Rapid power up of Power Over Ethernet equipment system
A Power Over Ethernet (PoE) system includes Power Sourcing Equipment (PSE) providing data and voltage over Ethernet wires to a Powered Device (PD). Instead of the conventional detection and classification routine being performed every time the system is powered up, the pertinent data to determine whether to apply PoE to the PD is stored in a memory in the PSE. The memory is accessed by a controller in the PSE when the PSE is powered up. Therefore, a time-consuming detection and classification routine does not have to be performed each time the system is powered up. The system is particularly useful in automobiles where the particular PDs and PSEs are predetermined. The PoE data may be obtained the first time the system is powered up or may be stored in the memory when the PSE is designed or fabricated.
1. A system comprising:
Power Sourcing Equipment (PSE) providing combined data and voltage over wires, the PSE having a voltage source for generating a voltage for transmission on the wires after powering up of the PSE; and
a Powered Device (PD) connected to the PSE by at least the wires to receive the data and voltage,
wherein the PSE contains a memory that stores information identifying that the PD is able to receive the voltage over the wires for powering the PD,
wherein the PSE contains a controller,
wherein, when the PSE is powered up, the controller is configured to access the information stored in the memory and, based on the information, control the PSE to supply the voltage to the wires to power the PD,
wherein the system is a Power Over Ethernet system, and wherein the controller is configured to perform an abbreviated PoE detection and classification routine, detecting a power requirement of the PD, each time the PSE is powered up.
2. A system comprising:
Power Sourcing Equipment (PSE) providing combined data and voltage over wires, the PSE having a voltage source for generating a voltage for transmission on the wires after powering up of the PSE; and
a Powered Device (PD) connected to the PSE by at least the wires to receive the data and voltage,
wherein the PSE contains a memory that stores information identifying that the PD is able to receive the voltage over the wires for powering the PD,
wherein the PSE contains a controller,
wherein, when the PSE is powered up, the controller is configured to access the information stored in the memory and, based on the information, control the PSE to supply the voltage to the wires to power the PD,
wherein the system is a Power Over Ethernet system, the wires are Ethernet wires, and wherein the controller is configured to not perform a PoE detection and classification routine, detecting a power requirement of the PD, each time the PSE is powered up.
3. A system comprising:
Power Sourcing Equipment (PSE) providing combined data and voltage over wires, the PSE having a voltage source for generating a voltage for transmission on the wires after powering up of the PSE; and
a Powered Device (PD) connected to the PSE by at least the wires to receive the data and voltage,
wherein the PSE contains a memory that stores information identifying that the PD is able to receive the voltage over the wires for powering the PD,
wherein the PSE contains a controller,
wherein, when the PSE is powered up, the controller is configured to access the information stored in the memory and, based on the information, control the PSE to supply the voltage to the wires to power the PD, and
wherein the information stored in the memory comprises information obtained by a detection and classification routine, detecting a power requirement of the PD, performed prior to the powering up of the PSE.
4. A system comprising:
Power Sourcing Equipment (PSE) providing combined data and voltage over wires, the PSE having a voltage source for generating a voltage for transmission on the wires after powering up of the PSE; and
a Powered Device (PD) connected to the PSE by at least the wires to receive the data and voltage,
wherein the PSE contains a memory that stores information identifying that the PD is able to receive the voltage over the wires for powering the PD,
wherein the PSE contains a controller,
wherein, when the PSE is powered up, the controller is configured to access the information stored in the memory and, based on the information, control the PSE to supply the voltage to the wires to power the PD, and
wherein the information is stored in the memory prior to a first use of the PSE in the system.
5. A system comprising:
Power Sourcing Equipment (PSE) providing combined data and voltage over wires, the PSE having a voltage source for generating a voltage for transmission on the wires after powering up of the PSE; and
a Powered Device (PD) connected to the PSE by at least the wires to receive the data and voltage,
wherein the PSE contains a memory that stores information identifying that the PD is able to receive the voltage over the wires for powering the PD,
wherein the PSE contains a controller,
wherein, when the PSE is powered up, the controller is configured to access the information stored in the memory and, based on the information, control the PSE to supply the voltage to the wires to power the PD, and
wherein the information in the memory comprises data transmitted by the PD to the PSE prior to the powering up of the PSE.
6. A system comprising:
Power Sourcing Equipment (PSE) providing combined data and voltage over wires, the PSE having a voltage source for generating a voltage for transmission on the wires after powering up of the PSE; and
a Powered Device (PD) connected to the PSE by at least the wires to receive the data and voltage,
wherein the PSE contains a memory that stores information identifying that the PD is able to receive the voltage over the wires for powering the PD,
wherein the PSE contains a controller,
wherein, when the PSE is powered up, the controller is configured to access the information stored in the memory and, based on the information, control the PSE to supply the voltage to the wires to power the PD,
wherein the information in the memory comprises data transmitted by the PD to the PSE prior to the powering up of the PSE, and
wherein the data is transmitted as part of a Link Level Discovery Protocol (LLDP).
