Abstract: In one aspect, the disclosure includes an apparatus comprising a processor configured to function as a merge point (MP) in a point to multi-point (P2MP) backup label switching path (LSP) for a primary LSP, receive P2MP backup LSP information originating from a protected node, wherein the P2MP backup LSP information comprises the identity of a point of local repair (PLR), determine a backup label switching router (LSR), and send a message with the identity of the backup LSR to an upstream node.

Abstract: A method for location reporting at a charging area level granularity is provided. The method includes detecting at a mobility management entity (MME) a transition of a user equipment (UE) from a first cell to a second cell to obtain at least a second cell identifier. The method also includes determining at the MME whether the detected UE transition constitutes a transition from a first charging area to a second charging area using the second cell identifier by comparing the second cell identifier to a charging area configuration. A charging area includes a plurality of cells that are served by at least one eNodeB. The method further includes providing to a policy server a report of the determined UE transition, if it is determined that the detected UE transition constitutes a transition from the first charging area to the second charging area.

Abstract: Novel tools and techniques for providing network state information to customer equipment. In some embodiments, an operations, administration, and management (“OAM”) server might determine a status of a network connection between at least two network devices, might generate state information indicating the determined status of the network connection, and might send the state information to one or more customer equipment, using in-band signaling over a band between the at least two network devices. The state information might include one or more alarms that indicate one or more of a receive path error, a transmit path error, or a performance issue error (which might indicate at least one of jitter, delay, frame loss, peak actual throughput, or average actual throughput). The OAM server might be disposed or embodied within at least one of a customer equipment, a user network interface device, a network interface device, or a server over a network.

Abstract: In some embodiments, an apparatus includes a gateway device configured to be operatively coupled to a Fiber Channel switch by a first data port and a second data port. The gateway device is configured to designate the first data port as a primary data port and the second data port as a secondary data port. The gateway device is configured to associate a set of virtual ports with the first data port and not the second data port when in the first configuration. The gateway device is configured to associate the set of virtual ports with the second data port when in the second configuration. The gateway device moves from the first configuration to the second configuration when an error associated with the first data port is detected.

Abstract: A method of processing a signal at a network node of a wireless communication system is disclosed. The method comprises detecting a problem of a first interface; and transmitting a first message to the user equipment via a second interface for suspending data transmission through the second interface. Also, the method further comprises transmitting a second message to the user equipment via the second interface for resuming data transmission through the second interface, if a recovery of the problem of the first interface is completed. Preferably, the method further comprises transmitting a third message to the user equipment via the second interface for releasing connection between the network node and the user equipment, if a recovery of the problem of the first interface is failed.

Abstract: A method is provided for traffic aggregation in a hitless protected packet switched network having source and destination nodes. The method includes enabling a working path and a protecting path between the source and destination nodes. The working path is non-overlapping with respect to the protecting path. The method includes generating, using a processor, internal marker packets at working and protecting input ports of the source nodes. Each market packet represents a respective marker time period. The method includes transmitting the marker packets to working and protecting output ports of the source nodes, by the working and protecting input ports of the source nodes. The method includes selectively aggregating, at each of the working and protecting output ports of the source nodes, hitless traffic sent from different working and protecting inputs ports of the source nodes to provide an aggregated flow there from, responsive to the marker packets.

Abstract: A plurality of frame buffers of a communication device store input frames for respective flows, which are units of managing communication. A sequential scheduler and an adjustment scheduler cyclically visit the plurality of frame buffers to read a frame for external output from each frame buffer. The sequential scheduler reads one frame per a visit to each frame buffer at a speed lower than a communication speed of the communication device. The adjustment scheduler reads one or more frames per a visit to each frame buffer such that a restriction on read quantity defined by a reference value greater than the shortest frame size is imposed.

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: An apparatus comprising a path computation element (PCE) configured to communicate with a path computation client (PCC) and compute a point-to-multipoint (P2MP) path across an autonomous system (AS) domain. Also included is a network component comprising at least one processor configured to implement a method comprising obtaining a computation request for a P2MP path across a plurality of AS domains, attempting to calculate the P2MP path across the AS domains, thereby generating a computed path or a failure reason, and transmitting a reply comprising the computed path or an indication of the failure reason. Included is a method comprising exchanging a request message and a reply message about a P2MP path across an AS domain between a PCC and a PCE.

