公开(公告)号：US07468991B2

公开(公告)日：2008-12-23

申请号：US10388438

申请日：2003-03-17

申请人： Frank Bradbury ,  John Patrick Jones ,  Douglas MacIntyre ,  Raymond Schmidt ,  Scott Whitney

发明人： Frank Bradbury ,  John Patrick Jones ,  Douglas MacIntyre ,  Raymond Schmidt ,  Scott Whitney

IPC分类号： H04J3/06

CPC分类号： H04J3/0688

摘要： Synchronous timing techniques provide redundant reference frequencies to enable a packet switching system to continuously generate one or more master clock frequencies when an original reference frequency is lost or unavailable.

摘要翻译： 同步定时技术提供冗余的参考频率，以便当原始参考频率丢失或不可用时，分组交换系统能够连续地产生一个或多个主时钟频率。

公开(公告)号：US6078595A

公开(公告)日：2000-06-20

申请号：US920250

申请日：1997-08-28

申请人： John Patrick Jones ,  Raymond Schmidt ,  Eric L. Reed ,  Patrick L. DeAngelis ,  Mahesh N. Ganmukhi ,  Thomas A. Hoch ,  Brian Branscomb

发明人： John Patrick Jones ,  Raymond Schmidt ,  Eric L. Reed ,  Patrick L. DeAngelis ,  Mahesh N. Ganmukhi ,  Thomas A. Hoch ,  Brian Branscomb

IPC分类号： H04J3/06 ,  H04Q11/04

CPC分类号： H04Q11/0421 ,  H04J3/0688

摘要： A data communications switch and method of operation are presently disclosed enabling flexible, selectable provision of a common timing signal for synchronized external communication through physical layer interfaces with other network devices, synchronized internal communications within the switch, and for uninterrupted synchronization of such communications. Synchronization of external communications is enabled by programmable selection from among plural potential timing references at redundant timing modules (TMs). An active TM provides a primary external synchronization clock; a standby TM provides a redundant timing function. Both TMs access the same references. A state signal indicates which synchronization clock is active. External interfaces derive timing from this distributed clock. Synchronized internal timing is provided by an internal clock and phase-locked loop (PLL) on each TM. The clock/PLL timing signal output is routed to other switch elements, enabling synchronized internal data transfer. Both interconnected TMs actively generate clock signals for external and internal use, enabling seamless timing switchover should conditions warrant a change in TMs.

摘要翻译： 目前公开了一种数据通信开关和操作方法，使得能够灵活地，可选择地提供用于通过与其他网络设备的物理层接口同步的外部通信，交换机内的同步内部通信以及这种通信的不间断同步的公共定时信号。 通过在冗余定时模块（TM）的多个潜在定时参考中的可编程选择来实现外部通信的同步。 主动TM提供主要的外部同步时钟; 备用TM提供冗余定时功能。 两个TM都访问相同的引用。 状态信号指示哪个同步时钟是活动的。 外部接口从该分布式时钟导出时序。 同步的内部时序由每个TM上的内部时钟和锁相环（PLL）提供。 时钟/ PLL定时信号输出被路由到其他开关元件，实现同步的内部数据传输。 两个互连的TM主动地产生用于外部和内部使用的时钟信号，如果条件需要TM变化，则实现无缝时序切换。

公开(公告)号：US07058010B2

公开(公告)日：2006-06-06

申请号：US09820521

申请日：2001-03-29

申请人： P K Chidambaran ,  Thomas A Hoch ,  John Patrick Jones ,  Andrew A Long ,  Prasasth R Palnati ,  Raymond J Schmidt

发明人： P K Chidambaran ,  Thomas A Hoch ,  John Patrick Jones ,  Andrew A Long ,  Prasasth R Palnati ,  Raymond J Schmidt

IPC分类号： H04L12/26

CPC分类号： H04L45/22 ,  H04L45/16

摘要： The present invention is a methodology for controlled switchover of unicast and multicast data flows in packet based switching system. In some cases it is advantageous to purposefully support switchover of flows from one path to the other without causing loss of data. This is termed a “controlled” or “hitless” switchover. In accordance with the present invention switchover methodology, given that an ingress arbiter device is transmitting to both cores simultaneously, it is required that the flows to both switching cores be synchronized at an aggregator level and that an egress arbiter be given time to cease receiving packets from one Core then switch over to the other Core, and continue receiving packets.

