Abstract: A path computation method is provided. A node device and a path computation element (PCE) are also provided correspondingly. The path computation method includes: sending a path computation request message to the PCE after receiving a client-side service transmission request, the path computation request message carrying identifiers of a source node and a destination node that access a client-side service and carrying a path concatenation constraint; and receiving the path computation response message carrying path information returned by the PCE, the path information being obtained by the PCE through computation according to the identifiers of the source node and the destination node that accesses a client-side service, the concatenation constraint, and concatenation capabilities of each interface of nodes in a network. The technical solution of the present invention is simpler and more convenient, which obviously reduces the complexity of the specific implementation.

Abstract: In a tool for use by network planners in designing metropolitan IP aggregation networks, several optimization methods are integrated into a tool. A k-means algorithm is used to choose access packet switch locations. A dual-k-means algorithm is used to choose the backbone switch locations. Each access packet switch is dual homed to two backbone packet switches using two diverse paths. The diverse path configuration is found using a maxflow-mincost algorithm on a modified fiber map topology. The link topology connecting the backbone packet switches to each other is designed using a heuristic that creates a skeleton network topology and then adds express links one by one, testing each link to assure reduced overall network cost. The resulting network topology is then improved upon by local search.

Abstract: The present invention provides a mechanism for distributing client Virtual Private Network (VPN)-related information within a network using a source-independent distributed advertisement that includes incorporating client VPN-related information related to a node of a network into a source-independent distributed advertisement associated with a routing protocol, distributing the source-independent distributed advertisement from the node of the network to at least one other node of the network, or from another node of the network or a centralized management system to the at least one other node of the network, and updating other VPN-related information with the client VPN-related information related to the node of the network at the at least one other node of the network, wherein the client VPN-related information related to the node of the network is distributed to the at least one other node of the network without requiring the establishment of a Transmission Control Protocol (TCP) session specifically for t

Abstract: An upgraded edge node (e.g., enhanced PBB edge node, enhanced IP/MPLS edge node) and a method are described herein for providing a VLAN service for a customer in a metro network. In addition, a metro network is described herein which includes the upgraded edge nodes, traditional PB edge nodes, and a PB domain that has PB core nodes located therein.

Abstract: A method for performing mode-agile communications during a communications session is disclosed. A communications terminal device supporting multiple modes of access is configured to determine when, during a session involving a first mode of access communications, a second mode of access is available and is to be used for subsequent communications for the session. The communications terminal device initiates or controls switchover from one mode of access to another.

Abstract: A wireless communication base station device capable of improving the reception quality of the MBMS data of UE without wasting wireless resources even if an error occurs in the MBMS data transmitted from an eNB when distributing the MBMS via a wireless access network composed of the eNB and an RS. In the device, a wireless quality determining section (162) outputs reception quality determination information indicating the reception quality between the UE and the device determined on the basis of a CQI included in the NACK signal received from the UE to a retransmission determining section (164). A retransmission data determining section (171) of the retransmission determining section (164) determines MBMS data to be retransmitted from the device and retransmission data (FEC encoding ratio of the MBMS data) to be retransmitted from the RS on the basis of the reception quality determination information inputted from the wireless quality determining section (162).

Abstract: In the field of communications, a method and a system for packet transmission in an optical communication system, and an Optical Line Terminal (OLT) are provided. The method includes: receiving, from a port, a first uplink packet from an Optical Network Unit (ONU), where the first uplink packet includes a Logical Link Identifier (ID); determining a first ID corresponding to the first uplink packet, where the first ID includes an ONU ID or a Port ID; acquiring a Multiprotocol Label Switching (MPLS) tunnel label according to the Logical Link ID and the first ID; and transmitting a second uplink packet on an MPLS tunnel corresponding to the MPLS tunnel label, where the second uplink packet includes data in the first uplink packet and the MPLS tunnel label. The system includes an ONU and an OLT.

Abstract: A system (and a method) are disclosed for reducing intra frame beating effect at frame level and macroblock (MB) level within a video processing system. The frame-level system includes a pre-encoding unit, a reconstruction unit, an intra-beat frame evaluation unit, an intra-beat frame selection unit and an entropy encoding unit. The pre-encoding unit identifies an intra-beat frame of current group of pictures (GOP) and its corresponding intra-beat reference frame, and predicts the intra-beat frame by its intra-beat reference frame. The intra-beat frame evaluation unit calculates an intra-beat frame score. The intra-beat frame selection unit selects an intra-beat frame for re-encoding. The macroblock-level system includes corresponding processing units as frame-level system, but configured to efficiently process MBs. The macroblock-level system allows each MB of an intra-beat frame to be selectively pre-filtered using its intra-beat reference frame.

Abstract: Hosts or end-systems residing at the edges of a network gather data about the traffic they transmit into and receive from the network. The network's routing protocol (typically a link-state protocol such as OSPF) is monitored and routing data or packets are used to recover the network's current status and topology. This data can be collected, fused, and maintained and a platform, preferably distributed, can be provided to query the data, thus enabling a variety of network management applications.

Abstract: The present disclosure provides a system that can receive a group of channels (at least one of which includes an I-frame) from a DSL network, a memory that can store the I-frames, and a channel change detector that can detect a user's selection of a particular channel. If the memory contains the I-frame corresponding to the particular channel and if an I-frame has not been received from the DSL network, then the system provides the stored I-frame from the memory to the user.

