Entries |
Document | Title | Date |
20080212483 | METHOD AND APPARATUS FOR END-TO-END LINK DETECTION AND POLICY ROUTING SWITCHING - In a method for end-to-end link detection, a link state of a first network device is bound to a reliability detection mechanism session established between the first network device and a second network device, and the first network device detects the link state of the first network device and notifies the second network device of the link state of the first network device through the reliability detection mechanism session. In a method for policy routing switching, the second network device records received link state information of the first network device, configures a relation between a policy routing and a link. The second network device determines a link corresponding to a selected policy routing, and switches a policy routing according to the state of the link. Apparatuses corresponding to the methods also provided. The methods and apparatuses can implement the end-to-end link detection, and initiate switching in time. | 09-04-2008 |
20080247323 | TRANSMITTING DATA PACKETS OVER AN AIR INTERFACE - A method of transmitting data packets over an air interface is disclosed. At least a first and second stream of data packets are multiplexed, wherein a multiplexed stream of data packets is generated. The multiplexed stream of data packets is processed by a forward error correction function, wherein the forward error correction function adds redundancy bits to the multiplexed stream of data packets, wherein a third stream of data packets is generated, and wherein the redundancy bits are used for an error control to be performed on the third stream of data packets. The third stream of data packets is then transmitted over the air interface. | 10-09-2008 |
20080267077 | Real-Time Internet Error Correction - A real-time internet error correction method includes a transmitter side of a real-time internet connection adjusting it's transmitting speed periodically according to the real-time average internet error rate detected at a receiver side to reduce the quantity of packet loss. When the error rate received at transmitter side is greater than the standard set by the user, the transmitter side will automatically reduce its transmitting speed until the error rate once again fall below the standard. As a result, the method can prevent the situation when the real-time internet connection has high error rate, the transmitter side still send packets at full speed which will only result in more packet loss. Furthermore, the present invention further discloses an algorithm which can more precisely calculate the average real-time internet connection error rate. | 10-30-2008 |
20080267078 | Multicast fast reroute - A method and apparatus for fast reroute of multicast data are disclosed. In one embodiment, a method includes transmitting a multicast join message from a receiver towards a source on a primary path and transmitting an alternate multicast join message from the receiver towards the source on a backup path. Data packets are then received from the primary and backup paths. The method further includes operating in a first mode wherein the data packets received from the primary path are accepted and the data packets received from the backup path are dropped, and switching to a second mode wherein the data packets received from the backup path are accepted, upon detecting a failure in the primary path. | 10-30-2008 |
20080285469 | COMPUTER REPLACING REDUNDANT COMMUNICATION ROUTES, AND PROGRAMS AND METHOD FOR THE SAME - Computer including at least a first and a second interface coupled to a network. The first interface holds a first address, and the second interface holds the first address and a second address. The computer transmits a packet having the first address as a source address from the first interface, and transmits a packet having the second address as a source address from the second interface. When it is determined that a state of a communication route coupled to the first interface is not normal, the computer transmits a packet having the first address as a source address from the second interface. | 11-20-2008 |
20090003223 | DISCOVERING CONFIGURED TUNNELS BETWEEN NODES ON A PATH IN A DATA COMMUNICATIONS NETWORK - An apparatus and method are described for discovering a configured tunnel between nodes on a path in a data communications network. In an embodiment, an apparatus is arranged to remotely access at least one node on the path, identify whether a tunnel is configured on the access node and, if so, identify whether the identified tunnel has a fault. | 01-01-2009 |
20090010171 | Scaling BFD sessions for neighbors using physical / sub-interface relationships - In one embodiment, an apparatus includes a physical port and a plurality of logical sub-interfaces under the physical port. The physical port and the logical sub-interfaces are configured as a Bidirectional Forwarding Detection (BFD) neighbor group. The physical port being configured to run BFD sessions to detect failures at a first rate that is substantially faster as compared to a second rate of BFD sessions to detect failures on the logical sub-interfaces. The physical port notifies the logical sub-interfaces of a BFD failure at the physical port, with the logical sub-interfaces shutting down responsive to the notification. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. | 01-08-2009 |
20090022059 | Optical Cross Connect Apparatus and Network - An optical signal connection apparatus for connecting first and second optical signal transmission lines to first and second routers, respectively, is disclosed. The first and second routers are configured to handle both optical signals and electrical signals. The optical signal connection apparatus comprises a first node and a second node. The first node includes a first port that is coupled to the first router via the first optical signal transmission line, the first port being configured to handle a first type of optical signals associated with the first router, the first optical signal transmission line defining a first communication link; a first line-setting unit configured to couple the first and second nodes to enable data communication between the first and second nodes using optical signals; a first control unit to control the first line-setting unit in setting an optical communication link between the first and second nodes; and a first signal-type storage unit configured to store first information on the first type of optical signals that the first port is configured to handle. The second node includes a second port that is coupled to the second router via the second optical signal transmission line, the second port being configured to handle a second type of optical signals associated with the second router, the second optical signal transmission line defining a second communication link, wherein the first information is compared with second information on the second type of optical signal to determine whether or not the first and second communication links are compatible to each other. | 01-22-2009 |
20090034422 | ATM Protection System - A protection system for an ATM network ( | 02-05-2009 |
20090034423 | Automated detection of TCP anomalies - One embodiment relates to an automated method of detecting transmission control protocol (TCP) anomalies. A TCP connection is selected to be monitored. Packets communicated for the TCP connection are scanned in chronological order of packet communication times. A signature is created for the connection based on the scanned packets, and said signature is characterized to detect anomalous behavior of the TCP connection being monitored. Other embodiments, aspects and features are also disclosed. | 02-05-2009 |
20090059803 | HIGH RESILIENCY NETWORK INTRASTRUCTURE - A resilient interface architecture may include at least two interface switches and at least two interface routers. The at least two interface switches may provide connectivity between a subnetwork and a main network. If one of the switches fails, the connectivity otherwise provided by the failed interface switch may be provided by another one of the interface switches. Each interface router may be individually coupled to at least one interface switch. The interface routers may select a transmission path between the subnetwork and the main network through the interface switches. If one of the interface routers fails, the selection of transmission paths otherwise provided by the failed interface router may be provided by another one of the interface routers. | 03-05-2009 |
20090161561 | Method and system for determining characters of channels - The present invention relates to cis-1,2-substituted stilbene derivatives, or their pharmaceutically acceptable salts, glucosides or solvates, a pharmaceutical composition comprising the compound, and use of said compound for preparation of a drug for treatment and/or prevention of diabetes or improvement of diabetic complications. | 06-25-2009 |
20090175176 | MULTI-POINT AND ROOTED MULTI-POINT PROTECTION SWITCHING - The present invention relates to techniques for allowing one or more edge nodes in a backbone network to quickly and efficiently switch traffic delivery from a first virtual network to a second virtual network in response to a failure occurring in association with the first virtual network. In certain embodiments, an edge node is capable of independently detecting that a failure has occurred on the first virtual network and quickly transitioning from the first virtual network to the second virtual network for receiving or delivering traffic. Upon detecting the failure in the first virtual network, the edge node will begin delivering traffic over the second virtual network. If control messages are not already being provided over the second network, the edge node may begin providing the control messages over the second virtual network. | 07-09-2009 |