Abstract: A recovery network may provide communication recovery and backup services to an organization. The organization may comprise an internal network, such as Internet Protocol (IP) network. An alternative communication path communicatively couples communication devices of the organization to a public communication network. A recovery application operates on devices of the organization. The recovery network receives periodic availability indicators from devices within the organization. The recovery network identifies a communication endpoint of the intended recipient of a communication request using the availability indicators.

Abstract: An access point in a wireless network communicates with multiple mobile stations simultaneously using spatial-division multiple access.

Abstract: The present invention proposes methods and devices for mobile communication deployed on shared bands, which enhance reliability of channels such as control channels. According to an aspect thereof, at a communication terminal, a list of channels useable for communication is maintained, information on the usability of a currently used channel is obtained, and it is switched to one of the channels of the list of useable channels if the currently used channel becomes unusable. The invention encompasses also corresponding computer products as well as methods, devices and computer products residing at a network node.

Abstract: A network element configured to operate in a source routing network, wherein the network element comprises a receiver, a transmitter, and a processor coupled to the receiver and the transmitter. The processor may be configured to cause the network element to receive from an upstream network element, a liveness protection probe comprising a header that comprises a list of one or more ordered connection identifiers that indicate a network path traversing the source routing network through which the liveness protection probe should be forwarded, transmit the liveness protection probe toward a downstream network element according to the connection identifiers, receive the liveness protection probe from the downstream network element, and transmit the liveness protection probe to the upstream network element according to a second list of one or more ordered connection identifiers contained within the header.

Abstract: The present invention enables connection between a wireless sensor node and a service server while reducing load on the wireless sensor node. The wireless sensor node transmits a router solicitation message to a gateway apparatus; the gateway apparatus analyzes the message to extract the discrete information of a device or service, searches for a service server based on such information and acquires the configuration information necessary for execution of a service application of the wireless sensor node; the gateway apparatus multicasts the received router solicitation message into a link; a router within the link receives the router solicitation message, and multicast a router advertisement message which contains the prefix information of an address, etc. into a link; the gateway apparatus sets the acquired configuration information in the router advertisement message and transfers the resultant message to the wireless sensor node; and the wireless sensor node analyzes the message.

Abstract: As described herein, a network device includes an optical circuit switch to perform circuit switching. The network device also has a plurality of removable line cards, each of which includes a packet switch. A switching manager automatically reconfigures the optical circuit switch based on a configuration of the removable line cards to maintain a guaranteed packet switching bandwidth between active line cards.

Abstract: A disclosed example method involves identifying a logical failover circuit comprising an alternate communication path in a failover network that is separate from a logical circuit comprising variable communication paths in at least one of a first logical telecommunications network or a second logical telecommunications network and a fixed communication path between the first and second logical telecommunications networks. The failed logical connection is between the first and second logical telecommunications networks. The failover network is reserved to provide failover circuits to communicate data rerouted from failed logical circuits, and the logical failover circuit identified by a second logical circuit identifier. The logical circuit identifier of the logical circuit is renamed to the second logical circuit identifier of the logical failover circuit when a logical connection in the logical circuit has failed.

Abstract: A method is implemented by a network element or controller for determining a backup path for a fast reroute process to be utilized in response to a network event invalidating a primary path to a destination node. The method identifies at least one intermediate node that has a backup loop free alternative (LFA) path to a destination node in a network where no path meeting LFA conditions can be found for a point of local repair (PLR).

Abstract: A data communications system has a plurality of nodes connected by a plurality of links. A subset of the links and nodes forms a worker path for carrying worker data through the communications system, and a further subset of links and nodes provides a protection path for carrying other data in the absence of a fault in the worker path and for providing an alternative path for the worker data in the event of a fault in the worker path. The alternative path is predetermined prior to the detection of a fault in the worker path.

