JPH01318326A - Mobile object communication equipment - Google Patents

Abstract

PURPOSE:To surely inform whether or not a mobile object communication equipment is within a service area by generating a 2nd audible sound when the mobile object communication equipment is discriminated to be at the outside of the service area of a base station. CONSTITUTION:In the receiving a synchronization establishment signal outputted from a base station representing the synchronization state of a prescribed control signal from a control signal processing section 168, a CPU outputs a 1st audible sound generating signal to an audio section control section 169, an audible sound generating section 121 outputs the 1st audible sound signal and the 1st audible sound signal informing in-service area is outputted from a speaker 113. Moreover, the CPU 161 outputs the 2nd audible sound generating signal in receiving a synchronizing step-out signal from the control signal processing section 168, and the 2nd audible sound representing out of the service area is outputted from the speaker 113. Thus, whether or not the mobile object communication equipment is within the service area is surely informed the user.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to mobile communication devices such as radio telephone devices and portable radio telephone devices used in moving objects such as automobiles and people. Regarding.

(Prior Art) Telephone systems have become widespread as a means of transmitting information. Furthermore, in recent years, telephone services have become more diverse, and services that provide mobility to telephones have been implemented. For example, there are wireless telephones that are equipped with telephones in mobile bodies such as transportation vehicles such as automobiles, and portable wireless telephones that can be carried by individuals.

Such wireless telephones can communicate only within the service area of the base station.

Therefore, it is necessary to inform the user whether or not the wireless telephone device is within the service area. Conventionally, a predetermined visual display is provided on the display section provided on the device body to inform the user whether or not the wireless telephone device is within the service area. was being carried out.

However, in mobile communication devices such as car phones that move at high speed and cannot always attract the user's attention due to driving, etc., there is a device installed in the device itself that detects whether the device is within the service area or not. However, if a predetermined visual display is displayed on the display section, there is a problem that it is difficult for the user to easily confirm the information.

(Problems to be Solved by the Invention) The above-described mobile communication device has a problem in that it is difficult to easily confirm whether or not the mobile communication device is within the service area.

This invention is intended to solve the above-mentioned problems, and aims to provide a mobile communication device that can reliably inform the user whether or not the mobile communication device is within a service area. .

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a mobile communication device that transmits and receives data to and from a base station via a wireless line, based on signals sent from the base station. Discrimination means for determining whether a communication device is within a service area of the base station;
an audible sound generating means for generating an audible sound; and a determination result by the discriminating means, when the mobile communication device is determined to be within the service area of the base station, the audible sound generating means generates a first audible sound. control means for generating an audible sound and controlling the audible sound generating means to generate a second audible sound when it is determined that the mobile communication device is outside the service area of the base station; It is.

(Function) In the present invention, the first audible sound is generated when it is determined that the mobile communication device is within the service area of the base station, and the first audible sound is generated when the mobile communication device is determined to be within the service area of the base station. Since the second audible sound is generated when it is determined that the mobile communication device is within the service area, it is possible to reliably notify the user whether or not the mobile communication device is within the service area.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram illustrating an embodiment in which the present invention is applied to a portable and vehicle-mounted wireless telephone device.

The radio telephone device shown in the figure is composed of a portable radio device 100 and a vehicle-mounted section main body 200.

The portable radio device 100 includes an antenna 101 and a changeover switch 1.
02. An audio/control unit that performs overall control of the entire device, consisting of a radio unit 103 that forms a wireless line with a base station (not shown) and transfers signals, a control unit 104, and an audio unit 105. unit 106, IDROM 107 in which the system ID number of the zone corresponding to the location where this device is registered and the telephone number corresponding to the location where this device is registered are registered, a power selector switch 1;
08 and controls the power supply in the portable radio 100, a rechargeable battery 1101 that serves as a power source when portable, a connection section 111 connected to the vehicle-mounted section main body 200, an operation display section 112, and an audible sound source. speaker 113 and microphone] 14, output amplifier 11
5. The main part consists of an input amplifier 116. The operation display section 112 displays a key part 1 on which a predetermined key is manually operated.
17, a display section 118 that displays a predetermined display, a switch section 119 that performs various switching operations, a key part 117, a display section 11
8 and the switch section 119, an audible sound generating section 121 that outputs a predetermined first audible sound signal or a second audible sound signal, and a voltage supply path 131.
The voltage detection circuit 130 detects the voltage level of the voltage.

