JP2003169133A - Communications device for moving object - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent wireless waiting processing by a CPU from being interrupted in a communications device for a moving object and to surely reset the CPU when the main power source is turned on. <P>SOLUTION: In the communication device for the moving object to be intermittently turned into wireless waiting state even while the main power source of the moving object is turned off, this device has a radio part CPU 101 for performing wireless waiting processing and a control part CPU 201 for resetting the radio part CPU 101 and in a timing for the control part CPU 201 to perform the reset, while the radio part CPU 101 performs wireless waiting processing, a signal under wireless waiting processing is outputted so that the reset can not be performed. Besides, when the main power source is turned on, it is decided by the control part CPU 201 that the signal under wireless waiting processing is not outputted from the radio part CPU 101, and the radio part CPU 101 is reset. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication device, and is suitable for use in telematics.

[0002]

2. Description of the Related Art Some mobile communication devices are required to enter a wireless standby state even when the main power source of the mobile device is off. For example, there is something called telematics. This is to provide various services by utilizing GPS, wireless mobile phone, Internet and the like in an integrated manner. There are various possible applications of this telematics. For example, when a car or ship is stolen, if the stolen car or ship is instructed by a remote to acquire its current position information by GPS and send the information to a server station, The ship can automatically return its position and identify its location.

When it is difficult to find one's own car in a narrow area such as a large parking lot as compared with the above example, a predetermined procedure is performed by contacting the server station with a mobile phone or the like.
The server station commands the car to ring the horn, and the car that receives the command rings the horn, so that the car can be easily found.

Further, when the airbag is deployed, the in-vehicle communication device that senses it automatically sends its position and airbag deployment information to the server station, and the server station receiving the information sends the driver information to the driver. To understand the situation by contacting
In case of an emergency such as an accident, report the accident information to the police or insurance company. As a result, it is possible to quickly deal with trouble such as an accident.

In addition, remote door lock / unlock, car stereo-hands-free phone interlocking, e-mai
Various services such as the l service have been proposed.

In order to realize these, even when the main power source of the mobile unit is turned off, the mobile unit communication apparatus is set in the wireless standby state so that it can perform the operations of remote command reception, current position acquisition and information transmission. Must have become.

[0007]

Generally, a mobile communication device such as a telematics communication device has a CPU for performing a radio stand-by process or an incoming call process. in this case,
To reduce power consumption when the main power is off, the CPU
It is conceivable to intermittently set the wireless standby state.
Such a CPU is reset at a timing such as when the main power is turned on. If the CPU is performing the wireless standby process or the incoming call process at the time of such a reset, the process is interrupted.

The present invention has been made in view of the above problems, and it is a first object of the present invention to prevent the processing from being interrupted when the CPU is performing the wireless standby processing or the incoming call processing.

Further, in a moving body such as a vehicle,
The battery voltage may fluctuate rapidly when the engine is started at the same time when the main power is turned on, and reset may not always be executed properly. Further, if the main power supply is turned on and off rapidly, the reset may not be executed properly. FIG. 6 shows the relationship between the power supply voltage change of the communication device and the reset signal when the main power is turned on after the main power is turned off, with the horizontal axis representing time and the vertical axis representing voltage value. If the time interval T between turning off and turning on the main power source is too short, the voltage immediately before turning on the main power source does not become sufficiently low, so that the main power source is not recognized and the reset as shown in FIG. The signal may not be generated.

A second object of the present invention is to ensure that the CPU can be reset when the main power is turned on.

[0011]

In order to achieve the above object, the mobile communication device according to claim 1 is a mobile communication device that intermittently enters a wireless standby state even when the main power of the mobile device is turned off. First to perform wireless standby processing
CPU (101) and reset means (201) for resetting the first CPU, and when the first CPU is performing the wireless standby process at the timing when the reset means resets, the reset means The feature is that it is not reset by.

As a result, the first CPU will not be interrupted during the wireless standby process.