Abstract: A transmission terminal communicates with a reception terminal using a first communication path (a 60 GHz band) or a second communication path (a 2.4 GHz band or 5 GHz band). A first communication path connection detector 17 detects the connection or disconnection of the first communication path to or from the reception terminal. A throughput measurement section measures the throughputs of the first communication path and the second communication path. On the basis of the result of the detection of the connection or disconnection and the throughputs of the first communication path and the second communication path, a terminal controller judges whether or not to switch a communication path for data transfer. A communication path switch switches the communication path for data transfer to the first communication path or the second communication path.

Abstract: In order to perform protection switching of a frame that is transmitted and received between a packet processor and a host processor, when an input frame is a receiving frame and a signal failure has occurred, by transporting a message including a protection switching command to a packet processor, protection switching is performed. Information representing that protection switching is performed is recorded in a header of the receiving frame, and a frame including a message including a corresponding header is transported to the host processor.

Abstract: In general, various capabilities related to fault-resilient services within communication networks are presented. The services may include broadcast services, multicast services, unicast services, or the like, as well as various combinations thereof. A capability for providing local protection to unicast traffic at a node associated with a pair of redundant trees is presented herein. A capability for providing local protection to multicast traffic at a node associated with a pair of redundant trees is presented herein. A capability for constructing a pair of redundant trees is presented herein. A capability for constructing a pair of redundant trees includes partitioning a graph into a pair of partitions based on a link coloring mechanism and constructing the pair of redundant trees based on the pair of partitions.

Abstract: In general, various capabilities related to fault-resilient services within communication networks are presented. The services may include broadcast services, multicast services, unicast services, or the like, as well as various combinations thereof. A capability for providing local protection to unicast traffic at a node associated with a pair of redundant trees is presented herein. A capability for providing local protection to multicast traffic at a node associated with a pair of redundant trees is presented herein. A capability for constructing a pair of redundant trees is presented herein. A capability for constructing a pair of redundant trees includes partitioning a graph into a pair of partitions based on a link coloring mechanism and constructing the pair of redundant trees based on the pair of partitions.

Abstract: When stored identifying information of a transmission target frame and identifying information of a received frame are equal, a node apparatus updates transmission feasibility information stored in association with the final destination of the received frame. The transmission feasibility information indicates feasibility of transmission to each of a plurality of adjacent node apparatuses being a transmission destination, and is updated so that feasibility of transmission to the transmission destination associated with the identifying information of the received frame indicates that “the transmission is infeasible”. The node apparatus transmits the received frame, when there is no adjacent apparatus to which transmission is feasible, and when the stored identifying information of the transmission target frame is equal to the identifying information of the received frame, to the adjacent node apparatus recognized as the origin in association with the identifying information of the received frame.

Abstract: The present invention relates to a method and a network node for service instance management in telecommunications network. According to the method a plurality of network paths are monitored. A number of network paths form a protection group associated with a service instance or group of service instances. The monitoring of the network paths includes periodic transmission of CCMs on the network paths. To facilitate detection of mismatches related to protection switching, some CCMs include a mismatch information element that specifies traffic status of a working network path and of a protection network path for a set of protection groups. The set of protections groups includes the protection groups which the monitored network path is a member of. A CCM that includes the mismatch information element also includes an indication bit that indicates presence of the mismatch information element in the CCM.

Abstract: A method of supervising a node in a communication system, the communication system comprising a OAM system, a Femto node controlled by the OAM system, and a first communication path between the node and the OAM system, the method comprising the steps of: determining that the node is unable to receive commands sent by the OAM system via the first communication path; establishing a second communication path between the node and the supervising entity via a cellular network; and sending a trigger message to the node via the second communication path to initiate a communication path set up on the first communication path towards the OAM system.

Abstract: A computationally implemented method includes, but is not limited to: intercepting a communiqué that is determined to be affiliated with a source entity and that is addressed to an end user to prevent, at least temporarily, the communiqué from being received by a communication device associated with the end user; and releasing the communiqué to the communication device in response to at least detecting occurrence of one or more environmental aspects associated with the communication device, the releasing of the communiqué being in accordance with one or more conditional directives of the end user to conditionally obfuscate the communiqué determined to be affiliated with the source entity. In addition to the foregoing, other method aspects are described in the claims, drawings, and text forming a part of the present disclosure.

