Abstract: In a redundant packet communication path including an active path and a backup path, user data that flows into the active path during a time when switching from the active path to the backup path is completed is transferred to a device at a protection zone receiving end to reduce a communication interruption time (traffic suspension time) in a user's point of view.

Abstract: A media gateway controller (MGC) is described herein that implements a shared risk group package to control and prevent a media gateway (MG) from establishing redundant links like a primary link and a secondary link that use resources that share the same risk of failure. Essentially, the MGC uses the shared risk group package to control which resources like ephemeral terminations are used by the MG to establish the primary link and the secondary link such that if any of the resources associated with the primary link fail then the secondary link remains operational within the MG and if any of the resources associated with the secondary link fail then the primary link remains operational within the MG.

Abstract: A secure data parser is provided that may be integrated into any suitable system for securely storing data in and communicating data with cloud computing resources. The secure data parser parses data and then splits the data into multiple portions that are stored or communicated distinctly. Encryption of the original data, the portions of data, or both may be employed for additional security.

Abstract: In a method for fast switching traffic in a hierarchical virtual private LAN service for use in a User-facing Provider Edge (UPE) device, a shared logic port number is assigned to each pair of primary pseudo wire and standby pseudo wire. A MAC address associated with a pair of primary pseudo wire and standby pseudo wire is associated with a logic port number shared by the primary pseudo wire and standby pseudo wire. Filling, in a logic port table, for each logic port entries containing: a logic port number, a primary pseudo wire inbound-label, a standby pseudo wire inbound-label, a primary pseudo wire outbound-label, a standby pseudo wire outbound-label and information of leaving a public network. Setting the corresponding information of leaving the public network in the logic port table depending upon whether the primary pseudeo wire is active or inactive.

Abstract: Systems and methods provide remote performance monitoring and testing to a cell site in a cellular communications network. The systems and methods include a network management center having remote monitoring and testing capabilities utilizing an intelligent customer service unit that traps and makes available alarm information on the transport link.

Abstract: A method, computer readable medium and apparatus for providing a back-up internet protocol (IP) connection are disclosed. For example, the method monitors a primary IP connection to a subscriber premises, detects a failure or a degradation of the primary IP connection to the subscriber premises and activates a back-up IP connection to the subscriber premises.

Abstract: An approach is provided for determining alternative paths. Information is stored specifying a set of available paths among network elements within a connection-oriented network. The available paths are sorted according to a predetermined criterion. The sorted paths are selectively filtered based on either a particular one of the network elements, a region associated with one or more of the network elements, or a combination thereof.

Abstract: Certain aspects of the present disclosure support techniques for collecting system information in a network on a chip (NoC). A dedicated packet may be transmitted from a source node to a destination node. As it traverses through the NoC, the dedicated packet may collect information from various nodes, which may be made available by the destination node. The collected information may be used in an effort to detect failures and collect statistics regarding the NoC.

Abstract: The present invention provides a method for blocking a protocol message at a Sub-ring control channel without a virtual channel, for avoiding the problem that the Sub-ring is in a continuous refresh state all the time caused by the existing solution of the Sub-ring control channel without the virtual channel, and the method includes: blocking forwarding of relevant messages when a forced switch is initiated or a failure is detected.

Abstract: A hierarchical structure network of devices is formed. A group of devices may be grouped together to form a domain. A plurality of domains formed in a hierarchical structure forms a hierarchical network. Traffic flow topology may be updated only within the same domain that topology changes. In one embodiment, traffic flow topology is updated only in a parent domain and a child domain when the status of a link connecting the two domain changes. Thus, other domains within the network have no need to update the traffic flow topology and remain agnostic to the traffic flow updates. Thus, responsiveness of the network to topology changes is improved. Multiple links may each carry traffic if multiple links exist between nodes. As such, a network of robust redundant interconnections with active links is formed that react quickly to network topology changes and that uses the interconnection links in an efficient manner.

Abstract: Method and system for providing dynamic configuration of link redundancy in data network based on detection of dynamic changes in the network topology including the steps of detecting data network topology, determining a number of data paths from a node in the data network topology to each of a respective pair of peer nodes coupled to the node by a corresponding interface, determining a data path in the data network topology between the peer nodes, calculating a set of nodes reachable via each interface coupled to the node and the respective peer node in the data network topology, and comparing the set of calculated nodes is provided.