The output amplifier 115 amplifies an audible sound signal (voice signal) sent from the audio section 105 and the audible sound generation control section 121 of the portable radio device 100 and outputs it from the speaker 113. The input amplifier 116 amplifies the audible signal (speech signal) input from the microphone 114. The amplified signal is input to the audio section 105 of the portable radio device 100.

The operation/display control unit 120 is an audio/control unit]06
It performs overall control on the operation display section 112 side based on control signals sent from the key section 117, and also sends control signals input from the key section 117 to the audio/control section 106. The display unit 118 consists of a liquid crystal display (not shown) and a display driver.
Based on the control of the display control unit 120, the liquid crystal display is driven to perform a predetermined display. The key part 117 is "0" to "9".
” number keys, “*”, “#”, rsNDJ, rsTO
J, rENDJ, rRCLJ, rFcNJrCLRJ,
It consists of a keypad (not shown) such as rEMRJ, [MUTEJ, and rTONEJ function keys, and when the keypad is pressed, this is recognized by the operation/display control unit 120. The switch unit 119 is provided with a hook switch and an 0N10FF switch (not shown), and the hook switch detects whether the portable radio device 100 is on-hook or off-hook. Note that the hook switch may also be provided on the vehicle-mounted section main body 200. The 0N10FF switch switches the 0N10FF of the entire wireless telephone device, and the switching signal is sent from the operation/display control section 120 to the audio/control section 106.

The in-vehicle main unit 200 includes an antenna 20 attached to the vehicle.
1. A booster 202 that amplifies the signal transmitted and received by the antenna 201 to a constant power, and a booster 202 that amplifies the signal transmitted and received by the antenna 201, and a booster 202 that amplifies the signal transmitted and received by the antenna 201.
Audio/control unit 203 that performs overall control of the entire 0
, a power supply control unit 204 that supplies power from the vehicle battery B to each part, a connection unit 205 that is connected to the connection unit 111 of the portable radio 100 via the coaxial cable 300, and a speaker 206 for inputting and outputting audible sounds. and microphone 207
, an output amplifier 208, and an input amplifier 209. The booster 202 is an antenna duplexer 21
0.211, receiving amplifier 212, transmitting amplifier 213
, and an automatic power control circuit (APC) 214 that controls the transmission level of the transmission amplifier 213.

Next, details of the portable radio device 100 will be explained.

FIG. 2 is a block diagram showing in detail the configuration of the above-mentioned portable radio device 100.

As shown in the figure, the radio section 103 includes a demodulator 131, a modulator 132, a power amplifier 133, a duplexer 134,
It consists of a synthesizer 135. Demodulator 131
is connected via the antenna 101 on the portable radio device 100 side, the changeover switch 102, and the duplexer 134, or the antenna 201 on the vehicle-mounted section main body 2°O side, the booster 2o2,
It demodulates the received signal from the base station that is input via the changeover switch 102 and the duplexer 134. Note that this signal includes a control signal, an audible sound signal, and the like. The modulator 132 modulates the audible signal, control signal, etc. output from the audio/control unit 106 to generate a transmission signal. Power amplifier 133 amplifies the transmission signal output from modulator 132. The duplexer 134 is
A received signal input via the antenna 101 or 201 is sent to the demodulator 131, and a transmitted signal input via the modulator 132 and power amplifier 133 is sent to the antenna 101 or 201.

The synthesizer 135 is a local oscillator for channel selection, and the frequency to be demodulated by the demodulator 131 and the frequency to be demodulated by the modulator 13
2 specifies the frequency to be modulated.