Abstract: A packet relay apparatus of the type that can virtually use in the interlocking arrangement a plurality of apparatuses includes a link optimization adjustment part and a packet analyzing unit, automatically judges the mode of flow of communication and traffic and optimizes the line that is mainly operated, to manage the traffic flowing through a control port and make up for band insufficiency of the control port.

Abstract: To protect a multicast data stream for a multicast group, two P2MP pseudowires are established to deliver multicast data for the particular multicast group to an aggregation node. The two P2MP pseudowires are defined such that the pseudowires have no transport nodes in common other than the aggregation node. The aggregation node replicates data received via a primary pseudowire of the two P2MP pseudowires to subscribers of the multicast group. The aggregation node monitors the data from the primary pseudowire to detect failures in the data flow. When a failure is detected in the primary data stream, the aggregation node replicates data received via a secondary pseudowire of the two P2MP pseudowires for delivery to the multicast group subscribers.

Abstract: A shared (proxy) OAM session is performed in a packet-based network on behalf of a plurality of connections. First and second connections are each routed between respective nodes of the network for carrying data traffic. The second connection shares a portion of the routing of the first connection. The shared OAM session is performed along a path which is co-routed with at least part of the shared portion of the routing of the first connection and the second connection. Failure notification signalling is propagated to an endpoint node of each of the first and second connections when the shared OAM session indicates a failure has occurred. The use of a shared OAM session reduces processing at nodes and reduces OAM traffic. Each connection can be a trunk, such as a PBT/PBB-TE trunk, or a service carried within a trunk.

Abstract: The present invention relates to the development of a device, Cognitive Communication Hub (CCH) that combines multiple and hybrid physical layers to collaborate and establish a unified network. The heterogeneous network so formed supports a whole range of bandwidth and spectrum while providing quality of service and class of service. The routing algorithm of the device is designed to explore the best route that can optimally use hybrid networking technologies to make a connection. The device has multiple interfaces and acts in an adhoc fashion. It forms multiple parallel data paths between source and destination and hence provides fault tolerance as a break down in one path does not disconnect end to end connection.

Abstract: A base station (103) assigns a set of mobile stations (101) to a group wherein the group will share a set of radio resources (710). A shared control channel information element (501) is sent to the group of mobile stations (101) and provides a bitmap having fields for group ordering (511), resource allocations (530), failure handling resources (540), and an ordering pattern (513). If a mobile station fails to decode the shared control channel information element (501) it will access the failure handling resources in order to receive data. The failure handling channel may be persistent in some embodiments, or may be released after the mobile station is once again able to decode the shared control channel information element (501) and thereby share in the shared resource pool allocated to its mobile station group.

Abstract: A circuit is provided to facilitate temporal redundancy for inter-chip communication. When an inter-chip communication channel fails, data bits associated with the faulty channel are steered to a non-faulty channel and transmitted via the non-faulty channel together with data bits associated with the non-faulty channel at an increased data rate.

Abstract: User equipment, systems, apparatuses, methods and/or computer program products are provided to facilitate random access procedures in a wireless communication network. The selection and utilization of uplink and downlink component carriers for conducting contention-free and contention-based random access procedures is facilitated in a multiple component carrier system, where a user equipment is configured with multiple uplink and downlink component carriers.

Abstract: A method implemented for a link aggregation group is disclosed. The link aggregation group contains a local interface and a remote interface. The local interface is a logical interface formed by a plurality of network elements including a local network element and a peer network element. The local network element communicates with the peer network element through an inter-peer link. The method starts with determining that the local network element is active by checking that an aggregate state of the links coupled to the local network element is active. The method continues with detecting an anomaly of the active links and sending a notification to the peer network element about the anomaly. Then method continues with receiving an activation confirmation that the peer network element is ready for switching and switching traffic from the active links to the inter-peer link in response to receiving the activation confirmation.

Abstract: In one example, a network device includes a hardware-based processor, and a Resource Reservation Protocol with Traffic Engineering extensions (RSVP-TE) module executing on the hardware-based processor that establishes a plurality of label switched paths (LSPs) having the network device as a common transit network device. The network device presents a plurality of options for selection, which each specify a different algorithm for selecting LSPs to evict from the link. In response to detecting an over-subscription condition on a link along the plurality of LSPs, the RSVP-TE module selects a subset of the plurality of LSPs to evict from the link, and the RSVP-TE module outputs an error message to one or more ingress network devices associated with the selected subset of LSPs without outputting an error message to the ingress network devices associated with those LSPs not selected for eviction.

