公开(公告)号：US08005081B2

公开(公告)日：2011-08-23

申请号：US11962476

申请日：2007-12-21

申请人： Nigel Bragg ,  David Allan ,  Simon Parry ,  Robert Friskney ,  Simon Brueckheimer

发明人： Nigel Bragg ,  David Allan ,  Simon Parry ,  Robert Friskney ,  Simon Brueckheimer

IPC分类号： H04L12/28

CPC分类号： H04L12/4641 ,  H04L12/462 ,  H04L12/4654 ,  H04L12/4658 ,  H04L12/4662 ,  H04L41/12 ,  H04L43/50 ,  H04L45/745

摘要： An Ethernet network comprises nodes which support a plurality of different forwarding modes. A range of VLAN Identifiers (VIDs) are allocated to each of the forwarding modes. Connections are configured between a source node and a destination node of the network using different forwarding modes. Packets carrying data traffic are sent to the destination node by selectively setting a VID in a packet to a first value, to transfer a packet via a first connection and a first forwarding mode, and a second value to transfer a packet via the second connection and the second forwarding mode. Packets received from both of the connections and sent on to an end-user. VLAN Identifiers can be allocated to different releases of functionality at nodes (e.g. software releases) such that packets are forwarded via a set of nodes supporting a first release, or via a set of nodes supporting a second release. It is possible to provide a controlled and disruption-free network evolution.

摘要翻译： 以太网网络包括支持多个不同转发模式的节点。 每个转发模式都分配了一系列VLAN标识符（VID）。 使用不同的转发模式在网络的源节点和目的节点之间配置连接。 通过选择性地将分组中的VID设置为第一值，通过第一连接和第一转发模式传送分组，以及通过第二连接传送分组的第二值，将携带数据业务的分组发送到目的地节点， 第二转发模式。 从两个连接接收到的数据包发送给最终用户。 VLAN标识符可以被分配给节点（例如，软件版本）上的不同版本的功能，使得分组经由支持第一版本的一组节点或经由支持第二版本的一组节点转发。 可以提供受控和无中断的网络演进。

公开(公告)号：US20090168663A1

公开(公告)日：2009-07-02

申请号：US11964534

申请日：2007-12-26

申请人： Robert Friskney ,  Chris Ramsden

发明人： Robert Friskney ,  Chris Ramsden

IPC分类号： H04L12/28 ,  H04L12/24

CPC分类号： H04L41/0889 ,  H04L41/0806 ,  H04L41/0846 ,  H04L41/0886 ,  Y02D30/32

摘要： OAM data is automatically configured by each node of an Ethernet network. The OAM data is required to support an OAM signalling session associated with a connection for carrying data traffic between nodes. The OAM data can be derived from data already associated with all endpoints of the connection. The node can derive the OAM data autonomously. A node which is an endpoint of an OAM signalling session automatically derives an identifier for the first endpoint. The first identifier can be autonomously derived by the node and other signalling content, such as source MAC address, is used to differentiate OAM signalling messages. Alternatively, a node can automatically configure the first identifier on the basis of information stored locally at the node and signalling with a second endpoint. The OAM data can be IEEE 802.1ag or ITU Y.1731 data.

摘要翻译： OAM数据由以太网网络的每个节点自动配置。 需要OAM数据来支持与用于承载节点之间的数据业务的连接相关联的OAM信令会话。 可以从已经与连接的所有端点相关联的数据导出OAM数据。 节点可以自主导出OAM数据。 作为OAM信令会话的端点的节点自动导出第一端点的标识符。 第一标识符可以由节点自主导出，并且诸如源MAC地址的其他信令内容用于区分OAM信令消息。 或者，节点可以基于在节点本地存储的信息和用第二端点进行信令来自动配置第一标识符。 OAM数据可以是IEEE 802.1ag或ITU Y.1731数据。

公开(公告)号：US20100189015A1

公开(公告)日：2010-07-29

申请号：US12752228

申请日：2010-04-01

申请人： Nigel BRAGG ,  Paul Bottorff ,  David Allan ,  Robert Friskney ,  Simon Parry

发明人： Nigel BRAGG ,  Paul Bottorff ,  David Allan ,  Robert Friskney ,  Simon Parry

IPC分类号： H04L12/28

CPC分类号： H04L45/48 ,  H04L45/04

摘要： A method is provided of planning routes and allocating route identifiers in a managed frame-forwarding network. The network comprises a plurality of nodes interconnected by links, with each node being arranged to forward data frames according to a combination of an identifier and a network address carried by a received data frame and forwarding instructions stored at the node. A first step of the method identifies a sub-set of nodes which are core nodes of the network. The remaining nodes are termed outlying nodes. A spanning tree is then built off each of the identified core nodes, with the spanning tree stopping one link short of any other core node. Each spanning tree defines a loop-free path between a core node at the root of the spanning tree and a set of outlying nodes. Connections are planned between roots of the spanning trees and a different identifier is allocated to each planned connection between a pair of spanning trees.

