Abstract: The system for interconnecting circuit-based terminal devices with packet-based terminal devices in a voice communication connection (packet-based terminal device addressing system) provides service capabilities that allow a calling party to address packet-based terminal devices without consuming telephone numbers. In this case, the calling party, using a circuit-based terminal device such as a traditional telephone or video telephone, initiates a call to a called party, using the called party's telephone number. The packet-based terminal device addressing system presumes that the owner of the packet-based terminal device also owns a circuit-based terminal device and therefore reuses the point of presence address of the circuit-based terminal device (telephone number) for the packet-based terminal device.

Abstract: A method of synchronizing multimedia telecommunications network-based voicemail and multimedia mail messages with a wireless communications device and an external message recording device. The method includes connecting the wireless communications device to the external device, establishing a call between the wireless communications device and a voicemail/multimedia mail server in the network, exchanging information between the wireless communications device and the voicemail/multimedia mail messages about the subscriber's messages, which messages may be stored on the external device and the voicemail/multimedia mail server, determining the status of the subscriber's messages. If there is at least one new message for the subscriber on the server, then any new messages are downloaded to the external device and the server is updated. If there are no new messages for the subscriber on the server, then a message is played for the subscriber indicating that there are no new messages.

Abstract: A method for mapping a network, in accordance with the present invention, includes providing distance measurements between tracers in the network, determining routes along which the distance measurements are made, and creating a system of equations which links the distance measurements between the nodes with a sum of the delays between the nodes which comprise the routes. Additional information is extracted about distances of subpaths of the routes to provide additional details to a map of the network. The additional information provides a capability of estimation of distances between nodes without tracers.

Abstract: In a UMTS (universal mobile telecommunications system) based system, a wireless receiver comprises a convolutional decoder, a processor and memory. The convolutional decoder processes a received signal and provides a Yamamoto-Itoh (YI) metric to the processor. The processor (a) retrieves, from a look-up table stored in the memory, a compensation factor as a function of the YI metric value provided by the Viterbi decoder; (b) retrieves, from another look-up table stored in the memory, an initial BER estimate as a function of the YI metric; and (c) modifies the initial BER estimate with the retrieved compensation value to provide a BER estimate.

Abstract: The present invention relates to a polymeric composition of matter. The composition includes at least one polymer matrix and plurality of quantum dots distributed therein. The polymer may be a perfluorocyclobutane polymer having high optical transmission at telecommunications wavelengths. The quantum dots may include cap compounds to increase the solubility of the quantum dots in the composition. Typical cap compounds include aromatic organic molecules. Optical devices including waveguides may be fabricated from the polymeric compositions of the invention.

Abstract: A method and apparatus are disclosed for scheduling arriving data packets for input to a switch having a plurality of input channels, and a plurality of output channels, the scheduling method is performed in successive scheduling phases where each scheduling phase further comprises at least log N scheduling iterations. The method is a parallelized weight-driven input queued switch scheduling algorithm which possesses good bandwidth and delay properties, is stable, and can be configured to offer various delay and quality of service (QoS) guarantees. The scheduling method utilizes envelope scheduling techniques and considers partially filled envelopes for scheduling.

Abstract: Traffic demands are routed across links of an information network so as to avoid congestion and allow for future traffic growth. Traffic demands from a source node to a destination node of the network are monitored, including bandwidths associated with each of the demands. For each demand, and for a given link of the network, that portion of the bandwidth associated with each traffic demand which is provided by the given link, is determined. A maximum value of link utilization among all links of the network is then determined, wherein link utilization is defined as the amount of bandwidth used by all traffic demands routed through a given link with respect to a total capacity of the link. Traffic demands are then routed across the links of the network in such a manner as to minimize the maximum value of link utilization.

Abstract: A method for correcting the phase of a clock in a data receiver which receives a data flow representing different signal levels with logical high and low signal values and signal transitions positioned therebetween, wherein the positions of such signal transitions between respective two adjacent logical signal values are evaluated for correcting the phase of the clock. The position of a signal transition between a first pair of signal values on one level (11) or a second pair of signal values on the other level (00) is weighted stronger in the evaluation then the positions of signal transitions between adjacent single signal values (1,0) of different signal levels.

Abstract: A method and apparatus for restarting a GPS-based timing system without a GPS signal is provided. More specifically, there is provided a system comprising an antenna, a GPS receiver coupled to the antenna and configured to generate a GPS traceable timing signal based on a GPS transmission, and a timing system coupled to the GPS receiver, the timing system comprising a holdover oscillator, timing circuitry coupled to the holdover oscillator and configured to receive the GPS traceable timing signal and to calculate a correction factor for the holdover oscillator, and a non-volatile memory coupled to the timing circuitry, wherein the timing circuitry is configured to store the correction factor on the non-volatile memory.

Abstract: A method and apparatus for carrierless amplitude and phase CAP encoding of data in a manner avoiding the use of pulse shaping filters for in-phase and quadrature impulse signals. Specifically, in-phase and quadrature vector arithmetic structures (VAS) to adapt respective in-phase and quadrature impulse components to produce appropriate shaped in-phase and quadrature components.

