Communicating data using wideband communications

• US 8,014,442 B2
• Filed: 05/22/2009
• Issued: 09/06/2011
• Est. Priority Date: 08/31/2001
• Status: Expired due to Fees

• Current Assignee: RPX Corporation
• Original Assignee: Ceres Communications Technologies LLC (IPNav)
• Inventors: Saab, Khaled, Propp, Michael B.
• Primary Examiner(s): VO, DON NGUYEN
• Application Number:
  US12/471,146
• Publication Number:
  US 20090238295A1
• Time in Patent Office: 837 Days
• Field of Search: 375/219, 375/220, 375/222, 375/223, 375/260, 375/257, 375/354
• US Class Current: 375/222
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/16 in which the return channel carries supervisory signals, e.g. repetition request signals
• CPC Class Codes: H04L 2025/03414 Multicarrier
• CPC Class Codes: H04L 2025/03445 Time domain
• CPC Class Codes: H04L 2025/03522 Frequency domain
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0046 Determination of how many bits are transmitted on different sub-channels
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling

Abstract

This disclosure relates to varying load and modulation applied to each of multiple frequency subchannels based on anticipated attenuation experienced by those subchannels. Communicating data includes identifying a static component of a transmission medium for wideband communications having at least two subchannels determining a function of noise is attenuation versus frequency for the static component selecting wideband modulation schemes for the subchannels based on the function determined and communicating a data signal over the subchannels. The transmission medium includes a medium other than a copper telephone wire between and including a carrier facility and a termination of the copper telephone wire at an access point at a user premise and copper telephone wire in a cable riser in multitenant units and multi-dwelling buildings. Independent demodulation functions may be applied to at least two of the subchannels.

Claims

1. A method for communicating data, the method comprising:

detecting, using a first transmitter on a first channel, a state of communications by a second transmitter over a second channel; and

synchronizing transmissions by the first transmitter with transmissions by the second transmitter based on the detected state, wherein the first channel and the second channel are included in a transmission path which includes;

a transmission medium other than a copper telephone wire, a termination of a copper telephone wire at an access point at a user premise, and the copper telephone wire at the user premise.

2. The method of claim 1, wherein the first channel includes a first wire and the second channel includes a second wire that differs from the first wire.

3. The method of claim 1, wherein detecting the state of communications includes detecting a receiving state.

4. The method of claim 1, wherein detecting the state of communications includes detecting a transmitting state.

5. The method of claim 1, wherein the transmission path includes copper telephone wire between the access point at the user premise and a termination of the copper telephone wire within the user premise.

6. The method of claim 1, wherein the transmission path includes a power line.

7. The method of claim 1, wherein the transmission path includes a cable line.

8. The method of claim 1, wherein the transmission path includes a telephone wire other than a copper telephone wire.

9. The method of claim 1, wherein the transmission path includes a radio frequency medium.

10. A method for communicating data, the method comprising:

identifying frequencies in a wideband communication channel that require reduced emissions, wherein the wideband communication channel is over a transmission path which includes;

a transmission medium other than a copper telephone wire, a termination of a copper telephone wire at an access point at a user premise, and the copper telephone wire at the user premise; and

applying a digital frequency-domain filter to a transmitted signal to reduce the emissions of the identified frequencies.

11. The method of claim 10, wherein the transmission path includes copper telephone wire between the access point at the user premise and a termination of the copper telephone wire within the user premise.

12. The method of claim 10, wherein the transmission path includes a power line.

13. The method of claim 10, wherein the transmission path includes a cable line.

14. The method of claim 10, wherein the transmission path includes a telephone wire other than a copper telephone wire.

15. The method of claim 10, wherein the transmission path includes a radio frequency medium.

16. The method of claim 10, wherein identifying the frequencies includes identifying frequencies identified by a regulatory agency for reduced emissions.

17. The method of claim 10, wherein identifying the frequencies includes identifying frequencies that interfere with other devices or communications.

18. A system for communicating data, comprising:

a first transmitter on a first channel; and

a second transmitter on a second channel, wherein the first transmitter is structured and arranged to detect a state of communications by the second transmitter over the second channel and to synchronize transmissions by the first transmitter with transmissions by the second transmitter based on the state detected, wherein the first channel and the second channel are included in a transmission path which includes;

a transmission medium other than a copper telephone wire, a termination of a copper telephone wire at an access point at a user premise, and the copper telephone wire at the user premise.

19. The system of claim 18, wherein the transmission path includes copper telephone wire between the access point at the user premise and a termination of the copper telephone wire within the user premise.

20. The system of claim 18, wherein the transmission path includes a power line.