| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 370249000 | Loopback | 83 |
| 20080205286 | Test system using local loop to establish connection to baseboard management control and method therefor - A test system using a local loop to establish connection to baseboard management control is provided. The test system includes more than one host terminals having at least one network interface card (NIC) and at least one baseboard management controller (BMC) having one NIC. After establishing a connection for test between the host terminals and a remote subscriber, a connection for loop test is established with the BMC through a virtual address, so as to deliver a test instruction to the BMC for testing and to loop back a test result. The test system establishes the connection for loop test through the virtual address so as to perform a remote platform test similar to an inner loop test. Therefore, the test result will not be influenced by a network environment setting, and thus a batch test can be adopted to save the test time. | 08-28-2008 |
| 20080267081 | LINK LAYER LOOP DETECTION METHOD AND APPARATUS - In one embodiment, a method includes receiving an indicator that an packet has been received at a physical port of a bridge device within a network. The method also includes determining, in response to the indicator and based on a source address value associated with the packet, that an identifier of the physical port is not associated within a filter database with the source address value. A packet counter value associated with the physical port is changed in response to the determining. | 10-30-2008 |
| 20080267082 | Signaling Monitoring System, Signaling Network And Signaling Monitoring Method - A signaling monitoring system includes a signaling network node device having an IP interface, a signaling network monitoring device having an IP interface and an network, in which the signaling network node device and the signaling network monitoring device are connected to the IP network via the IP interface, respectively; the signaling network node device sends signaling messages to the signaling network monitoring device via the IP network; the signaling network monitoring device analyzes the received signaling messages and obtains the monitoring information. The disclosure also discloses a signaling network and a signaling network monitoring method. While the monitoring function is implemented, the transmission resource is saved. | 10-30-2008 |
| 20080304420 | APPARATUS AND METHOD FOR PERFORMING A LOOPBACK TEST IN A COMMUNICATION SYSTEM - The invention is test apparatus and methods for performing loopback tests. The tests involve generating a packet-based test message having a source address and a destination address. When the test message arrives at the destination, the addresses are exchanged and the message is returned to the source. The addresses can be level 2 addresses, such as MAC addresses, and/or level 3 addresses, such as IP addresses. The returned message and the propagation properties observed for the test message can be used to determine information about the network being tested. | 12-11-2008 |
| 20090003224 | T1 TURNAROUND PLUG TEST ADAPTOR - A test adaptor for performing turnaround testing on a T1 board that has a plurality of jack receptacles disposed therein. The test adaptor is comprised of a bracket, a plurality of openings, and a plurality of test plugs. The bracket has a length and a width complimentary to the length and the width of an end of a T1 board. The plurality of openings disposed in the bracket are spaced apart from each other by predetermined distances that are complimentary to the spacing between the plurality of jack receptacles disposed in the T1 board. The plurality of test plugs are mounted within the plurality of openings in the bracket such that the plurality of test plugs can be engaged with the plurality of jack receptacles substantially simultaneously and with a single mechanical step. | 01-01-2009 |
| 20090067337 | TESTING A CIRCUIT USING A SHARED BANDWIDTH TEST BUS - According to one embodiment, a method for testing a circuit includes receiving a test access session request, where the test access session request indicates that a test session is to be performed on a circuit path. A reservation message is sent to a test bus, where the reservation message reserves the test bus for the test session. The test bus includes a portion of bandwidth shared among a plurality of network elements. Traffic associated with the circuit path is copied to the test bus. | 03-12-2009 |
| 20090067338 | Determination of Channel Latency within a Round-Trip Path - The present invention provides a system, apparatus, and method for determining latency differences in channels within a link at a single test site. In particular, the method allows for a single transmitting device to determine distinct latency differences on both transmitter and receiver-side paths without requiring a terminating node on the other side of the connection. In other words, a switch is used, in lieu of such a terminating node, at the other side of the paths that switches at least one channel's content onto another channel and sends it back for a round trip on various transmitter-and-receiver-side-paths combinations. The present invention is based on round trip measurements and switching capability of the receiving node. | 03-12-2009 |
| 20090103443 | Loopback configuration for bi-directional interfaces - An interface for implementing a loopback configuration which offers improved calibration and/or testing of an electronic system is disclosed. More specifically, embodiments provide a bi-directional interface with at least two portions or partitions capable of communicating data in opposite directions and implementing a loopback configuration between components of an electronic system, thereby enabling more flexible, efficient and effective calibration and/or testing of the electronic system using a single interface. The loopback of the partitioned bi-directional interface may be used to perform data link training and/or electronic system testing. In one embodiment, the loopback configuration of the interface may be reversible. Additionally, the looped or coupled end of the partitions may be switched from one component to another, thereby reversing the configuration of the loopback in one embodiment. As such, embodiments enable different and/or additional calibration operations and/or tests to be performed when compared with conventional loopback configurations. | 04-23-2009 |
| 20090109864 | Network card testing system - A network card testing system includes a network card testing set, a network card, and a network card testing software. A plurality of twisted pairs in the network card testing set is connected with one another to form a loop. When the network card testing set is connected to the network card, a test loop is formed. The network card testing software is executed by a computer, and test data packets are directly generated and transferred through a data-link layer according to different testing strategies and network card information. And then, the test data packets are sent back through the formed test loop, and test results are calculated according to the test data packets. | 04-30-2009 |