The audio/control unit 106 includes a CPU 161, an oscillator/
Frequency divider 162, address decoder 163, ROM 164
, RAM 165, radio section control section 166, audio section 1
67, control signal processing section 168, audio section control section 16
9, a digital interface 170, and an interrupt controller 171. In the figure, 107 is the above-mentioned IDROM, 109 is a power supply control section, 121 is an audible sound generation control section, 172 is, for example, an 8-bit data bus, 173 is an address bus, and 174 is a control bus.

The CPU 161 performs overall control of the entire audio/control section 106, and the oscillator/frequency divider 162 controls the entire audio/control section 106.
61, and also divides the frequency of this clock and supplies it as a timing signal to each part. Address decoder 163 outputs predetermined operation signals to each section in response to command signals from CPU 161. ROM164 is
It stores various programs necessary for the operation of the CPU 161.

The RAM 165 stores various data during processing by the CPU 161. The wireless unit control unit 166
The wireless unit 103 is controlled based on the command. For example, the radio unit control unit 166 controls the frequency that the synthesizer 135 should specify, the amplification factor that the power amplifier 133 should amplify,
The modulator 132 instructs the degree of modulation to be modulated, and also inputs an out-of-synchronization signal output from the synthesizer 135, an output detection signal output from the power amplifier 133, etc. as a measure to prevent malfunction, and transmits these to the CPU 161. The audio section 167 sends a control signal of the received signal demodulated by the demodulator 131 to the control signal processing section 168, and also sends an audible sound signal of the received signal to the output amplifier 115.
It is sent to the speaker 113 via. The audio unit 167 also sends the control signal output from the control signal processing unit 168 and the audible sound signal output from the microphone 114 via the input amplifier 116 to the modulator 132.

Note that the audio section 167 has functions of waveform shaping of the control signal to be sent to the control signal processing section 168 and filtering of the control signal to be sent to the modulator 132.

The control signal processing section 16a performs bi-soto synchronization and frame synchronization with the control signal output from the audio section 167, and converts the control data from the base station included in the control signal, which is a serial signal, into a parallel signal. On the other hand, the control data as a parallel signal to be sent to the base station is taken in as a serial signal as a control signal in the audio section 1.
67. Here, the control signal processing section 16 described above
In step 8, when obtaining a predetermined synchronization with the input control signal, synchronization is first obtained for the D channel from the input predetermined control signal. The D channel includes system information and at least a signal for specifying the P channel band. When the D channel is synchronized, the P channel is synchronized. This P channel includes system information, an incoming call signal, and a signal for specifying the band of the A channel, and when synchronization on the P channel is achieved, the standby state is enabled. Next, synchronize the A channel. This A channel includes system information and a communication channel designation signal.

The audio section control section 169 performs various controls on the audio section 167. For example, the audio section control section 169
is the switching control that sends the received signal from the audio section 167 to the control signal processing section 168 or the output amplifier 115, or the control signal processing section 168 or the transmission signal output from the input amplifier 116. Switching control is carried out to be input to the section 167.

Digital interface 170 provides an interface between audio/control section 106 and operation display section 112 . The interrupt controller 171 interrupts the CPU 161 in response to interrupt commands from various parts.

Next, the configurations of the audible sound generation control section 121 and the power supply control section 109 will be explained using FIG. 3.

As shown in the figure, the power supply control section 109 is connected to the vehicle-mounted section main body 2.
It is connected to the power supply control section 204 on the 00 side via the connection section 205.111, and is also connected to the switching terminal of the power supply changeover switch 108 connected to the rechargeable battery 110 side. Further, the power supply control section 109 is connected to the CPU 161, the audio section control section 169, the control signal processing section 168, and the radio section control section 166 via a power supply line 191.

The power supply line 191 of the power supply control unit 109 includes a switch 1.
92 is provided. The switch 192 is switched between 0N10FF by a switch switching circuit 193.

A timer 194 is connected to the switch changeover circuit 193 so that the timer 194 can perform a changeover operation of the switch changeover circuit 193. Further, the CPU 161 is connected to the switch changeover circuit 193 and the timer 194 via a control line 195.

Further, the CPU 161 is connected to a wireless section control section 166, a control signal processing section 168, and an audio section control section via a control line 196. The audio section 167 is connected to the control signal processing section 168 and the audio section control section 169 via a signal line 197, and the audible sound generation control section 121 is connected to the audio section 167. A speaker 113 is connected to the audio section 167 and the audible sound generation control section 121 via an output amplifier 115.