Abstract: Various embodiments of the disclosed subject matter provide methods and systems for improved efficiency in spoke-to-spoke network communication. Embodiments provide systems and methods for registering a spoke with a hub, updating at least one database with spoke registration information at the hub, and advertising the spoke registration information to other spokes using a single control plane that includes transport security, peer discovery, and unicast routing information.

Abstract: In a method of enhanced reliability routing within a system including one or more networks having several nodes connected together by communication means, the system using a link-state routing protocol constructing the topology of the nodes within a system of nodes, the routing method determines the logical topology of network interconnection nodes NIN by using modules which perform the following: discovery of the neighborhood by functions of the physical networks; smoothing of the information provided by TNAs to improve the stability of the protocol; distributing the neighborhoods to the set of NINs; relaying of the information associated with a node by a subset of the NIN node; hop by hop enhancement of the reliability of the transmission between various nodes; transmission in point-to-multipoint mode; announcement of oriented characteristics of logical links solely by the source routers of the links; marking of the signaling data so as to manage non-sequencing in reception; and calculation of the global to

Abstract: A system and method to assign paths for data flows through a wide area network. A plurality of data flows is received, wherein a respective data flow in the plurality of data flows includes a respective source address and a respective destination address. An ordering of the plurality of data flows is generated. The ordering of the plurality of data flows are iteratively modified until a cost associated with path assignments for the ordering of the plurality of data flows satisfies a predetermined condition, wherein a respective path assignment for a respective data flow specifies a respective path from a respective source address to a respective destination address. The data flows are executed based on the path assignments for the ordering of the plurality of data flows having the cost that satisfies the predetermined condition.

Abstract: The present invention relates to a station (hereinafter, ‘STA’) operation method and apparatus in a TV whitespace. In a TVWS band, when an STA operating as an unlicensed device with permission to operate in an available channel not used by a licensed device needs to operate in the TVWS band by acquiring information on the available channel, the STA transmits an available channel information request message to a device having database information; receives, from the device having database information, an ACK message for the available channel information that includes (a) identification information on an available channel, (b) information on the maximum allowable power level in the available channel, and (c) information on valid time of the available channel; and transmits/receives a signal using the information of (a), (b) and (c), i.e., using the maximum allowable power level within the valid time in the available channel.

Abstract: In a packet relay method and device which can reduce a congestion of switching even when segment data are concentrated, segment data dividing portions respectively extract a destination address and a packet length from received packets, divide the packets into predetermined length data based on each packet length, and generates location information indicating locations in the packets respectively for the data. The segment data dividing portions add segment headers in which the location information, the destination address, and an address of its own device as a source address are set are added to each of the data, generate segment data, and provide the segment data to switches within a switch card in parallel.

Abstract: A method and communication device for routing unicast and multicast messages. The method for routing a unicast message includes receiving a first control packet including routing parameters from a group header node, updating a routing table based upon the routing parameters, receiving a second control packet including additional routing parameters from a group node, updating the routing table based upon the additional routing parameters and generating a forwarding table from the routing table when both of the updated steps are completed. The unicast message is routed based upon the forwarding table. A method for routing a multicast message comprises receiving the multicast message, determining if a multicast group destination for the multicast message is in a multicast forwarding table (MFT), determining if the multicast message has been previously forwarded and forwarding the multicast message if the message was not previously forwarded and the multicast group destination is in the MFT.

Abstract: A method for identifying alternate end-to-end media paths through internet protocol realms using substitute session description protocol parameters is disclosed. The method includes receiving an session description protocol offer, including a list of previously traversed through internet protocol realms. The method continues with determining the next internet protocol realm for a media path based on unspecified signaling criteria. Finally, the method includes that if the next internet protocol realm to be traversed through is on the list of previously traversed through internet protocol realms, bypassing at least one border gateway associated with the current and previously traversed through internet protocol realms.

Abstract: As microprocessors incorporate more and more devices on a single chip, dedicated buses have given way to on-chip interconnection networks (“OCIN”). Routers in a bufferless OCIN as described herein rank and prioritize flits. Flits traverse a productive path towards their destination or undergo temporary deflection to other non-productive paths, without buffering. Eliminating the buffers of on-chip routers reduces power consumption and heat dissipation while freeing up chip surface area for other uses. Furthermore, bufferless design enables purely local flow control of data between devices in the on-chip network, reducing router complexity and enabling reductions in router latency. Router latency reductions are possible in the bufferless on-chip routing by using lookahead links to send data between on-chip routers contemporaneously with flit traversals.

Abstract: In a broadband access network, calls can be kept active even when a telephone network fails. A voice gateway function captures callee telephone number information sent from a caller subscriber telephone to the telephone network and, when the telephone network fails, keeps the call active by retaining the connection between the caller and the callee. Furthermore, when the telephone network fails, the operation mode of the voice gateway and all ONTs is switched from an H.248 gateway mode to an SIP softswitch mode, allowing the voice gateway function to relay communication packets between ONTs and new call connections to be made in the broadband access network.

Abstract: A system, method, and computer program product are provided for processing different content each stored in one of a plurality of queues. In use, a plurality of different content is identified for processing. Additionally, each of the different content is stored in one of a plurality of queues based on a classification thereof. Furthermore, the plurality of different content stored in the plurality of queues is processed.