JP2002280925A - Radio communication device, storage medium and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio communication device that is a component of a wireless communication system, receives power from an AC adaptor or a battery, and is operation in a master mode or a slave mode, and can be operated for a time longer than that of the conventional systems in the overall radio communication system without increasing the capacity of the battery supplying power to the radio communication device and to provide a storage medium and a program. SOLUTION: The radio communication device making radio data communication, receiving power supply from an AC adaptor or a battery and in operation, detects from which of the AC adaptor and the battery the power is supplied, selects the master mode or the slave mode and is in operation, according to the selected operation mode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication device capable of reducing power consumption, and more particularly to a radio communication device used for a mobile terminal device constituting a network.

[0002]

2. Description of the Related Art Conventionally, a radio communication system for performing data communication between a plurality of terminals having a radio communication function has been known.

[0003] These terminals are IrDA (inf)
In the case of a terminal having a wireless communication function that conforms to standards such as a raid data association and a Bluetooth (Bluetooth), in order to enhance the portability of these terminals, a user needs to use an AC power adapter or a portable battery. Can be selectively used for the terminal.

[0004] When wireless data communication is performed between the terminals by receiving power supply from a battery, it is necessary to reduce the power consumption of each terminal so that the terminals can be used for a long time. .

[0005] A method for reducing the power consumption of the terminal is described in, for example, JP-A-6-132968. This method is a method of reducing power consumption of a slave device by controlling a power supply of the slave device using a reception control signal between a host (master) device and a slave device.

Japanese Patent Laid-Open Publication No. Hei 8-265178 discloses a communication apparatus having a means for determining the type of power supply and a means for adjusting transmission power in accordance with the reception level of a control signal. For example, a method of increasing the transmission output and, in the case of a battery, reducing the transmission output to reduce the power consumption when the battery is used and extend the usable time of the battery attached to the communication device. It has been disclosed.

[0007]

By the way, in order to synchronize communication, a master device operating in a master mode, which is a mode in which transmission / reception is started after transmitting a command message to a communication partner, is performed. In order to achieve synchronization, in a communication system configured with a slave device operating in a slave mode that is a mode of starting transmission and reception after receiving a command message from a communication partner, the power consumption of the slave device is: Less power consumption than the master device.

In the above-described method of changing the transmission output of the slave device or controlling the power of the slave device, the power consumption of the slave device can be reduced, but the power consumption of the master device is reduced. Therefore, power consumption of the master device cannot be reduced.

Further, unlike the recent Bluetooth, the master device and the slave device are not fixed, the master device and the slave device are dynamically switched, and the master device is also mobile (providing portability). If the device corresponding to the master device is driven by a battery in a situation where the device can be driven by a battery, the device corresponding to the master device transfers power charged to the battery to another device. There is a problem that the device is used up more quickly than the slave device, the device corresponding to the master device stops operating, and the entire wireless communication system cannot be used.

[0010] When the capacity of the battery is increased, each of the above terminals becomes large and the portability is impaired.

The present invention constitutes a wireless communication system,
In a wireless communication device that receives power supply from a C adapter or a battery and operates in one of a master mode and a slave mode, without increasing the capacity of a battery that supplies power to the wireless communication device,
It is an object of the present invention to provide a wireless communication device, a storage medium, and a program that can operate the entire wireless communication system for a longer time than before.

[0012]

SUMMARY OF THE INVENTION The present invention relates to a wireless communication apparatus which performs data communication wirelessly and operates by receiving power supply from an AC adapter or a battery.
It detects whether power is being supplied from the adapter or the battery, and selects one of a master mode and a slave mode according to the detection result. Is what works.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] FIG. 1 is a diagram showing a configuration of a data communication system 100 according to a first embodiment of the present invention.

Data communication system (wireless communication system)
100 is a portable computer 101 which is a terminal
a, 101b, a mobile printer 102, and a digital camera 103.

Here, the portable computer 101
Reference numerals a and 101b denote portable computers (PCs) that can operate by being supplied with power from the AC adapter 105 or a rechargeable battery (battery). Note that AC
The adapter 105 is supplied with power from an AC power outlet 104. In addition, the mobile printer 102
Is a printer that operates by being supplied with power from an AC adapter or a rechargeable battery, like the portable computer.