摘要翻译： 本发明是一种在基于分组的交换系统中单播和组播数据流的受控切换的方法。 在某些情况下，有意义地支持流从一个路径切换到另一个路径，而不会导致数据丢失。 这被称为“受控制”或“无控制”切换。 根据本发明的切换方法，考虑到进入仲裁器同时发送到两个核心，要求在两个交换核心上的流量在聚合器级别同步，并且外部仲裁器被给予时间以停止接收分组 从一个Core然后切换到另一个Core，并继续接收数据包。

公开(公告)号：US06894969B1

公开(公告)日：2005-05-17

申请号：US09711997

申请日：2000-11-14

申请人： P K Chidambaran ,  Thomas A Hoch ,  John Patrick Jones ,  Andrew A Long ,  Prasasth R Palnati ,  Ronald M Parker ,  Raymond J Schmidt

发明人： P K Chidambaran ,  Thomas A Hoch ,  John Patrick Jones ,  Andrew A Long ,  Prasasth R Palnati ,  Ronald M Parker ,  Raymond J Schmidt

IPC分类号： H04L12/56 ,  H04J1/16 ,  H04J3/14

CPC分类号： H04L12/5601 ,  H04L49/1523 ,  H04L49/153 ,  H04L2012/5627 ,  H04L2012/5642 ,  H04L2012/5651

摘要： The present invention is a core interface mechanism that permits 1:N type port protection on the core side of the switch such that core bandwidth is not wasted by the direct connection of service cards to the switching core. In an exemplary embodiment, a core interface module supports up to two active service cards and one dedicated protection service card. To provide increased efficiency and lower cost the redundant service card does not strand user bandwidth in the switch core. In an exemplary embodiment, the core interface includes a plurality of core side input and output ports for coupling to the switching core and a plurality of card side input and output ports for coupling to the service cards. A data flow switch function couples between the core side ports and the card side ports. The data flow switch function operates to complete data flow paths between the core side ports and the card side ports. A link failure detector detects a communications failure on a communications link associated with one of the active service cards and alters the data flow switch function such that one or more of said data flow paths associated with one of the active service cards are switched to one of said protection cards. The bandwidth allotment between the service cards and the interface device is generally greater than available bandwidth between the switching core and the interface device, thereby enabling connection of the protection cards without corresponding usage of switching core bandwidth.

摘要翻译： 本发明是一种核心接口机制，其允许在交换机的核心侧进行1：N型端口保护，使得核心带宽不会因为服务卡直接连接到交换核心而浪费。 在示例性实施例中，核心接口模块最多支持两个活动服务卡和一个专用保护服务卡。 为了提供更高的效率和更低的成本，冗余服务卡不会在交换机核心中分组用户带宽。 在示例性实施例中，核心接口包括用于耦合到交换核心的多个核心侧输入和输出端口以及用于耦合到服务卡的多个卡侧输入和输出端口。 数据流切换功能在核心侧端口和卡侧端口之间耦合。 数据流切换功能用于完成核心侧端口和卡侧端口之间的数据流路径。 链路故障检测器检测与一个活动服务卡相关联的通信链路上的通信故障，并改变数据流切换功能，使得与一个活动服务卡相关联的所述数据流路径中的一个或多个切换到 说保护卡。 服务卡和接口设备之间的带宽分配通常大于交换核心和接口设备之间的可用带宽，从而能够连接保护卡而无需相应地使用交换核心带宽。

