公开(公告)号：US07075944B1

公开(公告)日：2006-07-11

申请号：US09712225

申请日：2000-11-15

申请人： Kazuo Takagi

发明人： Kazuo Takagi

IPC分类号： H04J3/16

CPC分类号： H04L49/606 ,  H04J2203/0089 ,  H04L2012/5672 ,  H04Q11/0478

摘要： A frame for multiplexing multi-traffic frames of layers on a same carrier wave and an apparatus thereof is constituted by an overhead and a payload. The overhead is constituted by: a data length identifier indicating a frame or a payload length; a flow identifier indicating an attribute of the frame; and a frame header overhead error check (FHEC) storing a result obtained by converting bytes from the head to a specified M-th byte of the frame into a numerical value of n bytes according to a certain coding method. A maximum length of the payload is computed from the data length identifier of the overhead. In the payload, traffic for the layers 1 to 3 can be accommodated. Even if the ATM cell and the frame are multiplexed, since coding methods for the FHEC and the HEC are different, the ATM cell and the frame can be extracted individually.

摘要翻译： 用于在相同载波上多路复用多业务帧的帧及其装置由开销和有效载荷构成。 开销由以下构成：指示帧或有效载荷长度的数据长度标识符; 表示帧的属性的流标识符; 以及帧头开销错误检查（FHEC），其存储根据某种编码方法将从头的字节到帧的指定的第M个字节转换为n个字节的数值而获得的结果。 从开销的数据长度标识符计算有效载荷的最大长度。 在有效载荷中，可以容纳层1至3的业务。 即使ATM信元和帧被复用，由于FHEC和HEC的编码方法不同，因此可以单独提取ATM信元和帧。

公开(公告)号：US09300558B2

公开(公告)日：2016-03-29

申请号：US13823534

申请日：2011-09-21

申请人： Masaki Umayabashi ,  Zhenlong Cui ,  Kazuo Takagi

发明人： Masaki Umayabashi ,  Zhenlong Cui ,  Kazuo Takagi

IPC分类号： H04L12/70 ,  H04L12/26 ,  H04L12/823 ,  H04L12/841

CPC分类号： H04L43/0852 ,  H04L47/28 ,  H04L47/32

摘要： The present invention measures 1-way delay without equipping all nodes with special functionality in a situation in which time has not been synchronized. The delay measurement system of the present invention has a transmission origin node and a transmission destination node which is connected to the transmission origin node through a network including relay nodes, and measures the delay time from the transmission origin node to the transmission destination node direction, wherein the transmission origin node generates a clock. On the basis of the generated clock, delay measurement packets are generated at regular periods. The generated delay measurement packets are transmitted to the transmission destination node. The transmission destination node selects the delay measurement packets from among the received frames. The delay received by the delay measurement packets in the network between the transmission origin node to the node itself is measured.

摘要翻译： 本发明在时间尚未同步的情况下测量单向延迟而不对具有特殊功能的所有节点进行装配。 本发明的延迟测量系统具有通过包括中继节点的网络连接到发送源节点的发送源节点和发送目的地节点，并且测量从发送起始节点到发送目的地节点方向的延迟时间， 其中发送源节点生成时钟。 在生成的时钟的基础上，定期生成延迟测量数据包。 生成的延迟测量分组被发送到发送目的地节点。 发送目的地节点从接收到的帧中选择延迟测量分组。 测量由发送源节点到节点本身之间的网络中的延迟测量分组所接收的延迟。

公开(公告)号：US08737238B2

公开(公告)日：2014-05-27

申请号：US13377241

申请日：2010-06-11

申请人： Masaki Umayabashi ,  Zhenlong Cui ,  Hiroyuki Takagi ,  Kazuo Takagi

发明人： Masaki Umayabashi ,  Zhenlong Cui ,  Hiroyuki Takagi ,  Kazuo Takagi

IPC分类号： H04L12/54 ,  H04B7/14 ,  H04W40/22 ,  H04W28/02 ,  H04L12/26 ,  H04W72/10

CPC分类号： H04L12/26 ,  H04L12/54 ,  H04L43/00 ,  H04L43/0864 ,  H04L43/0882 ,  H04L43/10 ,  H04L45/26 ,  H04L47/10 ,  H04W28/02 ,  H04W72/10

摘要： An inspection signal to inspect forward-path or return-path communication, is transmitted from a reference node of a network. A response signal is transmitted in a priority class from a node of a forward path to the reference node. In the case of inspection of return-path communication, a replica of the response signal is transmitted in a non-priority class from the node of the forward path to the return path, and the node that receives the replica of the response signal transfers the replica in a priority class to the reference node. In the case of inspection of forward-path communication, a replica of the inspection signal is transmitted in a non-priority class from the node of the forward path to the forward path, and a replica of the response signal is transmitted in a priority class from the node that receives a replica of the inspection signal to the reference node.