摘要翻译： 提供了一种在被管理的帧转发网络中规划路由和分配路由标识符的方法。 该网络包括通过链路互连的多个节点，每个节点被安排为根据由接收的数据帧承载的标识符和网络地址的组合以及存储在该节点处的转发指令来转发数据帧。 该方法的第一步确定作为网络核心节点的节点子集。 其余节点称为外围节点。 然后，每个标识的核心节点都生成一个生成树，生成树停止一个链路，而不是任何其他核心节点。 每个生成树定义生成树根节点和一组外围节点之间的无环路径。 在生成树的根之间计划连接，并且将不同的标识符分配给一对生成树之间的每个计划的连接。

公开(公告)号：US20080310417A1

公开(公告)日：2008-12-18

申请号：US12196909

申请日：2008-08-22

申请人： Robert Friskney ,  Nigel Bragg ,  Simon Parry ,  Peter Ashwood Smith ,  David Allan ,  Simon Brueckheimer

发明人： Robert Friskney ,  Nigel Bragg ,  Simon Parry ,  Peter Ashwood Smith ,  David Allan ,  Simon Brueckheimer

IPC分类号： H04L12/56

CPC分类号： H04L41/0823 ,  H04L12/4645 ,  H04L45/00 ,  H04L45/16 ,  H04L45/54 ,  H04L45/64 ,  H04L45/66 ,  H04L45/72 ,  H04L49/205 ,  H04L49/253 ,  H04L49/254 ,  H04L49/351 ,  H04L49/354

摘要： The invention relates to enabling differential forwarding in address-based carrier networks such as Ethernet networks. There is described a method of and connection controller for establishing connections (76, 77) in a frame-based communications network comprising nodes (71-75 and 78) such as Ethernet switches. The connections are established by configuring, in various of the nodes, mappings for forwarding data frames, such as Ethernet frames. The mappings are from a combination of a) a destination (or source) address corresponding to a destination (or source) node (73) of the connection and b) an identifier, such as a VLAN tag. The mappings are to selected output ports of the various nodes. By using the combination of destination (or source) address AND identifier, the mappings enable data frames belonging to different connections (76, 77) to be forwarded differentially (ie forwarded on different output ports) at a node (75) despite the different connections having the same destination node. This enables flexibility in routing connections and the ability to perform traffic engineering.

摘要翻译： 本发明涉及在诸如以太网的基于地址的运营商网络中启用差分转发。 描述了在包括诸如以太网交换机的节点（71-75和78）的基于帧的通信网络中建立连接（76,77）的方法和连接控制器。 通过在各种节点中配置用于转发数据帧（例如以太网帧）的映射来建立连接。 映射来自a）与该连接的目的地（或源）节点（73）对应的目的地（或源）地址的组合，以及b）诸如VLAN标签的标识符。 映射到各个节点的选定输出端口。 通过使用目的地（或源）地址AND标识符的组合，映射使得属于不同连接（76,77）的数据帧能够在节点（75）处差分地转发（即，在不同的输出端口上转发），尽管不同的连接 具有相同的目的地节点。 这使得路由连接的灵活性和执行流量工程的能力。

公开(公告)号：US07400583B2

公开(公告)日：2008-07-15

申请号：US10261069

申请日：2002-09-30

申请人： Robert Friskney ,  Simon Parry ,  Adrian Sparks ,  Nigel Davis

发明人： Robert Friskney ,  Simon Parry ,  Adrian Sparks ,  Nigel Davis

IPC分类号： H04L12/26

CPC分类号： H04L43/00 ,  H04L41/0654 ,  H04L41/145 ,  H04L41/5003 ,  H04L41/5009 ,  H04L43/0882

摘要： A system for monitoring a communications network generates a total value figure, using a store of value information. The system can identify which of the monitored flows of traffic rely on a given one or more of the components of the network, and generate a total value of all the identified flows. This type of value information can be easier for network operators to interpret because the information is more direct, and more explicit. Also, many specific rules/warnings about reconfigurations need not be provided. Values can be sent to remote field workers, or used for network configuration, network planning, and financial reporting.

