Multi-link SAR for bonding ATM cell-streams
Granted: December 18, 2007
Patent Number:
7310310
Systems and methods are described for bonding asynchronous transfer mode permanent virtual circuits using a multi-link segmentation and reassembly sublayer. A method includes: transforming a plurality of streams of asynchronous transfer mode cells into a stream of bonded asynchronous transfer mode cells, the plurality of streams of asynchronous transfer mode cells provided by a first plurality of permanent virtual circuits; demultiplexing the stream of bonded asynchronous transfer mode…
Bonding multiple G.shdsl links
Granted: January 9, 2007
Patent Number:
7161953
Systems and methods are described for bonding multiple G.shdsl links. A method includes transporting digital data including: coupling a first end of a plurality of unbundled network elements to a first modem; coupling a second end of the plurality of unbundled network elements to a second modem; applying a single signal to the first modem; time division multiplexing the single signal into a plurality of signals at the first modem; transmitting the plurality of signals to the second modem…
Multi-link segmentation and reassembly sublayer for bonding asynchronous transfer mode permanent virtual circuits
Granted: January 2, 2007
Patent Number:
7158523
Systems and methods are described for bonding asynchronous transfer mode permanent virtual circuits using a multi-link segmentation and reassembly sublayer. A method includes: transforming a stream of asynchronous transfer mode cells into a stream of bonded asynchronous transfer mode cells; demultiplexing the stream of bonded asynchronous transfer mode cells into a plurality of streams of inverse multiplexed bonded asynchronous transfer mode cells; and transmitting the plurality of…
Using a common link field key
Granted: December 12, 2006
Patent Number:
7149740
Systems and methods are provided for interfacing between an element management system and a network management system in a network. A method includes associating a plurality of physical elements of a network with at least one element management system; providing a network management system; and providing a generic management information base interfacing between the at least one element management system and the network management system. The generic management information base includes a…
Long subscriber loops using automatic gain control mid-span extender unit
Granted: November 28, 2006
Patent Number:
7142619
Systems and methods are described for long subscriber loops using automatic gain control. A method includes extending a digital subscriber loop including: producing an output signal in a first direction from a variable gain amplifier at a mid-span extender unit responsive to an input signal in the first direction from the digital subscriber loop; monitoring a signal strength of said output signal in the first direction at the mid-span extender unit; generating a gain control signal…
Pilot tracking for synchronization using correlation between digital signal and locally generated version of PN signal
Granted: October 31, 2006
Patent Number:
7130332
A method of tracking a pilot channel to discipline an oscillator includes: downconverting the RF signal to a low frequency that is of the order of, but greater than the chip rate; converting the signal into digital format; computing complex correlations between the received digital signal and local replicas of the PN codes; and establishing from the correlation values what is the nominal frequency error of the local oscillator. Correlation values between the digital signal {s(n)} and at…
Miniature gas cell with folded optics
Granted: June 20, 2006
Patent Number:
7064835
A miniature optical system for use in instruments based on laser spectroscopy of atomic and molecular samples, such as atomic frequency standards and magnetometers. The miniature optical system employs a folded optical path that allows light from a laser diode to pass through the cell twice, reflecting from a mirror and returning to a photodetector co-located with the laser diode. This efficient packaging arrangement allows the laser diode and photodetector to be fabricated on the same…
Asymmetric digital subscriber line methods suitable for long subscriber loops
Granted: May 2, 2006
Patent Number:
7039103
Systems and methods are described for asymmetric digital subscriber loops. A method includes utilizing a circuit having a first end and a second end, the circuit having a first amplification interface connecting the first end to the second end in a first direction, and a second amplification interface connecting the second end to the first end in a second direction; adapting the first amplification interface to provide a first gain adjustment as a function of a first attenuation of a…
Download booster for ADSL transmission
Granted: February 28, 2006
Patent Number:
7006610
Systems and methods are described for a download booster for ADSL transmission. A method includes extending a digital subscriber loop including: coupling a telephone company central office to a customer premises via the digital subscriber loop; filtering a downstream digital subscriber loop signal at the customer premises; and amplifying the downstream digital subscriber loop signal at the customer premises. A method, includes: providing a digital subscriber loop service to a customer…
Precise network time transfer
Granted: January 10, 2006
Patent Number:
6985499
The invention comprises a method and apparatus for reducing uncertainty in timing on the network. The uncertainty in receive buffers is removed by time stamping the arriving packets before sending the packets to the receive buffer. The uncertainty in the transmission buffer is removed by giving the packets a timestamp in the future, and holding the packets until precisely that time. Time precision is ensured by only releasing time packets at the host physical layer to network boundary at…
Stratum clock state machine multiplexing switching
Granted: September 13, 2005
Patent Number:
6943609
A method includes receiving a pair of input clock signals; utilizing a stratum clock state machine to control a multiplexer; utilizing the multiplexer to switch an input of a main clock between each of the pair of input clock signals; inducing a phase build-out activity; and transmitting an output clock signal.
