JP5769233B2 - Base station equipment - Google Patents

Description

  The present invention relates to a base station device configured to be capable of wireless communication with a terminal device.

  A base station device configured to be able to perform wireless communication with a terminal device is known.

  A base station apparatus described in Patent Document 1 as one of this type of base station apparatus is a base station apparatus conforming to IEEE (The Institute of Electrical and Electronics Engineers, Inc.) 802.11.

  The base station apparatus holds the data addressed to the individual terminal set as the transmission destination by the terminal apparatus operating in the power save mode. In the power save mode, the state of the terminal device is set in a standby state (sleep state) in which wireless communication is not possible in a part of a preset period, and in a normal state (awake state) in which wireless communication is possible in another period. In this mode, the state of the terminal device is set.

  The base station apparatus transmits a notification indicating that the data destined to the individual terminal is to be transmitted when the data destined for the individual terminal is held every time a preset notification signal transmission interval (beacon interval) elapses. A notification signal (beacon) including information is transmitted to the terminal device.

When the terminal device receives the broadcast signal including the transmission schedule information, the terminal device transmits a control signal (PS-Poll) indicating that transmission of data destined for the individual terminal is requested to the base station device.
And when a base station apparatus receives a control signal from a terminal device, it transmits the data addressed to the individual terminal held to the terminal device.

  By the way, the terminal device stops supplying power to a circuit for performing wireless communication during a period in which the state of the terminal device is set to the standby state. Thereby, compared with the case where the state of a terminal device is always set to a normal state, the quantity of the electric power which a terminal device consumes can be reduced.

JP 2010-263549 A

  However, the base station apparatus is set to a normal state in which the base station apparatus can perform wireless communication even during a period in which wireless communication is not performed with the terminal apparatus. Therefore, the base station apparatus has a problem that power is wasted.

  Therefore, an object of the present invention is to provide a base station apparatus capable of solving the above-described problem “the case where power is consumed wastefully” occurs.

  In order to achieve such an object, a base station apparatus according to an aspect of the present invention is an apparatus configured to be capable of wireless communication with at least one terminal apparatus.

Furthermore, this base station apparatus
In the power save mode in which the state of the own device is set in a standby state where wireless communication is not possible in some preset period, and the state of the own device is set in a normal state where wireless communication is possible in other periods Individual terminal-addressed data holding means for holding data addressed to an individual terminal set as a transmission destination by the operating terminal device;
Each time a preset notification signal transmission interval elapses, a notification signal including transmission schedule information indicating that the individual terminal addressed data is scheduled to be transmitted when the individual terminal addressed data is held, A notification signal transmitting means for transmitting to the terminal device;
When receiving a control signal indicating that the transmission of the data destined for the individual terminal is requested from the terminal device, a data transmitting means for individual terminal destined to transmit the data destined for the individual terminal to the terminal device;
When all of the terminal devices capable of wireless communication with the base station device are operating in the power save mode, when not holding the data addressed to the individual terminal, the notification signal is transmitted. Control means for setting the state of the base station device in a period until the next transmission of the notification signal to a standby state incapable of wireless communication with the terminal device;
Is provided.

In addition, a base station apparatus control method according to another aspect of the present invention includes:
Applied to a base station device configured to be capable of wireless communication with at least one terminal device;
In the power save mode in which the state of the own device is set in a standby state where wireless communication is not possible in some preset period, and the state of the own device is set in a normal state where wireless communication is possible in other periods The terminal device that operates operates the data addressed to the individual terminal set as the transmission destination,
Each time a preset notification signal transmission interval elapses, transmission schedule information indicating that the base station apparatus intends to transmit the data destined for the individual terminal when the base station apparatus holds the data destined for the individual terminal. Including the notification signal including the terminal device,
When receiving a control signal indicating that transmission of the data addressed to the individual terminal is requested from the terminal device, the data addressed to the individual terminal is transmitted to the terminal device,
When all of the terminal devices capable of wireless communication with the base station device are operating in the power save mode, when the base station device does not hold the data addressed to the individual terminal, This is a method of setting the state of the base station apparatus in a period from the transmission of the notification signal to the next transmission of the notification signal to a standby state incapable of wireless communication with the terminal device.

In addition, a base station apparatus control program according to another aspect of the present invention is
To a base station device configured to be capable of wireless communication with at least one terminal device,
In the power save mode in which the state of the own device is set in a standby state where wireless communication is not possible in some preset period, and the state of the own device is set in a normal state where wireless communication is possible in other periods The terminal device that operates operates the data addressed to the individual terminal set as the transmission destination,
Each time a preset notification signal transmission interval elapses, transmission schedule information indicating that the base station apparatus intends to transmit the data destined for the individual terminal when the base station apparatus holds the data destined for the individual terminal. Including the notification signal including the terminal device,
When receiving a control signal indicating that transmission of the data addressed to the individual terminal is requested from the terminal device, the data addressed to the individual terminal is transmitted to the terminal device,
When all of the terminal devices capable of wireless communication with the base station device are operating in the power save mode, when the base station device does not hold the data addressed to the individual terminal, A program for executing a process for setting a state of the base station apparatus in a period from transmission of a broadcast signal to transmission of the broadcast signal next to a standby state incapable of wireless communication with the terminal apparatus. is there.

  Moreover, the radio | wireless communications system which is the other form of this invention is a system provided with at least 1 terminal device and the base station apparatus comprised so that radio | wireless communication with the said terminal device was possible.

Furthermore,
The terminal device sets its own device state in a standby state where wireless communication is disabled during a predetermined period, and sets its own device state in a normal state where wireless communication is possible during another period. Configured to operate in power save mode,
The base station device is
Individual terminal-addressed data holding means for holding the data addressed to the individual terminal set as a transmission destination by the terminal device operating in the power save mode;
Each time a preset notification signal transmission interval elapses, a notification signal including transmission schedule information indicating that the individual terminal addressed data is scheduled to be transmitted when the individual terminal addressed data is held, A notification signal transmitting means for transmitting to the terminal device;
With
The terminal device further includes:
When receiving the broadcast signal from the base station apparatus, when the broadcast signal includes the transmission schedule information, control for transmitting to the base station apparatus a control signal indicating that transmission of the data addressed to the individual terminal is requested Comprising signal transmission means,
The base station device further includes:
When the control signal is received from the terminal device, individual terminal-addressed data transmission means for transmitting the held individual terminal-addressed data to the terminal device;
When all of the terminal devices capable of wireless communication with the base station device are operating in the power save mode, when not holding the data addressed to the individual terminal, the notification signal is transmitted. Control means for setting the state of the base station device in a period until the next transmission of the notification signal to a standby state incapable of wireless communication with the terminal device;
Is provided.