20090185495 | METHOD, SYSTEM OF FAULT DETECTION FOR PSEUDO WIRES AND SERVICE PROVIDER EDGE ROUTER THEREOF - The present invention discloses a method, system of fault detection for pseudo wires (PW) and a provider edge router (PE) thereof. The method includes the following. A remote PE receives, from a local PE, a first bonding relationship between a PW and an LSP of which the starting point is the local PE. After the remote PE detects a fault of the LSP, the remote PE determines a fault of the PW based on the detected fault of the LSP, a second bonding relationship between the PW and an LSP of which the starting point is the remote PE, and the received first bonding relationship, wherein the second bonding relationship is pre-configured at the remote PE. The method, system and PE of fault detection for a pseudo wire according to embodiments of the present invention can detect a fault of the PW precisely, ensuring the consistency of PW statuses detected by PEs at the two ends of the PW. | 07-23-2009 |
20090268618 | Fault Isolation System and Method - A fault isolation system and method. A hierarchical numbering system is applied to devices within a subscriber network. The number system comprises a continuously concatenated string that provides a relative location of each active device with a subscriber network. The numbering system provides “genealogical” information about network devices and their location with the network and facilitates the correlation of non-responsive CPE data with faults in network devices. | 10-29-2009 |
20090290499 | Backplane Interface Adapter with Error Control and Redundant Fabric - A backplane interface adapter with error control and redundant fabric for a high-performance network switch. The error control may be provided by an administrative module that includes a level monitor, a stripe synchronization error detector, a flow controller, and a control character presence tracker. The redundant fabric transceiver of the backplane interface adapter improves the adapter's ability to properly and consistently receive narrow input cells carrying packets of data and output wide striped cells to a switching fabric. | 11-26-2009 |
20090303886 | Method And System For Analyzing Gateways - An analysis is performed to test whether a gateway is functioning properly. The gateway includes a plurality of ports. Routing information for the gateway is received. A plurality of concurrent calls is generated for the ports of the gateway. The concurrent calls are pushed to the gateway in accordance with the routing information to determine whether the ports of the gateway are functioning properly. | 12-10-2009 |
20100034099 | ACCESS CIRCUIT TEST FOR TRANSFER ENGINEERING - A test system for testing a pair of telecommunications access networks, e.g. as part of transfer engineering. The system comprises a test head for connection, via an access arrangement, to first and second access networks. In a first phase, the access arrangement is arranged to connect the test head to the first access network for sending a first request from the tester to, for example, a CLI server via the first access network. The first request comprises a parameter associated with a user line. The tester is arranged to receive in response to the first request a first identifier from the server. In a second phase, the access arrangement is arranged to connect the test head to the second access network for sending a second request from the test head through the second access network to, for example, a CLI server. The second request also comprises the parameter. The tester is arranged to receive, in response to the second request, a second identifier from the target server and is arranged to carry out a comparison operation involving the first and second identifiers received in response to the two requests. A mismatch can indicate a fault or misconnection in either access network or a problem with network configuration data. | 02-11-2010 |
20100046381 | METHOD AND APPARATUS FOR PROCESSING OF AN ALARM RELATED TO A FRAME RELAY ENCAPSULATION FAILURE - A method and apparatus for providing automated processing of an alarm related to a frame relay encapsulation failure on a packet network, e.g., a Virtual Private Network (VPN), are disclosed. For example, the method receives an alarm or a ticket related to a network connection with a frame relay encapsulation, and correlates the ticket or said alarm with a circuit. The method determines a number of logical channels supported by the circuit between a customer edge (CE) router and a provider edge (PE) router. The method performs one or more tests from the PE router to one or more customer end device connected to the PE router through the CE router, and performs one or more tests from the PE router to one or more remote customer end devices, if all of the one or more tests from the PE router to the one or more customer end devices connected to the PE router through the CE router are successful. | 02-25-2010 |
20100074120 | Multiple Carrier Acknowledgment Signaling - Acknowledgment signaling in a multiple carrier environment is enabled with a multiple carrier codebook having code words that jointly encode acknowledgment for at least two carriers. For an example embodiment, there is a method in a remote terminal for acknowledgment uplink signaling in a multiple-carrier mode. First, a code word is determined that jointly encodes acknowledgment signaling for at least two carriers from a multiple carrier codebook that is stored in the remote terminal. The multiple carrier codebook includes eight code words that are defined to have a single carrier codebook as a sub-codebook of the multiple carrier codebook, each code word of the eight code words having a length of ten. The multiple carrier codebook achieves a minimum Hamming distance of four among the eight code words. Second, an uplink signaling message that includes the determined code word is transmitted from the remote terminal to a wireless network node. | 03-25-2010 |
20100110903 | FAULT LOCATION - The nodes ( | 05-06-2010 |
20100149996 | System and method for fast detection of communication path failures - A system and methods for reducing detection time of path failures in a communications network is disclosed. Computing devices are organized into at least three groups based on their connectivity. The computing devices are assigned three identification values based on their group assignments. The identification values for each computing device are stored in a router connected to the communications network. Heartbeat packets are sent from the computing devices to the router on a periodic basis. If the router fails to receive a heartbeat packet from a particular computing device, a communication path from the router to the computing device is determined based on the three identification values. | 06-17-2010 |
20100157815 | System and Method for Transport Independent Automated Voice Solutions - A system and method provides transport independent automated voice solutions. The method comprises receiving an indication of a network issue of a network. The network issue relates to a malfunction of a voice service provided by the network. Sub-networks of the network utilize a plurality of transmission protocols. The method further comprises determining a source of the network issue by determining a status for each of select components related to the network issue. The select components are determined by a type of the transmission protocols related to the network issue. | 06-24-2010 |
20100214932 | VPN intelligent route service control point trouble diagnostics - Systems and methods are described that analyze Layer 3 network performance between a network and its Intelligent Route Service Control Point (IRSCP) architecture to identify problems without having to disrupt customer service. | 08-26-2010 |
20100246410 | DETECTING AND MITIGATING DATA PLANE BRIDGING LOOPS - Example systems and methods associated with detecting bridging loops are described. One example apparatus includes a preliminary detection logic to detect a bridging loop in a switched network based on examining MAC moves reported by a switch in the switched network. The apparatus may also include a confirmation detection logic to confirm the bridging loop by controlling a probe to be sent into the switched network and determining that the probe looped through the switched network. The apparatus may also include a response logic to selectively control switches in the network to break the bridging loop by selectively blocking data plane traffic while allowing control plane traffic. | 09-30-2010 |
20100315955 | AUTO VPN TROUBLESHOOTING - The invention is directed to providing a method and system for automatically determining a root cause of a failure in a packet switching telecommunications network using IP/MPLS protocols and having Virtual Private Network (VPN) services such as VLL, VPLS, VPRN. | 12-16-2010 |
