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Patent US5394392A successfully refreshed from Google Patents.
US5394392A
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US
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Method for transferring information using modems
Assignee: Paradyne Corp
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Filing: 1992-12-14
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Granted: 1995-02-28
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Expires: 2012-12-14
Abstract
Abstract A modem's data reception rate is increased by decreasing the amplitude of the signals transmitted by the modem. Decreasing the amplitude of the transmitted signals reduces the amplitude of the resulting echoes, and thereby reduces the residual echoes that remain after echo cancellation. Reducing the residual echoes permits increasing the data reception rate. Decreasing the amplitude of the transmitted signals also involves decreasing the data transmission rate; however, asymmetrical data transfer rates are acceptable for many modem applications.
Inventors
- 👤 Robert E. Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:05
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/20; H04B3/23
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
159 words
A method for transferring information between communication devices, over a communication channel having a near end and a far end, said method, comprising the steps of: transmitting a first plurality of symbols from the near end of the communication channel to the far end of the communication channel with a first average signal level at the near end of the communication channel; receiving a second plurality of symbols at the near end of the communication channel that are transmitted from the far end of the communication channel with a second average signal level at the far end of the communication channel, said second average signal level being substantially higher than said first average signal level; using overlapping portions of the communications channel's bandwidth for transmitting and receiving symbols; and at least one of said communication devices monitoring a backlog of information to be transmitted and changing said first and second average signal levels when said backlog crosses a threshold.
Claim 2
Independent Claim
159 words
A method for transferring information between communication devices, over a communication channel having a near end and a far end, said method, comprising the steps of: transmitting a first plurality of symbols from the near end of the communication channel to the far end of the communication channel with a first average signal level at the near end of the communication channel; receiving a second plurality of symbols at the near end of the communication channel that are transmitted from the far end of the communication channel with a second average signal level at the far end of the communication channel, said second average signal level being substantially higher than said first average signal level; using overlapping portions of the communications channel's bandwidth for transmitting and receiving symbols; and at least one of said communication devices monitoring a backlog of information to be transmitted and changing said first and second average signal levels when said backlog crosses a threshold.
Claim 3
Dependent Claim
42 words
The method of claim 1 wherein the step of monitoring a backlog of information to be transmitted comprises changing said first and second average signal levels so that said first average signal level is substantially higher than said second average signal level.
Claim 4
Independent Claim
157 words
A method for transferring information between modems, over a communication channel having a near end and a far end, said method comprising the steps of: transmitting a first plurality of symbols from the near end of the communication channel to the far end of the communication channel with a first average signal level at the near end of the communication channel; receiving a second plurality of symbols at the near end of the communication channel that are transmitted from the far end of the communication channel with a second average signal level at the far end of the communication channel, said second average signal level being substantially higher than said first average signal level; using overlapping portions of the communications channel's bandwidth for transmitting and receiving symbols; and at least one of said modems monitoring a backlog of information to be transmitted and changing said first and second average signal levels when said backlog crosses a threshold.
Claim 5
Independent Claim
157 words
A method for transferring information between modems, over a communication channel having a near end and a far end, said method comprising the steps of: transmitting a first plurality of symbols from the near end of the communication channel to the far end of the communication channel with a first average signal level at the near end of the communication channel; receiving a second plurality of symbols at the near end of the communication channel that are transmitted from the far end of the communication channel with a second average signal level at the far end of the communication channel, said second average signal level being substantially higher than said first average signal level; using overlapping portions of the communications channel's bandwidth for transmitting and receiving symbols; and at least one of said modems monitoring a backlog of information to be transmitted and changing said first and second average signal levels when said backlog crosses a threshold.
Claim 6
Dependent Claim
42 words
The method of claim 3 wherein the step of monitoring a backlog of information to be transmitted comprises changing said first and second average signal levels so that said first average signal level is substantially higher than said second average signal level.
Claim 7
Dependent Claim
19 words
The method of claim 3, further comprising the step of adding a tone to said first plurality of symbols.
Claim 8
Independent Claim
158 words
A method for transferring information between modems, over a communication channel having a near end and a far end, said method comprising the steps of: transmitting a first plurality of symbols from the near end of the communication channel to the far end of the communication channel with a first average signal level at the near end of the communication channel; receiving a second plurality of symbols at the near end of the communication channel that are transmitted from the far end of the communication channel with a second average signal level at the far end of the communication channel, said second average signal level being substantially higher than said first average signal level; using the same portions of the communication channel's bandwidth for transmitting and receiving symbols; and at least one of said modems monitoring a backlog of information to be transmitted and changing said first and second average signal levels when said backlog crosses a threshold.
Claim 9
Independent Claim
158 words
A method for transferring information between modems, over a communication channel having a near end and a far end, said method comprising the steps of: transmitting a first plurality of symbols from the near end of the communication channel to the far end of the communication channel with a first average signal level at the near end of the communication channel; receiving a second plurality of symbols at the near end of the communication channel that are transmitted from the far end of the communication channel with a second average signal level at the far end of the communication channel, said second average signal level being substantially higher than said first average signal level; using the same portions of the communication channel's bandwidth for transmitting and receiving symbols; and at least one of said modems monitoring a backlog of information to be transmitted and changing said first and second average signal levels when said backlog crosses a threshold.
Claim 10
Dependent Claim
42 words
The method of claim 6 wherein the step of monitoring a backlog of information to be transmitted comprises changing said first and second average signal levels so that said first average signal level is substantially higher than said second average signal level.
Claim 11
Dependent Claim
19 words
The method of claim 6, further comprising the step of adding a tone to said first plurality of symbols.
References Cited (Backward Citations)
US3906166A
Cited
US4335464A
Cited
US4823339A
Cited
US5289459A
Cited
US4860341A
Cited
US4969145A
Cited
US5008901A
Cited
US4811357A
Cited
US4972436A
Cited
US4890316A
Cited
US5007047A
Cited
US5099478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-02-27 | 1998-08-29 | 1999-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-27 | 2002-08-29 | 2003-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-27 | 2006-08-29 | 2007-02-28 | $7700.00 | Window Closed / Lapsed |