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公开(公告)号：US20220174619A1
公开(公告)日：2022-06-02
申请号：US17536337
申请日：2021-11-29
Applicant: NEC Corporation
Inventor： Shingo WATANABE
Abstract: A radio communication apparatus makes it possible to prevent contents of communication from being intercepted. The radio communication apparatus includes a generation unit configured to generate a first unique word based on operation time information of the radio communication apparatus before communication with a radio communication apparatus is started, and generate, for each radio frame, an ith unique word (i: an integer equal to or greater than two) based on an (i-1)th unique word when the communication is started, and a transmitting unit configured to transmit a first radio frame including the first unique word and an ith radio frame including the ith unique word to the radio communication apparatus.
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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：US20170332216A1
公开(公告)日：2017-11-16
申请号：US15528183
申请日：2015-07-22
Applicant: NEC Corporation
Inventor： Shingo WATANABE , Shigeru ASAI , Hideto SHIBOUTA , Kenji WAKAFUJI , Masakazu ONO , Masato KUDOU
Abstract: A processor (103) in a wireless terminal (10) executes a communication service application to thereby perform an operation as a client for using a communication service. Further, in an abnormal situation where the wireless terminal (10) cannot access a server system (50) of an operator of the communication service, the processor (103) executes a predetermined activation procedure in the wireless terminal (10) without passing through the server system (50) to thereby activate a special account in the wireless terminal (10). This makes it possible, for example, to perform communication by the special account using an online service application installed in the wireless terminal during an abnormal situation where the wireless terminal cannot access the online service server.
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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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Patent Agency Ranking
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：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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9.发明公开公开(公告)号：US20240210523A1
公开(公告)日：2024-06-27
申请号：US18543034
申请日：2023-12-18
Applicant: NEC Corporation
Inventor： Shingo WATANABE , Masakazu Ono , Kenji Wakafuji
CPC classification number: G01S7/4008 , H01Q3/267 , H01Q15/16
Abstract: An amplifier amplifies an input signal. A radiation unit radiates a radio wave into space, based on the input signal amplified by the amplifier. A first reflection unit reflects the radio wave radiated from the radiation unit. A second reflection unit configured as a reconfigurable intelligent metasurface (RIS) reflecting plate reflects the radio wave from the first reflection unit and thereby transmits the radio wave to a transmission target. A control unit controls the second reflection unit. The second reflection unit reflects the radio wave at a target reflection angle that represents a reflection angle toward the transmission target, by reflecting the radio wave at a reflection angle acquired by adding an offset to a reflection angle specified by the control unit, based on the target reflection angle.
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公开(公告)号：US20240187171A1
公开(公告)日：2024-06-06
申请号：US18526336
申请日：2023-12-01
Applicant: NEC Corporation
Inventor： Shingo WATANABE , Kenji WAKAFUJI , Masakazu ONO
IPC: H04L5/00 , H04W72/0446 , H04W72/1268
CPC classification number: H04L5/0048 , H04W72/0446 , H04W72/1268
Abstract: A communication apparatus according to the present disclosure includes a receiver configured to receive upward data being transmitted from a terminal during an upward period from a terminal transmission start time to a terminal transmission end time in an upward slot, during an own apparatus reception period being equal in length to the upward period from an own apparatus reception start time being later than the terminal transmission start time by a propagation delay time; and a transmitter configured to transmit downward data during an own apparatus transmission period being equal in length to a downward period from an own apparatus transmission start time being earlier than a terminal reception start time by the propagation delay time, in such a way that the terminal receives the downward data during the downward period from the terminal reception start time to a terminal reception end time in a downward slot.
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