公开(公告)号：US08169915B1

公开(公告)日：2012-05-01

申请号：US12239118

申请日：2008-09-26

申请人： Venkata Rangavajjhala ,  Marc A. Schaub

发明人： Venkata Rangavajjhala ,  Marc A. Schaub

IPC分类号： H04J1/16

CPC分类号： H04L45/125 ,  H04L45/7453

摘要： An apparatus and a method for load balancing across multiple routes using an indirection table and hash function during a process of packet classification are disclosed. A network device such as a router includes a memory, a hash component, and a result memory. The memory is referred to as an indirection random access memory (“RAM”), is capable of storing information regarding number of paths from source devices to destination devices. The memory, in one embodiment, provides a base index value and a range number indicating the number of paths associated with the base index value. The hash component generates a hash index in response to the base index value and the range number. Upon generation of hash index, the result memory identifies a classification result in response to the hash index.

摘要翻译： 公开了一种在分组过程中使用间接表和散列函数在多个路由之间进行负载平衡的装置和方法。 诸如路由器的网络设备包括存储器，散列组件和结果存储器。 存储器被称为间接随机存取存储器（“RAM”），能够存储关于从源设备到目的地设备的路径数量的信息。 在一个实施例中，存储器提供基本索引值和指示与基本索引值相关联的路径的数量的范围号。 哈希组件响应于基本索引值和范围数量生成哈希索引。 在生成散列索引时，结果存储器响应于散列索引识别分类结果。

公开(公告)号：US20120076013A1

公开(公告)日：2012-03-29

申请号：US12891325

申请日：2010-09-27

申请人： Weiying Cheng

发明人： Weiying Cheng

IPC分类号： H04L12/26

CPC分类号： H04L41/5038 ,  H04L12/4641 ,  H04L43/0829

摘要： Embodiments including methods, apparatuses, and computer program products for calculating frame parameters for the purpose of measuring performance in a network based on the calculated frame parameters are disclosed. By automatically or manually provisioning at least two network elements in a star or other network topology to transmit and receive service frames (e.g., Loss Measurement Messages or Loss Measurement Responses), the embodiments enable network elements to share network resources, such as frame counters, thereby decreasing the number of frame counters needed to perform frame parameter measurements and increasing scalability for a given counter resource supported by a low cost network processor units.

摘要翻译： 公开了包括用于基于所计算的帧参数来计算网络中的性能的目的来计算帧参数的方法，装置和计算机程序产品的实施例。 通过自动或手动地配置星形或其他网络拓扑中的至少两个网络元件以发送和接收服务帧（例如，损失测量消息或丢失测量响应），实施例使得网络元件能够共享网络资源，诸如帧计数器， 从而减少执行帧参数测量所需的帧计数器的数量，并增加由低成本网络处理器单元支持的给定计数器资源的可扩展性。

公开(公告)号：US20120063778A1

公开(公告)日：2012-03-15

申请号：US13300130

申请日：2011-11-18

申请人： Philip J. Lin ,  James D. Mills

发明人： Philip J. Lin ,  James D. Mills

IPC分类号： H04J14/02 ,  H04B10/20

CPC分类号： H04J14/0213 ,  H04J14/0212 ,  H04J14/0217

摘要： An optical add/drop multiplexer incorporates an integrated receiver module and an integrated transmitter which are interfaced to an intervening electrical network to provide an add/drop/pass-through functionality. The receiver module incorporates a wavelength demultiplexer which is in turn combined with optical/electrical converters PIN photodiodes, and amplifiers on a per wavelength basis to output a plurality of parallel electrical signals in response to a common optical input. The transmitter module combines an integrated plurality of drive circuits and lasers for converting a plurality of parallel input electrical signals to a plurality of optical signals, on a per wavelength basis, which in turn are coupled via an optical wavelength multiplexer to a common output optical fiber. The interconnected electrical network, ring mesh or tree, can provide a reconfigurable electrical add/drop interface to other portions of the network.