| 20090141644 | Twisted pair cable plant cross talk coupling simulator - Example embodiments are directed to a system for simulating far end crosstalk (FEXT). The system includes digital subscriber lines coupled to a FEET matrix which simulates the FEXT environment. The FEXT matrix simulates the FEXT environment using filters disposed in disturber lines. Signals output from the filters are added to a path in the victim line to create an output signal. | 06-04-2009 |
| 20090161565 | System and Method of Remote Testing in Loopback Mode Using MGCP/NCS - This invention relates to a system and method of monitoring, by establishing end to end loopback testing across one or more networks with dissimilar transport technologies. The system allows for connection in loopback mode from a standard interface on a test device to a media adaptor located on an IP-based access network, such as a standard multimedia terminal adapter (“MTA”). End-to-End Quality of service delivered over the transmit and receive path can thus be monitored. Loopback tests are initiated from designated endpoints on the network and made operational by attaching a tag to a telephone number, to allow the gateway to signal connection mode to a call agent. The system and method overcome certain inherent limitations of the MGCP/NCS architecture | 06-25-2009 |
| 20090185498 | SMALL FORM FACTOR PLUGGALBE (SFP) STATUS INDICATOR - A small form factor pluggable (SFP) device includes a controller for receiving a first input signal. An optical loopback circuit is coupled to the controller for feeding back a loopback signal to the controller. The loopback signal is generated from the first input signal. An indicator is coupled to the controller for indicating a operational status of the device. | 07-23-2009 |
| 20090207742 | FRAME TRANSMISSION DEVICE AND LOOP JUDGING METHOD - A frame transmission device having a port for transmitting and receiving a frame and a learning table for storing a transmission source address included in the frame received at the port and the receiving port in association with each other includes: a port detector for detecting whether learning data coincident with the transmission source address included in the frame received at the port is stored in the learning table; a port judging unit for comparing a port learned in the learning data detected by the port detector to the receiving port; and a loop judging unit for judging on the basis of a time lapse from the storage of the learning data whether the frame is in a loop or not when the port learned in the learning data is not coincident with the receiving port. | 08-20-2009 |
| 20090252045 | NETWORK SYSTEM - A network system for judging abnormality of a self node with high precision on the basis of information from other nodes connected to a network is provided. In each node, a frequency at which data frames to be transmitted/received among nodes cannot be received is counted every communication partner node by a reception time-out error count unit. After some node is reset and restored, a start-up signal is transmitted with an initial data frame by a start-up signal transmitting unit of the node concerned. In the other nodes receiving the start-up signal, a count result of the transmission destination node of the start-up signal by a reception time-out error count unit is returned by the monitoring result returning unit, and upon reception of the count result, the node which transmits the start-up signal makes a self-diagnosis by a self-diagnosing unit. | 10-08-2009 |
| 20090296589 | METHOD AND APPARATUS OF MEASURING TCP NETWORK ROUND TRIP TIME - Network round trip time is measured as an initial value at a start of a network communication flow. If sufficient data is available subsequently during a communication flow, subsequent network round trip time value determinations are made, without TCP stack overhead and time out values being included in the determined value. | 12-03-2009 |
| 20090316588 | COMMUNICATION NODE, AND RING CONFIGURATION METHOD AND RING ESTABLISHMENT METHOD IN COMMUNICATION SYSTEM - A plurality of communication nodes are one-to-one connected to each other by Ethernet (registered trademark) which is duplicated with a normal-system ring and with a standby-system ring. The communication node includes an A port, a B port, and a communication processor that performs a process of receiving a frame output from the B port and a process of transmitting the frame from the normal-system ring from the B port when the communication is normal. When other communication node performs a loop-back process due to communication abnormality, the communication node performs only a process of forwarding a frame input from the standby-system ring in the B port without receiving the frame and performs a process of transmitting the frame from the A port to the standby-system ring. | 12-24-2009 |
| 20100008237 | METHOD FOR TESTING DATA PACKET TRANSCEIVER USING LOOP BACK PACKET GENERATION - A method for testing a data packet transceiver as a device under test (DUT) by communicating, between one or more test instruments and the DUT, multiple data packets having at least one mutually distinct signal characteristic, such as data packet type, transmission power or transmission frequency. | 01-14-2010 |
| 20100061254 | Technical Enhancements to STP (IEEE 802.1D) Implementation - An embodiment includes a method of minimizing the delay in convergence time for a complex STP topology following a topology change in the network system in the spanning tree protocol (STP) standard, including: receiving, by a root port of a first bridge, a data message that includes identification of a current root bridge and a priority value of the current root bridge; receiving, by a second port of the first bridge, a second data message from a second bridge; and if a message age timer of the first bridge has less than a limiting message age time value remaining before expiry, then blocking a reply, by the second port of the first bridge, to the second data message from the second bridge. | 03-11-2010 |
| 20100074122 | TELECOMMNICATIONS APPARATUS AND METHOD, STORAGE MEDIUM, AND PROGRAM - A data transmitting apparatus including a transmitting unit connected to a first network and configured to transmit a check packet to a data receiving apparatus; a control unit configured to receive an acknowledgment message to the check packet from the data receiving apparatus, the acknowledgment message including acknowledgment information based on shared data shared with said data receiving apparatus; a computing unit configured to compute an expected acknowledgment information based on the shared data shared with said data receiving apparatus; a comparing unit configured to produce a comparison result for said data receiving apparatus based on the acknowledgment information and the expected acknowledgment information; a timer configured to determine whether a response time of the acknowledgment message is less than a predetermined time; and a judgment unit configured to judge whether to stop transmission of content data based on the comparison result and the determination of the timer. | 03-25-2010 |
| 20100091665 | LOOPBACK DEVICE AND MIRRORING METHOD - A transmission destination of a packet to be transmitted by a web server ( | 04-15-2010 |