Further, as an example of an operation procedure for the first CPU not to perform reset, in the invention described in claim 2, the reset means is the second CPU (201), and the second CPU is , From the first CPU to this first CPU
It is characterized in that it is determined not to perform the reset by determining that the wireless standby processing in-progress signal indicating that the wireless standby processing is being performed.

According to a third aspect of the invention, in the mobile communication device according to the first or second aspect, the first C
The PU further performs an incoming call process, and the reset unit is configured to prevent the reset unit from performing the reset when the first CPU is performing the incoming call process at the reset timing.

As a result, the first CPU will not be interrupted during further incoming call processing.

Further, as an example of an operation procedure for the first CPU not to reset, in the invention according to claim 4, in the mobile communication device according to claim 3, the second CPU further includes: It is characterized in that the first CPU determines that the incoming call processing signal indicating that the first CPU is performing the incoming call processing is output, and the resetting is not performed.

The invention described in claim 5 is the same as claim 1.
In the mobile communication device according to any one of items 1 to 4, the first CPU further performs wireless communication processing, and the resetting unit further performs wireless communication processing by the first CPU at a reset timing. It is characterized in that the resetting means does not perform the resetting when it is present.

This prevents the first CPU from being interrupted during the wireless communication process.

Further, as an example of an operation procedure for the first CPU not to perform reset, the invention according to claim 6 is
The mobile communication device according to claim 5, wherein the second CP
U further determines that the first CPU is outputting a wireless communication processing signal indicating that the first CPU is performing wireless communication processing, and does not perform reset. Is characterized by.

Further, in the mobile communication device according to claim 7, in the mobile communication device which is in the radio standby state intermittently even when the main power supply of the mobile body is turned off, the first CPU (for performing the radio standby process) 101) and a second CPU (201) in communication with the first CPU, and the first CP
U is configured to output a wireless standby processing signal to the second CPU while performing the wireless standby processing, and the second CPU outputs from the first CPU when the main power is turned on. It is characterized in that it is determined that the wireless standby processing signal is not output, and the first CPU is reset based on this determination.

As described above, by transmitting and receiving the reset signal through the communication between the CPUs, it is possible to avoid the situation where the reset is not properly executed when the main power is turned on, and the first CPU is surely reset. it can.

Further, in the invention described in claim 8, in the mobile communication device according to any one of claims 2 to 7, the second CPU has two kinds of operation modes, a sleep mode and an active mode. When the main power supply is turned on and the sleep mode is transited to the active mode, it is determined whether or not the wireless standby processing signal is output.
The mobile communication device according to claim 8, wherein the second CP
The U is characterized by determining whether or not the wireless standby processing signal is output even when the sleep mode is transited to the active mode by the signal from the external interface.

Here, the external interface exchanges signals for control and communication with, for example, the in-vehicle LAN and operation buttons.

According to a tenth aspect of the present invention, in the mobile communication device according to any one of the second to ninth aspects, the second CPU controls the power supply of the first CPU, When resetting the first CPU, the first C
Assert the reset signal output to the PU, and then the first
The power supply to the CPU is started and then the reset signal is negated.

That is, when the second CPU controls the power supply of the first CPU and resets the first CPU, the reset signal is surely asserted at the start of the power supply. The CPU 1 can be reliably reset.

Further, in the invention described in claim 11, in the mobile communication device which is in the wireless standby state intermittently even when the main power source of the mobile body is turned off, the first CPU (for performing the wireless standby processing and the incoming call processing) 101) and this first
And a reset means (201) for resetting the CPU of the first CPU, and when the first CPU is performing the incoming call processing at the timing when the reset means resets, the reset means does not perform the reset. Characterize. .

This prevents the first CPU from interrupting the incoming call processing.

The reference numerals in parentheses of the above means indicate the correspondence with the specific means described in the embodiments described later.

