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7636298 |
Apparatus and method for packet error correction
A packet error correcting apparatus includes a retransmission request controlling unit controlling a timing of transmission of a retransmission request to a packet transmitting apparatus from a...
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7636388 |
Channel fault detection for channel diagnostic systems
A method and computer program product for detecting faults in cables. The invention comprises receiving a first reflected signal; comparing the first reflected signal amplified with a first...
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7633860 |
Method for fast rerouting
A method for fast rerouting, wherein, in a router, a fast rerouting flag and bypass path information is set for forward information corresponding to a label switch path of an incoming interface...
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7630292 |
Data relay apparatus and data relay method
A failure-recovery-information storing unit stores failure-recovery information in which a working path is associated with a backup path. A failure-occurrence-notification receiving unit receives a...
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7627026 |
Threshold setting using piecewise linear approximation for channel diagnostic systems
A method and apparatus for detecting faults in cables. The invention comprises computing a plurality of thresholds representing a corresponding plurality of values of reflections in the cable;...
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7627290 |
Route convergence monitoring system and method
A route convergence monitoring system and method provide for determining routing changes or affected devices that may cause detrimental or other quality conditions to occur in an endpoint device....
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7626937 |
System and method for network connection detection
The present invention provides a system and method that operates in the link layer and detects connection status in a LAN. The system includes a request frame whose source address is an address of...
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7627025 |
Echo canceller gain control for channel diagnostic systems
A method and apparatus for detecting faults in cables. The method and apparatus comprise receiving a reflected signal; multiplying an estimation of the reflected signal from an echo canceller by a...
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7623527 |
Method for analyzing network trace, method for judging order among nodes, processor for analyzing network trace, computer-executable program for controlling computer as processor, and method for correcting time difference among nodes in network
A processor and program for analyzing network trace with the use of data packets transmitted via a network includes: a memory section 32 for storing trace data generated from the data packets; a...
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7619982 |
Active probe path management
A technique manages paths taken by probe packets sent from a source to a target of a computer network. The novel path management technique enables each probe packet i) to be transferred onto a path...
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7616579 |
Voice over IP analysis system and method
A path diagnosis method and system for a VoIP network includes obtaining information on VoIP calls from the VoIP network using either Call Data Records (CDRs) or active testing, or both. A VoIP...
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7616577 |
Method and system for connection verification
The present invention provides a method and system for connection verification. An embodiment includes a DSL based system, with a tester resident at a central office respective to a DSLAM. When a...
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7616581 |
Path setup unit, path setup system and path setup method therefor
A path setup unit, path setup system and path setup method comprises; a plurality of NEs (Network Elements) which constitute a network and to which path setup is possible; a path setup unit which...
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7616575 |
System and method for link quality routing using a weighted cumulative expected transmission time metric
A system and method for link quality routing uses a weighted cumulative expected transmission time path metric. A system for routing in a multi-hop ad hoc network, and a method for measuring the...
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7613124 |
Method and apparatus for documenting network paths
Methods and apparatus for documenting network path connectivity are described that allow a network management system/revision management system (NMS/RMS) to determine what equipment and ports...
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7613125 |
Method and apparatus for temporal alignment of multiple parallel data streams
Methods and apparatus for aligning the transmitters of two or more bidirectional ports of an integrated circuit (IC), particularly an application-specific IC (ASIC) or field-programmable gate array...
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7609643 |
Transfer of error-analysis and statistical data after retry in a fibre channel input/output system
A computer Input/Output system having a fabric, a control unit (CU) and a host computes including a channel, the channel having a channel port connected by a first link to a channel neighbor port...
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7609705 |
Determination of a plurality of paths before selection of one path of the plurality of paths for transmission of one or more packets
An apparatus in one example comprises a first mesh network switch, of a plurality of mesh network switches, that employs mesh connection information of one or more mesh network switches of the...
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7607093 |
Displaying network segment decode information in diagrammatic form
Network analyzing systems and methods are disclosed herein for analyzing a segment of a data communications network. One example of a network analyzing system includes a network analyzer that...
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7606237 |
Sharing restoration path bandwidth in mesh networks
A shared mesh data network (SMDN) for path-based recovery at the packet level. In one implementation, a first link in the network is part of two or more different protection paths, where each...
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7606165 |
What-if analysis for network diagnostics
A network troubleshooting framework is described. In an implementation, a method includes generating a first estimation of network performance by a simulator based on network settings obtained from...
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7603588 |
Two-stage detection of trace identifier mismatches
Methods and apparatus for processing a trace mismatch by using hardware to detect a change in a trace string and software to perform string analysis are disclosed. In accordance with one aspect of...
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7602732 |
End-to-end connection packet loss detection algorithm using power level deviation
A method is described for detecting total end-to-end loss of data packets in a packet network that does not require direct access to the packet network. A test signal is generated at a source end...
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7602728 |
Method and apparatus for determination of network topology
Network topology information is determined in a network-based communication system by generating communications between, for example, selected pairs of endpoint devices each associated with a...