In addition, a wireless communication control method according to another aspect of the present invention includes:
Applied to a wireless communication system comprising at least one terminal device and a base station device configured to be capable of wireless communication with the terminal device;
In the power save mode in which the state of the own device is set in a standby state where wireless communication is not possible in some preset period, and the state of the own device is set in a normal state where wireless communication is possible in other periods The terminal device operates,
The base station device holds the data addressed to the individual terminal set as the transmission destination of the terminal device operating in the power save mode,
Each time a preset notification signal transmission interval elapses, transmission schedule information indicating that the base station apparatus intends to transmit the data destined for the individual terminal when the base station apparatus holds the data destined for the individual terminal. Including a notification signal including the terminal device,
When the terminal device receives the notification signal from the base station device, when the notification signal includes the transmission schedule information, a control signal indicating that transmission of the data addressed to the individual terminal is requested is transmitted to the base station To the device,
When the base station device receives the control signal from the terminal device, it transmits the held individual terminal addressed data to the terminal device,
When all of the terminal devices capable of wireless communication with the base station device are operating in the power save mode, when the base station device does not hold the data addressed to the individual terminal, This is a method of setting the state of the base station apparatus in a period from the transmission of the notification signal to the next transmission of the notification signal to a standby state incapable of wireless communication with the terminal device.

  By configuring as described above, the present invention can reduce the amount of power that is wasted.

It is a figure showing schematic structure of the radio | wireless communications system which concerns on 1st Embodiment of this invention. It is a figure showing the structure of the base station apparatus which concerns on 1st Embodiment of this invention. 5 is a timing chart showing an example of a broadcast signal transmission interval, a data transmission interval addressed to all terminals, and a broadcast signal reception interval set in advance in the wireless communication system according to the first embodiment of the present invention. It is a figure showing the function which concerns on this invention among the functions of the radio | wireless communications system which concerns on 1st Embodiment of this invention. It is the flowchart which showed the process which the base station apparatus which concerns on 1st Embodiment of this invention performs. It is a figure showing the function of the base station apparatus which concerns on 2nd Embodiment of this invention.

  Hereinafter, embodiments of a base station apparatus, a base station apparatus control method, a base station apparatus control program, a radio communication system, and a radio communication control method according to the present invention will be described with reference to FIGS. .

<First Embodiment>
(Constitution)
As shown in FIG. 1, the wireless communication system 1 according to the first embodiment includes a base station device 10 and a plurality of terminal devices 20. Note that the wireless communication system 1 may include only one terminal device 20.

The base station apparatus 10 is a communication apparatus that constitutes a wireless LAN (Local Area Network) access point compliant with IEEE (The Institute of Electrical and Electronics Engineers, Inc.) 802.11. In this example, the base station apparatus 10 operates in the infrastructure mode.
The base station device 10 is configured to be capable of wireless communication with each of the plurality of terminal devices 20,.

  The base station apparatus 10 is connected to a communication line (in this example, a communication line constituting an IP (Internet Protocol) network) NW via a communication cable. The base station device 10 is configured to be able to communicate with other devices connected via the communication line NW.

  Each terminal device 20 is a communication device that constitutes a wireless LAN client that complies with IEEE 802.11. In this example, each terminal device 20 is a personal computer. Each terminal device 20 may be a mobile phone terminal, a PHS (Personal Handyphone System), a PDA (Personal Data Assistance, Personal Digital Assistant), a smartphone, a car navigation terminal, or a game terminal.

  Each terminal device 20 operates in one of an active mode and a power save mode. The active mode is a mode in which the state of the terminal device 20 (own device) is always set to a normal state (Awake) in which wireless communication is possible. The power save mode is a mode in which the state of the own device is set in a standby state (Sleep) where wireless communication is not possible in a predetermined period, and the state of the own device is set in a normal state in another period. It is.

  In the wireless communication system 1, as shown in FIG. 3, a notification signal transmission interval INT1, a data transmission interval INT2 addressed to all terminals, and a notification signal reception interval (Listen Interval) INT3 are set in advance. The notification signal transmission interval INT1 is an interval at which a later-described notification signal (beacon) is transmitted from the base station device 10 to the terminal device 20.

  The data transmission interval INT2 addressed to all terminals is an interval at which data destined for all terminals to be described later is transmitted from the base station device 10 to the terminal device 20. The data transmission interval INT2 addressed to all terminals is an interval obtained by multiplying the notification signal transmission interval INT1 by an integral multiple (5 times in this example).

  The broadcast signal reception interval INT3 is an interval at which the terminal device 20 receives a broadcast signal to be described later from the base station device 10. The notification signal reception interval INT3 is an interval obtained by multiplying the notification signal transmission interval INT1 by an integral multiple (3 times in this example).

  When each terminal device 20 operates in the power save mode, every time the data transmission interval INT2 addressed to all terminals elapses, all terminal devices 20 are periods from when the notification signal is transmitted until the next notification signal is transmitted. In the terminal-addressed data transmission period TA, the state of the own device is set to the normal state.

  Furthermore, when each terminal device 20 operates in the power save mode, each time the notification signal reception interval INT3 elapses, a notification signal is transmitted and a preset time (in this example, the notification signal transmission interval). In a period TP until a time shorter than INT1 elapses, the state of the own apparatus is set to the normal state.

  In addition, each terminal device 20 sets its own device state to a standby state in a period other than the data transmission period TA for all terminals and the period TP. The terminal device 20 sets the state of its own device to a standby state by stopping the supply of power to a circuit that performs wireless communication.

Next, the base station apparatus 10 will be described in more detail.
As shown in FIG. 2, the base station apparatus 10 includes a wireless LAN communication unit 100, a system control unit 11, and a wired LAN communication unit 12.

  The wireless LAN communication unit 100 performs wireless communication with each of the plurality of terminal devices 20. The wireless LAN communication unit 100 includes an antenna 101, a wireless transceiver 102, a baseband processing unit 103, a wireless LAN control unit 104, and a memory 105.

  The antenna 101 is configured to radiate (transmit) radio waves (electromagnetic waves) as radio signals to the outside and receive radio waves as radio signals from the outside.

  The radio transceiver 102 adjusts the amplitude of the radio signal received via the antenna 101 and outputs the adjusted radio signal (analog signal) to the baseband processing unit 103. The wireless transceiver 102 adjusts the amplitude of the analog signal output from the baseband processing unit 103 and transmits the adjusted analog signal via the antenna 101.