[0029]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below. FIG. 1 is a block diagram showing the internal configuration of the telematics communication device of this embodiment. This telematics communication device includes a radio unit 1 that transmits and receives radio signals, and a control unit 2.

The wireless unit 1 is provided with a wireless standby process, which will be described later.
A wireless unit CPU 101, which is a first CPU that performs incoming call processing and wireless communication processing, and a telephone communication module 102.
A GPS receiver 103, an RTC (real time clock) 104, a power-on reset circuit 105,
OR gate 106 and GPS receiver switch 107
And a telephone communication module switch 108.

Radio section CPU 101 sends a transmission signal for transmitting a radio signal from antenna 110 to telephone communication module 102, and receives a reception signal from antenna 110 via telephone communication module 102. The wireless unit CPU 101 also acquires position information from the GPS receiver 103 connected to the antenna 109. Further, the radio unit CPU 101 controls ON / OFF of the GPS receiver switch 107 for supplying power to the GPS receiver 103 and the telephone communication module switch 108 for supplying power to the telephone communication module 102.

The RTC 104 has a counter (not shown) for measuring time, and when the counter counts a predetermined time, it expires and turns on a power supply request signal (alarm is generated) as described later. Also, this RTC1
In 04, the radio unit CPU 101 resets the counter (alarm set) and turns off the power supply request signal. Here, turning on the power supply request signal refers to a signal having a high voltage level, and turning off the power supply request signal refers to a signal having a low voltage level.

When power is supplied, the power-on reset circuit 105 outputs a reset signal for power-on resetting the control unit CPU 101.

The control unit 2 is a second CPU and a control unit CPU 201 which is a reset means, and a power supply circuit 20.
2, a wireless power supply circuit 203, and an OR gate 204. The control unit 2 is controlled by the control unit CPU 201 to output an audio to an external audio output device (not shown) by an echo canceller (not shown).
have. The control unit CPU 201 is supplied with power from the power supply circuit 202, and controls the wireless unit power supply circuit 203 via the OR gate 204. The power supply circuit 202 receives power from an external battery power supply.

The control unit CPU 201 has a user input device such as operation buttons and an interface with an in-vehicle LAN, and also turns on and off an ignition switch (hereinafter referred to as IG) for controlling the main power supply of the vehicle. It also has an input line for sensing.

Car doors, horns, lamps, airbags,
Each part of the car such as air conditioner, stereo, etc.
Information is exchanged with the control unit CPU 201. For example, the control unit CPU 201 can detect the state of each unit such as whether or not the airbag is deployed via the in-vehicle LAN, or can control the behavior of each unit such as opening and closing the door of the vehicle.

The radio unit 1 and the control unit 2 are connected via the connector 3, and the power supply line 301 from the power supply circuit 202 is connected.
And a power supply line 302 from the wireless unit power supply circuit 203,
The power request signal line 303, the reset control line 304, and the serial communication line 305 carry signals between the wireless unit 1 and the control unit 2 through the connector 3.

The power supply line 301 is connected to the RTC on the radio section 1 side.
Therefore, the RTC 104 is always supplied with electric power. Further, power is supplied to the wireless unit CPU 101 on the wireless unit 1 side and the power-on reset circuit 105 via the power supply line 302.

When the IG is off, the control unit CPU 201 is in the sleep mode unless a wakeup signal from the outside is input, and the radio unit CPU 101 is in the state described below. RTC constantly receiving power
In 104, when the IG is off, the counter expires in 15 minutes, and when the counter expires, the RTC 104
Turns on the power supply request signal and sends it to the wireless unit power supply circuit 203 via the power supply request line 303.

When the wireless unit power supply circuit 203 senses that the power supply request signal is on, the switch provided therein turns on and supplies power to the wireless unit 1 via the power supply line 302. . This activates the power-on reset circuit 105 and sends a reset signal to the radio unit CPU 101 via the OR gate 106.

