公开(公告)号：US20050041601A1

公开(公告)日：2005-02-24

申请号：US10887249

申请日：2004-07-08

申请人： Anthony Kam ,  Raymond Xie ,  Tao Yang ,  Naimish Patel

发明人： Anthony Kam ,  Raymond Xie ,  Tao Yang ,  Naimish Patel

IPC分类号： G06F20060101 ,  H04J1/16 ,  H04L12/26 ,  H04L12/28

CPC分类号： H04J3/14 ,  H04J3/1611

摘要： A shared protect link extends between adjacent nodes that are shared by two or more adjacent BLSR rings. The shared protect link obviates the need for separate protect links between the adjacent nodes for each of the rings. A composite BLSR controller resides in each of the adjacent nodes. The composite BLSR controllers coordinate usage of the shared protect link, for example as a result of a span switch or a ring switch request. The composite BLSR controllers also coordinate transmission of signaling information for each of the rings over the common span between the adjacent nodes. In one embodiment, the signaling information is sent over separate channels of the common span. In another embodiment, the signaling information is multiplexed over the shared protect link. Each ring can be assigned a ring ID. The communication protocol between the adjacent nodes can be modified to tag the signaling information with the appropriate ring ID. The composite BLSR controller can include a standard BLSR controller for each of the adjacent rings and a translator logically between the standard BLSR controllers and the spans.

摘要翻译： 共享保护链路在由两个或更多个相邻BLSR环共享的相邻节点之间延伸。 共享保护链路消除了对于每个环的相邻节点之间的单独保护链路的需要。 复合BLSR控制器驻留在每个相邻节点中。 复合BLSR控制器协调共享保护链路的使用，例如作为跨度交换机或环网交换机请求的结果。 复合BLSR控制器还协调在相邻节点之间的公共跨度上的每个环的信令信息的传输。 在一个实施例中，信令信息在公共跨度的不同信道上发送。 在另一个实施例中，信令信息在共享保护链路上被复用。 每个戒指都可以分配一个戒指ID。 可以修改相邻节点之间的通信协议，以使用适当的环ID标记信令信息。 复合BLSR控制器可以包括用于每个相邻环的标准BLSR控制器和逻辑上在标准BLSR控制器和跨度之间的转换器。

公开(公告)号：US20050041575A1

公开(公告)日：2005-02-24

申请号：US10886154

申请日：2004-07-07

申请人： Anthony Kam ,  Raymond Xie ,  Tao Yang ,  Naimish Patel

发明人： Anthony Kam ,  Raymond Xie ,  Tao Yang ,  Naimish Patel

IPC分类号： G06F20060101 ,  H04J1/16 ,  H04L12/26 ,  H04L12/28

CPC分类号： H04J3/14 ,  H04J3/1611

摘要： Each span of a communication network, such as a BLSR ring, is assigned a unique span ID. When a node of the network detects a failure in a span (including a straddling span) of the network, the node exchanges commands, according to an automatic protection switching (APS) protocol, that request other nodes of the network to switch network traffic from a working span (including a straddling span) to a protect span. The commands specify the working span by its span ID, without necessarily specifying a source node ID or a destination node ID for the commands. The span ID occupies fewer bits in the commands than a combination of the source node ID and the destination node ID. Consequently, the messages can accommodate span IDs larger than four bits, and networks can have more than 16 nodes. Alternatively, the commands specify a destination node ID without a span ID or a source node ID, or the commands specify a source node ID without a span ID or a destination node ID. Alternatively, a straddling span is identified by node IDs of its two nonadjacent terminal nodes. A set of rules governs straddling span switching. Optionally or in addition, more than four bits are available for bridge requests command codes in the messages. Thus, more than 16 unique bridge requests commands can be defined.