20110026410 | System and Method for Comparing Packet Traces for Failed and Successful Communications - The system and method get a packet trace for a failed communication and a packet trace for a successful communication. The two packet traces are generated with packets from a common protocol(s) shared by the two communications. The failed and successful communications have at least some network elements in common. A field(s) in the common protocol(s) is identified. The field(s) is updated to be the same in both packet traces. The two packet traces are then compared to produce a list of remaining differences that can be used to diagnose problems in the failed communication. The list can also be compared to bills of materials for the failed and successful communications to further enhance diagnosis of the failed communication. | 02-03-2011 |
20110069618 | Circuit-switched services over LTE - A mobile radio communication system and method of initiating a circuit-switched service at a mobile station over a System Architecture Evolution (SAE) core network using packet-switched communications between the mobile station and the SAE core network is provided. The method includes communicating service handling information between a Mobile Switching Centre (MSC) and the mobile station through a Mobility Management Entity (MME) of the SAE core network; sending instructions from the MSC for setting up the circuit-switched service through a Media Gateway, coupled to at least one network external to the SAE core network; providing packet-switched addressing information for the Media Gateway to the mobile station; and initiating the circuit-switched service at the mobile station over the SAE core network and through the Media Gateway. | 03-24-2011 |
20110228682 | COMMUNICATION NETWORK MANAGEMENT SYSTEM, METHOD AND PROGRAM, AND MANAGEMENT COMPUTER - A communication network includes a plurality of nodes and a plurality of links connecting between the nodes. A management computer managing the communication network has a storage means, an entry control means and a monitoring means. A route information indicating a transfer route of frames in the communication network is stored in the storage means. The monitoring means performs, based on the route information, transmission and reception of frames to and from the communication network. The entry control means instructs each node to set up a forwarding table indicating a correspondence relationship between an input source and a forwarding destination of frames. More specifically, the entry control means instructs the each node to set up the forwarding table such that frames are forwarded along the transfer route indicated by the route information. | 09-22-2011 |
20110235528 | FAIR CONGESTION DETECTION FOR TRANSPORT NETWORK LAYER WCDMA COMMUNICATIONS - Congestion is detected in a radio access transport network including one or more radio network controllers each coupled to one or more radio base stations. Multiple data packet flows are each associated with a mobile radio terminal communication, and each flow is controlled in the radio access transport network by a corresponding flow control entity. They are monitored for congestion in the transport network. If a congestion area in the transport network is detected for one of the monitored data packet flows, then a determination is made whether other monitored data packet flows share the detected congestion area. Congestion notification information is communicated to the flow control entities corresponding to the other monitored data packet flows that share the detected congestion area. Based on the congestion notification information, the informed flow control entities may take a flow control action, e.g., to enable fair sharing of communications resources in the transport network. | 09-29-2011 |
20110255421 | INVESTIGATING QUALITY OF SERVICE DISRUPTIONS IN MULTICAST FORWARDING TREES - Methods, computer-readable storage media and systems may be provided for investigating a Quality of Service (“QoS”) disruption among nodes of a computer network that form a multicast forwarding tree. A topology of the multicast forwarding tree may be identified. Performance data may be collected at interfaces between nodes of the multicast forwarding tree. A source of the QoS disruption may be identified by mapping the performance data to the topology. | 10-20-2011 |
20110292813 | Faults Propagation and Protection for Connection Oriented Data Paths in Packet Networks - A communications network comprising components configured to implement a method comprising analyzing a path between a first end point and a second end point, and identifying a partial fault along the path is disclosed. Also disclosed is a method for communicating information within a network, the method comprising: defining a path traversing a plurality of nodes, receiving a fault report from an intermediate node, determining whether the fault report affects the path, and responsive to the determination that the fault report affects the path, transmitting the fault report to an upstream or downstream node in the path. | 12-01-2011 |
20120002555 | MOBILE STATION APPARATUS, BASE STATION APPARATUS, INTEGRATED CIRCUIT, AND METHOD OF DETECTING RANDOM ACCESS PROBLEMS - A method of detecting random access problems in a mobile station apparatus which uses multiple component carriers to perform random access. To achieve this, the mobile station apparatus, which is in a mobile communication system comprised of a base station apparatus and mobile station apparatuses, uses one random access channel transmission counter to detect random access problems in the plurality of component carriers. | 01-05-2012 |
20120039184 | NETWORK SYSTEM, LAYER 2 SWITCH, AND METHOD OF DETECTING OCCURRENCE OF A FAULT IN A NETWORK - A network system comprises a first communication device being set up with a first address; and a second communication device connected with the first communication device via a network and being set up with a second address, wherein the first communication device includes a monitor frame transmitter configured to generate a monitor frame including the second address as a destination address and the first address as a source address, and to output the generated monitor frame to the network; and a monitoring-response frame monitor configured to monitor reception of a monitoring-response frame sent back from the second communication device, wherein the second communication device includes: a monitoring-response frame transmitter configured to, in response to reception of the monitor frame, generate the monitoring-response frame by exchanging the destination address in the received monitor frame for a source address and the source address in the received monitor frame for a destination address, and output the generated monitoring-response frame to the network. | 02-16-2012 |
20120063328 | WIRELESS COMMUNICATION DEVICE AND DATA RECEPTION METHOD - The present disclosure eliminates the need for a buffer large enough to store a MAC PDU for the CRC check and eliminates processing delay involved in outputting data to, and inputting data from, the buffer. A wireless communication device analyzes and buffers an RLC data PDU, which is a data processing unit in the Radio Link Control layer (RLC layer), in the RLC layer without waiting for the completion of error detection processing, which is performed in the Medium Access Control layer (MAC layer), for a data processing unit (PDU) in the MAC layer. In the RLC layer, the wireless communication device references the result of the error detection processing for the MAC PDU performed in the MAC layer and creates an RLC Service Data Unit (RLC SDU) using an error-free RLC data PDU. | 03-15-2012 |
20120082038 | ENABLING COEXISTENCE BETWEEN FDD AND TDD WIRELESS NETWORKS - Systems and methods for detecting and mitigating interference between from a wireless time division duplex (TDD) communications device and a wireless frequency division duplex (FDD) communications device includes processing quality-indicator reports received from the FDD device to determine if the FDD device has experienced interference from the TDD device. Such interference may be mitigated by adjusting a downlink configuration of the FDD base station in communication with the FDD device. To detect and mitigate interference from an FDD device to a TDD device, it is determined if a monitored value of an operational parameter of the FDD device is within a fixed range of a maximum value of the operational parameter, and if so, a specific time interval or frequency of the FDD device is assigned for communication purposes. Similar interference detection and mitigation techniques may also be used for interference scenarios between two TDD systems including TDD devices. | 04-05-2012 |
20120106359 | HEALTH PROBING DETECTION AND ENHANCEMENT FOR TRAFFIC ENGINEERING LABEL SWITCHED PATHS - A method performed by a network device may include establishing performance-based Bidirectional Forwarding Detection (BFD) sessions for each link of a primary traffic engineering Label Switched Path (TE-LSP) and establishing performance-based BFD sessions for each link of a secondary TE-LSP. The method may also include, monitoring performance of the primary TE-LSP based on the performance-based BFD sessions for each link of the primary TE-LSP and monitoring performance of the secondary TE-LSP based on the performance-based BFD sessions for each link of the secondary TE-LSP. The method may further include determining that the performance of the primary TE-LSP is degraded based on the monitoring of the performance of the primary TE-LSP and automatically switching a flow of data unit traffic from the primary TE-LSP to the secondary TE-LSP when the performance of the primary TE-LSP is degraded. | 05-03-2012 |
