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1. 发明授权

US09967323B2 Message distribution system, distribution sequence determination device, distribution sequence determination method, and distribution sequence determination program 有权
公开(公告)号：US09967323B2
公开(公告)日：2018-05-08
申请号：US14758429
申请日：2013-10-11
申请人： NEC Corporation
发明人： Takahiro Shiroshima , Takeo Onishi
IPC分类号： H04L29/08 , H04L12/911 , H04L12/851
CPC分类号： H04L67/10 , H04L47/24 , H04L47/74 , H04L47/822 , H04W76/27 , H04W76/28
摘要： In order to reduce wasteful delays occurring when a mobile terminal whose RRC state is a state wherein communication is possible transfers in a temporarily stopped state, a distribution sequence determination device, which determines the distribution sequence for push messages transmitted to each of multiple terminals, determines the distribution sequence on the basis of whether each of the multiple terminals is in a state wherein communication is possible or is in a temporarily stopped state, so as to transmit the push messages to each of the multiple terminals in a distribution sequence in which terminals in a state wherein communication is possible are given priority over terminals in the temporarily stopped state.

2. 发明授权

US09866644B2 Terminal, message distribution system, message distribution method, and computer-readable medium 有权
公开(公告)号：US09866644B2
公开(公告)日：2018-01-09
申请号：US14432725
申请日：2013-10-02
申请人： NEC Corporation
发明人： Takeo Onishi , Takahiro Shiroshima , Masahiro Kawato , Tadayuki Oono
IPC分类号： G06F15/16 , H04L29/08 , H04L29/06 , H04L29/12 , H04W28/02 , H04W48/18 , H04W84/12
CPC分类号： H04L67/26 , H04L61/2503 , H04L61/6068 , H04L67/14 , H04L69/163 , H04W28/0215 , H04W48/18 , H04W84/12
摘要： A terminal, a message distribution system, a message distribution method, and a message distribution program are provided, which are capable of reliably delivering a push message to the terminal from a push server, regardless of a type of network utilized by the terminal, while reducing a processing load of the push server.The terminal includes a network status detection unit 11 which detects a status of a network connecting the terminal and a distribution device performing push-type message distribution, and a reception unit 12 which determines, based on a result of the detection, whether the terminal and the distribution device are located in a same IP address space, selects, if the terminal and the distribution device are not located in the same IP address space, a first communication method utilizing a pre-established TCP session, selects, if the terminal and the distribution device are located in the same IP address space, a second communication method utilizing a TCP session between the distribution device and the terminal, which is newly established by the distribution device when a message is distributed, and receives a message from the distribution device.

3. 发明授权

US10873873B2 Communication load estimation system, information processing device, method, and program 有权
公开(公告)号：US10873873B2
公开(公告)日：2020-12-22
申请号：US16065188
申请日：2016-12-19
申请人： NEC Corporation
发明人： Eiji Takahashi , Daisuke Ohta , Takeo Onishi , Takahiro Shiroshima
IPC分类号： H04W28/02 , H04W24/08 , H04B17/309 , H04L5/00
CPC分类号： H04W28/0284 , H04B17/309 , H04W24/08 , H04W28/02 , H04W28/0236 , H04L5/0048
摘要： A communication load estimation system is provided with a load estimation means 501 for estimating a communication load of a wireless base station to be an object of estimation, using at least: a network parameter which is a parameter concerning the number of antennas used for signal transmission of the wireless base station; a first quality measurement value which is a measurement value concerning a quality of communication with the wireless base station and which includes at least total reception power; and a second quality measurement value which is a measurement value concerning a quality of communication with the wireless base station and which includes at least a signal to interference noise ratio of a reference signal.

