Abstract: A mediator for efficiently exchanging management data in a hierarchical management network for managing network elements of a data transport network partitions resources of the network elements among a plurality of management representations of the network elements and selectively forwards management data associated with respective management representations to a higher level of the hierarchy. The mediator modifies the management data so that the higher level (i.e. a northbound element management system or a network management system) receives the management data in a view consistent with the management representation of the network element. Client-based management representations may be created to permit clients to manage selected resources of a network element, and testing-based management representations may be created to facilitate concurrent testing of a network element.

Abstract: A method of installing forwarding state in a link state protocol controlled network node having a topology database representing a known topology of the network, and at least two ports for communication with corresponding peers of the network node. A unicast path is computed from the node to a second node in the network, using the topology database, and unicast forwarding state associated with the computed unicast path installed in a filtering database (FDB) of the node. Multicast forwarding state is removed for multicast trees originating at the second node if an unsafe condition is detected. Subsequently, a “safe” indication signal is advertised to each of the peers of the network node. The “safe” indication signal comprises a digest of the topology database. A multicast path is then computed from the network node to at least one destination node of a multicast tree originating at the second node.

Abstract: The present invention provides an improved random access channel protocol, wherein different user elements may be associated with different priority levels. Based on relative priority, the user elements may have different probabilities for deciding when to retransmit a previously transmitted packet upon receiving information from an access point indicating that the packet needs to be retransmitted. A buffer is provided for storing a packet to transmit, and the buffer is associated with a stack counter, which is incremented or decremented to or from a nominal value to determine when to transmit or retransmit the packet stored in the buffer. Based on the relative priority, feedback information from the access point may cause the stack counter for a packet needing to be retransmitted to stay at the nominal value, wherein retransmission will occur at the next available time slot, or it may increase the stack counter by one or more levels.

Abstract: A network planning tool and method for configuring a connection-oriented packet network over a WDM optical network without an optical control layer, such as a SONET/SDH layer. The optical network includes a plurality of optical fibers interconnected through nodes and the connection-oriented packet network, such an Ethernet network, MPLS network, or pseudowire network, includes two or more terminal devices. The method and tool function by building an association between the components of the physical layer, such as the optical fiber, and their geographic location or path. The connection-oriented packet network is configured by building multi-link trunks (MLTs) between terminal devices, where the MLTs are built by aggregating lightpaths that traverse distinctive geographic paths. The MLTs are planned and configured through aggregating lightpaths that traverse incongruent sets of photonic elements.

Abstract: Forwarding Adjacencies (FAs) can be set up between IP/MPLS routers without requiring a Routing Adjacency (RA) to be brought up for every FA. This enables increased bypass connectivity to be established between end-point routers in the IP/MPLS network without attendant additional processing associated with having dedicated RA for each FA. Where it is possible to modify the end-point routers, the physical ports may be configured to support stand-alone FAs. A configured FA at a physical port is then associated with an IP address of a remote end-point router and a connection within the bypass technology. OAM is used to verify connectivity and configuration across the FA. Alternatively, an emulated Ethernet LAN segment may be used for IP traffic to enable full mesh connectivity to be provided by the bypass technology while requiring only one or a small number of RAs to be implemented at each end-point router.

Abstract: An automated attendant system is made multimedia capable by adding a combined user agent to the automated attendant. A search is done to verify that the caller to the automated attendant has combined user agent capabilities. If so, the caller receives multimedia content from the automated attendant's combined user agent so that the content may be presented on the caller's computer to assist the caller in navigating through the automated attendant's menus and options. Upon selection of a desired connection from the menus and options, the automated attendant's combined user agent helps the caller be connected by voice to the selected connection.

Abstract: The present invention provides a way to associate multimedia clients with telephony devices and create multimedia sessions related to a voice connection between the telephony devices. The telephony devices may be part of a public network or an enterprise network associated with a PBX. Further, calls can be routed in part over packet-switched and circuit-switched networks.

Abstract: Streams of data traffic from various applications may be handled by a network-aware adapter module as part of a greater platform for filtering communicating the streams to intelligent network components. A distinguishing factor associated with a given data stream may be determined and used as a basis for selecting a QoS policy setting for the given data stream. The selected QoS policy setting may then be signaled to a media access control layer to take advantage of the QoS function of the embedded underlying active media type that is active and optimal (both from technical and business perspective) to carry out the communication for the application.

Abstract: Embodiments of the invention include a method for use in a device having a local oscillator. The method includes performing, for the local oscillator that is disciplined by an external reference signal, while locked to the external reference signal, training at least two mathematical models of the oscillator to determine a predicted correction signal for each mathematical model based at least in part on a correction signal that is a function of the external reference signal and which is used to discipline drift in the oscillator. The method also includes selecting a mathematical model of the at least two mathematical models that results in a smallest time error when disciplining the oscillator to use when the external reference signal is unavailable and an alternative correction signal is to be used to discipline drift in the oscillator.