20120120811 | TRANSITIVE PROBING FOR FAILURE DETECTION OF NETWORK INTERFACES - The method involves issuing, by an active interface, an Internet Protocol probe packet (IPPP) to a probe target, issuing, by a first alternate interface, a first transitive probe packet (TPP) to the active interface, where the first alternate interface and the active interface belong to a broadcast domain. The method further involves awaiting, by the active interface, a responsive IPPP from the probe target, awaiting, by the first alternate interface, a first responsive TPP from the active interface, and determining network conditions based upon receiving at least one of the responsive IPPP and the first responsive TPP. | 05-17-2012 |
20120127868 | Method and System for Joint Detection of Ethernet Part Segment Protection - The present invention discloses a method for detection of Ethernet segment protection, and this method includes: configuring a detection point in two segment protection domains with a shared link; configuring a joint monitor group on the shared link of said two segment protection domains; and judging whether the configured detection point and the joint monitor group receive a Continuity Check Message (CCM) in a certain period, if the CCM message is received, determining a detected segment corresponding to this CCM message is normal; if the CCM message is not received, determining the detected segment corresponding to this CCM message has a fault. The present invention further discloses a system for detection of Ethernet segment protection, including: a detection point configuration unit, a joint monitor group configuration unit and a judgment unit. The method and system of the present invention can solve the problem of the segment protection in the case of the multi-node fault and greatly improve the network performance. | 05-24-2012 |
20120134278 | Method, system and signaling gateway for enabling message intercommunication between GSM and CDMA - The disclosure discloses a method, a system and a signaling gateway for enabling message intercommunication between a Global System for Mobile Communications (GSM) network and a Code Division Multiple Access (CDMA) network. The method comprises: setting a GSM-CDMA (GC) signaling gateway in a service processor of a CDMA short message service center; during processing a message from the GSM network to the CDMA network, a GSM short message service center sending a mobile terminated request message to the GC signaling gateway, and the GC signaling gateway converting a GSM message into a CDMA message according to the mobile terminated request message and sending the converted CDMA message to a target CDMA subscriber; and, during processing a message from the CDMA network to the GSM network, a CDMA service processor converting a CDMA message into a GSM message and sending the converted GSM message to a target GSM subscriber. The disclosure enables service control more flexible and function extension more convenient by using the service processor to enable GC intercommunication via the NO. 7 signaling. | 05-31-2012 |
20120147757 | Method, System and Apparatus for Diagnosing Physical Downlink Failure - The present invention discloses a method for diagnosing a physical downlink failure so as to solve the problem in the existing technology of being unable to report information accurately when the physical downlink failure occurs thereby influencing the diagnosis of the physical downlink failure. The method comprises: when a remote device detects the physical downlink failure, determining a code corresponding to information required to be reported based on a stored corresponding relationship between the information and the code; the remote device generating a control signal from the determined code based on an appointed frequency clock; and the remote device reporting a signal corresponding to the control signal to a near-end device through a physical uplink such that the near-end device diagnoses the physical downlink failure according to the reported signal. | 06-14-2012 |
20120182881 | Routing Protocols for Power Line Communications (PLC) - Systems and methods for routing protocols for power line communications (PLC) are described. In some embodiments, a method may include transmitting a one-hop broadcast request message to a plurality of PLC devices in a mesh network and receiving a response from each of the devices. The method may also include selecting one of the devices as a bootstrapping agent, sending a join request to a bootstrapping server through the bootstrapping agent, and, in response to successfully joining the network, setting the bootstrapping agent as a next hop toward a bootstrapping server. In another embodiment, a method may include maintaining a routing table for a plurality of PLC devices in a mesh network, receiving a join request from a PLC device, accepting the request, and updating the table to add a record corresponding to the PLC device; the record setting the bootstrapping agent as a penultimate hop toward the PLC device. | 07-19-2012 |
20120224493 | SYSTEM AND METHOD FOR SQUELCHING A RECOVERED CLOCK IN AN ETHERNET NETWORK - A system and method for squelching a recovered clock in an Ethernet network. In one embodiment the invention provides a method for squelching a recovered clock in an Ethernet network comprising a local node coupled to a remote node by a link, the method including receiving a descrambler status signal, receiving a remote receiver status signal, receiving a link status signal, and squelching the recovered clock signal based on the descrambler status signal, the remote receiver status signal, and the link status signal. | 09-06-2012 |
20120224494 | TRANSMISSION SYSTEM, TRANSMISSION METHOD, AND COMMUNICATION DEVICE - A transmission system includes a transmission device and a reception device connected with each other via two lines. When the transmission device switches a line, used for transmitting VLAN traffic, from a first line to a second line, the transmission device transmits the VLAN traffic to the second line by switching the line after transmitting a post-switching message to the first line. The reception device includes a first buffer which stores the VLAN traffic received from the first line and a second buffer which stores the VLAN traffic received from the second line. When the reception device receives the post-switching message from the first line, the reception device starts reading of the VLAN traffic from the second buffer after reading the entire VLAN traffic stored in the first buffer. | 09-06-2012 |
20120236730 | METHOD, DEVICE AND SYSTEM FOR PROCESSING SERVICE TRAFFIC BASED ON PSEUDO WIRES - The embodiment of the present invention relates to a method, device and system for processing service traffic based on pseudo wires, wherein the method includes: receiving service traffic from a customer edge device ( | 09-20-2012 |
20120300643 | Method for Detecting Video Tiling - A method for detecting errors on an audio/video (A/V) data stream in a data service network includes providing multicast components operably coupled to each other via respective links for transmitting the A/V data stream to a user and for defining at least one multicast tree. The method further includes generating a state information signal indicative of a number of errors on the A/V data stream for at least one of the links and at least one of the plurality of multicast components. The method further includes determining the cumulative number of errors on the A/V data stream that are indicative of the number of errors for the at least one of the links and the at least one of the plurality of multicast components in the multicast tree in response to the state information signal. | 11-29-2012 |
20120307651 | PROTOCOL FREE TESTING OF A FABRIC SWITCH - A switch fabric for a modular router may be tested without connecting the switch fabric portion of the router to the other modular portions of the router. The switch fabric may generate test data units and insert the test data units into one or more elements of the switch fabric. The switch fabric may operate with the inserted test data units. A control component may receive data units from the switch fabric after operation of the switch fabric and analyze the received data units to determine whether the received data units correspond to the inserted test data units. | 12-06-2012 |
20130021922 | NETWORK MANAGING DEVICE AND NETWORK MANAGING METHOD - An initial address allocating unit | 01-24-2013 |
20130064102 | VIRTUAL CHASSIS SYSTEM CONTROL PROTOCOLS - A virtual chassis system includes a plurality of network nodes configured with a master virtual chassis address. The network nodes are connected by virtual fabric link (VFLs) that provide a connection for exchange of data packets between the network nodes. The data packets include source MAC addresses and associated hardware device information, such as source chassis ID, source network interface identifier and source port identifier information. The network nodes use this information to maintain synchronized MAC address tables for forwarding of data packets in the virtual chassis system. One or more control protocols in the network node are used for topology discovery, master network node election, generation of routing tables, health monitoring and other functions. | 03-14-2013 |
20130107724 | QUICK ADVERTISEMENT OF A FAILURE OF A NETWORK CELLULAR ROUTER | 05-02-2013 |
