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    • 4. 发明授权
    • Router and method for protocol process migration
    • 用于协议进程迁移的路由器和方法
    • US07583590B2
    • 2009-09-01
    • US11182967
    • 2005-07-15
    • Kaarthik SivakumarSuresh BhogavilliSamir ShahChristopher Sherwin
    • Kaarthik SivakumarSuresh BhogavilliSamir ShahChristopher Sherwin
    • H04J1/16H04J3/14
    • H04L45/586H04L45/04H04L45/22
    • A router and a method for migrating routing protocol processes or Virtual Routers (VRs) from one Route Processor (RP) to another using graceful restart procedures for maintaining packet flow to the router and assisting the router to obtain restart information. The router includes first and second RPs and a forwarding engine for forwarding packets to neighbor routers in the network. When the routing protocol process is terminated on the first RP, the neighbor routers detect a router failure and initiate the graceful restart procedures. A filter rule in the forwarding engine causes it to forward packets to the new routing protocol process on the second RP. The new process learns the network topology from the neighbor routers, and the migration is completed without packet loss and without requiring complex changes to the network protocol stack.
    • 路由器和路由协议进程或虚拟路由器(VR)从一个路由处理器(RP)向另一个路由处理器(VR)迁移到另一个路由器和方法,使用平稳的重新启动过程来维护到路由器的分组流,并协助路由器获取重启信息。 路由器包括第一和第二RP以及用于将分组转发到网络中的邻居路由器的转发引擎。 当路由协议进程在第一个RP上终止时,邻居路由器检测到路由器故障,并启动平滑重启过程。 转发引擎中的过滤规则使其将数据包转发到第二RP上的新路由协议进程。 新进程从相邻路由器学习网络拓扑,并且迁移完成而没有丢包,而不需要对网络协议栈进行复杂的更改。
    • 7. 发明授权
    • Low flow irrigation emitter
    • 低流量灌溉发射器
    • US08439282B2
    • 2013-05-14
    • US12367295
    • 2009-02-06
    • Kirk A. AllenRaymond P. FeithGerald E. PetersonSamir Shah
    • Kirk A. AllenRaymond P. FeithGerald E. PetersonSamir Shah
    • B05B1/30B05B15/00A62C37/20F16K31/12F16K31/36
    • A01G25/023Y10T137/7793Y10T137/7796
    • An irrigation emitter is provided for delivering irrigation water from a water supply conduit, such as an irrigation supply tube, pipe, or other water supply apparatus, at a low volume or drip-like flow rate. The emitter operates generally through the use of a reduced size orifice and a relatively long tortuous flow channel that cause a pressure reduction between the water supply conduit and an emitter outlet. The emitter includes an inlet for tapping a portion of the water flow from the water supply conduit and, when the water pressure is above a predetermined minimum level, directing the flow to and through the flow channel for subsequent discharge to a desired location. The emitter also may regulate to accommodate for changes in supply pressure. The emitter also may include multiple emitter outlets.
    • 提供了一种灌溉发射器,用于以低体积或滴滴状流速从诸如灌溉供应管,管道或其它供水装置的供水管道输送灌溉水。 发射器通常通过使用减小尺寸的孔口和相对长的曲折的流动通道来进行,其导致供水管道和发射器出口之间的压力降低。 发射器包括用于分流来自供水管道的一部分水流的入口,并且当水压高于预定的最小水平时,将流体引导到流动通道并通过流动通道,以便随后排出到期望的位置。 发射器也可以调节以适应供应压力的变化。 发射器还可以包括多个发射器出口。
    • 9. 发明授权
    • System and method for achieving path symmetry in an internet protocol (IP) based network
    • 在基于互联网协议(IP)的网络中实现路径对称的系统和方法
    • US07599286B2
    • 2009-10-06
    • US11069178
    • 2005-03-01
    • Suresh BhogavilliSamir ShahKaarthik Sivakumar
    • Suresh BhogavilliSamir ShahKaarthik Sivakumar
    • H04L12/28H04L12/66G06F15/16
    • H04L45/00H04L45/24
    • A system and method for improving network performance when communicating between a first site network and a second site network via an IP-based transport network. The site networks include a LAN, a plurality of host/media gateways (MGWs) connected to the LAN, and pairs of first and second Site Edge Routers (SERs) connected to the LAN for handling traffic from different host/MGWs. The SERs are configured as redundant backup pairs in which each SER in a given pair backs up the other SER in the pair. Each SER is connected to a different Provider Edge (PE) router in the transport network via a dedicated link that has sufficient spare capacity to carry traffic coming from both of the SERs in a given pair of SERs in case one of the SERs fails. The SERs provide preferred routing prefixes to the PE routers, thereby guaranteeing symmetric paths for bidirectional traffic.
    • 一种用于在通过基于IP的传输网络在第一站点网络和第二站点网络之间进行通信时改善网络性能的系统和方法。 站点网络包括LAN,连接到LAN的多个主机/媒体网关(MGW)以及连接到LAN的用于处理来自不同主机/ MGW的流量的第一和第二站点边缘路由器(SER)对。 SER被配置为冗余备份对,其中给定对中的每个SER对备份对中的另一个SER。 每个SER通过专用链路连接到传输网络中的不同提供商边缘(PE)路由器,专用链路具有足够的备用容量,以在一个SER失败的情况下携带来自给定对SER对中的两个SER的流量。 SER为PE路由器提供优选路由前缀,从而保证双向流量的对称路径。
    • 10. 发明申请
    • Router and method for protocol process migration
    • 用于协议进程迁移的路由器和方法
    • US20070014231A1
    • 2007-01-18
    • US11182967
    • 2005-07-15
    • Kaarthik SivakumarSuresh BhogavilliSamir ShahChristopher Sherwin
    • Kaarthik SivakumarSuresh BhogavilliSamir ShahChristopher Sherwin
    • H04L12/56H04L12/28H04L12/26H04J3/14H04J1/16H04L1/00
    • H04L45/586H04L45/04H04L45/22
    • A router and a method for migrating routing protocol processes or Virtual Routers (VRs) from one Route Processor (RP) to another using graceful restart procedures for maintaining packet flow to the router and assisting the router to obtain restart information. The router includes first and second RPs and a forwarding engine for forwarding packets to neighbor routers in the network. When the routing protocol process is terminated on the first RP, the neighbor routers detect a router failure and initiate the graceful restart procedures. A filter rule in the forwarding engine causes it to forward packets to the new routing protocol process on the second RP. The new process learns the network topology from the neighbor routers, and the migration is completed without packet loss and without requiring complex changes to the network protocol stack.
    • 路由器和路由协议进程或虚拟路由器(VR)从一个路由处理器(RP)到另一个路由处理器(VR)的方法,使用平稳的重新启动过程将数据包流维护到路由器,并协助路由器获取重启信息。 路由器包括第一和第二RP以及用于将分组转发到网络中的邻居路由器的转发引擎。 当路由协议进程在第一个RP上终止时,邻居路由器检测到路由器故障,并启动平滑重启过程。 转发引擎中的过滤规则使其将数据包转发到第二RP上的新路由协议进程。 新进程从相邻路由器学习网络拓扑,并且迁移完成而没有丢包,而不需要对网络协议栈进行复杂的更改。