Abstract: A method of packet processing, includes: providing a plurality of network appliances that form a cluster, wherein two or more of the plurality of network appliances in the cluster are located at different geographical locations, are communicatively coupled via a private network or an Internet, and are configured to collectively perform out-of-band packet processing; receiving a packet by one of the network appliances in the cluster; processing the packet using two or more of the plurality of the appliances in the cluster; and passing the packet to one or more network monitoring tools after the packet is processed.

Abstract: Systems, methods and apparatus are described for testing a data connection provided over a power supply line. A testing apparatus is coupled to a socket of the power supply line. The AC power supply line communicatively couples the testing apparatus to a communication device or another testing apparatus. The testing apparatus identifies the signal strengths of signals received by the testing apparatus and identifies the signal strengths of signals received by the communication device. The testing apparatus outputs an indicator of the first signal strength and the second signal strength to a user and this information may be utilized to detect noise or other problems in the data connection provided over the AC power supply line.

Abstract: A mobile communication device (102) includes both a wide area network (WAN) radio modem (122), and a personal area network (PAN) radio modem (134), which operate on similar frequencies. When the both the WAN and PAN modems are operating and carrying time-sensitive data, the WAN modem disables transmission by the PAN modem when the WAN modem is due to receive data from a WAN base station (406), including neighbor scans. The duration and frequency of disabling the PAN modem is controlled so that the retransmission is successful.

Abstract: Efficient and highly-scalable network solutions are provided that each utilize deployment units based on Clos networks, but in an environment such as a data center of Internet Protocol-based network. Each of the deployment units can include multiple stages of devices, where connections between devices are only made between stages and the deployment units are highly connected. In some embodiments, the level of connectivity between two stages can be reduced, providing available connections to add edge switches and additional host connections while keeping the same number of between-tier connections. In some embodiments, where deployment units (or other network groups) can be used at different levels to connect other deployment units, the edges of the deployment units can be fused to reduce the number of devices per host connection.

Abstract: The present disclosure provides hybrid packet-optical private network systems and methods for a private and dedicated multi-point Ethernet Private Local Area Network (EPLAN). The network systems and methods include a Layer 1 infrastructure service with the inclusion of reserved, dedicated packet switch capacity upon which clients can build their personal, private packet networks. In the systems and methods described herein, packet networking methods are not used to partition the isolated LAN connectivity. Instead, dedicated Ethernet Private LANs (EPLs) are defined between dedicated virtual switching instances (VSIs) that are defined, as necessary, within larger packet-optical switches. Each VSI is partitioned from the remainder of its packet switch fabric as a dedicated, private resource for a specific EPLAN. A packet network is then built by the customer on top of the private EPLAN bandwidth and operated as an isolated, private network with no influence by other carrier's network resources.

Abstract: The invention relates to a measuring device having at least one first assembly and at least one second assembly. The first assembly and the second assembly each comprise an intermediate frequency interface or a complex baseband interface. The intermediate frequency interfaces or baseband interfaces are designed as serial digital interfaces.

Abstract: The present application relates to a signal combining apparatus (12) having an input for receiving a signal from a signal generator (14) and an output for outputting a signal to a signal analyser (16). The input signal is split into a plurality of identical signals by a high isolation splitter (20) and the plurality of signals are transmitted via a plurality of transmit paths (22), which can be selectively enabled or disabled, to inputs a plurality of duplex combiners (24), each of which has an input/output port to which a device under test (18) can be connected. Outputs of the plurality of duplex combiners (24) are connected to a plurality of receive paths (26), which can be selectively enabled and disabled, whose outputs are connected to a signal relay (28) which is operative to receive one or more signals received through the plurality of receive paths (26).

Abstract: A new and improved Ethernet hub for providing visibility of data packet traffic in an Ethernet network is disclosed. The Ethernet hub includes a packet buffer being coupled with a plurality of network ports to enable full duplex data packet communications among connected network stations.