摘要翻译： 从网络的参考节点发送检查前向路径或返回路径通信的检查信号。 响应信号在优先等级中从正向路径的节点发送到参考节点。 在检查返回路径通信的情况下，将响应信号的副本从正向路径的节点发送到非优先级类别到返回路径，并且接收响应信号的副本的节点将 在优先级类中的副本到引用节点。 在检查前向通信的情况下，将检查信号的副本从正向路径的节点向前向路径发送到非优先级等级，并且将响应信号的副本以优先级等级发送 从接收检查信号的副本的节点到参考节点。

公开(公告)号：US08675665B2

公开(公告)日：2014-03-18

申请号：US12678167

申请日：2008-09-12

申请人： Masaki Umayabashi ,  Hideo Yoshimi ,  Zhenlong Cui ,  Kazuo Takagi ,  Atsushi Iwata

发明人： Masaki Umayabashi ,  Hideo Yoshimi ,  Zhenlong Cui ,  Kazuo Takagi ,  Atsushi Iwata

IPC分类号： H04L12/28

CPC分类号： H04J3/0632 ,  H03L7/06 ,  H04L69/28

摘要： The clock synchronization accuracy between a master node and a slave node is stably measured. The slave node synchronizes its own clock with the clock of the master node by means of the packets transmitted from the master node. It reproduces the clock of the slave node by means of the transmitted packets, accumulates information on the transmitted packets and the clock of the slave node and performs clock synchronization on the basis of the accumulated information.

摘要翻译： 稳定地测量主节点和从节点之间的时钟同步精度。 从节点通过从主节点发送的分组将其自己的时钟与主节点的时钟同步。 它通过发送的分组再现从节点的时钟，累积关于发送的分组的信息和从节点的时钟，并根据累积的信息执行时钟同步。

公开(公告)号：US20120020232A1

公开(公告)日：2012-01-26

申请号：US13182362

申请日：2011-07-13

申请人： DAISUKE YOSHIOKA ,  Masaki Umayabashi ,  Kazuo Takagi ,  Hiroshi Tanaka ,  Zhenlong Cui

发明人： DAISUKE YOSHIOKA ,  Masaki Umayabashi ,  Kazuo Takagi ,  Hiroshi Tanaka ,  Zhenlong Cui

IPC分类号： H04L12/26

CPC分类号： H04L43/10 ,  H04L43/0829

摘要： A communication apparatus including: a counter storage unit storing a reception counter value of the apparatus when a specific frame is received; a measurement unit measuring the number of frame losses occurring between the apparatus and the preceding apparatus on the basis of the reception counter value of the apparatus, a transmission counter value of a source apparatus of the specific frame included in the specific frame and the total number of frame losses between the source apparatus and the preceding apparatus of the apparatus, when the specific frame is received; a transmission unit transmitting the specific frame; and a frame control unit adding, to the specific frame, loss information associating the number of frame losses occurring between the apparatus and the preceding apparatus with an identifier of the apparatus and forwarding the specific frame to the transmission unit, when the frame loss occurs, and forwarding the specific frame to the transmission unit without adding the loss information to the specific frame, when no frame loss occurs.

