ADSL system with improved data rate
View Patent ↗An improved ADSL system with improved data rate is disclosed. In one embodiment, the upstream data bit rate is increased by extending the upstream transmission band. In another embodiment, the downstream data is also increased by extending the downstream transmission band.
1. An ADSL system comprising:
an ADSL transceiver operable to transmit and receive over a frequency spectrum,
the frequency spectrum having a data transmission band from frequency F U0 to frequency F DE , the data transmission band including a first section from frequency F U0 to frequency F UE for transmitting upstream data and a second section from frequency F D0 frequency F DE for transmitting downstream data, the first section having a first subsection from frequency F U0 to frequency F U1 and comprising a channels and a second subsection from frequency F U1 to frequency F UE , wherein F U0 <F U1 <F UE ≦F D0 <F DE ;
wherein the data transmission band has improved data transmission rates for both upstream data transmission and downstream data transmission,
the data transmission in the first subsection has a first power,
the data transmission in the second subsection has a second power lower than the first power, and
the data transmission in the second section has a third power lower than the second power.
2. The ADSL system of claim 1 wherein the second section has a third subsection from frequency F D0 to frequency F D1 and a fourth subsection from frequency F D1 to frequency F DE , the fourth subsection comprising channels, thereby increasing downstream data transmission rate, and
the second subsection comprises x channels, where x≧1, thereby increasing upstream data transmission rate.
3. The ADSL system of claim 2 wherein F D1 is equal to about the end of the data transmission band for conventional ADSL systems, and y is>1.
4. The ADSL system of claim 1 wherein F U0 is from the end of the POTS spectrum or the ISDN spectrum.
5. The ADSL system of claim 4 wherein F U1 and the second subsection are contiguous.
6. The ADSL system of claim 1 further comprising an echo cancellation mode for downstream data transmission.
7. The ADSL system of claim 6 wherein the echo cancellation mode for downstream data transmission comprises transmitting downstream data in the first and second sections.
8. The ADSL system of claim 1 further comprising a partial echo cancellation mode for downstream data transmission.
9. The ADSL system of claim 8 wherein the partial echo cancellation mode for downstream data transmission comprises transmitting downstream data in the second subsection of the first section and the second section.
10. A method for transmitting and receiving data within a frequency band in an ADSL system, the method comprising:
transmitting data in an upstream direction using a first frequency section within the frequency band having first and second subsections, wherein the first subsection has an upper frequency equal to about the upper frequency of conventional ADSL systems and the second subsection beginning at a frequency greater than about the upper frequency of the first subsection; and
transmitting data in a downstream direction using a second frequency section; wherein
the data transmission in the first subsection has a first power,
the data transmission in the second subsection has a second power lower than the first power, and
the data transmission in the second frequency section has a third power lower than the second power.
11. The method as claimed in claim 10 , wherein the first frequency section is between frequency F U0 and frequency F UE , the first subsection is from frequency F U0 to frequency F U1 comprising a channels; and the second subsection is from frequency F U1 to frequency F UE .
12. The method as claimed in claim 11 , wherein transmitting in the downstream direction is between frequency F D0 and frequency F DE , wherein F U0 <F U1 <F UE ≦F D0 <F DE .
13. The method as claimed in claim 11 , wherein the second frequency section has a third subsection from frequency F D0 to frequency F D1 and a fourth subsection from frequency F D1 to frequency F DE , the fourth subsection comprising y channels, thereby increasing downstream data transmission rate.
14. The method as claimed in claim 11 , wherein the second subsection comprises x channels, where x ≧1, thereby increasing upstream data transmission rate.
15. The method as claimed in claim 10 , wherein the frequency band has improved data transmission rates for both upstream data transmission and downstream data transmission.