公开(公告)号：US08054853B2

公开(公告)日：2011-11-08

申请号：US11796770

申请日：2007-04-30

申请人： John Patrick Jones ,  Timothy L. Norman ,  Alan Chin-Luen Chan

发明人： John Patrick Jones ,  Timothy L. Norman ,  Alan Chin-Luen Chan

IPC分类号： H04L12/43

CPC分类号： H04J3/1664 ,  H04J2203/0012 ,  H04Q2213/13293 ,  H04Q2213/13296 ,  H04Q2213/13392

摘要： The present invention provides systems and methods for supporting native TDM and native Packet switching simultaneously in a meshed switching architecture. Specifically with the present invention, the meshed links are common to both TDM and packet traffic, and both types terminate to a common system interface without the need to separate physical resources and infrastructure; the common termination function has access to both the TDM (Time Slot Interchange (TSI)) switching and packet switching elements. Native TDM switching and packet switching operate in concurrently in the mesh over common links, with the personality of the links derived by the card type (attached to the mesh). In this, a given card or slot in a system can communicate in the native format to both packet based cards (slots) or TDM based cards (slots) simultaneously with no preconceived restrictions or limitations on slot or link definition.

摘要翻译： 本发明提供了用于在网状交换架构中同时支持本机TDM和本地分组交换的系统和方法。 具体地说，利用本发明，网状链路对于TDM和分组业务是共同的，并且两种类型都终止于公共系统接口，而不需要分离物理资源和基础设施; 公共终端功能可以访问TDM（时隙交换（TSI））交换和分组交换元件。 本机TDM交换和分组交换在通过公共链路的网格中同时操作，由卡类型（附加到网格）导出的链接的个性。 在这种情况下，系统中的给定卡或插槽可以以本机格式与基于分组的卡（插槽）或基于TDM的卡（插槽）同时进行通信，而不会对插槽或链路定义造成先入为然的限制或限制。

公开(公告)号：US07428208B2

公开(公告)日：2008-09-23

申请号：US10277023

申请日：2002-10-21

申请人： John Patrick Jones ,  Michael Paul Demilia ,  Ronald Mark Parker ,  Mehmet Hakan Duymazlar

发明人： John Patrick Jones ,  Michael Paul Demilia ,  Ronald Mark Parker ,  Mehmet Hakan Duymazlar

IPC分类号： G01R31/08

CPC分类号： H04Q11/0421 ,  H04L12/2856 ,  H04L12/2872 ,  H04Q2213/13003 ,  H04Q2213/1302 ,  H04Q2213/13039 ,  H04Q2213/1304 ,  H04Q2213/13164 ,  H04Q2213/13166 ,  H04Q2213/13167 ,  H04Q2213/13199 ,  H04Q2213/13213 ,  H04Q2213/13216 ,  H04Q2213/13295 ,  H04Q2213/13298 ,  H04Q2213/13299 ,  H04Q2213/1332 ,  H04Q2213/13322 ,  H04Q2213/1334 ,  H04Q2213/13395

摘要： Multi-service telecommunication switches which include enhanced component redundancy and which also allow multiple chassis connections to a switching fabric enhance the likelihood that packets transmitted to and from the switch will not be lost due do a particular component failure and also enable chassis stacking in a rack system. Such a multi-service telecommunication switch includes redundant physical layer adapter cards, redundant service cards, redundant timing modules, and redundant switching fabrics. Further, the multi-service telecommunication switch, includes an enhanced data flow distribution (load-balancing) architecture which enables multiple chassis connections to the switching fabrics.

摘要翻译： 多业务电信交换机包括增强的组件冗余，并且还允许多个机箱与交换结构的连接增强了发送到和从交换机的数据包不会因特定组件故障而丢失的可能性，并且还使得机架在机架中堆叠 系统。 这样的多业务电信交换机包括冗余物理层适配卡，冗余业务卡，冗余定时模块和冗余交换结构。 此外，多业务电信交换机包括增强的数据流分布（负载均衡）架构，其使能多个机箱连接到交换结构。

