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| Number | Title | Issue Date |
| 8169896 | Connectivity fault management traffic indication extension A method in a Maintenance Association Endpoint, MEP, for controlling traffic between a first network element and a second network element connected by a working Traffic Engineering Service Instance, TESI, and a protection TESI. The first network element sets a Traff... | 05/01/2012 |
| 8165015 | Modifying a rate based on at least one performance characteristic Network operating methods provide a first packet switch configured to send a plurality of packets from the first packet switch to a second packet switch via a network path traversing one or more intermediate packet switches, access data describing at least one perfo... | 04/24/2012 |
| 8165016 | Method and apparatus for setting communication paths in a network Two path setting sides are determined between a pair of nodes in a network, and two path setting messages are created. The two path setting messages each includes information on a path switch default direction, a wait-to-restore timer value, and a mode identifier id... | 04/24/2012 |
| 8165017 | GMPLS fast re-route for OADM and AUX 10MBPS support Embodiments of the present invention provide a GMPLS fast re-route of packets within a network using a multicast address and a table comprising a list of alias IP addresses. According to various embodiments of the invention an alternate data path from a source node ... | 04/24/2012 |
| 8159937 | Seamless tree creation and movement In an example embodiment, a beacon is sent on all available interfaces of a device comprising data indicating the operating parameters of all interfaces of the device. A beacon containing data about the configuration of a first interface and a second interface is se... | 04/17/2012 |
| 8144576 | System and method for Ethernet protection switching in a provider backbone bridging traffic engineering domain A system and method of providing Ethernet protection switching in a PBB-TE Domain. Two PBB-TE trunks are established between a first B-component and a second B-component. Each trunk includes two unidirectional Ethernet Switching Paths (ESPs), each associated with a ... | 03/27/2012 |
| 8139479 | Health probing detection and enhancement for traffic engineering label switched paths A method performed by a network device may include establishing performance-based Bidirectional Forwarding Detection (BFD) sessions for each link of a primary traffic engineering Label Switched Path (TE-LSP) and establishing performance-based BFD sessions for each l... | 03/20/2012 |
| 8134920 | Device and method for correcting a path trouble in a communication network In a disclosed backup path bandwidth keeping method for keeping bandwidth of a backup path to which an active path is switched when the active path becomes unavailable in nodes of a communication network, each node is connected to the same destination, and the metho... | 03/13/2012 |
| 8116197 | Method for finding protected path in mesh networks A method of finding a primary communication path in a mesh network, which would be at once a protected path having a fully guaranteed segmented node or node-link protection. The method comprises defining a required protection type and further selecting each specific... | 02/14/2012 |
| 8111617 | Multiple independent pathway communications A system and method for utilizing multiple independent communication pathways for communication. Various aspects of the present invention may comprise receiving a first signal directly from a first communication network, where the first signal communicates a unit of... | 02/07/2012 |
| 8107363 | Method and apparatus for accelerating failover of VPN traffic in an MPLS provider network Failover of VPN traffic between MPLS tunnels may be accelerated by determining a main and a standby MPLS tunnel for each VPN and passing both the main and standby MPLS tunnel information to the forwarding plane of a network element configured to implement the VPN. I... | 01/31/2012 |
| 8068412 | Link selection schemes for avoiding channel contention A connection in an optical communication system is routed over a sequence of cross-connects and aggregated links comprising multiple links. A different link selection algorithm is used for service provisioning than is used for restoration, i.e., after a cable cut or... | 11/29/2011 |
| 8054743 | Mobile communication terminal, communication apparatus, mobile communication method, and communication method An object of the present invention is to make it possible to appropriately maintain PPP-based communications even in an environment in which the terminal moves and the communication environment continually changes. A mobile communication terminal comprises a plurali... | 11/08/2011 |
| 8050176 | Methods and systems for a data processing system having radiation tolerant bus A bus management tool that allows communication to be maintained between a group of nodes operatively connected on two busses in the presence of radiation by transmitting periodically a first message from one to another of the nodes on one of the busses, determining... | 11/01/2011 |
| 8045452 | Method for handling fault between an egress label switching router and a data device connected therewith Disclosed is a method for handling fault between an Egress LSR and an Egress data device connected with it, including the following steps: an Egress Label Switching Router (LSR) transmitting fault information to an Ingress LSR after detecting a fault of an Egress Wo... | 10/25/2011 |
| 8031592 | Network having redundancy properties, Ethernet switch for such a network and method for configuring such a network There is described a network having redundancy properties, an Ethernet switch, and a method for configuring the network. At least two network segments which are formed with a plurality of Ethernet switches are connected to one another by means of a redundant connect... | 10/04/2011 |
| 8004968 | Provider edge-controlled redundancy using pseudo link aggregation control protocol In one embodiment, a system comprises a plurality of provider edge (PE) devices, the PE devices having a plurality of ports; and a pseudo-link aggregation control protocol (LACP) module instantiated for each of the ports. The pseudo-LACP module allows the PE devices... | 08/23/2011 |
| 7990852 | Methods and apparatus for improving network communication using BFD and VRRP tracking system An apparatus and method of a network system between a host and a group of routers using virtual router redundancy protocol (“VRRP”) messages and bidirectional forwarding detection (“BFD”) sessions are disclosed. The network system is capable of facilitating ... | 08/02/2011 |
| 7965626 | System and method for transferring data on a data network using multiple paths Embodiments of the invention provide a system and method for transferring data on a data network using multiple paths. In one embodiment, data is transferred across a default path of a network. Next, a data loss rate is determined on the default path. When the data ... | 06/21/2011 |
| 7961603 | Path management for enhanced protection Methods and node capable of establishing link-weights based on protection-factor linked to protection level of a plurality of links between a source node and a destination node and capable of establishing primary and, potentially, protection path proposals using the... | 06/14/2011 |