Then, in the control signal processing unit 168, the CPU 161 receives a predetermined control signal output from the base station.
, A synchronization establishment signal that is output when each channel is synchronized is received from the control signal processing unit 168.
A first audible sound generation signal is output to notify the audio unit control unit 169 that it is within the service area.

As a result, the first audible signal is output from the audible sound generator 121, and the first audible sound for notifying that the service area is outside is outputted to the speaker 1 via the output amplifier 115.
It is output from 13. In addition, the CPU 161 uses the control signal processing unit 168 to process P in response to a predetermined control signal output from the base station.

When the control signal processing unit 168 receives an out-of-synchronization signal that is output when each of the A channels cannot be synchronized, a second audible sound is generated to notify the audio unit control unit 169 that the service area is outside. Output a signal. As a result, the second audible signal is output from the audible sound generator 121, and the second audible sound is output from the speaker 113 via the output amplifier 115 to notify that the user is outside the service area. After this, the CPU 161 operates the timer 194 and opens the switch 192 using the switch switching circuit 193. The above-described synchronization establishment signal is output when a predetermined synchronization is achieved in a PSA channel or in response to a predetermined control signal from a base station when the wireless telephone device is within a predetermined service area. Further, an out-of-synchronization signal is output when the radio telephone device leaves a predetermined service area and a predetermined synchronization cannot be achieved in a predetermined control signal from a base station or in P and A channels. Then, by opening the above-mentioned switch 192, C, P
U 161, wireless unit control unit 166, control signal processing unit 16
8. The power of the audio unit control unit 169 is turned off,
Enters battery saving state. In addition, at this time, the RAM
A timer mode flag indicating timer operation indicating this state is set in 165, and RAM 165 is operated by a backup battery (not shown). Further, when the timer 194 times out, this signal is output to the switch changeover circuit 193, the switch 192 is closed, and power is supplied to the CPU 161 and each section.

Further, the voltage detection circuit 130 detects the voltage of the power supply path 131, and if the voltage of the power supply path 131 is equal to or higher than a predetermined voltage, the voltage detection circuit 130 switches the power supply changeover switch 108 to the power supply path 131.
and the power supply control section 109 are connected to each other, and the changeover switch 102 is connected to the wireless section 103 and the booster 20.
2 are connected to each other. If the voltage of the power supply path 131 is less than a predetermined voltage, the power supply changeover switch 108 is driven to connect the rechargeable battery 110 and the power supply control unit 109, and the changeover switch 102 is driven to connect the wireless unit 103.
and the antenna 101 are connected to each other. Therefore, when the portable radio device 100 is not connected to the in-vehicle section main body 200, the power control section 109 is supplied with power from the rechargeable battery 110, and the radio section 103 is connected to the antenna 101.

Next, the operation of the radio telephone device configured as described above will be explained using the state transition diagram shown in FIG. 4.

As shown in the figure, first, when the power of the portable radio device 100 is turned on (including when the power is turned on after the timer 194 has timed up) (S'T1), the CPU 1
61 accesses the RAM 165 and confirms the timer mode (Sr1). When it is confirmed that the timer mode is not set, a hard check of each part is performed (ST3).

Next, initialization is performed. At this time, in Sr1, initialization is performed even when the power is turned on due to time-up from the timer mode (Sr4). In this initialization, the control signal processing unit 168 synchronizes the system information of the D channel with the strongest received field strength (R8SI measurement) among the plurality of D channel signals in a predetermined control signal.

The D channel includes a signal specifying the P channel band. When the D channel is synchronized and initialized, the P channel is synchronized (Sr1). This P channel synchronization is performed in the control signal processing unit 168 by synchronizing the P channel with the strongest received field strength (R8Sl measurement) among a plurality of P channel signals in a predetermined control signal. The P channel includes system information, an incoming call signal, and a signal specifying the band of the A channel.

