公开(公告)号：US20090238089A1

公开(公告)日：2009-09-24

申请号：US12406558

申请日：2009-03-18

Applicant: KATSUYA KITAJIMA

Inventor： KATSUYA KITAJIMA

IPC: H04L12/26

CPC classification number: H04L45/28 ,  H04J3/085 ,  H04L49/1507 ,  H04L49/351 ,  H04L49/552 ,  H04L49/557

Abstract: The present invention, provides an Ethernet transmission apparatus comprising a first and second MEPs provided for each of transmission lines of operational and non-operational systems and for performing the transmission/reception of a frame to be transmitted over each transmission line in a duplexed manner, and a switching processing part for switching the MEP to be used for reception by using ETH-CC which is transmitted at regular intervals, in which the above described first and second MEPs are configured to be able to confirm each other's received content and are adapted to add a continuous sequence number to the ETH-CC when transmitting the ETH-CC, and when the sequence number of the received ETH-CC is smaller than the sequence number of the ETH-CC received by the operational system side, the MEP of the non-operational system side is adapted not to transmit the frame.

Abstract translation: 本发明提供了一种以太网传输装置，包括为操作和非操作系统的每个传输线路提供的第一和第二MEP，并且以双工方式执行要在每个传输线路上传输的帧的发送/接收， 以及切换处理部分，用于通过使用以规则间隔发送的ETH-CC来切换要用于接收的MEP，其中上述第一和第二MEP被配置为能够确认彼此的接收内容，并且适于 在发送ETH-CC时向ETH-CC添加连续序列号，当接收的ETH-CC的序列号小于由操作系统侧接收到的ETH-CC的序列号时， 非操作系统侧适于不发送帧。

公开(公告)号：US20090225653A1

公开(公告)日：2009-09-10

申请号：US12397032

申请日：2009-03-03

Applicant: KATSUYA KITAJIMA

Inventor： KATSUYA KITAJIMA

IPC: H04L12/24 ,  H04L12/26

CPC classification number: H04L1/0082 ,  H04L1/22 ,  H04L2001/0097

Abstract: There is provided a line status monitoring circuit, a node, a communication system, and a failure occurrence determining method which can detect occurrence of a failure in some of redundant lines between nodes. A line status monitoring circuit receives a frame through one of a plurality of lines from another node connected through a redundant transmission channel which is made redundant by the plurality of lines. The line status monitoring circuit includes a line-specific check frame monitoring unit 51. If a line-specific check frame having an added dedicated header corresponding to each of the plurality of lines is received through one of the plurality of lines from another node, the line-specific check frame monitoring unit 51 determines whether or not a further line-specific check frame corresponding to a frame for checking which is identical to a frame for checking which the line-specific check frame corresponds to is received through a predetermined number or more of lines within a predetermined time. Then, if the further line-specific check frame is not received through the predetermined number or more of lines within the predetermined time, the line-specific check frame monitoring unit 51 discards the frame for checking corresponding to the first received line-specific check frame.

Abstract translation: 提供了可以检测节点之间的一些冗余线路中的故障发生的线路状态监视电路，节点，通信系统和故障发生确定方法。 线路状态监视电路通过多条线路中的一条线从另一节点接收帧，该另一节点通过由多条线冗余的冗余传输信道连接。 线路状态监视电路包括行特定检查帧监视单元51.如果通过来自另一节点的多条线路中的一条线路接收到具有与多条线路中的每条线路相对应的添加的专用头部的线路特定检查帧，则 线路特定检查框监视单元51通过预定数量或更多的接收来确定与用于检查的帧相对应的帧的另外的行特定检查帧是否与用于检查行特定检查帧对应的帧相同 的线在预定时间内。 然后，如果在预定时间内没有通过预定数量或更多行接收到另外的行特定检查帧，则行专用检查帧监视单元51丢弃与第一接收的行特定检查帧相对应的检查帧 。

公开(公告)号：US20090213759A1

公开(公告)日：2009-08-27

申请号：US12050264

申请日：2008-03-18

Applicant: KATSUYA KITAJIMA

Inventor： KATSUYA KITAJIMA

IPC: H04L12/28

CPC classification number: H04L12/4675

Abstract: Upon producing a topology of a network including a plurality of nodes (L2SW-1 to L2SW-7) connected via the Ethernet, an NSM (101) collects, from each of the nodes, reception result information obtained by continuity check performed by each node, VLAN setting information, and MAC information of a port or ports, and produces the topology of the network for each of VLAN A and VLAN B.

Abstract translation: 在产生包括通过以太网连接的多个节点（L2SW-1至L2SW-7）的网络的拓扑结构中，NSM（101）从每个节点收集通过每个节点执行的连续性检查获得的接收结果信息 ，VLAN设置信息和端口的MAC信息，并为VLAN A和VLAN B各自生成网络拓扑。