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| Number | Title | Issue Date |
| 8179785 | Deterministic switching protection over aggregated links An apparatus and method for improving network efficiency during an automatic switchover are disclosed. Upon receipt of a switching request from a first network peer (“NP”) transmitted via a connection containing multiple links, a process capable of providing aut... | 05/15/2012 |
| 8174963 | Data relay apparatus and failure recovery method A data relay apparatus that recovers a failure in a network that shares a part of a plurality of rings and avoids occurrence of a loop path by providing a block in each of the rings includes a failure-notification-packet transmitting unit that transmits, when a fail... | 05/08/2012 |
| 8174964 | Detecting unavailable network connections A method for detecting unavailable network connections comprises, at a first data processing node that is hosting a transport protocol connection that uses a plurality of sequence values to identify messages sent to a peer node, wherein the first node is communicati... | 05/08/2012 |
| 8169893 | Quick detection of problematic link to support fast failover A technique involves operating an electronic device having data communications ports. Each data communications port includes PHY circuitry to provide Physical Layer network functionality to the electronic device. The technique includes monitoring a particular PCS st... | 05/01/2012 |
| 8169894 | Fault-tolerant communications in routed networks A method for providing fault-tolerant network communications between a plurality of nodes for an application, including providing a plurality of initial communications pathways over a plurality of networks coupled between the plurality of nodes, receiving a data pac... | 05/01/2012 |
| 8149689 | Communication system having route redundancy A packet communication system of this invention includes a user access device at a user point for providing a user with connectivity to a plurality of carriers, carrier communication networks linked to the user access device, and a carrier management network which c... | 04/03/2012 |
| 8139477 | Network element bypass in computing computer architecture A method and apparatus in accordance with the present invention provides monitoring a self-adjusting multi-tier processing system. At least one computing resource of one of the tiers of the self-adjusting multi-tier processing system is dynamically bypassed based on... | 03/20/2012 |
| 8139476 | Optical ring networks using circulating optical probe in protection switching with automatic reversion Techniques and apparatus for optical communication networks including fiber ring networks with protection switching to maintain optical communications when an optical failure occurs and to automatically revert to normal operation when the optical failure is correcte... | 03/20/2012 |
| 8125893 | Method, system, and network entity for performing a switch-over A method, a system, and a network entity for performing the switch-over of a protected Label Switched Path (LSP) in (less than) 50 ms. A goal of the preferable arrangement is to move the tasks related to the switch-over away from the CPU to hardware (HW). The ASIC a... | 02/28/2012 |
| 8107360 | Dynamic addition of redundant network in distributed system communications Disclosed is a computer implemented method and apparatus for establishing a redundant channel from an application to a peer data processing system. The interrupt-driven hot standby program receives, through the operation of a data processing system, a communication ... | 01/31/2012 |
| 8107358 | Method, computer program product, and network node element for more quickly detecting faults on transmission paths and/or in nodes A communication between network node elements (routers), according to which the routes communicate with one another using a link-state protocol, e.g. IS-IS or OSPF and the failure of a network node element can be identified more rapidly than by the evaluation of hel... | 01/31/2012 |
| 8107359 | Performing a changeover from a first virtual node to a second virtual node Apparatus for non-disruptive error recovery in a clustered system, comprises a node instance configuration activity quiescing component for quiescing configuration activity at a first virtual node instance; a node instance creation component for creating a second vi... | 01/31/2012 |
| 8102760 | Method for reconvergence after failure in a dual-homing network environment A manner of providing for re-convergence in a dual homing network following the failure of one of the dual homing links. When such a failure is detected, the port roles are recomputed using an xSTP protocol. Prior to the completion of the computation, the operEdge v... | 01/24/2012 |
| 8098574 | Global ports in multi-switch systems Global ports are supported in multi-switch systems having arbitrary topologies. In some implementations, global ports are implemented in a manner which makes the switch system robust in the face of link failure. In specific Ethernet implementations, global ports ena... | 01/17/2012 |
| 8089863 | RF site resilience using multiple visitor location registers simultaneously A method and system are presented in which communication redundancy is provided. Multicast packets having the same audio and/or control data are simultaneously transmitted between an RF site and different switches through different communication links. The packets f... | 01/03/2012 |
| 8077602 | Performing dynamic request routing based on broadcast queue depths Mechanisms for performing dynamic request routing based on broadcast depth queue information are provided. Each processor chip in the system may use a synchronized heartbeat signal it generates to provide queue depth information to each of the other processor chips ... | 12/13/2011 |
| 8072877 | Arrangement in a distributed control system for increasing the availability of data and/or control commands There is a need for increasing the availability of data and/or control commands in a distributed control system for one or more machines, vehicles and/or processes. The control system comprises or is controlled by a transmitting node or transmitter unit and has two ... | 12/06/2011 |
| 8064334 | Method for implementing intersecting ring network with arbitrary topology, node and intersecting ring network The present invention discloses a method for implementing an intersecting ring network with arbitrary topology, node and an intersecting ring network. The method includes: intersecting multiple Ethernet rings to form the intersecting ring network with arbitrary topo... | 11/22/2011 |
| 8059526 | N+1 protection using a processor-based protection device In an N+1 protection scheme for a router in a data or telecommunications network, a processor-based protection unit has a replica device handle, corresponding to each of the N working units, stored in the protection unit's local memory. Each replica device handle is... | 11/15/2011 |