Also, the portable computer 101a,
The wireless communication function unit (wireless communication device) 10b includes the wireless printer 101b, the mobile printer 102, and the digital camera 103.
6, 107, 108, and 109, respectively, and the terminals can perform wireless communication with each other by using these wireless communication function units.

Note that, in the data communication system 100, there is an area 110 where wireless communication is possible, and if the above-mentioned terminals exist in this area, the above-mentioned terminals can perform wireless communication with each other.

FIG. 2 is a block diagram showing the configuration of the wireless communication function unit 106.

The wireless communication function unit 106, the wireless communication function unit 107, the wireless communication function unit 108, and the wireless communication function unit 1
09 has the same configuration, so the configuration of the wireless communication function unit 106 will be described here.

The wireless communication function unit 106 includes a communication unit 201, a control unit 210, a storage unit 220, and a power supply determination unit 230. In addition, the wireless communication function unit 106 can receive power supply from an AC adapter or a rechargeable battery.

The communication unit 201 includes a receiving unit 202 and a transmitting unit 2
03, timer control unit 204, and low power consumption mode control unit 2
05.

Here, the transmission unit 203 transmits an inquiry request signal used for detecting a terminal which is a wireless communication partner, transmission data to be transmitted to the terminal, and the like to the control unit 21.
It transmits based on the instruction of 0. Further, when the receiving unit 202 receives an inquiry request signal transmitted from another terminal at the standby frequency, the transmitting unit 203 transmits a response signal to the other terminal.

The receiving section 202 receives, from the terminal, a response signal or communication data to the inquiry request signal transmitted to the terminal.

The control section 210 includes a low power consumption mode shift request section 211, a master / slave conversion section 212, a master / slave selection section 213, and a power supply detection section 214.

The control section 210 reads a control program stored in a program storage section 221 provided in the storage section 220, and controls each of the above-described functional sections according to the read control program.

Here, the control program performs data communication wirelessly, and receives power from either the AC adapter or the battery in the wireless communication function unit 106 that operates by receiving power from the AC adapter or the battery. Is detected by the power supply detection unit 214 via the power supply determination unit 230, and the master / slave exchange unit 213 selects either the master mode or the slave mode according to the detection result. This is a program that is controlled by the master / slave conversion unit 212 so that the wireless communication function unit 106 operates according to the operation mode thus set.

For example, in the above control program,
When the power detection unit 214 detects that power is being supplied from the AC adapter, the power supply detection unit 214 selects the master mode, and determines the wireless communication function unit 1 according to the selected operation mode.
06 operates, and when the power supply detecting unit 214 detects that power is being supplied from the battery, the slave mode is selected, and the wireless communication function unit 106 operates according to the selected operation mode.

Here, in the master mode, in order to synchronize communication with a communication partner, a command message is transmitted to the communication partner and then data transmission / reception with the communication partner starts. Mode.

In the slave mode, a communication system is established when communication is not performed in order to synchronize communication with a communication partner, and a command message is received from the communication partner operating in the master mode. This is a mode in which transmission and reception of data with the communication partner are started afterwards.

The master / slave storage unit 222
Is a storage area for temporarily storing whether the current mode of the wireless communication function unit 106 is the master mode or the slave mode.

The power discriminating section 230 is provided with the radio communication function section 10.
6 determines whether power is supplied from the AC adapter or the rechargeable battery via the signal line 231, and notifies the power detection unit 214 provided in the control unit 201 of the determination result.

Next, the operation of the wireless communication control unit 106 will be described.

The wireless communication function unit 106, the wireless communication function unit 107, the wireless communication function unit 108, and the wireless communication function unit 1
09 operates in the same manner, and the operation of the wireless communication function unit 106 will be described here.

FIG. 3 is a flowchart showing the basic operation of the wireless communication function unit 106.

The wireless communication control unit 106 provided in the portable computer 101a includes the wireless communication function unit 10
6 detects whether power is being supplied from the AC adapter or the rechargeable battery (S301).

If power is being supplied from the rechargeable battery (S301), it is determined whether or not it is operating in the slave mode (S302). If it is not operating in the slave mode, it is operated in the slave mode. Set to (S
304).