The radio section CPU 101 is connected to the radio section power supply circuit 2
From the power-on reset circuit 105 to the OR gate 1
A reset signal is received via 06 to perform a reset operation. The reset radio unit CPU 101 immediately controls the telephone communication module switch 108 so that the telephone communication module 102 is supplied with power.

FIG. 2 is a flow chart showing the procedure of the processing of the radio unit CPU 101 after the activation. This Figure 2
The operation of the radio unit CPU 101 will be described with reference to FIG.

First, the radio section CPU 101 performs a reset operation after starting. Immediately thereafter, the wireless unit CPU 101 starts wireless standby processing. First, in step S501, a so-called location registration operation of transmitting a wireless signal to a nearby wireless base station through the telephone communication module 102 is performed. After position registration, it is determined in step S502 whether or not an incoming call has arrived. At this time, it may be determined that the incoming call has arrived only when there are multiple incoming calls (incoming calls).
For example, within one minute 2
It may be determined that the incoming call is received only when the wireless unit CPU 101 detects that there is an incoming call. By doing so, it is possible to easily determine whether the incoming call is from a telematics server station or from another station.

As another example, the incoming caller's number notification or
It is determined that an incoming call has been received by receiving a prescribed message in a short message such as mail, and whether it is an incoming call from a telematics server station or an incoming call from a base station based on the calling number and the content of the message. It can also be determined. Further, in this example, even if there is an incoming call, the incoming call is data communication peculiar to the telephone network, for example, exchange of control information, and the control unit 2 is not required for the processing. If it is possible to discriminate from the content of the
No incoming signal is sent to the PU 201 (not shown in FIG. 2). Therefore, at this time, the control unit CPU 201 remains in the sleep mode even when the wireless unit CPU 101 is performing the wireless communication process.

If it is determined that there is no incoming call, the process proceeds to step S503, and a timeout is determined. Here, the timeout means that a predetermined time or more has elapsed since the location registration was completed in step S501.
The predetermined time for determining the timeout is, for example, about 30 seconds. If it is not determined here that the time-out has occurred, the process returns to step S502, and steps S502 and S50 are performed until an incoming call or time-out is determined.
The process of 3 is repeated. If it is determined that the timeout has occurred, the process proceeds to step S504.

In step S504, the alarm of the RTC 104 is set, and then in step S505, the RTC 10 is set.
The power supply request signal from 4 is turned off, and the wireless standby process ends. As a result, the power supply from the wireless unit power supply circuit 203 is cut off, and the operations of the wireless unit CPU 101 and the telephone communication module 102 are stopped. This series of processing is restarted when the RTC 104 alarm is generated, and if IG is turned off thereafter, this cycle is cyclical,
Or repeat intermittently. While the wireless standby process, the incoming call process, and the control unit CPU 201 performing the independent communication process in the sleep mode, the wireless unit CPU 101 keeps the CTS (Cl) of the serial communication line 305.
The ear to send) signal is set to a high level, and data indicating that each communication is being performed is output from the data line of the serial communication line 305. This CT
A set of the S signal and each data signal is a radio standby processing signal, an incoming signal, and a wireless communication processing signal wireless.

When it is determined in step S502 that there is an incoming call, the process proceeds to step S510, and the radio unit CPU1
01 is the control unit CPU 20 through the serial communication line 305.
An incoming signal is sent to 1. The incoming signal and the incoming call processing signal are different types of signals. When the control unit CPU 201 detects an incoming signal, the control unit CPU 201 transits from the sleep mode to the active mode, and instructs the wireless unit CPU 101 to turn off the power request signal so that the wireless unit power supply circuit 203 can be controlled by itself. It is transmitted via the communication line 305. Control unit CP that has received the instruction in step S511
U201 controls the RTC 104 to turn off the power supply request signal. After that, step S51 called service processing
The second service process is executed.

