US5054034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ensemble modem structure for imperfect transmission media
Assignee: Telebit Corp
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Filing: 1989-06-15
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Granted: 1991-10-01
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Expires: 2009-06-15
Abstract
Abstract A high-speed modem that transmits and receives digital data on an ensemble of carrier frequencies spanning the usable band of a dial-up telephone line. The modem includes a system for variably allocating data and power among the carriers to compensate for equivalent noise and to maximize the data rate. Additionally, systems for eliminating the need for an equalization network, for adaptively allocating control of a channel, and for tracking variations in line parameters are disclosed.
Inventors
- 👤 Dirk Hughes-Hartogs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:57
CPC Classifications
H; H04; H04L; H04L5/00; H04L5/14; H04L5/16; H04L1/00; H04L1/0001; H04L1/0002; H04L1/0003; H04L1/20; H04L1/206; H04L5/003; H04L5/0044
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
323 words
In a communication system of the type including two modems (A and B) coupled by a transmission link, each modem having an input buffer for storing data to be transmitted, a method for allocating control of the transmission link between modem A and B comprising the steps of: allocating control of the transmission link to modem A; determining the volume of data stored in the input buffer of modem A; determining the number, k, of packets of data required to transmit the volume of data stored in the input buffer of modem A; transmitting L packets of data from modem A to modem B where L is equal to I A if K is less than I A , and where L is equal to K if K is greater than or equal to I A , and where L is equal to N A if K is greater than N A so that the number of packets transmitted by modem A is a minimum of I A and a maximum of N A ; allocating control of the transmission link to modem B; determining the volume of data in the input buffer of modem B; determining the number, J, of packets of data required to transmit the volume of data stored in the input buffer of modem B; and transmitting M packets of data from modem B to modem A where M is equal to I B if J is less than I B , where M is equal to J if J is greater than or equal to I B , and where J is equal to N B if J is greater than N B so that the number of packets transmitted by modem B is a minimum of I B and a maximum of N B ; where allocation of control between modem A and B is dependent on the volume of data stored in the input buffers of
Claim 2
Dependent Claim
323 words
In a communication system of the type including two modems (A and B) coupled by a transmission link, each modem having an input buffer for storing data to be transmitted, a method for allocating control of the transmission link between modem A and B comprising the steps of: allocating control of the transmission link to modem A; determining the volume of data stored in the input buffer of modem A; determining the number, k, of packets of data required to transmit the volume of data stored in the input buffer of modem A; transmitting L packets of data from modem A to modem B where L is equal to I A if K is less than I A , and where L is equal to K if K is greater than or equal to I A , and where L is equal to N A if K is greater than N A so that the number of packets transmitted by modem A is a minimum of I A and a maximum of N A ; allocating control of the transmission link to modem B; determining the volume of data in the input buffer of modem B; determining the number, J, of packets of data required to transmit the volume of data stored in the input buffer of modem B; and transmitting M packets of data from modem B to modem A where M is equal to I B if J is less than I B , where M is equal to J if J is greater than or equal to I B , and where J is equal to N B if J is greater than N B so that the number of packets transmitted by modem B is a minimum of I B and a maximum of N B ; where allocation of control between modem A and B is dependent on the volume of data stored in the input buffers of
Claim 3
Dependent Claim
340 words
In a communication system of the type including two modems (A and B) coupled by a transmission link, each modem having an input buffer for storing data to be transmitted, a system for allocating control of the transmission link between modem A and B comprising: means for allocating control of the transmission link to modem A; means for determining the volume of data stored in the input buffer of modem A; means for determining the number, k, of packets of data required to transmit the volume of data stored in the input buffer of modem A; means for transmitting L packets of data from modem A to modem B where L is equal to I A if K is less than I A , and where L is equal to K if K is greater than or equal to I A , and where L is equal to N A if K is greater than N A so that the number of packets transmitted by modem A is a minimum of I A and a maximum of N A ; means for allocating control of the transmission link to modem B; means for determining the volume of data in the input buffer of modem B; means for determining the number, J, of packets of data required to transmit the volume of data stored in the input buffer of modem B; and means for transmitting M packets of data from modem B to modem A where M is equal to I B if J is less than I B , where M is equal to J if J is greater than or equal to I B , and where J is equal to N B if J is greater than N B so that the number of packets transmitted by modem B is a minimum of I B and a maximum of N B ; where allocation of control between modem A and B is dependent on the volume of data stored in the input buffers of modems A and B.
Claim 4
Dependent Claim
340 words
In a communication system of the type including two modems (A and B) coupled by a transmission link, each modem having an input buffer for storing data to be transmitted, a system for allocating control of the transmission link between modem A and B comprising: means for allocating control of the transmission link to modem A; means for determining the volume of data stored in the input buffer of modem A; means for determining the number, k, of packets of data required to transmit the volume of data stored in the input buffer of modem A; means for transmitting L packets of data from modem A to modem B where L is equal to I A if K is less than I A , and where L is equal to K if K is greater than or equal to I A , and where L is equal to N A if K is greater than N A so that the number of packets transmitted by modem A is a minimum of I A and a maximum of N A ; means for allocating control of the transmission link to modem B; means for determining the volume of data in the input buffer of modem B; means for determining the number, J, of packets of data required to transmit the volume of data stored in the input buffer of modem B; and means for transmitting M packets of data from modem B to modem A where M is equal to I B if J is less than I B , where M is equal to J if J is greater than or equal to I B , and where J is equal to N B if J is greater than N B so that the number of packets transmitted by modem B is a minimum of I B and a maximum of N B ; where allocation of control between modem A and B is dependent on the volume of data stored in the input buffers of modems A and B.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |