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6918063 |
System and method for fault tolerance in multi-node system
A method and system for promoting fault tolerance in a multi-node computing system that provides deadlock-free message routing in the presence of node and/or link faults using only two rounds and,...
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6914877 |
System for alerting a network of changes in operational status of communication links
A system for informing nodes in a network of the operational status of links. Each node examines the links connected to it. When a change in status is detected, the node records the change, and...
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6909605 |
Optical communication boards including power control function and system having the boards
According to one aspect of the present invention, the present invention provides an optical communication system, including: racks mounting many optical communication boards having optical modules...
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6904013 |
Error handling within power amplifier modules in wireless base-station
CDMA base-station comprising a transmit stage ( 2, 4, 7, 9, 10, 11, 12 ) and a receive stage ( 3, 5, 8, 13 ) for communicating with mobile terminals has been provided. The transmit stage comprises...
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6898189 |
Restartable spanning tree for high availability network systems
A method and apparatus for continuing the operation of a spanning tree protocol at a network device despite crashes or failures at that device. A supervisor card contained in the network device is...
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6895528 |
Method and apparatus for imparting fault tolerance in a switch or the like
A method and apparatus for imparting fault tolerance in a switch or the like, particularly in a fibre channel director switch employed in connection with storage area network.
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6894969 |
Apparatus and method for redundancy of processing modules interfaced to a switching core
The present invention is a core interface mechanism that permits 1:N type port protection on the core side of the switch such that core bandwidth is not wasted by the direct connection of service...
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6891793 |
Network system
When an edge node whose order is lower than that of a primary switch detects a failure of the primary switch, the edge node requests a secondary switch that the secondary switch serves as a host of...
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6885634 |
Network protocol having staggered recovery
A network utilizing a link-state protocol includes a plurality of nodes with associated trunks that recover in a staggered manner. A first trunk associated with a first node is selected for...
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6885633 |
Network node and a system
The invention is related to structures used for providing fault tolerance in computer data networks. According to the invention, fault tolerance is achieved by redundancy, i.e. by using at least...
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6882620 |
Token exchange system with fault protection
According to one embodiment, a system for controlling passing of a token among a plurality of clients that access a shared resource includes at least one controller. The at least one controller is...
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6882621 |
Method for equivalently connecting subassemblies in 1:N redundancy
In the Prior Art, a higher-ranking mechanism controls the standby circuiting of assemblies in 1:N redundancy, resulting in a system dynamics loss. The invention solves this problem in that the...
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6882653 |
Gateway system having controller and signal processor for interconnecting IP network and telephone network and method for controlling alternative routing at the time of fault of gateway system
To detect network faults or congestion of traffic at an interface of a gateway system for connecting an IP network and a telephone network on the side of the IP network and to allow the IP network...
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6877104 |
Wireless local area network system, fault recovery method, and recording medium stored therein a computer program executing the fault recovery process
The present invention provides a wireless local area network (LAN) system preventing throughput from being decreased even when a fault occurs in an access point, a fault recovery method, and a...
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6870814 |
Link extenders with error propagation and reporting
A link extender node is used to extend links between end nodes and/or routing nodes in a system area network. A connection includes a first link, coupling an end or routing node to a local port of...
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6862263 |
Hierarchical telecommunications network with fault recovery
The present invention is a telecommunications network having a hierarchical architecture which reduces the amount of equipment and processing required to recover from network failures. In an...
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6856600 |
Method and apparatus for isolating faults in a switching matrix
A signal router is described. The signal router includes a switching matrix, an error detector and a controller. The switching matrix includes a first number of inputs and a second number of...
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6850704 |
Low-overhead fault-tolerance techniques for optical and other cross-connect systems
Fault tolerance is provided in a cross-connect system having only duplicated switch fabrics, instead of the triplicated switch fabrics of the prior art. In addition to the two information switch...
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6850482 |
System and method for data traffic redirection
A system and method for intelligently redirecting data traffic from a Public Switched Telephone Network (PSTN) to a data network. The system can include: an intelligent communications platform...
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6839829 |
Routing protocol based redundancy design for shared-access networks
A protection CMTS is available to immediately service a cable modem should that modem's service from a working CMTS fail for any reason. To speed the service transfer (cutover) from the working...
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6839515 |
Method for establishing a communication on a standby link in optical transmission facilities
A method for standby switching in optical transmission devices is provided, wherein, in addition to a working signal and a protection signal, respective control signals with information concerning...
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6834038 |
Protection against master unit failure in remote network access multiplexing
Network access apparatus includes a slave unit, including a plurality of subscriber ports adapted to be linked to respective subscriber lines, and a multiplexer for multiplexing among the ports. A...
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6813239 |
Dual transmission spread processing circuit system for CDMA communication apparatus
A CDMA communication apparatus includes a system of dual transmission spread processing circuits wherein switching control of one of the transmission spread processing circuits from an operating...
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6807148 |
Demand data distribution system
A demand data distribution system architecture applicable to data distribution systems and entertainment systems is disclosed. The demand distribution system architecture includes data sources and...
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6795393 |
Method and apparatus for errorless path protection and rearrangement
An apparatus and a method for cross connect matrices includes originating, center and terminating stages in both a main portion and a back-up portion that allows center stages to be switched...