After this, the A channel is synchronized (Sr1). This A channel synchronization is achieved by synchronizing multiple A channels in a predetermined control signal.
Among the channel signals, the received field strength is the strongest (R8S
1 measurement) The A channel is synchronized in the control signal processing section 168. The A channel contains system information and a communication channel designation signal.

In this state, the standby state is reached, and the control signal processing unit 1
68 outputs a synchronization establishment signal to the CPU 161, and thereby the CPU 161 outputs a first audible sound generation signal to inform the audio section control section 169 that it is within the service area.

As a result, the first audible signal is output from the audible sound generator 121, and the first audible sound for notifying that the service area is within the service area is outputted to the speaker 1 via the output amplifier 115.
13 (Sr1), and it becomes possible to make and receive calls. If synchronization is not obtained at Sr1.5, the process shifts to Sr8 and the battery save operation continues. Also, if synchronization cannot be achieved in Sr1 (
(out of synchronization) is transmitted from the control signal processing unit 168 to the CPU 161.
An out-of-sync signal is output to the CPU 161.
outputs a second audible sound generation signal to notify the audio unit control unit 169 that it is outside the service area. As a result, the second audible signal is output from the audible sound generator 121, and the second audible sound for notifying that the service area is outside is output from the speaker 113 via the output amplifier 115 (Sr8). After this, CPU16
1 activates the timer 194 and further opens the switch 192 by the switch changeover circuit 193.

As a result, the power of the CPU 161, the wireless section control section 166, the control signal processing section 168, and the audio section control section 169 is turned off (S T 9). After this, when the timer 194 times up, the process returns to STI.

Next, the operation of synchronization detection in each channel will be explained.

FIG. 5 is a flowchart for explaining the operation of D channel synchronization detection.

As shown in the figure, first, the received electric field strength of a plurality of D channels is measured (R8SIi'JFJ determination) from a predetermined control signal input in the control signal processing unit 168 (S
TII). Then, the D channel with the strongest electric field strength is selected (ST12). Thereafter, the selected D channel is synchronized and establishment of synchronization is detected (ST13). This 5
If synchronization is not established at T13 (out of synchronization), for example, a counter in the CPU 161 is counted up (ST14). Next, it is confirmed whether the counter value of the counter is 5 or more (ST15).

In STI 5, if the counter value is less than 5, the process returns to 5T13 and detection of synchronization establishment is performed. Also,
At 5T15, if the counter value is 5 or more, an out-of-synchronization signal is sent from the control signal processing unit 168 to the CPU 16.
1, thereby causing the CPU 161 to output a second audible sound generation signal for notifying the audio section control section 169 that it is outside the service area. This results in
A signal is output from the audio section 167, a second audible signal is output from the audible sound generation control section 121, and a second audible sound is output from the speaker 113 via the output amplifier 115 to notify that the service area is outside. Output.

After that, the CPU 161 activates the timer 194 of the power supply control section 109, and the switch changeover circuit 19
3 to open the switch 192, and the CPU 161
, the power to the wireless section control section 166, control signal processing section 168, and audio section control section 169 is turned off. Also, 5T13
If synchronization is established, the operation moves to P channel selection using a signal specifying the P channel band obtained from the D channel.

Next, the synchronization detection operation in the P channel will be explained.

FIG. 6 is a flowchart for explaining the operation of P channel synchronization detection.

As shown in the figure, first, the received electric field strength of a plurality of P channels is measured (R8SIi91 standard) from a predetermined control signal inputted in the control signal processing unit 168 (ST2
1). Then, the P channel with the strongest electric field strength is selected (S T 22). Thereafter, the selected P channel is synchronized and establishment of synchronization is detected (ST23). This 5
If synchronization is not established at T23 (out of synchronization), for example, a counter in the CPU 161 is counted up (ST24). Next, it is confirmed whether the counter value of the counter is 5 or more (S T 25).

