JPH0568151U - Wireless telephone - Google Patents

Abstract

(57) [Summary] [Purpose] The slave unit should immediately return to the position where the reception field strength is stable during a call by notifying the user just before falling into the reception field strength that issues an out-of-range warning. Avoid the hassle of not becoming. [Structure] When the reception electric field detection circuit (CD-1) detects that the reception electric field strength detected via the receiver (RX) 14 is lower than a threshold value equivalent to when the communication area leaves, the speaker 23 Out-of-range alarm is issued and the receiver (R
(X) The received electric field strength detected via (14) is lower than the threshold value just before leaving the coverage area, which is slightly lower than the threshold value when leaving the coverage area.
When D-2) 26 is detected, the handset 15 issues an out-of-service warning.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wireless telephone device having a master unit connected to a wired line and a slave unit connected to the master unit via a wireless line. The present invention relates to a radiotelephone device in which the strength of a received electric field is determined before a call is issued, and if necessary, for example, a warning out of range is superimposed on the voice of a handset.

[0002]

[Prior Art]

 This type of conventional radiotelephone device is constructed as shown in FIG. As shown in the figure, this wireless telephone device is roughly composed of a master unit 1 connected to a wired line 3 and a slave unit 2 connected to the master unit 1 via a wireless line. ing.

A signal sent from the wired line 3 is sent to a transmitter (TX) 5 through a hybrid circuit (H) 4 and serves as a modulation input of the transmitter (TX) 5. Then, the radio wave modulated by the transmitter (TX) 5 is wirelessly transmitted from the transmission antenna 6 to the slave (wireless telephone) 2.

On the other hand, the radio wave transmitted from the slave unit 2 is received by the receiving antenna 7, demodulated by the receiver (RX) 8 and then transmitted to the wired line 3 through the hybrid circuit (H) 4.

The synthesizer (SYN) 9 outputs a frequency corresponding to the wireless channel to the transmitter 5 and the receiver (RX) 8. One of the outputs of the receiver (RX) 8 is input to the reception electric field detection circuit (CD-1) 10 and the electric field strength is judged. This circuit is generally called a carrier squelch circuit or a noise squelch circuit.

Further, the other output of the receiver (RX) 8 is output as a data signal included in the received demodulated wave, and is an identification signal that matches an identification signal determined by the combination of the master unit 1 and the slave unit 2. It is input to the signal detection circuit (ID) 11 and collated. This identification signal is generally called an ID code.

The output of the received electric field detection circuit (CD-1) 10 and the demodulated output of the data signal are input to the control circuit (CONT) 12 and used for connection control. Further, the control circuit (CONT) 12 controls the synthesizer (SYN) 9 to perform radio channel control, and controls the transmitter (TX) 5 to send a transmission data signal as a modulation input. The functions of the synthesizer (SYN) 19 and the identification signal detection circuit (ID) 21 are the same as those of the master unit 1, and the control circuit (CONT) 22 controls the slave unit 2.

The output of the receiver (RX) 14 is input to the reception electric field detection circuit (CD-1) 20, and the electric field strength is determined. Then, this output is input to the control circuit 22 and used for connection control. Further, when the received electric field strength is lower than a predetermined value during the call, the fact is output to the control circuit 22. Then, the control circuit 22 receiving this outputs an out-of-range alarm signal to the speaker 23, and the out-of-range alarm is issued from the speaker 23. The speaker 23 functions not only as a speaker that issues the out-of-range alarm, but also as a sounder that emits a ringing sound when an incoming call arrives.

The call / end call combination key 24 is a key configured to input a call and end call command in sequence every time it is pressed. The dial key 25 is operated to input a telephone number, predetermined data and the like.

Next, with reference to the flowchart of FIG. 4, the general operation of the slave unit 2 of the wireless telephone device described above when the received electric field strength falls below a predetermined value during a call is described. explain.

As shown in the figure, when the cordless handset 2 is in a standby state (step 401), the control circuit (CONT) 22 determines whether or not the talk / end call combination key 24 is pressed ( Step 402).

As a result, when it is determined that the call / end call combination key 24 is not pressed (step 402 NO), the state returns to the standby state (step 401) again. If it is determined that the button has been pressed (YES in step 402), a message to that effect is wirelessly transmitted to the parent device 1, and then the call operation (step 403) is performed.

Next, during the call operation (step 403), the control circuit (CONT) 22 continues to monitor the detection output of the reception electric field detection circuit (CD-1) 20 (step 404).

