JP3481531B2 - Incoming call control method and mobile radio communication system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an incoming call ringing control method for controlling incoming call ringing of a mobile terminal, and a mobile radio communication system to which the incoming call ringing control method is applied.

[0002]

2. Description of the Related Art Generally, the ringing of a mobile terminal is set by the user of the mobile terminal operating the mobile terminal in advance. Here, the user of the mobile terminal, when setting the ringing of the incoming call, sets in consideration of the surrounding environment of the place where the user is currently. For example, the ringing tone volume is set to be high in a place where ambient noise is loud, and the ringing tone volume is set to be low in a place where ambient noise is low. In this way, when an incoming call arrives at a mobile terminal with the ring alert set, the incoming call information is sent from the wireless base station to the mobile terminal through the wireless line, and the mobile terminal receives the incoming call according to the ring alert setting. Sound.

[0003]

However, the ringing tone is set by the user of the mobile terminal in consideration of the surrounding environment at the time of using the mobile terminal. , The incoming call environment was appropriate, but due to changes in the surrounding environment due to the movement of the user, an inappropriate incoming call environment may be set.

For example, in a place with a little noise,
If you set the ringtone volume to the maximum level and ring the ringtone at a quiet music performance ceremony hall or museum, on the contrary, set the ringtone volume to the minimum level and move to a noisy place. Such as when.

In this case, in the former case, the ringing tone volume is too high to disturb others, and in the latter case, the ringing tone is too low to be noticed to the user. There was a problem of doing it.

The present invention has been made in order to solve the above-mentioned problems, and is capable of automatically controlling the volume of incoming call ringing according to the surrounding environment in which the mobile terminal is used. A method and a mobile radio communication system.

[0007]

[0008]

Means for Solving the Problems] incoming ringing control method according to the present invention, the mobile terminal measures the noise level in the surrounding environment of the radio base station by the microphone, and notifies the noise level measured in the radio base station, In the wireless base station, the incoming call type by the mobile terminal is determined according to the noise level notified from the mobile terminal , the determined incoming call type is notified to the mobile terminal, and in the mobile terminal, the incoming call type notified by the wireless base station is set. It is made to ring based on.

[0009]

The radio base station is installed in a closed environment such as a factory or a room and communicates with mobile terminals in the environment. That is, since the wireless base station communicates with the mobile terminals existing in the closed environment, by measuring the noise level in the environment, it is possible to appropriately set the ringing volume of the mobile terminals in the environment. it can.

In the mobile radio communication system, each radio base station may be housed in a private branch exchange. In a private system that is exchange-controlled by a private branch exchange, there are often various closed environments such as factories and indoors, and it is effective to apply this system.

It is preferable that the radio base station includes a signal processing unit that does not detect instantaneous noise but detects long noise as noise.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below. Embodiment 1. 1 is a schematic diagram of a mobile radio communication system according to Embodiment 1 of the present invention. In FIG. 1, a PBX (Private Branch eXchange) 1 is a private branch exchange independently installed by a company or the like. Each wireless base station (BS in FIG. 1) 2-1 to 2-6 communicates with the mobile terminal 3 in the wireless zone through a wireless line, and can cover the wireless communication area without any trouble. like,
It will be installed on each floor of the campus at regular intervals.

In the example shown in FIG. 1, each of the radio base stations 2-1 to 2-1.
2-6 are installed in a reception room, a large conference room and a factory on the first floor (1F), a small conference room, an office room and a machine room on the second floor (2F), respectively. In addition, zone 1 (reception room and small conference room) has low noise, zone 2 (large conference room and office room) has medium noise, and zone (factory and machine room) has high noise. And Figure 1
As shown in, each of the wireless base stations 2-1 to 2-6 is connected to the PBX 1. In addition, each wireless base station 2-
The wireless zones 1 to 2-6 are assumed to be in a relatively narrow range. The mobile terminal (PS in FIG. 1) 3 is a PHS (Pers
This is a mobile phone carried by a user such as an onal Handy phone System.

