Power supply control apparatus and power supply control method

• US 20060057967A1
• Filed: 09/15/2005
• Published: 03/16/2006
• Est. Priority Date: 09/16/2004
• Status: Abandoned Application

• Current Assignee: NEC Infrontia Corporation (NEC Corporation)
• Original Assignee: NEC Corporation
• Inventors: Shimada, Keita
• Application Number:
  US11/226,220
• Publication Number:
  US 20060057967A1
• Time in Patent Office: Days
• US Class Current: 455/67.130
• CPC Class Codes: G06F 1/3203 Power management, i.e. event-based initiation of a power-saving mode
• CPC Class Codes: G06F 1/3246 by software initiated power-off
• CPC Class Codes: H04L 12/10 Current supply arrangements

Abstract

A port power supplying control section instructs a power supply interface section to start power supply from a port to which a power receiving apparatus successfully detected by power receiving apparatus detection processing is connected. For each port, power supply from which is started, a power supply possible/impossible judgment section sequentially obtains the corresponding non-power-supply time zone from a table stored in a scheduling section, sequentially receives time data from a control section, and compares these. In the case that the time data is inside the range of the obtained non-power-supply time zone, the port power supplying control section is instructed to stop power supply from the corresponding port. In the case that the time data is outside the range of the non-power-supply time zone, a power receiving apparatus detection processing section is instructed to perform power receiving apparatus detection processing so that power supply from the corresponding port is resumed.

Claims

1. A power supply control apparatus comprising:

one or a plurality of connectors, each provided with a plurality of connection terminals and part or all of the connection terminals being power supply terminals for supplying power to communication apparatuses to be connected,

a time zone data storage section for storing time zone data indicating time zones during which the power supply terminals corresponding to the one or plurality of connectors should stop power supply,

a clock for sequentially outputting time data, and

a power supply control section for comparing the time data with the time zone data stored in the time zone data storage section and for turning ON/OFF power supply depending on the result of the comparison, for respective power supply terminals of the connector.

2. A power supply control apparatus comprising:

one or a plurality of connectors, each provided with a plurality of connection terminals and part or all of the connection terminals being power supply terminals for supplying power to communication apparatuses to be connected,

a power supply possible/impossible table for registering the possibility/impossibility of power supply in correspondence with the one or plurality of connectors,

a connection confirmation signal application section for applying a signal, for confirming the connection of a communication apparatus to which power is to be supplied, to the respective power supply terminals of each connector registered to be “

power supply impossible”

in the power supply possible/impossible table,

a power supply ON/OFF judgment section for sequentially judging whether power supply using each connector registered to be “

power supply possible”

in the power supply possible/impossible table is performed or not,

a first power supply possible/impossible table renewal section for renewing the content indicating that, when it is confirmed by the application of the connection confirmation signal from the connection confirmation signal application section that a communication apparatus to which power is to be supplied is connected, the connection of the communication apparatus to the corresponding connector registered in the power supply possible/impossible table is present,

a second power supply possible/impossible table renewal section for renewing the content indicating that, when it is judged by the power supply ON/OFF judgment section that power supply is not performed, power supply is impossible for the corresponding connector registered in the power supply possible/impossible table,

a time zone data storage section for storing time zone data indicating non-power-supply time zones each serving as a time zone during which the power supply terminals should stop power supply to the communication apparatus connected to each connector, in correspondence with respective connectors,

a clock for sequentially outputting time data, and

a power supply control section wherein the time data is compared with the corresponding time zone data stored in the time zone data storage section for each connector registered to be “

power supply possible”

in the power supply possible/impossible table, power supply using the connector is turned ON/OFF according to the result of the comparison, and for each connector registered to be “

power supply impossible”

in the power supply possible/impossible table, power supply using the connector is not performed.

3. A power supply control apparatus according to claim 2, wherein the first power supply possible/impossible table renewal section comprising:

a response content storage section for previously storing a predetermined response content obtained when a communication apparatus to which power is to be supplied is connected to the connector and the connection confirmation signal is output from the connector, and

a connection confirmation section for confirming that a communication apparatus to which power is to be supplied is connected, by comparing the response content obtained in response to the application of the connection confirmation signal from the connection confirmation signal application section with the predetermined response content stored in the response content storage section.