As a result, the received electric field strength is not lower than a predetermined threshold value (specified value) equivalent to when the communication area leaves, and therefore, when “reception electric field decrease detection” is not performed (step (NO in step 404), and subsequently, it is determined whether the combined call / end call key 24 has been pressed (step 405).

As a result, if it is determined that the combined call / end call key 24 has not been pressed (NO in step 405), the call operation (step 403) is continued, and it is determined that the key has been pressed in reverse (step 403). (YES in step 405), after wirelessly transmitting the fact to the master unit 1, the call ending operation (step 406) is performed, and then the process returns to the standby state (step 401).

On the other hand, during the above-mentioned call operation (step 403), the control circuit (CONT) 22 monitors the detection output of the reception electric field detection circuit (CD-1) 20 (step 404), and the reception electric field is obtained. When the intensity of the signal falls below a predetermined threshold value (specified value) and "reception field drop detection" is performed (step 404 YES), the out-of-range alarm timer provided inside the control circuit 22 starts (step 407). ). Then, an out-of-range alarm is issued from the speaker 23 (step 408), the user is informed that it is out of the in-service area, and prompted to return to the in-service area. Even in this state, the control circuit 22 continues to monitor the detection output of the reception electric field detection circuit (CD-1) 20 (step 409).

As a result, when the received electric field strength is not lower than the predetermined threshold value (specified value) and is restored, that is, when the “received electric field decrease detection” is not performed (step 409 NO). The out-of-range alarm is stopped (step 401), and the operation returns to the call operation (step 403).

On the other hand, when the “reception electric field drop detection” is performed (YES in step 409), it is determined whether the out-of-range warning timer that has started earlier has timed out (step 411). As a result, when the time-out has not occurred (NO in step 411), the out-of-range alarm generation (step 408) is continued.

On the other hand, if the time-out has occurred (YES in step 411), the out-of-range alarm is stopped (step 412). Then, a strong cutoff signal is formed (step 413), and this strong cutoff signal is sent to the transmitter (TX) 17 as a modulation input of the transmission data signal, and finally becomes a radio wave from the transmission antenna 18 to the master unit 1. Is sent (step 414), and thereafter, the call ending operation (step 415) is performed, and the state returns to the standby state (step 401).

As described above, in the handset 2 in the conventional radiotelephone device, the reception electric field strength is predetermined at the time of departure from the coverage area as the user moves while making a call. If the value falls below the threshold value (specified value), the handset 2 issues an out-of-range alarm, notifies the user that the out-of-service area is approaching, and prompts the user to return to a position where the received electric field strength is stable. Be done.

However, in such a device, if the handset 2 issues an out-of-range alarm and then attempts to continue a call at a position where the out-of-range is approaching, the device will be forced to operate after a certain period of time. Sometimes the call is cut off before the other party is notified because there is a call ending operation, and if the other party makes a call due to a decrease in the received electric field strength of the handset 2. Even if the disconnection can be announced, if the call continues after that, the call is forcibly terminated, so the user hurriedly returns to the position where the received field strength is stable even during the call. There was a hassle of having to do it.

[0022]

[Problems to be solved by the device]

 As described above, in the handset of the conventional wireless telephone device, the strength of the received electric field is lower than a predetermined threshold value (specified value) as the user moves while making a call. If it drops, the handset issues an out-of-range alarm, notifies the user that the out-of-range is approaching, and prompts the user to return to a position where the received electric field strength is stable, but the handset issues an out-of-range alarm. However, if you try to continue the call at a position where the outside of the communication area is approaching, the call will be forcibly terminated after a certain period of time, so sometimes before you notify the other party. In addition to the fact that the call is suddenly cut off, even if the other party can be notified of that fact, if the call is continued after that, the end call operation will be forcibly performed, and the user will be terminated. Received in a hurry regardless of the call The field strength there has been a troublesome such as must return to the position that is stable.

The present invention eliminates the above-mentioned problems, and the handset notifies the user of the fact that the reception electric field strength of the out-of-range alarm will be issued shortly before the reception electric field strength is stabilized during a call in a hurry. It is an object of the present invention to provide a radiotelephone device capable of avoiding the annoyance of having to return to the position where it is.

