公开(公告)号：US5164163A

公开(公告)日：1992-11-17

申请号：US406279

申请日：1989-09-12

申请人： Mamoru Aoki ,  Yohiaki Imoto ,  Hideki Sugimura ,  Keiichi Otani

发明人： Mamoru Aoki ,  Yohiaki Imoto ,  Hideki Sugimura ,  Keiichi Otani

IPC分类号： B01J8/04 ,  C01B3/38

CPC分类号： B01J8/0465 ,  C01B3/384 ,  B01J2208/00495 ,  C01B2203/0811 ,  C01B2203/0816 ,  C01B2203/0866

摘要： A hydrocarbon reforming apparatus having a furnace casing, a combustion gas passage formed in the furnace casing, a cylindrical reactor which is made up of multi-layered passages arranged concentrically around the combustion gas passage, with the multilayered passages being filled with catalysts, a combustion gas discharge passage communicating with the combustion gas passage, and a feedstock gas intake passage communicating with any one of the multilayered passages, characterized in that the combustion gas discharge passage is arranged on the inside of either of the outer passage of the multilayered passages or the feedstock gas intake passage, so that the combustion gas discharge passage is separated from the furnace casing.

公开(公告)号：US06813238B1

公开(公告)日：2004-11-02

申请号：US09421464

申请日：1999-10-19

申请人： Keiichi Otani ,  Takaya Yamamoto

发明人： Keiichi Otani ,  Takaya Yamamoto

IPC分类号： H04L1226

CPC分类号： H04L12/2801

摘要： A system for communication via cable-television communication lines includes a center device which generates a loop-detection packet for detecting a loop that is a defect of a network configuration, and a cable modem which is situated between said center device and a subscriber end, and detects the loop by regarding a receipt of the loop-detection packet from the subscriber end as a detection of the loop.

摘要翻译： 用于通过有线电视通信线路进行通信的系统包括生成用于检测作为网络配置的缺陷的环路的环路检测分组的中心设备，以及位于所述中心设备和用户端之间的有线调制解调器， 并且通过关于来自用户端的环路检测分组的接收来检测循环作为循环的检测。

公开(公告)号：US06449250B1

公开(公告)日：2002-09-10

申请号：US09170673

申请日：1998-10-13

申请人： Keiichi Otani ,  Takaya Yamamoto

发明人： Keiichi Otani ,  Takaya Yamamoto

IPC分类号： H04L1246

CPC分类号： H04L12/2876 ,  H04L12/2801 ,  H04L12/2856 ,  H04L12/2898 ,  H04L45/02 ,  H04L45/22 ,  H04L45/28

摘要： A method for switching a plurality of central devices including N working central devices and one protection central device of a N+1 redundancy structure provided on a LAN center, to the CATV transmission path side of which terminal devices are connected each through a cable modem, having router functions forming segments respectively at the sides of the LAN center and the CATV transmission path, and a working central device transmitting routing information of the segment on the CATV transmission path side to inform the LAN center segment of an existence of the segment on the transmission path side, so that the terminal devices are connected to appropriate networks via the LAN center, the method comprising the steps of maintaining control information of the plurality of working central devices and the protection central device to be monitored, detecting failure of a working central device by regularly polling the N working central devices, switching the detected, failed working central device to the protection central device to connect the plurality of central devices to the CATV transmission path, transferring the maintained control information of the failed central device to the protection central device, and setting the protection central device to an active status according to the transferred control information.

摘要翻译： 一种用于将包括N个工作中央设备的N个中央设备和LAN中心上提供的N + 1个冗余结构的一个保护中心设备的多个中央设备切换到通过电缆调制解调器连接各终端设备的CATV传输路径侧的方法， 路由器功能分别在LAN中心和CATV传输路径的侧面形成段，以及工作中心设备，在CATV传输路径侧发送段的路由信息​​，以通知LAN中心段上的段的存在 传输路径侧，使得终端设备经由LAN中心连接到适当的网络，该方法包括以下步骤：维护多个工作中央设备的控制信息和要监控的保护中心设备，检测工作中心的故障 设备通过定期轮询N个工作中央设备，切换检测到的故障工作中心 将所述多个中央设备连接到所述CATV传输路径，将所述故障中央设备的维护控制信息传送到所述保护中央设备，并且根据所传送的控制将所述保护中心设备设置为活动状态 信息。

公开(公告)号：US06351469B1

公开(公告)日：2002-02-26

申请号：US09038333

申请日：1998-03-11

申请人： Keiichi Otani ,  Masaharu Matsumoto ,  Koji Yano ,  Atsuo Serikawa ,  Takaya Yamamoto

发明人： Keiichi Otani ,  Masaharu Matsumoto ,  Koji Yano ,  Atsuo Serikawa ,  Takaya Yamamoto

IPC分类号： C11D1300

CPC分类号： H04N21/4341 ,  H04N7/17309 ,  H04N21/2368 ,  H04N21/2385 ,  H04N21/26216 ,  H04N21/8106

摘要： A TDMA in a CATV center and a CAU in a subscriber home communicate a B-ch idle/busy map indicating the idle/busy state of a B channel in synchronization with each other, so that the allocation of the B channel dedicated to sound and the C channel dedicated to data in a transmission frame can be dynamically changed according to the contents of the B-ch idle/busy map. Consequently, it becomes possible to effectively use a transmission bandwidth up to its maximum.

摘要翻译： CATV中心的TDMA和用户家庭中的CAU彼此同步地通信指示B信道的空闲/忙碌状态的B-ch空闲/忙碌映射，从而分配专用于声音的B信道和 专用于传输帧中的数据的C信道可以根据B-ch空闲/忙映射的内容动态地改变。 因此，可以有效地将传输带宽最大化地使用。