On the other hand, when power is being supplied from the AC adapter (S301), it is determined whether or not operation is in the master mode (S303). When operation is not in the master mode, operation is in the master mode. (S305).

After setting to operate in the slave mode in step S304, or setting to operate in the master mode in step S305,
The operation mode is changed (S306). The procedure for changing the operation mode is, as described later, the wireless communication function unit 1.
06 differs depending on whether it is being connected to another wireless communication function unit or not.

Next, it is determined whether or not the change of the operation mode is completed (S307). If the change of the operation mode is completed, the operation is terminated.

By the above operation, the wireless communication function unit 10
The operation mode 6 corresponds to the type of the power supply. That is, when power is supplied from the AC adapter, the device operates in a master mode that consumes a large amount of power. When power is supplied from a rechargeable battery, the device operates in a slave mode that consumes a small amount of power.

Next, the operation of switching between the master mode and the slave mode when the wireless communication function unit 106 is not connected to another wireless communication function unit will be described.

FIG. 4 is a flowchart showing an operation of switching between the master mode and the slave mode when the wireless communication function unit 106 is not connected to another wireless communication function unit.

The wireless communication function unit 106 detects whether the wireless communication function unit 106 is supplied with power from an AC adapter or a rechargeable battery (S401).

If power is being supplied from the AC adapter (S401), a master mode transition process is performed (S402). That is, an inquiry request signal is transmitted to each peripheral slave device (a terminal such as the portable computer 101b) (S403), and an inquiry response signal is received from each slave device (S40).
4), the transition to the master mode is completed (S40)
5).

On the other hand, when power is being supplied from the rechargeable battery (S401), a slave mode transition process is performed (S406). That is, the mode shifts to a mode in which an inquiry request signal transmitted from another terminal (a terminal such as the portable computer 101b) can be received (S407).

Subsequently, it is determined whether or not an inquiry request signal transmitted from a master device (a device operating in the master mode among the other terminals) has been received (S408). Is received, a response signal is transmitted to the master device (S409), and the transition to the slave mode is completed (S410).

Next, the operation of switching between the master mode and the slave mode when the wireless communication function unit is connected to another wireless communication function unit will be described.

FIG. 5 shows the operation of switching between the master mode and the slave mode when the wireless communication function unit is connected to another wireless communication function unit and receiving a print request from the portable computers 101a and 101b. 6 is a sequence chart showing the operation of the mobile printer 102 in FIG.

First, the mobile printer 102 receives power supply from the AC adapter and
The wireless communication function unit 108 provided in the portable computer 10 operates in the master mode (S501).
In 1a, the rechargeable battery is being charged, the wireless communication function unit 106 provided in the portable computer 101a operates in the slave mode (S502), and the mobile printer 102 and the portable computer 101a communicate with the wireless communication function units 106 and 108. (S503).

Next, when the AC adapter connected to the mobile printer 102 is disconnected, the control unit 210 detects that power is being supplied from the rechargeable battery (S5).
04).

At this time, the wireless communication function unit 108 operating in the master mode transmits a master / slave exchange request command to the wireless communication function unit 106 operating in the slave mode. The roles of the master and the slave are exchanged with the wireless communication function unit 108 (S505). That is, the wireless communication function unit 10
8 operates in the slave mode, and the wireless communication function unit 106 operates in the master mode.

When the wireless communication function unit 108 shifts to the slave mode, transmission and reception of packet data between the wireless communication function unit 106 and the wireless communication function unit 108 are interrupted for a predetermined fixed time.

After the role exchange between the master and the slave is completed, the wireless communication function unit 108 provided in the mobile printer 102 shifts to the slave mode (S50).
6) The wireless communication function unit 106 provided in the portable computer 101a shifts to the master mode (S507), continues the connection between the wireless communication function unit 106 and the wireless communication function unit 108, and transmits and receives data. (S5
08).

Next, when the wireless communication function unit 106 provided in the portable computer 101a is operating in the master mode with large power consumption and wants to shift to a further low power consumption mode, the mobile printer 102 When the transmission data for printing to be transmitted becomes empty (S509), the wireless communication function unit 106 transmits a low power consumption operation shift request signal called a hold mode to the wireless communication function unit 108 operating in the slave mode. It transmits (S510).