At 5T25, if the counter value is less than 5, the process returns to 5T23 and detection of synchronization establishment is performed. Also, 5
At T25, if the counter value is 5 or more,
The control signal processing unit 168 sends an out-of-synchronization signal to the CPU 16]
This causes the CPU 161 to output a second audible sound generation signal to notify the audio section control section 169 that it is outside the service area. As a result, the audio section 167 outputs a signal, the audible sound generation control section 121 outputs a second audible sound signal, and the output amplifier 1
15, a second audible sound is output from the speaker 113 to notify that the user is out of the service area. After that, the CPU 161 activates the timer 194 of the power supply control section 109, and also activates the switch changeover circuit 193.
is operated to open the switch 192, and the CPU 161,
Power to the wireless unit control unit 166, control signal processing unit 168, and audio unit control unit 169 is turned off. Further, in 5T23, when synchronization is established, a signal specifying the band of the A channel obtained by the P channel is used to shift to a standby operation, which is an operation for selecting the A channel.

Next, the operation of synchronization detection in the A channel will be explained.

FIG. 7 is a flowchart for explaining the operation of A channel synchronization detection.

As shown in the figure, first, the received electric field strength of a plurality of A channels is measured (R8SI measurement) from a predetermined control signal input in the control signal processing unit 168 (ST31).
. Then select the A channel with the strongest electric field strength (S
T32). Thereafter, the selected A channel is synchronized and establishment of synchronization is detected (ST33). In this step 5T33, if synchronization is not established (out of synchronization), for example, a counter in the CPU 161 is counted up (ST34). Then, the counter value of the counter becomes 5.
Check if the above is true (S, T35).

At 5T35, if the counter value is less than 5, the process returns to 5T33 and detection of synchronization establishment is performed. Also, 5
At T35, if the counter value is 5 or more,
An out-of-synchronization signal is sent from the control signal processing unit 168 to the CPU 161.
As a result, the CPU 161 outputs a second audible sound generation signal to notify the audio section control section 169 that the service area is outside. As a result, the audio section 167 outputs a signal, the audible sound generation control section 121 outputs a second audible sound signal, and the output amplifier 1
15, a second audible sound is output from the speaker 113 to notify that the user is out of the service area.

After that, the CPU 161 activates the timer 194 of the power supply control section 109, and the switch changeover circuit 19
3 to open the switch 192 and turn off the power to this wireless telephone device. In addition, in 5T33, when synchronization is established, the standby state is entered, and a synchronization establishment signal is output from the control signal processing unit 168 to the CPU 161, whereby the CPU 161 informs the audio unit control unit 169 that it is within the service area. A first audible sound generation signal for notification is output. As a result, the audio section 16
7, a first audible signal is output from the audible sound generation control section 121, and a first audible sound is output from the speaker 113 via the output amplifier 115 to notify that the service area is within the service area. (ST36). After this, it is confirmed whether there are outgoing or incoming calls (ST37).
, if there is an outgoing/receiving call, the mode is set to outgoing/receiving mode, and if there is no outgoing/receiving call, the mode is set to standby mode. When in standby mode, the process returns to 5T33 and establishment of synchronization is detected.

Therefore, in this embodiment, the establishment of synchronization of a predetermined channel in a control signal is detected, and when synchronization is established, it is determined that the wireless telephone device is within the service area, and the user is informed that this wireless telephone device is within the service area of the base station. A first audible sound is output to notify the user that the wireless telephone device is outside the service area of the base station, and if synchronization is not established, it is determined that the wireless telephone device is outside the service area. It outputs a second audible tone to notify the user, and also turns off the power to the control system, transmission/reception system, and audible input/output system of this wireless telephone device, so that the user can be assured that this wireless telephone device is not in service at the base station. It is possible to notify whether or not the vehicle is within the area, and it is also possible to prevent unnecessary battery consumption.

In the embodiment described above, the base station determines whether or not the wireless telephone device is within the service area of the base station when synchronization with a predetermined control signal in the signal from the base station has not been established five or more times. It was determined that it was outside the service area of
It may be determined that the base station is outside the service area when synchronization with a predetermined control signal is not established once or multiple times.

Furthermore, in each of the embodiments described above, whether or not this wireless telephone device is in the service area of the base station is determined by the base station's service when synchronization with a predetermined control signal in the signal from the base station is not established. Although it is determined that the base station is outside the area, it may be determined that the base station is outside the service area when the electric field strength of the control signal is measured and the value of the measured electric field strength is smaller than a predetermined threshold.