| 20100103826 | REDUNDANT ACKNOWLEDGMENT IN LOOPBACK ENTRY - Redundant acknowledgment between agents performing a loopback test over bidirectional communications bus is described. In one example, in a processor including a communications agent coupled to a bidirectional communications bus, the communications agent initiates loopback communications to a second agent, sends a packet including a redundant acknowledgment sequence to the second agent, receives the packet including the redundant acknowledgement sequence looped back from the second agent, determines whether the received redundant acknowledgment sequence is valid, sends a test sequence to the second agent, receives the test sequence looped back, and if the received redundant acknowledgment sequence is determined to be valid, then checks the received test sequence. | 04-29-2010 |
| 20100124174 | COMMUNICATION DEVICE AND LOOPBACK TESTING METHOD - There is provided communication device operable to verify normality of a network by a loopback test, the communication device including a plurality of ports used to connect to a physical link included in the network, and an identification information addition part to add virtual port information used to identify a virtual port to a reply frame when receiving a message frame to the virtual port set on the physical link, the message frame being used to verify normality of the network by the loopback test, and replying the reply frame in which the virtual port information is added, to a communication device that has transmitted the message frame. | 05-20-2010 |
| 20100149999 | Methods and Apparatus to Pre-Qualify User Communities for Communication Services - Example methods and apparatus to pre-qualify user communities for communication services are disclosed. An example method comprises configuring a first remote network demarcation associated with a first loop to a loop-back state, interrogating the first loop to determine a first parameter representative of the first loop, configuring a second remote network demarcation associated with a second loop to the loop-back state, interrogating the second loop to determine a second parameter representative of the second loop, and compiling a report based on the first and second parameters, the report containing a value that represents a degree to which a communication service can be provided to a user community associated with the first and second loops. | 06-17-2010 |
| 20100165852 | NODE APPARATUS AND METHOD FOR PERFORMING A LOOPBACK-TEST ON A COMMUNICATION PATH IN A NETWORK - A communication path is set from an ingress node to an egress node on the basis of a specified path setting protocol, and a loopback-test signal is transmitted to the egress node through the communication path so as to perform a loopback-test on the egress node. The ingress node receives a loopback-test response signal transmitted from the egress node on which the loopback-test has been performed, and determines whether or not a loopback-test on the egress node has ended normally by analyzing the received loopback-test response signal. | 07-01-2010 |
| 20100182914 | APPARATUS AND METHOD FOR TESTING AND FAULT ISOLATION IN A COMMUNICATION NETWORK - An apparatus and method for performing automated testing and trouble isolation of a communications link in an access network is described. Communications link testing may occur without taking the communications link out of service for the duration of the test. | 07-22-2010 |
| 20100238812 | Operating MPLS label switched paths and MPLS pseudowire in loopback mode - In one embodiment, an initiating maintenance end point (MEP) may transmit a lock message to lock a circuit traversing one or more maintenance intermediate points (MIPs) between the initiating MEP and an end MEP. The initiating MEP may then transmit an in-band packet containing a loopback request to a particular MIP along the circuit using a particular time-to-live (TTL) value in the packet to reach the particular MIP. Upon receiving the packet at the particular MIP, and in response to determining that the TTL has expired, the particular MIP inspects the packet to discover the loopback request, and correspondingly operates in a loopback mode. | 09-23-2010 |
| 20100284285 | FEED LINE MONITOR APPARATUS - A power reception apparatus receives feed information from a predetermined line of a communication cable and judges a state of the power reception apparatus. If the state is normal, it transmits the feed information by returning it to a line which is a pair with the predetermined line. | 11-11-2010 |
| 20100322085 | SYSTEM FOR AND METHOD OF USING A LOOPBACK MECHANISM TO PERFORM NETWORK TESTING - A system for and method of actively running performance tests is presented. The system and method allow a device connected, via a VPN or IPSec tunnel, to a VoIP or other service provider network, to run network performance tests using the IP address assigned by a VPN concentrator. The device utilizes the IP address assigned by the VPN concentrator as a means for performing loopback testing. These performance tests characterize the connectivity of the network. Systems and methods then use this characterization to do call admission control, traffic shaping or prioritization. | 12-23-2010 |
| 20110026411 | METHODS AND SYSTEMS FOR FAIL-SAFE COMMUNICATION - A communication network is described. The network includes communication media and a plurality of network nodes coupled by the communication media. Each of the plurality of network nodes includes a first communication channel and a second communication channel. The first communication channel includes a first physical layer transceiver (PHY device) and the second communication channel includes a second PHY device. The plurality of network nodes are coupled in a dual ring-type topology. | 02-03-2011 |
| 20110085451 | TESTING DEVICE AND TESTING METHOD - A testing device connected to at least one network adaptor, including: a transmission application unit to give an instruction of transmitting data to a virtual address defined as a destination address; an address translation unit to translate, if a test mode is set up, the destination address of the data into an address allocated to the network adaptor connected to the testing device, send the data to the network adaptor or another network adaptor connected to said the testing device and get the network adaptor or the another network adaptor to transmit the data; a reception application unit to receive the data via the network adaptor to which the translated destination address is allocated; and a calculation unit to calculate a test result based on a transmission result of the data. | 04-14-2011 |
| 20110096672 | Methods, Test Systems and Arrangements for Verifying Compliance with Requirement Specifications - A method for verifying compliance of a communication device with one or more requirement specifications is disclosed. The method comprises establishing a link between a test system and the communication device, wherein the establishing comprises configuring two or more bearers, one or more control channels, and one or more uplink packet filters; closing a test loop comprising the test system and the communication device, wherein the closing comprises activating a test loop function of the communication device; sending units of data associated with different service data flows in a downlink of the test loop from the test system to the communication device, each of the units of data including information representing the service data flow associated with the unit of data; receiving the units of data at the communication device; transferring the units of data to an uplink transmission arrangement of the communication device; and verifying, at the test system, that each of the units of data is transmitted, by the communication device in an uplink of the test loop to the test system, on a correct bearer corresponding to the service data flow associated with the respective unit of data according to the one or more uplink packet filters. Corresponding test system and test loop function arrangement are also disclosed. | 04-28-2011 |