If the print transmission data to be transmitted from the portable computer 101a to the mobile printer 102 is empty and does not exist (S509), the wireless communication function unit 106 and the wireless communication function unit 108 for a predetermined period of time.
The transmission and reception of packet data between and are interrupted.

Next, the portable computer 1 having the wireless communication function unit 107 operating in the master mode
01b, when a print request is newly generated (S5
11), the wireless communication function unit 107 sends a connection request signal to the wireless communication function unit 108 operating in the slave mode (S512), and after confirming that the connection with the wireless communication function unit 108 has been established, (S513), the transmission data for printing is transmitted to the wireless communication function unit 108 (S514).

After the transmission of the transmission data for printing is completed, the wireless communication function unit 107 provided in the portable computer 101b operates the mobile printer 1
In step S516, a disconnection request signal is transmitted to the wireless communication function unit provided in the wireless communication function unit 02, and a disconnection confirmation signal is received from the wireless communication function unit.

Thereafter, the wireless communication function unit 108 sends a hold mode end instruction signal to the wireless communication function unit 106 (S517), and resumes the connection between the mobile printer 102 and the portable computer 101a (S5).
18).

With the above operation, the mobile printer 1
02 can operate to receive a print request from the portable computer 101b even when operating in the slave mode, which is a low power consumption mode. The connection between the portable computer 101a and the portable computer 101a can be resumed.

According to the above-described embodiment, the data communication is performed wirelessly, and the wireless communication function unit 106, which operates by receiving power supply from the AC adapter or the battery, operates as follows.
It detects whether power is supplied from the C adapter or the battery, and selects one of the master mode and the slave mode according to the result of the detection, and operates according to the selected operation mode. ,
The wireless communication function unit 106 can be operated for a longer time than before without increasing the capacity of a battery that supplies power to the wireless communication function unit 106.

[Second Embodiment] Next, a second embodiment of the present invention will be described.

The second embodiment is different from the first embodiment in that
After the wireless communication function unit 108 provided in the mobal printer 102 shifts from the master mode to the slave mode, the wireless communication function unit 106 provided in the portable computer 101a shifts from the slave mode to the master mode. This is an example in which data communication is performed between the function unit 106 and the wireless communication function unit 108.

FIG. 6 is a sequence chart showing the operation of the wireless communication function unit 108 provided in the mobile printer 102 and the wireless communication function unit 106 provided in the portable computer 101a.

The wireless communication function unit 108 provided in the mobile printer 102 operates in the master mode upon receiving power supply from the AC adapter (S601), and the wireless communication function unit 106 provided in the portable computer 101a. Is operating in slave mode.

Next, the wireless communication function unit 108 transmits an inquiry request signal to the wireless communication function unit 106 (S60).
2) In response, the wireless communication function unit 108 receives the inquiry response signal transmitted by the wireless communication function unit 106 (S603).

Next, when the wireless communication function unit 108 detects that power is being supplied from the rechargeable battery (S60).
4), the wireless communication function unit 108 changes the operation mode to the slave mode (S605).

As a result of the change in the operation mode, synchronization between the wireless communication function unit 108 and the wireless communication function unit 106 operating in the slave mode is lost (S607).

Subsequently, the portable computer 101a
Transmits a connection request signal to the wireless communication function unit 108 provided in the mobile printer 102 (S608). If the connection based on this transmission fails (S609), the wireless communication function unit 1
06 transmits an inquiry request signal to the wireless communication function unit 108 (S610).
8 transmits the inquiry response signal transmitted by the wireless communication function unit 1
06 is received (S611).

Next, the wireless communication function unit 106 shifts to the master mode (S612), transmits a connection request signal to the wireless communication function unit 108 operating in the slave mode (S613), and sends a connection confirmation signal. After receiving from the wireless communication function unit 108 (S614), data communication is performed with the wireless communication function unit 108a (S615).

In the above embodiment, the wireless communication function unit 1
06, the wireless communication function unit 108 autonomously changes the role of the master / slave, but before changing the role, the two devices are connected once and notify each other that the role is changed. It may be.

