Methods, devices, and systems for timing and bandwidth management of ultra-wideband, wireless communication channels
Disclosed herein are methods, devices, and systems for providing timing and bandwidth management of ultra-wideband, wireless data channels (including radio frequency and wireless optical data channels). According to one embodiment, a hub apparatus is disclosed for providing out-of-band bandwidth management for a free-space-optical (FSO) data channel associated with a first device. The hub apparatus includes a processor, a memory coupled with the processor, an FSO transmitter coupled with the processor, and an FSO receiver coupled with the processor. The FSO transmitter may be configured to transmit a control signal comprising timing information and bandwidth management information.
1. A first free-space-optical (FSO) device for providing out-of-band management for a first FSO data channel associated with a second FSO device, the first FSO device comprising:
a processor;
a memory coupled with the processor;
a first device first FSO transmitter coupled with the processor; and
a first device first FSO receiver coupled with the processor, wherein:
the second FSO device comprises a second device first FSO transmitter and a second device first FSO receiver;
the first device first FSO transmitter is configured for transmitting a control signal to the second device first FSO receiver;
the first device first FSO receiver is configured for receiving a response signal from the second device first FSO transmitter; and
the processor is configured for:
determining a first time interval based on the control signal, the response signal, and a detected multipath reflection, wherein the detected multipath reflection is detected by at least one of:
the first device first FSO receiver upon receiving the response signal; and
the second device first FSO receiver upon receiving the control signal;
modifying transmission parameters associated with the first FSO data channel based on the first time interval;
and
the control signal and the response signal are distinct from the first FSO data channel.
2. The first FSO device of claim 1 , wherein:
the control signal comprises timing information and bandwidth management information; and
the processor is further configured for modifying the timing information and the bandwidth management information based on the first time interval.
3. The first FSO device of claim 2 , wherein the control signal further comprises a plurality of optical pulses and each optical pulse provides a portion of the timing information and a portion of the bandwidth management information.
4. The first FSO device of claim 3 , wherein:
at least one of a rising edge and a falling edge of each optical pulse provides the portion of the timing information; and
the portion of the bandwidth management information is a data symbol.
5. The first FSO device of claim 1 , wherein the first FSO data channel is a bidirectional data channel.
6. The first FSO device of claim 1 , wherein:
the first FSO device is an FSO hub device; and
the first FSO device is further configured for providing out-of-band management for a second FSO data channel associated with a third FSO device.
7. The first FSO device of claim 6 , wherein:
the first FSO data channel is a bidirectional data channel; and
the second FSO data channel is a bidirectional data channel.
8. The first FSO device of claim 1 , wherein:
the first FSO data channel is a bidirectional data channel; and
the first FSO device further comprises
a first device second FSO transmitter coupled with the processor; and
a first device second FSO receiver coupled with the processor, wherein:
the first device second FSO transmitter is configured for transmitting over the first FSO data channel to the second FSO device; and
the first device second FSO receiver is configured for receiving over the first FSO data channel from the second FSO device.
9. The first FSO device of claim 8 , wherein:
the first device first FSO transmitter is configured to transmit using a first wavelength;
the first device second FSO transmitter is configured to transmit using a second wavelength; and
the first wavelength and the second wavelength are distinct wavelengths.
10. The first FSO device of claim 8 , wherein:
the second FSO device comprises:
a second device second FSO receiver configured for receiving over the first FSO data channel from the first FSO device; and
a second device second FSO transmitter configured for transmitting over the first FSO data channel to the first FSO device.
11. The first FSO device of claim 10 , wherein:
the second device first FSO transmitter is configured to transmit using a first wavelength;
the second device second FSO transmitter is configured to transmit using a second wavelength; and
the first wavelength and the second wavelength are distinct wavelengths.
12. The first FSO device of claim 10 , wherein:
the first device second FSO transmitter is configured to transmit using a first wavelength;
the second device second FSO transmitter is configured to transmit using a second wavelength; and
the first wavelength is approximately equal to the second wavelength.
13. The first FSO device of claim 1 , wherein modifying transmission parameters associated with the first FSO data channel includes modifying an equalization associated with the first FSO data channel.
14. The first FSO device of claim 13 , wherein modifying the equalization associated with the first FSO data channel includes modifying a pre-emphasis associated with the first FSO data channel.
15. The first FSO device of claim 13 , wherein modifying the equalization associated with the first FSO data channel includes modifying a post-emphasis associated with the first FSO data channel.
16. A method implemented on a first free-space-optical (FSO) device for providing out-of-band management for a first FSO data channel associated with a second FSO device, the first FSO device comprising a processor, a memory coupled with the processor, a first device first FSO transmitter coupled with the processor; and a first device first FSO receiver coupled with the processor; the method comprising:
transmitting a control signal to a second device first FSO receiver of the second FSO device via the first device first FSO transmitter;
receiving a response signal from a second device first FSO transmitter of the second FSO device via the first device first FSO receiver;
determining a first time interval based on the control signal, the response signal, and a detected multipath reflection, wherein the detected multipath reflection is detected by at least one of:
the first device first FSO receiver upon receiving the response signal; and
the second device first FSO receiver upon receiving the control signal;
and
modifying transmission parameters associated with the first FSO data channel based on the first time interval, wherein the control signal and the response signal are distinct from the first FSO data channel.