Transmission of pulse power and data in a communications network
In one embodiment, a method includes transmitting pulse power on two wire pairs, the pulse power comprising a plurality of high voltage pulses with the high voltage pulses on the wire pairs offset between the wire pairs to provide continuous power, performing low voltage fault detection on each of the wire pairs between the high voltage pulses, and transmitting data on at least one of the wire pairs during transmittal of the high voltage pulses. Data transmittal is suspended during the low voltage fault detection.
1. A method comprising:
transmitting pulse power on two wire pairs, the pulse power comprising a plurality of power pulses with the power pulses on the wire pairs being offset between the wire pairs to provide continuous power;
performing fault detection on each of the wire pairs between the power pulses; and
transmitting data on at least one of the wire pairs during transmittal of the power pulses;
wherein data transmittal is suspended during said fault detection.
2. The method of claim 1 , wherein a phase of pulse power is carried on each of the wire pairs and the wire pairs are located in a multi-pair cable.
3. The method of claim 1 , wherein a voltage of the power pulses comprises at least 60 volts.
4. The method of claim 1 , wherein one period of a power pulse and the fault detection is less than or equal to 12 ms.
5. The method of claim 1 , wherein suspension of the data transmittal comprises controlling a MAC (Media Access Control)/PHY (Physical layer entity) to suspend the data transmittal.
6. The method of claim 1 , wherein the power pulses comprise alternating on-time duration and off-time duration, including a high-state within the on-time duration and a low-state within the off-time duration, the method further comprising:
identifying a transition from the low-state to the high-state in the power pulses;
superimposing a modulated data signal within the on-time duration, after a first delay of the transition from the low-state to the high-state to produce a superimposed sequence of pulses; and
transmitting the superimposed sequence of pulses.
7. The method of claim 6 , further comprising:
identifying a transition from the high-state to the low-state in the power pulses; and
superimposing the modulated data signal within the off-time duration, after a second delay of the transition from the high-state to the low-state.
8. The method of claim 6 , wherein the modulated data signal is synchronized between a transmitter and a receiver based on the transition.
9. The method of claim 6 , wherein the modulated data signal comprises a sinusoidal signal created based on a phase shift modulation scheme.
10. The method of claim 6 , wherein the modulated data signal comprises a pulse signal, the pulse signal including a high-state incurring a voltage increase and a low-state incurring a voltage decrease.
11. The method of claim 1 , wherein the pulse power is multiphase pulse power that comprises a plurality of sequences of power pulses, each sequence of power pulses forming a phase of the multiphase pulse power.
12. An apparatus comprising:
a power supply;
a transmitter; and
a controller coupled to the power supply and to the transmitter, wherein the controller controls the transmitter to:
transmit pulse power on two wire pairs, the pulse power comprising a plurality of power pulses with the power pulses on the wire pairs being offset between the wire pairs to provide continuous power and to enable fault detection to be performed on at least one of the wire pairs during transmittal of the power pulses; and
transmit data on at least one of the wire pairs during transmittal of the power pulses, and to suspend data transmittal when fault detection is being performed.
13. The apparatus of claim 12 , wherein a phase of pulse power is carried on each of the wire pairs and the wire pairs are located in a multi-pair cable.
14. The apparatus of claim 12 , wherein a voltage of the power pulses comprises at least 60 volts.
15. The apparatus of claim 12 , wherein the controller causes suspension of the data transmittal comprises controlling a MAC (Media Access Control)/PHY (Physical layer entity) to suspend the data transmittal.
16. The apparatus of claim 12 , wherein the power pulses comprise alternating on-time duration and off-time duration, including a high-state within the on-time duration and a low-state within the off-time duration, and the controller further:
identifies a transition from the low-state to the high-state in the power pulses;
superimposes a modulated data signal within the on-time duration, after a first delay of the transition from the low-state to the high-state to produce a superimposed sequence of pulses; and
causes the transmitter to transmit the superimposed sequence of pulses.
17. The apparatus of claim 16 , wherein the controller further:
identifies a transition from the high-state to the low-state in the power pulses; and
superimposes the modulated data signal within the off-time duration, after a second delay of the transition from the high-state to the low-state.
18. The apparatus of claim 16 , wherein the modulated data signal is synchronized between a transmitter and a receiver based on the transition.
19. The apparatus of claim 16 , wherein the modulated data signal comprises a pulse signal, the pulse signal including a high-state incurring a voltage increase and a low-state incurring a voltage decrease.
20. The apparatus of claim 12 , wherein the pulse power is multiphase pulse power that comprises a plurality of sequences of power pulses, each sequence of power pulses forming a phase of the multiphase pulse power.