[0024]

[Means for Solving the Problems]

 The present invention has a master unit connected to a wired line and a slave unit connected to the master unit via a wireless line, and the slave unit has a reception electric field for detecting a reception electric field strength in a call state. A detecting means, a receiving electric field comparing means for comparing the receiving electric field strength detected by the receiving electric field detecting means with a threshold value equivalent to when the communication area leaves, and a receiving electric field strength in the receiving electric field comparison means when the receiving electric field strength exists. In a radiotelephone device provided with an out-of-range alarm generating means for issuing an out-of-range alarm at least on the condition that it is determined to be lower than a considerable threshold value, the slave unit is further detected by the received electric field detecting means. Second received electric field comparing means for comparing the received electric field strength thus obtained with a predetermined second threshold value corresponding to the level before leaving the communication area, and the received electric field strength in the second received electric field comparing means It is configured by including the out-of-service withdrawal notice warning generating means for emitting out of service withdrawal notice warning as at least conditions that are determined to be lower than second threshold.

[0025]

[Action]

 According to the present invention, the out-of-range warning is issued at least on condition that the second received-field comparing means determines that the received electric field strength is lower than the threshold value just before the leaving of the service area. Be done. For this reason, the user can know that the out-of-range alarm is about to occur due to the warning out-of-range alarm, and therefore, even during a call, the user must hear the out-of-range alarm and quickly return to a position where the received electric field strength is stable. It is possible to avoid the annoyance of not becoming.

[0026]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram showing a main configuration of a wireless telephone device according to an embodiment of the present invention. Since the parent device 1 in the wireless telephone device of the present invention has the same configuration as the conventional device, only the configuration of the child device 2 is shown in FIG.

In FIG. 1, the handset 2 is newly provided with a second reception electric field detection circuit (CD-2) 26, and the other components are the reception antenna 13 and the reception antenna 13 as in the conventional case. Machine (RX) 14, handset 15, transmitter 16, transmitter (TX) 17, transmission antenna 18, synthesizer (SYN) 19, reception electric field detection circuit (CD-1) 20, identification signal detection circuit (ID ) 21, a control circuit (CONT) 22, a speaker 23, a communication / end-call key 24, and an input key 25.

In the child device 2 having such a configuration, the reception electric field detection circuit (CD-1) 20 is provided as in the conventional case, and the strength of the reception electric field during a call is a predetermined threshold value (corresponding to the time of leaving the communication area). If the value falls below the specified value), an out-of-range alarm will be issued. On the other hand, the slave unit 2 is different from the conventional one in that a second received electric field detection circuit (CD-2) 26 is newly provided.

As a result, there are two types of threshold values (prescribed values) for determining the strength of the received electric field during a call. The first type is used to determine whether or not to issue an out-of-range alarm as in the conventional case, while the second type is used. Is set in advance as a threshold value (specified value) just before the out-of-range warning is issued, and when it falls below this level during a call, it is used to determine whether or not the out-of-range warning is superimposed on the voice of the handset. It will be.

Hereinafter, the state of the control will be described in detail with reference to the flowchart of FIG. The difference between the flowchart of FIG. 2 and the flowchart of FIG. 4 lies in the detection of a decrease in the received electric field during the call operation (step 203). During the call operation (step 203), the control circuit (CONT) 22 monitors the detection output of the second reception field detection circuit (CD-2) 26 (step 204).

As a result, the received electric field strength is not lower than the predetermined threshold value (prescribed value) immediately before leaving the service area, which is slightly lower than the predetermined threshold value when leaving the service area. When the "reception electric field drop detection" is not performed (NO in step 204), the control circuit (CONT) 22 subsequently monitors the detection output of the reception electric field detection circuit (CD-1) 20 (step 205).

As a result, when the received electric field strength is not lower than the predetermined threshold value (specified value), and therefore the “received electric field decrease detection” is not performed (NO in step 205), the control circuit continues. The (CONT) 22 determines whether the combined call / end call key 24 has been pressed (step 206).

While the call / end call combination key 24 is not pressed (NO in step 206), the call operation (step 203) is maintained, but when it is pressed (YES in step 206), the call end operation (step 206) is immediately performed. 206) and returns to the original standby state (step 201).

On the other hand, during the above-described call operation (step 203), the control circuit (CONT) 22 causes the received electric field strength to be slightly lower than the threshold value equivalent to the time of leaving the coverage area. Value), and if "reception electric field drop detection" is performed (YES in step 204), an out-of-range alarm is superimposed on the voice generated from the handset 15 to notify the user as an out-of-range alarm. Then, the received electric field strength is monitored (step 208). If the "reception field drop detection" is not performed (step 208 NO), the reception field strength is further monitored (step 209). As a result, when the "reception electric field drop detection" is performed (YES in step 209), the operation from the warning out of the warning area (step 207) is repeated.

When the “reception electric field drop detection” is not performed (NO in step 209), the warning outside warning area superimposed on the voice generated from the handset 15 is stopped (step 210), and the call operation is performed again. Return to (step 203).