摘要翻译： 用于监视通信网络的系统使用价值信息的存储来生成总价值图。 系统可以识别哪个受监视的流量流依赖于给定的一个或多个网络的组件，并且生成所有所识别的流的总值。 这种类型的价值信息可以让网络运营商更容易理解，因为信息更直接，更明确。 此外，不需要提供关于重新配置的许多具体规则/警告。 值可以发送给远程现场工作人员，也可以用于网络配置，网络规划和财务报告。

公开(公告)号：US07362777B2

公开(公告)日：2008-04-22

申请号：US10185135

申请日：2002-06-27

申请人： Douglas Fisher ,  Nigel Bragg ,  Robert Friskney ,  Nigel Baker

发明人： Douglas Fisher ,  Nigel Bragg ,  Robert Friskney ,  Nigel Baker

IPC分类号： H04J3/24

CPC分类号： H04J3/1617 ,  H04J2203/0094 ,  H04Q11/0478

摘要： A multiplexed frame based client signal comprising a payload and a client overhead is transported between first and second client networks over a plurality of signal paths by inverse multiplexing the client signal into a plurality of lower rate signals each containing a respective payload and client overhead; attaching a carrier overhead to each said lower rate signal; transmitting the lower rate signals over the plurality of paths from the first client network to the second client network; and, at the second network, discarding the carrier overhead from each lower rate signal, and reassembling the lower rate signals so as to recover the client signal. The method enables bandwidth trading utilising virtual concatenation of synchronous optical channels, such that transparent transmission of a customers signals over any variety of intermediate networks can be achieved without requiring that the intermediate networks support virtual concatenation.

摘要翻译： 包括有效载荷和客户机开销的复用的基于帧的客户端信号通过多个信号路径在第一和第二客户端网络之间通过将客户端信号反向多路复用为多个低速率信号而传送，每个低速率信号包含各自的有效载荷和客户端开销; 将载波开销附加到每个所述较低速率信号; 通过所述多个路径从所述第一客户端网络向所述第二客户端网络发送所述较低速率信号; 并且在第二网络处，从每个较低速率信号中丢弃载波开销，并重新组合较低速率信号以便恢复客户端信号。 该方法使得能够利用同步光信道的虚级联进行带宽交易，从而可以实现客户信号在各种中间网络上的透明传输，而不需要中间网络支持虚级联。

公开(公告)号：US20070177527A1

公开(公告)日：2007-08-02

申请号：US11343996

申请日：2006-01-31

申请人： Nigel Bragg ,  Paul Bottorff ,  David Allan ,  Robert Friskney ,  Simon Parry

发明人： Nigel Bragg ,  Paul Bottorff ,  David Allan ,  Robert Friskney ,  Simon Parry

IPC分类号： H04L12/28

CPC分类号： H04L45/48 ,  H04L45/04

摘要： A method is provided of planning routes and allocating route identifiers in a managed frame-forwarding network. The network comprises a plurality of nodes interconnected by links, with each node being arranged to forward data frames according to a combination of an identifier and a network address carried by a received data frame and forwarding instructions stored at the node. A first step of the method identifies a sub-set of nodes which are core nodes of the network. The remaining nodes are termed outlying nodes. A spanning tree is then built off each of the identified core nodes, with the spanning tree stopping one link short of any other core node. Each spanning tree defines a loop-free path between a core node at the root of the spanning tree and a set of outlying nodes. Connections are planned between roots of the spanning trees and a different identifier is allocated to each planned connection between a pair of spanning trees.

摘要翻译： 提供了一种在被管理的帧转发网络中规划路由和分配路由标识符的方法。 该网络包括通过链路互连的多个节点，每个节点被安排为根据由接收的数据帧承载的标识符和网络地址的组合以及存储在该节点处的转发指令来转发数据帧。 该方法的第一步确定作为网络核心节点的节点子集。 其余节点称为外围节点。 然后，每个标识的核心节点都生成一个生成树，生成树停止一个链路，而不是任何其他核心节点。 每个生成树定义生成树根节点和一组外围节点之间的无环路径。 在生成树的根之间计划连接，并且将不同的标识符分配给一对生成树之间的每个计划的连接。

公开(公告)号：US09100120B1

公开(公告)日：2015-08-04

申请号：US10675760

申请日：2003-09-30

申请人： Robert Friskney ,  Fiona Davis ,  Nigel Baker ,  Christopher Phillips ,  Song Dong

发明人： Robert Friskney ,  Fiona Davis ,  Nigel Baker ,  Christopher Phillips ,  Song Dong

IPC分类号： H04B10/25

CPC分类号： H04Q11/0066 ,  H04B10/25 ,  H04J14/0257 ,  H04J14/0271 ,  H04J14/0295 ,  H04L45/121 ,  H04L45/124 ,  H04L45/127 ,  H04L45/30 ,  H04L45/308 ,  H04L45/70 ,  H04Q2011/0073 ,  H04Q2011/0086

摘要： Typically paths are provisioned in a network with a margin which allows for component variations and failures in the network and so on. By providing more information about the requirements of the link in a path request, it is possible to more efficiently calculate a route for the path through the network. The efficiency gain allows greater network utilization which in turn saves costs for the network service provider.