摘要翻译： 光分插复用器包括集成的接收器模块和集成的发射机，其连接到中间的电网络以提供加/减/传递功能。 接收器模块包括波长解复用器，其又与光/电转换器PIN光电二极管和基于每个波长的放大器组合，以响应于公共光输入输出多个并行电信号。 发射机模块将集成的多个驱动电路和激光器组合，用于将多个并行输入电信号转换为多个光信号，每个光信号基于每个波长，其又通过光学波长多路复用器耦合到公共输出光纤 。 互连的电网，环形网或树可以为网络的其他部分提供可重新配置的电气插拔接口。

公开(公告)号：US08125891B2

公开(公告)日：2012-02-28

申请号：US12787015

申请日：2010-05-25

申请人： T. Benjamin Mack-Crane ,  Jonathan B. Sadler ,  Susan W. Teller

发明人： T. Benjamin Mack-Crane ,  Jonathan B. Sadler ,  Susan W. Teller

IPC分类号： G01R31/08 ,  H04L12/66 ,  H04L12/28

CPC分类号： H04L45/62 ,  H04J3/14 ,  H04J3/1611 ,  H04J2203/0053 ,  H04L45/02 ,  H04L45/123 ,  H04L45/32 ,  H04L45/50 ,  H04L45/64

摘要： Each node of a telecommunications network determines a connection type attributes available for each signal type supported by the node. Each signal type represents a different connection routing layer within the telecommunications network. Adaptation costs involved in traversing from one connection routing layer to another connection routing layer in the node are calculated. The connection type attributes and adaptation costs are included in a link state advertisement broadcasted by each node in the telecommunications network. A route calculation is performed for a desired signal to determine a route through the telecommunications network for the signal. The route calculation takes into account the various connection type attributes, availability, and adaptation costs in determining the shortest route for the signal through the telecommunications network.

摘要翻译： 电信网络的每个节点确定可用于由节点支持的每种信号类型的连接类型属性。 每个信号类型表示电信网络内不同的连接路由层。 计算从一个连接路由层遍历到该节点中的另一个连接路由层所涉及的适配成本。 连接类型属性和自适应成本包括在电信网络中的每个节点广播的链路状态广告中。 对所需信号执行路线计算，以确定通过电信网络的信号路线。 路由计算在确定通过电信网络的信号的最短路由时考虑到各种连接类型属性，可用性和适应成本。

公开(公告)号：US20110293053A1

公开(公告)日：2011-12-01

申请号：US13042067

申请日：2011-03-07

申请人： Gopal Harikumar ,  Daniel J. Marchok ,  Kenneth J. Rudofski

发明人： Gopal Harikumar ,  Daniel J. Marchok ,  Kenneth J. Rudofski

IPC分类号： H04B1/10

CPC分类号： H04L25/03012 ,  H04L27/2607 ,  H04L2025/03414

摘要： A multiple carrier communication system includes a primary impulse shortening filter that receives an output signal of an analog to digital converter and accepts coefficients. A secondary impulse shortening filter receives the output signal of the analog to digital converter, outputs an output signal, and passes coefficients to the primary impulse shortening filter. A reference signal generator outputs a reference signal. A comparator compares the output signal and the reference signal and outputs a resulting error signal. An adaptive processor computes coefficients for the secondary impulse shortening filter based on the error signal.

摘要翻译： 多载波通信系统包括主脉冲缩短滤波器，其接收模数转换器的输出信号并接受系数。 二次脉冲缩短滤波器接收模数转换器的输出信号，输出输出信号，并将系数传递给主脉冲缩短滤波器。 参考信号发生器输出参考信号。 比较器比较输出信号和参考信号，并输出产生的误差信号。 自适应处理器基于误差信号计算二次脉冲缩短滤波器的系数。