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6791939 |
Dynamic generation of deadlock-free routings
In accordance with methods and systems consistent with the present invention, an improved failure recovery system is provided that, upon detecting a failure, generates new routings for the network...
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6781952 |
Establishment of designated S-PVC connection in PNNI operation ATM switching apparatus network
For establishing an S-PVC (soft private virtual connection) connection in a PNNI (private network-network interface) network of a plurality of peer groups, each of which includes at least an ATM...
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6778491 |
Method and system for providing redundancy for signaling link modules in a telecommunication system
In particular embodiments, the present invention provides a system for managing signaling messages in a telecommunication system. The system includes a first control module that is operable to...
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6778490 |
Method and apparatus for a fault tolerant router architecture
A method, apparatus and article of manufacture for routing a data packet in a fault tolerant manner. A data packet is received from an incoming data channel and is transferred to a switching engine...
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6778489 |
Subscriber terminating equipment
The invention provides a subscriber terminating equipment wherein a subscriber accommodated in a subscriber terminating package with which a fault occurs is switched to a relief package by...
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6775228 |
ATM network element and method for automatic protection switching of a transmission convergencence sublayer subnetwork connection
The invention relates to a method and an ATM Network Element (ATM NE- 1 ) for automatic protection switching of a Transmission Convergence Sublayer SubNetwork Connection TCS SNC. In order to...
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6765862 |
Telecommunication switch, and switching telecommunication signals
The invention relates to an ATM telecommunication switch for switching telecommunication connections, said telecommunication switch comprising incoming lines, outgoing lines, and a switching field...
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6760859 |
Fault tolerant local area network connectivity
Method, program product, and apparatus for providing a nondisruptive takeover by a backup adapter when an adapter from a group of adapters connecting a data processing system to a Local Area...
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6757242 |
System and multi-thread method to manage a fault tolerant computer switching cluster using a spanning tree
A system, method and computer program to detect and recover from a communications failure in a computer network. The computer network has several nodes which include processor-based systems,...
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6757725 |
Sharing an ethernet NIC between two sub-systems
A management sub-system is associated with a host computer system. The host system includes a network interface controller to facilitate transmissions between the host system and a distributed...
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6754173 |
Trunk arrangement in a computer network with intra trunk switch connections
A trunk switch of a trunk cluster for connecting a plurality of edge devices to each other, where each edge device can communicate with all the other edge devices through all of the trunk switches....
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6754220 |
System and method for dynamically assigning routers to hosts through a mediator
A method and system are disclosed for dynamically assigning, on a Local Area Network, through a mediator, a plurality of active routers to a plurality of hosts so as to handle hosts data packets...
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6754172 |
Non-interruptive protection switching device and network system using the same
A non-interruptive protection switching device which performs protection switching in a more efficient and robust way. The device has a working-channel signal storage unit to store data signals...
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6744779 |
Data processing system
The data processing system includes I/O units for transmitting and receiving data, control units for processing the data, and a common bus unit including a common bus. Function cards in each unit...
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6744727 |
Apparatus and method for spare capacity allocation
A method is given for deriving a backup path routing spare capacity template that is feasible, scalable, adaptive, much faster, and near global optimal in redundancy reduction. The method includes...
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6744726 |
PVC management system and method
A PVC management system in each of ATM switches is disclosed. Each of the ATM switches includes a pair of an incoming header translator and an outgoing header translator, which are provided for...
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6738345 |
Method for failover management in a synchronous optical network using standard protocols
In synchronous optical communications network, a communications node (FIG. 1, 10 ) is in communications with a second communications node ( 12 ) and desires to fail all traffic over from a working...
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6735168 |
Method and architecture for providing telephony between data networks and PSTN
A method consistent with the present invention enables communicating telephonic data regarding a call over a data network. The method includes the steps of receiving data units from a first data...
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6731596 |
Network switch having system for automatically detecting change in network node connection
A novel system and method of automatically detecting a change in network node connection in a multiport data switching system having receive ports for receiving data packets from network nodes, and...
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6728205 |
Method and apparatus for automatic protection switching
A Bi-directional Link Self-healing Network (BLSN) for implementing bi-directional link automatic protection switching (APS) for an arbitrary edge or node redundant network and a technique for...
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6728207 |
Self-healing ring network and a method for fault detection and rectifying
The present invention relates to a self-healing ring network and a method for fault handling in said network. Said network comprises two communication paths ( 1, 2 ) and at least two nodes (N 1 , N...
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6728535 |
Fail-over of forward link equipment
A communications system and method for transmitting data to a mobile platform is provided. The communications system comprises a forward link assignment manager in communication with a route server...
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6717909 |
Ethernet protection system providing fault tolerence for communication lines and interface cards according to classified failure states
An Ethernet protection system includes an Ethernet communication device operable to be connected to first and second Ethernet lines forming a parallel connection. The Ethernet communication device...
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6700868 |
Switching redundancy control
An apparatus and method for switching redundancy control which provides fast switching from a malfunctioning component to a redundant component with minimum data flow interruption for both...
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6697325 |
System, device, and method for expediting reconvergence in a communication network
In a system, device, and method for expediting reconvergence in a communication network, a first indication of a communication link failure prompts a node to compute new routes. Upon receiving the...
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