20130176863 | METHOD AND APPARATUS FOR PROVIDING AUTOMATED PROCESSING OF A SWITCHED VOICE SERVICE ALARM - A method and apparatus for providing automated processing of a switched voice alarm on a switched and/or Internet Protocol (IP) network are disclosed. For example, the method receives an alarm associated with a switched voice service, and retrieves a Local Routing Number (LRN) or Primary Inter-exchange Carrier (PIC) information from a switch serving a call associated with a caller's telephone number. The method determines if the alarm is due to one or more service degradations, and notifies a work center responsible for one or more of the service degradations if the alarm is due to the one or more service degradations. | 07-11-2013 |
20130182581 | IP MULTICAST OVER MULTI-CHASSIS TRUNK - In embodiments of the present invention, multicast traffic is simultaneously routed via all switches participating in the trunk (can be referred to as partner switches). A respective partner switch synchronizes the local multicast state information with all other partner switches. For a respective multicast group, a plurality of partner switches can be the part of the corresponding multicast distribution tree and obtain multicast traffic from uplink sources. For the multicast group, only one partner switch is elected as the primary forwarder which forwards the multicast traffic via the trunk. Another partner switch can become the primary forwarder for the multicast traffic of another multicast group and provide load sharing of multicast traffic between partner switches. Furthermore, because the partner switches have the multicast traffic and state readily available, in the event of a switch or link failure to the primary forwarder, another partner switch can readily become the primary forwarder. | 07-18-2013 |
20130229924 | CFM FOR CONFLICTING MAC ADDRESS NOTIFICATION - In one embodiment, an aggregation device is configured to aggregate traffic of a plurality of customer edge (CE) devices into a single bridge-domain. The aggregation device receives connectivity fault management (CFM) packets of a CFM protocol from the plurality of CE devices. Each received CFM packet includes a media access control (MAC) address of an access port of the CE device from which the CFM packet was transmitted. The aggregation device detects conflicting MAC addresses between access ports of CE devices by comparing MAC addresses of the received CFM packets. The aggregation device notifies one or more of the plurality of CE devices of the conflict. | 09-05-2013 |
20130242757 | INTERCONNECTING SEGMENTED LAYER TWO NETWORK FOR CLOUD SWITCHING - In one embodiment, a layer-2 network that includes a cloud switch is partitioned into a plurality of segments, each segment including one or more cloud switch domains that are coupled via a logical port to a corresponding one of a plurality of internal logical shared media links. One of the internal logical shared media links is provisioned as a hub. One or more remaining internal logical shared media links are defaulted to be spokes. A spanning tree protocol (STP) is executed within each segment. The logical port of each cloud switch domain advertises a pseudo root bridge identifier (ID) to cause the internal logical shared media link to appear attached to a Root. The advertised pseudo root bridge ID of the hub is chosen to have a higher priority than the pseudo root bridge ID of the spokes to establish a hub and spoke relationship among the segments. | 09-19-2013 |
20130286856 | HOST-ROUTER VIRTUAL TUNNELLING AND MULTIPLE TUNNEL MANAGEMENT - A virtual tunnel method is described herein which implemented by a host and next hop routers to address a problem that is related to synchronizing active tunnel(s) and active link(s) between the host and next hop routers. Furthermore, a multiple tunnel management method is described herein which implemented by a host to address the problem that is related to synchronizing active tunnel(s) and active link(s) between the host and multiple next hop routers. | 10-31-2013 |
20130286857 | DIAGNOSING NETWORK PROBLEMS IN AN IPV6 DUAL STACK NETWORK - Embodiments of the present invention are directed to diagnosing problems in a dual stack network supporting Internet Protocol Version Six (IPV6). Inventoried information can be retrieved from an inventory system in response to a problem associated the dual stack network. It can be determined whether a mismatch exists between live customer address information associated with a customer edge router and the inventoried information. A notification can be generated in response to determining whether a mismatch exists. The notification includes information representing a cause of the problem and resolution of the problem. | 10-31-2013 |
20130286858 | MANAGEABILITY TOOLS FOR LOSSLESS NETWORKS - Manageability tools are provided for allowing an administrator to have better control over switches in a lossless network of switches. These tools provide the ability to detect slow drain and congestion bottlenecks, detect stuck virtual channels and loss of credits, while hold times on edge ASICs to be different from hold times encore ASICs, and mitigate severe latency bottlenecks. | 10-31-2013 |
20130286859 | FAULT DETECTION METHOD AND SYSTEM - Embodiments of the present invention provide a fault detection method and system. The method includes: sending port scan packets based on at least two port pairs to a destination end, where each port pair includes a source port number and a destination port number and corresponds to a path between a source end and the destination end; receiving a response packet sent by the destination end, where the response packet carries a port pair which does not receive a port scan packet; and based on the port pair, determining a faulty path. Based on the embodiments of the present invention, port scan packets are sent based on multiple port pairs, so that the port scan packets can reach the destination end through multiple paths, so as to detect multiple paths between the source end and the destination end. The present invention can implement more efficient fault detection. | 10-31-2013 |
20130294258 | METHODS, APPARATUS AND ARTICLES OF MANUFACTURE TO MONITOR COMMUNICATION PATHS IN COMMUNICATION SYSTEMS - Example methods, apparatus and articles of manufacture to monitor communication paths in communication systems are disclosed. An example method includes identifying links of a communication system, the links communicatively coupling router pairs, identifying communication paths in the communication system, each of the communication paths being routed via one or more of the links, testing the links during a first interval by testing at least a first portion of the communication paths, testing the links during the second interval by testing at least a second portion of the communication paths, changing the first portion of the communication paths to include at least one of the communication paths from the second portion of the communication paths such that testing the first portion of the communication paths and testing the second portion of the communication paths collectively test each of the links, and identifying a link failure based on the testing. | 11-07-2013 |
20130322263 | METHOD AND APPARATUS FOR DETECTING A NETWORK IMPAIRMENT USING CALL DETAIL RECORDS - A method and system for monitoring a packet network by using call detail records (CDRs) are disclosed. The method first receives at least one call detail record (CDR) at a completion of a call from at least one voice gateway router that serviced said call and analyzes said at least one CDR. The method then monitors at least one performance parameter in accordance with said at least one CDR. | 12-05-2013 |
20130329571 | FAILURE ANALYSIS DEVICE, AND SYSTEM AND METHOD FOR SAME - Conventional network tomography techniques do not allow the location or cause of a failure to be specified, and false positives are common due to lack of information. Using aggregation flow mining (AFM) or a similar method, an IMF ( | 12-12-2013 |
20130329572 | MISDIRECTED PACKET STATISTICS COLLECTION AND ANALYSIS - There are disclosed methods and apparatus for testing a network. One or more source port units may transmit packets, each packet including a packet group identifier (PGID) that identifies one or more of a plurality of destination port units as expected destinations of the packet. The plurality of destination port units may receive the packets from the network. Each destination port unit may extract the PGID from each received packet, accumulate receive statistics for at least a range of PGID values, and store accumulate receive statistics in a receive statistics memory. Misdirected packet statistics may be reported by retrieving, from the receive statistics memory of at least one destination port unit, receive statistics for at least some PGIDs for which the respective destination port unit is not an expected destination, and aggregating the retrieved receive statistics to generate the misdirected packet statistics. | 12-12-2013 |
20130343202 | ACCESS POINT SYNCHRONIZATION IN WI-FI FIRE DETECTION SYSTEMS - Systems and methods of backup battery support for switches and access points in fire detection systems are provided. Methods can include identifying a communications time interval for a plurality of devices, detecting a power failure, identifying a start time for a next scheduled communications time interval for a respective one of the plurality of devices, placing a wireless access point in a low power mode, and, substantially immediately prior to the start time, removing the wireless access point from the low power mode. | 12-26-2013 |
