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6530032 |
Network fault recovery method and apparatus
The present invention provides layer one, two and three (L 1 /L 2 /L 3 ) Integration and L 1 cut-through path utilization in an apparatus and method of fault recovery. A switch combines an IP...
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6513092 |
1:N protection switching architecture for common processing units
A system for providing 1:n protection for common processing units in a star bus architecture multiplexer or switching system and providing one redundant protection common processing unit to protect...
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6499061 |
Method and system for assigning labels to data flows over a packet switched network
Method and system for assigning labels in a data transmission network in which flows of data, composed of packets, are transmitted from a source node to a destination node through a plurality of...
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6498779 |
Multiple endpoint paths
A multiple endpoint path for providing endpoint redundancy is described. Selected active end nodes in a digital communications network are configured by a network management system to have...
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6496811 |
Fuzzy-logic based overload detection and correction for packet gateways
A fuzzy-logic based overload control for packet switches wherein a distribution curve is developed regarding the overload possibility versus receive packet stream processing rate. The transmit...
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6473397 |
Add/drop multiplexer and method, and Bi-directional line switcher ring featuring such multiplexers
An improved add/drop multiplexer in which groups of working channel tributaries have associated groups of protection channel tributaries is provided. Traffic is added by receiving it from an...
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6466574 |
Quality of service improvement of internet real-time media transmission by transmitting redundant voice/media frames
Improved reliability and reduced delays and packet losses of Internet media transmissions over packet switching networks such as Internet and Intranet is achieved by replicating a sent...
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6463032 |
Network switching system having overflow bypass in internal rules checker
A novel method of overflow data handling in a multiport data switching system having a decision making engine for controlling data forwarding between receive ports and at least one transmit port....
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6442131 |
Selective VP protection method in ATM network
A selective VP protection method in an ATM network for protecting a virtual path connection selectively employing VP end protection and arbitrary VP protection is proposed. In the method, the...
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6442132 |
High availability ATM virtual connections
A method of establishing and maintaining a connection through an asynchronous cell-based network having a plurality of switching nodes, comprises setting up a first bi-directional path between...
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6438100 |
Method and apparatus for routing server redundancy in a network having carrier scale internetworking
A method and apparatus provides greater flexibility, scalability and manageability when multiple services are being supported by a Carrier Scale Internetworking (CSI) system by including processing...
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6430150 |
Communication node, restoration method and communication network
In a telecommunication network, each node is provided with the same physical topology information relating to a physical construction of telecommunication paths included in the telecommunication...
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6400996 |
Adaptive pattern recognition based control system and method
An adaptive interface for a programmable system, for predicting a desired user function, based on user history, as well as machine internal status and context. The apparatus receives an input from...
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6392990 |
Method for implementing interface redundancy in a computer network
A method and system for recovering transparently from a network interface failure. The method is to be run in a computing device on a network with multiple peer computing devices, having redundant...
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6381218 |
Network controller system that uses directed heartbeat packets
A network controller system including a plurality of network ports and a driver system that operates the network ports as a team. The team is operated to simulate a single logical device in one of...
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6370112 |
Seamless path switchover in a connection-oriented packet network
In a connection-oriented packet switching network, different paths through the network from one point to another are likely to have different delay. The invention is a method and network...
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6353593 |
Protection architecture for virtual channel connections (VCCS) in a telecommunications network
A method for protecting virtual channel connection (VCC) traffic in a telecommunications system includes receiving a virtual path connection (VPC) at a destination node. The virtual path connection...
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6353594 |
Semi-permanent virtual paths for carrying virtual channels
A semi-permanent virtual path circuit (SPVPC) is used in a dedicated-connection switching digital network for routing and maintaining data flow between network edge nodes. A two level connection...
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6343067 |
Method and apparatus for failure and recovery in a computer network
A method for transmitting data in a network from a source node to a destination node via a path of links includes the steps of transmitting data packets from the source node to an intermediary...
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6337848 |
Path switching device for transmission apparatus
Two alarm detecting units required as alarm detecting units for controlling a PSW in order to implement a PSR function, are deleted, and instead the result of an alarm detection output by a...
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6327243 |
System and method for performing a seamless switchover from a primary packet router to a secondary packet router
There is disclosed a redundant switch comprising a primary controller capable of routing data packets from an input interface to an output interface and a secondary controller capable of performing...
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6308281 |
Virtual client to gateway connection over multiple physical connections
A method, system, and computer program by which a logical network connection can be maintained in the presence of disruption or failure of the underlying physical network connection. The technique...
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6307834 |
Redundant transmission system with disconnection of a transmission path exhibiting faulty transmission behavior
In a transmission system in which redundant message cells are forwarded via redundant transmission paths according to the Asynchronous Transfer Mode, a transmission path is blocked after the...
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6278687 |
MA alternate routeing
In a Synchronous Digital Hierarchy (SDH) based communications network comprising a plurality of Intermediate Systems (IS), the IS being divided between at least one IS--IS Area and at least one...
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6269076 |
Method of resolving split virtual LANs utilizing a network management system
A method for creating and resolving split VLANs in ATM networks. The method utilizes a Network Management System (NMS) and a standard management protocol such as SNMP. The method monitors the...