Light stabilization for an optically excitable atomic medium
Granted: August 9, 2005
Patent Number:
6927636
In an apparatus using optically excited atomic media, such as an atomic frequency standard, a source providing a controlled emission of light for exciting the D1 and/or D2 resonance lines of an alkali gas, such as rubidium or cesium, is controlled by an output generated by digital electronics from the light intensity signal of a light sensor for light transmitted by the alkali gas, an output for representing ambient temperature, and a light intensity-ambient temperature algorithm to…
Synchronization module
Granted: April 5, 2005
Patent Number:
6876242
Systems and methods are described for a core sync module. A method includes receiving a pair of input clock signals; utilizing a stratum clock state machine to control a multiplexer; utilizing the multiplexer to switch an input of a main clock between each of the pair of input clock signals; inducing a phase build-out activity; and transmitting an output clock signal. An apparatus includes a first input clock digital phase-locked loop; a second input clock digital phase-locked loop; a…
Fault detection for subscriber loop repeaters
Granted: January 11, 2005
Patent Number:
6842426
Systems and methods are described for fault detection for subscriber loop repeaters. A method includes monitoring an upstream signal on a digital subscriber loop for a fault detection signal that is added to said upstream signal at a repeater; and determining if a fault has occurred. An apparatus includes a digital subscriber loop fault detection system including: a receiver circuit that monitors an upstream signal on said digital subscriber loop for a fault detection signal that is…
Global positioning system interference detection
Granted: January 11, 2005
Patent Number:
6842498
Systems and methods are described for a GPS receiver capable of functioning in the presence of interference. A method includes detecting an interfering signal including: tuning a band pass filter over a frequency range; and at each of a plurality of incremental frequencies: computing a set of band pass filter coefficients; sending the set of band pass filter coefficients to a digital filter; repeatedly transforming an analog-to-digital converter output having a quantization level in…
Increasing gain with isolating upstream and downstream filters and amplifiers
Granted: December 7, 2004
Patent Number:
6829292
Systems and methods are described for digital subscriber loop repeaters. A method of transforming a digital subscriber loop signals includes increasing a gain with a digital subscriber loop repeater including: isolating an upstream signal band by passing an upstream signal through an upstream pass filter; amplifying the isolated upstream signal with an upstream amplifier; isolating a downstream signal band by passing a downstream signal through a downstream pass filter; and amplifying…
Stratum clock state machine multiplexer switching
Granted: July 20, 2004
Patent Number:
6765424
Methods include receiving a pair of input clock signals; utilizing a stratum clock state machine to control a multiplexer; utilizing the multiplexer to switch an input of a main clock between each of the pair of input clock signals; inducing a phase build-out activity; and transmitting an output clock signal.
Clock recovery or detection of rapid phase transients
Granted: March 16, 2004
Patent Number:
6707329
Systems and method are described for clock recovery or detection of rapid phase transients. An apparatus includes: a numerically controlled oscillator; a phase detector coupled to the numerically controlled oscillator; and a multiplexer coupled to the phase detector and the numerically controlled oscillator, wherein a) the phase detector sets a state variable indicator to either i) a high value when an output phase of the numerically controlled oscillator lags an incoming signal phase,…
Antenna
Granted: February 10, 2004
Patent Number:
6690336
A dielectric-loaded antenna having a plurality of radiating elements and a loop element plated on the surface of a cylindrical ceramic core has balanced and single-ended modes of resonance which are coupled together so as to define an operating frequency band. The two modes of resonance are associated with different respective radio frequency current patterns in the radiating elements, and the input reactance component of the load represented by the antenna at its feedpoint is…
MEMS analog frequency divider
Granted: August 12, 2003
Patent Number:
6605849
The present invention provides an analog frequency divider structure that receives an input signal at a selected frequency and generates an output signal at a fraction, e.g. one-half, of the input frequency. In one embodiment, the analog frequency divider structure is implemented as a MEMS device having a vibratory beam extending along a longitudinal axis between two fixed ends and a piezoelectric transducer coupled to the beam. The MEMS structure further includes a conductive layer…