公开(公告)号：US08059549B2

公开(公告)日：2011-11-15

申请号：US12378662

申请日：2009-02-17

申请人： Yee Ming Soon ,  Chirayu A. Shah

发明人： Yee Ming Soon ,  Chirayu A. Shah

IPC分类号： G06F11/00

CPC分类号： H04L12/287 ,  H04L12/2859 ,  H04L12/4633 ,  H04L45/50 ,  H04L45/66

摘要： Methods and apparatuses are disclosed for interworking a first protocol, e.g., Provider Backbone Bridge Traffic Engineering (PBB-TE), that provides Ethernet carrier-class traffic engineering, with a second protocol, e.g., Virtual Private LAN Service, that emulates local area network (LAN) service. Unicast, multicast, and broadcast transmissions are enabled across an Ethernet aggregation network and an MPLS core network. Dual homing protection and end-to-end traffic engineering with adjustable granularity are also provided. These capabilities are not available with traditional PBB-TE networks or with an interworking between PBB and VPLS that has been previously proposed. Embodiments of the invention terminate a PBB-TE tunnel at a user-facing provider edge (UPE) node and attach instance service identifiers (ISIDs) to different virtual switching instances (VSI)s. As a result, inexpensive Ethernet-only aggregation networks can be designed to interoperate with VPLS with increased reliability and control, benefiting service providers and end users.

摘要翻译： 公开了用于互通第一协议的方法和装置，例如，提供以太网电信级流量工程的提供商骨干网桥流量工程（PBB-TE）与第二协议（例如，虚拟专用LAN服务），模拟局域网 （LAN）服务。 单播，组播和广播传输在以太网聚合网络和MPLS核心网络之间启用。 还提供双重归位保护和可调颗粒度的端到端流量工程。 这些功能不适用于传统的PBB-TE网络，也不适用于以前提出的PBB和VPLS之间的互通。 本发明的实施例在面向用户的提供商边缘（UPE）节点处终止PBB-TE隧道，并将实例服务标识符（ISID）附加到不同的虚拟交换实例（VSI）。 因此，廉价的仅适用于以太网的聚合网络可以设计为与VPLS进行互操作，具有更高的可靠性和控制性，有利于服务提供商和终端用户。

公开(公告)号：US20110188852A1

公开(公告)日：2011-08-04

申请号：US12715571

申请日：2010-03-02

申请人： Kevin C. Stodola ,  Steven D. Schwager

发明人： Kevin C. Stodola ,  Steven D. Schwager

IPC分类号： H04J14/02 ,  H04B17/00

CPC分类号： H04J14/02 ,  H04B17/00

摘要： Having a fast method to perform impairment evaluation is useful for many networks. A method or corresponding apparatus according to an example embodiment of the present invention maintains a traffic engineering database of values representing characteristics of links in the network through storage of integer values representing advertised optical signal capabilities of links between the multiple optical nodes. The example embodiment determines a path through the network for optical wavelengths to be supported by the links represented in the database as a function of evaluating optical signal characteristics at each link along a possible path using the advertised optical signal capabilities and provides a selected path meeting an acceptable integrity of the optical wavelengths to a path establishment module to establish the path through the optical network. Example embodiments significantly reduce computational complexity associated with impairment evaluation and path selection in an optical network.

摘要翻译： 进行减值评估的快速方法对许多网络很有用。 根据本发明的示例性实施例的方法或对应装置通过存储表示多个光节点之间的链路的广告光信号能力的整数值来维护表示网络中链路特征的值的流量工程数据库。 该示例性实施例确定通过网络的路径，以便由数据库中表示的链路支持的光波长作为使用所通告的光信号能力沿着可能的路径评估每条链路处的光信号特性的函数，并提供满足 将光波长的可接受的完整性提供给路径建立模块以建立通过光网络的路径。 示例性实施例显着降低与光网络中的损伤评估和路径选择相关联的计算复杂度。

公开(公告)号：US20110116571A1

公开(公告)日：2011-05-19

申请号：US13012683

申请日：2011-01-24

申请人： Daniel J. Marchok ,  Richard C. Younce ,  Peter J. W. Melsa

发明人： Daniel J. Marchok ,  Richard C. Younce ,  Peter J. W. Melsa

IPC分类号： H04L27/04

CPC分类号： H04L27/2662 ,  H04L5/023 ,  H04L5/1453 ,  H04L27/20 ,  H04L27/2602 ,  H04L27/2628 ,  H04L27/2647 ,  H04L27/2657

摘要： A method of managing a signal over a symbol period includes supplying samples of the signal at beginning and end portions of the symbol period. The method further includes suppressing the supply of samples of the signal at a middle portion of the symbol period.