Abstract: Low density parity check code (LDPC) base parity check matrices and the method for use thereof in communication systems. The method of expanding the base check parity matrix is described. Examples of expanded LDPC codes with different code lengths and expansion factors are also shown.

Abstract: A technique for monitoring source addresses through statistical clustering of packets is disclosed. In one particular exemplary embodiment, the technique may be realized by a method for monitoring source addresses through statistical clustering of packets. The method may comprise identifying at least part of a source address of a packet. The method may also comprise searching at least one recorded source address based on the at least part of the source address, the at least one recorded source address being organized into at least one cluster. The method may further comprise routing the packet if the at least part of the source address falls within one of the at least one cluster and the one of the at least one cluster contains at least a predetermined number of source addresses.

Abstract: This invention provides an improved graphical user interface (GUI) for telecommunications network administration. The GUI allows a network administrator to maintain an association between a link bundle and the contents of that link bundle by displaying a network topology including the link bundle, as well as the contents of that link bundle in the same window. The GUI further allows easy navigation between groups of NE's wherein there are a number of inter-group links extending from a particular NE, by displaying characteristics of these links in the same window as a network topology of the NE group under investigation, and allowing the user to follow a selected one of these links to a different NE group.

Abstract: A method of estimating user location involving collecting data from the access points in the network. The data can then be used to define a relationship, for example the loss of power experienced by a transmitted signal, between the access points. The relationship can be stored within a matrix, database or any other suitable storage method that can be referenced to determine the position of a user device within the network and correlated with corresponding measurements from a user device to determine the location of the user device within the network.

Abstract: A system, module and method is provided for metadata extraction and re-insertion. A module has a first input for receiving a compressed digital media stream having metadata such as DPI cues or content related information contained therein and an output for providing a first control signal including metadata information to an encoder. The metadata is extracted from the digital media stream by the module and generates a control signal including the metadata. The encoder module re-encodes the digital media contained in the digital media stream and re-inserts the metadata.

Abstract: A method and apparatus are provided for performing acquisition, synchronization and cell selection within an MIMO-OFDM communication system. A coarse synchronization is performed to determine a searching window. A fine synchronization is then performed by measuring correlations between subsets of signal samples, whose first signal sample lies within the searching window, and known values. The correlations are performed in the frequency domain of the received signal. In a multiple-output OFDM system, each antenna of the OFDM transmitter has a unique known value. The known value is transmitted as pairs of consecutive pilot symbols, each pair of pilot symbols being transmitted at the same subset of sub-carrier frequencies within the OFDM frame.

Abstract: A low noise oscillator includes a resonator 102 that is excited with a pulsed signal (i.e., an impulse of energy) to replace energy lost to parasitic resistive losses once every Nth period (where N=1, 2, 3 . . . ). The resonating signal is monitored by a level detector and when the signal falls below a predetermined threshold, the pulse generator outputs a pulse or adjusts pulse width, pulse amplitude (or both) of a pulsed signal to create the necessary impulse for application to the resonator to recoup losses resulting from resonator operation. A phase shifting circuit may be provided to ensure the pulses are time aligned with the resonating signal to reduce noise.

Abstract: The present invention relates to communications between computing devices. Particularly there is provided a method for enabling communication between a local device of a first network having a predetermined upper layer address space, and a remote device having an upper layer address outside the first network's address space and a lower layer address. In the illustrative embodiments, the present invention enables communication with a remote device as though it were part of a local network by providing a virtual presence for the remote device in the local network address space.

Abstract: A consistent tie-breaking decision between equal-cost shortest (lowest cost) paths is achieved by comparing an ordered set of node identifiers for each of a plurality of end-to-end paths. Alternatively, the same results can be achieved, on-the-fly, as a shortest path tree is constructed, by making a selection of an equal-cost path using the node identifiers of the diverging branches of the tree. Both variants allow a consistent selection to be made of equal-cost paths, regardless of where in the network the shortest paths are calculated. This ensures that traffic flow between any two nodes, in both the forward and reverse directions, will always follow the same path through the network.

Abstract: A communication network includes first and second network entities capable of over-the-air communication. The second network entity receives at least one message communicated over-the-air by the first network entity. The message includes one or more message fields indicating a number of concurrent over-the-air service instances with the second network entity supported by the first network entity. The second network entity limits a number of concurrent over-the-air service instances requested by the second network entity in accordance with the one or more message fields in the message.

Abstract: An edge node of a communication network and method to classify incoming Ethernet traffic based on predetermined criteria. An ingress switch is configured to receive an incoming Ethernet frame. A frame classifier is configured to identify flows and to correlate a flow to a corresponding bandwidth profile and corresponding forwarding treatments defined for the flow.