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6269077 |
ATM link switching over method and apparatus
A system switching over method and apparatus for duplicated ATM (asynchronous transfer mode) switch, which enables keeping the delay quality of each cell unchanged without any cell loss, are...
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6252891 |
System and method to insert timestamp information in a protocol neutral manner
A method and apparatus for inserting sequence number and timestamp information into a network data packet in a manner which is checksum neutral with respect to a checksum precalculated in the...
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6246665 |
Method for attending occurrence of failure in an exchange system that exchanges cells having fixed-length, and interface unit and concentrator equipped in the exchange system using the method
An ATM exchange system which handles fixed-length cells, such as an ATM exchange, is designed in such a manner that even when a failure occurs particularly in an interface unit or an ATM switch...
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6243844 |
Signal transmitter used in the transmission of data in a communication system
A signal used in the transmission of data in a communication system including immediately successive cells for the purpose of cell synchronization, includes filler cells containing a predefined bit...
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6229787 |
Mechanism to achieve very fast failover in ATM backbone networks using multi-homed circuits
A first end-to-end connection between a source node and a destination node is established. The first end-to-end connection may include a number of point-to-point links between a number of...
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6226297 |
Method and system for providing redundancy to asynchronous transfer mode emulated local-area networks
A method for providing redundancy to an Asynchronous Transfer Mode (ATM) emulated local-area network (LAN) is disclosed. The ATM emulated LAN is served by a primary LAN Emulation Server, a...
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6222820 |
Method of VCC/VPC redundancy for asynchronous transfer mode networks
A method of selectively providing redundancy on a dynamic basis to end users that request it. The method establishes both a primary and a redundant connection for each connection requested to be...
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6185192 |
Process for fetching out error statistics data
For implementing the method for reading error statistics data, a hardware configuration has processing units (CTR0, CTR1) that operated in microsynchronous parallel operation for the processing of...
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6185215 |
Combined router, ATM, WAN and/or LAN switch (CRAWLS) cut through and method of use
A cut through is provided in a combined router/switch in a data processing system network by having the router store and forward a first portion of a data flow from a source to a destination. The...
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6181675 |
Uninterrupted switching between active and backup systems in ATM communication apparatus
A reception device in the ATM communication apparatus has a format conversion buffer, an underflow detecting circuit, and an in-device empty cell insertion control circuit in each of the active and...
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6154448 |
Next hop loopback
In a telecommunications network, broken connections can be detected and located through a next hop loopback technique. The next hop loopback technique involves the generation, transmission, and...
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6141319 |
Link based alternative routing scheme for network restoration under failure
Alternative routing schemes in high-speed networks ensure fault tolerance in the event of a link failure. An heuristic algorithm, based on maximal-flow algorithm, is first used to partition the...
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6134671 |
System and method for dynamically generating restoration routes within a communications network
A system and method is disclosed for dynamically restoring communications within a network following an outage comprising a database containing the configuration of switching elements within the...
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6122753 |
Fault recovery system and transmission path autonomic switching system
Setting of a bypass path upon occurrence of transmission failure, is applicable for large scale network. A system includes signaling means which makes judgment whether bypassing process is...
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6112241 |
Integrated network interconnecting device and probe
A Local Area Network (LAN) Switch includes conventional switching functions and integrated Remote Monitoring (RMON) Universal Feature Card (UFC). The UFC allows simultaneously statistically...
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6098188 |
Packet framer
A packet of information is encapsulated into a frame and the frame is segmented into one or more cells for transmission over a communications network. One of the cells contains a...
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6091731 |
Duplication in asychronous transfer mode (ATM) network fabrics
Arrangements for controlling a data switching network fabric and for synchronizing duplicate modules of such a fabric. A control complex, for determining new virtual connections to be established,...
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6073164 |
Method and article of manufacture for communication to telecommunications switches, such as IPX switches
A method, system, and article of manufacture for communicating to or querying telecommunication switches in a telecommunications network first gathers relevant information from a technician. Such...
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6067286 |
Data network switch with fault tolerance
An ATM data network switch having two separate but simultaneously active switch fabrics and a plurality of slot controllers is disclosed. Each slot controller has at least one external data link...
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6041037 |
ATM virtual path switching node
In an ATM virtual path switching node, upon being notified of a current virtual path by a virtual path monitoring unit, a link fault determination unit compares the number of faulty current virtual...
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5963540 |
Router pooling in a network flowswitch
A router fault tolerant network interface system includes a switch circuit configured to detect when a router fails in a multi-router local network. When a failed router is detected, the switch...
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5953312 |
Method and apparatus for determining alternate routes in a network using a connection-oriented protocol
A system for selecting an alternate route in a network using a connection-oriented protocol. The system is implemented in response to inadequate resources to a normal next hop node for a requested...
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5949759 |
Fault correlation system and method in packet switching networks
In case of a failure in a high speed packet switching network, the failure information provided by the multiplicity of resources is registered in the access nodes of the network. The failure...
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5940367 |
Fault-tolerant butterfly switch
The present invention allows a data packet to reach its destination by automatically routing the data packet around failed components by means of a simple and efficient routing algorithms. The...
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5933590 |
Restoration of multiple span cuts with priority hand-off using SHN
A system and method for restoring communications in a network having multiple span failures. After a failure is detected, a sender node in each of the plurality of sender-chooser pairs sends a...
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