20130343203 | METHOD AND APPARATUS FOR PROVIDING END-TO-END CALL COMPLETION STATUS - The present invention enables a method for following the state of a call and generating defects as function of call completion success as opposed to discrete events that happen at individual network elements during the call. In one embodiment, the invention uses Call Detail Records (CDR) to analyze the end-to-end completion status to measure per call basis defects instead of using defect codes generated by network elements on a per equipment basis. CDR is data associated with a telephone call, including the calling and the called numbers, the date and timestamp, the duration, the call setup delay, and the final handling code of the telephone call. | 12-26-2013 |
20140010092 | PERVASIVE NETWORK DIAGNOSTICS USING HBAS - Specially configured host bus adaptors (HBAs) are located in the switches in the fabric or added to a management server. The HBAs are programmed to perform higher level protocol analysis, such as monitoring exchanges, LUNs, and VM/LUN/LBA ranges and developing SCSI statistics on the flows. The HBA can detect protocol exceptions. When located in the switches, mirroring of the desired frames is simplified as all routing is handled internally to the switch, with the HBA/switch combination providing data over the management Ethernet port to a management server. To maintain performance, preferably only the protocol relevant frames are mirrored to the HBAs. With the data provided from the HBAs, in conjunction with the normal diagnostic and statistics data available from the switch itself, the management server can correlate events end-to-end, correlate I/O error statistics collected from the fabric with server statistics, and correlate performance statistics collected from the fabric with server statistics. | 01-09-2014 |
20140022912 | FLEXRAY COMMUNICATIONS USING ETHERNET - Systems and methods for implementing FlexRay communications between FlexRay nodes using Ethernet are provided. An Ethernet switch includes ports, each of which receives an Ethernet data packet (EDP) from a respective FlexRay node. Each EDP includes a FlexRay message, which includes at least one of a data frame and a frame identification (ID). A first EDP is received at a first port no later than a second EDP is received at a second port. The Ethernet switch also includes a controller module that determines whether the second EDP has higher priority than the first EDP based on the frame IDs associated with the first and second EDPs. The controller module is configured to route the second EDP to a second destination no later than routing the first EDP to a first destination and meet FlexRay transmission cycle times when it has been determined that the second EDP has higher priority. | 01-23-2014 |
20140022913 | FAULT DIAGNOSIS DEVICE FOR MULTIPLEXER - The fault diagnosis device is for a multiplexer having inner channels selectable by a selection signal. At least two of the inner channels are assigned with input channels. Two of the inner channels in a mutually exclusive relationship are assigned with first and second diagnostic channels. Input voltages of the first and second diagnostic channels are applied with first and second diagnostic voltages, respectively. The fault diagnostic device includes a voltage detection section configured to detect a first detection voltage appearing at the output channel when the first diagnostic channel is selected and a second detection voltage appearing at the output channel when the second diagnostic channel is selected, and a diagnosis section configured to determine that the multiplexer is faulty upon detecting that the first detection voltage is different from the first diagnostic voltage or the second detection voltage is different from the second diagnostic voltage. | 01-23-2014 |
20140029443 | INTERPROVIDER VIRTUAL PRIVATE NETWORK PATH IDENTIFICATION - An inter-provider virtual provider network path is identified by identifying a provider network provider edge router having a provider edge interface serving, obtaining routing information from the provider edge router, identifying, from the routing information, a remote customer edge interface of a customer edge router connected to the provider edge router by an intermediate service provider, and identifying the path and associated links between the identified provider edge interface and the identified remote customer edge interface. | 01-30-2014 |
20140029444 | TROUBLESHOOTING CLIENT ROAMING - In an example embodiment, a service that analyzes location information of a client as the client roams. For example, whenever a trigger event occurs, such as a change in the association state, a change in Internet Protocol (IP) address, etc., a determination is made whether the event was expected. If the event was not expected, the location of where the trigger event occurred can be determined enabling a network administrator to investigate roaming problems at a particular location. | 01-30-2014 |
20140043983 | SERVICE PROBLEM DIAGNOSIS FOR MOBILE WIRELESS NETWORKS - A method for determining location of a failure causing degradation of a service in a mobile communications network is disclosed. Service trajectories for the mobile terminals are determined ( | 02-13-2014 |
20140133314 | FORENSICS FOR NETWORK SWITCHING DIAGNOSIS - A method for diagnosing performance of a network switch device includes a processor monitoring data generated by a sensor associated with a network switch device, the data related to states or attributes of the network switch device. The processor detects a determined condition in the operation of the network switch device related to the state or attribute. The processor generates an event trigger in response to detecting the determined condition and executes a forensic command in response to the event trigger. Executing the command includes sending information relevant to the determined condition for aggregation in computer storage and for analysis. | 05-15-2014 |
20140133315 | SYSTEMS AND METHODS FOR LISTENING POLICIES FOR VIRTUAL SERVERS OF APPLIANCE - The present invention is directed towards a method for using a listening policy for a virtual server on an intermediary device. An intermediary device establishes for a first virtual server a first listening policy with an expression for evaluating packets received by the intermediary device to determine whether the packet may access the first virtual server. The intermediary device listens for packets at a first internet protocol (IP) address and a first port specified for the first virtual server. Then, the intermediary device evaluates the expression of the first listening policy to a first packet received at the first IP address and first port and determines whether to provide the first packet to the first virtual server based on a result of the evaluation. | 05-15-2014 |
20140140220 | PACKET SWITCH MODULES FOR COMPUTER NETWORKS WITH EFFICIENT MANAGEMENT OF DATABASES USED IN FORWARDING OF NETWORK TRAFFIC - In a packet switch with databases ( | 05-22-2014 |
20140160943 | DATA ACQUISITION - A data acquisition system can include a central controller to provide a data acquisition system signal. The data acquisition system can also include a cabinet to receive the data acquisition system signal. The cabinet can have an array of modules installed therein. The cabinet can include a backplane connected to each module of the array of modules. The backplane can provide a status request signal to a given module in the array of modules if the given module is assigned a module address identified by the data acquisition system signal. The given module can provide status data characterizing an operational status of the given module in response to the status request. | 06-12-2014 |
20140185461 | SYSTEMS AND METHODS FOR REDUCING INFORMATION LOSS IN AN AGGREGATED INFORMATION HANDLING SYSTEM - An information handling system is provided. The information handling system includes at least one server, that includes a plurality of ports, wherein information is transmitted to and from the at least one server on the plurality of ports, and a memory storing a table, the table storing a status indication and port on which the status indication was received. The information handling system also includes a plurality of switches coupled to the at least one server to form a link aggregation group (LAG), the plurality of switches transmitting information including the status indication to the at least one server. If the server receives more than one status indication having a master status, the at least one server is configured to stop forwarding information on at least one port on which information including a master status indication has been received after previously receiving information that did not include a master status indication. | 07-03-2014 |
20140185462 | TROUBLESHOOTING METHOD AND APPARATUS - A troubleshooting method includes sending a forward detection message to at least one node on a path to be detected. The forward detection message carries information about a forward path to be detected and information about a backward path to be detected. Faults are detected according to a backward detection message returned by the at least one node. | 07-03-2014 |