  The baseband processing unit 103 demodulates the analog signal output from the wireless transceiver 102 into a digital signal according to a preset modulation method (for example, QPSK (Quadrature Phase Shift Keying) method). The baseband processing unit 103 outputs this digital signal to the wireless LAN control unit 104.

  In addition, the baseband processing unit 103 modulates the digital signal output from the wireless LAN control unit 104 into an analog signal according to the modulation method. The baseband processing unit 103 outputs this analog signal to the wireless transceiver 102.

  The wireless LAN control unit 104 executes control for performing wireless communication including establishment of a connection with the terminal device 20, transmission of a notification signal (beacon), transmission / reception of data, and the like. More detailed functions of the wireless LAN control unit 104 will be described later.

  The memory 105 temporarily holds (stores) information for the wireless LAN control unit 104 to execute the above control. In addition, the memory 105 holds data destined for individual terminals described later.

The system control unit 11 controls the entire base station apparatus 10. The system control unit 11 performs processing for transmitting (bridging) the data received by the wired LAN communication unit 12 to the wireless LAN communication unit 100 and supplying power to each part of the base station device 10. A process for controlling is executed.
The wired LAN communication unit 12 performs communication with other devices (external devices) connected via the communication line NW.

(function)
FIG. 4 is a block diagram showing functions according to the present invention among the functions of the wireless communication system 1 configured as described above.

The functions of the wireless LAN communication unit 100 included in the base station device 10 are: an individual terminal address data holding unit (individual terminal address data holding unit) 111, a notification signal transmission unit (notification signal transmission unit) 112, and an individual terminal address data transmission Unit (data transmission means for individual terminals) 113, a control section (control means) 114, and a data transmission section for all terminals (data transmission means for all terminals) 115.
The function of the terminal device 20 includes a control signal transmission unit (control signal transmission means) 21.

  The individual terminal address data holding unit 111, when the base station apparatus 10 receives the individual terminal address data set as the transmission destination by the terminal device 20 operating in the power save mode, the received individual terminal address data Is held (stored in the memory 105). For example, the data addressed to the individual terminal is a frame or a packet. In this example, the individual terminal addressed data is data received from an external device via the wired LAN communication unit 12.

  The individual terminal address data holding unit 111 deletes the individual terminal address data from the memory 105 when the retained individual terminal address data is transmitted by the individual terminal address data transmission unit 113 (holding of the individual terminal address data Exit).

  The notification signal transmission unit 112 transmits a notification signal (beacon) to each of the plurality of terminal devices 20,... Every time the notification signal transmission interval INT1 elapses (at time PB in FIG. 3). In addition, the notification signal transmission part 112 may be comprised so that a notification signal may be transmitted only to the terminal device 20 ... which operate | moves in a power save mode.

  At this time, when the individual terminal-addressed data holding unit 111 holds the individual terminal-addressed data, the notification signal transmission unit 112 includes a notification signal including transmission schedule information indicating that the individual terminal-addressed data is scheduled to be transmitted. Send. In the present example, the transmission schedule information is also called a traffic communication map (TIM: Traffic Indication Map).

  Furthermore, when the control unit 114 sets the state of the base station apparatus 10 to the standby state after the transmission of the notification signal, the notification signal transmission unit 112 includes a notification signal including standby schedule information indicating that fact. Send.

  The control signal transmission unit 21 receives a notification signal from the base station device 10. When the received notification signal includes transmission schedule information, the control signal transmission unit 21 transmits a control signal (PS-Poll) indicating that transmission of data addressed to the individual terminal is requested to the base station apparatus 10.

  The individual terminal addressed data transmission unit 113 receives the control signal transmitted by the terminal device 20 in response to the notification signal including the transmission schedule information. When the control signal is received, the individual terminal-addressed data transmission unit 113 receives the destination device 20 that has transmitted the control signal from the individual terminal-addressed data held by the individual terminal-addressed data holding unit 111. The data addressed to the individual terminal set as is transmitted to the terminal device 20.

  The control unit 114 allows at least one of the terminal devices 20,... Capable of wireless communication with the base station device 10 (that is, a wireless communication connection with the base station device 10 is established) in the active mode ( That is, when operating in a mode other than the power save mode), the state of the base station apparatus 10 is always set to the normal state (Awake).

  The normal state is a state in which wireless communication with the terminal devices 20,. In this example, the base station apparatus 10 changes the state of the base station apparatus 10 to the normal state by supplying power to all the parts constituting the base station apparatus 10 including the wireless transceiver 102 and the baseband processing unit 103. Set.

  On the other hand, the control unit 114 saves power of all the terminal devices 20,... Capable of wireless communication with the base station device 10 (that is, connection established by wireless communication with the base station device 10). When operating in the mode, the state of the base station apparatus 10 is set to a standby state (Sleep) in a first standby period TS1 and a second standby period TS2, which will be described later.

  The standby state is a state where wireless communication with the terminal devices 20,. In this example, the base station apparatus 10 sets the state of the base station apparatus 10 to a standby state by stopping the supply of power to the radio transceiver 102 and the baseband processing unit 103.

  When all of the terminal devices 20,... Capable of wireless communication with the base station device 10 are operating in the power save mode, the control unit 114 performs the first standby period TS1 and the second standby period. In all periods other than TS2, the state of the base station apparatus 10 is set to the normal state.

  The first standby period TS1 is a period from when a notification signal (first notification signal) is transmitted to when a notification signal (second notification signal subsequent to the first notification signal) is transmitted next. The period other than the data transmission period TA addressed to all terminals and the period when the individual terminal address data holding unit 111 does not hold the individual terminal address data at the time when the first notification signal is transmitted (see FIG. 3 period TS1).

  That is, when all of the terminal devices 20,... Capable of wireless communication with the base station device 10 are operating in the power save mode, the control unit 114 causes the individual terminal address data holding unit 111 to When the data is not held, it can be said that the state of the base station apparatus 10 in the period from the transmission of the broadcast signal to the next transmission of the broadcast signal is set to the standby state.

  The second standby period TS2 is a period from when the notification signal (first notification signal) is transmitted to when the notification signal (second notification signal subsequent to the first notification signal) is transmitted next. Are all periods other than the data transmission period TA addressed to all terminals, and all of the terminal devices 20,... Capable of wireless communication with the base station device 10 when the first broadcast signal is transmitted. This is a period during which the state is set to the standby state (period TS2 in FIG. 3).

