EP0905948A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Rate adaptation for ADSL using a variable number of subcarriers
Assignee: NXP USA Inc
•
Filing: 1998-09-21
•
Granted: —
•
Expires: 2018-09-21
Abstract
Abstract The present invention comprises a remote terminal (20) and a central office (30) as part of and ADSL system (10). Once a communication channel is open between the remote terminal (20) and the central office (30), the remote terminal (20) transmits channel specific information, application specific information, or both to the central office (30). Once the central office (30) receives the information, the central office (30) can select data rate options optimized for the downstream receiver (the remote terminal (20)). Based on the application specific and/or channel specific information, the central office (30) can use a combination of calculations and look-up tables to formulate new options. When the remote terminal (20) sends channel specific information, the central office (30) can perform calculations which determine performance margins at various data rates.
Inventors
- 👤 Howard E. Levin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 08:04
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/0001; H04L1/0002; H04L1/0023; H04L1/0026; H04L5/00; H04L5/003; H04L5/0044; H04L5/0046; H04L5/0058; H04L5/006; H04L5/0091; H04L1/0025; H04L5/0001; H04L5/0003; H04L5/0005; H04L5/0007
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
61 words
A method of configuring a communication system, the
method comprising the steps of: providing a communication system (10) having a
first transceiver (24,32) and a second
transceiver (32, 24); the first transceiver (24,32) determining a usable
number of carriers; and the second transceiver (32, 24) determining a
reception rate of the first transceiver (24,32)
based upon the usable number of carriers.
Claim 2
Dependent Claim
52 words
The method of claim 1, further comprising the steps of: the first transceiver (24,32) determining a
performance margin at a specified capacity;
and the second transceiver (32, 24) determining a
reception rate of the first transceiver (24,32)
based upon the usable number of carriers and
the performance margin at the specified
capacity.
Claim 3
Dependent Claim
44 words
The method of claim 1, further comprising the steps of: the first transceiver (24,32) determining a channel
capacity; and the second transceiver (32, 24) determining a
reception rate of the first transceiver (24,32)
based upon the channel capacity and the usable
number of carriers.
Claim 4
Dependent Claim
82 words
The method of claim 1 further comprising the steps of: the first transceiver (24,32) transmitting a first
plurality of suggested data rates to the second
transceiver (32, 24); the second transceiver (32, 24) calculating a second
plurality of suggested data rates based upon
the usable number of carriers; the second transceiver (32, 24) transmitting the
second plurality of suggested data rates to the
first transceiver (24,32); and configuring the first transceiver (24,32) at one of
the second plurality of suggested data rates.
Claim 5
Dependent Claim
96 words
An ADSL remote terminal device (20) comprising: a means for calculating a maximum data rate; a means for calculating a number of usable carriers; a means for calculating a performance margin; a means for transmitting the maximum data rate, the
number of usable carriers, and the performance
margin to an ADSL central device; a means for receiving a calculated reception rate
based upon the maximum data rate, the number
of usable carriers, and the performance
margin; and a means for configuring a reception rate of the ADSL
remote terminal device based upon the
calculated reception rate.
Claim 6
Independent Claim
53 words
A method for communicating over a multicarrier
communication channel, the method comprising: providing a first data rate value; providing a second data rate value based upon the
multicarrier communication channel; and determining a performance margin of the
multicarrier communication channel at the
first data rate value based upon the second
data rate value.
Claim 7
Dependent Claim
60 words
The method of claim 6, further comprising the steps of: providing a number of usable bins at the second data
rate value; and the step of determining the performance margin
further comprises determining the
performance margin of the multicarrier
communication channel at the first data rate
value based upon the second data rate value and
the number of usable bins.
Claim 8
Dependent Claim
54 words
The method of claim 6, further comprising the steps of: providing an incremental signal-to-noise ratio value;
and the step of determining the performance margin
further comprises determining the
performance margin of the multicarrier
communication channel at the first data rate
value based upon the second data rate value and
the incremental signal-to-noise ratio value.
Claim 9
Dependent Claim
125 words
The method of claim 8, further comprising the steps of: providing a number of usable bins at the second data
rate value; and the step of determining the performance margin
further comprises determining the
performance margin of the multicarrier
communication channel at the first data rate
value based upon the second data rate value
the incremental signal-to-noise ratio value
and the number of usable bins; providing a performance margin value at the second
data rate value; and the step of determining further comprises
determining the performance margin of the
multicarrier communication channel at the
first data rate value based upon the second
data rate value, the incremental signal-to-noise
ratio value, the number of usable bins,
and performance margin value at the second
data rate value.
Claim 10
Dependent Claim
61 words
The method of claim 6 further comprising the steps of: providing a performance margin value at the second
data rate value; and the step of determining further comprises
determining the performance margin of the
multicarrier communication channel at the
first data rate value based upon the second
data rate value and the performance margin
value at the second data rate value.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.