JP2013219475A - Radio access point with wireless power supply function and radio communication terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio access point that is able to perform wireless power supply to a radio communication terminal and to activate the radio communication terminal on standby during the power supply, and a radio communication terminal that does not need beacon monitoring.SOLUTION: When a radio access point 2 receives communication data destined to a radio communication terminal 3 belonging to it from a cable network handling unit 209, it performs wireless power supply to the radio communication terminal 3 by high-frequency electric power generated by a high-frequency power supply unit 202. A message information transmission unit 204 transmits message information output from a relay control unit 200 by superposing it on the high-frequency electric power to the radio communication terminal 3, and a message information receiving unit 207 restores the message information from the radio communication terminal 3 included in a current value variation input from a current variation detection unit 205.

Description

  The present invention relates to a wireless access point and a wireless communication terminal having a wireless power feeding function.

  In recent years, various devices have come to be connected to networks, but communication devices that are placed in environments where there is no or difficult wiring environment for communication cables and power cables are wireless access points using wireless communication technology. It will be connected to the network via. In that case, the communication device is generally battery-powered, and it is necessary to periodically monitor the presence or absence of communication data addressed to its own terminal by receiving a beacon signal from a wireless access point even when in standby. Therefore, power consumption during standby cannot be ignored, and maintenance work related to battery replacement or charging is troublesome.

  As a technique for improving this, there is a so-called wireless power feeding technique in which power is fed wirelessly via electromagnetic waves, ultrasonic waves, a resonating magnetic field or electric field, laser light, or the like (for example, Patent Document 1).

  The technology described in Patent Document 1 acquires terminal information of a power-supplied device when power is supplied to a moving power-supplied device such as a wireless communication terminal, and power is supplied from the power supply side based on the terminal information. It is described that power is wirelessly supplied from a wireless access point to a wireless communication terminal that needs power supply by determining whether or not the power supply is required.

  However, the technique described in Patent Literature 1 is based on the premise that the wireless communication function of the wireless access point and the wireless communication terminal is activated, and the wireless communication function is not activated (for example, power In order to reduce consumption, there is a lack of consideration for the case where beacon monitoring is also stopped.

JP 2009-253762 A

  Accordingly, an object of the present invention is to supply power by wireless power feeding to a wireless communication terminal whose wireless communication function is not activated, and to perform wireless communication function of a wireless communication terminal whose wireless communication function is stopped by the wireless power feeding. It is an object to provide a wireless communication terminal that can activate a wireless communication point and a wireless communication terminal that does not require beacon monitoring.

  In order to solve the above problems, a wireless access point according to the present invention relays communication data between a wired network and one or more wireless communication terminals, and wirelessly supplies power to the wireless communication terminals in a contactless manner. Wireless power supply means for supplying power to the wireless communication terminal in a non-contact manner by a varying magnetic field or a varying electric field, wired communication means for communicating with a predetermined destination via the wired network, and the wireless communication Wireless communication means for wireless communication with a terminal, communication data relay means for relaying communication data between the wired communication means and the wireless communication means, and power supplied by the wireless power supply means are transmitted to the wireless communication terminal Power superimposition information transmission means for superimposing and transmitting message information or command information to be transmitted, When the communication data addressed to the wireless communication terminal in which the wireless communication means included in the wireless communication terminal is not activated is received from the wireless communication terminal, the power superimposition information transmitting means transmits the communication data to the wireless communication terminal in which the wireless communication means is not activated. Message information relating to the presence of communication data or an activation command relating to activation of the wireless communication terminal is transmitted.

  The wireless communication terminal according to the present invention is a wireless communication terminal belonging to the wireless access point, wireless power receiving means for receiving power in a non-contact manner by a varying magnetic field or a varying electric field, and the wireless access point and the wireless Wireless communication means for communicating; standby control means for executing control related to standby or activation of the own wireless communication terminal; and power superposition information receiving means for receiving message information superimposed on power received by the wireless power receiving means; And when the self-radio communication terminal is in a standby state, the standby control means when the power superimposition information receiving means receives message information indicating that communication data addressed to the self-radio communication terminal exists. Is characterized in that the own wireless communication terminal is changed from a standby state to an activated state.

  According to the present invention, it is possible to provide a wireless communication system capable of starting the wireless communication function of the wireless communication terminal from the wireless access point side even when the wireless communication function of the wireless communication terminal is not started. As a result, the wireless communication terminal does not need beacon monitoring even when waiting for incoming communication data (standby), and can reduce the power consumption of the rechargeable battery during standby.