4. 发明授权

US09521059B2 Delivery device, communication system, load balancing method, and load balancing program 有权
标题翻译：交付设备，通信系统，负载平衡方法和负载均衡程序
公开(公告)号：US09521059B2
公开(公告)日：2016-12-13
申请号：US14439529
申请日：2013-10-17
申请人： NEC Corporation
发明人： Takeo Onishi , Takahiro Shiroshima , Masahiro Kawato , Tadayuki Oono
IPC分类号： H04L12/26 , H04L29/08 , H04L29/06 , H04L12/803 , H04L12/841
CPC分类号： H04L43/10 , H04L43/16 , H04L47/125 , H04L47/28 , H04L67/26 , H04L69/28
摘要： Provided are a delivery device, a communication system, a load balancing method, and a load balancing program that enable processing loads for maintaining connections with terminals to be balanced over time, and enable the real time property of message delivery to be maintained for an event notification service. The delivery device is provided with: a communication unit (11) that transmits, to each terminal connected to the delivery device, a keepalive signal to maintain the connection between the delivery device and each terminal when there is no data to be delivered; and a transmission time determination unit (12) that divides a period in which the communication unit (11) transmits a keepalive signal into a plurality of time slots, calculates the expected number of transmissions of the keepalive signal for each time slot on the basis of keepalive signal interval information, which represents the interval of the keepalive signal for each terminal, and, if the expected number of transmissions exceeds a predefined threshold value, transmits, to the communication unit (11), the keepalive signal for the portion exceeding the threshold value in the time slot prior to the time slot.
摘要翻译：提供了一种输送装置，通信系统，负载平衡方法和负载平衡程序，其能够处理负载以维持与终端的连接以随时间平衡，并且使得能够为事件维护消息传递的实时属性通知服务。传送装置设置有：通信单元（11），其在不存在要传送的数据的情况下，向连接到传送设备的每个终端发送保持信号，以保持传送设备与每个终端之间的连接; 以及传播时间确定单元（12），其将通信单元（11）将保持信号发送到多个时隙的周期进行分割，基于以下时间计算每个时隙的保持信号的预期发送次数保持信号间隔信息，其表示每个终端的保持信号的间隔，并且如果期望的传输数量超过预定阈值，则向通信单元（11）发送超过阈值的部分的保持信号在时隙之前的时隙中的值。

5. 发明申请

US20150256637A1 TERMINAL, MESSAGE DISTRIBUTION SYSTEM, MESSAGE DISTRIBUTION METHOD, AND COMPUTER-READABLE MEDIUM 有权
标题翻译：终端，消息分发系统，消息分发方法和计算机可读介质
公开(公告)号：US20150256637A1
公开(公告)日：2015-09-10
申请号：US14432725
申请日：2013-10-02
申请人： NEC CORPORATION
发明人： Takeo Onishi , Takahiro Shiroshima , Masahiro Kawato , Tadayuki Oono
IPC分类号： H04L29/08 , H04L29/12 , H04W28/02
CPC分类号： H04L67/26 , H04L61/2503 , H04L61/6068 , H04L67/14 , H04L69/163 , H04W28/0215 , H04W48/18 , H04W84/12
摘要： A terminal, a message distribution system, a message distribution method, and a message distribution program are provided, which are capable of reliably delivering a push message to the terminal from a push server, regardless of a type of network utilized by the terminal, while reducing a processing load of the push server.The terminal includes a network status detection unit 11 which detects a status of a network connecting the terminal and a distribution device performing push-type message distribution, and a reception unit 12 which determines, based on a result of the detection, whether the terminal and the distribution device are located in a same IP address space, selects, if the terminal and the distribution device are not located in the same IP address space, a first communication method utilizing a pre-established TCP session, selects, if the terminal and the distribution device are located in the same IP address space, a second communication method utilizing a TCP session between the distribution device and the terminal, which is newly established by the distribution device when a message is distributed, and receives a message from the distribution device.
摘要翻译：提供终端，消息分发系统，消息分发方法和消息分发程序，其能够从推送服务器可靠地向终端提供推送消息，而不管终端利用的网络的类型如何减少推送服务器的处理负载。终端包括网络状态检测单元11，其检测连接终端的网络的状态和执行推送型消息分发的分发设备;以及接收单元12，其基于检测结果来确定终端和分配设备位于相同的IP地址空间中，如果终端和分发设备不位于相同的IP地址空间中，则选择使用预先建立的TCP会话的第一通信方法，如果终端和分配装置位于相同的IP地址空间中，利用在分发装置与终端之间的TCP会话的第二通信方法，该分配装置和终端在分发消息时由分发装置新建立，并且从分发装置接收消息。

6. 发明公开

US20240127474A1 INFORMATION PROCESSING APPARATUS, POSITION ESTIMATION METHOD, AND NON-TRANSITORY COMPUTER-READABLE MEDIUM 审中-公开
公开(公告)号：US20240127474A1
公开(公告)日：2024-04-18
申请号：US18276329
申请日：2021-02-24
申请人： NEC Corporation
发明人： Takahiro Shiroshima
IPC分类号： G06T7/73 , G06T7/246
CPC分类号： G06T7/74 , G06T7/248 , G06T2207/30244
摘要： An information processing apparatus according to the present disclosure includes: a projection unit configured to arrange a predetermined number of virtual points in a front direction of an imaging device that captures a first image, by using an estimated position of the imaging device as a starting point, and project the virtual points onto each of a plurality of images used for generating an environment map being three-dimensional information; an image extraction unit configured to extract a second image from the plurality of images, based on a result of the projection of the virtual points; and an estimation unit configured to estimate, by using a feature point included in a target image being a target for estimating a position and a pose of an imaging device and a feature point included in the second image, aa position and a pose of the imaging device that captures the target image.