20140198666 | DATA TRANSFER METHOD AND NODE APPARATUS THAT USES THE SAME - A node apparatus is provided that determines, according to the route stability indicator of the frame, whether to perform a process of judging whether the frame identification information to identify the frame is stored in a memory as the frame identification information, makes an update, only when a result of the judgment indicates a judgment is to be made on whether the frame identification information to identify the frame is stored in the memory as the frame identification information, the transmission possibility information stored in the memory such that the possibility of transmission to the node apparatus identified by the transmission-destination-node identification information indicates “not transmittable”, and selects, as a transmission-destination node apparatus, one adjacent node apparatus from the plurality of node apparatuses according to the transmission possibility information stored in the memory in association with the ultimate destination of the frame. | 07-17-2014 |
20140204768 | METHOD AND NETWORK DEVICE FOR LOOP DETECTION - A method for loop detection and a network device applying such method are provided. The method includes: receiving, by a port, a loop detection frame; detecting, by a loop detection unit, whether the loop detection frame is transmitted via a port of the network device; analyzing, by a frame analyzer unit, the loop detection frame when the loop detection frame is transmitted via the port, and determining whether there is any loop in the network device; and shutting down the port of the network device or not perform any action, by a port switching unit when the frame analyzer unit determines that there is a loop in the network device, wherein the loop detection frame is a loop detection protocol data unit (LDPDU) frame. | 07-24-2014 |
20140211637 | SYSTEM AND METHOD FOR RAPID PEER NODE FAILURE DETECTION - A system and method for rapid peer node failure detection including a network switching unit that includes a network processing unit configured to receive and forward network traffic using one or more ports, a host CPU coupled to the network processing unit and configured to manage the network processing unit, a link controller coupled to the host CPU and configured to couple the network switching unit to a peer network switching unit using a management link, and a baseboard management controller (BMC) coupled to the host CPU and the link controller. The link controller is separate and independent from the network processing unit. The BMC is configured to monitor the host CPU and the network switching unit, detect a failure in the network switching unit, and notify the peer network switching unit of the detected failure using the management link. | 07-31-2014 |
20140241172 | METHODS AND APPARATUS FOR REDUCING CALL DROP RATE - Methods and apparatus for reducing voice call drop rate are disclosed. Existing devices do not account for the added burden of background services on voice calls. Specifically, multi-RAB scenarios (e.g., a voice call and background services) can experience significant reduction in call quality. Accordingly, in one exemplary embodiment, background services that are not time-critical and/or application-critical can be suspended while a voice call is in progress. By suspending background traffic during a call, the device can avoid unnecessary multi-RAB voice call operation, which significantly improves overall network operation and user experience. | 08-28-2014 |
20140269347 | METHODS, SYSTEMS, AND COMPUTER READABLE MEDIA FOR ASSISTING WITH THE DEBUGGING OF CONDITIONS ASSOCIATED WITH THE PROCESSING OF TEST PACKETS BY A DEVICE UNDER TEST - Methods, systems, and computer readable media for assisting with debugging of conditions associated with the processing of test packets by a device under test are disclosed. One method includes transmitting test packets to a device under test. The method further includes receiving at least some of the test packets from the device under test. The method further includes storing information regarding the transmitted packets and the received packets. The method further includes applying rules to the stored information to determine correlations between packet conditions and packet parameters. The method further includes determining at least one cause of the packet condition based on the correlations. The method further includes outputting an indication of the at least one cause of the packet condition. | 09-18-2014 |
20140362708 | EMERGENCY COMMUNICATION SOLUTION - A communication system for emergency communication comprises a communication server to establish an IP based voice communication between an endpoint and a monitoring center. In one implementation, the system establishes an emergency call using an emergency communication system comprising a communication endpoint, a communication interface and a monitoring center comprising an automation system and a communication server to establish an IP based voice communication. The system initiates the emergency call at the endpoint location using the communication interface, establishes an IP based voice communication between the endpoint and the monitoring center via the communication server, and automatically sends a message from the communication server to the automation system when the call is initiated. | 12-11-2014 |
20150016277 | INTERCONNECT ERROR NOTIFICATION SYSTEM - A IHS network includes a first switch having first switch ports and a respective visual port indicator associated with each of the first switch ports. A second switch having second switch ports is included in the IHS network, and at least one interconnect connects one of the second switch ports to one of the first switch ports on the first switch. A fabric manager is coupled to the IHS network and operable to communicate with the first switch and the second switch to determine that one of the first switch ports on the first switch is that associated with a fabric interconnect error. The fabric manager then communicates with the first switch to cause the respective visual first switch port indicator that is associated with the one of the first switch ports that is associated with the fabric interconnect error to visually indicate the fabric interconnect error. | 01-15-2015 |
20150023183 | USING DISCOVERABLE PEER-TO-PEER SERVICES TO ALLOW REMOTE ONBOARDING OF HEADLESS DEVICES OVER A WI-FI NETWORK - The disclosure relates to using discoverable peer-to-peer (P2P) services to remotely “onboard” headless devices over a Wi-Fi network. In particular, an onboardee device may enter an onboarding mode in which the onboardee device becomes a Wi-Fi access point (AP) and an onboarder device connected to a private Wi-Fi network may discover the onboardee device and establish a secured session to engage with the P2P services running thereon. The first time that the onboarder device and the onboardee device engage with one another, the secured session may be established based on a key exchange that uses a well-known secret (e.g., a default passphrase), which may be immediately changed to a shared secret. The onboarder device may then transfer an onboarding configuration to the onboardee device, which may be instructed to validate the onboarding configuration and connect to the Wi-Fi network prior to entering the connected mode. | 01-22-2015 |
20150098343 | 128 Gigabit Fibre Channel Speed Negotiation - The FC port state machine enhanced by determining if various lanes are configured to be operated in 128 Gbps mode by operating as parallel lanes as indicated by using a reserved bit in a link training field. If so and if all of the ports are 32 Gbps ports and pass training, then four lanes can be combined to form a 128 Gbps link. If the ports are configured for 128 Gbps only operation and at least one lane does not negotiate to 32 Gbps or fails training, the link is not activated and none of the lanes are activated. If the ports are configured to do either 128 Gbps or independent operation and at least one lane cannot operate at 128 Gbps, then the lanes operate independently at the negotiated and trained speed. If the lanes are configured for only independent operation the transceiver develops independent links as negotiated. | 04-09-2015 |
20150103674 | NETWORK LOOP PREVENTION - Systems, methods and computer readable media for network loop detection and prevention are described. Some implementations can include a computerized method comprising detecting, at a first switch, a loop condition in a network, and generating, at the first switch, a localize loop message having an instance count and a path list. The method can also include setting, at the first switch, the instance count of the localize loop message to a first value, and transmitting, from the first switch, the localize loop message to a second switch. The method can further include detecting, at the second switch, a loop in the network; and sending, from the second switch, a localize loop response message to the first switch. | 04-16-2015 |
20150138992 | BASE STATION ANTENNA BEAM FORMING BASED JAMMING DETECTION AND MITIGATION - A method, computer-readable storage device and apparatus for locating a source of a communication impairment are disclosed. For example, the method detects the communication impairment at a base station, performs a sweep to locate a direction of the source of the communication impairment, wherein the sweep is performed in response to the detecting the communication impairment at the base station, and generates a null in the direction of the source of the communication impairment. | 05-21-2015 |
20150304244 | Using SerDes Loopbacks for Low Latency Functional Modes With Full Monitoring Capability - An apparatus comprising high speed ports connected via an integrated high speed serial switch fabric and serializer/deserializer circuits to an internal processing logic, wherein said high speed serial switch fabric is adapted to switch a serial reception signal received by a high speed port to at least one other high speed port of said apparatus and/or to the serializer/deserializer circuit of the receiving high speed port. | 10-22-2015 |