FIG. 2 is a block diagram showing the structure of the PBX. In FIG. 2, each BS interface unit 11-1
To 11-n are the radio base stations 2-1 to 2-n, respectively.
Which is an interface for connecting the wireless base stations 2-1.
~ 2-n communication control is performed. The time divisional switch 11 is a switch for exchanging data of time divisional time slots sent from the respective radio base stations 2-1 to 2-n to switch a communication path. The control unit 13 controls the PBX 1 as a whole, that is, each BS interface unit 11-1 to 11
-N and the operation of the time divisional switch 12 are controlled.

FIG. 3 is a block diagram showing the configuration of the mobile terminal. In FIG. 3, an antenna 301 is for transmitting and receiving radio signals to and from the radio base station 2. Radio section 302 demodulates the radio signal received by antenna 301 to extract it as a baseband digital signal, and outputs the extracted digital signal to signal processing section 303. The wireless unit 302 also modulates the digital signal output from the signal processing unit 303 into a wireless signal, and causes the antenna 301 to send the wireless signal to the wireless base station 2.

The signal processing unit 303 separates the digital signal output from the radio unit 302 into control information and call information, outputs the control information to the control unit 306, and converts the call information into a digital / analog signal to obtain a voice signal. Then, the voice signal is transmitted from the receiver 305. Further, the signal processing unit 303 performs analog / digital conversion of the voice signal received from the transmitter 304 into a digital signal, multiplexes the digital signal with the control information output from the control unit 306, and performs the wireless unit 302. Output to.

The control unit 306 performs data processing of the control information output from the signal processing unit 303, and controls the incoming call ringing unit 307 so that the incoming speaker 30
8 is activated and the motor control unit 309 is controlled to drive the vibrator 310. The control unit 306 also performs a display process on the display unit 311 and a detection process of a signal input from the key button unit 312.

FIG. 4 is a block diagram showing the structure of the radio base station. In FIG. 4, the control unit 20 controls the radio base station 2
Is to control the entire system. The antenna 21 is for transmitting and receiving radio signals to and from the mobile terminal 3. The antenna switching unit 22 switches the route to the transmission side or the reception side according to the control of the control unit 20. The reception signal amplifying unit 23 amplifies a rising radio signal received by the antenna 21 (a radio signal transmitted from the mobile terminal 3 side). The demodulation unit 24 demodulates the radio signal output from the reception signal amplification unit 23 into a baseband digital signal, separates the digital signal into control information and call information, and outputs the control information to the control unit 20. The call information is output to the line interface unit 25.

The line interface unit 25 is an interface for connecting the PBX 1, and outputs the call information output from the demodulation unit 24 to the PBX 1 and also the PBX 1
The telephone call information output from is input and output to the modulator 26. The modulator 26 receives the call information output from the line interface 25, multiplexes the call information with the control information output from the controller 20, and modulates the call information into a radio signal. The transmission signal amplification unit 27 amplifies the radio signal output from the modulation unit 26 and sends it to the mobile terminal 3 via the antenna 21.

The microphone 28 collects noise around the wireless base station 2. The signal processing unit 29 performs a detection process of a noise signal collected by the microphone 28 to convert the noise signal into a noise detection signal, and the noise detection signal is controlled by the control unit 2.
It outputs to 0.

Here, FIG. 5 shows a concrete configuration example of the signal processing unit 29. As shown in FIG. 5, the signal processing unit 29 includes a rectifier circuit including a differential amplifier, a diode, and a resistor,
It is configured by combining a time constant circuit composed of a resistor R and a capacitor C.

Next, the operation will be described. In each radio base station 2, ambient noise is constantly collected by the microphone 28, the collected noise signal is detected by the signal processing unit 29 and converted into a noise detection signal, and the noise detection signal is controlled by the control unit. Take in 20.

FIG. 6 is a graph for explaining the relationship between the noise signal and the noise detection signal. In the graph of FIG. 6, the vertical axis represents the noise level around the wireless base station 2, and the horizontal axis represents time. The solid line is the microphone 2
8 shows the noise signal collected, and the broken line (dotted line) shows the noise detection signal subjected to the detection processing by the signal processing unit 29.

As shown in FIG. 6, the signal processing unit 29 does not detect a relatively short instantaneous noise signal as a noise detection signal, but detects only a relatively long noise signal as a noise detection signal. This is because when the control unit 20 performs the noise detection signal processing, the noise generated instantaneously is ignored, and the signal processing can be performed by considering only the noise continuously generated for a long time.

