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1. 发明专利

JP2013187615A Ad hoc network system and method for collecting meter reading information 有权
标题翻译： AD HOC网络系统和收集表读取信息的方法
公开(公告)号：JP2013187615A
公开(公告)日：2013-09-19
申请号：JP2012049191
申请日：2012-03-06
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NEMA DAIKI
IPC分类号： H04W84/18 , H04W4/04
CPC分类号： H04W24/02 , H04W24/08 , H04W40/20 , H04W40/24 , H04W84/12 , H04W84/18
摘要： PROBLEM TO BE SOLVED: To prevent the deterioration of the use efficiency of an upper-level repeater and a radio band near the upper-level repeater, as well as the overall efficiency of a mesh ad hoc radio network, constituted by the upper-level repeater and an ad hoc radio node, accompanying the increase of a data communication amount to the upper-level repeater and the ad hoc radio node near the upper-level repeater, in a system of the mesh ad hoc radio network for transmitting and receiving data through the upper-level repeater.SOLUTION: In the mesh ad hoc radio network, including an upper-level repeater 10 and ad hoc radio nodes 20-26 having a smart meter function, meter reading information collection executed by the upper-level repeater 10 is transferred from the upper-level repeater to one-hop ad hoc radio nodes 20-22, so as to improve the radio band use efficiency near the upper-level repeater 10.
摘要翻译：要解决的问题：为了防止上级中继器附近的上级中继器和无线电频带的使用效率的劣化以及由上级中继器构成的网状自组织无线电网络的总体效率中继器和特设无线电节点，伴随着在用于发送和接收数据的网状自组织无线电网络的系统中向上级中继器和上级中继器附近的上级中继器和ad hoc无线电节点增加数据通信量通过上位中继器。在网状自组织无线网络中，包括具有智能电表功能的上级中继器10和自组织无线电节点20-26，由上级中继器10执行的电表读取信息收集从上级中继器传送到一跳自组织无线电节点20-22，以便改善上级中继器10附近的无线电频带使用效率。

2. 发明专利

JP2010183494A Optical network system, and method of switching encryption key 审中-公开
标题翻译：光网络系统和切换加密密钥的方法
公开(公告)号：JP2010183494A
公开(公告)日：2010-08-19
申请号：JP2009027319
申请日：2009-02-09
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NEMA DAIKI , KAZAWA TORU , KURATA RYOSUKE
IPC分类号： H04L12/44 , H04L9/16
CPC分类号： H04L63/068
摘要： PROBLEM TO BE SOLVED: To solve the problem that signal interruption need be prevented by providing a buffer for a multicast signal in an ONU side and determining an encryption key switching while buffering the encrypted multicast signal.
SOLUTION: When receiving an encryption key generation request from an optical transmission line terminating device 20, an optical network terminating device 10 generates an encryption key and transmits the generated encryption key to the optical transmission line terminating device and when receiving a timing notification from the optical transmission line terminating device, it updates the encryption key of a belonging group. When receiving a report message from a STB 30 via the optical network terminating device, the optical transmission line terminating device analyzes the report message, holds the belonging group of the STB and the optical network terminating device in a second table, and transmits the encryption key generation request to the optical network terminating device and when receiving the encryption key from the optical network terminating device, it holds the encryption key in the second table and transmits the timing notification via which the encryption key becomes effective to the optical network terminating device.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：为了解决通过在ONU侧提供多播信号的缓冲器并且在缓存加密的多播信号的同时确定加密密钥切换来防止信号中断的问题。解决方案：当从光传输线路终端装置20接收加密密钥生成请求时，光网络终端装置10生成加密密钥，并将生成的加密密钥发送给光传输线终端装置，并且当接收到定时通知从光传输线终端装置，它更新所属组的加密密钥。当通过光网络终端设备从STB30接收到报告消息时，光传输线路终端设备分析报告消息，将STB的归属组和光网络终端设备保存在第二表中，并发送加密密钥对光网络终端装置的发送请求，并且当从光网络终端装置接收到加密密钥时，它将加密密钥保存在第二表中，并将加密密钥变为有效的定时通知发送到光网络终端装置。版权所有（C）2010，JPO＆INPIT