The service process is a process performed jointly by the wireless unit 1 and the control unit 2 in order to realize various applications of the telematics described above. The service that is started by an incoming call includes, for example, dealing with the theft of a car. The owner of the car, who realized that the car was stolen,
The service providing organization is notified to that effect, and the service providing organization receiving the notification sends a signal from the server station to the vehicle. For example, if the signal is a signal requesting the current position information of the vehicle, the wireless unit 1 of the telematics communication device of the vehicle which receives the signal receives the signal, and the wireless unit 1 of the above-described step S51.
0, the service process starts after the procedure of step S511. Here, the wireless unit CPU 101 turns on the GPS receiver switch 107 and acquires the position information using the GPS receiver 103. Then, the acquired location information is returned to the server station using the telephone module 102. In this way, the current position of the stolen car will be known.

When it is difficult to find one's own car in a small area, such as a large parking lot, compared to the above example,
When the server station is contacted by a mobile phone or the like and a predetermined procedure is performed, the server station sends a command signal to the car, for example, to ring a horn or blink a headlight.
The radio unit 1 of the vehicle telematics communication device that has received the signal transmits a command to the control unit 2, and the control unit 2 controls the horn or the headlight via the in-vehicle LAN. In this way, the location of the car becomes clear to those around them.

When the door key is forgotten and locked in the vehicle, or when the door cannot be locked / unlocked by the normal method, the server station is notified by a mobile phone or the like. The station sends a command signal to the car to lock / unlock the door. The telematics communication device of the vehicle that receives the signal controls the lock / unlock of the door via the in-vehicle LAN.

If position information acquisition by GPS is required in the service processing as described above, the wireless unit CP
U101 turns on the GPS receiver switch 107 as appropriate, and uses the GPS receiver 103 to acquire position information.

When the service processing is completed, the radio unit CPU
101 resets the counter of the RTC 104 in step S513. After that, the control unit CPU 201 turns off the power supply control signal, so that the radio unit CPU 101 stops together with the telephone communication module 102. The above is the main processing of the radio unit CPU 101 when the IG is off.

It should be noted that the radio unit C 101 detects the incoming call, and until the radio unit C receives the incoming call in step S502 and enters the service process in step S512.
It is assumed that the PU 101 is performing incoming call processing instead of standby processing. Also, when an incoming call is detected, the wireless unit CP
U201 sends an incoming call processing signal to the control unit CPU201 via the serial communication line 305, and at the same time outputs a ringtone to the control unit CPU201 via an audio signal line (not shown).

Further, the control unit CPU2 including the time when the IG is turned on
In the active mode 01, the radio unit CPU1
01 performs wireless standby processing except when communication required for service processing is performed.

The processing when the control unit CPU 201 enters the active mode will be described below. Control unit CPU
There are multiple triggers for the 201 to enter the active mode.
One is to receive an incoming signal from the radio unit CPU 101 as described above. The other is to receive an input signal from the outside, such as the IG on of the car, the LAN in the car, the user interface, or the like. As an input from the in-vehicle LAN, for example, when the person trying to steal a locked car exerts an excessive force on the vehicle body or breaks the window glass, the in-vehicle LAN automatically detects it. A case may be considered in which the telematics communication device is notified. At that time, the telematics communication device sends an alarm message toward the server station in response to the notification.
Upon receiving the message, the server station takes measures such as notifying the owner of the car or the police.

Control unit CP after entering the active mode
The processing of U201 is divided into two types, that is, the case where the active mode is entered by the incoming signal and the case where it is not. FIG. 3 is a flowchart showing the flow of processing of the control unit CPU 201 that has entered the active mode.

When the control unit CPU 201 makes a transition to the active mode, it is time to reset the radio unit CPU 101. Here, it is determined in step S520 of FIG. 3 whether the transition is due to an incoming signal. When it is determined that the transition is due to the incoming signal, the process proceeds to step S530, the power supply control signal from the control unit CPU 201 is turned on, and the signal is sent to the wireless unit power supply circuit 203 via the OR gate 204. Here, the power supply control signal ON means a signal whose voltage value is high level, and the power supply control signal OFF means a signal whose voltage value is low level.