Configuration diagram of wireless access point and wireless communication terminal according to the present invention Sequence diagram of wireless access point and wireless communication terminal according to the present invention Internal block diagram of a wireless access point according to the present invention Operational flow chart of wireless access point according to the present invention Block diagram of internal configuration of wireless communication terminal according to the present invention Operational flow chart of wireless communication terminal according to the present invention

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a wireless communication system (hereinafter sometimes abbreviated as the present system) using a wireless access point and a wireless communication terminal according to the present invention.

  With reference to FIG. 1, the configuration and functional outline of this system will be described. 1 is a wired network such as a LAN (Local Area Network) or a WAN (Wide Area Network), 2 is a wireless access point according to the present invention, and 3 is a wireless communication terminal according to the present invention connected to the wireless access point 2 by wireless communication. . The number of wireless communication terminals 3 belonging to the wireless access point 2 is N (arbitrary integer), and the upper limit depends on the processing capability of the wireless access point 2.

  When the wireless access point 2 operates by receiving power from a commercial power source or the like and receives communication data from the wired network 1 to the wireless communication terminal 3, message information indicating that the communication data has been received by the wireless communication terminal 3, or wireless communication When the terminal 3 is in a standby state, the message information related to activation is superimposed on the high frequency power of the wireless power supply and transmitted. When the message information requesting the start of the wireless power supply is received from the wireless communication terminal 3, the message information is generated by the high frequency power. Power supply is started by wireless power feeding in which power is fed in a non-contact manner by a varying magnetic field or a varying electric field, and communication data from the wired network 1 is relayed. Details of the operation of the wireless access point 2 will be described later.

  When the wireless communication terminal 3 receives message information indicating that the communication data from the wireless access point has been received or message information related to activation, the wireless communication terminal 3 activates the own wireless communication terminal. Also, if it is determined that the charging state of the secondary battery provided in the own wireless communication terminal is not sufficient, the message information relating to the activation of the wireless power supply is transmitted to the wireless access point to which the wireless power supply belongs and operates with the power received by the wireless power supply. . The transmission of the message information is notified to the wireless access point by changing the load value of the variable load to which the power received by the wireless communication or wireless power receiving means is applied. Details of the operation of the wireless communication terminal 3 will be described later.

  FIG. 2 is a sequence diagram of the wireless access point 2 and the wireless communication terminal 3. A signal flow in wireless communication and wireless power feeding will be described.

  One or more wireless communication terminals 3 belong to the wireless access point 2. Here, when the communication data from the wired network 1 to the wireless communication terminal 3-1 is received, the wireless communication terminal 3-2 is used. A case will be described as an example in which wireless power supply to the wireless communication terminal 3-1 is performed in response to a request from.

  When message information related to activation of wireless power supply is received from the wireless communication terminal 3-2 (S201), the wireless access point 2 activates wireless power supply (S202), and starts wireless power supply to the wireless communication terminal 3-2 ( S203). The wireless communication terminal 3-2 starts charging the power storage unit 301 (described later) with the wirelessly received power (S204).

  Next, when the wireless access point 2 receives communication data addressed to the wireless communication terminal 3-1 belonging to the wired network 1 (S205), the wireless access point 2 starts wireless power feeding to the wireless communication terminal 3-1 ( S206).

  Here, the wireless power feeding means is a magnetic field resonance method that resonates at a plurality of predetermined frequencies (for example, 950 to 970 MHz), and the frequency at which the wireless communication terminal 3-1 and the wireless communication terminal 3-2 resonate is It shall be separate. Therefore, wireless power feeding can be started separately in S203 and S206. Note that the frequencies that resonate in all the wireless communication terminals 3 may be the same.

  In S206, the wireless power supply to the wireless communication terminal 3-1 is started, so that the wireless communication terminal 3-1 can receive communication data and starts charging the power storage unit 301 (described later) (S207). ). Then, the wireless access point 2 transmits data reception notification message information indicating that the communication data addressed to the wireless communication terminal 3-1 has been received to the wireless communication terminal 3-1 (S208).

  Upon receiving the data reception notification message information, the wireless communication terminal 3-1 activates the communication function (S209), starts wireless communication with the wireless access point 2, and transmits a communication data reception request to the wireless access point 2. The communication data received in S205 from the wireless access point 2 is received (S210).