Abstract: A communication transfer apparatus and a communication transfer method can transfer communications at low cost without the need of requesting a global IP network to switch any port number. The local internet protocol address of the origin terminal of transfer described in a record relating to a transfer out of the records of the masquerade table that is utilized for an internet protocol masquerade is rewritten as the local internal protocol address of the destination terminal of transfer, while maintaining the global port number of the record.

Abstract: A system, method and apparatus of failover indication of a Multicast Virtual Private Networking (MVPN) P-Tunnel at a leaf provider equipment (PE) router. Border Gateway Protocol (BGP) Bidirectional Forwarding Detection (BFD) attributes may be adapted to associate a BFD discriminator with a P-Tunnel terminated at the Leaf PE router such that BFD session status may be used to indicate a tunnel failure condition.

Abstract: A system, method and apparatus in which RSVP path messages are modified to indicate that a failed source-to-leaf (S2L) sub-LSP or path has switched (or is switching) to a bypass S2L sub-LSP or path via a local-protection mechanism.

Abstract: A method for generating a frame signal includes monitoring a first frame signal and obtaining a first parameter based on the monitoring result; setting a second parameter based on the type of the first frame signal; when the first frame signal is being input, generating a second frame signal with a bit rate different from that of the first frame signal by determining data and stuff byte positions based on the first parameter and performing frame processing on data and stuff bytes corresponding to the first frame signal based on the determined data and stuff byte positions; and when the first frame signal is not being input, generating the second frame signal by determining the data and stuff byte positions based on the second parameter and performing the frame processing on data and stuff bytes corresponding to a maintenance signal based on the determined data and stuff byte positions.

Abstract: Aspects of a method and system for improved communication network setup utilizing extended terminals are presented. Aspects of the method may comprise configuring a wireless Ethernet terminal functioning as a client station by a configurator via a network. The configured wireless Ethernet terminal may wirelessly receives information from a wireless station, and communicate the wirelessly received information to at least one of a plurality of wired stations via at least one of a plurality of corresponding wired interfaces. Aspects of the system may comprise a collocated device functioning as a configurator that configures a wireless Ethernet terminal functioning as a client station via a network. The configured wireless Ethernet terminal may wirelessly receives information from a wireless station, and communicate the wirelessly received information to at least one of a plurality of wired stations via at least one of a plurality of corresponding wired interfaces.

Abstract: A 1553 data communication system having a primary data bus, a redundant data bus and a non-1553 data communication overlay system is provided. The non-1553 data communication overlay system comprises a non-1553 bus controller terminal and a non-1553 remote terminal. Each non-1553 terminal includes a non-1553 transmitter block connected to the primary bus and the redundant bus for sending non-1553 signals, a non-1553 receiver block for receiving non-1553 signals and a non-1553 receive path selection block. The non-1553 receive path selection block selectively establishes a receive path between the primary data bus or the redundant data bus and the non-1553 receiver block according to predefined receive path selection criteria. A 1553 data communication method is also provided.

Abstract: Techniques for a node in a wireless network to process packets are disclosed. An example method includes registering with a network-management system in the network to become a node in the network, determining neighboring nodes, sending a link-state advertisement to the network-management system, the link-state packets providing its neighboring relationships, processing the packets using switching rules for a tree switching network portion of the network, the switching rules defining at least one of (1) an ingress link to a parent node and (2) egress links to child nodes, determining if a wireless link to a neighboring node has failed, and when a wireless link to a neighboring node has failed, informing a node at the end of an ingress wireless link and the network-management system of the failed link.

Abstract: In one embodiment, a path for a sliced tunnel that extends from a head-end node to a tail-end node is computed. The sliced tunnel is furcated into a plurality of child tunnels at one or more fork nodes located downstream from the head-end node. Each child tunnel carries a portion of traffic for the sliced tunnel. The sliced tunnel is merged at one or more merge nodes located downstream from respective ones of the fork nodes. The portions of traffic on the child tunnels are aggregated at the merge nodes. The head-end node sends a signaling message to establish the sliced tunnel along the computed path. The signaling message includes an indication of the one or more fork nodes where the sliced tunnel is furcated into child tunnels and the one or more merge nodes where child tunnels are merged. The head-end node then forwards traffic onto the sliced tunnel.

