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7630294 |
Method and communication arrangement for alternately operating a terminal at at least two communication nodes
For alternate operation of a terminal (EG 1 ) at at least two communication nodes (GK 1 , GK 2 ), the terminal (EG 1 ) is first registered with a first of the communication nodes (GK 1 ). In this...
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7620712 |
Availability measurement in networks
Mechanisms for measuring network availability are described. A first network element produces a first knowledge digest encoding the first set of forwarding policy indicators associated with a set...
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7613392 |
1:N protection in an optical terminal
A communication network comprising at least one first terminal, at least one second terminal, a plurality of links, and at least first and second nodes. The first node is bidirectionally coupled to...
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7609621 |
Automatic protection network switching
A method of protecting a protected link is disclosed. The method includes connecting traffic from a service module to a first physical module having a link layer framer that is connected to a...
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7593324 |
Graceful port shutdown protocol for fibre channel interfaces
A port shutdown protocol coordinates among various components involved in the process of administratively bringing down a link at both ends of a link connecting two switches. Execution of the...
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7570583 |
Extending SONET/SDH automatic protection switching
The invention provides a method and system for coupling a SONET/SDH network to a routing network that does not have a single point of failure. Multiple routers are coupled between the SONET/SDH...
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7545737 |
Method for automatically managing a virtual output queuing system
A method for automatically managing a virtual output queuing system in a switching fabric. The method includes detecting if a link is one of a non-operational-link and an operational-link. The link...
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7545736 |
Restoration path calculation in mesh networks
A method for determining a restoration path corresponding to a primary path for a new service in a mesh network involves (1) generating path costs for candidate restoration paths for the new...
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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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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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7535830 |
Dynamic cable assignment on gigabit infrastructure
A method and corresponding network interface device for communicating between devices connected to a LAN includes attempting to communicate between the network devices over an initial subset of the...
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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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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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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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7515532 |
Method, system, and storage medium for preventing duplication and loss of exchanges, sequences, and frames
A sequence identification number is added to a header in each Generic Framing Procedure (GFP) frame. The byte sequence identification number identifies frames, preventing duplication or loss of...
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7512064 |
Avoiding micro-loop upon failure of fast reroute protected links
A technique incorporates an efficient means for avoiding micro-loops on a backup path associated with a failed protected link. An intermediate node delays updating a forwarding database (FDB)...
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7505819 |
Redundant fieldbus system
A redundant fieldbus redundant system includes two independent conditioned power modules which automatically detect cable faults, such as short or open circuits on both the host and field sides of...
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7502314 |
Label-switched path network with alternate routing control
In a label-switched path communications network, each node of the network defines first and second label-switched paths between its first and second output ports and the input ports of downstream...
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7489627 |
Telecommunication network and upgrading method therefore
For upgrading a section of a telecommunication network comprising two nodes, one of the data lines interconnecting the nodes is selected to be a carrier of redundant specimens of information units...
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7490165 |
Method and apparatus for computing a path in a system with nodal and link diverse constraints
Methods and apparatus for defining an alternate circuit path within a network are described. According to one aspect of the present invention, a device for computing circuit paths between a first...
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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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7457537 |
Optical telecommunication system with automatic channel switching
An optical telecommunication system with automatic channel switching is disclosed. The system is provided with two symmetrical fiber channels and two subsystems. Each subsystem is formed by two...
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7450516 |
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...
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7451340 |
Connection set-up extension for restoration path establishment in mesh networks
An extension to a connection setup protocol for establishment of a restoration path for a service in a mesh network involves, at a transit node along the restoration path, the steps of (1)...
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7443843 |
Terminal relay device and relay method
An apparatus has a cross connection circuit, first switching sections located on the input side of the cross connection circuit to switch a presently-used transmission path and a reserve...
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7428214 |
Methods and devices for high network availability
Methods and devices are provided for simulating a direct failure between a network device and an end device. In some implementations, the network device is a gateway of a first network and the end...