| 20110128863 | LOOP DETECTION METHOD AND NETWORK DEVICE APPLYING THE SAME - A network device including an address move detection unit, a loop detection packet generation unit, a packet parser unit and a loop determination unit coupled to the packet parser unit is provided. The address move detection unit detects whether an address field of a first packet received by the network device is moved. The loop detection packet generation unit generates a loop detection packet if the address move detection unit detects that the address field is moved. The packet parser unit parses a second packet received by the network device to extract an information. Based on the information, the loop determination unit determines whether the second packet matches the loop detection packet so as to determine whether there is any loop existing in the network device. | 06-02-2011 |
| 20110176431 | PHYSICAL LAYER LOOPBACK - In some embodiments, a chip comprises control circuitry to provide inband signals, inband output ports, and transmitters to transmit the inband signals to the inband output ports. The control circuitry selectively includes loopback initiating commands in the inband signals. Other embodiments are described and claimed. | 07-21-2011 |
| 20110261702 | ROUTE SETUP SERVER, ROUTE SETUP METHOD AND ROUTE SETUP PROGRAM - A route setup server has a storage unit a route designing unit. Next hop information indicating candidates of a next hop node for each node is stored in the storage unit. In response to a route setup request specifying a source node and a destination node of flow, the route designing designs a communication route between them. Specifically, the route designing unit has a next hop determination unit that executes “next hop determination processing” with reference to the next hop information. In the next hop determination processing, the next hop determination unit randomly selects one from the candidates of the next hop node regarding a target node and updates the target node to the selected one. The next hop determination unit determines the communication route one-hop by one-hop by initializing the target node to the source node and then repeating the next hop determination processing until the target node becomes the destination node. | 10-27-2011 |
| 20110317564 | High-Speed Ethernet Transceiver Calibration with Echo Canceller Reuse - A method of operating a transceiver integrated circuit is disclosed. The method comprises generating test signals directed to testing one or more transceiver parameters. The test signals are transmitted from a digital domain to an analog domain along a transmit path, and looped-back from the transmit path to a receive path. Echo canceller circuitry coupled between the transmit path and the receive path is trained and generates a filtered output representing a metric indicative of the one or more transceiver parameters. | 12-29-2011 |
| 20120039187 | Intelligent Loop Diagnostics for Digital Subscriber Line Services to Support a Service Assurance System - A method of diagnosing a transmission loop in an Internet protocol television (IPTV) network includes configuring the loop as an open loop and performing a single-ended loop test (SELT), configuring the loop as a terminated-loop and performing another SELT, subtracting a trace of the first SELT from a trace of the second SELT, and determining the length of the loop from the result. A service assurance system in an IPTV network includes a test module and a DSLAM coupled to a residential gateway by a transmission loop. The test module operates to determine that a fault condition on the IPTV network is caused by a fault in the loop, direct the DSLAM to perform an open loop SELT and a terminated-loop SELT on the loop, receive the results of the SELTs, and determine a location of a tap on the loop based upon the results. | 02-16-2012 |
| 20120039188 | NETWORK CONECTION DEVICE AND METHOD FOR TESTING NETWORK PORTS OF THE NETWORK CONNECTION DEVICE - A method tests network ports of a network connection device. Multiple port pairs of the network connection device are set. Each of the port pairs includes an external network port and an internal network port of the network connection device. Each internal network port is connected to a loopback device. For each port pair, a data packet is created and transmitted from the external network port of the port pair to the internal network port of the port pair. The data packet transmitted to the internal network port of the selected port pair is compared with a corresponding data packet returned from the internal network port of the selected port pair via the corresponding loopback device. A test result of the port pair is displayed by a display device to indicate whether data transfer of the port pair is normal. | 02-16-2012 |
| 20120063332 | SYSTEM AND METHOD FOR DETERMINING AND CONTROLLING LOOPBACK POINTS IN A NETWORK ENVIRONMENT - A method is provided in one example and includes establishing a path for a media session between a first network element and a second network element. A third network element is detected along the path. A response is received from the third network element indicating that it is capable of performing a loopback activity that involves the first network element. A test packet is communicated from the first network element to the third network element in order to evaluate characteristics associated with the media session. In more specific implementations, the response includes an indication as to a proximity of the third network element in relation to the first network element. The first network element can receive additional responses from a plurality of network elements such that the first network element generates a list of available network elements for performing loopback activities. | 03-15-2012 |
| 20120087252 | METHOD AND APPARATUS FOR LINE LATENCY MEASUREMENT IN TRANSPORT NETWORKS - In order to measure the latency of a particular transport service from end to end, a method of measuring the latency of a transport connection between a first network node (N | 04-12-2012 |
| 20120093006 | AUTO REPLY AND LOOP-BACK METHOD FOR THE REMOTE MEASUREMENT OF THE QUALITY OF AN INTERNET PHONE - A method of automatic response and loop-backing is developed for remotely measuring the quality of the Internet telephone by IP phone. When a quality measuring instrument is requested to measure the quality of Internet telephone, a request call is placed to an IP phone for quality measurement. The method of automatic response and loopback is enable the IP phone to handle the call for quality measuring without interrupting the user of IP phone without affecting utilization of supplementary Internet telephone services. | 04-19-2012 |