20150312132 | METHOD TO CHECK HEALTH OF AUTOMATICALLY DISCOVERED CONTROLLERS IN SOFTWARE DEFINED NETWORKS (SDNs) - A method to check health of automatically discovered controllers comprises the steps of: (a) a first controller generating a first Controller-Advertisement message carrying the information required to identify and access the first controller when a new switch port becomes active; (b) the first controller sending the generated first Controller-Advertisement to a first switch having the newly activated port; (c) the first controller receiving at least a second Controller-Advertisement message from at least a second controller; (d) the first controller generating a third unsolicited Controller-Advertisement message with its access information to check health of the second controller; (e) the first controller receiving at least a fourth Controller-Advertisement message from the second controller indicating health information of the second controller, wherein the health information is stored in first controller's Controller Information Base (CIB). | 10-29-2015 |
20150333998 | System and Method for Anomaly Detection - In one embodiment, a method of determining whether a metric is an anomaly includes receiving a data point and determining a metric in accordance with the data point and a center value. The method also includes determining whether the metric is below a lower threshold, between the lower threshold and an upper threshold, or above the upper threshold and determining that the data point is not the anomaly when the metric is below the lower threshold. Additionally, the method includes determining that the data point is the anomaly when the metric is above the upper threshold and determining that the data point might be the anomaly when the metric is between the lower threshold and the upper threshold. | 11-19-2015 |
20150341251 | MEASUREMENT OF FIELD RELIABILITY METRICS - A system that incorporates teachings of the subject disclosure may include an access segment of a mobility network in which network aggregation devices facilitate a transfer of network traffic data received from base transceiver stations, direct probe packets to a targeted base transceiver stations and determine reachability, by way of an expected reply to each probe packet. A change from reachability to unreachability of the targeted base transceiver station or the network aggregation device is determined to be an indication of service impacted outage. Other embodiments are disclosed. | 11-26-2015 |
20150372893 | IDENTIFICATION OF CANDIDATE PROBLEM NETWORK ENTITIES - The detection of network communication problems in networks that have multiple end nodes, and multiple transit nodes in between. One or more of the end nodes monitors one or more flows, creates associated flow information including performance information for each flow, and then reports the flow information. A system then estimates, for each of multiple flows within the network, a likely path that network traffic takes through that network. The system might then use performance information for each of the reported flows to identify at least one candidate problem network entity that is common amongst the estimated paths of the at least the subset of the plurality of flows. | 12-24-2015 |
20160036630 | REALIZING GRACEFUL RESTART IN IS-IS NETWORK - Before restarting an IS-IS protocol process, the first device sends an IIH packet with a RR flag set and a hold time field being a first predetermined value to a second device. The first predetermined value is greater than a normal value of a hold time kept in the second device for the first device, and the first device establishes an adjacency with the second device. After receiving an IIH packet with a RA flag replied by the second device, the first device restarts the IS-IS protocol process and starts to execute a GR process. The IIH packet with the RA flag set is replied by the second device after the second device updates the hold time kept in the second device for the first device according to the first predetermined value. | 02-04-2016 |
20160036694 | CONTINUITY CHECK PROTOCOL OPTIMIZATION SYSTEMS AND METHODS - A Continuity Check (CC) protocol optimization method in a switch includes operating a plurality of CC sessions with a peer switch, wherein, for CC intervals, N sessions of the plurality CC sessions are set to a short interval and M sessions of the plurality of CC sessions are set to a long interval, wherein N and M are integers; switching a first session of the N sessions with a second session of the M sessions based on one of a fault and user provisioning; and exchanging the CC intervals between the first session and the second session subsequent to the switching. | 02-04-2016 |
20160050131 | PASSIVE REACHABILITY MEASUREMENT FOR INLINE SERVICE CHAINING - A method is implemented by a computing device in communication with a network having a plurality of switches. The method performs path correctness testing where the path defines a service chain associated with a flow of data. The method configures the plurality of switches using a flow control protocol. The method includes the steps of selecting a switch from the path to configure path correctness testing, sending a configuration request to the selected switch to instate at least one rule for testing path correctness, receiving copies of flow packets from at least one switch in the path, and comparing the copies of flow packets with a service chain configuration of the flow to confirm path correctness. | 02-18-2016 |
20160057038 | COMMUNICATION SYSTEM, FAILURE CONTROL DEVICE, AND FAILURE CONTROL METHOD - A communication system includes: a first communication device configured to include first buffers to store data to be transmitted and received; a second communication device configured to include second buffers to store data to be transmitted and received; and a failure control device configured to include: an obtainment unit configured to obtain buffer usage state information to indicate a state of use of each of the first buffers and the second buffers from each of the first communication device and the second communication device; and an identification unit configured to identify a failure occurrence site on a channel, based on the obtained buffer usage state information, wherein the first communication device is configured to transmit and receive the data via the channel to and from the second communication device. | 02-25-2016 |
20160105380 | MAKE-BEFORE-BREAK SYSTEMS AND METHODS DECOUPLING A CONTROL PLANE FROM A DATA PLANE - A Make-Before-Break (MBB) method, in a node operating in a network with a control plane, decoupling the control plane from a data plane, includes, for a connection operating on a path in the network, determining a reserved connection on a new path, through the control plane, wherein the reserved connection has zero bandwidth; signaling the reserved connection on the new path; creating the reserved connection in the control plane while suspending implementation in the data plane due to the zero bandwidth; and releasing the connection on the path and modifying the reserved connection on the new path to establish the connection on the new path. | 04-14-2016 |
20160127242 | SYSTEM AND METHODS FOR ASSIGNING SLOTS AND RESOLVING SLOT CONFLICTS IN AN ELECTRICAL DISTRIBUTION GRID - A system and method for detecting and resolving conflicts in transmissions from DTs located on the edge of an electrical power distribution grid. By examining the frame and time slot of the conflict and inferring a possible DT involved in the transmission conflict and reassigning the DT's transmission to another frame and time slot, the conflict should be resolved and the data being provided by the DT is not necessarily lost nor is its receipt unreasonably delayed. | 05-05-2016 |
20160164756 | SWITCHING MODULE - A fiber channel switching module can include an integrated trace buffer memory, a crossbar switch and a control processor disposed on a single line replaceable module (LRM). The trace buffer memory may be adapted to capture selected data traffic transiting the switch fabric based on pre-selected triggers. The selected data can be read out of the trace buffer memory and used for selected diagnostics. | 06-09-2016 |
20160380783 | 128 Gigabit Fibre Channel Speed Negotiation - The FC port state machine enhanced by determining if various lanes are configured to be operated in 128 Gbps mode by operating as parallel lanes as indicated by using a reserved bit in a link training field. If so and if all of the ports are 32 Gbps ports and pass training, then four lanes can be combined to form a 128 Gbps link. If the ports are configured for 128 Gbps only operation and at least one lane does not negotiate to 32 Gbps or fails training, the link is not activated and none of the lanes are activated. If the ports are configured to do either 128 Gbps or independent operation and at least one lane cannot operate at 128 Gbps, then the lanes operate independently at the negotiated and trained speed. If the lanes are configured for only independent operation the transceiver develops independent links as negotiated. | 12-29-2016 |
20180026871 | DETECTING AND PREVENTING NETWORK LOOPS | 01-25-2018 |
20190149398 | DETECTING SOURCES OF COMPUTER NETWORK FAILURES | 05-16-2019 |
20190149447 | Dynamic Monitoring and Visualization for Network Health Characteristics | 05-16-2019 |