3. 发明专利

JP2014138307A Network system and network management device 有权
标题翻译：网络系统和网络管理设备
公开(公告)号：JP2014138307A
公开(公告)日：2014-07-28
申请号：JP2013006403
申请日：2013-01-17
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NEMA DAIKI , SUDO OSAMU , ASHI MASAHIRO
IPC分类号： H04L12/885 , H04L12/70
摘要： PROBLEM TO BE SOLVED: To set an appropriate buffer size for a termination node such that delays are few and frame omissions do not occur easily.SOLUTION: A network system comprises a node management device 10 and a plurality of notes including relay nodes 20-24 and termination nodes 30-32. Each of the nodes measures an inter-node delay time of a frame, and an intra-node delay time of the frame. The node management device 10 sets, for a path between the termination nodes, a fluctuation width of the delay time based on a standard deviation in the inter-node delay time of the frame and a standard deviation in the intra-node delay time of the frame measured between the termination nodes by each node, and calculates buffer sizes of the termination nodes corresponding to the fluctuation width of the delay time.
摘要翻译：要解决的问题：为终端节点设置适当的缓冲区大小，使得延迟很少，并且不容易发生帧遗漏。解决方案：网络系统包括节点管理设备10和包括中继节点20-24的多个备注和终止节点30-32。每个节点测量帧的节点间延迟时间和帧的节点内延迟时间。节点管理装置10针对终端节点之间的路径，基于帧的节点间延迟时间中的标准偏差和节点间延迟时间内的标准偏差来设置延迟时间的波动宽度由每个节点在终端节点之间测量的帧，并且计算对应于延迟时间的波动宽度的终止节点的缓冲器大小。

4. 发明专利

JP2012257116A Text and telephone conference system and text and telephone conference method 审中-公开
标题翻译：文本和电话会议系统和文本和电话会议方法
公开(公告)号：JP2012257116A
公开(公告)日：2012-12-27
申请号：JP2011129450
申请日：2011-06-09
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SUGAI HIDEYUKI , NEMA DAIKI , NOZUE DAIKI , HIRAO TSUTOMU , KAJIWARA TAKATOSHI
IPC分类号： H04M3/56
摘要： PROBLEM TO BE SOLVED: To provide a text and telephone conference system and method capable of allowing both of participants by text and participants by speech to discriminate who performs issuing.SOLUTION: A text and telephone conference system 100 acquires attribute information indicating whether apparatuses being used by conference participants other than an issuing person are PCs, IP telephones, or land-line phones with referring to a participant DB 102 when the participant performs issuing. When the issuing is performed by text from a PC, the system converts the text into speech data by speech synthesis means 104 through the use of the kind of a voice source corresponding to the issuing person from a voice source DB 106, distributes the converted speech data to the IP telephones and land-line phones, and also distributes text data from the original issuing person to the PCs of the other conference participants using the PCs. When the issuing is performed by speech, the speech is converted into a text by voice recognition means 105, the converted text is distributed to the PCs, and also the speech from the original issuing person is distributed to the IP telephones and land-line phones.
摘要翻译：要解决的问题：提供一种文本和电话会议系统和方法，其能够允许参与者通过文本和参与者通过语音来区分谁执行发行。解决方案：文本和电话会议系统100获取表示当参与者执行时参照参与者DB 102参考的参与者DB 102的指示是否是除了发行人之外的会议参与者正在使用的设备是PC，IP电话或陆线电话的属性信息发行。当通过PC的文本执行发行时，系统通过语音合成装置104通过使用来自语音源DB 106的与发行人对应的语音源的种类将文本转换成语音数据，将转换的语音分发向IP电话和陆上电话提供数据，并使用PC将原始发行人的文本数据分发给其他与会者的个人电脑。当通过语音执行发行时，通过语音识别装置105将语音转换成文本，将转换后的文本分发给PC，并将原始发行人的语音分发给IP电话和陆线电话。版权所有（C）2013，JPO＆INPIT

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