摘要翻译： 一种通信装置，包括：计数器存储单元，当接收到特定帧时，存储所述装置的接收计数值; 测量单元，基于设备的接收计数器值测量装置与先前装置之间发生的帧丢失的数量，包括在特定帧中的特定帧的源装置的发送计数器值和总数 当接收到特定帧时，源设备和设备的先前设备之间的帧丢失; 发送单元，发送特定帧; 以及帧控制单元，在发生帧丢失时，向所述特定帧添加将所述装置与前一装置之间出现的帧丢失数与所述装置的标识符相关联并将所述特定帧转发到所述传输单元的丢失信息， 并且当没有发生帧丢失时，将特定帧转发到发送单元，而不将丢失信息添加到特定帧。

公开(公告)号：US20110228834A1

公开(公告)日：2011-09-22

申请号：US13129755

申请日：2009-11-20

申请人： Masaki Umayabashi ,  Zhenlong Cui ,  Kazuo Takagi

发明人： Masaki Umayabashi ,  Zhenlong Cui ,  Kazuo Takagi

IPC分类号： H04L7/00 ,  H04B17/00

CPC分类号： H04J3/0664 ,  H03L7/08 ,  H04J3/0632

摘要： A clock synchronization system synchronizes a clock of a slave node with a clock of a master node. The master node includes a packet transmitting unit that transmits a packet including a time stamp (TS) to the slave node. The slave node includes: a packet receiving unit that receives the packet transmitted from the master node; a packet filter unit that calculates as a value of delay of the packet a difference between a TS on the clock of the slave node when the packet is received and the TS of the packet received, corrects the value of the delay of the packet or a threthold for the delay of the packet, and performs filter processing on the packet received from the packet receiving unit based on the value of the delay of the packet and the threshold for the delay of the packet; and a phase synchronization unit that outputs the clock of the slave node based on the TS included in the packet employed.

摘要翻译： 时钟同步系统将从节点的时钟与主节点的时钟同步。 主节点包括分组发送单元，该分组发送单元将包括时间戳（TS）的分组发送到从节点。 从节点包括：分组接收单元，接收从主节点发送的分组; 分组过滤器单元，当分组接收到从属节点的时钟上的TS与接收到的分组的TS之间的时间差时，计算分组的延迟值，校正分组的延迟的值或 考虑到分组的延迟，并且基于分组的延迟的值和分组的延迟的阈值对从分组接收单元接收的分组执行滤波处理; 以及相位同步单元，其基于包含在所使用的分组中的TS输出从节点的时钟。

公开(公告)号：US07831715B2

公开(公告)日：2010-11-09

申请号：US11766170

申请日：2007-06-21

申请人： Hideo Yoshimi ,  Nobuyuki Enomoto ,  Zhenlong Cui ,  Kazuo Takagi ,  Atsushi Iwata

发明人： Hideo Yoshimi ,  Nobuyuki Enomoto ,  Zhenlong Cui ,  Kazuo Takagi ,  Atsushi Iwata

IPC分类号： G06F15/16

CPC分类号： H04L67/141 ,  H04L67/14 ,  H04L67/143 ,  H04L69/16 ,  H04L69/163

摘要： An object of the present application is to provide a technology that can achieve packet communication between terminals connected to the Internet by way of a relay server in a faster and safer manner. The system of present application is a communication system characterized in that, on receipt of a start-connection message, a relay server having the lowest load is searched, and communication is achieved by way of the relay server found.

摘要翻译： 本申请的目的是提供一种技术，其可以通过中继服务器以更快和更安全的方式实现连接到因特网的终端之间的分组通信。 本申请的系统是一种通信系统，其特征在于，在接收到起始连接消息时，搜索具有最低负载的中继服务器，并且通过找到的中继服务器实现通信。

公开(公告)号：US20090257458A1

公开(公告)日：2009-10-15

申请号：US12420532

申请日：2009-04-08

申请人： Zhenlong Cui ,  Masaki Umayabashi ,  Kazuo Takagi

发明人： Zhenlong Cui ,  Masaki Umayabashi ,  Kazuo Takagi

IPC分类号： H04J3/06

CPC分类号： H04J3/0632

摘要： A clock synchronization system includes a master node; a PSN (Packet Switched Network); and a slave node configured to synchronize a recovery clock signal in the slave node with a clock signal in the master node by using packets periodically received from the master node through the PSN. The slave node includes: a buffer section having a buffer and configured to temporarily store the packets received from the master node in the buffer, to monitor and output a buffer accumulation amount, and to output data of the packets from the buffer in response to the recovery clock signal; a maximum extracting section configured to receive the buffer accumulation amount from the buffer and to extract a maximum value for each time period from the buffer accumulation amount; a control section configured to generate a control voltage such that the maximum values from the maximum extracting section are held at a reference value; and a VCO (Voltage Controlled Oscillator) configured to adjust a frequency of the recovery clock signal based on the control voltage from the control section.