Such noise signal detection processing is realized by the circuit shown in FIG. That is, the microphone 2
The noise signal (input signal) collected at 8 is converted into a DC voltage by the rectifier circuit. This DC voltage value has a magnitude proportional to the amplitude, which is the level of noise signal strength,
The capacitor C is charged through the resistor R. Here, by increasing the time constant of the resistor R and the capacitor C, the charging time of the capacitor C can be lengthened.
Therefore, when the noise detection signal (output signal), which is the voltage value of the capacitor C, becomes large as shown in FIG.
Impulsive noise signals that rise in a very slow time and are instantaneous are removed.

When the noise becomes smaller, the noise signal also becomes smaller and the DC voltage value generated in the rectifier circuit also decreases. When the DC voltage value decreases, the voltage charged up to now in the capacitor C is discharged through the diode D, and the noise detection signal (output signal) instantaneously decreases as shown in FIG.

When the control unit 20 takes in the noise detection signal, it performs signal processing of the noise detection signal. FIG. 7 is a graph for explaining the noise detection signal processing by the control unit. In the graph of FIG. 7, the solid line indicates the noise detection signal that has been subjected to detection processing by the signal processing unit 29. When the noise level of the noise detection signal exceeds the thresholds 1 and 2 for a predetermined time or more, the control unit 20 of the wireless base station 2
Noise level around the radio base station 2 is "medium" or "high"
It is determined that

In the example of FIG. 7, the control unit 20 controls the time (ΔT) when the noise level exceeds the threshold value 1 for determining the medium level.
The noise level is determined to be "medium" because the condition 1) has exceeded the specified time. Since the time (ΔT2) in which the noise level exceeds the threshold 2 for determining the high level has not elapsed for the specified time or longer, the control unit 20 sets the noise level to “high”.
Is not judged.

Next, the operation when the mobile terminal 3 receives an incoming call will be described. When there is an incoming call to the mobile terminal 3, the control unit 13 of the PBX 1 uses the location registration information of the mobile terminal 3 to request the incoming call request to the radio base station 2 existing in the radio zone. Then, the data of the incoming call request is sent out via the BS interface unit 11.

When the control unit 20 of the radio base station 2 receives the data of the incoming call request through the line interface unit 25, it confirms the result of the noise level determination by the noise detection signal described in FIG. The control unit 20 sets the "incoming ringing form value" of the incoming message according to the result of the noise level determination.

Here, FIG. 9 is a diagram showing the incoming call information format of the incoming call message. The incoming call information format of FIG. 9 is composed of 10-byte data (1 byte is 8 bits). The first byte is an "information element identifier" indicating an incoming call message, and the second byte is the data amount of the telephone number of the mobile terminal 3 after the third byte (for example, a 4-digit telephone number). "PS number content length" indicating that the 3rd to 9th bytes are
The telephone number (PS number) of the mobile terminal 3 that is the incoming call target is shown (the mobile terminal 3 can transmit up to 13 digits). The 10th byte is a “ring tone ringing form value” that indicates the ringing ring ring type type.

For example, as shown in FIG. 7, when the result of the noise level determination is "medium", the control unit 20 sets the ringing volume to the medium level in the "ringing mode value" of the incoming call message. Write the instruction data. The control unit 20, when setting the “incoming ringing form value” of the incoming call message, transmits the incoming call message to the mobile terminal 3 via the antenna 21.

FIG. 8 is a flow chart for explaining the operation of the incoming call ringing of the mobile terminal. When the control unit 306 of the mobile terminal 3 receives the incoming call message (incoming information) transmitted from the radio base station 2 via the antenna 301, the radio unit 302, and the signal processing unit 303 (step ST
1) Analyze the "ringing mode value" of the incoming message (step ST2).

The control section 306 judges whether or not all the 1-byte (8-bit) instruction data of the "ring tone form value" is 0 (step ST3), and if the 8-bit instruction data are all 0, , It is judged that it is a normal ringing. On the other hand, the control unit 306 determines that the vibrator incoming call is set if only the 8th bit of the 1-byte “ringing pattern value” instruction data is determined to be a vibrator incoming call. If the volume is high, only the third bit is 1, it is determined that the ringing volume is medium, and if only the second bit is 1, it is determined that the volume is low. If only the 1st bit is 1, it is determined that there is no ringing.