  During this wireless communication, message information for requesting the continuation of wireless power supply is continuously transmitted to the wireless access point 2 at a predetermined time interval (for example, every 5 minutes) in order to continue receiving power by wireless power supply. If the message information requesting the continuation of the wireless power supply is received within a predetermined time, the wireless access point 2 continues the wireless power supply (not shown). The reason for providing the duration of wireless power supply per time is to prevent the wireless access point 2 from overheating when the wireless power supply is continuously continued for a long time.

  Further, the wireless access point 2 receives a power supply stop request command (S211) from the wireless communication terminal 3-2 that has completed charging, and a power supply stop request command (S212) from the wireless communication terminal 3-1 that has also completed wireless communication and charging. ) Is received, it means that a power supply stop request command has been received from all the wireless communication terminals 3 to which it belongs, and it is determined that the wireless power supply stop condition is satisfied, and wireless power supply is stopped (S213).

  Here, the wireless power supply stop condition is that when a predetermined longest time (for example, 30 minutes) has elapsed since the wireless power supply unit was activated in addition to the reception of message information related to the wireless power supply stop, Even when a predetermined time (for example, 5 minutes) elapses after activation, the predetermined message information requesting to continue the wireless power feeding may not be received.

  Next, the internal block configuration and function of the wireless access point 2 will be described. FIG. 3 is an example of the internal block configuration of the wireless access point 2 according to the present invention.

  The relay control unit 200 controls each unit in the wireless access point 2, relays communication data between the wired network corresponding unit 209 and the wireless communication unit 208, and also belongs to the wireless communication terminal via the message information transmission unit 204 Message information is sent to 3. Further, according to the message information received from the wireless communication terminal 3 via the message information receiving unit 207, the high frequency power supply unit 202 is controlled to start or stop the wireless power feeding.

  The power supply unit 201 supplies a predetermined voltage to each unit of the wireless access point, and supplies power to the high frequency power supply unit 202 during wireless power feeding operation.

  The high frequency power supply unit 202 is means for converting power from the power supply unit 201 into high frequency power for magnetic field resonance (for example, 13.56 MHz), and is activated / stopped by an instruction from the relay control unit 200.

  The matching circuit unit 203 is a matching circuit for supplying high frequency power from the high frequency power supply unit 202 by magnetic field resonance.

  The message information transmission unit 204 is means for superimposing the message information output from the relay control unit 200 on the high frequency power output from the matching circuit unit 203. For example, the high frequency power from the matching circuit unit 203 is used as the message information. Modulate (eg, ASK modulation or PSK modulation). Note that this modulation may be executed inside the high frequency power supply unit 202.

  The current fluctuation detecting unit 205 monitors the current value fluctuation of the high frequency power flowing into the power feeding device 206, outputs the detected current value fluctuation to the message information receiving unit 207, and receives the message information from the wireless communication terminal 3. . The current value fluctuation is caused by the fluctuation of the load value of the load fluctuation unit 304 to which the power wirelessly received by the wireless communication terminal 3 is applied, and the wireless communication terminal 3 controls the fluctuation of the load value according to the message information. (Details will be described later).

  Note that the current fluctuation detection unit 205 also passes message information transmitted to the wireless communication terminal 3 superimposed by the message information transmission unit 204, but message information transmitted to the wireless communication terminal 3 and message received from the wireless communication terminal 3. If a combination of communication methods in which information does not interfere (for example, a combination of ASK modulation and PSK modulation), transmission / reception of message information with the wireless communication terminal 3 can be executed simultaneously.

  If it is necessary to completely prevent the interference between the message information transmitted to the wireless communication terminal 3 and the message information received from the wireless communication terminal 3, the timing should be controlled so that the transmission and reception of the message information are not performed simultaneously. Good (for example, half-duplex communication method).

  The power feeding device 206 is a device including a power feeding coil, and emits a fluctuating electromagnetic field generated by high frequency power for magnetic field resonance to the wireless communication terminal 3.

  The message information receiving unit 207 modulates the current value input from the current variation detecting unit 205, that is, the message information transmitting unit 308 in the wireless communication terminal 3 with message information (for example, PSK modulation, PWM modulation, PCM modulation, etc.) The load value fluctuation of the load fluctuation unit 304 in the wireless communication terminal 3 is restored to the message information.