摘要翻译： 一种在符号周期上管理信号的方法包括在符号周期的开始和结束部分提供信号的样本。 该方法还包括抑制在符号周期的中间部分处提供信号的样本。

公开(公告)号：US07881184B2

公开(公告)日：2011-02-01

申请号：US11838328

申请日：2007-08-14

申请人： Kenneth R. Owens ,  Srinivas V. Makam ,  Changcheng Huang ,  Vishal Sharma

发明人： Kenneth R. Owens ,  Srinivas V. Makam ,  Changcheng Huang ,  Vishal Sharma

IPC分类号： H04J1/16 ,  H04J3/14

CPC分类号： H04L45/28 ,  H04J3/14 ,  H04L43/0817 ,  H04L45/00 ,  H04L45/22 ,  H04L45/48 ,  H04L45/50 ,  H04L49/552 ,  H04L2012/5627

摘要： Recovery time upon the failure of a link or switching system in an asynchronous data network can be minimized if downstream data switches provide upstream messages indicating to upstream switching system that the downstream traffic arrived in tact and was properly handled. Upon this loss or failure of the upstream status message to an upstream switching system, an upstream switching system can reroute data traffic around a failed link or failed switch with a minimal amount of lost data. The upstream status message is conveyed from a downstream switching system to an upstream switching system via a reverse notification tree data pathway.

摘要翻译： 如果下游数据交换机向上游交换系统提供指示下游流量到达并正确处理的上行消息，则可以最小化异步数据网络中的链路或交换系统故障时的恢复时间。 在向上游交换系统发生上游状态消息的丢失或失败时，上游交换系统可以以最小量的丢失数据重新路由出现故障链路或故障交换机周围的数据流量。 上游状态消息经由反向通知树数据路径从下游交换系统传送到上游交换系统。

公开(公告)号：US20100278189A1

公开(公告)日：2010-11-04

申请号：US12432091

申请日：2009-04-29

申请人： Yee Ming Soon

发明人： Yee Ming Soon

IPC分类号： H04L12/56

CPC分类号： H04L47/10 ,  H04L45/00 ,  H04L47/20 ,  H04L47/24 ,  H04L47/2441 ,  H04L47/2475 ,  H04L47/2483 ,  H04L47/52 ,  H04L49/00 ,  H04L49/3027 ,  H04L49/90 ,  H04L49/9057 ,  H04L49/9094

摘要： A network system and method capable of creating separate output queues on demand to improve overall network routing performance are disclosed. The network system, in one embodiment, includes a classifier, an egress queuing device and a processor. The classifier provides a result of classification for an incoming data flow in accordance with a set of predefined application policies. The egress queuing device is an egress per flow queue (“PFQ”) wherein a separately dedicated queue can be dynamically allocated within the egress PFQ in accordance with the result of classification. The processor is configured to establish a temporary circuit connection between the classifier and the egress queuing device for facilitating routing process.

摘要翻译： 公开了能够根据需要创建单独的输出队列以提高整体网络路由性能的网络系统和方法。 在一个实施例中，网络系统包括分类器，出口排队设备和处理器。 分类器根据一组预定义的应用策略提供输入数据流的分类结果。 出口排队装置是每个流队列（“PFQ”）的出口，其中可以根据分类结果在出口PFQ内动态分配独立的专用队列。 处理器被配置为在分类器和出口排队设备之间建立临时电路连接，以便于路由处理。