| 20120113819 | System and Method of Remote Testing in Loopback Mode Using MGCP/NCS - This invention relates to a system and method of monitoring, by establishing end to end loopback testing across one or more networks with dissimilar transport technologies. The system allows for connection in loopback mode from a standard interface on a test device to a media adaptor located on an IP-based access network, such as a standard multimedia terminal adapter (“MTA”). End-to-End Quality of service delivered over the transmit and receive path can thus be monitored. Loopback tests are initiated from designated endpoints on the network and made operational by attaching a tag to a telephone number, to allow the gateway to signal connection mode to a call agent. The system and method overcome certain inherent limitations of the MGCP/NCS architecture | 05-10-2012 |
| 20120113820 | CONGESTION DETECTING METHOD AND COMMUNICATION NODE - An inspection signal to inspect forward-path or return-path communication, is transmitted from a reference node of a network. A response signal is transmitted in a priority class from a node of a forward path to the reference node. In the case of inspection of return-path communication, a replica of the response signal is transmitted in a non-priority class from the node of the forward path to the return path, and the node that receives the replica of the response signal transfers the replica in a priority class to the reference node. In the case of inspection of forward-path communication, a replica of the inspection signal is transmitted in a non-priority class from the node of the forward path to the forward path, and a replica of the response signal is transmitted in a priority class from the node that receives a replica of the inspection signal to the reference node. | 05-10-2012 |
| 20120120812 | METHOD AND APPARATUS FOR INFERRING STATE TRANSITIONS IN A WIRELESS COMMUNICATIONS NETWORK - A method, a computer readable medium and an apparatus for inferring state transitions in a wireless communications network are disclosed. In one embodiment, the method infers a state promotion procedure. In another embodiment, the method infers a state demotion procedure. | 05-17-2012 |
| 20120120813 | Monitoring of Delay in Packet-Switched Networks - A method is proposed for determining the round-trip delay for sending multimedia data, such as voice or video data, between a first network node and a second network node over a communications network, where data is encapsulated in data units comprising at least one frame of encoded data. The method includes the steps of: said first network node sending a request for reconfiguration of the data unit structure to the second node; the first node detecting a reconfiguration response from the second node, where the reconfiguration response comprises at least one data unit of data having a structure that corresponds to the request for reconfiguration. The first node then measures the time elapsed between sending the reconfiguration request and detecting the reconfiguration response and determines a value for roundtrip delay using said measured time. In accordance with a first embodiment, the request for reconfiguration is a request to change the encoding mode of the multimedia data. A node adapted to measure this round-trip delay is also proposed. | 05-17-2012 |
| 20120155289 | APPARATUS AND METHOD FOR LOOP-BACK IN WIRELESS COMMUNICATION SYSTEMS - Disclosed is a loop-back apparatus in wireless communication systems, including: an MAC processing unit configured to transmit a user data and a control frame when a loop-back mode is established; a loop-back unit configured to generate a response frame of a receipt for the user data and the control message transmitted from the MAC processing unit and again feedbacks the generated response frame to the MAC processing unit. | 06-21-2012 |
| 20120170465 | VALIDATING ETHERNET VIRTUAL CONNECTION SERVICE - A network element in an Ethernet network comprises circuitry configured for providing a plurality of different functionalities. A first portion of the circuitry is configured for providing traffic generator functionality is provided. A second portion of the circuitry is configured for providing traffic analyzer functionality. A third portion of the circuitry is providing traffic loop-back functionality. The various portion of the circuitry (i.e., the circuitries) are operable for selectively enabling the network element to support a unidirectional test mode and a bi-directional test mode and for enabling the network element to be selectively operated as a local network element and a remote network element. | 07-05-2012 |
| 20120213093 | CONNECTIVITY FAULT MANAGEMENT IN A PROVIDER BACKBONE BRIDGE TRAFFIC ENGINEERING (PBB-TE) DOMAIN - A system and method for providing Connectivity Fault Management, CFM, in a Provider Backbone Bridge Traffic Engineering, PBB-TE, telecommunication network utilizing Ethernet-based packet transport. PBB-TE point-to-point and point-to-multipoint services are identified, and PBB-TE maintenance points ( | 08-23-2012 |
| 20120218905 | METHOD AND APPARATUS FOR A SHARED I/O NETWORK INTERFACE CONTROLLER - A shared network interface controller (NIC) interfaces a plurality of operating system domains as part of the load-store architecture of the operating system domains. A bus interface couples the NIC to a load-store domain bus (such as PCI-Express), using header information to associate data on the bus with an originating operating system domain. Transmit/receive logic connects the NIC to the network. Association logic allows the NIC to designate, and later lookup which destination MAC address (on the Ethernet side) is associated with which operating system domain. Descriptor register files and Control Status Registers (CSR's) specific to an operating system domain are duplicated and made available for each domain. Several direct memory access (DMA) engines are provided to improve throughput. Packet replication logic, filters (perfect and hash) and VLAN tables are used for looping back packets originating from one operating system domain to another and other operations. | 08-30-2012 |
| 20120281550 | RECEIVER, TRANSMITTER, FEEDBACK DEVICE, TRANSCEIVER AND SIGNAL PROCESSING METHOD - The present invention provides a receiver, a transmitter, a transmitter feedback device, and corresponding methods. The feedback device includes: a multi-channel frequency selection band-pass circuit, configured to receive a multi-frequency band feedback signal, and output a feedback signal of each frequency band in a time-division manner; a feedback local oscillator, configured to provide feedback local oscillation corresponding to each frequency band in a time-division manner; a mixer, configured to mix the feedback signal of each frequency band from the multi-channel frequency selection band-pass circuit and the feedback local oscillation corresponding to each frequency band from the feedback local oscillator, and output an intermediate frequency signal of each frequency band in a time-division manner. A solution in which only one set of signal processing channels is used to process the signals of multiple frequency bands in the uplink, the downlink or both the uplink and downlink is provided. | 11-08-2012 |