In this embodiment, when two wireless communication devices that perform wireless communication with each other shift to the slave mode, one of the two wireless communication devices automatically shifts to the master mode and wirelessly shifts to the master mode. Since communication is performed,
Data communication can be performed without reducing the power consumption of the above two devices and without imposing a burden on the user (without switching the master / slave by the user).

[Third Embodiment] Next, a third embodiment of the present invention will be described.

The third embodiment is different from the first embodiment in that
The wireless communication function unit 108 provided in the mobile printer 102 and the wireless communication function unit 107 provided in the portable computer 101b operate in the slave mode, and the wireless communication function unit 106 provided in the portable computer 101a operates in the slave mode. When operating in the master mode, via the portable computer 101a,
This is an example in which the portable computer 101b transmits print data to the mobile printer 102.

FIG. 7 shows a wireless communication function unit 108 provided in the mobile printer 102 and a wireless communication function unit 106 provided in the portable computer 101a.
4 is a sequence chart showing the operation of the wireless communication function unit 107 provided in the portable computer 101b.

The wireless communication function unit 108 provided in the mobile printer 102 and the portable computer 10
1b operates in a slave mode by receiving power from a rechargeable battery (S
701, S702, S704, S705), it is assumed that the wireless communication function unit 106 provided in the portable computer 101a operates in the master mode by receiving power supply from the AC adapter (S703, S70).
6).

The wireless communication function unit 106 provided in the portable computer 101a transmits an inquiry request signal to the wireless communication function unit 10 operating in the slave mode.
7 and the wireless communication function unit 108 (S707, S707
708).

Subsequently, as a response to the inquiry request signal, the wireless communication function unit 107 and the wireless communication function unit 1
08 sends the inquiry response signal to the wireless communication function unit 106.
(S709, S710).

The portable computer 101a having the wireless communication function unit 107 operating in the master mode has a service function as a gateway.
It is assumed that the portable computer 101b has acquired information indicating that the portable computer 101a has the service function. Then, it is assumed that the portable computer 101b has means for registering the acquired information in a database, and the information has already been registered.

By obtaining information indicating that the portable computer 101 has the service function, the portable computer 101
b can know that the portable computer 101a is connected to the mobile printer 102b.

Next, when a print request is issued in the portable computer 101b, the wireless communication function unit 107 provided in the portable computer 101b
A connection request signal is transmitted to the wireless communication function unit 106 provided in the portable computer 101a (S71).
1), the wireless communication function unit 106 transmits a connection response signal corresponding to the connection request signal to the wireless communication function unit 107 (S712).

Then, the portable computer 101a
The wireless communication function unit 106 provided in the portable computer 101b is connected to the wireless communication function unit 107 provided in the portable computer 101b.
01b spools the print data to the portable computer 101a (Spool). After the spooling of the print data is completed (S714), the wireless communication function unit 106
Transmits a connection request signal to the wireless communication function unit 108 (S
715).

Upon receiving the connection confirmation response signal from the wireless communication function unit 106, the wireless communication function unit 108 connects the wireless communication function unit 106 and the wireless communication function unit 108 (S7).
16, S717), sends the spooled print data to the mobile printer 102,
2 performs printing (S718).

When the printing is completed, the wireless communication function unit 108 provided in the mobile printer 102
Transmits a connection request signal to the wireless communication function unit 107 provided in the portable computer 101b (S7).
19), when the wireless communication function unit 108 receives a connection response signal corresponding to the transmitted connection request signal (S7).
20), the communication function unit 107 and the wireless communication function unit 108 are connected to each other, and the mobile printer 102 transmits a print completion notification signal to the portable computer 101b (S721).

According to the present embodiment, when the wireless communication function unit 107 provided in the portable computer 101b operates in the slave mode, the portable computer 101b operates in the wireless communication function unit 106 operating in the master mode. Portable computer 10 equipped with
1a via the mobile printer 10
2 and the mobile printer 102 receives and prints the print data.
01b is a portable computer 101b.
However, the user can print the data he or she wants to print without having to be aware of whether it is operating in the master mode or the slave mode.

