Wireless-wireline physically converged architectures
Embodiments of the present invention provide systems, devices and methods for improving the performance and range of wireless communication systems. In various embodiments, a wireless and wireline architecture is implemented to allow a channel to more efficiently span physical barriers within the channel. The wireline portion of the channel may leverage pre-existing copper deployed within a building by interfacing copper with north and south transceiver nodes that allow the signal to propagate through a physical structure on the wire itself resulting in significantly less signal degradation compared to the signal having to traverse the physical structure wirelessly.
1. An access node comprising:
a first wireline interface that receives a first wireline signal from a first wireline link coupled to a cellular base station;
a demodulator coupled to the first wireline interface, the demodulator generates an analytic signal from the first wireline signal by sampling the first wireline signal at a first sampling rate;
an interpolator coupled to receive the analytic signal, the interpolator generates an interpolated signal by interpolating the analytic signal at a second sampling rate, the second sampling rate being different from the first sampling rate;
a frequency-scaling buffer coupled to receive the interpolated signal, the frequency-scaling buffer stores a plurality of sampled symbols within the interpolated signal and subsequently prepares the stored plurality of sampled symbols for use in wireline communication;
a digital-to-analog converter that converts the digital signal into an analog signal; and
a second wireline interface that transmits the analog signal on a second wireline link.
2. The access node of claim 1 wherein the access node transmits in a downlink direction during a first period of time and transmits in an uplink direction during a second period of time.
3. The access node of claim 1 wherein the access node operates in one of a plurality of modes.
4. The access node of claim 3 wherein the access node operates in a fast-buffer mode, among the plurality of modes, by changing directions at each symbol.
5. The access node of claim 3 wherein the access node operates in a Long-Term Evolution (LTE)-latency mode, among the plurality of modes, by adding a delay slot to the plurality of slots to increase cyclic-prefix length on the wireline link.
6. The access node of claim 1 wherein the first wireline signal is received from a cellular base station that supports 5G communication.
7. The access node of claim 6 wherein the first wireline signal is a frequency division multiplexed signal.
8. The access node of claim 1 wherein the first wireline link comprises an optical cable.
9. The access node of claim 1 wherein the first wireline link comprises a coaxial cable.
10. A method for communicating a wireline-to-wireline-to-wireless signal at a cellular base station, the method comprising:
receiving a first wireline signal from the cellular base station;
demodulating the first wireline signal to an analytic signal by sampling the first signal at a first sampling rate;
generating an interpolated signal by interpolating the analytic signal at a second rate, the second rate being different than the first rate;
sampling the interpolated signal to generate a plurality of sampled symbols;
converting the plurality of sampled symbols into a first analog signal;
transmitting the first analog signal onto a second wireline link;
receiving the first analog signal from the second wireline link;
converting the first analog signal to a digital signal;
generating a plurality of symbols from the digital signal;
converting the plurality of symbols to a second analog signal; and
transmitting the second analog signal on a wireless link by modulating the second analog signal on a selected carrier signal.
11. The method of claim 10 wherein sampling of the interpolated signal is performed using a fast-buffer mode.
12. The method of claim 10 wherein the sampling of the interpolated signal is performed using a Long-Term Evolution (LTE) latency mode.
13. The method of claim 10 wherein the sampling step uses a buffer to convert the interpolated signal into a time-duplexed signal.
14. The method of claim 10 wherein the cellular base station supports 5G communication.
15. The method of claim 14 wherein the first wireline signal is a frequency division multiplexed signal.
16. The method of claim 10 wherein the second wireline link comprises at least one of a twisted pair, an optical fiber, a powerline connection, an Ethernet connection and a coaxial cable.
17. The method of claim 10 wherein the first wireline link comprises at least one of an optical fiber connection, a coaxial cable and a twisted pair.
18. A wireline-to-wireless access node comprising:
a wireline interface that receives a first wireline signal that was generated from a second wireline signal transmitted from a cellular base station;
an analog-to-digital converter coupled to the wireline interface, the analog-to-digital converter converts the first wireline signal to a digital signal;
a buffer coupled to receive the digital signal, the buffer stores a plurality of symbols within the digital signal and subsequently outputs samples at a first rate;
a digital-to-analog converter coupled to receive the outputted samples, the digital-to-analog converter converts the samples to an analog signal; and
a wireless interface coupled to receive the analog signal, the wireless interface modulates the analog signal to a selected channel carrier frequency and transmits the modulated analog signal on a wireless link.
19. The wireline-to-wireless access node of claim 18 wherein the wireless link is a 5G cellular link.
20. The wireline-to-wireless access node of claim 18 wherein the plurality of symbols are gated into the buffer by a Long-Term Evolution (LTE) 2-kHz slot clock.
21. The wireline-to-wireless access node of claim 18 wherein the wireline-to-wireless access node operates in a fast-buffer mode or a Long-Term Evolution (LTE) latency mode, among the plurality of modes.