| 20130077499 | METHOD AND APPARATUS FOR CIRCUIT EMULATION WITH INTEGRATED NETWORK DIAGNOSTICS AND REDUCED FORM FACTOR IN LARGE PUBLIC COMMUNICATION NETWORKS - An multiservice access device (MAD) for Ethernet and DS1/DS3 services is provided for public communications carriers (telcos), for example, and has a reduced form factor (e.g., Type 400 NCTE mechanics or small enclosure), at least two 2.5 Gb/1 Gb facility side ports, at least four full rate GigE drops, complementary RJ48C demarcation and stub-ended DS1 cable options, integral T1 NIUs for in-band loopback, NPRM, SPRM, AIS/AIS-CI and RAI/RAI-CI diagnostics, lightning protection, and protection switching. The MAD has built-in SynchE and IEEE 1588 synchronization, and Stratum 3 and incoming DS1/DS3 synchronization capabilities. | 03-28-2013 |
| 20130083671 | DATA PLANE DELAY KPI MONITORING IN LIVE NETWORK - A method and apparatus for Data Plane Delay KPI Monitoring in a live network is disclosed for measuring node delays in a manner that allows latency to be apportioned to network elements. The method and apparatus for Data Plane Delay KPI Monitoring in a live network includes establishing a call session, propagating a probe session commencement indicator, capturing timestamps for incoming and outgoing packets associated with the call session at the network nodes, propagating a probe session stop indicator which causes the network nodes to cease collecting timestamps and then transmitting the timestamps to a Network Management System. | 04-04-2013 |
| 20130114420 | PHYSICAL LAYER LOOPBACK - In some embodiments, a chip comprises control circuitry to provide inband signals, inband output ports, and transmitters to transmit the inband signals to the inband output ports. The control circuitry selectively includes loopback initiating commands in the inband signals. Other embodiments are described and claimed. | 05-09-2013 |
| 20130155877 | OPERATING MPLS LABEL SWITCHED PATHS AND MPLS PSEUDOWIRE IN LOOPBACK MODE - In one embodiment, a circuit that extends between a head-end label switching router (LSR) and a tail-end LSR and traverses one or more intermediate LSRs is locked to data plane traffic. The head-end LSR transmits a packet along the circuit that includes a particular time-to-live (TTL) value configured to expire at a particular intermediate LSR at which loopback is to occur. The circuit is used in a loopback mode. The head-end LSR transmits along the circuit a packet that includes a cease loopback request. The circuit ceases to be used in the loopback mode. The circuit is unlocked to permit the circuit to pass data plane traffic. | 06-20-2013 |
| 20130215765 | UTILITY COMMUNICATION METHOD AND SYSTEM - Exemplary embodiments are directed to use of transparent transmission of teleprotection commands in the form of GOOSE or GSSE messages, as defined by the Generic Substation Event class model by the standard IEC 61850, between substations combined with Channel Supervision and Monitoring equivalent to CSM offered by known teleprotection equipment. This approach avoids the disadvantage of non-transparent transmission when using the gateway approach and of the lack of the CSM functionality when using the tunnelling approach. | 08-22-2013 |
| 20130223236 | CHANNEL INTERLEAVED MULTIPLEXED DATABUS - A serial communication system includes a controller, a channel interleaved multiplexed data bus coupled to the controller, and a transceiver coupled to the channel interleaved multiplexed data bus. The channel interleaved multiplexed data bus is arranged as a two dimensional array of time domain interleaved data channels on a backplane of the communication system, the two dimensional array being based on a number of channels available on the backplane and fixed pattern sequence of data transmitted on the backplane. | 08-29-2013 |
| 20130229926 | Ethernet Communication Device with Reduced EMI - A network device includes a physical layer transceiver configured to receive incoming data on a data link at an input clock rate and to store the incoming data in a buffer. The physical layer transceiver includes a Media Independent Interface (MII) controller configured to receive the incoming data stored in the buffer and to transmit the incoming data over a MII bus based on a MII clock where the MII clock is a spread spectrum clock. The network device further includes a Media Access Control (MAC) device configured to receiving incoming data from the physical layer transceiver over the MII bus where the incoming data is clocked by the spread spectrum MII clock. | 09-05-2013 |
| 20130229927 | LAYER 2 AND 3 LATCHING LOOPBACKS ON A PLUGGABLE TRANSCEIVER - A pluggable transceiver, and its use, looping back Layer | 09-05-2013 |
| 20130272142 | Intelligent Loop Diagnostics for Digital Subscriber Line Services to Support a Service Assurance System - A method of diagnosing a transmission loop in an Internet protocol television (IPTV) network includes configuring the loop as an open loop and performing a single-ended loop test (SELT), configuring the loop as a terminated-loop and performing another SELT, subtracting a trace of the first SELT from a trace of the second SELT, and determining the length of the loop from the result. A service assurance system in an IPTV network includes a test module and a DSLAM coupled to a residential gateway by a transmission loop. The test module operates to determine that a fault condition on the IPTV network is caused by a fault in the loop, direct the DSLAM to perform an open loop SELT and a terminated-loop SELT on the loop, receive the results of the SELTs, and determine a location of a tap on the loop based upon the results. | 10-17-2013 |
| 20130329574 | Circuit Arrangement for RF Loopback - A circuit arrangement includes a transceiver unit, a switching device coupled to the transceiver unit with a terminal and a control device coupled to the switching device. The control device is configured to operate in a first and in a second mode of operation. In the first mode of operation, the switching device is configured by the control device such that a first signal is routed from the transceiver unit via the switching device back to the transceiver unit in a feedback loop. In the second mode of operation, the switching device is configured by the control device such that a second signal is routed from the transceiver unit via the switching device to the terminal or the second signal is routed from the terminal via the switching device to the transceiver. | 12-12-2013 |
| 20140029446 | INTERNET PACKET QUALITY MONITOR - A system for determining packet quality on an Internet protocol-based (IP-based) network includes a packet test device that traces multiple paths on the IP-based network to obtain node identifiers corresponding to nodes on each path, and an Internet quality monitor (IQM) that associates a quality metric with each path, and associates an identified link between nodes in a path with one of the quality metrics. A method for monitoring quality of data on an Internet protocol (IP)-based network includes deriving a network topology corresponding to a portion of the IP-based network, determining a quality metric associated with a path in the network topology, deriving a link in the path, and determining a quality metric associated with the link based on the quality metric associated with the path. | 01-30-2014 |