  That is, when all of the terminal devices 20,... Capable of wireless communication with the base station device 10 are operating in the power save mode, the control unit 114 causes the individual terminal address data holding unit 111 to Even when the data is held, all the states of the terminal devices 20,... Are set to the standby state in the period from when the notification signal is transmitted until the next notification signal is transmitted. It can be said that the state of the base station apparatus 10 in the period is set to the standby state.

  Moreover, it can be said that the control part 114 sets the state of the base station apparatus 10 to a normal state in the data transmission period TA addressed to all terminals.

  All the terminal-addressed data transmission units 115 are all capable of wireless communication with the base station apparatus 10 (that is, all of the terminal apparatuses 20,... That are established with the base station apparatus 10 through wireless communication). Data destined for all terminals set as a transmission destination (for example, a broadcast frame or a multicast frame) is transmitted in the data transmission period TA destined for all terminals. In this example, the data addressed to all terminals is data generated by the wireless LAN control unit 104 or data received from an external device via the wired LAN communication unit 12.

  That is, it can be said that the data transmission unit 115 for all terminals transmits the data for all terminals in the data transmission period TA for all terminals every time the data transmission interval INT2 for all terminals elapses.

(Operation)
Next, the operation of the above-described wireless communication system 1 will be described.
The base station apparatus 10 sets the state of the base station apparatus 10 to the normal state every time the broadcast signal transmission interval INT1 elapses (at time PB in FIG. 3). Next, the base station apparatus 10 performs the process shown by the flowchart in FIG. 5 in order to transmit the notification signal.

  Specifically, when starting this process, the base station device 10 is capable of wireless communication with the base station device 10 (that is, a connection by wireless communication is established with the base station device 10). ) It is determined whether or not all of the terminal devices 20,... Are operating in the power saving mode (in operation) (step S101).

  When each terminal device 20,... Sets its own state to a standby state, each terminal device 20,... Transmits standby shift information indicating that fact to the base station device 10. In this example, the standby shift information is a power management bit in the frame control field of the transmission frame.

  First, all of the terminal devices 20,... Capable of wireless communication with the base station device 10 are not operating in the power save mode (that is, at least one terminal device 20 is operating in the active mode). Assume a case.

In this case, the base station apparatus 10 determines “No”, proceeds to step S107, and transmits a notification signal that does not include standby schedule information to each of the terminal apparatuses 20 that can wirelessly communicate with the base station apparatus 10. Send to.
Thereafter, the base station apparatus 10 ends this process.

Next, it is assumed that the current time is time t0 in FIG. 3 and all of the terminal devices 20,... Capable of wireless communication with the base station device 10 are operating in the power save mode.
In this case, the base station apparatus 10 determines “Yes” in step S101 and proceeds to step S102.

  Then, the base station apparatus 10 determines whether or not the current time is the start time of the data transmission period TA for all terminals. In this example, the base station apparatus 10 performs this determination based on information stored in advance indicating the broadcast signal transmission interval INT1 and the data transmission interval INT2 addressed to all terminals.

  This time t0 is the start time of the data transmission period TA for all terminals. Therefore, the base station apparatus 10 determines “Yes” and proceeds to step S107 to transmit a notification signal not including the standby schedule information to each of the terminal apparatuses 20 that can wirelessly communicate with the base station apparatus 10. Send.

In this example, the broadcast signal transmitted by the base station apparatus 10 at this time t0 includes DTIM (Delivery Traffic Indication Message).
Thereafter, the base station apparatus 10 ends this process.

  Then, the base station apparatus 10 transmits all terminal-addressed data to each of the terminal apparatuses 20,... Capable of wireless communication with the base station apparatus 10 in the all-terminal-addressed data transmission period TA.

Next, it is assumed that the current time is time t1 in FIG. 3 and all of the terminal devices 20,... Capable of wireless communication with the base station device 10 are operating in the power save mode.
In this case, the base station apparatus 10 determines “Yes” in step S101 and proceeds to step S102.

  This time t1 is not the start time of the data transmission period TA addressed to all terminals. Accordingly, the base station apparatus 10 determines “No” in step S102, proceeds to step S103, and determines whether or not the data addressed to the individual terminal is held.

  Here, it is assumed that the base station apparatus 10 holds data addressed to individual terminals. In this case, the base station apparatus 10 determines “Yes” in step S103 and proceeds to step S106. Then, the base station device 10 determines whether or not all the states of the terminal devices 20,... Capable of wireless communication with the base station device 10 are in a standby state.

  The base station apparatus 10 receives information indicating the notification signal reception interval INT3 received in advance from each of the terminal apparatuses 20,... Capable of wireless communication with the base station apparatus 10 (in this example, frame information in Probe Request). This determination is made based on

  Here, it is assumed that all the terminal devices 20,... Capable of wireless communication with the base station device 10 are in a standby state. In this case, the base station apparatus 10 determines “Yes” in Step S106 and proceeds to Step S104.

Next, the base station device 10 transmits a notification signal including transmission schedule information and standby schedule information to each of the terminal devices 20,... Capable of wireless communication with the base station device 10. And the base station apparatus 10 sets the state of the base station apparatus 10 to a standby state (step S105).
Thereafter, the base station apparatus 10 ends this process.

Next, it is assumed that the current time is time t3 in FIG. 3 and all of the terminal devices 20,... Capable of wireless communication with the base station device 10 are operating in the power save mode.
In this case, the base station apparatus 10 determines “Yes” in step S101 and proceeds to step S102.

  This time t3 is not the start time of the data transmission period TA for all terminals. Accordingly, the base station apparatus 10 determines “No” in step S102, proceeds to step S103, and determines whether or not the data addressed to the individual terminal is held.

  Here, it is assumed that the base station apparatus 10 holds data addressed to individual terminals. In this case, the base station apparatus 10 determines “Yes” in step S103 and proceeds to step S106. Then, the base station device 10 determines whether or not all the states of the terminal devices 20,... Capable of wireless communication with the base station device 10 are in a standby state.

Here, it is assumed that at least one state of the terminal devices 20,... Capable of wireless communication with the base station device 10 is a normal state. In this case, the base station apparatus 10 determines “No” in step S106, proceeds to step S107, and transmits a notification signal including the transmission schedule information and not including the standby schedule information to the base station apparatus 10. Are transmitted to each of the terminal devices 20,.
Thereafter, the base station apparatus 10 ends this process.

  Then, the terminal device 20 whose state is set to the normal state receives the broadcast signal from the base station device 10. Next, since the received notification signal includes transmission schedule information, the terminal device 20 transmits a control signal (PS-Poll) to the base station device 10.