摘要翻译： 时钟同步系统包括主节点; PSN（分组交换网络）; 以及从节点，被配置为通过使用通过PSN从主节点周期性地接收到的分组，使从节点中的恢复时钟信号与主节点中的时钟信号同步。 从节点包括：具有缓冲器并被配置为临时存储从主节点接收的分组在缓冲器中的缓冲器部分，以监视和输出缓冲器累积量，并响应于该缓冲器的数据从缓冲器输出数据 恢复时钟信号; 最大提取部分，被配置为从缓冲器接收缓冲器累积量，并从缓冲器累积量中提取每个时间段的最大值; 控制部，被配置为生成控制电压，使得来自最大提取部的最大值保持在基准值; 以及VCO（压控振荡器），其被配置为基于来自控制部的控制电压来调整恢复时钟信号的频率。

公开(公告)号：US20080219168A1

公开(公告)日：2008-09-11

申请号：US12042388

申请日：2008-03-05

申请人： Nobuyuki ENOMOTO ,  Kazuo TAKAGI

发明人： Nobuyuki ENOMOTO ,  Kazuo TAKAGI

IPC分类号： H04J3/16

CPC分类号： H04L45/04 ,  H04L45/02 ,  H04L45/124 ,  H04L45/125 ,  H04L45/48 ,  H04L45/66

摘要： An object of the present invention is to reflect a band of the bottleneck into the cost, to select an optimal path, and to enhance an efficiency of the net utilization without making a setting or a modification to the apparatus (bridge etc.) in which the path control protocol operates in a case where a difference exists between an actually utilizable rate (a band of the bottleneck) in the path between the bridges etc. and a link rate of the connection link such as the bridge etc. in a net in which the apparatus (bridge etc.), in which the path control protocol (STP etc.) for automatically computing a cost of a link by a physical band of the connection link operates, exists. In the system of the present invention, the port manager within the relay apparatus, upon receipt of a notification of the link rate from the port, investigates which side, out of the WAN side and the LAN side, becomes a bottleneck, and the cost rewriter within the relay apparatus rewrites the root path cost field within the BPDU in conformity to the rate of the bottleneck.

摘要翻译： 本发明的目的是将瓶颈的成本反映到成本中，选择最佳路径，并提高净利用的效率，而不必对设备（桥等）进行设置或修改，其中 路径控制协议在网桥之间的路径中的可实际利用率（瓶颈的带宽）与网络中的桥等连接链路的链路速率之间存在差异的情况下工作 其中存在用于通过连接链路的物理频带自动计算链路成本的路径控制协议（STP等）的装置（桥等）运行。 在本发明的系统中，中继装置内的端口管理器在接收到来自端口的链路速率的通知后，调查出WAN侧和LAN侧哪一侧成为瓶颈，成本 中继设备内的重写器根据瓶颈的速率重写BPDU内的根路径开销字段。

公开(公告)号：US07324440B2

公开(公告)日：2008-01-29

申请号：US10359133

申请日：2003-02-06

申请人： Kazuo Takagi ,  Masaki Umayabashi

发明人： Kazuo Takagi ,  Masaki Umayabashi

IPC分类号： H04J1/16 ,  H04J3/14

CPC分类号： H04J3/085 ,  H04L12/437 ,  H04L12/462

摘要： The invention enables protection of a ring frame transferred via an inter-ring bridge ring node when a fault occurs at the node in a multiring. Ring nodes form a ring protection domain to enable one ring node to be bypassed by using other ring nodes when a fault occurs at this ring node. The TTL value of ring frame to be transferred through the bypass is set to a value obtained by adding the number of hops h to the faulty ring node to a common initial value A in the same two-fiber ring to enable detection of a characteristic TTL value at a bypassing ring node. The bypass fur the ring frame is selected with reference to the characteristic TTL value at the bypassing ring node.

摘要翻译： 本发明能够保护在多个节点中发生故障时通过环形桥环节点传送的环形帧。 环形节点形成环形保护域，以便在该环节点发生故障时，通过使用其他环节点来使一个环节点被旁路。 将通过旁路传输的环形帧的TTL值设置为通过将故障环节点的跳数h与同一双光纤环中的公共初始值A相加而获得的值，以使能检测到特征TTL 旁路环节点的值。 参考旁路环节点处的特征TTL值选择环路的旁路。