7. A method performed by a system comprising:
applying power to Power Sourcing Equipment (PSE) for providing combined data and voltage over wires to a Powered Device (PD) connected to the PSE by at least the wires, the PSE having a voltage source for generating a voltage for transmission on the wires after powering up of the PSE; and
accessing a memory in the PSE that stores information identifying that the PD is able to receive the voltage over the wires for powering the PD,
wherein accessing the memory comprises accessing the memory by a controller when powering up the PSE and, based on the information, controlling the PSE by the controller to supply the voltage to the wires to power the PD,
wherein the system is a Power Over Ethernet system, and wherein the controller performs an abbreviated PoE detection and classification routine, detecting a power requirement of the PD, each time the PSE is powered up.
8. The method of claim 7 further comprising storing the information in the memory based on data transmitted by the PD to the PSE subsequent to the powering up of the PSE.
9. The method of claim 7 further comprising periodically updating the information in the memory.
10. A method performed by a system comprising:
applying power to Power Sourcing Equipment (PSE) for providing combined data and voltage over wires to a Powered Device (PD) connected to the PSE by at least the wires, the PSE having a voltage source for generating a voltage for transmission on the wires after powering up of the PSE; and
accessing a memory in the PSE that stores information identifying that the PD is able to receive the voltage over the wires for powering the PD,
wherein accessing the memory comprises accessing the memory by a controller when powering up the PSE and, based on the information, controlling the PSE by the controller to supply the voltage to the wires to power the PD,
wherein the system is a Power Over Ethernet system, the wires are Ethernet wires, and wherein the controller does not perform a PoE detection and classification routine, detecting a power requirement of the PD, each time the PSE is powered up.
11. A method performed by a system comprising:
applying power to Power Sourcing Equipment (PSE) for providing combined data and voltage over wires to a Powered Device (PD) connected to the PSE by at least the wires, the PSE having a voltage source for generating a voltage for transmission on the wires after powering up of the PSE;
accessing a memory in the PSE that stores information identifying that the PD is able to receive the voltage over the wires for powering the PD;
based on the information, controlling the PSE to supply the voltage to the wires to power the PD; and
storing the information in the memory by a detection and classification routine, detecting a power requirement of the PD, performed prior to the powering up of the PSE.
12. A method performed by a system comprising:
applying power to Power Sourcing Equipment (PSE) for providing combined data and voltage over wires to a Powered Device (PD) connected to the PSE by at least the wires, the PSE having a voltage source for generating a voltage for transmission on the wires after powering up of the PSE;
accessing a memory in the PSE that stores information identifying that the PD is able to receive the voltage over the wires for powering the PD;
based on the information, controlling the PSE to supply the voltage to the wires to power the PD; and
storing the information in the memory prior to a first use of the PSE in the system.
13. A method performed by a system comprising:
applying power to Power Sourcing Equipment (PSE) for providing combined data and voltage over wires to a Powered Device (PD) connected to the PSE by at least the wires, the PSE having a voltage source for generating a voltage for transmission on the wires after powering up of the PSE;
accessing a memory in the PSE that stores information identifying that the PD is able to receive the voltage over the wires for powering the PD;
based on the information, controlling the PSE to supply the voltage to the wires to power the PD; and
storing the information in the memory based on data transmitted by the PD to the PSE prior to the powering up of the PSE.
14. A method performed by a system comprising:
applying power to Power Sourcing Equipment (PSE) for providing combined data and voltage over wires to a Powered Device (PD) connected to the PSE by at least the wires, the PSE having a voltage source for generating a voltage for transmission on the wires after powering up of the PSE;
accessing a memory in the PSE that stores information identifying that the PD is able to receive the voltage over the wires for powering the PD;
based on the information, controlling the PSE to supply the voltage to the wires to power the PD; and
storing the information in the memory based on data transmitted by the PD to the PSE, wherein the data is transmitted as part of a Link Level Discovery Protocol (LLDP).
15. A method performed by a system comprising:
applying power to Power Sourcing Equipment (PSE) for providing combined data and voltage over wires to a Powered Device (PD) connected to the PSE by at least the wires, the PSE having a voltage source for generating a voltage for transmission on the wires after powering up of the PSE;
accessing a memory in the PSE that stores information identifying that the PD is able to receive the voltage over the wires for powering the PD; and,
based on the information, controlling the PSE to supply the voltage to the wires to power the PD,
wherein the system is in an automobile and where the powering up of the PSE occurs as a result of the automobile's ignition switch being turned on.
16. A method performed by a system comprising:
applying power to Power Sourcing Equipment (PSE) for providing combined data and voltage over wires to a Powered Device (PD) connected to the PSE by at least the wires, the PSE having a voltage source for generating a voltage for transmission on the wires after powering up of the PSE;
accessing a memory in the PSE that stores information identifying that the PD is able to receive the voltage over the wires for powering the PD; and
based on the information, controlling the PSE to supply the voltage to the wires to power the PD,
wherein the information in the memory is updated when it is discovered that the PD has been connected into the system subsequent to a previous powering up of the PSE.