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7406038 |
System and method for expansion of computer network switching system without disruption thereof
A switch fabric system comprises a first chassis for receiving a plurality of line cards each having a plurality of ports and at least two switch fabric cards wherein each line card comprises a...
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7403474 |
Redundant router set up
Methods, systems, and devices are provided for redundant router set up. One embodiment of a network device having router functionality includes a processor, memory in communication with the...
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7397761 |
Routing restorable service-level-guaranteed connections using maximum 2-route flows
A packet network employs restorable routing with service level guarantees. Restorable routing generates two disjoint paths through a network of nodes interconnected by links for a connection...
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7394761 |
System and method for delivering messages using alternate modes of communication
There is provided a novel system and method for delivering messages using alternate modes of communication when a primary mode of communication is not available as may happen in emergent...
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7382723 |
Hitless switching system and transmission apparatus
A hitless switching system includes a sending apparatus and a receiving apparatus. The sending apparatus includes: a distributing part for dividing an original signal into a plurality of signals;...
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7372807 |
Method and apparatus for multiplex transmission
In a transmission network including multiplex transmission units A, F, G, D and E, when the line breakage has occurred on the OC-12 transmission path of the direction from unit A to unit F, the...
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7372870 |
Ethernet transmission apparatus with a quick protective and fair attribute and its method
An Ethernet transmission apparatus having a quick protection and fair attribute as well as a corresponding method are disclosed. The apparatus comprises a sorter, MPLS processing module and a SDH...
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7369977 |
System and method for modeling timeouts in discrete event execution
A system and method models regional timeout functionality in a discrete event execution environment. A timeout function is initiated associated with an entity upon occurrence of a start condition...
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7345992 |
System and method for embedding a sub-channel in a block coded data stream
The present invention relates in general to a method, apparatus, and article of manufacture for providing high-speed digital communications through a communications channel. In one aspect, the...
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7343170 |
System and method for allowing nodes in a wireless communication network to access multiple channels
A method for allowing a node in a wireless communication network to access time slot assignment information on multiple channels includes assigning the node to a first channel associated with a...
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7340505 |
Content storage and replication in a managed internet content storage environment
A method for content storage on behalf of participating content providers begins by having a given content provider identify content for storage. The content provider then uploads the content to a...
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7319700 |
Communicating constraint information for determining a path subject to such constraints
Path determination constraints may be encoded in the form of a program having one or more instructions. Each of instructions may include an operation code, and operands (or pointers to locations...
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7315511 |
Transmitter, SONET/SDH transmitter, and transmission system
Disclosed herein is a SONET/SDH transmitter provided in a transmission system in which a SONET/SDH network and an IP network are connected with optical LAN-IF. The SONET/SDH transmitter has a...
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7301896 |
Redundant changeover apparatus
A redundant changeover apparatus causing no frame synchronization loss even upon occurrence of changeover between working system and protection system. In case of an in-apparatus synchronization...
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7298693 |
Reverse notification tree for data networks
Recovery time upon the failure of a link or switching system in an asynchronous data network can be minimized if downstream data switches provide upstream messages indicating to upstream switching...
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7287081 |
Controlled calls in a transmission network
Commands are shown and described that enable a user to manipulate a call connection for the purpose of maintaining links in a network. The Block command prevents new traffic from being added to an...
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7283462 |
Multiple bundle identification for calculation of a network protect path
Consistent with a feature of the present invention, protection and working routes are determined by assigning administrative weight values to each route in a network. The administrative weight...
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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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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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7280472 |
Protection switching at a network node
Protection switching between primary and secondary paths in a packet-based network involves table entries that are pre-programmed with a primary path, a secondary path, and a value that identifies...
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7274658 |
Optimal route selection in a content delivery network
A routing mechanism, service or system operable in a distributed networking environment. One preferred environment is a content delivery network (CDN) wherein the present invention provides...
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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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