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7623446 |
MPLS virtual rings
A virtual ring representing a community of interest is constructed from an interconnected mesh of nodes in a packet network. The virtual ring instantiates ring labels in respective forwarding...
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7623445 |
Multiple ring support within a single network element
A network element receives frames from multiple ring networks. Each ring network linked to the network element is supported by a designated support program. The received frames are monitored for...
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7619987 |
Node device
In node devices composing a ring network connected to another network with a redundant node device, a topology table includes redundancy information of the redundant node device, a transmitter...
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7613108 |
Redundant supervisory control system, and redundancy switching method of the same
An object is to provide a redundant supervisory control system and a redundancy switching method thereof. In the redundant supervisory control system, remote I/O apparatuses are less likely to be...
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7609622 |
Communication system having enhanced reliability
A method for a system including a plurality of encoders each for receiving a first signal and encoding to generate a respective second signal for sending to a respective subscriber, comprising...
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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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7536477 |
Access mechanisms for efficient sharing in a network
One embodiment provides a computer-implemented method for processing data on a node. In this embodiment, the node first determines if a first transit buffer on the node is empty, wherein the first...
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7532570 |
Fault tolerant network traffic management
A system and apparatus for transmitting transit data through a network with first and a second rings coupling two or more nodes. In one aspect, when the first ring is intact and the second ring has...
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7529182 |
Communication device with 1:1 protection
A communication method for a network where a plurality of communication devices are interconnected and a plurality of pairs of working channels and backup channels are set in two paths between...
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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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7518989 |
Method and apparatus for recovery from faults in a loop network
A method and apparatus for recovery from faults in a loop network ( 500 ) is provided. The loop network ( 500 ) has a plurality of ports ( 520, 530, 532, 534 ) serially connected with means for...
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7515531 |
Apparatus and methods for the communication and fault management of data in a multipath data network
An apparatus and methods are provided for the communication of a data stream and management of faults in a multipath data network having a protected ring-in-ring network architecture. The data...
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7508768 |
Traffic measurement system and traffic analysis method thereof
A traffic measurement system and a traffic analysis method are provided. The traffic measurement system includes a plurality of measurement devices that collect all of packets flowing through...
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7489905 |
System for determining RF path loss between an RF source and an RF receiver with hysteresis and related methods
A test method is for determining RF path loss between an RF source and an RF receiver. The RF source may transmit RF power values at a relatively fine granularity, and the RF receiver may generate...
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7486613 |
Protection-switching apparatus and method in asynchronous transfer mode system with ring topology
The present invention discloses a protection-switching apparatus and method in an asynchronous transfer mode (ATM) system with ring topology. In the invention, the ONU detects a trouble, or...
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7477847 |
Optical and electrical channel feedback in optical transceiver module
Optical transceivers have loopback and pass-through paths for diagnosing transceiver components and optical networks connected to the optical transceiver or for routing data out of the transceiver...
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7460783 |
Method and apparatus for dynamic provisioning of reliable connections in the presence of multiple failures
Method and apparatus for dynamic provisioning of reliable connections in the presence of multiple failures in optical networks are described. One embodiment is a method for allocation of protection...
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7460471 |
System for motion control, method of using the system for motion control, and computer readable instructions for use with the system for motion control
A motion control system and method that includes a central controller configured to generate first and second demand control signals to be used to define actuation motion of respective first and...
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7450497 |
Shared mesh signaling method and apparatus
In a mesh network, a network element for providing protection switching in a 1:N shared mesh protection scheme having a first protection path associated with a pair of working paths selected from...
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7447432 |
Regulating radiation component power in wavelength division multiplexed optical communication systems
There is provided a method of, and apparatus for, regulating radiation component (wavelength channel) power in a wavelength division multiplexed (WDM) optical communications system ( 10 ). The...
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7447429 |
Bidirectional line switched ring network
A bidirectional line switched ring network which enables high-speed operation with improved reliability because of a reduced software processing load is disclosed, and the network includes a...
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7443788 |
Method and apparatus for improving performance of a loop network
A method and apparatus for improving performance of a loop network, in particular a Fiber Channel Arbitrated Loop. The loop network has two loops and a plurality of dual-ported devices each with...
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7433302 |
Ethernet network implementing redundancy using a single category 5 cable
A method for providing redundancy in a daisy chain local area network employing Category 5 cabling for connecting network devices uses the normally unused twisted wire pairs in the single Cat 5...
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7421203 |
Method for transmitting packet in wireless access network based on wavelength identification code scheme
A method for transmitting a packet in a wireless access network based on a wavelength identification code scheme. The method comprises the steps of connecting n number of RNCs (Radio Network...
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7394758 |
Method for supporting SDH/SONET APS on Ethernet
An Ethernet MAC APS Control sublayer is provided for supporting SDH/SONET APS standard functionality in Ethernet Networks. In accordance with one embodiment, an Ethernet MAC APS Control sublayer is...
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7372840 |
Filtering of dynamic flows
Methods and correspondent nodes to filter IP communications through firewalls in scenarios where dynamic pinholes are created to ensure an appropriate level of security is disclosed. The invention...