摘要翻译： 通常，路径在网络中配置有一个边距，允许网络中的组件变化和故障等等。 通过提供关于路径请求中的链路的需求的更多信息，可以更有效地计算通过网络的路径的路由。 效率增益允许更大的网络利用率，从而节省网络服务提供商的成本。

公开(公告)号：US08923292B2

公开(公告)日：2014-12-30

申请号：US10593108

申请日：2005-04-06

申请人： Robert Friskney ,  Nigel Bragg ,  Simon Parry ,  Peter Ashwood Smith ,  David Allan ,  Simon Brueckheimer

发明人： Robert Friskney ,  Nigel Bragg ,  Simon Parry ,  Peter Ashwood Smith ,  David Allan ,  Simon Brueckheimer

IPC分类号： H04L12/28 ,  H04J3/24

CPC分类号： H04L41/0823 ,  H04L12/4645 ,  H04L45/00 ,  H04L45/16 ,  H04L45/54 ,  H04L45/64 ,  H04L45/66 ,  H04L45/72 ,  H04L49/205 ,  H04L49/253 ,  H04L49/254 ,  H04L49/351 ,  H04L49/354

摘要： The invention relates to enabling differential forwarding in address-based carrier networks such as Ethernet networks. There is described a method of and connection controller for establishing connections (76, 77) in a frame-based communications network comprising nodes (71-75 and 78) such as Ethernet switches. The connections are established by configuring, in various of the nodes, mappings for forwarding data frames, such as Ethernet frames. The mappings are from a combination of a) a destination (or source) address corresponding to a destination (or source) node (73) of the connection and b) an identifier, such as a VLAN tag. The mappings are to selected output ports of the various nodes. By using the combination of destination (or source) address AND identifier, the mappings enable data frames belonging to different connections (76, 77) to be forwarded differentially (ie forwarded on different output ports) at a node (75) despite the different connections having the same destination node. This enables flexibility in routing connections and the ability to perform traffic engineering.

摘要翻译： 本发明涉及在诸如以太网的基于地址的运营商网络中启用差分转发。 描述了在包括诸如以太网交换机的节点（71-75和78）的基于帧的通信网络中建立连接（76,77）的方法和连接控制器。 通过在各种节点中配置用于转发数据帧（例如以太网帧）的映射来建立连接。 映射来自a）与该连接的目的地（或源）节点（73）对应的目的地（或源）地址的组合，以及b）诸如VLAN标签的标识符。 映射到各个节点的选定输出端口。 通过使用目的地（或源）地址AND标识符的组合，映射使得属于不同连接（76,77）的数据帧能够在节点（75）处差分地转发（即，在不同的输出端口上转发），尽管不同的连接 具有相同的目的地节点。 这使得路由连接的灵活性和执行流量工程的能力。

公开(公告)号：US07471903B1

公开(公告)日：2008-12-30

申请号：US10180595

申请日：2002-06-26

申请人： Robert Friskney ,  Adrian Sparks ,  Robert Spagnoletti ,  Robin Rickard

发明人： Robert Friskney ,  Adrian Sparks ,  Robert Spagnoletti ,  Robin Rickard

IPC分类号： H04B10/04

CPC分类号： H04B10/5161 ,  H04B10/541 ,  H04B10/5561 ,  H04B10/61 ,  H04B10/6161 ,  H04B10/6163 ,  H04B10/63

摘要： An optical communications system has a transmitter which uses modulation using multiple level phase and/or amplitude modulation, and is adaptable to provide modulation for different signals using different selections of the multiple levels. A receiver is able to perform demodulation from the multiple level phase and/or amplitude modulation, and is adaptable to provide demodulation of signals modulated using the different selections of the multiple levels. This provides an adaptive modulation system, so that different bit rates can be employed for different links.

摘要翻译： 光通信系统具有使用多电平相位和/或幅度调制的调制的发射机，并且可适应于使用多个等级的不同选择为不同信号提供调制。 接收机能够从多电平相位和/或幅度调制执行解调，并且适于提供使用多个电平的不同选择调制的信号的解调。 这提供了自适应调制系统，使得不同的比特率可以用于不同的链路。