Spectrum and bin reassignment protocol for ADSL
AssigneeAgere Systems Inc.
InventorAjit Reddy
Life of this patent
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Abstract
A system and method for improving communications, wherein Frequency Division Multiplexed (FDM) modems are communicatively coupled over a bi-directional channel. Bandwidth is apportioned to satisfy a desired downstream-to-upstream data rate ratio by measuring upstream and downstream channel parameters and determining a data rate ratio. The determined ratio is compared to the desired ratio, and if the determined ratio is less than the desired ratio, the bandwidth is adjusted, and the process repeats until the desired ratio is obtained.
Claims28
In a system containing a modem which is communicatively coupled to a bi-directional channel, a method of apportioning bandwidth between an upstream and a downstream portion of the channel so as to satisfy a desired downstream to upstream data rate ratio, comprising the steps of:
- a) measuring at least one upstream and downstream channel parameter for a prevailing bandwidth apportionment;
- b) determining, from the measured parameters, a downstream to upstream data rate ratio;
- c) comparing the determined ratio to the desired ratio, and if the determined ratio is less than the desired ratio;
- and
- d) adjusting the bandwidth apportionment and repeating steps a) to c).
A system containing a modem which is communicatively coupled to a bi-directional channel, and further containing an upstream and a downstream portion of the channel, which system includes apparatus to satisfy a desired downstream to upstream data rate ratio, where the system further includes:
- a) measuring protocol to measure at least one upstream and downstream channel parameter for a prevailing bandwidth apportionment,
- b) a secondary protocol, responsive to the measuring means for determining, from the measured parameters a downstream to upstream data rate ratio,
- c) a comparator comparing the determined ratio to the desired ratio, and
- d) a control protocol, responsive to the comparison, to adjust a prevailing bandwidth apportionment if the determined ratio is less than the desired ratio.
In a modem communicatively coupled to a second modem via a bi-directional channel, a method of apportioning bandwidth between an upstream and a downstream portion of the channel to satisfy a desired downstream to upstream data ratio, comprising the steps of:
- a) measuring at least one downstream channel parameter for a prevailing bandwidth apportionment;
- b) receiving from the second modem at least one upstream channel parameter;
- c) determining from the measured and received parameters a downstream to upstream data rate ratio;
- and
- d) adjusting the prevailing bandwidth apportionment and repeat steps a) through c) if the determined ratio is less than the desired ratio.
In a modem communicatively coupled to a second modem via a bi-directional channel, a method of apportioning bandwidth between an upstream and a downstream portion of the channel to satisfy a desired downstream to upstream data ratio, comprising the steps of:
- a) measuring at least one upstream channel parameter for a prevailing bandwidth apportionment;
- b) transmitting the measured parameter to the second modem;
- c) receiving from the second modem a new prevailing bandwidth apportionment if sent;
- and
- d) repeating steps a) through c) if the new prevailing bandwidth apportionment is received.
Dependencies are inferred from the claim text.