公开(公告)号：US20080181203A1

公开(公告)日：2008-07-31

申请号：US11796770

申请日：2007-04-30

申请人： John Patrick Jones ,  Timothy L. Norman ,  Alan Chin-Luen Chan

发明人： John Patrick Jones ,  Timothy L. Norman ,  Alan Chin-Luen Chan

IPC分类号： H04L12/66

CPC分类号： H04J3/1664 ,  H04J2203/0012 ,  H04Q2213/13293 ,  H04Q2213/13296 ,  H04Q2213/13392

摘要： The present invention provides systems and methods for supporting native TDM and native Packet switching simultaneously in a meshed switching architecture. Specifically with the present invention, the meshed links are common to both TDM and packet traffic, and both types terminate to a common system interface without the need to separate physical resources and infrastructure; the common termination function has access to both the TDM (Time Slot Interchange (TSI)) switching and packet switching elements. Native TDM switching and packet switching operate in concurrently in the mesh over common links, with the personality of the links derived by the card type (attached to the mesh). In this, a given card or slot in a system can communicate in the native format to both packet based cards (slots) or TDM based cards (slots) simultaneously with no preconceived restrictions or limitations on slot or link definition.

摘要翻译： 本发明提供了用于在网状交换架构中同时支持本机TDM和本地分组交换的系统和方法。 具体地说，利用本发明，网状链路对于TDM和分组业务是共同的，并且两种类型都终止于公共系统接口，而不需要分离物理资源和基础设施; 公共终端功能可以访问TDM（时隙交换（TSI））交换和分组交换元件。 本机TDM交换和分组交换在通过公共链路的网格中同时操作，由卡类型（附加到网格）导出的链接的个性。 在这种情况下，系统中的给定卡或插槽可以以本机格式与基于分组的卡（插槽）或基于TDM的卡（插槽）同时进行通信，而不会对插槽或链路定义造成先入为然的限制或限制。

公开(公告)号：US07180867B2

公开(公告)日：2007-02-20

申请号：US09748419

申请日：2000-12-26

申请人： Thomas A Hoch ,  John Patrick Jones ,  Andrew A Long ,  Prasasth R Palnati ,  Ronald M Parker ,  Raymond J Schmidt

发明人： Thomas A Hoch ,  John Patrick Jones ,  Andrew A Long ,  Prasasth R Palnati ,  Ronald M Parker ,  Raymond J Schmidt

IPC分类号： H04J3/16 ,  H04L12/26 ,  H04L12/28

CPC分类号： H04L47/2441 ,  H04L47/10 ,  H04L47/125 ,  H04L49/1523 ,  H04L49/552 ,  H04L2012/5627

摘要： A methodology is provided for fault detection and service restoration in a multiservice switch on a per flow basis. An ingress source transmits the same data over each of two redundant cores. An egress receiver selects on a per flow bass which core to utilize. Bi-directional flows are not necessarily grouped together. The basic approach to fault detection is to assume that the two cores are not in lock step, but that the shelves are continually monitoring link flows for control path data as well as user data. The path monitoring is accomplished using a combination of arbiter and aggregator functions found in the service shelves and core interface cards, respectively. The arbiter transmits link test cells to both cores on a per flow basis, wherein the link test cells traverse and are monitored by respective aggregators to and from each core. When an egress arbiter determines that a flow is bad, it initiates a switch to the alternative source core, from which the flow would continue.

摘要翻译： 提供了一种基于每个流的多业务交换机中的故障检测和服务恢复的方法。 入口源通过两个冗余内核中的每一个发送相同的数据。 一个出口接收器选择一个每个流鲈鱼的核心来利用。 双向流不一定分组在一起。 故障检测的基本方法是假设两个核心不是锁定步骤，​​而是架子不断监视控制路径数据和用户数据的链路流。 路径监控通过分别在服务架和核心接口卡中发现的仲裁器和聚合器功能的组合来实现。 仲裁器以每个流的形式将链路测试小区传输到两个核心，其中链路测试小区遍历并由相应的聚合器对每个核心进行监视。 当出口仲裁器确定流量不良时，它启动切换到替代源核心，流程将继续运行。