公开(公告)号：US10111056B2

公开(公告)日：2018-10-23

申请号：US15023450

申请日：2014-12-01

Applicant: NEC Corporation

Inventor： Masato Kudou ,  Yoshinori Yamada

IPC: H04W40/20 ,  H04W84/18 ,  H04W4/12 ,  H04W84/12 ,  H04W84/22

Abstract: A server (1) receives a first message indicating that a final destination is a first mobile node. Next, the server (1) determines, from among a plurality of gateways (21 to 24) that provide connectivity with a network infrastructure (5) to a plurality of wireless ad-hoc networks (41 to 46), a first gateway to which the first message is to be transferred, based on a movement history of the first mobile node. Then, the server (1) attempts to transmit the first message to the first mobile node through the determined first gateway. It is thus possible to contribute, for example, to an improvement of probability of delivering messages addressed to mobile nodes within a wireless ad-hoc network.

公开(公告)号：US10128976B2

公开(公告)日：2018-11-13

申请号：US15327077

申请日：2015-05-27

Applicant: NEC Corporation

Inventor： Hideto Shibohta ,  Shigeru Asai ,  Kenji Wakafuji ,  Masakazu Ono ,  Shingo Watanabe ,  Masato Kudou

IPC: H04K3/00

Abstract: A radio wave jamming system (1) comprises a plurality of radio transmitters (10) that are adapted to transmit respective jamming signals (11) including substantially the same frequency. The plurality of radio transmitters (10) are further adapted to temporally change at least one of the transmission phases of the jamming signals (11), which are to be transmitted from the plurality of radio transmitters (10), so as to temporally change the phase differences among the jamming signals (11) when the jamming signals (11) transmitted from the plurality of radio transmitters (10) arrive at a particular site (50). Thus, for example, a radio wave jamming system that can be constituted by small-output radio devices can be provided.

公开(公告)号：US09497694B2

公开(公告)日：2016-11-15

申请号：US14389210

申请日：2012-11-29

Applicant: NEC Corporation

Inventor： Masato Kudou

IPC: H04W48/16 ,  H04W84/18 ,  H04W24/02 ,  H04W40/32 ,  H04W88/06 ,  H04W88/04 ,  H04W48/18

CPC classification number: H04W48/16 ,  H04W24/02 ,  H04W40/32 ,  H04W48/18 ,  H04W84/18 ,  H04W88/04 ,  H04W88/06

Abstract: A wireless communication device includes two wireless communication units, each switching one of a VHF band and a UHF band to another to conduct wireless communication; a determination unit which determines whether or not it is necessary to change a frequency band when one of the wireless communication units uses the VHF band to conduct the wireless communication, and further determines whether or not there is a wireless communication device that becomes unable to conduct wireless communication due to using the UHF band when the change is necessary; and a communication control unit which performs control to switch the band to the UHF band when it is determined that there is no wireless communication device which becomes unable to conduct wireless communication, and to leave the band as the VHF band when it is determined that there is a wireless communication device which becomes unable to conduct wireless communication.

Abstract translation: 无线通信设备包括两个无线通信单元，每个无线通信单元将VHF频带和UHF频带中的一个切换到另一个以进行无线通信; 确定单元，其确定当所述无线通信单元中的一个使用所述VHF频带进行无线通信时是否需要改变频带，并且还确定是否存在变得不能进行的无线通信设备 无线通信由于使用UHF频段需要更改时; 以及通信控制单元，当确定不存在无法进行无线通信的无线通信设备时，执行将频带切换到UHF频带的控制，并且当确定该频带在那里时将该频带留作VHF频带 是无法进行无线通信的无线通信装置。

公开(公告)号：US10779132B2

公开(公告)日：2020-09-15

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

IPC: G06F15/16 ,  H04W4/12 ,  H04W4/029 ,  H04M11/00 ,  H04W4/90 ,  H04L12/58 ,  H04W84/12 ,  H04W84/18 ,  H04W88/06

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.

公开(公告)号：US10708820B2

公开(公告)日：2020-07-07

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

IPC: H04W28/14 ,  H04W28/10 ,  H04W84/18 ,  H04L29/08 ,  H04W28/06

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.

公开(公告)号：US10375605B2

公开(公告)日：2019-08-06

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

IPC: H04W28/14 ,  H04W28/10 ,  H04W84/18 ,  H04L29/08 ,  H04W28/06

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.