Abstract: An apparatus for identifying interconnections in a network. The apparatus comprises a plurality of transmitter coupling units, a plurality of receiver coupling units, and an interconnection identification means configured to identify interconnections between the transmitter coupling units and the receiver coupling units by cable lines in the network. In some embodiments, the interconnection identification means is configured to, if any one of the transmitter coupling units is coupled to the same cable line as a selected one of the receiver coupling units, identify the interconnection between the transmitter coupling unit and the selected receiver coupling unit according to by a binary tree search algorithm.

Abstract: According to one aspect, the subject matter described herein includes a method for testing a Diameter routing node. The method occurs a Diameter routing node. The method includes receiving, from a Diameter message generation module and via a test connection, a first Diameter message. The method also includes modifying the first Diameter message to include a test indicator parameter indicating the first Diameter message is a test message. The method further includes processing the first Diameter message. The method also includes directing the first Diameter message to an egress message manager.

Abstract: A distributed fabric system has distributed line card (DLC) chassis and scaled-out fabric coupler (SFC) chassis. Each DLC chassis includes a network processor and fabric ports. Each network processor of each DLC chassis includes a fabric interface in communication with the DLC fabric ports of that DLC chassis. Each SFC chassis includes a fabric element and fabric ports. A communication link connects each SFC fabric port to one DLC fabric port. Each communication link includes cell-carrying lanes. Each fabric element of each SFC chassis collects per-lane statistics for each SFC fabric port of that SFC chassis. Each SFC chassis includes program code that obtains the per-lane statistics collected by the fabric element chip of that SFC chassis. A network element includes program code that gathers the per-lane statistics collected by each fabric element of each SFC chassis and integrates the statistics into a topology of the entire distributed fabric system.

Abstract: A method for providing network connectivity is provided. The method may include interfacing with a wireless mesh network. The method may further include interfacing with one or more network link devices configured to establish a wireless connection to an external network. The method may additionally include routing outbound traffic received via the mesh network and intended for a destination accessible via the external network toward a selected one of the one or more bridge nodes for delivery via the external network. The method may also include routing inbound traffic received via one of the one or more bridge nodes from the external network toward a destination accessible via the mesh network. A corresponding system, apparatus, and computer program product are also provided.

Abstract: The invention in particular has as an object supervising a scheduler for the management of processing time sharing in a multitask data-processing system comprising a computation unit having a standard execution mode and a preferred execution mode for executing a plurality of applications. The execution time for the said plurality of applications is divided into a plurality of periods and a minimal time for access per period to the said computation unit is determined for at least one application of the said plurality of applications. For at least one period, the said preferred execution mode is associated with the said at least one application and the said at least one application is executed according to at least the said minimal time for access to the said computation unit. For the said at least one period, the said standard execution mode is associated with the applications of the said plurality of applications and at least any one of the applications of the said plurality of applications is executed.

Abstract: Methods and apparatus for conducting a test of a network including a plurality of endpoints, each endpoint including a software agent for conducting network tests. Candidate endpoints pairs to conduct the test may be identified from the plurality of endpoints. The candidate endpoints pairs may be ranked in accordance with stored connectivity data. The connectivity of the candidate endpoint pairs may be checked in rank order until a connectable endpoint pair is located. The connectable endpoint pair may be instructed to conduct the test.

Abstract: In one embodiment, a source device determines a source route from itself to a destination device in a computer network, and forwards a first packet on the source route with the source route included within the first packet. In addition, the source device generates a second packet with the source route included within the second packet, the second packet also including an indication to cause one or more of a plurality of transit devices to forward the second packet to a reachable 1-hop neighbor of a device in the source route two hops away from the respective transit device. The source device may then forward the second packet itself, as do one the one or more transit devices on a diverse path based on the source route, to a particular reachable 1-hop neighbor of a particular device in the source route two hops away from the source (or transit) device.

