Point-to-multi-point transmission over a wired loop plant
The access node includes first transmit/receive circuitry with digital signal processing logic and digital-to-analog/analog-to-digital conversion logic, and second transmit/receive circuitry with transmit/receive amplifiers and line adaptation units for connection to a transmission line. The access node further includes an analog switch for dynamically connecting one of the first transmit/receive circuitry with one of the second transmit/receive circuitry according to a transmit/receive cross-connect table, and transmit/receive control logic for updating the transmit cross-connect table according to a transmit/receive traffic pattern over the respective transmission lines.
1. An access node for connecting subscribers via a wired loop plant, the access node comprising:
a first transmit circuitry including transmit digital processing logic configured to output transmit digital samples serially coupled with digital-to-analog conversion logic configured to convert the transmit digital samples into an analog transmit signal serially coupled with a first transmit output port,
a plurality of second transmit circuitries individually including a second transmit input port serially coupled with a transmit amplifier configured to amplify a transmit signal serially coupled with a line adaptation unit configured to connect to a transmission line of the wired loop plant and configured to adapt to line physical characteristics of the transmission line,
wherein the access node further includes a transmit analog switch including a third transmit input port coupled to the first transmit output port, and third transmit output ports coupled to respective ones of the second transmit input ports, and configured to dynamically connect the third transmit input port to one of the third transmit output ports according to a transmit cross-connect table, and
wherein the access node further includes transmit control logic coupled to the transmit analog switch and configured to update the transmit cross-connect table according to a transmit traffic pattern over the respective transmission lines.
2. The access node according to claim 1 , wherein the transmit traffic pattern conforms to a Time-Division Multiple Access (TDMA) scheme.
3. The access node according to claim 1 , wherein the transmit traffic pattern is determined according to transmit traffic demands over the respective transmission lines.
4. The access node according to claim 1 , wherein the transmit control logic is further configured to individually disable or enable the transmit amplifiers concomitantly with the updating of the transmit cross-connect table.
5. The access node according to claim 1 , wherein the first transmit circuitry includes a transmit filter serially coupled between the digital-to-analog conversion logic and the first output port, the transmit filter being configured to confine transmit signal energy into a transmit frequency band.
6. An access node for connecting subscribers via a wired loop plant, the access node comprising:
a first receive circuitry including a first receive input port serially coupled with analog-to-digital conversion logic configured to convert a receive analog signal into receive digital samples serially coupled with receive digital processing logic configured to process the receive digital samples,
a plurality of second receive circuitries individually including a line adaptation unit configured to connect to a transmission line of the wired loop plant and configured to adapt to line physical characteristics of the transmission line serially coupled with a receive amplifier configured to amplify a receive signal serially coupled with a second receive output port,
wherein the access node further includes a receive analog switch including third receive input ports coupled to respective ones of the second receive output ports, and a third receive output port coupled to the first receive input port, and configured to dynamically connect one of the third receive input ports to the third receive output port according to a receive cross-connect table, and
wherein the access node further includes receive control logic coupled to the receive analog switch and configured to update the receive cross-connect table according to a receive traffic pattern over the respective transmission lines.
7. The access node according to claim 6 , wherein the receive traffic pattern conforms to a Time-Division Multiple Access (TDMA) scheme.
8. The access node according to claim 6 , wherein the receive traffic pattern is determined according to receive traffic demands over the respective transmission lines.
9. The access node according to claim 6 , wherein the receive control logic is further configured to individually disable or enable the receive amplifiers concomitantly with the updating of the receive cross-connect table.
10. The access node according to claim 6 , where in the first receive circuitry includes a receive filter serially coupled between the first receive input port and the analog-to-digital conversion logic, the receive filter being configured to confine receive signal energy into a receive frequency band.
11. The access node according to claim 1 , wherein the transmit cross-connect table of the transmit analog switch is updated independently from a receive cross-connect table.