Abstract: A method and a system for switching an APS service channel, and an automatic protection switching device are disclosed. The method includes: a first recovered side reaches a wait-to-restore (WTR) state when the first recovered side receives information about transition to the WTR state from a second recovered side if a current state of the first recovered side is a first No Request (NR) state and if a state prior to transition to the first NR state is a Signal Fail (SF) state; and the first recovered side reaches a second NR state upon expiry of a WTR time of the first recovered side after receiving WTR time expiry information sent by the second recovered side. Therefore, the user can know the WTR state of the first recovered side clearly.

Abstract: A system, method, and node for releasing resources in a telecommunications network. The method begins by a node assigning a resource-Identification (ID) to an internal resource within the node. At least one internal resource is allocated by the node for a specific Packet Data Network (PDN) connection. Next, a first message containing a resource-ID of the allocated internal resource is sent to one or more peer nodes. The peer nodes store the received resource-ID from the first message. When a node determines that a malfunction of the allocated internal resource of the node occurs, the node sends a second message containing the resource-ID of the malfunctioning internal resource to the peer nodes. The peer nodes then tear down the PDN connection.

Abstract: In one embodiment, a source routing device (e.g., root device) pre-computes diverse source-routed paths to one or more nodes in a computer network. Upon receiving a particular packet, the device forwards the particular packet on a source-routed first path of the pre-computed diverse paths. In the event the device implicitly detects failure of the first path, then it forwards a copy of the particular packet on a source-routed second path of the pre-computed diverse paths in response. In one embodiment, implicit failure detection comprises seeing a second (repeated) packet with the same identification within a certain time since the first packet, and the second packet is forwarded on the second path. In another embodiment, implicit failure detection comprises not seeing a link-layer acknowledgment returned or receiving an error notification from a node along the broken path, and a stored copy of the particular packet is forwarded on the second path.

Abstract: Various exemplary embodiments relate to a method performed by a network node in a resource reservation protocol (RSVP) based label switch path (LSP) network, the method including: receiving a message to establish a LSP; receiving a resv message; initiating the establishment of a backup path; determining that the establishment of the backup path failed; setting a backup timer; and initiating the establishment of a backup path upon the expiration of the backup timer.

Abstract: Nodes and methods are disclosed for protection and restoration in the event of multiple failures for multiple paths involved for the same service in shared mesh networks, including, a method comprising the steps of storing, in non-transitory memory of a first node in a shared mesh network having a plurality of connections through the shared mesh network, records of global contention handling priority values of the plurality of connections; detecting a first signal from a second node requesting activation of a first connection of the plurality of connections, and a second signal from a third node requesting activation of a second connection of the plurality of connections, the first and second connections having overlapping requirements; determining that the second connection has a higher global contention handling priority value than the first connection based at least in part on the records; and activating the second connection.

Abstract: Transport control server (TCS) in a network system including a first backup path (FBP) with predetermined first bandwidth (PFB) secured or reserved between any node pair, second backup path (SBP) with predetermined second bandwidth (PSB) secured or reserved between any node pair, the FBP and SBP sharing a link, each node forwards data according to path setting information. The TCS including: a storage section storing, for each path, an identifier for each node through which the path passes; and a control processing section performing: upon switchover of first active path to FBP, judging whether PSB of SBP can be secured or reserved by the bandwidth of the shared link through which the FBP passes, by referring to the storage section; if not, identifying nodes through which the SBP passes, by referring to the storage section; and transmitting a setting change notification to delete the SBP to the identified nodes.

Abstract: A method performed by a provider edge device includes generating pseudo-wire tables based on virtual private local area network service advertisements from other provider edge devices, where the provider edge device services customer edge devices, and establishing pseudo-wires with respect to the other provider edge devices, based on the pseudo-wire tables, where the pseudo-wires include an active pseudo-wire and at least one standby pseudo-wire with respect to each of the other provider edge devices. The method also includes generating and advertising VPLS advertisement to the other provider edge devices, detecting a communication link failure associated with one of the customer edge devices in which the provider edge device services, and determining whether the at least one standby pseudo-wire needs to be utilized because of the communication link failure.