Abstract: A procedure, and an apparatus, system and computer program that operate in accordance with the procedure, for operating a dual homed communications network. In the procedure, a backup aggregation n ode is configured in accordance with a configuration of a primary multi-service router. A failure is detected in a first communication path that includes a primary multi-service router. In response to the detection, a second, backup communication path is activated that includes a backup multi-service router. In response to the activation, a router is negotiated with so that traffic forwarded by the router is provided to the second, backup communication path instead of the first communication path.

Abstract: A label switching router (LSR) and a method of switching data traffic to a predefined backup traffic path by the LSR in an MPLS (multi-protocol label switching) network. The LSR, upon detection of failure of a protected path during an LDP session, maintains an LDP session and forwards data traffic via the backup traffic path according to a forwarding table. The forwarding table contains logical output interface information including an outgoing label, a logical output interface, and the next hop of the predefined backup path.

Abstract: A method and a device for predicting and determining a failure include a signal monitor that monitors the signal quality of each link, a signal quality prediction section that predicts future signal quality by using given forecast information and information on the monitored signal quality, and a failure prediction determination section that, depending on a degree of deterioration of the predicted signal quality with respect to a link, determines to bypass the link or to lower the symbol rate of the link.

Abstract: Particular embodiments may enable setup and signaling of co-routed and non co-routed label switched paths (LSPs) of a bidirectional packet traffic engineering (TE) tunnel in an unambiguous manner with respect to provisioning of the LSPs/tunnel. A head-end node may set up the bidirectional packet TE tunnel by computing a forward (and possibly a reverse) direction LSP, and then signal the bidirectional TE tunnel utilizing, e.g., extensions to an associated Resource Reservation Protocol (RSVP) signaling method. The extensions to the associated RSVP signaling method include a plurality of additional Association Types of an Extended Association object carried in a RSVP Path message transmitted by the head-end node to the tail-end node over the forward direction LSP, wherein the additional Association Types explicitly identify the provisioning of the forward and reverse direction LSPs as co-routed or non co-routed.

Abstract: Failover of VPN traffic between MPLS tunnels may be accelerated by determining a main and a standby MPLS tunnel for each VPN and passing both the main and standby MPLS tunnel information to the forwarding plane of a network element configured to implement the VPN. In the event of failover of a main MPLS tunnel interface, the forwarding plane may be instructed to use the standby MPLS tunnel instead of the main MPLS tunnel. Since the standby MPLS tunnel has already been determined, and information associated with the standby MPLS tunnel has already been provided to the forwarding plane, it is not necessary to recompute a new MPLS tunnel or reprogram the forwarding plane using the new MPLS tunnel information. By removing control plane operations and control plane-forwarding plane interaction from the handling of failovers, the failover recovery time may be accelerated to under 50 ms, to thereby enable VPN connections to handle time sensitive traffic.

Abstract: Today, 100BaseT is commonly used in industrial Ethernet application. As a result of being in such an environment, Ethernet cables are subject to abuse, which can result in costly failures and repairs. Here, a system is provided that enables use of remaining and largely undamaged twisted-pairs within Ethernet cables to maintain 100BaseT connections without costly repairs and failures.

Abstract: A computer network includes first and second Ethernet access domain networks, each of Ethernet access domain networks including a user-facing provider edge (u-PE) device, and a stack group of network-facing provider edge (n-PE) devices coupled with the u-PE device, the n-PE devices running a bidding protocol to select one of the n-PE devices as a primary n-PE device for a single pseudowire connection path between the first and second Ethernet access domain networks. 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. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

Abstract: A method for improving the reliability and performance of Vehicle-to-Vehicle (V2V) networks where digital certificates are necessary for message authentication and some messages may be lost in transmission. The method uses Forward Error Correcting (FEC) codes to encode a digital certificate into multiple segments, and attaches one or more segment to each message transmitted. Nodes receiving the messages can reconstruct the certificate as long as they successfully receive a minimum number of the transmitted messages, where the minimum number is less than the total number of messages transmitted. This allows message authentication to continue uninterrupted, even in a network environment where some messages are lost in transmission. Two different types of FEC codes are described, and adaptive schemes are included to optimize message throughput based on such network conditions as node density.

