects the antenna element to the phase conversion unit, and the transmission signal to which the predetermined phase shift amount has been applied is radiated from the antenna element. A third radio wave radiated from each of a plurality of RIS elements is deflected in a predetermined direction. When the second radio wave enters the antenna, the switch connects the antenna element to the external receiver, and the external receiver receives the reception signal.
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公开(公告)号：US20240214045A1
公开(公告)日：2024-06-27
申请号：US18390125
申请日：2023-12-20
Applicant: NEC Corporation
Inventor： Kazushi SUGYO , Shingo WATANABE , Kenji WAKAFUJI , Masakazu ONO
IPC: H04B7/06
CPC classification number: H04B7/0617
Abstract: To provide a communication terminal apparatus, a communication satellite apparatus, and a satellite communication system, capable of facilitating rapid determination of the direction of a beam. A communication terminal apparatus (10) is a communication terminal apparatus configured to communicate with a communication satellite apparatus (20) by means of a radio beam, the apparatus including: an antenna (11) configured to receive a plurality of beacons (Fa1 to Fa3) from at least one communication satellite apparatus, and to transmit and receive a directional radio beam; and at least one processor executing a control process of determining a plurality of candidate directions of the radio beam to be transmitted, on the basis of information included in the plurality of beacons.
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Patent Agency Ranking
公开(公告)号：US20240146405A1
公开(公告)日：2024-05-02
申请号：US18379961
申请日：2023-10-13
Applicant: NEC Corporation
Inventor： Kenji WAKAFUJI , Junichi FUNADA , Kohei YOSHIDA , Masakazu ONO , Kazuyuki HAYASHI
IPC: H04B7/185 , H04B7/0413
CPC classification number: H04B7/18534 , H04B7/0413
Abstract: A control apparatus capable of exhibiting the diversity effect in a hybrid mobile communication system using a terrestrial communication apparatus and a non-terrestrial communication apparatus is provided. A control apparatus according to the present disclosure includes a communication unit configured to communicate with a non-terrestrial communication apparatus and a terrestrial communication apparatus, an estimation unit configured to estimate a delay time of communication with a communication terminal through the non-terrestrial communication apparatus from communication with the communication terminal through the terrestrial communication apparatus, a control unit configured to, when MIMO communication is performed with the communication terminal using the non-terrestrial communication apparatus and the terrestrial communication apparatus, control an insertion timing of reference signals to be inserted into a first signal sequence transmitted to the non-terrestrial communication apparatus and a second signal sequence transmitted to the terrestrial communication apparatus, based on the delay time.
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公开(公告)号：US20240106109A1
公开(公告)日：2024-03-28
申请号：US18276187
申请日：2021-12-10
Applicant: NEC Corporation
Inventor： Koya TAKATA , Kenji WAKAFUJI , Fujio OKUMURA
CPC classification number: H01Q1/40 , H01Q1/24 , H01Q21/065 , H01Q21/20
Abstract: Please delete the Abstract of the Disclosure, and replace it with the following: Provided are a liquid crystal antenna capable of adapting a transmission/reception direction of a radio wave to 360° in a horizontal direction and reducing a size, a weight, and cost, and a method for manufacturing the liquid crystal antenna. A liquid crystal antenna of the present example embodiment includes a curved liquid crystal panel and is a phased array type, and the liquid crystal panel includes a liquid crystal layer and a plurality of antenna elements that transmit and receive signals having phases modulated by a variable dielectric constant element including the liquid crystal layer. The liquid crystal layer may be curved.
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公开(公告)号：US20170208503A1
公开(公告)日：2017-07-20
申请号：US15324035
申请日：2015-05-27
Applicant: NEC Corporation
Inventor： Masakazu ONO , Shigeru ASAI , Kenji WAKAFUJI , Hideto SHIBOHTA , Shingo WATANABE , Masato KUDOU
Abstract: A node in a DTN includes: a memory; and a processor coupled to the memory and configured to execute data transfer processing for the DTN, wherein the data transfer processing including: receiving a plurality of bundles to be transferred to a same destination node on the DTN, each of the plurality of bundles including any one of a plurality of data segments acquired by dividing data of a content; deleting a part of the bundles from among the plurality of bundles without transferring to any other node or compressing a data size of a payload of the part of the bundles in accordance with a communication status of the DTN; and transmitting either a rest of the bundles excluding the deleted part of the bundles or the plurality of bundles including the part of the bundles having the compressed payloads to the DTN for transmitting to the destination node.
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公开(公告)号：US20240178576A1
公开(公告)日：2024-05-30
申请号：US18517462
申请日：2023-11-22
Applicant: NEC Corporation
Inventor： Ryota NIHEI , Junichi FUNADA , Kenji WAKAFUJI , Kazuyuki HAYASHI , Kohei YOSHIDA , Shingo WATANABE , Kazushi SUGYO , Masakazu ONO , FUJIO OKUMURA
IPC: H01Q21/06 , G06F3/041 , G06F3/044 , G06F3/0488 , H01Q1/22
CPC classification number: H01Q21/065 , G06F3/0416 , G06F3/0446 , G06F3/0488 , H01Q1/22
Abstract: Provided is an antenna device including an antenna array including a plurality of patch antennas arrayed in a grid, a first switch group including a first switch disposed on a wiring line connecting two adjacent patch antennas, and a second switch group including a second switch disposed on a wiring line between an antenna assembly formed by at least four adjacent patch antennas and a signal source connected to at least one patch antenna constituting the antenna assembly.
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公开(公告)号：US20240103169A1
公开(公告)日：2024-03-28
申请号：US18276774
申请日：2022-01-13
Applicant: NEC Corporation
Inventor： Koya TAKATA , Masahiro KAIDEN , Kenji WAKAFUJI
IPC: G01S17/42
CPC classification number: G01S17/42
Abstract: an LEO satellite includes a light projecting element that emits emission light to another LEO satellite, an optical telescope, an optical phased array, a light receiving element that receives incident light from the other LEO satellite, a distance measurement unit that measures a distance to the other LEO satellite based on at least one of the emission light and the incident light, and a control unit. The control unit captures the other LEO satellites by scanning emission light using the optical telescope and receives incident light from the other LEO satellites for the other LEO satellites on the same orbital plane, and captures the other LEO satellites by scanning emission light using the optical phased array and receives incident light from the other LEO satellites for the other LEO satellites on different orbital planes.
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