  The wireless communication unit 208 performs local wireless communication with the wireless communication terminal 3 belonging to the own wireless access point via the wireless antenna 210, and outputs communication data from the wireless communication terminal 3 to the relay control unit 200. . Alternatively, the communication data from the relay control unit 200 is output to the wireless communication terminal 3.

  The wired network corresponding unit 209 performs wired local communication with the wired network 1 (for example, LAN or WAN), and outputs communication data from the wired network 1 to the relay control unit 200. Alternatively, the communication data from the relay control unit 200 is output to the wired network 1.

  The wireless antenna 210 is used for transmission / reception of wireless communication data with the wireless communication terminal 3.

  The power supply timer 211 measures the elapsed time since the start of wireless power supply, and notifies the relay control unit 200 of the elapse of the basic power supply time and the expiration of the longest power supply time.

  FIG. 4 is an operation flowchart of the wireless access point 2 according to the present invention. Hereinafter, the operation flow of the wireless access point 2 will be described with reference to FIG.

  This flow starts with one or more wireless communication terminals 3 belonging to the wireless access point 2 (S400). If no communication data is received (S401, NO), the flow proceeds to S406, and in S406. If message information has not been received (S406, NO), the process proceeds to S411. If the maximum power supply time (described later) has not expired in S411 (S411, NO), the process returns to S401. Thereafter, this is repeated, and reception of communication data or message information is awaited.

  In S401, when the communication data addressed to the wireless communication terminal 3 belonging to the own wireless access point 2 is received from the wired network 1 (S401, YES), the relay control unit 200 confirms the activation state of the wireless power feeding, and wirelessly If the power supply is stopped (S402, NO), the relay control unit 200 starts the wireless power supply by controlling the high frequency power supply unit 202 and starts a power supply timer (S403). The wireless communication terminal 3 that is the destination of the communication data is notified of the reception of the communication data from the message information transmission unit 204 (S404), and the process proceeds to S405. If wireless power feeding is being activated (S402, YES), S403 and S404 are skipped and the process proceeds to S405.

  In S405, the relay control unit 200 transmits the communication data received from the wired network 1 to the wireless communication terminal 3 that is the destination via the wireless communication unit 208 (S405).

  In addition, since the flow at the time of receiving the communication data transmitted to the wired network 1 from the wireless communication terminal 3 is the same as the processing flow in the conventional wireless access point, the processing flow is omitted in FIG. .

  After transmitting the communication data to the wireless communication terminal 3 in S405, the timer started in S403 is monitored, and the elapsed time since the start of wireless power supply is the basic power supply time (for example, 5 minutes) or the longest time for power supply (for example, , 30 minutes) is not exceeded (S412, NO), the process returns to S401. If either the power supply basic time or the power supply longest time has exceeded (S412, YES), the process proceeds to S414, and wireless power supply is stopped.

  The maximum power supply time is a set time for preventing the wireless access point 2 from being overheated due to the wireless power supply. When the wireless power supply is stopped beyond the maximum power supply time, a certain cooling time has elapsed. Or until the in-machine temperature becomes a certain value (for example, 40 ° C.) or less, the relay control unit 200 prohibits the restart of the wireless power feeding. However, the wireless communication unit 208 is operating even when the wireless power feeding is stopped or prohibited from being restarted, and communication data is relayed between the wired network 1 and the wireless communication terminal 3 that does not require wireless power reception. Is possible.

  Next, processing when the message information receiving unit 207 receives message information from the wireless communication terminal 3 will be described. In S406, when the message information receiving unit 207 receives message information from the wireless communication terminal 3 (S406, YES), the relay control unit 200 determines whether or not the received message information is a power supply request. If (S407, YES), the process proceeds to S402, and the processes after S402 described above are executed.

  In S407, if the received message information is not a power supply request (S407, NO), it is determined whether it is a power supply stop request (S408). If the received message information is a power supply stop request (S408, YES) and the other wireless communication terminal 3 to which the message belongs is not receiving wireless power (S413, YES), the wireless power supply is stopped (S414). In S413, if any of the other wireless communication terminals 3 to which the terminal belongs is receiving wireless power (S413, NO), the process proceeds to S411. If the received message information is not a power supply stop request in S408 (S408, NO), the process proceeds to S409.