  On the other hand, the base station apparatus 10 receives a control signal from the terminal apparatus 20. Then, the base station device 10 transmits, to the terminal device 20, the individual terminal-addressed data set as the transmission destination by the terminal device 20 that has transmitted the control signal, among the stored individual terminal-addressed data. .

  Then, the terminal device 20 receives the data addressed to the individual terminal from the base station device 10. Thereafter, the terminal device 20 sets the state of the terminal device 20 to a standby state.

Next, it is assumed that the current time is time t6 in FIG. 3 and all of the terminal devices 20,... Capable of wireless communication with the base station device 10 are operating in the power save mode.
In this case, the base station apparatus 10 determines “Yes” in step S101 and proceeds to step S102.

  This time t3 is not the start time of the data transmission period TA for all terminals. Accordingly, the base station apparatus 10 determines “No” in step S102, proceeds to step S103, and determines whether or not the data addressed to the individual terminal is held.

  Here, it is assumed that the base station apparatus 10 does not hold data addressed to individual terminals. In this case, the base station apparatus 10 determines “No” in step S103 and proceeds to step S104.

Next, the base station apparatus 10 transmits a notification signal that does not include the transmission schedule information and includes the standby schedule information to each of the terminal apparatuses 20 that can wirelessly communicate with the base station apparatus 10. And the base station apparatus 10 sets the state of the base station apparatus 10 to a standby state (step S105).
Thereafter, the base station apparatus 10 ends this process.

  As described above, in the base station device 10 according to the first embodiment of the present invention, all of the terminal devices 20 that can wirelessly communicate with the base station device 10 operate in the power save mode. In the case where the data addressed to the individual terminal is not held, the state of the base station apparatus 10 in the period from the transmission of the broadcast signal to the transmission of the broadcast signal is set to the standby state.

  According to this, it is possible to reduce the amount of power consumed by the base station device 10 without interfering with wireless communication with the terminal devices 20,... Operating in the power save mode.

  Furthermore, the base station apparatus 10 according to the first embodiment of the present invention is configured so that the terminal apparatuses 20 that can perform wireless communication with the base station apparatus 10 are individually operated in the power save mode. Even when the data addressed to the terminal is held, all the states of the terminal devices 20,... Are set to the standby state in the period from when the notification signal is transmitted until the next notification signal is transmitted. The base station apparatus 10 is set to the standby state during the period.

  By the way, when all the states of the terminal devices 20,... Capable of wireless communication with the base station device 10 are set to the standby state, the base station device 10 transmits a notification signal including transmission schedule information. However, the terminal devices 20 do not receive the notification signal. Therefore, by configuring the base station apparatus 10 as described above, the amount of power consumed by the base station apparatus 10 can be further reduced.

  In addition, when the state of the base station device 10 is set to the standby state, the base station device 10 according to the first embodiment of the present invention transmits a notification signal including standby schedule information indicating that to the terminal device 20, Send to…

  According to this, when the state of the base station apparatus 10 is set to the standby state, it can be notified in advance to the terminal apparatuses 20,. As a result, it is possible to avoid the terminal devices 20,... From sending information to the base station device 10 in vain.

Second Embodiment
Next, a base station apparatus according to the second embodiment of the present invention will be described with reference to FIG.
The base station apparatus 500 according to the second embodiment is an apparatus configured to be able to perform wireless communication with at least one terminal apparatus.

Further, the base station device 500 includes:
In the power save mode in which the state of the own device is set in a standby state where wireless communication is not possible in some preset period, and the state of the own device is set in a normal state where wireless communication is possible in other periods An individual terminal-addressed data holding unit (individual terminal-addressed data holding means) 501 for holding the data addressed to the individual terminal set as the transmission destination by the operating terminal device;
Each time a preset notification signal transmission interval elapses, a notification signal including transmission schedule information indicating that the individual terminal addressed data is scheduled to be transmitted when the individual terminal addressed data is held, A notification signal transmission unit (notification signal transmission means) 502 for transmitting to the terminal device;
When receiving a control signal representing a request for transmission of the data addressed to the individual terminal from the terminal device, a data transmission unit for individual terminal (data transmission means for individual terminal data) that transmits the data addressed to the individual terminal to the terminal device 503,
When all of the terminal devices capable of wireless communication with the base station device 500 are operating in the power save mode, when the data addressed to the individual terminal is not held, the notification signal is transmitted. A control unit (control means) 504 for setting a state of the base station device 500 in a period until the next transmission of the notification signal to a standby state incapable of wireless communication with the terminal device;
Is provided.

  According to this, the amount of power consumed by the base station device 500 can be reduced without interfering with wireless communication with the terminal device operating in the power save mode.

  Although the present invention has been described with reference to the above embodiment, the present invention is not limited to the above-described embodiment. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

  In each of the above embodiments, each function of the base station apparatus 10 is realized by hardware such as a circuit. By the way, the base station apparatus 10 includes a processing device and a storage device that stores a program (software), and the processing device may be configured to implement each function by executing the program. Good. In this case, the program may be stored in a computer-readable recording medium. For example, the recording medium is a portable medium such as a flexible disk, an optical disk, a magneto-optical disk, and a semiconductor memory.

  In addition, as another modified example of the above-described embodiment, any combination of the above-described embodiments and modified examples may be employed.

<Appendix>
A part or all of the above embodiment can be described as the following supplementary notes, but is not limited thereto.

(Appendix 1)
A base station device configured to be capable of wireless communication with at least one terminal device,
In the power save mode in which the state of the own device is set in a standby state where wireless communication is not possible in some preset period, and the state of the own device is set in a normal state where wireless communication is possible in other periods Individual terminal address data holding means for holding the data addressed to the individual terminal set as the transmission destination by the operating terminal device;
Each time a preset notification signal transmission interval elapses, a notification signal including transmission schedule information indicating that the individual terminal addressed data is scheduled to be transmitted when the individual terminal addressed data is held, A notification signal transmitting means for transmitting to the terminal device;
When receiving a control signal indicating that transmission of the data destined for the individual terminal is requested from the terminal device, data transmitting means for individual terminal destined to transmit the data destined for the individual terminal to the terminal device;
When all of the terminal devices capable of wireless communication with the base station device are operating in the power save mode, when not holding the data addressed to the individual terminal, the notification signal is transmitted. Control means for setting the state of the base station apparatus in a period until the next notification signal is transmitted to a standby state incapable of wireless communication with the terminal apparatus;
A base station apparatus comprising:

  According to this, the amount of power consumed by the base station device can be reduced without interfering with wireless communication with the terminal device operating in the power save mode.