| 8050174 | Self-healing chip-to-chip interface A method, apparatus, and computer instructions for managing a set of signal paths for a chip. A defective signal path within the set of signal paths for the chip is detected. Signals are re-routed through the set of signal paths such that the defective signal path i... | 11/01/2011 |
| 8040791 | Coordinated channel change in mesh networks A coordinated channel change system. In particular implementations, a method includes receiving a prepare-to-change message, wherein the prepare-to-change message indicates instructions to prepare to change channels and includes a designated channel, and forwarding ... | 10/18/2011 |
| 8036104 | Methods and apparatus for improving resiliency of communication networks Techniques for supporting fault tolerance in communications systems are described. Fault notification messages are communicated which may be affected by a detected/reported service disruption. End nodes receiving a fault notification message determine if the message... | 10/11/2011 |
| 8036105 | Monitoring a problem condition in a communications system A solution for monitoring a problem condition in a communications system is provided. A communications protocol implementation monitors the communications system for the problem condition. The communications protocol implementation can initiate a response based on t... | 10/11/2011 |
| 8023405 | Method for activation of preplanned circuits in telecommunications networks A method for activation of circuits in telecommunications networks comprises a first step in which circuits are preplanned in the network and local definition data are distributed to network members (NE) for connection of sections of the preplanned circuits. In a se... | 09/20/2011 |
| 8018836 | Route confirmation method and device In order to preliminarily confirming whether or not a protection route to be switched over can be safely switched over during a working route being used in a unicast or multicast mode. a notification of communication confirmation/quality confirmation or multicast co... | 09/13/2011 |
| 8018837 | Self-healing chip-to-chip interface A method, apparatus, and computer instructions for managing a set of signal paths for a chip. A defective signal path within the set of signal paths for the chip is detected. Signals are re-routed through the set of signal paths such that the defective signal path i... | 09/13/2011 |
| 8014275 | Devices, systems, and/or methods for monitoring IP network equipment Certain exemplary embodiments can provide a method, which can comprise, from a central routing device of a plurality of central routing devices, automatically polling each of a plurality of Provider Edge routers with Bidirectional Forwarding Detection protocol messa... | 09/06/2011 |
| 8009555 | Mechanism for transparent real-time media server fail-over with idle-state nodes In one embodiment, a mechanism for transparent real-time media server fail-over with idle-state nodes is disclosed. In one embodiment, a method includes replicating a start time of a request related to a bidirectional stream of media sent to an original master media... | 08/30/2011 |
| 7995463 | Transmission device A transmission device includes a synchronous transmission network interface section, a switch section, first and second LAN interface sections, a distribution section, and a transmission and reception section, and said second LAN interface section includes a de-mapp... | 08/09/2011 |
| 7983148 | Disaster recovery via alternative terminals and partitioned networks An enterprise network is provided that includes a plurality of internal terminals 108, 112 corresponding to a plurality of subscribers and a network reconfiguration agent 212 operable to (a) determine that at least one of a requested connection to a fi... | 07/19/2011 |
| 7983149 | Line accommodation device and control method thereof The present invention provides a line accommodation device comprising at least one first communication control unit for controlling information transmission/reception to/from a first communication system, at least one second communication control unit for controllin... | 07/19/2011 |
| 7978596 | Connection-oriented network node A connection-oriented network node capable of becoming an originating node of a protection path serving as a bypath of a protection segment included in a working path in a network system in which data is transferred via a path previously set up between nodes, compri... | 07/12/2011 |
| 7974183 | Method for restoration and normalization in a mesh network The present invention is directed to methods for signaling that enable bandwidth reservation, path restoration, path normalization, and path removal in a mesh network that supports shared mesh restoration. ... | 07/05/2011 |
| 7965624 | Data link fault tolerance A method is provided for automatically generating code to define and control a system of connected hardware elements. The method comprises: accepting a system configuration macro with sub-macros for system elements, subsystem elements, and connections there between;... | 06/21/2011 |
| 7961596 | Ring-shaped redundant communication path control method In a ring redundant communication path control method, each of transfer apparatuses periodically transmits an inspection frame for inspecting a communication path, detects a failure of the communication path when the inspection frame is not received for a fixed time... | 06/14/2011 |
| 7957268 | Cooperative TCP / BGP window management for stateful switchover A system and method for performing stateful switchover with reduced data, such as only metadata about a TCP window state. The metadata comprises a size of TCP packets used to send BGP messages, and which of those have been acknowledged by a neighbor networking devic... | 06/07/2011 |
| 7948872 | Backplane interface adapter with error control and redundant fabric A backplane interface adapter with error control and redundant fabric for a high-performance network switch. The error control may be provided by an administrative module that includes a level monitor, a stripe synchronization error detector, a flow controller, and ... | 05/24/2011 |
| 7944812 | Redundant intermediary switch solution for detecting and managing fibre channel over ethernet FCoE switch failures A method for detecting a switch failure and managing switch failover in a Fiber Channel over Ethernet network. The plurality of Fiber Channel over Ethernet switches are connected to an intermediary Ethernet switch and to each other via an Ethernet connection. The in... | 05/17/2011 |
| 7944811 | Multiple multicast forwarder prevention during NSF recovery of control failures in a router In one embodiment, a multicast router initiates non-stop forwarding (NSF) recovery. In the NDF recovery, data traffic forwarding operations continue throughout a data plane of the multicast router in the presence of a failure in a control plane of the multicast rout... | 05/17/2011 |
| 7940647 | Method and node for implementing multicast fast reroute A method for implementing multicast fast reroute includes: determining a route for a backup LSP according to the tree topology of a point-to-multipoint primary LSP and establishing the backup LSP according to the determined route for the backup LSP. In the process o... | 05/10/2011 |