摘要翻译： 诸如BLSR环的通信网络的每个跨度被分配唯一的跨度ID。 当网络的节点检测到网络的跨度（包括跨度跨度）的故障时，节点根据自动保护倒换（APS）协议交换命令，请求网络的其他节点将网络流量从 工作范围（包括跨跨跨度）到保护范围。 这些命令通过其跨度ID指定工作范围，而不必为命令指定源节点ID或目标节点ID。 与源节点ID和目标节点ID的组合相比，该范围ID在命令中占用较少的位。 因此，消息可以容纳大于四位的跨度ID，并且网络可以具有多于16个节点。 或者，命令指定没有跨度ID或源节点ID的目标节点ID，或者该命令指定没有跨度ID或目的地节点ID的源节点ID。 或者，跨越跨度由其两个不相邻终端节点的节点ID标识。 一套规则管理跨越跨度切换。 可选地或另外，消息中的桥请求命令码可以有四位以上。 因此，可以定义超过16个独特的桥请求命令。

公开(公告)号：US07826345B2

公开(公告)日：2010-11-02

申请号：US10886154

申请日：2004-07-07

申请人： Anthony C. K. Kam ,  Raymond Y. Xie ,  Tao Yang ,  Naimish Patel

发明人： Anthony C. K. Kam ,  Raymond Y. Xie ,  Tao Yang ,  Naimish Patel

IPC分类号： H04J1/16

CPC分类号： H04J3/14 ,  H04J3/1611

摘要： Each span of a communication network, such as a BLSR ring, is assigned a unique span ID. When a node of the network detects a failure in a network span, the node exchanges commands, according to an automatic protection switching (APS) protocol, that request other nodes of the network to switch network traffic from a working span to a protect span. The commands specify the working span by its span ID, without necessarily specifying a source node ID or a destination node ID for the commands. The span ID occupies fewer bits in the commands than bits representing a combination of the source node ID and the destination node ID. Alternatively, the commands specify a destination node ID without a span ID or a source node ID, or the commands specify a source node ID without a span ID or a destination node ID.

摘要翻译： 诸如BLSR环的通信网络的每个跨度被分配唯一的跨度ID。 当网络的节点检测到网络跨度的故障时，节点根据自动保护倒换（APS）协议交换命令，请求网络的其他节点将网络流量从工作跨度切换到保护范围。 这些命令通过其跨度ID指定工作范围，而不必为命令指定源节点ID或目标节点ID。 与表示源节点ID和目的地节点ID的组合的位相比，跨度ID在命令中占用较少的比特。 或者，命令指定没有跨度ID或源节点ID的目标节点ID，或者该命令指定没有跨度ID或目的地节点ID的源节点ID。

公开(公告)号：US06549312B2

公开(公告)日：2003-04-15

申请号：US09852428

申请日：2001-05-09

申请人： Paolo Narvaez ,  Naimish Patel ,  Farzana I. Khatri ,  Murat Azizoglu ,  Kayi Lee

发明人： Paolo Narvaez ,  Naimish Patel ,  Farzana I. Khatri ,  Murat Azizoglu ,  Kayi Lee

IPC分类号： H04J1402

CPC分类号： G02B6/29383 ,  H04J14/02 ,  H04J14/0206 ,  H04J14/0208 ,  H04J14/0213

摘要： A method is provided for optical filter card design that facilitates a relatively efficient filter assignment algorithm solution resulting in a filter design that reduces a probability of unnecessary wavelength regenerations.

公开(公告)号：US08811038B2

公开(公告)日：2014-08-19

申请号：US13294858

申请日：2011-11-11

申请人： Scott Downer ,  Naimish Patel

发明人： Scott Downer ,  Naimish Patel

IPC分类号： H02M3/335 ,  H02M3/28

CPC分类号： H02M3/28 ,  Y02B70/1491

摘要： A switching and control arrangement are provided along with a transformer arrangement such that semiconductor-based switches can be used in a medium DC voltage to AC inverter in a medium voltage to low voltage DC to DC converter. The switching arrangement on the secondary side of the transformer arrangement controls a current ramp up or down of switches on the primary side of the transformer that are used to convert DC to AC, thereby permitting for soft switching of those switches.