Abstract: An interconnect block for a data processing apparatus, said interconnect block being operable to provide data routes via which one or more initiator devices may access one or more recipient devices, said interconnect block comprising: a first and a second portion; said first portion comprising at least one initiator port for communicating with one of said initiator devices, and at least one recipient port for communicating with one of said recipient devices; said second portion comprising at least two recipient ports for communicating with at least two recipient devices, said second portion being connected to said first portion via at least two parallel connecting routes, said at least two recipient ports being connectable to said at least two parallel connecting routes; wherein in response to a request received from one of said initiator devices at said first portion to perform a transaction accessing one of said at least two recipients in communication with said second portion, said interconnect block is op

Abstract: Method and system for handling error events on a current path for processing an I/O request for reading information from and writing information to a storage space is provided. A system is able to communicate with the storage space via more than one path. If the current path reports an error event, then an alternate path quality is determined to ascertain whether the alternate path will generate an error similar to the current path. The alternate path quality is determined based on a plurality of factors which are assigned certain weights. The weights are determined based on a likely contribution of each factor to a repetition of the error reported by the current path. If the alternate path quality is equal to or exceeds a programmable threshold value, then the alternate path is selected.

Abstract: The present disclosure provides systems and methods for mesh restoration based on Associated Hop Designated Transit Lists (DTLs). The Associated Hop DTLs are calculated through a global restoration calculation (GRC) algorithm that can be run by a central controller in an offline manner. The restoration paths calculated by the GRC algorithm can then be pushed down to the originating nodes for each connection to utilize at the time of a given failure scenario. This GRC algorithm can be performed for each possible bundle failure in the network, where a bundle failure is determined by the set of all links which may fail together due to common shared risk, such as a common conduit or DWDM fiber. The globally calculated, contention free, restoration paths are then pushed down to each node in the network.

Abstract: A primary border node (BN) and a standby BN are provided for internetworking two network domains, such that connectivity between the two network domains is maintained when a failure occurs in one of the network domains. The two network domains include an access network that implements MPLS-TP and a core network that implements IP, MPLS, or a combination of both. The primary BN establishes a tunnel from itself to the standby BN, and re-directs network data traffic from itself to the standby BN via the tunnel when it detects that an access node has switched connection from the primary VN to the standby BN. The primary BN also monitors its connections to the core network, and signals access nodes to switch to the standby BN if a failure is detected in these connections.

Abstract: Technique for fast rerouting (FRR) of traffic in a communication network, from a working path comprising a link with its downstream node, to one or more backup paths concurrently providing link protection and node protection to the link and the downstream node; the method comprises enabling the downstream node to block forwarding of traffic, if received at the downstream node along the backup path(s), towards a more-down-stream node in the working path in case the more-down-stream node participates in providing node protection against a failure of the downstream node, the technique thereby prevents traffic duplication at the more-down-stream node and does not require distinguishing a link failure from a node failure.

Abstract: A method is provided for use by a user terminal (20) operating an IP-based multimedia broadcast/multicast service. The method comprises storing (S3) information relating to user service registrations performed (S2) using an IP connection such as a Packet Data Protocol, PDP, context established to enable connectivity between the user terminal (20) and a service node (40) for the broadcast/multicast service. The information is of a type to enable re-registration (S7) of at least some of any of the user services affected by a loss of the IP connection. In one embodiment, the multimedia broadcast/multicast service is a 3GPP Multimedia Broadcast/Multicast Service, MBMS, the user terminal (20) is a User Equipment, UE, and the service node (40) is a Broadcast/Multicast Service Center, BM-SC.

Abstract: According to an aspect, a network system comprises a ring-type network, and a master transmission apparatus. The master transmission apparatus includes blocking unit, conversion unit and transmission unit. The blocking unit prohibits relay of the transmission frame received through a first virtual transmission line and a second virtual transmission line. The conversion unit changes transmission path information included in the transmission frame from the first virtual transmission line to the second virtual transmission line. The transmission unit transmits the transmission frame including the transmission path information changed by the conversion unit.