The control unit 306 controls the incoming call ringing unit 307 in accordance with the instruction data of the "incoming ringing form value" to force the incoming call speaker 308 to ring at an appropriate incoming call volume according to the surrounding environment, and , Motor control unit 30
The vibration motor 310 is forcibly driven by controlling 9.

It should be noted that the vibrator incoming call of "incoming ringing mode value" is set when the noise level around the radio base station 2 is very high, or conversely, when it is very low. Also,
No ringing of the "ringing ringing form value" is set when the user wants to simply confirm the position of the mobile terminal 3 without receiving the mobile terminal 3 as an incoming call.

As described above, according to the first embodiment, the incoming call type of the mobile terminal 3 can be forcibly determined according to the noise level around the radio base station 2.
The incoming call type can be automatically controlled according to the surrounding environment in which the mobile terminal 3 is used.

Embodiment 2. In the first embodiment, the microphone 28 is attached to the radio base station 2, the noise level of the surrounding environment of the radio base station 2 is measured, and the incoming call type by the mobile terminal 3 is determined according to the measured noise level. Although the mobile terminal 3 is configured to ring with the determined incoming call type, for example, the microphone 28 is not built in the wireless base station 2 but is built in the mobile terminal 3 so that the surroundings on the mobile terminal 3 side can be realized. The noise level may be detected, the type of ringing of the incoming call may be determined by the wireless base station 2 based on the detected noise level, and the mobile terminal 3 may ring by the determined type of incoming call.

In this case, as compared with the case of the first embodiment,
Since the noise level can be detected at a position close to the user of the mobile terminal, it is possible to further determine an appropriate incoming call type according to the surrounding environment of the user of the mobile terminal 3.

[0041]

[0042]

【The invention's effect】BookAccording to the inventionMobile wireless communication system
Is a mobile terminal that uses a microphone to
Measure the noise level of the surrounding environment,The measured noise level
Notify the wireless base stationToA mobile terminal
Call type by mobile terminal according to the noise level notified from
Decide another,Notify the mobile terminal of the determined incoming call type and transfer
Mobile terminal, the incoming call type notified from the wireless base station
On the basis ofRingSo,Depending on the surrounding environment of the mobile terminal
The effect that it is possible to determine an appropriate incoming call type
To do.

[0043]

[Brief description of drawings]

FIG. 1 is a schematic diagram of a mobile radio communication system according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a PBX.

FIG. 3 is a block diagram showing a configuration of a mobile terminal.

FIG. 4 is a block diagram showing a configuration of a wireless base station.

FIG. 5 is a circuit diagram showing a specific configuration example of a signal processing unit.

FIG. 6 is a graph diagram for explaining a relationship between a noise signal and a noise detection signal.

FIG. 7 is a graph diagram for explaining noise detection signal processing by the control unit.

FIG. 8 is a diagram for explaining the operation of ringing the incoming call of the mobile terminal .
It is a flowchart .

FIG. 9 is a diagram showing an incoming call information format .

[Explanation of symbols]

2 wireless base stations 3 mobile terminals 20 Control unit 28 microphones 29 Signal processing unit 306 control unit 307 Ringer 308 Incoming speaker 309 Motor control unit 310 vibe motor

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04M 1/00 H04Q 7/38

Claims (2)

(57) [Claims] 1. A radio base station installed in each room
In the mobile terminal used in a room, it measures the ambient noise level at the microphone, to inform the noise level measured in the radio base station, in the wireless base station, compares the noise level notified from the mobile terminal with the threshold value By having multiple levels
Level that includes noise level
Mobile terminal determines the incoming volume of ringing and notifies the mobile terminal in response to said at mobile terminal, an incoming ringing control for causing sounding the ringtone based on the ringtone volume notified from the radio base station Method. 2. It is connected to a private branch exchange and installed in each room.
A radio base station that is, used in the the room and the room radio base station is installed
A mobile wireless communication system including a mobile terminal configured to perform the noise level notification from the mobile terminal.
Out of multiple levels by comparing the bell with a threshold
The noise level is classified into one of
Depending on the ringing volume of the mobile terminal
The mobile terminal will notify the surrounding noise level with a microphone.
The measured noise level is reported to the wireless base station,
Ring tone based on the ring volume notified from the line base station
A mobile radio communication system characterized by being operated.