(Appendix 2)
The base station apparatus according to attachment 1, wherein
The control means is when holding all the data addressed to the individual terminal when all of the terminal devices capable of wireless communication with the base station device are operating in the power save mode. In the period from the transmission of the notification signal to the next transmission of the notification signal, when all the states of the terminal apparatus are set to the standby state, the base station apparatus in the period A base station device configured to set a state to a standby state incapable of wireless communication with the terminal device.

  When all the states of the terminal device capable of wireless communication with the base station device are set to the standby state, even if the base station device transmits a notification signal including transmission schedule information, the terminal device No signal is received. Therefore, by configuring the base station apparatus as described above, the amount of power consumed by the base station apparatus can be further reduced.

(Appendix 3)
A base station apparatus according to appendix 1 or appendix 2,
When the control means sets the state of the base station apparatus to the standby state, the notification signal transmission means transmits the notification signal including standby schedule information indicating that to the terminal apparatus. Configured base station device.

  According to this, when the state of the base station apparatus is set to the standby state, it can be notified to the terminal apparatus in advance. As a result, for example, it is possible to avoid that the terminal device transmits information to the base station device in vain.

(Appendix 4)
A base station apparatus according to any one of appendix 1 to appendix 3,
Every time a data transmission interval addressed to all terminals elapses, which is an integer multiple of the notification signal transmission interval, the data addressed to all terminals set as the transmission destination of all the terminal devices capable of wireless communication with the base station device , Data transmission means addressed to all terminals for transmitting in a data transmission period addressed to all terminals, which is a period from the transmission of the notification signal to the next transmission of the notification signal,
The base station apparatus configured to set the state of the base station apparatus to a normal state capable of wireless communication with the terminal apparatus during the data transmission period for all terminals.

(Appendix 5)
A base station apparatus according to any one of appendix 1 to appendix 4,
Base station device that operates in infrastructure mode.

(Appendix 6)
Applied to a base station device configured to be capable of wireless communication with at least one terminal device;
In the power save mode in which the state of the own device is set in a standby state where wireless communication is not possible in some preset period, and the state of the own device is set in a normal state where wireless communication is possible in other periods The terminal device that operates operates holding data addressed to an individual terminal set as a transmission destination,
Each time a preset notification signal transmission interval elapses, transmission schedule information indicating that the base station apparatus is scheduled to transmit the data destined for the individual terminal when the base station apparatus holds the data destined for the individual terminal. Including a notification signal including the terminal device,
When receiving a control signal indicating that transmission of the data destined for the individual terminal is requested from the terminal device, the data destined for the individual terminal is transmitted to the terminal device,
When all of the terminal devices capable of wireless communication with the base station device are operating in the power save mode, when the base station device does not hold the data addressed to the individual terminal, A base station apparatus control method for setting a state of the base station apparatus during a period from transmission of a broadcast signal to transmission of the broadcast signal to a standby state incapable of wireless communication with the terminal apparatus.

(Appendix 7)
A base station apparatus control method according to appendix 6,
When all of the terminal devices capable of wireless communication with the base station device operate in the power save mode, the base station device holds the data addressed to the individual terminal. However, when all the states of the terminal apparatus are set to the standby state in the period from the transmission of the notification signal to the next transmission of the notification signal, the base station apparatus in the period The base station apparatus control method is configured to set the state of 1 to a standby state incapable of wireless communication with the terminal apparatus.

(Appendix 8)
To a base station device configured to be capable of wireless communication with at least one terminal device,
In the power save mode in which the state of the own device is set in a standby state where wireless communication is not possible in some preset period, and the state of the own device is set in a normal state where wireless communication is possible in other periods The terminal device that operates operates holding data addressed to an individual terminal set as a transmission destination,
Each time a preset notification signal transmission interval elapses, transmission schedule information indicating that the base station apparatus is scheduled to transmit the data destined for the individual terminal when the base station apparatus holds the data destined for the individual terminal. Including a notification signal including the terminal device,
When receiving a control signal indicating that transmission of the data destined for the individual terminal is requested from the terminal device, the data destined for the individual terminal is transmitted to the terminal device,
When all of the terminal devices capable of wireless communication with the base station device are operating in the power save mode, when the base station device does not hold the data addressed to the individual terminal, A base station for executing processing for setting a state of the base station apparatus in a period from when a notification signal is transmitted to when the next notification signal is transmitted to a standby state incapable of wireless communication with the terminal device Device control program.

(Appendix 9)
A base station apparatus control program according to appendix 8,
The processing is as follows:
When all of the terminal devices capable of wireless communication with the base station device operate in the power save mode, the base station device holds the data addressed to the individual terminal. However, when all the states of the terminal apparatus are set to the standby state in the period from the transmission of the notification signal to the next transmission of the notification signal, the base station apparatus in the period The base station apparatus control program is configured to set the state of 1 to a standby state incapable of wireless communication with the terminal apparatus.

(Appendix 10)
A wireless communication system comprising at least one terminal device and a base station device configured to be capable of wireless communication with the terminal device,
The terminal device is set in a standby state in which wireless communication is not possible in a predetermined period, and is set in a normal state in which wireless communication is possible in another period. Configured to operate in power save mode,
The base station device
Individual terminal address data holding means for holding the data addressed to the individual terminal set as a transmission destination by the terminal device operating in the power save mode;
Each time a preset notification signal transmission interval elapses, a notification signal including transmission schedule information indicating that the individual terminal addressed data is scheduled to be transmitted when the individual terminal addressed data is held, A notification signal transmitting means for transmitting to the terminal device;
With
The terminal device further includes:
When receiving the broadcast signal from the base station apparatus, when the broadcast signal includes the transmission schedule information, control for transmitting to the base station apparatus a control signal indicating that transmission of the data addressed to the individual terminal is requested Comprising signal transmission means,
The base station device further includes:
When the control signal is received from the terminal device, individual terminal-addressed data transmission means for transmitting the held individual terminal-addressed data to the terminal device;
When all of the terminal devices capable of wireless communication with the base station device are operating in the power save mode, when not holding the data addressed to the individual terminal, the notification signal is transmitted. Control means for setting the state of the base station apparatus in a period until the next notification signal is transmitted to a standby state incapable of wireless communication with the terminal apparatus;
A wireless communication system comprising:

(Appendix 11)
The wireless communication system according to attachment 10, wherein
The control means is when holding all the data addressed to the individual terminal when all of the terminal devices capable of wireless communication with the base station device are operating in the power save mode. In the period from the transmission of the notification signal to the next transmission of the notification signal, when all the states of the terminal apparatus are set to the standby state, the base station apparatus in the period A wireless communication system configured to set a state to a standby state incapable of wireless communication with the terminal device.