Abstract: In one example, a network device includes a virtual network agent, and a network interface to send network packets to the virtual network controller using a default route for a physical network prior to establishing a communication session between a virtual network controller and the virtual network agent, wherein, after establishing the communication session between the virtual network controller device and the virtual network agent, the virtual network agent receives from the virtual network controller a command to install a new route at the network device, wherein the new route specifies encapsulation information to use for encapsulating network packets for sending the network packets to the virtual network controller over an overlay network, and wherein, responsive to detecting a failed link in the physical network, the virtual network agent sends packets to the virtual network controller on an alternate route in the overlay network.

Abstract: A communication network system includes a processor, and a plurality of node apparatuses using a protocol to establish paths therebetween, wherein the processor determines each of the node apparatuses to be a packet source or a packet destination, and operates to detect an occurrence of failure in two paths being established between the packet source and the packet destination in the communication network system, and wherein the processor transmits packet data including user data through one of the two paths, and when one of the node apparatuses detects an occurrence of a failure in one of the two paths, the processor changes the path to the other path.

Abstract: Methods, systems and apparatuses for controlling radio links in a multiple carrier wireless communication system are disclosed. A method can include aggregating control functions from at least two carriers onto one carrier to form an anchor carrier and one or more associated secondary carriers; establishing communication links for the anchor carrier and each secondary carrier; and controlling communication based on the anchor carrier.

Abstract: A system may include a destination device that receives information about a caller via a first outgoing leg and exchanges content with the caller via the first outgoing leg. The system may further include a network device that receives an incoming call from the caller, establishes the first outgoing leg, connects the incoming call to the first outgoing leg so the content can be exchanged, monitors the first outgoing leg, selectively establishes a second outgoing leg in response to the monitoring, and connects the incoming call to the second outgoing leg.

Abstract: Embodiments of the present disclosure set forth a method for forecasting data usage in a region covered by a cellular network. The method includes defining a first subregion surrounding a first point of interest in the region; and calculating a forecasted usage amount of the cellular network in the first subregion in a second time slot based on a first usage amount of the first subregion in a first time slot, a second usage amount of a second subregion geographically adjacent to the first subregion in the first time slot, a first probability associated with mobile devices in the first subregion migrating to the second subregion, and a second probability associated with mobile devices in the second subregion migrating to the first subregion.

Abstract: A relay device includes a processor that executes a procedure. The procedure includes detecting a change in a first communication state between a local device and a first relay device that is arranged in a stage preceding or succeeding the local device and connected to the local device with a logical path, obtaining, from a second relay device for relaying a logical path different from the logical path relayed by the local device, a second communication state between the second relay device and a third relay device that is arranged in a stage preceding or succeeding the second relay device and connected to the second relay device with a logical path, and enabling a logical path between the local device and the second relay device according to a combination of the first and the second communication states when the change in the first communication state is detected.

Abstract: In a wireless and/or power line communication (PLC) network environment, techniques for multicast of data and management of multicast groups assist in regulating bandwidth consumption and provision of desired multicast data. Nodes indicate interest in multicast groups by transmission of reports upstream. Report transmission may be suppressed to balance bandwidth with need for multicast data. Multicast data packets may be retransmitted downstream to fulfill requests indicated by the reports at a rate and/or frequency based on multicast packet duplication or redundancy. Information, such as broken links or “leave” packets, may indicate that one or more downstream nodes should be removed from a forwarding state. However such removal may impact other nodes. A query may be transmitted downstream, to determine if retransmission/forwarding of multicast retransmissions should continue. Query transmission may be based on a balance between query bandwidth consumption and the needs of downstream nodes.

Abstract: A method for detecting a mismatch between a first port and a second port includes determining whether a destination address associated with the second port and a virtual local access network identifier (VID) for a service instance monitored by a first maintenance end point are included in a table of the first port. The method further includes setting a traffic field in a first continuity check message. The method additionally includes receiving, at the first maintenance end point, a second continuity check message that includes a traffic field. The method also includes detecting a mismatch when the value of the traffic field in the second continuity check message does not match the value of the traffic field in the first continuity check message.