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7599302 |
Dynamic enforcement of MPLS-TE inter-domain policy and QoS
A technique dynamically enforces inter-domain policy and quality of service (QoS) for Traffic Engineering (TE) Label Switched Paths (LSPs) between a local domain and a remote domain in a computer...
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7599301 |
Communications network tap with heartbeat monitor
A communications network tap, comprises a first terminal and a second terminal adapted to couple the tap in-line in the network and communicate data packets with network devices. A heartbeat...
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7599303 |
System and methods for sending trace messages
A traceroute mechanism enables responses to the traceroute to reach the originating router (originator) along a multihop pseudowire (PW). A traceroute message includes an accumulator operable to...
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7596097 |
Methods and apparatus to prevent network mapping
A trace detector prevents network mapping and tracing by detecting an initial packet containing an initial time to live value that meets a first predetermined threshold range. The trace detector...
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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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7596096 |
Method and apparatus for providing trace route and timing information for media streams
An apparatus and method that use media packets, such as Real-time Transport Protocol (RTP), packets with a specially define profile to determine the route and round-trip-time information. The route...
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7595736 |
Network status indicating circuit
A network status indicating circuit for indicating network status is provided. In a preferred embodiment, the network status indicating circuit includes a signal-generating unit ( 100 ) configured...
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7590222 |
Techniques and apparatus for one way transmission delay measurement for IP phone connections
Techniques for measuring a one way delay between two handsets over an Internet protocol (IP) network utilize a delay measurement subsystem connected to both handsets and a procedure to couple a...
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7590503 |
Method and system for rerouteable cyclic redundancy check sum (CRC) for different sources
Provided is a system and method including a number of routers structured and arranged to route one or more video sources to any of one or more destinations. Each of the number of routers including...
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7583605 |
Method and system of evaluating survivability of ATM switches over SONET networks
In a particular embodiment, a method of evaluating a network is disclosed. The method identifies potential failure points between a layer two asynchronous transfer mode network and a layer one...
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7573825 |
Methods, apparatus and computer program products for testing a voice over Internet protocol communication system
Methods, apparatus, and computer program products are provided for testing a Voice Over Internet Protocol (VoIP) communication system. A VoIP test phone call is generated through an Internet...
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7570597 |
Discovery process in a vehicle network
A method of configuring a network within a vehicle, wherein the network includes a plurality of network elements and a plurality of communication links communicatively coupling the plurality of...
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7564796 |
Method and system for managing a network slowdown
A system and method are disclosed for managing a network slowdown. The method includes measuring a time for a packet to travel from a source node over a given path to a destination node in the...
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7564781 |
Determining throughput between hosts
An apparatus and method of determining throughput between a first host and a second host of at least one network is disclosed. The method includes the first host intentionally corrupting ICMP...
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7564795 |
Obtaining per-port location information for wired LAN switches
In one embodiment, a device with a wireless transceiver and a network interface, such as a wireless location determination device or a laptop with wireless capability and an Ethernet port, is...
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7561980 |
Transmission medium testing apparatus and method
The invention provides a method for testing a transmission medium used in a full-duplex communication system comprising an endpoint that comprises a transmitting end (TX) and a receiving end (RX);...
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7561532 |
Method and device for designing a data network
A method of designing a transport network having a plurality of network elements and a plurality of connections between the network elements by (a) defining a first network configuration and at...
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7561534 |
Methods of network routing having improved resistance to faults affecting groups of links subject to common risks
A number of techniques are described for routing methods that improve resistance to faults affecting groups of links subject to common risks. One of these techniques accounts for failure potentials...
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7558276 |
System and method for retrieving computed paths from a path computation element using a path key
A technique retrieves computed path segments across one or more domains of a computer network in accordance with a stateful (“semi-stateful”) path computation element (PCE) model. The stateful...
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7554925 |
Method and system for creating a quality of service message
A test program creates a variety of types of quality of service messages to allow a user to test the response of one or more network devices to the variety of messages. The test program displays a...
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7554996 |
Controlled distribution of inter-area routing information
A technique controls distribution of reachability information for a tail-end node of a traffic engineering (TE) label switched path (LSP) to a head-end node of the TE-LSP in a computer network. The...
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7555680 |
Distributed control apparatus
A distributed control system includes a plurality of PLCs which are connected together via active and backup transmission lines which are opposite in transmission direction. Each of the PLCs...
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7554923 |
Tandem connection activation/deactivation
A method for the automatic activation and deactivation of a tandem connection ( 2 - 6 ) is provided responsive to receiving an activation or deactivation request. Prior to activation, received...
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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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7545749 |
High-accuracy packet pair for network bottleneck bandwidth measurement
A novel packet filtering and processing mechanism solves bandwidth estimation problems related to cross-traffic, host limitations, and fabric-specific issues in order to accurately estimate...
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7539148 |
Circuit integrity in a packet-switched network
Techniques for performing a continuity check operation include sending a pattern of bits over a packet network connection through a first interface on a packet network to a second interface on the...
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