摘要翻译： 提供开关和控制装置以及变压器布置，使得基于半导体的开关可以在中压至低压DC至DC转换器中的AC逆变器的中等DC电压中使用。 变压器装置的次级侧的开关装置控制变压器初级侧的开关的电流斜坡上升或下降，用于将DC转换成AC，从而允许这些开关的软开关。

公开(公告)号：US06865154B1

公开(公告)日：2005-03-08

申请号：US09257725

申请日：1999-02-25

申请人： Anna Charny ,  Pattabhiraman Krishna ,  Naimish Patel

发明人： Anna Charny ,  Pattabhiraman Krishna ,  Naimish Patel

IPC分类号： H04L12/56 ,  H04Q11/04 ,  H04L12/26 ,  H04L12/16

CPC分类号： H04Q11/0478 ,  H04L49/101 ,  H04L49/205 ,  H04L49/254 ,  H04L49/3018 ,  H04L49/3027

摘要： A system is described where delay and bandwidth guarantees are implemented with a crossbar switch. A rate controller is provided as a front-end to a crossbar switch with an arbiter running a work-conserving arbitration algorithm. The system provides bandwidth and delay guarantees to all properly behaving flows independently of improperly behaving flows.

摘要翻译： 描述了用交叉开关实现延迟和带宽保证的系统。 速率控制器作为前端提供给交叉开关，仲裁器运行省电的仲裁算法。 系统为所有正常行为的流量提供带宽和延迟保证，而与不正常行为流无关。

公开(公告)号：US06754208B2

公开(公告)日：2004-06-22

申请号：US09920434

申请日：2001-08-01

申请人： Anthony Chi-Kong Kam ,  Naimish Patel

发明人： Anthony Chi-Kong Kam ,  Naimish Patel

IPC分类号： H04Q100

CPC分类号： H04Q3/68

摘要： A method and apparatus are disclosed for spreading the component signals of a groomed input circuit through a three-stage CLOS switch network. The spreading algorithm includes sequentially evaluating each midstage switching module as to the availability of a connection between an assigned source switching module and an assigned destination switching module having sufficient spare bandwidth to accommodate one or more of the component signals. A load sharing algorithm can be used to spread the component signals among the midstage switching stages. In this way the available bandwidth of each of the midstage switching modules is evaluated for each of the component signals and each component signal is routed through the midstage switching module having the largest available bandwidth.

摘要翻译： 公开了一种通过三级CLOS开关网络来扩展经修整的输入电路的分量信号的方法和装置。 扩展算法包括对分配的源交换模块和具有足够的备用带宽的分配的目的地交换模块之间的连接的可用性顺序地评估每个中间级交换模块以适应一个或多个分量信号。 负载分担算法可用于在中级切换级之间扩展分量信号。 以这种方式，为每个分量信号评估每个中间级交换模块的可用带宽，并且每个分量信号通过具有最大可用带宽的中间级交换模块路由。

公开(公告)号：US06839871B2

公开(公告)日：2005-01-04

申请号：US09779190

申请日：2001-02-08

申请人： Naimish Patel ,  Richard A. Barry ,  Paolo Narvaez ,  Anthony Chi-Kong Kam

发明人： Naimish Patel ,  Richard A. Barry ,  Paolo Narvaez ,  Anthony Chi-Kong Kam

IPC分类号： H04J3/06 ,  H04J3/14 ,  H04Q11/04 ,  G06F11/00

CPC分类号： H04J3/14 ,  H04J3/0602 ,  H04J2203/006 ,  H04J2203/0089 ,  H04Q11/0478

摘要： Indicia are provided to a client of Out-of-Frame errors and message bit parity errors that occur during the transmission of a message through a network, wherein the message includes the client data multiplexed with other data and formatted into a message that includes a plurality of transport overhead bytes. The transport overhead bytes of the multiplexed can include both defined bytes and undefined bytes. Predetermined bytes in the transport overhead may be used to store indicia of errors that are detected during the message transmission. These predetermined bytes are read by the client at the egress of the network. The transport overhead may contain both a section overhead portion and a line overhead portion and the predetermined bytes may be encoded in either a subset of the section or line overhead bytes. In addition, the indicia of errors may be encoded in an undefined portion of the section or line overhead. Alternatively, a portion of the section or line overhead that is defined may be redefined and used to store the encoded error indicia