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7355978 |
Method for implementing an OAM function by exchanging request-reply packets between stations of a RPR network, and corresponding packet frames
Described is a method extending the OAM functionality in the RPR networks through a new OAM loopback procedure of request-reply type together with the definition of a new RPR OAM loopback frame....
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7342877 |
Method and system for providing a loop-free ring topology
A method for preventing loops in a ring topology of a computer network is disclosed. The method includes receiving a packet at a node on a shared packet ring and inserting a header containing an ID...
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7334070 |
Multi-channel memory architecture for daisy chained arrangements of nodes with bridging between memory channels
Multiple memory channels of a multi-channel memory architecture are effectively bridged together to enable data traffic associated with various nodes in daisy chain arrangement to be communicated...
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7317681 |
Redundancy for dual optical ring concentrator
A novel and useful mechanism for optical ring networks providing concentrator redundancy in the event of a failure of a concentrator. The nodes in a network are connected to dual concentrators to...
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7308612 |
Fast port failover in a network switch
A network switch comprises a plurality of ports that exchange frames of data with one or more network devices. A transfer circuit transfers the frames of the data between the ports. At least one of...
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7283740 |
Optical ring network with optical subnets and method
An optical network includes a plurality of subnets. The subnets each include a plurality of add/drop nodes coupled to the optical ring and operable to passively add and drop traffic to and from the...
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7283739 |
Multiple subnets in an optical ring network and method
An optical network includes an optical ring and at least three subnets. Each subnet includes a plurality of add/drop nodes coupled to the optical ring. The add/drop nodes are operable to passively...
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7263062 |
Transmission apparatus with a function to switch a line in the event of a transmission failure
A transmission apparatus to switch a line from a working line to a protection line in the event of a transmission-line failure on the working line. The transmission apparatus includes a classifying...
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7242860 |
Optical protection switching using 2 by 2 switching functions
A network is protected against interruption of service while one or more faulty switches or optical fiber transmission lines are repaired or replaced, by an interconnecting configuration of small...
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7184663 |
Optical ring network with hub node and method
An optical network includes an optical ring and a plurality of add/drop nodes coupled to the optical ring. Each of the add/drop nodes is operable to passively add and drop one or more traffic...
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7167445 |
Virtual line switched ring (VLSR) connection state distribution scheme
Systems and methods consistent with this invention allow for each node within one or more rings to obtain connection and topology information from other nodes within these rings. In such a system,...
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7151742 |
Flow control for communication ring access control
Ring access control circuitry comprises a receive interface, a host interface coupled to the receive interface, a mate interface coupled to the host interface, a flow control agent coupled to the...
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7142504 |
Fault tolerant network traffic management
A system and apparatus for transmitting transit data through a network with first and a second rings coupling two or more nodes. In one aspect, when the first ring is intact and the second ring has...
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7116638 |
Method for identifying mis-optioned data communications circuits
Methods for identifying a mis-optioned data communications circuit are provided. A test point is configured providing access to a data communications circuit for operation of a first data...
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7113699 |
Fault forwarding in an optical network
A system and method for forwarding fault information in an optical network is disclosed. Responsive to a fault being detected at a node, the fault information is forwarded to the destination node...
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7102995 |
Supporting SDH/SONET APS bridge selector functionality for ethernet
An Ethernet Automatic Protection Switching (APS) Bridge Selector is provided for supporting SDH/SONET APS standard functionality in Ethernet Networks. In accordance with one embodiment, an Ethernet...
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7082557 |
High speed serial interface test
A high speed, two-way serial interface with a scrambler and de-scrambler may be tested by sending a single word repeatedly through the scrambler to create a pseudo-random sequence. The...
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7065268 |
Link discovery and verification procedure using loopback
Systems and methods for link discovery and verification technique that minimize the need for line termination resources that generate and interpret packets. Of two nodes verifying a link to one...
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7054558 |
Method for traffic protection in WDM fiber optic transport networks
A method for the protection of fiber optic ring-shaped transport networks, the networks including network elements connected by spans, optical paths being installed between the network elements,...
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7042836 |
Transmitting apparatus
A transmitting apparatus for cross connecting and transmitting main signals which enter via ring-configured transmission lines to which working and protection channels have been assigned in first...
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7035203 |
Interconnection between telecommunication MS-SPRING and SNCP ring networks
A method is disclosed for interconnecting an MS-SP ring network and an SNCP ring network in a Dual Node and Bridge and Switch architecture through a primary interconnection node and a secondary...
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7020226 |
I/Q distortion compensation for the reception of OFDM signals
A transmitter ( 102 ) generates a first set of data symbols and a first pilot symbol ( 601 ) at a first time, and a second set of data symbols and a second pilot symbol ( 602 ) at a different,...
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7016947 |
Convenient configuration of an identifier of a segment of a virtual circuit
Configuring a segment identifier in a customer premise equipment (CPE) connected to a network. Several OAM loopback cells containing possible segment identifiers in the headers may be transmitted....
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7012887 |
Method for restoring diversely routed circuits
A method and apparatus for restoring a diversely routed circuit in a timely manner from an initial path failure includes the steps of receiving one or more triggers at one of a destination node and...
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