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1. 发明授权

US09344266B2 Transmission system, transmission apparatus, and clock synchronization method 有权
标题翻译：传输系统，传输设备和时钟同步方法
公开(公告)号：US09344266B2
公开(公告)日：2016-05-17
申请号：US14613443
申请日：2015-02-04
申请人： FUJITSU LIMITED
发明人： Ryuji Kayama , Hiroyuki Suzuki , Takashi Nakano , Nobuyuki Kobayashi , Akira Nozawa , Koji Suda
IPC分类号： H04L7/00 , H03K27/00
CPC分类号： H04L7/0016 , H04J3/0641
摘要： A transmission system includes: a first transmission apparatus to distribute a synchronization clock; and one or more second transmission apparatuses each to connect to the first transmission apparatus so as to synchronize with the synchronization clock from the first transmission apparatus, the second transmission apparatus including: a selection portion to select the first or second transmission apparatus of a connection destination so as to switch the synchronization clock; an output portion to generate an inquiry signal addressed to the first transmission apparatus via the second transmission apparatus of the connection destination selected; a determination portion to determine whether or not the inquiry signal generated by the second transmission apparatus is received; and a second control portion to determine that there is a synchronization clock loop having a loop path through the second transmission apparatus of the connection destination when the determination portion receives the inquiry signal.
摘要翻译：传输系统包括：第一发送装置，用于分配同步时钟; 以及一个或多个第二传输设备，每个连接到第一传输设备以与来自第一传输设备的同步时钟同步，第二传输设备包括：选择部分，用于选择连接目的地的第一或第二传输设备以切换同步时钟; 输出部，经由所选择的连接目的地的第二发送装置生成寻址到第一发送装置的查询信号; 确定部分，用于确定是否接收到由第二传输装置产生的查询信号; 以及第二控制部分，当确定部分接收到查询信号时，确定存在具有通过连接目的地的第二传输装置的环路径的同步时钟环路。

2. 发明申请

US20150280897A1 TRANSMISSION SYSTEM, TRANSMISSION APPARATUS, AND CLOCK SYNCHRONIZATION METHOD 有权
标题翻译：传输系统，传输设备和时钟同步方法
公开(公告)号：US20150280897A1
公开(公告)日：2015-10-01
申请号：US14613443
申请日：2015-02-04
申请人： FUJITSU LIMITED
发明人： RYUJI KAYAMA , HIROYUKI SUZUKI , TAKASHI NAKANO , Nobuyuki Kobayashi , AKIRA NOZAWA , Koji Suda
IPC分类号： H04L7/00
CPC分类号： H04L7/0016 , H04J3/0641
摘要： A transmission system includes: a first transmission apparatus to distribute a synchronization clock; and one or more second transmission apparatuses each to connect to the first transmission apparatus so as to synchronize with the synchronization clock from the first transmission apparatus, the second transmission apparatus including: a selection portion to select the first or second transmission apparatus of a connection destination so as to switch the synchronization clock; an output portion to generate an inquiry signal addressed to the first transmission apparatus via the second transmission apparatus of the connection destination selected; a determination portion to determine whether or not the inquiry signal generated by the second transmission apparatus is received; and a second control portion to determine that there is a synchronization clock loop having a loop path through the second transmission apparatus of the connection destination when the determination portion receives the inquiry signal.
摘要翻译：传输系统包括：第一发送装置，用于分配同步时钟; 以及一个或多个第二传输设备，每个连接到第一传输设备以与来自第一传输设备的同步时钟同步，第二传输设备包括：选择部分，用于选择连接目的地的第一或第二传输设备以切换同步时钟; 输出部，经由所选择的连接目的地的第二发送装置生成寻址到第一发送装置的查询信号; 确定部分，用于确定是否接收到由第二传输装置产生的询问信号; 以及第二控制部分，当确定部分接收到查询信号时，确定存在具有通过连接目的地的第二传输装置的环路径的同步时钟环路。

3. 发明申请

US20170155522A1 COMMUNICATION APPARATUS AND COMMUNICATION SYSTEM 审中-公开
公开(公告)号：US20170155522A1
公开(公告)日：2017-06-01
申请号：US15348221
申请日：2016-11-10
申请人： FUJITSU LIMITED
发明人： Hiroshi Fukaya , YUTAKA HAYAMA , NOBUYUKI FUKUCHI , HIROYUKI SUZUKI , SHIGEO HANDA , Koji Suda , TAKANOBU WAKABAYASHI , TOSHIYUKI SAKAMOTO
IPC分类号： H04L12/18 , H04L12/26 , H04L12/24 , H04L12/437
CPC分类号： H04L12/1868 , H04L12/1886 , H04L12/437 , H04L41/0816 , H04L43/0835
摘要： There is provided a communication apparatus of a plurality of communication apparatuses forming a ring network, the communication apparatus includes: a transmitter configured to transmit a multicast packet to a first communication apparatus of the plurality of communication apparatuses; a receiver configured to receive data of a reception failure of the multicast packet from the first communication apparatus; and a transmission controller configured to stop transmitting of the multicast packet from the transmitter according to the data of the reception failure.

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