2.5 GBPS/5GBPS ethernet communications over a full duplex communication channel

1. A method of transferring data between a first and second transceiver over a wired bi-directional communications channel, the method comprises:

measuring a quality level of the wired bi-directional communications channel; selecting a maximum possible data transmission rate over the wired bi-directional communications channel for the measured quality level;

when the maximum possible data transmission rate for a measured quality level is a reduced data transmission rate less than a maximum data transmission rate, proportionally adjusting clock rates of circuit elements of the first and second transceiver to transfer the data at the reduced data transmission rate to mitigate intersymbol interference (ISI) of the wired bi-directional communications channel; and

wherein the proportionally adjusting clocks comprises adjustment based on:

adjusted clock rate=(( R )/( M ))*(MCF), where:

R=reduced data transmission rate;

M=maximum data transmission rate; and

MCF=maximum data transmission rate clock frequency.

2. The method of claim 1 , wherein the first and second transceivers are 10 Gbps transceivers and the data transmission rate includes at least one of 2.5 Gbps or 5 Gbps.

3. The method of claim 2 , wherein, for 5 Gbps data transmission rates, the proportionally adjusting clocks comprises adjusting the first and second transceiver's transmit DAC clock to 400 MHz and receive ADC clock to 400 MHz.

4. The method of claim 2 , wherein, for 2.5 Gbps data transmission rates, the proportionally adjusting clocks comprises adjusting a transmit DAC clock to 200 MHz and receive ADC clock to 200 MHz.

5. The method of claim 1 , wherein the wired bi-directional communications channel comprises Cat5 or Cat5e cabling.

6. The method of claim 5 , wherein the Cat5 or Cat5e cabling transfers data using an 802.11ac communication standard.

7. The method of claim 1 further comprising dividing data frames of the data to be transmitted N times, where N=number of layers of at least a portion of identical transceiver processing circuitry, and wherein an output of each of the N layers of the portion of identical transceiver circuitry is connected respectively to a twisted wiring pair of the wired bi-directional communications channel.

8. A method of transferring data between a router and a wireless access point (WAP) over a wired bi-directional communications channel within category 5 (Cat5) cabling, the method comprising:

measuring a quality level of the wired bi-directional communications channel;

selecting a maximum possible data transmission rate over the wired bi-directional communications channel for the measured quality level;

when the maximum possible data transmission rate for a measured quality level is a reduced data transmission rate less than a maximum data transmission rate of transceivers operative with the router and WAP, proportionally adjusting clocks of circuit elements of the transceivers to transfer the data at the reduced data transmission rate to mitigate intersymbol interference (ISI) of the wired bi-directional communications channel; and

wherein the proportionally adjusting clocks comprises adjustment based on:

adjusted clock rate=(( R )/( M ))*(MCF), where:

R=reduced data transmission rate;

M=maximum data transmission rate; and

MCF=maximum data transmission rate clock frequency.

9. The method of claim 8 further comprising dividing data frames of the data to be transferred N times, where N=number of layers of at least a portion of identical transceiver processing circuitry, and wherein an output of each of the N layers of the portion of identical transceiver circuitry is connected respectively to a twisted wiring pair of the category 5 (Cat5) cabling.

10. The method of claim 9 further comprising for the data to be transferred, prior to dividing the data frames:

receiving the data to be transferred at a 10 Gbps rate:

repeating the data to be transferred (R/M) times;

stuffing the data to be transferred with idles to increase speed; and

interfacing at 2.5 Gbps/5 Gbps.

11. A transceiver architecture, the transceiver architecture comprising:

an interface receiving data frames at a first data transmission rate;

a first-in, first-out (FIFO) buffer to buffer the data frames as received from the interface;

a physical coding sub-layer (PCS) block receiving the data frames from the FIFO and outputting a plurality of parallel data sub-frames at a reduced data transmission rate;

a multi-layer transmission circuit, wherein each of the plurality of parallel data sub-frames is input to a respective layer of the multi-layer transmission circuit, each layer of the multi-layer transmission circuit layer processing the data sub-frames at the reduced data transmission rate with a proportionally reduced clock rate to mitigate intersymbol interference (ISI) of a coupled twisted pair transmission medium; and wherein the proportionally reduced clock rate is adjusted as per:

adjusted clock rate=(( R )/( M ))*(MCF), where:

R=reduced data transmission rate;

M=maximum data transmission rate; and

MCF=maximum data transmission rate clock frequency; and

an output interface connecting each of the processed data sub-frames to the twisted pair transmission medium.

12. The transceiver architecture of claim 11 , wherein the physical coding sub-layer (PCS) block includes:

a PCS TX (transmitter);

a PCS RX (receiver); and

forward error correction (FEC).

13. The transceiver architecture of claim 12 , wherein the PCS TX comprises:

a 64/65 bit converter;

an alignment shift register coupled to an output of the 64/65 bit converter;

a data scrambler coupled to an output of the alignment shift register;

a Low-Density parity-check coder (LDPC) coupled to the data scrambler;

a cyclic redundancy check (CRC) coupled to the data scrambler;

a delay line coupled to the data scrambler;

one auxiliary bit input; and

a multiplexer to multiplex outputs from the LDPC, CRC, delay line and auxiliary bit input.

14. The transceiver architecture of claim 12 , wherein the PCS RX comprises:

a stripper to strip CRC bits and an auxiliary bit;

a descrambler to descramble data bits;

a 65/64 data line transcoder; and

a first-in, first-out (FIFO) buffer.

15. The transceiver architecture of claim 11 , wherein a transmit path of the multi-layer transmission circuit layer comprises:

a symbol mapper converting the data sub-frames to a plurality of output symbols;

a pre-equalizer, coupled to an output of the symbol mapper, mitigating intersymbol interference (ISI) of a communications channel;

a digital transmission TX filter coupled to an output of the pre-equalizer;

a digital to analog converter (DAC) coupled to an output of the digital TX filter; and transformers to connect analog data signals output from the DAC to the twisted pair transmission medium.

16. The transceiver architecture of claim 11 wherein a receive path of the multi-layer transmission circuit layer comprises:

transformers to connect analog data signals received from the twisted pair transmission medium;

a programmable gain amplifier (PGA) amplifying the received analog data signals;

an analog to digital converter (ADC) converting the amplified analog signals to digitized sampled signals;

a digital automatic gain control (DAGC) digitally controlling gain of the digitized sampled signals;

an adaptive digital processing block to reduce cross talk between twisted pairs within the twisted pair transmission medium; and

slicers coupled to the adaptive digitally processed signals to provide synchronization of a receiver signal to a transmitter.

17. The transceiver architecture of claim 11 , wherein the interface comprises a MAC interface:

receiving data at 10 Gbps rate:

repeating MAC data (R/M) times;

stuffing MAC data with idles to increase speed; and

interfacing at 2.5 Gbps/5 Gbps.