公开(公告)号：US20140089476A1

公开(公告)日：2014-03-27

申请号：US14119930

申请日：2012-05-25

Applicant: NEC CORPORATION

Inventor： Tsuneo Nakata ,  Masato Kudou ,  Junichi Funada

IPC: H04L12/24

CPC classification number: H04L41/0813 ,  H04W24/02 ,  H04W84/18

Abstract: The present invention is provided to implement an automated setting change of network setting items on an ad hoc network which does not have a specific base station. A method of changing network setting for changing setting of a network where a plurality of terminals are connected, the method including the steps of: a request source terminal transmitting a request for setting change to a selected representative terminal; the selected representative terminal, upon receiving the request for setting change, transmitting a request for permission to at least a majority of representative terminals; the selected representative terminal transmitting a success notification to the request source terminal upon receiving a notification of permission from the majority of representative terminals in response to the request for permission; the request source terminal transmitting, to the plurality of terminals, an execution instruction including at least a content of setting change, upon receiving the success notification; and the terminal which has received the execution instruction changing the setting according to the content of setting change.

Abstract translation: 提供本发明以在不具有特定基站的自组织网络上实现网络设置项目的自动设置改变。 一种改变网络设置的方法，用于改变连接多个终端的网络的设置，所述方法包括以下步骤：请求源终端向所选择的代表终端发送设置改变的请求; 所选择的代表终端在接收到设置改变请求时，向至少大多数代表性终端发送许可请求; 所选择的代表终端响应于所述许可请求而从大多数代表终端接收到许可的通知，向所述请求源终端发送成功通知; 所述请求源终端在接收到所述成功通知时向所述多个终端发送至少包括设置改变内容的执行指令; 并且已经接收到执行指令的终端根据设置改变的内容改变设置。

公开(公告)号：US10560885B2

公开(公告)日：2020-02-11

申请号：US15559139

申请日：2016-03-16

Applicant: NEC Corporation

Inventor： Masato Kudou

IPC: H04W40/02 ,  H04W48/08 ,  H04W84/18 ,  H04W40/22 ,  H04W88/04 ,  H04W4/02

Abstract: A wireless communication device of the present invention has a device information storage part that stores device information identifying another wireless communication device that can establish wireless communication. When transmitting data, the wireless communication device attaches transmission source neighboring device information stored in the device information storage part of the device to the data, and transmits the data to another wireless communication device. When receiving data, the wireless communication device stores transmission source device information identifying another wireless communication device having transmitted the data into the device information storage part of the device. The wireless communication device determines whether to relay and transmit the received data to another wireless communication device on the basis of the result of comparison between the transmission source neighboring device information attached to the received data and receiver neighboring device information stored in the device information storage part of the device.

公开(公告)号：US10230449B2

公开(公告)日：2019-03-12

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

IPC: H04L12/801 ,  H04L5/14 ,  H04W84/18 ,  H04L12/28 ,  H04B7/15 ,  H04W48/16 ,  H04W88/06 ,  H04M1/725 ,  H04W88/16

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).

公开(公告)号：US09985751B2

公开(公告)日：2018-05-29

申请号：US15109482

申请日：2015-01-27

Applicant: NEC Corporation

Inventor： Masato Kudou ,  Hisashi Mizumoto

IPC: H04L1/16 ,  H04L1/18 ,  H04L12/883 ,  H04W84/18

CPC classification number: H04L1/1628 ,  H04L1/1671 ,  H04L1/1678 ,  H04L1/1829 ,  H04L49/9015 ,  H04L2001/0097 ,  H04W84/18

Abstract: A node device (1A) receives a second ACK list in communication with an adjacent node (1B) and updates a first ACK list and a first summary vector on the basis of the second ACK list. The first summary vector, which indicates messages stored in a message buffer of the node device (1A), is transmitted to the adjacent node (1B) prior to transmission of the messages in the communication with the adjacent node (1B). The first ACK list indicates ACK messages recognized by the node device (1A). The second ACK list indicates ACK messages recognized by the adjacent node (1B). Each ACK message represents a message of arrival at an ultimate destination node via a DTN (100). In this way, for example, a copy having the same content as a message having arrived at an ultimate destination node can be prevented from being scattered in the Disruption Tolerant Network (DTN).