Further, even if the communication system 100 includes both the wireless communication function unit operating in the master mode and the wireless communication function unit operating in the slave mode, the communication device 100 operates through the device operating in the master mode. Data can be transmitted and received between devices operating in the slave mode.

Each of the above embodiments can be understood as a storage medium and a computer program. In each of the above embodiments, the wireless communication device 106 operates by supplying the program or the program stored in the recording medium to the wireless communication device 106.

That is, after the supplied program (program code) is stored in a memory provided in a function expansion board of a computer provided in the wireless communication device 106 or a function expansion unit connected to the computer,
Based on the instructions of the stored program, a CPU provided in the function expansion board or the function expansion unit is provided.
Perform part or all of the actual processing, and the functions described in the above embodiments are realized by this processing.

Each of the above embodiments is a control procedure of a wireless communication apparatus which performs data communication wirelessly and operates by receiving power supply from an AC adapter or a battery, wherein power is supplied from either the AC adapter or the battery. A power supply source detection procedure for detecting whether the power supply has been received, and one of the operation modes of the master mode and the slave mode is selected according to a result detected in the power supply source detection procedure. It is an example of a program that causes a computer to execute an operation control procedure for controlling a wireless communication device to operate, and an example of a computer-readable storage medium that stores the program.

In this case, in the operation control procedure, the master mode is selected when it is detected in the power supply source detection procedure that power is being supplied from the AC adapter. This is a procedure for selecting the slave mode when it is detected that the power is being supplied.

Further, in the operation control procedure, even when the wireless communication apparatus is connected to a wireless communication apparatus other than the wireless communication apparatus, either one of the master mode and the slave mode is selected, and This is a procedure for controlling the wireless communication device to operate according to the selected operation mode.

The operation control procedure is a procedure in which when the wireless communication device operates in the slave mode, the wireless communication device suspends transmission / reception of packet data for a predetermined fixed time.

[0092] Further, the operation control procedure includes resuming the data transmission / reception after suspending the transmission / reception of the packet data for a predetermined period of time. When there is no data to be transmitted / received to / from the wireless communication device, the wireless communication device suspends transmission / reception of packet data for a predetermined period of time.

Note that FD, CD,
DVDs, HDs, semiconductor memories, and the like can be considered.

[0094]

According to the present invention, in a radio communication apparatus which constitutes a radio communication system, receives power from an AC adapter or a battery, and operates in one of a master mode and a slave mode, The whole wireless communication system can be operated for a longer time than before without increasing the capacity of a battery that supplies power to the wireless communication device.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a data communication system 100 according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a wireless communication function unit 106.

FIG. 3 is a flowchart showing a basic operation of the wireless communication function unit 106.

FIG. 4 is a diagram showing a case where a wireless communication function unit is not connected.
5 is a flowchart illustrating an operation in which the wireless communication function unit switches between a master mode and a slave mode.

FIG. 5 is a diagram illustrating an operation of switching between the master mode and the slave mode when the wireless communication function unit is connected to another wireless communication function unit and the portable computers 101a and 101a.
9 is a sequence chart showing an operation of the mobile printer 102 when receiving a print request from the mobile printer 102.

FIG. 6 shows a wireless communication function unit provided in the mobile printer 102 and a portable computer 101a.
6 is a sequence chart showing an operation with the wireless communication function unit 106 provided in the communication system.

FIG. 7 shows a wireless communication function unit provided in the mobile printer 102 and a portable computer 101a.
7 is a sequence chart showing operations of a wireless communication function unit 106 provided in the portable computer 101b and a wireless communication function unit 107 provided in the portable computer 101b.