Thereafter, in step S531, the radio unit CPU
101 to the RTC via serial communication line 305
An instruction to turn off the power supply request signal from 104 is transmitted. FIG. 4 shows the on / off timings of the power supply request signal and the power supply control signal in the processes of steps S530 and S531. The right direction in FIG. 4 is the direction of time flow. By these processes, the control of the radio unit power supply circuit 203 is controlled from the RTC 104 to the control unit CPU.
It will move to 201, but as you can see from Figure 4,
From step S530 to step S531, the control unit C
Since the power supply control signal or the power supply request signal is sent from at least one of the PU 201 and the RTC 104, the radio unit power supply circuit 203 remains on by the action of the OR gate 204, and therefore the power-on reset circuit 105 outputs the reset signal. Wireless unit CP
U101 is never reset.

If it is determined in step S520 that the transition is not due to an incoming call, that is, if it is determined that the transition is due to an IG on of the vehicle or an input signal from the outside such as the in-vehicle LAN or the user interface, the process proceeds to step S521. Then, it is determined by the CTS signal from the wireless unit CPU 101 whether the wireless unit CPU 101 is in the wireless standby process, the incoming call process, or the wireless communication process. If this determination is affirmative, the process proceeds to step S530, and as described above, the process proceeds to step S530.
In 530 and step S531, the RTC 10 controls the power supply of the wireless unit without resetting the wireless unit CPU 101.
4 to the control unit CPU 101. Here, as a case where it is determined that the wireless standby process is being performed, for example, IG
When it is turned on, the control unit CPU201 enters the active mode,
At that time, the radio unit CPU 101 may be performing any one of steps S501 to S503.

When the control unit CPU 201 becomes active during the incoming call processing, when a signal indicating that there is an incoming call is received from the wireless unit CPU 101, a ring tone is received from the wireless unit CPU 101 via an audio signal line (not shown), By controlling the echo canceller, this ring tone is output to an external voice output device. As a result, the user of the telematics device can be notified of the incoming call and can manually receive the call from the outside.

If the determination in step S521 is negative, the process proceeds to step S522, the control unit CPU 201 sets the wireless unit reset signal to low level (reset signal assertion), and the wireless signal is reset from the reset control line 304 via the OR gate 106. To the local CPU 101. Next, in step S523, the power supply control signal from the control unit CPU 201 is turned on, and the wireless unit power supply circuit 2 is supplied via the OR gate 204.
Sent to 03. As a result, the wireless unit power supply circuit 203 is turned on, and the wireless unit CPU 101 is activated. Radio section C
Since the reset signal via the reset control line 304 remains at the low level when the PU 101 is activated, the radio unit CPU 101 performs the reset operation, controls the telephone communication module switch, and controls the telephone communication module 10.
2 so that power is supplied. After that, the process proceeds to step S524, and after a predetermined time, the control unit CPU20
1 sets the radio unit reset control signal to a high level (reset signal negate). Step S522 to Step S
FIG. 5 shows the timings of the reset signal and the power supply control signal in the processing up to 524. The display format is the same as that of FIG. 4, and when the processing of step S524 or step S531 is completed, the processing is step S
Moving to 525, service processing is performed.

The outline of the service process is as described above, but examples of the service process when the IG is on include airbag automatic notification, car stereo / hands-free phone interlocking, e-mail service and the like.

In the automatic airbag deployment notification, when the airbag is deployed in the vehicle, the information is notified to the telematics communication device via the LAN. The telematics communication device that has received the notification acquires its own current position information using the GPS receiver 103 and transmits it to the server station using the telephone module 102 together with the airbag deployment information. The server station that receives the call contacts the driver in the vehicle by telephone. If the driver does not respond, or if the driver tells that there is an emergency such as an accident, the server station will contact the police, insurance companies, or arrange an ambulance.