Abstract: Aspects of the invention pertain to transmitting packet data across a computer network. The packets may be sent via one or more distinct routes from a source to a destination. Each route may employ multiple routers disposed along the network. Non-colliding routes are determined by transmitting pairs of probe packets along the routes. A first probe packet has a maximal length, and a second probe packet has a minimal length. Depending on the order of arrival of the probe packets, the system determines whether two transport layer ports at the destination device collide. If there is a collision, then the system searches for a set of non-colliding ports. Once the non-colliding ports are determined, application data may be sent as packets along the different routes to those ports.

Abstract: Methods and apparatus related to control channels in a wireless communications system are described. Different white space bands may be available at different locations. A wireless terminal monitors control information from multiple potentially available communications channels. Control time slots corresponding to some different channels are intentionally time offset from one another. Some embodiments implement predetermined control slot timing synchronized with respect to an external timing source. In other embodiments, a wireless terminal selects a control time slot on a new channel as a function of control slot timing on channels already in use. A wireless terminal selects one of a plurality of communications channels for use in communicating information and determines a position of a control time slot to be used on the selected communications channels. The wireless terminal uses the control time slot on the selected communications channel to transmit and receive control information.

Abstract: A method and apparatus to activate over the air a wireless communication device by using a client-initiated bootstrap server and without the use of a provisioning server, a provisioning session and a provisioning protocol implementation at one or more servers of the wireless network. The client-initiated bootstrap server sends a bootstrap script and/or document to the wireless communication device to set an activation flag with commands included in the bootstrap scrip.

Abstract: Model based fault analysing in a base station in a mobile telecommunication system, the base station having a fault manager and resources adapted to transmit fault indication signals to the fault manager.

Abstract: There is provided a multicast router comprising a Simple Network Management Protocol (SNMP) agent and an SNMP database and a method of monitoring the router. In some embodiments the method comprises the multicast router receiving, via a downstream network interface, multicast data requests made by one or more hosts; the multicast router reading data contained in the multicast data request; the multicast router storing first data in the SNMP database for a downstream network interface, a multicast group address and a first host that requests multicast data, wherein the first data comprises information of the multicast groups and multicast channels requested by the first host; and the SNMP agent of the multicast router transmitting to an SNMP control station, using a version of the SNMP protocol, at least a part of the first data stored in the SNMP database.

Abstract: A Complex Adaptive Phase Discriminator (PD), as presented in some concepts of the present disclosure, is an adaptive filter that accurately estimates the instantaneous frequency of a dynamic complex signal. The PD can demonstrate accurate instantaneous frequency estimation and rapid convergence in dynamic complex signal environments, even when the frequency of its input may change rapidly. A direct PD architecture can estimate the instantaneous frequency of a complex primary signal, iteratively adapting a phase of a complex exponential by minimizing the mean squared error of a complex error signal. Instantaneous frequency can be directly estimated from the phase of the complex exponential. In contrast, an indirect PD architecture can estimate the instantaneous frequency of a complex primary signal, iteratively adapting a complex coefficient by minimizing the mean squared error of a complex error signal. Instantaneous frequency can be indirectly estimated by extracting the phase of the complex coefficient.

Abstract: A virtual application may be configured with several extension points within a host operating system. The virtual application may be configured with a private namespace in which various components, such as registry settings, dynamic linked libraries, and other components may reside. During configuration, links may be placed in the host operating system that may point to objects in the virtual application's private namespace so that the operating system and other applications may launch, control, or otherwise interact with the virtual application. The links may be located in a file system, registry, or other locations and may be available to other applications, including other virtual applications. A configuration routine may place the links into the host operating system at the time the application may be configured.

Abstract: A system reliability evaluation method for transmission by two minimal paths in time restriction is disclosed. The minimal path includes plural arcs between a start node and a terminal node in a flow network. The method includes the steps of providing a virtual network in a computer for simulating the flow network; inputting a transmission requirement and a time restriction; distributing the transmission requirement in a first minimal path and a second minimal path to make the first minimal path have a first throughput and the second minimal path have a second throughput; finding a plurality of feasible solutions satisfying the relation that the first throughput plus the second throughput equals the demand in the time restriction; finding a lower boundary vector by applying the comparative method; and computing a system reliability by applying set theory.