(Appendix 12)
Applied to a wireless communication system comprising at least one terminal device and a base station device configured to be capable of wireless communication with the terminal device;
In the power save mode in which the state of the own device is set in a standby state where wireless communication is not possible in some preset period, and the state of the own device is set in a normal state where wireless communication is possible in other periods The terminal device operates,
The base station device holds the data addressed to the individual terminal set as the transmission destination of the terminal device operating in the power save mode,
Each time a preset notification signal transmission interval elapses, transmission schedule information indicating that the base station apparatus is scheduled to transmit the data destined for the individual terminal when the base station apparatus holds the data destined for the individual terminal. Including a notification signal including the terminal device,
When the terminal device receives the notification signal from the base station device, when the notification signal includes the transmission schedule information, a control signal indicating that transmission of data destined for the individual terminal is requested is transmitted to the base station To the device,
When the base station device receives the control signal from the terminal device, it transmits the held individual terminal addressed data to the terminal device,
When all of the terminal devices capable of wireless communication with the base station device are operating in the power save mode, when the base station device does not hold the data addressed to the individual terminal, A wireless communication control method for setting a state of the base station apparatus in a period from transmission of a broadcast signal to transmission of the broadcast signal next to a standby state incapable of wireless communication with the terminal device.

(Appendix 13)
The wireless communication control method according to attachment 12, wherein
When all of the terminal devices capable of wireless communication with the base station device operate in the power save mode, the base station device holds the data addressed to the individual terminal. However, when all the states of the terminal apparatus are set to the standby state in the period from the transmission of the notification signal to the next transmission of the notification signal, the base station apparatus in the period A wireless communication control method configured to set the state of the wireless communication device to a standby state incapable of wireless communication with the terminal device.

  The present invention is applicable to a base station device configured to be able to perform wireless communication with a terminal device.

DESCRIPTION OF SYMBOLS 1 Wireless communication system 10 Base station apparatus 11 System control part 12 Wired LAN communication part 20, ... Terminal device 21 Control signal transmission part 100 Wireless LAN communication part 101 Antenna 102 Wireless transceiver 103 Baseband process part 104 Wireless LAN control part 105 Memory 111 Individual terminal address data holding unit 112 Notification signal transmission unit 113 Individual terminal address data transmission unit 114 Control unit 115 All terminal address data transmission unit 500 Base station apparatus 501 Individual terminal address data holding unit 502 Notification signal transmission unit 503 Individual terminal address data transmission Unit 504 Control unit NW Communication line

Claims (8)

