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7623479 |
Process control system devices with dual hardwired and wireless communication ports
Field devices or other devices within a process control system are provided with both hardwired and wireless communication ports to enable communications to be performed within the process control...
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7616561 |
Systems and methods for routing data in a communications network
A network device includes a group of interfaces. Each interface is associated with at least one other interface of the group of interfaces and a group of network addresses. Each interface is...
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7616560 |
Bus system consisting of at least two data buses
A bus system includes at least two data buses, the first data bus having a first number of users and the second data bus having a second number of users. At least two TTCAN buses, which are...
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7610405 |
Router software upgrade employing redundant processors
Systems and methods for replacing software controlling active routers while minimizing impact on network operation are provided by virtue of one embodiment of the present invention. The software...
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7609660 |
Wireless transceiver pair disposed within a process control system
A pair of wireless transceivers is disposed within a process control system to enable wireless communications between multiple devices within the process control system, such as between field...
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7609620 |
Method and apparatus using multiprotocol label switching (MPLS) label distribution protocol (LDP) to establish label switching paths (LSPS) for directed forwarding
A method and apparatus method for providing fast rerouting in a network is presented. The method and apparatus assign a first local label for a prefix, and assign a second local label for the...
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7609619 |
Active-active data center using RHI, BGP, and IGP anycast for disaster recovery and load distribution
A distributed data center topology having at least a pair of active data centers that can recover from a disaster at one of the data centers and achieves load balancing using IGP (Interior Gateway...
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7602741 |
Field device in a process control system using wireless radio communications to transmit and receive sense and control signals
An apparatus provides wireless communication between multiple devices within a process control system, such as between field devices, control units, user terminals, controllers, etc., using a...
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7602726 |
Method and system for optimizing link aggregation usage during failures
A method and system for optimizing link aggregation usage during failures is disclosed. The method and system are deployed in a network having a data plane in which data traffic flows between nodes...
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7602705 |
Dual-homing layer 2 switch
One embodiment relates to a method of providing dual-homing in a layer 2 switch. A determination is made as to whether a link is available to an upstream network on for a currently active port. If...
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7599772 |
Automotive switch fabric with improved resource reservation
A vehicle communication network ( 200 ) includes a plurality of network elements ( 208 - 212 ) and a plurality of communication links ( 214 - 230 ) communicatively coupling the network elements in...
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7599285 |
Combined electro-mechanical and solid state switching fabric
According to the present invention, methods and apparatus are provided to allow efficient switching of cable lines from failed line cards to protect line cards. Line cards may be arranged in...
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7595644 |
Power-over-ethernet isolation loss detector
An AC generator has a first terminal coupled through an Isolation Loss Detect (ILD) capacitor to the positive bus of a Power-Over-Ethernet (POE) system, and has a second terminal coupled through...
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7593323 |
Apparatus and methods for managing nodes on a fault tolerant network
Devices, systems and methods for managing communications traffic on a fault tolerant network are disclosed. The exemplary system may include a fault tolerant network with at least two nodes and at...
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7593322 |
Apparatus and method for optical communication protection
Protection techniques within optical communication networks are extremely important. An alternative to a line protection scheme, as most current optical communication networks use, is to utilize a...
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7593321 |
Method and system for a local and fast non-disruptive path switching in high speed packet switching networks
A method for operating a node in a computer network is disclosed, where the network is made up of nodes connected by links. The method has the steps: determining an alternate path for one or more...
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7593319 |
LAN switch with rapid fault recovery
One embodiment disclosed relates to a method of fault recovery by a switch in a local area network. A link failure is detected at a port of the switch. In response to the link failure detection, a...
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7590756 |
Method and system for transferring data in a communications network using redundant communication paths
A communication node of the present invention automatically transmits original and duplicate packets over different paths in a communications network to improve delivery reliability of the packet...
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7590054 |
Protection switching in an ethernet packet-switched network
Protection switching in an Ethernet packet-switched network includes establishing first and second virtual circuits. The first virtual circuit carries packet traffic associated with a different...
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7590053 |
Multiple endpoint protection using SPVCs
A system and method are provided for a multi-endpoint SPVC, the multi-endpoint SPVC providing redundancy. A primary SPVC is established through a first source node. An intermate communication...
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7590049 |
System and method for configuring a network element to support protection switching in an optical network
A system and method for configuring a network element to support protection switching in an optical network are described. The network element can operate according to the SONET, SDH, or both...
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7583593 |
System and methods for detecting network failure
A path verification protocol (PVP) which enumerates a series of messages sent to a set of nodes, or routers, along a suspected path identifies forwarding plane problems for effecting changes at the...
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7577089 |
Methods and apparatus for fast ETHERNET link switchover in the event of a link failure
An apparatus for fast failure switch over in an ETHERNET switch includes redundant switch (trunk) ports (a main and a backup) and hardware and software logic for redirecting traffic to the backup...
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7573813 |
Method for configuring and routing data within a wireless multihop network and a wireless network for implementing the same
A method routes packets in a wireless network which includes a control node and a multiplicity of individual nodes. The method includes: inserting a routing logical address into each packet which...
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7564845 |
Method for permanent redundant transmission of data messages in communication systems
The method carrying out permanent redundant transmission of data messages in disjunctive paths, such that circulating data messages can be reliably identified and destroyed. The method includes...