Abstract: Systems and methods for providing recording as a network service are provided. A representative method incorporates: communicating instructions to a network, the instructions indicating that IP packets associated with a communication that is to be recorded are to be directed to long term storage such that the network: receives the instructions; determines whether Internet Protocol (IP) packets, which are being communicated by the network, are associated with a communication that is to be recorded; and directs information corresponding to the IP packets associated with the communication to a long term storage device.

Abstract: There is provided a test apparatus for testing a device under test, including a receiving section that receives a packet from the device under test, a packet data sequence storing section that stores a data sequence included in each type of packet and received data included in the packet received by the receiving section, a transmission data processing section that reads data from the packet data sequence storing section and generates a test data sequence by adjusting a predetermined portion of a data sequence of a packet to be transmitted to the device under test to have a value corresponding to the received data, and a transmitting section that transmits the test data sequence generated by the transmission data processing section to the device under test.

Abstract: The invention includes a method and apparatus for determining the performance of a virtual concatenation group (VCG) signal transporting a client signal over a transport network. A method includes collecting a plurality of performance monitoring indicators associated with a plurality of VCG member signals of the VCG signal, synchronizing the performance monitoring indicators with respect to each other, combining the synchronized performance monitoring indicators to form VCG-level performance monitoring indicators, calculating VCG-level performance monitoring primitive measurements based on the VCG-level performance monitoring indicators, and processing the VCG-level performance monitoring primitive measurements to determine VCG performance.

Abstract: A communication path estimation method for estimating a communication path in a network in which communication is performed by forwarding packets from a plurality of transmission source nodes to a plurality of transmission destination nodes through a plurality of nodes, the method has obtaining, by a computer, path information of a plurality of paths, extracting a path in which a number of lost packets out of packets flowing in the extracted path is a predetermined value or more on the basis of the path information, choosing a pair of adjacent nodes included in the extracted path, and outputting a hypothesis that a static path is set from a first downstream node to a second downstream node when the first downstream node being included in a plurality of paths connected to a plurality of destination nodes and a first upstream node is the same with a second upstream node.

Abstract: Updates on access network capability are provided to an IP Multimedia System (IMS) network. A User Equipment (UE) that is connected to the access network initiates a communication session with the IMS network by sending a Session Initiation Protocol (SIP) registration request to the IMS network. The SIP registration request from the UE includes a P-Access-Network-Info (PANI) header or an Open Mobile Alliance (OMA) header, having a tag that includes current information regarding one or more capabilities of the access network to which the UE is currently connected. A triggering event, e.g., a change in Quality of Service, signals the IMS network to modulate service provisions in the IMS network according to the information concerning the access network capabilities that were provided in the PANI header.

Abstract: Some embodiments of the present invention provide systems and methods for detecting anomalies in network traffic. Some embodiments detect anomalies based on time-series activity in network traffic. Upon detection of an anomaly, significant changes can be analyzed to identify abnormal changes in network traffic across different network entities. The identified changes can then be used to determine the cause and the impact of the detected anomaly on the network traffic.

Abstract: One embodiment of the present invention provides a port profile management mechanism. The port profile management mechanism detects an active profile associated with a physical port on a switch and displays configuration of the port based on the identified port profile using the display mechanism. In addition, a port group management mechanism obtains information of a port group associated with a virtual machine, wherein the port group defines network configurations for the virtual machine. The port profile management mechanism detects a port profile associated with the virtual machine coupled to a physical port on a switch and displays an alert using the display mechanism in response to the port group and the port profile being out of synchronization.

Abstract: 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.

Abstract: Systems and methods for detecting device failures in a network having nodes coupled to a central controller, in which a first of the nodes communicates with the central controller via a second of the nodes. When the second node determines that the first node has not transmitted a predetermined number of messages over a predefined number of time periods, the second node provides a failure alert to the central controller. The central controller records a failure alert received from the second node in a log. Based on a set of failure alerts received from a number of nodes recorded in the log, the central controller determines whether the first node has failed.