4. A power supply control apparatus according to claim 2, wherein the power supply control section comprises:

a non-power-supply time zone reaching judgment section for judging whether the corresponding non-power-supply time zone is reached, by comparing the corresponding time zone data stored in the time zone data storage section with the time data output from the clock, after it is judged by the power supply ON/OFF judgment section that power supply is performed,

a power supply stop section for stopping power supply using the corresponding connector after the non-power-supply time zone reaching judgment section judges that the non-power-supply time zone is reached,

a non-power-supply time zone end monitoring section for monitoring the end of the corresponding non-power-supply time zone by sequentially comparing the time data output from the clock with the corresponding time zone data stored in the time zone data storage section after power supply is stopped by the power supply stop section, and

a power supply possible/impossible table renewal stop section for not instructing the second power supply possible/impossible table renewal section to renew the corresponding content in the power supply possible/impossible table until the non-power-supply time zone end monitoring section confirms the end of the non-power-supply time zone.

5. A power supply control apparatus according to claim 3, wherein the power supply control section comprises:

a non-power-supply time zone reaching judgment section for judging whether the corresponding non-power-supply time zone is reached, by comparing the corresponding time zone data stored in the time zone data storage section with the time data output from the clock, after it is judged by the power supply ON/OFF judgment section that power supply is performed,

a power supply stop section for stopping power supply using the corresponding connector after the non-power-supply time zone reaching judgment section judges that the non-power-supply time zone is reached,

a non-power-supply time zone end monitoring section for monitoring the end of the corresponding non-power-supply time zone by sequentially comparing the time data output from the clock with the corresponding time zone data stored in the time zone data storage section after power supply is stopped by the power supply stop section, and

a power supply possible/impossible table renewal stop section for not instructing the second power supply possible/impossible table renewal section to renew the corresponding content in the power supply possible/impossible table until the non-power-supply time zone end monitoring section confirms the end of the non-power-supply time zone.

6. A power supply control apparatus according to claim 4, further comprising:

a power threshold value storage section for storing, in correspondence with each connector, a power threshold value being used as a criterion according to which it is judged that a communication apparatus to which power is to be supplied and which is connected to the connector requires power supply using the connector,

a time threshold value storage section for storing, in correspondence with each connector, a time threshold value being used as a criterion according to which it is judged that the frequency in which a communication apparatus to which power is to be supplied and which is connected to the connector requires power supply using the connector is lowered to the extent that no trouble occurs even if the power supply is stopped,

an elapsed time measurement section for starting the measurement of elapsed time in correspondence with each connector after the non-power-supply time zone reaching judgment section judges that the non-power-supply time zone is reached,

a power measurement value section for sequentially measuring, for each connector, the value of power supplied from the power supply control section using the power supply terminals of the connector at which the elapsed time measurement section started the measurement,

a power threshold value reaching judgment section for sequentially judging whether the power measurement value of the power measurement value section has reached the corresponding power threshold value stored in the power threshold value storage section or not,

an elapsed time initialization section for instructing the elapsed time measurement section to initialize the time measurement value for the corresponding connector and to restart measurement when the power threshold value reaching judgment section judges that the power measurement value reaching judgment section has reached the power threshold value, and

a time threshold value reaching judgment section for judging whether the corresponding time measurement value obtained by the elapsed time measurement section has reached the corresponding time threshold value stored in the time threshold value storage section or not when the power threshold value reaching judgment section judges that the power measurement value has not reached the power threshold value, wherein

the power supply stop section stops power supply using the corresponding connector after the time threshold value reaching judgment section judges that the time measurement value has reached the time threshold value.

7. A power supply control apparatus according to claim 5, further comprising:

a power threshold value storage section for storing, in correspondence with each connector, a power threshold value being used as a criterion according to which it is judged that a communication apparatus to which power is to be supplied and which is connected to the connector requires power supply using the connector,

a time threshold value storage section for storing, in correspondence with each connector, a time threshold value being used as a criterion according to which it is judged that the frequency in which a communication apparatus to which power is to be supplied and which is connected to the connector requires power supply using the connector is lowered to the extent that no trouble occurs even if the power supply is stopped,

an elapsed time measurement section for starting the measurement of elapsed time in correspondence with each connector after the non-power-supply time zone reaching judgment section judges that the non-power-supply time zone is reached,

a power measurement value section for sequentially measuring, for each connector, the value of power supplied from the power supply control section using the power supply terminals of the connector at which the elapsed time measurement section started the measurement,

a power threshold value reaching judgment section for sequentially judging whether the power measurement value of the power measurement value section has reached the corresponding power threshold value stored in the power threshold value storage section or not,