Abstract: A system and method for protecting a received data stream. Active receivers and standby receivers are provided, each adaptable to receive a data stream on a traffic channel. Plural data processing units are operatively in communication with the receivers. At least one of the plural DPUs provides a switching signal to the receivers to switch the state of the active receiver to standby and the state of the standby receiver to active as a function of a quality measurement of the received data stream via the traffic channel.

Abstract: A method of enabling a resilient interface between a first node and a G.8032 Ethernet ring. A Link Aggregation Group (LAG) comprising respective links is provided between the first node and at least two ring nodes of the Ethernet ring. An aggregation function is instantiated at the first node, for distributing subscriber traffic to the links of the LAG in a conventional manner. A first one of the ring nodes is designated as Active, and each of the other ones of the ring nodes are designated as Inactive. At each Inactive ring node, a logical block is imposed on its respective link of the LAG, such that subscriber traffic between the first node and the Ethernet ring is routed by the aggregation function only through the respective link between the first node and the Active ring node.

Abstract: Provided is a relay system having a first node and a second node, and a third node and a fourth node provided opposing thereto with connected by VLAN paths, in which the first node notifies, via a second VLAN path, the fourth node of the APS packet in which a state of a first group is stored. The third node notifies, via a third VLAN path, the second node of the APS packet in which a state of a second group is stored. The second node and the fourth node use a fourth VLAN path and exchange the state of the first group and the state of the second group, and, when the states of the first group and the second group are SF-W of a first VLAN path and the self apparatus is master, switch the first VLAN path to the second VLAN path or the third VLAN path.

Abstract: Providing protection to network traffic includes sending a Pseudowire protection configuration parameter for configuring a standby Pseudowire between a source node and a destination node, receiving a Pseudowire configuration acknowledgement indicating whether the Pseudowire protection configuration parameter has been accepted by the destination node, and in the event that the Pseudowire protection configuration parameter has been accepted by the destination node, using the standby Pseudowire, wherein the standby Pseudowire's configured based at least in part on the Pseudowire protection configuration parameter.

Abstract: A failure protection method of a network connecting between nodes by multiple working paths and a protection path is disclosed. An allocation bandwidth is determined to allocate to a detected path where a failure is detected in multiple paths being set to the multiple working paths, depending on the detected path. The detected path is switched from one of the multiple working paths to the protection path. Data to be transmitted by the detected path is transmitted by using the allocation bandwidth determined within an entire bandwidth of the protection path.

Abstract: Nodes and methods are disclosed, including, circuitry of a source node in a mesh network retrieving information indicative of network topology; identifying a working path from the source node to a destination node; identifying potential protection segments of the working path, wherein a potential protection segment has at least one disjoint protection path available for the segment; creating a hypothetical network topology comprising the nodes of the working path and hypothetical links between the nodes, wherein the hypothetical links represents potential protection segments identified, and the links are assigned a weight; executing a Shortest Path Algorithm on the hypothetical network topology; identifying as optimal segments the potential protection segments represented by the hypothetical links determined as being in the shortest path by the Shortest Path Algorithm; generating and transmitting a message communicating need for resources in case of failure of the optimal segments.

Abstract: Network repeaters which each implement a redundant switching function previously grasp connection states of ports of a network system by using an inquiry frame and an exchange frame. At the time when a line is broken, when actively confirming a state of a port connected to a port in which a line is broken via a downstream device, the network repeaters each grasp that which portion of the line is broken and determine whether a switchover is required. Through the process, the network repeaters each prevent a useless switchover such as switching-back immediately after the switchover, and at the same time since a mechanism of waiting for a given length of times is not required, they each perform a fast switchover.

Abstract: In one embodiment, certain SRLGs associated with members of a bundle are deemed to be “risk-free SRLGs”, i.e., SRLGs whose failure may not substantially impact the capacity of the bundle to carry traffic in a computer network. In a bandwidth unaware embodiment a number of active members of the bundle is identified for each SRLG, and a bandwidth aware embodiment further specifies an available bandwidth capacity for each SRLG to determine risk-free SRLGs. A backup path or tunnel may be established and utilized to protect a communication link as long as the SRLGs shared are deemed to be risk-free SRLGs.