Abstract: A Call Server in a network is able to monitor an offered rate of incoming calls per Access Gateway (AGW). A calculated GlobalLeakRate can be distributed between the AGWs in proportion to the traffic rate they offer. A leak rate calculation method is used to calculate the GlobalLeakRate control parameter of the ETSI_NR restrictor at an overloaded Control Server The leak rate calculation is based on the POTS call rejection rate. In one particular embodiment of the present invention, the calculation is based on bringing the call reject rate close to a configurable low target reject level. An MGC is able to identify the end of an overload event with a greater degree of confidence and an AGW is able respond appropriately if the AGW is prematurely instructed to stop the control.

Abstract: In a method of determining whether a data stream includes unauthorized data, the data stream is analyzed using a hardware filter to detect a presence of one or more of a first set of patterns in the data stream. It is determined whether a packet in the data stream belongs to one of a plurality of data flows to be further inspected based on the analysis of the data stream by the hardware filter. A set of rules is applied to the packet to produce rule match status data if it is determined that the packet belongs to one of the plurality of data flows to be further inspected. The packet is analyzed to determine if the packet includes unauthorized data using software stored on a computer-readable medium and implemented on a processor if the rule match status data indicates that the packet potentially includes unauthorized data.

Abstract: For use in a communication system where communication is carried out by setting a packet handling operation (flow entry) in the nodes by a control device, the present invention provides a configuration in which statistical information may be collected at a desired information granularity level without increasing the control load of the control device. A node of the communication system includes a packet processing unit that processes a received packet according to a packet handling operation defining a matching rule and processing of a packet that matches the matching rule; and a statistical information recording unit that records statistical information on a packet according to a division different from the matching rule, and a statistical information collection device is provided that issues an instruction on a division, according to which the statistical information is to be recorded, to the node and collects the statistical information.

Abstract: According to one embodiment, allocating demand includes receiving a demand graph that describes demands of a network. One or more weights are calculated for each demand. The demands are allocated according to the weights of the demands to optimize optical line card sharing.

Abstract: A method for sending a BFD packet includes: obtaining information about intermediate nodes to be passed by the BFD packet, where the information about the intermediate nodes uniquely corresponds to a link to be traveled by the BFD packet or a session on the link; setting the obtained information about the intermediate nodes into the BFD packet; and sending the BFD packet to a peer through the link corresponding to the information about the intermediate nodes. A method for searching for session ID locally, a link fault detection method and a link fault detection apparatus are provided herein.

Abstract: A system and method for updating forwarding tables in a blade packet manager is provided. The blade packet manager may include master and slave blades. A master management module on the master blade monitors the slave blades. Network address entry forwarding tables are maintained on the slave blades. A periodic sweep of slave blades for activity information is performed and reports are forwarded to the master blade. The master blade propagates the reported information from the master blade to each of the slave blades to update forwarding tables on each of the slave blades.

Abstract: A transfer path of a multicast packet is set to an output port, from among a plurality of outputs each associated with a plurality of input ports, which is specified to output the multicast packet. The number of completed path setting processes which is the number of processes for which path setting has been completed, is counted. It is determined whether or not the number of completed processes counted is identical with the number of processes for executing the multicast communication. When it is determined that the numbers are identical with each other, it is recognized that the transfer path setting of the multicast communication has been completed.

Abstract: A hybrid wired and wireless architecture for a process control system is disclosed that includes hierarchical adaptability and optimization capabilities. The system is arranged in three tiers, the first including a number of wireless end devices exchanging packets of data and/or instructions with the distributed control system, where each wireless end device is associated with one or more meters, remote terminal units, diagnostic devices, pumps, valves, sensors, or tank level measuring devices. The second tier includes a plurality of wireless routers, each including a memory that stores a routing table and a processor that routes packets. The third tier includes a master wireless gateway device operably connected to receive packets from and transmit packets to the distributed control system. The processor of each of the wireless routers routes packets across the tiers between the end devices and the wireless gateway devices based on the stored routing table.