an elapsed time initialization section for instructing the elapsed time measurement section to initialize the time measurement value for the corresponding connector and to restart measurement when the power threshold value reaching judgment section judges that the power measurement value reaching judgment section has reached the power threshold value, and

a time threshold value reaching judgment section for judging whether the corresponding time measurement value obtained by the elapsed time measurement section has reached the corresponding time threshold value stored in the time threshold value storage section or not when the power threshold value reaching judgment section judges that the power measurement value has not reached the power threshold value, wherein

the power supply stop section stops power supply using the corresponding connector after the time threshold value reaching judgment section judges that the time measurement value has reached the time threshold value.

8. A power supply control apparatus comprising:

one or a plurality of connectors, each provided with a plurality of connection terminals and part or all of the connection terminals being power supply terminals for supplying power to communication apparatuses to be connected,

a connection confirmation signal application section for applying a signal, for confirming the connection of a communication apparatus to which power is to be supplied at predetermined timing, to the power supply terminals of each connector,

a power supply start section for starting power supply using the corresponding connector when it is confirmed by the application of the connection confirmation signal from the connection confirmation signal application section that a communication apparatus to which power is to be supplied is connected,

a power threshold value storage section for storing, in correspondence with each connector, a power threshold value being used as a criterion according to which it is judged that a communication apparatus connected to the connector requires power supply using the connector,

a time threshold value storage section for storing, in correspondence with each connector, a time threshold value being used as a criterion according to which it is judged that the frequency in which a communication apparatus connected to the connector requires power supply using the connector is lowered to the extent that no trouble occurs even if the power supply is stopped,

an elapsed time measurement section for starting the measurement of elapsed time in correspondence with each connector to which power supply is started by the power supply start section,

a power measurement value section for sequentially measuring, for each connector, the value of supplied power using the power supply terminals of the connector at which the elapsed time measurement section started the measurement,

a power threshold value reaching judgment section for judging whether the power measurement value obtained by the power measurement value section has reached the corresponding power threshold value stored in the power threshold value storage section or not,

an elapsed time initialization section for instructing the elapsed time measurement section to initialize the time measurement value for the corresponding connector and to restart measurement when the power threshold value reaching judgment section judges that any one of the power measurement values has reached the corresponding power threshold value,

a time threshold value reaching judgment section for sequentially judging whether each time measurement value obtained by the elapsed time measurement section has reached the corresponding time threshold value stored in the time threshold value storage section or not, and

a power supply stop section for stopping power supply using the corresponding connector when the time threshold value reaching judgment section judges that any one of the time measurement values has reached the corresponding time threshold value.

9. A power supply control apparatus according to claim 8, further comprising:

a response content storage section for previously storing a predetermined response content obtained when a communication apparatus to which power is to be supplied is connected to the connector and the connection confirmation signal is output from the connector, wherein

the power supply start section is provided with a connection confirmation section for confirming that a communication apparatus to which power is to be supplied is connected, by comparing the response content obtained in response to the application of the connection confirmation signal from the connection confirmation signal application section with the predetermined response content stored in the response content storage section.

10. A power supply control method comprising the steps of:

detecting a communication apparatus to which power is to be supplied when the communication apparatus is newly connected to one or any one of the a plurality of connectors, each provided with a plurality of connection terminals and part or all of the connection terminals being power supply terminals for supplying power to communication apparatuses to be connected,

starting power supply, when it is detected by the connection detection that a communication apparatus to which power is to be supplied is newly connected to any one of the connectors, to the communication apparatus connected to the corresponding connector using the connector,

sequentially comparing time data output from a clock with the corresponding time zone data in the time zone data indicating non-power-supply time zones each serving as a time zone during which the respective power supply terminals should stop power supply, the time zone being stored in a time zone data storage section in correspondence with each connector to which power supply is started by the start of power supply and of monitoring the reaching of each non-power-supply time zone,

stopping power supply using the corresponding connector when it is judged by the monitoring of the reaching of the non-power-supply time zone that any one of the non-power-supply time zones is reached,

sequentially comparing the time data with the corresponding time zone data in the time zone data storage section, for each connector, power supply to which is stopped by the power supply stop, and of monitoring the end of each non-power-supply time zone, and

resuming power supply using the corresponding connector when it is judged by the non-power-supply time zone end monitoring that any one of the non-power-supply time zones is ended.