In the car stereo / hands-free phone interlocking, when the driver performs telephone communication without holding the telephone,
You can hear the received sound from the car stereo speaker. This is because when the telephone call is made using the telephone module 102 of the telematics communication device, the control unit 2 sets the in-vehicle LAN
This is possible by controlling the car stereo through and outputting the received sound from the car stereo speaker.

The e-mail service is operated by operating the operation buttons of the telematics communication device or the computer connected to the in-vehicle LAN to connect to the Internet provider using the telephone module 102 to receive the e-mail, Alternatively, it transmits. At this time, the telematics communication device has its own display unit,
The content of the received mail may be displayed there, or the character information of the e-mail may be converted into voice information and read out by the car stereo speaker via the in-vehicle LAN. The transmission message may be input from the operation button, or the message stored in the computer may be transmitted via the in-vehicle LAN.

After the service processing is completed, the processing is step S.
Moving to 526, it is determined whether the IG is on or off. If the IG is on, the process is step S52.
Return to 5. When the IG is turned off, the process is step S52.
7, the control unit CPU 201 turns off the power supply control signal sent to the wireless unit power supply circuit 203 via the OR gate 204, and cuts off the power supply to the wireless unit CPU 101 and the like. Then, the process proceeds to step S528, sets itself in the sleep mode, and ends the process.

In the above operation, when the IG is off,
Unless otherwise specifically requested, the wireless unit CPU 101 has 15
Since the control unit CPU 201 is activated at intervals of minutes and enters the sleep mode, it is possible to reduce power consumption.

Further, by transmitting a reset signal from the control unit CPU 201 when the IG is turned on, the radio unit CPU 101 is reliably reset even when the power-on reset circuit 105 does not operate properly.

However, when the radio unit CPU 101 turns on the IG during the radio standby process, the incoming call process, and the radio communication process, the control unit CPU 201 does not send the reset signal and the steps S530 and S531.
As described above, the power-on reset circuit 105 does not send the reset signal by performing the processing in the order of turning on the power supply control signal → turning off the power supply request signal, thereby performing the wireless standby processing, the incoming call processing, and the wireless communication processing. Wireless part C
It is possible to prevent processing interruption due to the reset of the PU 101. (Other Embodiments) In the above-described embodiment, the telephone communication module switch 108 is used by the radio unit CPU 101 to control the power supply to the telephone communication module 102, but the telephone used is a digital telephone. In some cases, the telephone communication module switch 108 may be turned on / off in a shorter time and the voltage change caused thereby may be directly used as the transmission signal. In this case, the telephone communication module switch 108 is always turned on to turn on the wireless unit CP.
Power consumption can be suppressed more than when a transmission signal is sent via a signal line from U101.

Further, as shown in FIG. 1, it is not always necessary to notify the control unit CPU 201 of the on / off of the IG on a line different from the in-vehicle LAN, and the on / off of the IG may be notified via the in-vehicle LAN.

Further, it takes 15 minutes from the reset of the counter of the RTC 104 to the expire, but this may be any number of minutes.

Further, although the above-mentioned telematics communication device is divided into the radio unit 1 and the control unit 2, it is not always necessary to divide the communication device in this way.

Further, although this telematics communication device has a radio unit CPU 101 and a control unit CPU 201, it is not always necessary to divide the processing function of the communication device into two CPUs in this way, and one CPU can be used. You may perform a process collectively.

Further, the control unit CPU 201 operates in two kinds of operation modes, a sleep mode and an active mode, but this is not always necessary, and it may be always in an active state.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an in-vehicle communication device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a process of the wireless unit CPU 101 when the ignition switch is off in the embodiment of the present invention.

FIG. 3 is a flowchart showing a process of a control unit CPU 201 in an active mode according to the embodiment of the present invention.

FIG. 4 shows steps S530 and S in FIG.
FIG. 5 is a diagram showing on / off timings of a power supply request signal and a power supply control signal during processing with 531.