  In S409, if the received message information is a power supply continuation request (S409, YES), the power supply timer that measures the power supply basic time is reset (S410). This basic power supply time is a basic unit of time for wireless power supply. If no power supply continuation request is received from the wireless communication terminal 3 within this basic power supply time, the wireless communication terminal 3 does not require wireless power reception or wireless communication. It is determined that the terminal 3 has gone out of the wireless power supply range. Even if the power supply timer that measures the basic power supply time is reset in step S410, the measurement of the longest power supply time continues.

  In S411, if either of the measurement of the maximum power supply time or the power supply continuation time has expired, the relay control unit 200 controls the high frequency power supply unit 202 to stop the wireless power supply (S414), and returns to S401.

  If the high frequency power supply unit 202 can output high frequency power of a plurality of frequencies equal to or more than the number of wireless communication terminals 3 to which it belongs or the number of groups of the wireless communication terminals 3, the power supply is stopped in S414. It is possible to stop only the wireless power feeding to the requested wireless communication terminal 3 or the group of the wireless communication terminals 3.

  Next, the internal block configuration and function of the wireless communication terminal 3 will be described. FIG. 5 is an example of an internal block configuration of the wireless communication terminal 3 according to the present invention.

  The control unit 300 controls each unit in the wireless communication terminal 3 to transmit / receive communication data to / from the wireless communication unit 307, to notify the message information transmitting unit 308 of message information to the associated wireless access point 2, and to receive message information In accordance with the message information demodulated by the unit 306, the standby wireless communication terminal is activated. Further, if the power storage unit 301 notifies that the power storage is insufficient and wireless power reception is not being performed, a power supply request command is sent to the wireless access point 2 via the message information transmission unit 308. Send regularly. Further, if the power storage unit 301 notifies that the power storage is sufficient and wireless power reception is in progress, a power supply stop request command is transmitted to the wireless access point 2 via the message information transmission unit 308.

  The power storage unit 301 is a unit that accumulates the power converted into the DC voltage by the power conversion unit 302. For example, a large-capacity capacitor or a chargeable / dischargeable secondary battery is applicable. The accumulated power is supplied to each unit in the terminal, and the accumulation state of power is monitored, and when the state changes from insufficient storage to sufficient or from sufficient storage to insufficient, the state is transferred to the control unit 300. Notify of changes.

  The power conversion unit 302 converts the received high-frequency power into a predetermined DC voltage, outputs the converted DC voltage to the power storage unit 301, and notifies the control unit 300 that the wireless power supply is received from the wireless access point 2. Notice.

  The matching circuit unit 303 is a matching circuit for receiving high frequency power by magnetic field resonance from the high frequency fluctuation electromagnetic field received by the power receiving device 305.

  The load changing unit 304 is a means for transmitting message information to the wireless access point 2, and in accordance with an instruction from the message information transmitting unit 308, a value of a load to which power supplied wirelessly from the wireless access point 2 is applied is indicated by message information. Modulate (for example, PSK modulation, PWM modulation, PCM modulation, etc.). As the modulation of the load value, although not shown, an element (for example, a field effect transistor) capable of electronically controlling the resistance value is inserted in series or in parallel in the output section of the matching circuit section 303, and the resistance value is converted into message information. It may be controlled so as to vary according to the above. Then, the fluctuation of the input current from the power receiving device 305 occurs according to the fluctuation of the resistance value, and the fluctuation of the current value is transmitted as the fluctuation of the current value flowing through the power feeding device 206 of the wireless access point 2 that is the power feeding source of the wireless power feeding.

  In addition, instead of performing fluctuation control of the current flowing by the power received wirelessly with the message information, it is also possible to transmit the message information to the wireless access point 2 by a wireless communication method independent of wireless power feeding (not shown).

  The power receiving device 305 is a device that includes a coil that receives power wirelessly supplied from the wireless access point 2 and receives a high-frequency fluctuating electromagnetic field for magnetic field resonance emitted from the wireless access point 2.

  The message information receiving unit 306 demodulates the modulated signal (for example, ASK modulation or PSK modulation) superimposed on the high frequency power received from the wireless access point 2 via the power receiving device 305 and the matching circuit unit 303 to obtain message information. It is a means to extract. The extracted message information is output to the control unit 300.

  The wireless communication unit 307 is a connection means with the wireless access point 2 and executes wireless local communication and outputs communication data from the wireless access point 2 to the control unit 300 or communication data from the control unit 300 Is output to the wireless access point 2.

  The message information transmitting unit 308 controls the load value of the load changing unit 304 according to the message information notified from the control unit 300.