| 7952994 | Redundancy method and switch apparatus A redundancy method in which a network is made redundant with a working path and a protection path. The method includes transmitting a working system supervising frame and a protection system supervising frame from a switch apparatus on transmission side to the work... | 05/31/2011 |
| 7948874 | Transitioning a virtual interface from one tunnel to another tunnel Packet switch operating methods and packet switches provision a plurality of tunnels on a packet switch by associating each of the plurality of tunnels with a packet switch port and by configuring the packet switch to modify packets relayed by the tunnel to include ... | 05/24/2011 |
| 7944817 | Hierarchical virtual trunking over packet networks The present invention establishes reserved paths between nodes in a central packet network and in local networks attached to the central network. Each reserved path has a defined bandwidth and may be implemented as an LSP in an MPLS network or as a PVC in an ATM net... | 05/17/2011 |
| 7944818 | High-availability communication system There is described a communication system for reliable communication between communication stations, wherein there is at least one communication connection between the communication stations, wherein the communication connection features at least two channels for tr... | 05/17/2011 |
| 7940652 | Pseudowire protection using a standby pseudowire Providing protection to network traffic includes sending a Pseudowire protection configuration parameter for configuring a standby Pseudowire between a source node and a destination node, receiving a Pseudowire configuration acknowledgement indicating whether the Ps... | 05/10/2011 |
| 7936667 | Building backup tunnels for fast reroute in communications networks In one embodiment, a method includes identifying at a node, a destination for which a primary path is defined between the node and the destination, transmitting a request message to a neighbor node for routing information for a backup path between the node and the d... | 05/03/2011 |
| 7933199 | Transmission system, path control method and transmission device The present invention is a transmission system, a path control method, and a transmission device, and is the path control method in the transmission system forming a virtual concatenation group by virtually concatenating each path signal transmitted through a plural... | 04/26/2011 |
| 7889641 | Path flow formulation for fast reroute bypass tunnels in MPLS networks A path-flow formulation of defining MPLS FRR bypass LSPs is presented. The path-flow formulation comprises first identifying a set of candidate bypass LSPs, each of which meets various network constraints and has an explicit route around a network facility to be pro... | 02/15/2011 |
| 7889642 | GMPLS fast re-route for OADM and AUX 10Mbps support Embodiments of the present invention provide a GMPLS fast re-route of packets within a network using a multicast address and a table comprising a list of alias IP addresses. According to various embodiments of the invention an alternate data path from a source node ... | 02/15/2011 |
| 7885184 | Method and apparatus for re-establishing anonymous data transfers One embodiment of the present method and apparatus for re-establishing anonymous data transfers between a first endpoint and a second endpoint in a network includes receiving, from a first node, the identity of a second node connected to the first node, where at lea... | 02/08/2011 |
| 7885183 | Method for recovering service forward routing and system thereof A method for recovering service forward routing includes the steps of: suppressing the service forward routing on a standby link from changing during a routing learning process when a primary link recovers from a fault state to a normal state, establishing a label d... | 02/08/2011 |
| 7872967 | Apparatus and method for multi-protocol label switching label-switched path protection switching Provided are system and method for multi-protocol label switching (MPLS) label-switched path (LSP) protection switching in an MPLS system employing a working LSP and a protection LSP in a 1:1 mode, The system includes: an ingress node multicasting input MPLS traffic... | 01/18/2011 |
| 7869351 | Communication techniques and generic layer 3 automatic switching protection In one embodiment, software code in a respective computer system such as one or more data communication devices establishes multiple layer 2 network links between a first data communication device and a second data communication device. The first data communication ... | 01/11/2011 |
| 7869350 | Method and apparatus for determining a data communication network repair strategy A method is disclosed for determining a repair strategy for a data communication network. The data communication network has as components nodes and links. The method comprises a step of implementing a link repair strategy for an adjacent link to an adjacent node. T... | 01/11/2011 |
| 7855953 | Method and apparatus for managing forwarding of data in an autonomous system A method of managing forwarding of data in a first autonomous system (AS) is described. The first AS includes a plurality of border routers having inter-domain links to one or more remote AS's and an associated exterior communications protocol. The border routers us... | 12/21/2010 |
| 7852755 | Device and method for maintaining a telephone call during power failures in an IP network A communication device comprises a first transmitter configured to transmit a telephone signal via a broadband-communication link to an IP network, and a second transmitter configured to transmit a telephone signal via an alternative communication link to a telephon... | 12/14/2010 |
| 7843814 | Mechanism and method for non-service affecting APS protection for MLPPP bundles on routing systems A method of non-service affecting APS protection for MLPPP bundles on routing systems, and associated mechanism, including one or more of the following: specifying a working MLPPP bundle and a protection MLPPP bundle; specifying MLPPP parameters; associating the wor... | 11/30/2010 |
| 7835272 | Backhaul path diversity for wireless networks A method and apparatus for switching backhaul communication links is disclosed. The method comprises monitoring communication traffic flowing across a primary backhaul communication link. When a problem is detected with the primary backhaul communication link, the t... | 11/16/2010 |
| 7826348 | Multicast fast reroute A method and apparatus for fast reroute of multicast data are disclosed. In one embodiment, a method includes transmitting a multicast join message from a receiver towards a source on a primary path and transmitting an alternate multicast join message from the recei... | 11/02/2010 |
| 7817542 | Method and network device for fast service convergence A method and network device for fast service convergence, used for communications between Autonomous Systems, includes: presetting a route forwarding table, each forwarding table item in the forwarding table includes information of a preferred route and a secondly-p... | 10/19/2010 |