5 is a diagram showing timings of a reset signal and a power supply control signal during the processing from step S522 to step S524 in FIG.

FIG. 6 is a diagram showing a temporal behavior of a wireless unit power supply voltage when an ignition switch of a vehicle is switched from off to on.

[Explanation of symbols]

1 ... Wireless unit, 2 ... Control unit, 3, connector, 101 ... Wireless unit CPU, 102 ... Telephone communication module, 103 ... GP
S receiver, 104 ... RTC, 105 ... Power-on reset circuit, 106, 204 ... OR gate, 109, 11
0 ... Antenna, 201 ... Control part CPU, 202 ... Power supply circuit, 203 ... Radio part power supply circuit, 301, 302 ... Power supply line, 303 ... Power supply request signal line, 304 ... Reset control line, 305 ... Serial communication line.

Claims (11)

[Claims] 1. A first CPU (101) that performs a wireless standby process and resets the first CPU in a mobile communication device that intermittently enters a wireless standby state even when a main power source of the mobile body is turned off. Resetting means (20
1) and, when the first CPU is performing the wireless waiting process at the timing when the reset unit performs the reset, the reset by the reset unit is not performed. Mobile communication device. 2. The reset means includes a second CPU (2
01), and the second CPU is the first CPU
From the above, the resetting is not performed by determining that the wireless standby processing in-progress signal indicating that the first CPU is performing the wireless standby processing is output. 1. The mobile communication device according to 1. 3. The first CPU further performs an incoming call process, and the reset unit resets the reset unit by the reset unit when the first CPU is performing an incoming call process at the timing of performing the reset. 3. The method according to claim 1 or 2, characterized in that
The mobile communication device according to. 4. The second CPU further determines that an incoming call processing signal indicating that the first CPU is performing the incoming call is output from the first CPU, and the second CPU The mobile communication device according to claim 3, wherein resetting is not performed. 5. The first CPU further performs a wireless communication process, and the reset unit performs the reset process when the first CPU is performing a wireless communication process at a timing of performing the reset. The mobile communication device according to any one of claims 1 to 4, wherein the reset is not performed. 6. The second CPU further determines that a wireless communication processing signal indicating that the first CPU is performing the wireless communication processing is output from the first CPU. The mobile communication device according to claim 5, wherein the reset is not performed. 7. A mobile communication device, which is in a wireless standby state intermittently even when the main power of the mobile body is turned off, communicates with a first CPU (101) that performs a wireless standby process. A second CPU (201), wherein the first CPU outputs a wireless standby processing in-progress signal to the second CPU while performing the wireless standby processing, The second CPU determines that the wireless standby processing in-progress signal is not output from the first CPU when the main power is turned on, and resets the first CPU based on this determination. A mobile communication device comprising: 8. The second CPU operates in two kinds of operation modes, a sleep mode and an active mode, and is in the wireless standby process when the main power supply is turned on and the sleep mode is transited to the active mode. 3. The method according to claim 2, wherein it is determined whether or not a signal is output.
7. The mobile communication device according to any one of 7 to 7. 9. The second CPU determines whether or not the wireless standby processing in-progress signal is output even when transitioning from sleep mode to active mode by a signal from an external interface. The mobile communication device according to any one of claims 2 to 8. 10. The second CPU is the first CP.
When controlling the power supply of U and resetting the first CPU, a reset signal to be output to the first CPU is asserted, and then power supply to the first CPU is started,
10. The mobile communication device according to claim 4, wherein the reset signal is negated thereafter. 11. A mobile communication device which intermittently enters a wireless standby state even when the main power of the mobile device is turned off,
First CPU that performs wireless standby processing and incoming call processing
(101) and reset means (20) for resetting the first CPU
1) and, when the first CPU is performing the incoming call processing at the timing when the reset means performs the reset, the reset means does not perform the reset. Mobile communication device.