  The wireless antenna 309 is an antenna for executing wireless local communication with the wireless access point 2. The power supply timer 310 measures the elapsed time since the start of transmission / reception of communication data and message information and wireless power reception, and in particular the timing at which the power supply continuation request command should be periodically transmitted before the basic power supply time elapses. Notify the controller 300.

  FIG. 6 is an operation flowchart relating to wireless power reception of the wireless communication terminal 3 according to the present invention. Note that the operation flow related to transmission / reception of communication data with the wireless access point 2 is the same as that of a normal wireless communication terminal, and is omitted in this flow. Hereinafter, the operation flow of the wireless communication terminal 3 will be described with reference to FIG.

  This flow starts when the wireless communication terminal 3 belongs to the wireless access point 2 (S600). If the wireless communication terminal 3 is not in the activated state (S601, NO), the flow proceeds to S610, and message information must be received in S610. If (S610, NO), the process returns to S601. Thereafter, this is repeated and reception of message information is awaited.

  In S601, if the own wireless communication terminal 3 is in the activated state (S601, YES), the control unit 300 confirms the power receiving state of the power conversion unit 302. If not wirelessly receiving (S602, NO), the control unit 300 Transmits a power supply request command from the message information transmission unit 308 to the wireless access point 2 (S603), and proceeds to S604.

  When high-frequency power of wireless power feeding received from the wireless access point 2 is input to the power conversion unit 302 via the power receiving device 305 and the matching circuit unit 303, wireless power reception is in progress (S602, YES), and the power conversion unit 302 Supplies power to the power storage unit 301 and notifies the control unit 300 that it is wirelessly receiving power.

  In S604, it is determined that the electric power stored in the power storage unit 301 is not at a predetermined amount of stored electric power that can supply the voltage and current required by each block in the wireless communication terminal 3, or that the secondary battery needs to be charged. Then (S604, YES), every time the power supply timer (power supply basic time) expires (S605, YES), the message information transmission unit 308 transmits a power supply continuation request command to the wireless access point 2 (S606).

  Further, when the control unit 300 determines that the power storage to the secondary battery is sufficient based on the storage amount information from the power storage unit 301 (S604, NO), the control unit 300 confirms whether the wireless communication unit 307 is performing wireless communication, If the wireless communication has ended (S607, YES), the message information transmission unit 308 transmits a power supply stop request command to the wireless access point 2 (S608), sets the own wireless communication terminal 3 in a standby state (S609), and power. Reduce consumption. In the standby state of the wireless communication terminal 3 according to the present invention, since it can be activated by wireless power reception, periodic beacon monitoring in the case of a normal wireless communication terminal is unnecessary, and the standby power consumption is reduced to 0. I can do it.

  Next, processing when the message information receiving unit 306 receives message information from the wireless access point 2 will be described. In S610, when the demodulated message information is notified from the message information receiving unit 306 to the control unit 300 (S610, YES), the control unit 300 analyzes the content of the message information and transmits communication data addressed to the own wireless communication terminal 3. If it is a reception notification (S611, YES), the own wireless communication terminal 3 is shifted to the activated state (S612), the wireless communication function of the wireless communication unit 307 is enabled, and wireless communication with the wireless access point 2 is started.

  In S612, the own wireless communication terminal 3 that has shifted to the activated state has completed transmission and reception of communication data. Although the process shifts to the standby state in S609, other than that, it may automatically shift to the standby state due to various timeouts (not shown).

  Heretofore, an example of the embodiment of the present invention has been described. ADVANTAGE OF THE INVENTION According to this invention, the radio | wireless access point and radio | wireless communication terminal which make the radio | wireless communication terminal in a standby state start state by the start of wireless electric power feeding, and start radio | wireless communication can be provided.

  In the embodiment described above, the magnetic field resonance method has been described as an example of the wireless power feeding method. However, various types of wireless such as an electromagnetic coupling type and an electric field coupling type in which power is supplied in a non-contact manner with a varying magnetic field or a varying electric field. General power supply technology is applicable.