[Explanation of symbols]

 100: Data communication system, 101a, 101b: Portable computer, 102: Mobile printer, 105: AC adapter, 106, 107, 108, 109: Wireless communication function unit, 210: Control unit, 212: Master / slave conversion unit, 213 ... Master / slave selection means 214 power detection means 221 control program storage section 230 power determination section

Claims (15)

[Claims] 1. A wireless communication device that performs data communication wirelessly and operates by receiving power supply from an AC adapter or a battery. A power supply source that detects which of the AC adapter and the battery is receiving power. Detecting means; selecting one of an operation mode of a master mode and a slave mode according to a result detected by the power supply source detecting means, and controlling the wireless communication apparatus to operate according to the selected operation mode. And a control means for performing the control. 2. The power supply control device according to claim 1, wherein the control unit detects that the power supply source detection unit includes the AC power supply detection unit.
The master mode is selected when it is detected that power is being supplied from the adapter, and the slave mode is selected when it is detected that power is being supplied from the battery. Wireless communication device. 3. The wireless communication device according to claim 1, wherein the control unit is configured to perform one of a master mode and a slave mode even when the wireless communication device is connected to a wireless communication device other than the wireless communication device. A wireless communication device for controlling the wireless communication device to operate according to the selected operation mode. 4. The wireless communication device according to claim 1, wherein, when the wireless communication device is operating in a slave mode, the wireless communication device operates for a predetermined period of time. A wireless communication device for interrupting transmission and reception of packet data. 5. The wireless communication device according to claim 4, wherein after the transmission / reception of the packet data is interrupted for a predetermined period of time, the transmission / reception of the data is restarted. When there is no data to be transmitted / received to / from the communication device, the wireless communication device suspends transmission / reception of packet data for a predetermined period of time. 6. A control procedure for a wireless communication device that performs data communication wirelessly and operates by receiving power supply from an AC adapter or a battery, and determines which of the AC adapter and the battery is receiving power supply. A power supply source detection procedure to be detected; and an operation mode of a master mode or a slave mode is selected in accordance with a result detected in the power supply source detection procedure. And a computer-readable storage medium storing a program for causing the wireless communication device to execute an operation control procedure for controlling operation. 7. The operation control procedure according to claim 6, wherein the operation control procedure selects a master mode when the power supply source detection procedure detects that power is being supplied from the AC adapter. A computer-readable storage medium storing a program, which is a procedure for selecting a slave mode when it is detected that power is supplied from a battery. 8. The operation control procedure according to claim 6, wherein the operation control procedure is performed in any one of a master mode and a slave mode even when the wireless communication device is connected to a wireless communication device other than the wireless communication device. A computer-readable storage medium storing a program, wherein the program is a procedure for controlling the wireless communication device to operate in accordance with the selected operation mode. 9. The wireless communication device according to claim 6, wherein in the operation control procedure, when the wireless communication device is operating in a slave mode, the wireless communication device performs a predetermined fixed time. A computer-readable storage medium storing a program for interrupting transmission and reception of packet data. 10. The wireless communication device according to claim 9, wherein after the transmission and reception of the packet data is interrupted for a predetermined fixed time, the transmission and reception of the data are resumed. A computer-readable storage medium storing a program, wherein when there is no data to be transmitted / received to / from a communication device, the wireless communication device suspends transmission / reception of packet data for a predetermined fixed time. 11. Data communication is performed by radio, and AC
A control procedure of a wireless communication apparatus which operates by receiving power supply from an adapter or a battery, the power supply source detecting procedure detecting whether power is supplied from the AC adapter or the battery; An operation control procedure of selecting one of a master mode and a slave mode according to a result detected in the detection procedure, and controlling the wireless communication apparatus to operate according to the selected operation mode; A program to be executed by a wireless communication device. 12. The operation control procedure according to claim 11, wherein the operation control procedure selects a master mode when the power supply source detection procedure detects that power is being supplied from the AC adapter. A program for selecting a slave mode when detecting that power is being supplied from a battery. 13. The operation control procedure according to claim 11, wherein the operation control procedure is performed in any one of a master mode and a slave mode even when the wireless communication apparatus is connected to a wireless communication apparatus other than the wireless communication apparatus. A program for controlling the wireless communication device to operate in accordance with the selected operation mode. 14. The method according to claim 11, wherein
In the above item, in the operation control procedure, when the wireless communication device is operating in the slave mode, the wireless communication device suspends transmission and reception of packet data for a predetermined fixed time. 15. The wireless communication device according to claim 14, wherein after the transmission / reception of the packet data is interrupted for a predetermined period of time, the transmission / reception of the data is restarted. When there is no data to be transmitted / received to / from a communication device, the wireless communication device interrupts transmission / reception of packet data for a predetermined fixed time.