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7564778 |
Method of and control node for detecting failure
A method of detecting a failure in a network, which includes a transport plane comprised of a plurality of communication nodes performing optical cross-connect and a control plane comprised of a...
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7561795 |
Dynamic interlayer protection in optical telecommunication networks
The present invention relates to a method for protecting an optical telecommunication network against possible failures and signal degrades, the network comprising at least two nodes; working...
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7554905 |
Method and apparatus for routing a virtual concatenation group in a network
A network control entity that has an input for receiving data indicative of an event associated with a first member of a virtual concatenation group transported through the network. The network...
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7551553 |
Method and apparatus for restoring a network
A method and apparatus for restoring communications in a network. The network includes a plurality of nodes, with each pair of nodes connected by a link, and with each link having information...
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7548510 |
Method of constituting and protecting control channel in IP-based network and status transition method therefor
Provided is a method of constituting a highly reliable control network in an IP-based network environment and, more particularly, a protocol technology for automatic control channel constitution...
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7542414 |
Computing a diverse path while providing optimal usage of line protected links
Methods and apparatus for enabling line-protected links to be included in path-protected segments of a unidirectional path-switched ring are disclosed. According to one aspect of the present...
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7542412 |
Self-routing, star-coupler-based communication network
A self-routing communication network ( 100 ) having: a plurality of nodes (N 1 -N 15 ); a plurality of star couplers (S 1 -S 4 ) each having a plurality of inputs and a plurality of outputs; and...
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7539494 |
Inter-site call routing and roaming support
A method ( 600,700 ) and apparatus ( 800 ) are arranged and operate for facilitating call routing between sites in an enterprise connected by a private IP network ( 130 ). A range of identifiers (...
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7539131 |
Nexthop fast rerouter for IP and MPLS
Methods and apparatus for rerouting network traffic are described herein. In one embodiment, an example of process includes maintaining as a part of a routing table of a network element information...
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7535831 |
Method and apparatus for providing grades of service for unprotected traffic in an optical network
A method for providing grades of service to unprotected traffic on an optical network that provides protection channels associated with working channels, defines a linearly ordered set of...
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7535829 |
Tunnel reroute
In a tunnel connecting a source node to a destination node, data transfer for the tunnel is enabled through a first path. The data transfer is enabled by reserving resources in intermediate nodes...
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7532571 |
Providing online connectivity across a range of electronic communications systems
Methods and systems allow an application capable of online communication to monitor the availability of different electronic communications sources and provide transition between online and offline...
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7532569 |
Reflector communications channel for automatic protection switching
An apparatus and method for a communications network including at least one interface circuit reads frame data received from the communications network and writes frame data to be transmitted over...
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7532568 |
Geographic redundancy for call servers in a cellular system based on a bearer-independent core network
In a bearer-independent core network, the switching and transport of the bearer streams is separated from the processing of call sessions that control the bearer streams. The switching and...
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7526001 |
Statistical multiplexer having protective features from extraneous messages generated by redundant system elements
A statistical multiplexer includes a plurality of primary encoders 120 and at least one backup encoder 130 which is activated a primary encoder fails. The statistical multiplexer also includes...
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7525905 |
Method for the protection of the connection between a transport network hub and a central site/pop
The present invention provides for a method for Enhanced Equipment Protection Switch for Customer's device Dual-Homing, in an interconnection between a Central site/Pop and a Transport Network Hub...
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7525904 |
Redundant packet routing and switching device and method
A router and method therefore for routing and switching a packet from an incoming link to an outgoing link. The router may include a plurality of network processing units, a plurality of switching...
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7522532 |
Layer 2/layer 3 interworking via physical loopback
A layer three enabled layer two network includes a multi service platform. The platform includes a layer two switching component and a layer three switching component and has a physical loopback...
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7522517 |
Communication system with multipoint circuit bonding
A communication system comprises: a first circuit bonding device, a second circuit bonding device, a third circuit bonding device, first bonded circuits coupling the first circuit bonding system...
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7519712 |
Switching of PVC connection
The invention provides a PVC switching control method for an ATM communication network which allows high speed changeover of a connection upon occurrence of/release from a trouble and is superior...
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7519079 |
Generic routing encapsulation over point-to-point protocol
A system and method are described herein that are capable of reducing overhead while keeping the traffic separation characteristics between two routers by establishing and using a generic routing...
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7518991 |
System and method for troubleshooting broadband connections
A method for troubleshooting broadband connections, e.g., a digital subscriber line (DSL) connections, includes detecting a problem with the broadband connection at an end device. Then, a...
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7518990 |
Route determination method and apparatus for virtually-concatenated data traffic
Virtually-concatenated data traffic is routed in a network comprising at least first and second nodes. The first and second nodes may comprise a source-sink node pair, an ingress-egress node pair,...
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7518987 |
Mechanisms for providing connectivity in NAT redundant/fail-over scenarios in unshared address-space
Disclosed are methods and apparatus for facilitating reliable session based communication with a local host via a subnet of redundant network devices that also implement network address translation...
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7508754 |
Method and system to support internal calling upon loss of connection with IP Centrex server
A method and system for facilitating calling within an enterprise network upon failure of a landline connection between the enterprise network and an outside call server such as an IP Centrex...
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