7. 发明公开

US20230419605A1 MAP GENERATION APPARATUS, MAP GENERATION METHOD, AND NON-TRANSITORY COMPUTER-READABLE MEDIUM STORING PROGRAM 审中-公开
公开(公告)号：US20230419605A1
公开(公告)日：2023-12-28
申请号：US18036624
申请日：2020-11-18
申请人： NEC Corporation
发明人： Takahiro Shiroshima
IPC分类号： G06T17/05 , G06T7/70 , G06V10/44
CPC分类号： G06T17/05 , G06T7/70 , G06V10/44
摘要： An object is to provide a map generation apparatus for improving the quality of an environment map created using virtual images. A map generation apparatus (10) according to the present disclosure includes: a map generation unit (11) configured to generate a three-dimensional map showing an environment around a photographing device by identifying shooting locations of a plurality of still images shot by the photographing device and restoring three-dimensional positions of feature points marked in each image of the plurality of the still images; a generation unit (12) configured to generate a virtual image when the three-dimensional positions of each of the feature points on the three-dimensional map corresponding to the feature points in the still images are shot from a virtual viewpoint; and an update unit (13) configured to update the three-dimensional map with reference to the virtual feature points in the virtual image.

8. 发明授权

US09882682B2 Message distributing system, message distributing apparatus, message distributing method and message distributing program 有权
公开(公告)号：US09882682B2
公开(公告)日：2018-01-30
申请号：US14900712
申请日：2014-06-20
申请人： NEC Corporation
发明人： Takahiro Shiroshima
IPC分类号： H04W76/04 , H04L1/18 , H04W52/02
CPC分类号： H04L1/1887 , H04L1/188 , H04W52/0225 , H04W76/27 , Y02B70/30 , Y02D70/1262
摘要： A message distributing system of the present invention includes: a mobile terminal; a service server which distributes a message to the mobile terminal; a message distributing apparatus which repeats the message and a request for distribution of the message that are provided by the service server; and a network apparatus which transmits the message, that is provided by the message distributing apparatus; to the mobile terminal. The message distributing apparatus sets a retransmission control time; which is used for controlling a time of retransmission of the message, on the basis of the request for distribution, and controls the time of retransmission to the network apparatus on the basis of the retransmission control time. According to the present invention, it is possible to solve a problem that a retransmission packet is transmitted while a packet is not lost and consequently a load of network becomes heavy, and a problem that a retransmission packet is not transmitted while a packet is lost and consequently an arrival of a push message becomes delayed.

9. 发明申请

US20150304201A1 DELIVERY DEVICE, COMMUNICATION SYSTEM, LOAD BALANCING METHOD, AND LOAD BALANCING PROGRAM 有权
标题翻译：交付设备，通信系统，负载均衡方法和负载平衡程序
公开(公告)号：US20150304201A1
公开(公告)日：2015-10-22
申请号：US14439529
申请日：2013-10-17
申请人： NEC CORPORATION
发明人： Takeo Onishi , Takahiro Shiroshima , Masahiro Kawato , Tadayuki Oono
IPC分类号： H04L12/26 , H04L12/803 , H04L29/08
CPC分类号： H04L43/10 , H04L43/16 , H04L47/125 , H04L47/28 , H04L67/26 , H04L69/28
摘要： Provided are a delivery device, a communication system, a load balancing method, and a load balancing program that enable processing loads for maintaining connections with terminals to be balanced over time, and enable the real time property of message delivery to be maintained for an event notification service. The delivery device is provided with: a communication unit (11) that transmits, to each terminal connected to the delivery device, a keepalive signal to maintain the connection between the delivery device and each terminal when there is no data to be delivered; and a transmission time determination unit (12) that divides a period in which the communication unit (11) transmits a keepalive signal into a plurality of time slots, calculates the expected number of transmissions of the keepalive signal for each time slot on the basis of keepalive signal interval information, which represents the interval of the keepalive signal for each terminal, and, if the expected number of transmissions exceeds a predefined threshold value, transmits, to the communication unit (11), the keepalive signal for the portion exceeding the threshold value in the time slot prior to the time slot.
摘要翻译：提供了一种输送装置，通信系统，负载平衡方法和负载平衡程序，其能够处理负载以维持与终端的连接以随时间平衡，并且使得能够为事件维护消息传递的实时属性通知服务。传送装置设置有：通信单元（11），其在不存在要传送的数据的情况下，向连接到传送设备的每个终端发送保持信号，以保持传送设备与每个终端之间的连接; 以及传播时间确定单元（12），其将通信单元（11）将保持信号发送到多个时隙的周期进行分割，基于以下时间计算每个时隙的保持信号的预期发送次数保持信号间隔信息，其表示每个终端的保持信号的间隔，并且如果期望的传输数量超过预定阈值，则向通信单元（11）发送超过阈值的部分的保持信号在时隙之前的时隙中的值。

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