Methods for multiframe alignment
AssigneeADC Telecommunications, Inc.
InventorsMichael Geile, Brian Anderson, Jeffrey Brede, Robert Kirscht, Michael Fort, Mark Elpers
Life of this patent
Estimating the term…
Abstract
Methods for multiframe alignment are provided. In one embodiment, a method comprises sharing upstream bandwidth capacity among a plurality of remote units in a manner that permits at least two of the remote units to transmit to a host at any one time using the upstream bandwidth capacity, the upstream bandwidth capacity provided by using orthogonal frequency division multiplexing with a plurality of tones; and causing at least one remote unit to adjust the timing of transmissions transmitted on at least one of the plurality of tones in order to improve alignment of multiframes received at the host.
Claims16
A method comprising:
- sharing upstream bandwidth capacity among a plurality of remote units in a manner that permits at least two of the remote units to transmit to a host at any one time using the upstream bandwidth capacity, the upstream bandwidth capacity provided by using orthogonal frequency division multiplexing with a plurality of tones;
- and
- causing at least one remote unit to adjust the timing of transmissions transmitted on at least one of the plurality of tones in order to improve alignment of multiframes received at the host.
A method comprising:
- receiving at a host a plurality of upstream symbols transmitted from a plurality of remote units on a plurality of tones using orthogonal frequency division multiplexing;
- determining a timing error for at least one remote unit based on an alignment of a multiframe;
- and
- causing the at least one remote unit to adjust the manner in which transmissions are transmitted therefrom based on the timing error.
A method for an orthogonal frequency division multiplexing multipoint-to-point communications system, the method comprising:
- receiving an orthogonal frequency division multiplexing waveform at a multipoint-to-point host unit, the orthogonal frequency division multiplexing waveform comprising a plurality of tones transmitted by a plurality of remote units;
- estimating a timing error for at least one remote unit, the timing error indicative of an alignment of a predetermined grouping of symbols received at the multipoint-to-point host unit;
- and
- adjusting a manner in which transmissions are transmitted by the at least one remote unit based on the timing error to improve an alignment of the predetermined grouping of symbols when received at the multipoint-to-point host unit.
Dependencies are inferred from the claim text.