| 20140105034 | METHOD AND ETHERNET SWITCHING DEVICE FOR DETECTING LOOP POSITION IN ETHERNET - A method for detecting loop position in an Ethernet network, includes: the Ethernet switch device learns a MAC address; in a MAC table, a first MAC address corresponds to a first port before the leaning of MAC address, and the first MAC address corresponds to a second port after the learning of MAC address; if the second port and the first port do not belong to the same sub-network, an interval between a time of learning on the second port and a time of transmitting a last packet or receiving a last packet from the first port is calculated; and if the interval is smaller than a predetermined judgment threshold of host migration, it is determined that a loop exists in a sub-network connected to the second port. | 04-17-2014 |
| 20140160944 | TESTING USING ANALOG NEAR END LOOP BACK CIRCUIT - Particular embodiments described herein can offer an electronic device that includes a transmit circuit to form part of a transmit interface, and a receive circuit to form part of a receive interface. The transmit circuit and the receive circuit are to test at least one functional aspect of the electronic device on which the transmit circuit and the receive circuit reside. The transmit circuit and the receive circuit are coupled together by an analog near end loop back connection established through a resistor segment. | 06-12-2014 |
| 20140198667 | MEASUREMENT METHOD - The performance of a test apparatus for a communications network may be inferred by analyzing a set of performance data results measured on a number of different lines in the network. Once a sample of sufficient size for a particular test apparatus has been created then it is possible to infer the performance of the test apparatus based on the ratio of passes to fails recorded. | 07-17-2014 |
| 20140211638 | METHOD AND SYSTEM FOR DETECTING SLEEPING CELL - Embodiments of the present invention provide a method for detecting a sleeping cell and a system including: a network management device and a base station, where the network management device is configured to send a detection command being used to indicate performing a loopback test for the base station, where the loopback test is a test for a cell controlled by the base station; the base station is configured to receive the detection command from the network management device, perform the loopback test for the cell by simulating the user equipment, generate a detection result of a sleeping cell according to a result of the loopback test, and send the detection result of the sleeping cell to the network management device; and the network management device is further configured to determine whether the cell is a sleeping cell according to the detection result of the sleeping cell. | 07-31-2014 |
| 20150016278 | NETWORK LATENCY TESTING - In general, techniques are described that may allow a network element to analyze the performance of a network without using external equipment external to the network. In one example, a method includes injecting a plurality of data units onto the network, forwarding the plurality of data units around the network loop, injecting at least one timing data unit on to the network, forwarding the at least one timing data unit around the network loop, and determining at least one latency statistic correlated to the at least one characteristic of the forwarded plurality of data units. | 01-15-2015 |
| 20150103677 | SYSTEM AND METHOD FOR MANAGING VIRTUAL LINK STATE - A system and method of managing virtual link state includes receiving, at a first device, a first status update associated with the virtual link from a second device. The first status update includes a first management status value (RM) and a first operational status value (RO). The system and method further includes determining a second management status value (LM) associated with the first device, determining a second operational status value (LO) based on the first status update and the RM, transmitting a second status update for the virtual link to the second device, the second status update including the LM and the LO, and determining a state of the virtual link based on the RM, the RO, the LM, and the LO. The first device is configured to be coupled to the second device using a physical network link partitioned into a plurality of first virtual links including the virtual link | 04-16-2015 |
| 20150131457 | GAIN ASYMMETRY CHARACTERIZING CIRCUIT AND METHOD FOR DETERMINING CHARACTERISTICS OF GAIN ASYMMETRY POSSESSED BY TRANSMITTER - A gain asymmetry characterizing circuit for determining characteristics of gain asymmetry possessed by a transmitter includes a baseband loopback path, a test signal generating unit and a gain asymmetry measuring unit. The baseband loopback path is coupled to a baseband node on a first transmission path of the transmitter. The test signal generating unit is arranged to generate a first differential baseband test signal pair to the first transmission path. The first differential baseband test signal pair includes a first baseband signal and a second baseband signal. During a first period, the first baseband signal and the second baseband signal are fed into a positive input node and a negative input node of the first transmission path, respectively. During a second period, the second baseband signal and the first baseband signal are fed into the positive input node and the negative input node of the first transmission path, respectively. | 05-14-2015 |
| 20150138994 | SYSTEM AND METHOD FOR NOTIFICATION OF QoE ISSUES - A computer-implemented method, computer program product, and computer system for notification of a QoE (Quality of Experience) issue in a network service. An end user device sends the notification to a server providing the network service, in response to determining that calculated QoE metrics is below a predetermined level for a predetermined time period. The server resolves the QoE issue, in response to determining that the QoE issue is listed to be resolved by the server. The server forwards the notification of the QoE issue to a system administrator, in response to determining that the QoE issue is not listed to be resolved by the server. | 05-21-2015 |
| 20150304203 | RESISTANCE ARRANGING SYSTEM AND METHOD BASED ON RS-485 NETWORK - A resistance arranging system and method based on a RS-485 network are disclosed. A detection packet is generated and a circuit loop is received, so that the detection packet is taken as a basis signal and the received detection packet through the circuit loop is taken as a comparison signal, and push-up, pull-down and terminal resistors are arranged by controlling the switch according to the basis signal and the comparison signal, whereby achieving in a technical efficacy of convenience of promoting the resistors arrangement. | 10-22-2015 |
| 20150341186 | METHOD AND APPARATUS FOR CIRCUIT EMULATION WITH INTEGRATED NETWORK DIAGNOSTICS AND REDUCED FORM FACTOR IN LARGE PUBLIC COMMUNICATION NETWORKS - An multiservice access device (MAD) for Ethernet and DS1/DS3 services is provided for public communications carriers (telcos), for example, and has a reduced form factor (e.g., Type 400 NCTE mechanics or small enclosure), at least two 2.5 Gb/1 Gb facility side ports, at least four full rate GigE drops, complementary RJ48C demarcation and stub-ended DS1 cable options, integral T1 NIUs for in-band loopback, NPRM, SPRM, AIS/AIS-CI and RAI/RAI-CI diagnostics, lightning protection, and protection switching. The MAD has built-in SynchE and IEEE 1588 synchronization, and Stratum 3 and incoming DS1/DS3 synchronization capabilities. | 11-26-2015 |
| 20150358180 | NETWORK DEVICE - This network device ( | 12-10-2015 |