Abstract: The invention relates a transmitter for transmitting data in bio-implantable medical devices, comprising: an activation unit which transmits; to a receiver, a predetermined number of frame bits which indicate the start of data transmission so as to activate the receiver; a preamble state notification unit which transmits, at the state where the receiver is activated or during data transmission to the receiver, a preamble data signal for turning the receiver into a preamble state; and a synchronization unit which transmits synchronization data for synchronization between the transmitter and the receiver in the preamble state.

Abstract: A computer readable storage medium stores a set of instructions executable by a processor. The set of instructions is operable to receive an image of a switch in a communications network, the image being a representation of an internal logic of the switch; simulate a plurality of communication sessions using the image; generate a plurality of simulated communication session records corresponding to the plurality of simulated communication sessions; and evaluate a performance of the switch by comparing the plurality of simulated communication session records to a set of expected communication session records, the expected set of communication set of records corresponding to the set of simulated communication sessions.

Abstract: Some embodiments provide a network virtualization apparatus for managing a plurality of managed switching elements that forward data in a network. The network virtualization apparatus comprises a controller for converting logical control plane data to logical forwarding plane data. It also includes a virtualizer for converting the logical forwarding plane data to physical control plane data. In some embodiments, the physical control plane data is subsequently translated into physical forwarding plane data that direct the forwarding of data by the managed switching elements.

Abstract: Some embodiments provide a distributed control system for controlling managed switching elements of a network. The distributed control system comprises a first controller for converting a first set of input logical control plane data to a first set of output logical forwarding plane data. It also includes a second controller for converting a second set of input logical control plane data to a second set of output logical forwarding plane data. The logical forwarding plane data is translated into physical forwarding behaviors that direct the forwarding of data by the managed switching elements.

Abstract: Aggregates are calculated from a data stream in which data is sent in a sequence of tuples, in which each tuple comprises an item identifier and a timestamp indicating when the tuple was transmitted. The tuples may arrive out-of-order, that is, the sequence in which the tuples arrive are not necessarily in the sequence of their corresponding timestamps. In calculating aggregates, more recent data may be given more weight by multiplying each tuple by a decay function which is a function of the timestamp associated with the tuple and the current time. The tuples are recorded in a quantile-digest data structure. Aggregates are calculated from the data stored in the quantile-digest data structure.

Abstract: In one embodiment, a plurality of network interfaces of a network device that are configured to communicate with other network devices in a first computer network are identified as network-to-network interfaces (NNIs). Also, one or more network interfaces of the network device that are configured to provide access to the first computer network to user devices are identified as user-to-network interfaces (UNIs). One or more NNIs of the plurality of NNIs are selected to forward traffic from the network device to an aggregation device of the first network that couples the first computer network to a second computer network. Also, one or more NNIs of the plurality of NNIs that have not been selected to forward traffic from the device to the aggregation device are designated as network-to-network interface alternates (NNI-ALTs). The one or more NNI-ALTs are treated as UNIs for user data traffic forwarding decisions.

Abstract: A method for identifying possible error causes in a network having a plurality of computer-based nodes is provided. The method comprises proceeding from a control node, the execution of a test module in each case running locally on all or on selected nodes that are to be tested is triggered for the purpose of identifying possible error causes on the respective node; testing of a network connection between all or selected nodes that are to be tested for the purpose of identifying possible error causes; and recording of a result including one error cause, provided such a cause can be identified.

Abstract: An endpoint integrity system controls access to resources of a protected network for endpoint devices attempting to access the protected network. The system may include a number of evaluation modules that communicate with an endpoint device. The evaluation modules generate policy results for the endpoint device, in which each of the policy results assume one of three or more states, called a multi-state policy result. The multi-state policy results are combined to produce a combined Boolean policy result.

Abstract: Systems, methods and other embodiments associated with dynamic probe generation are described. In one embodiment, an apparatus includes generation logic to dynamically generate a probe configured to identify a status associated with an event occurring in a network device, a path between network devices, and/or a location in an encapsulation stack. Additionally, the apparatus comprises reception logic to receive the status.

Abstract: 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.