Abstract: An amplifier bias system and method has only reduced resonances at least throughout the envelope frequency of the signal to be amplified. Thus, the amplifier bias system can provide bias current to the amplifier with minimal voltage variations over the envelope frequency band, especially during signal peaks. For example, the amplifier bias system can be used as an amplifier gate or drain bias network where the amplifier bias system is coupled between the power supply and the gate or drain terminals of the amplifier. The amplifier bias system can include an amplifier bias filter having an impedance which is relatively low at least throughout the envelope frequency of the input signal and relatively high at radio frequency.

Abstract: A base station switching system includes a wireless unit that waits before switching from a previous base station to a new base station after the wireless unit has indicated to the wireless communications system the identity of the new base station. Thus, the wireless unit continues to receive data from the previous base station, and the data forwarded to the previous base station will not be lost. For example, whenever a wireless unit decides to switch to a new base station, the wireless unit sends an indication to the wireless communications system of the identity of the selected base station. Before the wireless communications system can forward the data to the new base station, the wireless communications system continues to forward data to the previous base station. To avoid losing such data, the wireless unit continues receiving data from the previous base station.

Abstract: A method is disclosed comprising placing a first device in an enclosure, placing a second device in the enclosure, sealing the enclosure, and after sealing the enclosure, causing the first device to exchange a key with the second device. After the key exchange, the first and second devices can be taken out of the enclosure and can use the key to communicate with each other securely and in an authenticated manner. The devices may be electronic devices or optical devices. The enclosure prevents electromagnetic radiation of a certain bandwidth from escaping and thus prevents an adversarial device from eavesdropping on communication between the first and second devices. The enclosure may include a filtering material such as a metal net. The enclosure may be, for example, a plastic bag or a glass container.

Abstract: A coupler assembly for an optical backplane system having a backplane and two or more circuit packs connected to that backplane. Each circuit pack has an optical transceiver and the backplane has an optical pipe (e.g., an array of waveguides) adapted to guide optical signals between the transceivers of different circuit packs. A coupler assembly is provided for each transceiver to couple light between that transceiver and the optical pipe. Advantageously, the coupler assembly has a movable optical element that can accommodate possible misalignment between the backplane and the circuit pack. In one embodiment, the movable optical element is an array of MEMS mirrors, each mirror adapted to direct light between an optical transmitter or receiver and the corresponding waveguide of the optical pipe.

Abstract: A DPRAM is placed in the RF path before the digital to analog converter, to provide dynamic path gain compensation to the digital signal prior to conversion to an analog signal. The DPRAM stores corrections to the signal to compensate for amplitude losses in the signal arising from heat and non-linearities. The DPRAM has two sets of identical addresses. A logic switch, alternately directs an input signal to one of the two sets of addresses. Pre-calculated signal values which compensate for path gain are stored in one of the two sets of addresses in the DPRAM. The signal input to the DPRAM is directed to the other block. The value of the signal input to the DPRAM will determine the address to which the new value can be found. It is this new value which is actually input to the DAC and from which an analog signal is created.

Abstract: In general terms one embodiment of the present system and method is for a network to send a notification to subscribers regarding a new feature introduction. The method may have the steps of: generating a notification message regarding a new feature; sending the notification message to at least one mobile subscriber; sending a response to the network that indicates that the at least one mobile subscriber desires to try the new feature; storing the new feature with an expiration time in a subscriber database; detecting, by the network, an end of the expiration time for the at least one mobile subscriber; and sending, by the network, a feature expiration notification message to the at least one mobile subscriber regarding subscribing to the new feature. The system implements the method.

Abstract: A nonlinear phase-shift compensation method and apparatus is provided for improving system performance in optical transmission systems. The apparatus includes a phase-shift compensating device that provides a partial compensating phase shift to reduce the nonlinear phase noise resulting from self-phase modulation and amplified spontaneous emissions in an optical transmission system.

Abstract: A wavelength-tracking dispersion compensator (WT-DC) tracks the wavelength of a received input signal. The WT-DC includes an input signal optical monitor, a differential detector control circuit, a temperature controller, and an input signal dispersion compensator. The monitor includes a Mach-Zehnder interferometer that matches the dispersion compensator free-spectral range or an integer sub-multiple or multiple thereof. The monitor is coupled to the differential detector control circuit that controls a temperature controller to set the temperature of the monitor and dispersion compensator. The WT-DC automatically tracks the wavelength of the input signal. In a preferred embodiment, the monitor and the dispersion compensator are integrated on the same planar lightwave circuit chip and include a half-wave plate.

Abstract: A method for controlling data flow including: measuring an source specific incoming data rate of one source; comparing the source specific incoming data rate with a corresponding predetermined data rate; if the source specific incoming data rate exceeds the predetermined data rate, eliminating incoming data packets for reducing the source specific incoming data rate to be smaller than the predetermined data rate, if the source specific incoming data rate does not exceed the predetermined data rate, transmitting the incoming data packets to switching means, connected to said input port, characterised in that a backpressure warning signal (bpws) is generated if the source specific incoming data rate exceeds at least one of the at least one predetermined data rates and said generated backpressure warning signal is sent to a source of the incoming data packets. Hereby further transmission of data packets is prevented.

Abstract: An architecture to support service features for wireless calls in a wireless telecommunication system is disclosed. Service feature administration for a wireless terminal is provided by a packet data feature server in a home network that is connected to a packet data network. During call setup on behalf of the wireless terminal, the feature server is accessed via the packet data network to manage service features that are specific to the wireless terminal.