Abstract: In one embodiment, active links are added to, and removed from, a multichassis link bundle with one side of the multichassis link bundle terminated on multiple devices of a multichassis device. In one embodiment, adding active links includes selecting which particular device to which to add an active link to the multichassis link bundle based on a device priority of each of the multiple devices, with a device priority of a given device being based on a current number of active links associated with the given device.

Abstract: Embodiments disclosed herein provide redundant connectivity between an Ethernet Automatic Protection Switching (EAPS) access network and a Virtual Private LAN Service (VPLS) network. A first VPLS node is provided to function as an EAPS controller node. A second VPLS node is provided to function as an EAPS partner node. The first and second VPLS nodes are linked by a pseudowire and an EAPS shared-link. Additional EAPS nodes are also provided. The additional EAPS nodes are linked to each other and one of the additional EAPS nodes is designated as a master node. Links are also established between the VPLS nodes and the EAPS nodes such that one or more EAPS rings are formed. Each EAPS ring includes the shared-link between the first and second VPLS nodes. The EAPS rings are monitored to detect link failures.

Abstract: There is provided an improved redundancy method for a communication network. The invention is based on the insight that a hitless failover can be performed by at the receiving node using a single common indexed play-out buffer in which a selective reconstruction of the transported data stream utilizing individual pieces, i.e. frames or packages, of a data stream received over multiple links is performed.

Abstract: Alarm reporting systems and methods for reporting alarms to a central monitoring station using fixed mobile convergence (FMC) techniques. An alarm reporting system comprises a plurality of sensors, an alarm reporting module that receives alarm signals from the plurality of sensors, and a logic unit that generates an alarm message related to the alarm signal. The alarm reporting module further comprises at least two transceivers, the first of which is a wi-fi transceiver that communicates with a central monitoring station via a wireless access point further connected to an internet connection. The second transceiver is a cellular tranceiver that communicates with the central monitoring station via a cellular network further connected to an internet gateway. The second tranceiver provides redundancy in case the wireless access point or the first internet connection become unavailable.

Abstract: In one embodiment, a packet switching device sends packets to be sent from a single link of a bundled link interface to multiple egress network processing units (on a same or different line cards). A single one of these multiple egress network processing units is configured to be in the active mode sending particular sets of packets. The other egress network processing units are configured for these particular sets of packets to be in the non-active mode, and hence, will correspondingly drop these particular sets of packets. In case of failure, an egress network processing unit can quickly (e.g., changing a flag) be changed to the active mode to quickly reduce or eliminate loss of packets.

Abstract: Energy efficient Ethernet with asymmetric low power idle. Low power idle mode is typically leveraged when both direction of a link do not have data traffic to transmit. Such a requirement reduces the application of low power idle due to the frequent existence of data traffic in only one direction. An asymmetric low power idle mode enables reduction in power consumption and signal emissions even when one direction has data traffic to transmit.

Abstract: A first network element in an MPLS network receives a first label advertised from a second network element in the network. The first network element computes a shortest path tree (SPT) to reach a destination network element under a potential failure condition. The second network element is a nexthop of the first network element in the computed SPT and is not upstream from the potential failure condition in the computed SPT. The first network element determines that a third network element in the network is a Point of Local Repair (PLR) when the potential failure condition is realized. The first network element distributes a second label to the third network element for a backup LDP Label Switched Path (LSP) that will serve as a backup path when the potential failure condition is realized. The first network element installs a swap action from the second label to the first label.

Abstract: A method and apparatus that promote expedited fast link failover decisions by and end station with redundant multilayer switching paths to a network are disclosed. In response to detecting a change in connectivity with an upstream link to a network, an upstream switch may send a notification to an intermediate switch with a downstream link to the end station. In response to the notification, the intermediate switch may disable (“bring down”) the downstream link to the end station. Bringing the downstream link down in this manner may cause the end station to switch (“failover”) to a different downstream link, for example, allowing the end station to establish connectivity to the network via a redundant path.