In addition, in the above description, by emitting sound from the audible sound generating unit 121 provided on the side of the portable radio 100, the zone can be set regardless of whether or not the portable radio 100 is connected to the vehicle-mounted unit main body 200. I made it so that it makes a sound when you go outside or enter the zone, but
When connected to the vehicle-mounted section main body 200, an audible sound generating section 221 provided in the vehicle-mounted section main body 200 may generate a sound.

Further, in the above embodiment, the operator is notified by a simple sound, but the audible sound generating section 121 is configured by a voice synthesis IC, and the synthesized voice is used to notify that the operator is inside or outside the zone. You can.

Furthermore, in the above-described embodiment, the notification is made based on the timing when the area is inside the zone or the timing when the area is outside the zone, but the notification may be made based on the timing when the operator performs some operation. .

For example, the following cases can be considered:

(1) When installed in a vehicle, that is, when the vehicle-mounted section main body 200 and the portable radio device 100 are connected, when the operator picks up the handset (portable radio device 100) to make a call, does the handset make a ringing sound? , difference in sound tone,
Alternatively, the operator may be informed of the inside and outside of the rezone using a synthesized voice. In this case, the CPU 161 controls the portable radio 1 based on the signal from the voltage detection circuit 130.
00 is in a connected state with the vehicle-mounted section main body 200. If the hook switch 230 is in the connected state, the open/close state of the hook switch 230 is detected, and when the hook switch 230 is in the closed state, that is, the off-hook state, the content of the flag indicating that the hook switch 230 is located inside or outside the zone is referred to, for example, the state is determined to be within the zone. If so, the audible sound generator 121 is driven to make a sound, and if it is outside the zone, the operator is notified by making the sound silent.

(2) When making an off-hook call, making a call by voice dialing, or making a call when the portable radio 100 is disconnected from the in-vehicle main body 200, the operator operates the numeric keypad or predetermined operation keys to make the call. Based on the timing, the speaker 206 or 113 makes a notification.

In this case, the CPU 161 detects whether or not the key portion 117 is operated. When a key operation is detected, the operator is notified with an audible sound whether the operator is inside or outside the zone by referring to the contents of the flag indicating whether the operator is inside or outside the zone. .

[Effects of the Invention] As explained above, the mobile communication device of the present invention generates the first audible sound when it is determined that the mobile communication device is within the service area of the base station, and Since the second audible tone is generated when it is determined that the mobile communication device is outside the service area of the base station, the user can be sure whether the mobile communication device is within the service area or not. can be informed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram illustrating an embodiment in which the mobile communication device of the present invention is applied to a portable and vehicle-mounted type radio telephone device, and FIG. 2 illustrates details of the portable radio device shown in FIG. 1. 3 is a block diagram for explaining the audible sound generation control section and power supply control section in FIG. 2, and FIG. 4 is a block diagram for explaining the operation of the radio telephone device in FIG. 1. The transition diagrams, FIG. 5, FIG. 6, and FIG. 7 are flowcharts for explaining the synchronization establishment detection operation of each channel in FIG. 4, respectively. 100...Portable radio, 101.201...Antenna, 103...Radio unit, 106...Audio/control unit, 115...Output amplifier, 113...Speaker, 121...Possible Auditory sound generation control unit, 161...CPU
, 167... Audio section, 168... Control signal processing section, 169... Audio section control section. Applicant Toshiba Corporation Patent Attorney Sasa Suyama - Incoming Calls Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] (1) In a mobile communication device that transmits and receives data to and from a base station via a wireless line, whether or not this mobile communication device is within the service area of the base station based on a signal sent from the base station. an audible sound generating means that generates an audible sound; and an audible sound generating means that generates an audible sound when a determination result by the determining means determines that the mobile communication device is within a service area of the base station. generating a first audible sound by the generating means;
When it is determined that this mobile communication device is outside the service area of the base station, the audible sound generating means causes the second
a control means for controlling the generation of an audible sound.