公开(公告)号：US06400479B1

公开(公告)日：2002-06-04

申请号：US09467607

申请日：1999-12-20

申请人： Jianying Zhou ,  Richard A. Barry ,  Naimish Patel

发明人： Jianying Zhou ,  Richard A. Barry ,  Naimish Patel

IPC分类号： H04B1000

CPC分类号： H04J14/0221 ,  H04B10/07953 ,  H04B10/07955 ,  H04B10/296

摘要： A wavelength division multiplexed (WDM) optical communications network is configured and operated to enable transmitter output power for a given wavelength channel to be adjusted to achieve a desired optical signal-to-noise ratio (OSNR) for the channel independently of the power levels of other optical signals carried on the same path. Optical amplifiers in the optical links extending between the transmitter and an optical receiver are configured to operate with constant gain over a specified range of input optical signal power, and the links are configured such that the power level of the signal provided to each optical amplifier is within the specified range of input signal power to prevent the deep saturation of the optical amplifiers due to optical amplifier cascading. When a channel is being added or adjusted, the OSNR of the optical communications signal received by the receiver is measured, and the power of the signal transmitted by the transmitter is adjusted to attain a desired OSNR at the receiver. Due to the constant-gain operation and input power control of the optical amplifiers, the OSNRs of other signals carried on the path are not affected, so that it is unnecessary to adjust the output power of other transmitters providing signals to the path.

摘要翻译： 波分复用（WDM）光通信网络被配置和操作以使得能够调整给定波长信道的发射机输出功率，以实现与所述信道的功率电平无关的所述信道的期望的光信噪比（OSNR） 在同一路径上承载的其他光信号。 在发射器和光接收器之间延伸的光链路中的光放大器被配置为在指定的输入光信号功率范围内以恒定增益工作，并且链路被配置为使得提供给每个光放大器的信号的功率电平为 在指定范围内的输入信号功率，以防止由于光放大器级联而导致的光放大器的深度饱和。 当添加或调整频道时，测量由接收机接收的光通信信号的OSNR，并且调整由发射机发射的信号的功率以在接收机处获得期望的OSNR。 由于光放大器的恒定增益操作和输入功率控制，路径上承载的其他信号的OSNR不受影响，因此不需要调整向路径提供信号的其他发射机的输出功率。

公开(公告)号：US20130121030A1

公开(公告)日：2013-05-16

申请号：US13294858

申请日：2011-11-11

申请人： Scott Downer ,  Naimish Patel

发明人： Scott Downer ,  Naimish Patel

IPC分类号： H02M3/24

CPC分类号： H02M3/28 ,  Y02B70/1491

摘要： A switching and control arrangement are provided along with a transformer arrangement such that semiconductor-based switches can be used in a medium DC voltage to AC inverter in a medium voltage to low voltage DC to DC converter. The switching arrangement on the secondary side of the transformer arrangement controls a current ramp up or down of switches on the primary side of the transformer that are used to convert DC to AC, thereby permitting for soft switching of those switches.

摘要翻译： 提供开关和控制装置以及变压器布置，使得基于半导体的开关可以在中压至低压DC至DC转换器中的AC逆变器的中等DC电压中使用。 变压器装置的次级侧的开关装置控制变压器初级侧的开关的电流斜坡上升或下降，用于将DC转换成AC，从而允许这些开关的软开关。