DESCRIPTION OF SYMBOLS 1 ... Wired network 2 ... Wireless access point 3 ... Wireless communication terminal 200 ... Relay control part 201 ... Power supply part 202 ... High frequency power supply part 203 ... Matching circuit part 204 ... Message information transmission unit 205 ... Current fluctuation detection unit 206 ... Power supply device 207 ... Message information reception unit 208 ... Wireless communication unit 209 ... Wired network compatible unit 210 ... Wireless antenna 211 ..Power supply timer 300 ... Control unit 301 ... Power storage unit 302 ... Power conversion unit 303 ... Matching circuit unit 304 ... Load fluctuation unit 305 ... Power receiving device 306 ... Message information reception Unit 307 ... wireless communication unit 308 ... message information transmission unit 309 ... wireless antenna 310 ... power feeding timer

Claims (8)

A wireless access point that relays communication data between a wired network and one or more wireless communication terminals and supplies power to the wireless communication terminals in a contactless manner,
Wireless power feeding means for feeding power to the wireless communication terminal in a non-contact manner by a varying magnetic field or a varying electric field, wired communication means for communicating with a predetermined destination via the wired network, and wireless communication with the wireless communication terminal Message information or command to be transmitted to the wireless communication terminal to wireless communication means, communication data relay means for relaying communication data between the wired communication means and the wireless communication means, and power supplied by the wireless power supply means Power superimposition information transmission means for superimposing and transmitting information,
When the communication data addressed to the wireless communication terminal in which the wireless communication means included in the wireless communication terminal is not activated is received from the wired network, the power superimposition information transmitting means is a wireless communication terminal in which the wireless communication means is not activated A wireless access point having a wireless power feeding function, wherein message information relating to the presence of the communication data or an activation command relating to activation of the wireless communication terminal is transmitted to. The wireless access point according to claim 1,
A communication request received by the wireless communication unit or a power supply request command for requesting wireless power supply included in a fluctuation in a current value of a current flowing in a predetermined output device included in the wireless power supply unit is received from any of the wireless communication terminals. In this case, the wireless access point has a wireless power supply function, wherein the wireless power supply means starts wireless power supply. The wireless access point according to claim 1 or 2,
Wireless communication receiving power supplied by the wireless power supply unit when it is detected that all of the wireless communication terminals supplied by the wireless power supply unit do not exist in the communicable area of the wireless communication unit When a power supply stop request command for requesting stop of wireless power supply is received from all of the terminals, when the predetermined longest time has elapsed since the wireless power supply means is started, the wireless power supply means is started in advance. The wireless power supply function, wherein the wireless power supply means stops the wireless power supply in any case where a power supply continuation request command for requesting continuation of the wireless power supply is not received even after a predetermined time has elapsed. A wireless access point. A wireless access point according to any one of claims 1 to 3,
A wireless access point having a wireless power feeding function, wherein the wireless power feeding means is compatible with a magnetic field resonance method that resonates at a specific frequency. The wireless access point according to claim 4, wherein
The specific frequency is one of a plurality of predetermined frequencies, and each of the plurality of predetermined frequencies corresponds to one of the one or more wireless communication terminals. Wireless access point with wireless power supply function. A wireless communication terminal belonging to the wireless access point according to claim 1,
Wireless power receiving means for receiving power in a non-contact manner by a varying magnetic field or a varying electric field, wireless communication means for wirelessly communicating with the wireless access point, and standby control means for executing control related to standby or activation of the own wireless communication terminal Power superimposing information receiving means for receiving message information superimposed on the power received by the wireless power receiving means,
When the self-radio communication terminal is in a standby state, when the power superimposition information receiving unit receives message information indicating that communication data addressed to the self-radio communication terminal exists, the standby control unit A wireless communication terminal, wherein the wireless communication terminal is changed from a standby state to an activated state. A wireless communication terminal belonging to the wireless access point according to claim 6,
Wireless charging means for charging a secondary battery included in the self-radio communication terminal with power received by the wireless power receiving means, and charge determination means for determining whether or not the secondary battery needs to be charged are further included. And
When the charge determination unit determines that the secondary battery needs to be charged, a power supply request command for requesting wireless power supply is transmitted to the wireless access point, and the charge determination unit does not need to charge the secondary battery. A wireless power supply terminal that transmits a power supply stop request command for requesting the wireless access point to stop wireless power supply. The wireless communication terminal according to claim 6 or 7,
A load value control means for controlling a load value of a variable load to which the power received by the wireless power receiving means is applied;
The load value control means is controlled to vary the load value of the variable load according to message information or command information to be transmitted to the wireless access point, and a current flowing through a predetermined output device provided in the wireless access point A wireless communication terminal, wherein the message information or command information is transmitted to the wireless access point as a change in current value.

Images