On the other hand, during the above-mentioned call operation (step 203), the control circuit (CONT) 22 has the received electric field strength lower than the predetermined threshold value (specified value), and therefore, “reception electric field low detection”. If the "outside service area alarm" is issued (step 207), or if "reception electric field drop detection" is also performed (step 208 YES), the out-of-service alarm timer provided inside the control circuit 22 is performed. Starts (step 211).

Then, the out-of-range alarm is issued from the speaker 23 (step 212), the user is notified that the out-of-range of the communication area is approaching, and the user is prompted to return to the position where the received electric field strength is stable. Even in this state, the control circuit 22 continues to monitor the detection output of the reception electric field detection circuit (CD-1) 20 (step 213).

As a result, when the strength of the received electric field is not lower than the predetermined threshold value (specified value) and is restored, that is, when the “received electric field decrease detection” is not performed (NO in step 213). ), The out-of-range alarm is stopped (step 214), and the operation returns to the call operation (step 203).

On the other hand, when the “reception electric field drop detection” is performed (YES in step 213), it is determined whether or not the out-of-range warning timer that has started earlier has timed out (step 215). As a result, if the time-out has not occurred (NO in step 215), the out-of-range alarm generation (step 212) is continued.

On the other hand, if the time-out has occurred (YES in step 215), the out-of-service alarm is stopped (step 216). Then, a strong cutoff signal is formed (step 217), and this strong cutoff signal is sent to the transmitter (TX) 17 as a modulation input of the transmission data signal, and finally becomes a radio wave from the transmission antenna 18 and the base unit 1 Is sent to (step 218), after which the call ending operation (step 219) is performed and then the state returns to the standby state (step 201).

According to the above-described embodiment, during the call, the user can know that the out-of-range alarm is being generated by the out-of-range warning that is superimposed on the voice of the handset 15. Nevertheless, it is possible to avoid the hassle of having to return to a position where the received electric field strength is stable in a hurry when an out-of-range warning is heard, and this type of wireless telephone device can be greatly improved in usability. it can.

[0042]

[Effect of the device]

 As explained above, according to the present invention, the second reception electric field comparison means determines that the reception electric field strength is lower than the threshold value just before the departure from the coverage area, at least on condition that the reception area is departed. An advance warning is issued. For this reason, the user can know that the out-of-range alarm is about to occur due to the advance notice of the out-of-range alarm.Thus, even during a call, the user hears the out-of-range alarm and immediately returns to the position where the received electric field strength is stable. It is possible to avoid the hassle of having to do this.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main configuration of a slave unit according to an embodiment of the present invention.

FIG. 2 is a flow chart showing an example of an out-of-range notice warning operation in the child device according to the embodiment of the present invention.

FIG. 3 is a block diagram showing the configuration of a slave unit in a conventional wireless telephone device of this type.

FIG. 4 is a flowchart showing an example of an out-of-range alarm generating operation in this conventional wireless telephone device.

[Explanation of symbols]

 1 Master unit 2 Slave unit 3 Wired telephone line 4 Hybrid circuit 5,17 Transmitter 6,18 Transmitting antenna 7,13 Receive antenna 8,14 Receiver 9,19 Synthesizer 10,20 Receive electric field detection circuit (for out-of-range alarm generation) 11, 21 Identification signal detection circuit 12, 22 Control circuit 15 Handset 16 Transmitter 23 Speaker 24 Call / end talk combination key 25 Input key 26 Received electric field detection circuit (for warning to leave the area)

Claims (1)

[Scope of utility model registration request] 1. A reception unit having a master unit connected to a wired line and a slave unit connected to the master unit via a wireless line, wherein the slave unit has a reception electric field for detecting a reception electric field strength in a call state. A detection means, a reception electric field comparison means for comparing the reception electric field strength detected by the reception electric field detection means with a threshold value equivalent to when the communication area is separated, and a reception electric field strength in the reception electric field comparison means, In a radiotelephone device provided with an out-of-range alarm generating means for issuing an out-of-range alarm on at least the condition that it is determined to be lower than a threshold value, the slave unit is further detected by the received electric field detection means. A second received electric field comparison means for comparing the received electric field strength with a predetermined second threshold value corresponding to the level before leaving the communication area; and the received electric field strength in the second received electric field comparison means is Radio telephone system than the threshold value, characterized by comprising the out-of-service withdrawal notice warning generating means for emitting out of service withdrawal notice warning as at least the condition that it is determined to be decreased.