| 20150372799 | System and Method for Radio Full Duplex - In one embodiment, a method for determining self-interference in radio full duplex includes transmitting, by a first radio transmitter and an antenna, a first signal and receiving, by a first radio receiver and the antenna, a reflection of the first signal. The method also includes estimating a channel in accordance with the first signal and the reflection of the first signal to produce an estimated channel and determining a second signal in accordance with the estimated channel. Additionally, the method includes transmitting, by a second radio transmitter, the second signal and removing a self-interference component of the reflection of the first signal to produce a corrected signal. | 12-24-2015 |
| 20150381445 | RETAINING SERVICE CONFIGURATION DURING TEST CONNECTION - A method for retaining service configuration during test connection to a pseudowire service is disclosed. The method for retaining service configuration during test connection includes the steps of configuring a test service access point; providing a first instruction at a first network element to lock the pseudowire connection; providing a second instruction at a second network element to lock the pseudowire connection; receiving an instruction at said the network element to associate a test service provided at a network management element to said first Service Distribution Point; and providing a loopback instruction to the pseudowire connection. The method for retaining service configuration during test connection to a pseudowire service provides advantages over systems known in the art by eliminating the need for reconfiguring the connection to customer equipment at the point of test and afterwards. | 12-31-2015 |
| 20160020974 | NETWORK DEVICE, COMMUNICATION METHOD, PROGRAM, AND RECORDING MEDIUM - According to the present invention, a network device includes a plurality of ports which are connected to a LAN; a communication controller; and a communication shutoff release unit. The communication controller includes: a linkup detection unit, a loop detection frame sending out unit that sends out the loop detection frame from a linkup detected port, which is a port for which the linkup is detected, after a predetermined period from a time point when the linkup is detected by the linkup detection unit to the local area network, and a loop detection frame detection unit that detects the loop detection frame if the loop detection frame is received on the each port. The communication shutoff release unit releases the shutoff of the communication on the linkup detected port only if the loop detection frame is not detected by the loop detection frame detection unit. | 01-21-2016 |
| 20160028589 | DATA LOOP DETECTION - Data loop detection can include receiving, from a network controller, a forwarding rule at a designated network device, forwarding a loop-detect unit, via the designated network device, utilizing the received forwarding rule, and determining if the loop-detect unit is received by the designated network device. | 01-28-2016 |
| 20160065334 | Structure and Implementation Method for implementing an embedded serial data test loopback, residing directly under the device within a printed circuit board - A method and a structure with multiple implementations is provided that depends on the specific need, for placing (embedding) a serial loopback circuit of known design in a printed circuit board directly beneath the device under test. Micro-vias and traces connect components including transmitter components (TX) and receiver components (RX) that are formed into a loopback circuit for connection to a device under test (DUT). The connection is accomplished by a coupling capacitor with a shortest possible electrical length approximating a straight line between said components and said DUT and said distance is a length of said short straight line times a square root of 2 so that said receiver components are beneath the DUT. | 03-03-2016 |
| 20160072694 | SYSTEM AND METHOD FOR LOOPBACK AND NETWORK LOOP DETECTION AND ANALYSIS - A method of determining the presence of a loopback in one or more networks comprises storing information related to a test instance; sending a loopback detection beacon (LPDB) containing information related to the test instance from a port on an originating device; monitoring the port for a predetermined time period to detect LPDBs arriving at the port during the predetermined time period; and determining whether a detected LPDB contains information corresponding to the stored information, to detect the presence of a loopback. The method may determine whether a detected loopback is a port loopback, a tunnel loopback or a service loopback. The stored information related to the test instance may be deleted if an LPDB arriving at the port and containing information corresponding to the stored information is not detected within the predetermined time period. | 03-10-2016 |
| 20160080120 | ETHERNET LOOPBACK DETECTION AND SERVICE TRAFFIC BLOCKING - A method and system for Ethernet loopback detection snoops an egress frame at a UNI-N edge device and records at least one source field of the egress frame, such as a MAC address or a VLAN tag. Ingress frames at the UNI-N edge device are monitored for having the same value in the source field as the egress frame. When an ingress frame has the same source field value as the egress frame, the ingress frame is identified as a loopback frame and is dropped at the UNI-N edge device. | 03-17-2016 |
| 20160094432 | Verifying Connector Placement Via Loopback Schemas - A method and system for verification of connector placement via loopback schemas is disclosed. The method for verification of connector placement via loopback schemas applies a schema to the loopback facilities associated with the signaling pairs at a particular port, with the schema being identified at the remote end of a cable connected to the port via a connectivity test, and the resulting schema identifying the port connected thereto. The method and system for verification of connector placement via loopback schemas provides advantages over systems known in the art positively identifying a particular port while eliminating the requirement for detailed connector labeling. | 03-31-2016 |
| 20160100437 | MULTI-PROTOCOL DEVICE SUPPORTING WIRELESS PLANT PROTOCOLS - A plant wireless access point (PWAP) is disclosed that bridges communications between a field communicator and a plant automation network. The PWAP may facilitate provisioning of new plant devices into a plant automation wireless network using the field communicator, and may also facilitate the field communicator performing various functions regarding one or more plant devices connected to the plant automation network. The PWAP may allow a field communicator to access information from the plant automation network and/or from other sources via the plant automation network such as the Internet. In addition, the PWAP may determine a location of one or more field communicators relative to the PWAP and/or other devices connected to the plant automation network. | 04-07-2016 |
| 20160205006 | NODE UNIT CAPABLE OF MEASURING DELAY AND DISTRIBUTED ANTENNA SYSTEM INCLUDING THE SAME | 07-14-2016 |
| 20180026810 | DETECTING AND PREVENTING NETWORK LOOPS | 01-25-2018 |
| 20180026872 | DETECTING AND PREVENTING NETWORK LOOPS | 01-25-2018 |