A base station device configured to be capable of wireless communication with at least one terminal device,
In the power save mode in which the state of the own device is set in a standby state where wireless communication is not possible in some preset period, and the state of the own device is set in a normal state where wireless communication is possible in other periods Individual terminal address data holding means for holding the data addressed to the individual terminal set as the transmission destination by the operating terminal device;
Each time a preset notification signal transmission interval elapses, a notification signal including transmission schedule information indicating that the individual terminal addressed data is scheduled to be transmitted when the individual terminal addressed data is held, A notification signal transmitting means for transmitting to the terminal device;
When receiving a control signal indicating that transmission of the data destined for the individual terminal is requested from the terminal device, data transmitting means for individual terminal destined to transmit the data destined for the individual terminal to the terminal device;
When all of the terminal devices capable of wireless communication with the base station device are operating in the power save mode, when not holding the data addressed to the individual terminal, the notification signal is transmitted. The terminal of the base station apparatus is set to a standby state incapable of wireless communication with the terminal apparatus, and the terminal is capable of wireless communication with the base station apparatus in a period until the next notification signal is transmitted When all of the devices are operating in the power save mode, the notification signal is transmitted and then the notification signal is transmitted even when the data addressed to the individual terminal is held. When all the states of the terminal device are set to the standby state in the period up to, the state of the base station device in the period is changed to the standby state incapable of wireless communication with the terminal device. Set, in the case where all the radio communicable the terminal device between the base station apparatus is operating in the power save mode, other than the period in which the base station apparatus is set in the standby state In all periods, the state of the base station apparatus in the period is set to a normal state in which wireless communication with the terminal apparatus is possible, and at least one of the terminal apparatuses capable of wireless communication with the base station apparatus When one of the terminal devices is operating in an active mode, a control means for setting to a normal state capable of wireless communication with the terminal device ;
A base station apparatus comprising: The base station apparatus according to claim 1,
When the control means sets the state of the base station apparatus to the standby state, the notification signal transmission means transmits the notification signal including standby schedule information indicating that to the terminal apparatus. Configured base station device. The base station apparatus according to claim 1 or 2,
Every time a data transmission interval addressed to all terminals elapses, which is an integer multiple of the notification signal transmission interval, the data addressed to all terminals set as the transmission destination of all the terminal devices capable of wireless communication with the base station device , Data transmission means addressed to all terminals for transmitting in a data transmission period addressed to all terminals, which is a period from the transmission of the notification signal to the next transmission of the notification signal,
The base station apparatus configured to set the state of the base station apparatus to a normal state capable of wireless communication with the terminal apparatus during the data transmission period for all terminals. A base station apparatus according to any one of claims 1 to 3,
Base station device that operates in infrastructure mode. Applied to a base station device configured to be capable of wireless communication with at least one terminal device;
In the power save mode in which the state of the own device is set in a standby state where wireless communication is not possible in some preset period, and the state of the own device is set in a normal state where wireless communication is possible in other periods The terminal device that operates operates holding data addressed to an individual terminal set as a transmission destination,
Each time a preset notification signal transmission interval elapses, transmission schedule information indicating that the base station apparatus is scheduled to transmit the data destined for the individual terminal when the base station apparatus holds the data destined for the individual terminal. Including a notification signal including the terminal device,
When receiving a control signal indicating that transmission of the data destined for the individual terminal is requested from the terminal device, the data destined for the individual terminal is transmitted to the terminal device,
When all of the terminal devices capable of wireless communication with the base station device are operating in the power save mode, when the base station device does not hold the data addressed to the individual terminal, The state of the base station apparatus in the period from the transmission of the broadcast signal to the next transmission of the broadcast signal is set to a standby state incapable of wireless communication with the terminal apparatus, and between the base station apparatus When all of the terminal devices capable of wireless communication are operating in the power save mode, the base station device transmits the notification signal even when the base station device holds the data addressed to the individual terminal. Then, in the period until the next transmission of the notification signal, when all the states of the terminal device are set to the standby state, the state of the base station device in the period, Set serial terminal apparatus and the wireless communication failure standby state, in the case where all the radio communicable the terminal device between the base station apparatus is operating in the power save mode, said base station apparatus In all periods other than the period set in the standby state, the state of the base station apparatus in the period is set to a normal state in which wireless communication with the terminal apparatus is possible, and wireless communication is performed with the base station apparatus. The base station apparatus control method of setting to a normal state in which radio communication with the terminal apparatus is possible when at least one of the terminal apparatuses capable of communication operates in an active mode. To a base station device configured to be capable of wireless communication with at least one terminal device,
In the power save mode in which the state of the own device is set in a standby state where wireless communication is not possible in some preset period, and the state of the own device is set in a normal state where wireless communication is possible in other periods The terminal device that operates operates holding data addressed to an individual terminal set as a transmission destination,
Each time a preset notification signal transmission interval elapses, transmission schedule information indicating that the base station apparatus is scheduled to transmit the data destined for the individual terminal when the base station apparatus holds the data destined for the individual terminal. Including a notification signal including the terminal device,
When receiving a control signal indicating that transmission of the data destined for the individual terminal is requested from the terminal device, the data destined for the individual terminal is transmitted to the terminal device,
When all of the terminal devices capable of wireless communication with the base station device are operating in the power save mode, when the base station device does not hold the data addressed to the individual terminal, The state of the base station apparatus in the period from the transmission of the broadcast signal to the next transmission of the broadcast signal is set to a standby state incapable of wireless communication with the terminal apparatus, and between the base station apparatus When all of the terminal devices capable of wireless communication are operating in the power save mode, the base station device transmits the notification signal even when the base station device holds the data addressed to the individual terminal. Then, in the period until the next transmission of the notification signal, when all the states of the terminal device are set to the standby state, the state of the base station device in the period, Set serial terminal apparatus and the wireless communication failure standby state, in the case where all the radio communicable the terminal device between the base station apparatus is operating in the power save mode, said base station apparatus In all periods other than the period set in the standby state, the state of the base station apparatus in the period is set to a normal state in which wireless communication with the terminal apparatus is possible, and wireless communication is performed with the base station apparatus. When at least one of the terminal devices capable of communication is operating in an active mode, the base station device control program for executing processing is set to a normal state capable of wireless communication with the terminal device . A wireless communication system comprising at least one terminal device and a base station device configured to be capable of wireless communication with the terminal device,
The terminal device is set in a standby state in which wireless communication is not possible in a predetermined period, and is set in a normal state in which wireless communication is possible in another period. Configured to operate in power save mode,
The base station device
Individual terminal address data holding means for holding the data addressed to the individual terminal set as a transmission destination by the terminal device operating in the power save mode;
Each time a preset notification signal transmission interval elapses, a notification signal including transmission schedule information indicating that the individual terminal addressed data is scheduled to be transmitted when the individual terminal addressed data is held, A notification signal transmitting means for transmitting to the terminal device;
With
The terminal device further includes:
When receiving the broadcast signal from the base station apparatus, when the broadcast signal includes the transmission schedule information, control for transmitting to the base station apparatus a control signal indicating that transmission of the data addressed to the individual terminal is requested Comprising signal transmission means,
The base station device further includes:
When the control signal is received from the terminal device, individual terminal-addressed data transmission means for transmitting the held individual terminal-addressed data to the terminal device;
When all of the terminal devices capable of wireless communication with the base station device are operating in the power save mode, when not holding the data addressed to the individual terminal, the notification signal is transmitted. The terminal of the base station apparatus is set to a standby state incapable of wireless communication with the terminal apparatus, and the terminal is capable of wireless communication with the base station apparatus in a period until the next notification signal is transmitted When all of the devices are operating in the power save mode, the notification signal is transmitted and then the notification signal is transmitted even when the data addressed to the individual terminal is held. When all the states of the terminal device are set to the standby state in the period up to, the state of the base station device in the period is changed to the standby state incapable of wireless communication with the terminal device. Set, in the case where all the radio communicable the terminal device between the base station apparatus is operating in the power save mode, other than the period in which the base station apparatus is set in the standby state In all periods, the state of the base station apparatus in the period is set to a normal state in which wireless communication with the terminal apparatus is possible, and at least one of the terminal apparatuses capable of wireless communication with the base station apparatus When one of the terminal devices is operating in an active mode, a control means for setting to a normal state capable of wireless communication with the terminal device ;
A wireless communication system comprising: Applied to a wireless communication system comprising at least one terminal device and a base station device configured to be capable of wireless communication with the terminal device;
In the power save mode in which the state of the own device is set in a standby state where wireless communication is not possible in some preset period, and the state of the own device is set in a normal state where wireless communication is possible in other periods The terminal device operates,
The base station device holds the data addressed to the individual terminal set as the transmission destination of the terminal device operating in the power save mode,
Each time a preset notification signal transmission interval elapses, transmission schedule information indicating that the base station apparatus is scheduled to transmit the data destined for the individual terminal when the base station apparatus holds the data destined for the individual terminal. Including a notification signal including the terminal device,
When the terminal device receives the notification signal from the base station device, when the notification signal includes the transmission schedule information, a control signal indicating that transmission of data destined for the individual terminal is requested is transmitted to the base station To the device,
When the base station device receives the control signal from the terminal device, it transmits the held individual terminal addressed data to the terminal device,
When all of the terminal devices capable of wireless communication with the base station device are operating in the power save mode, when the base station device does not hold the data addressed to the individual terminal, The state of the base station apparatus in the period from the transmission of the broadcast signal to the next transmission of the broadcast signal is set to a standby state incapable of wireless communication with the terminal apparatus, and between the base station apparatus When all of the terminal devices capable of wireless communication are operating in the power save mode, the base station device transmits the notification signal even when the base station device holds the data addressed to the individual terminal. Then, in the period until the next transmission of the notification signal, when all the states of the terminal device are set to the standby state, the state of the base station device in the period, Set serial terminal apparatus and the wireless communication failure standby state, in the case where all the radio communicable the terminal device between the base station apparatus is operating in the power save mode, said base station apparatus In all periods other than the period set in the standby state, the state of the base station apparatus in the period is set to a normal state in which wireless communication with the terminal apparatus is possible, and wireless communication is performed with the base station apparatus. A wireless communication control method for setting a normal state in which wireless communication with the terminal device is possible when at least one of the terminal devices capable of communication is operating in an active mode.

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