JPS63233626A - Radio communication equipment - Google Patents

Abstract

PURPOSE:To exactly send a dial signal without generating a various kinds of undesirable effects, by providing a dial reception decision means which decides whether a bit of dial information sent from a mobile radio terminal is received at a master device exactly. CONSTITUTION:The titled device is the one in which the dial reception decision means A is provided, and it is decided whether the bit of dial information sent from the mobile radio terminal is received exactly at the master device. As a result, when dial data is not received exactly at the master device due to fading, etc., the fact is detected by the dial reception decision means A, therefore, it is possible to take a countermeasure for erroneous connection or no connection when the dial data is not received exactly. Therefore, it is not required to apply a large-scaled preventing means such as the increase of a transmission output or the repeat of the dial data for plural number of times while the dial data is received exactly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an improvement in a wireless communication device including a parent device and a mobile radio terminal, such as a cordless telephone device or a car telephone device.

(Prior Art) Conventionally, there are the following devices as this type of device. FIG. 15 shows its configuration. This device includes a parent device 2 connected to a subscriber line 1 as a wired line, and a wireless telephone 4 connected to the parent device 2 via a wireless line 3. The device is equipped with a transmitter (TX) 22 and a receiver (RX) 23 for specifying transmission/reception channels, and transmits call signals received from the other party's terminal via the subscriber line 1 during a call to a line relay 24. After passing through the hybrid circuit 25, the transmitter 22 modulates the signal and sends it out from the transmitting antenna 26 to the wireless line 3, and the wireless communication signal arriving from the wireless telephone 4 via the wireless line 3 is transmitted to the receiver via the receiving antenna 27. After demodulating at 23, the signal is sent to the subscriber line 1 via the hybrid circuit 25 and line relay 24. The parent device 2 also includes an incoming call detection circuit 28 that detects a 181{z ringing signal arriving from the exchange, and a received electric field detection circuit (C
-DET) 29 and identification signal detection circuit (ID-DET) 29 and identification signal detection circuit (ID-DET)
) 30, a control circuit (CONT) 31, and a dial signal generation circuit 33. Of these, the received electric field detection circuit 29 is comprised of a carrier squelch circuit or a noise squelch circuit, and monitors the arrival of radio waves from the radio telephone 4. The identification signal detection circuit 30 detects an identification signal (ID
code), and the verification results are sent to the control circuit 3.
Notify 1. The dial signal generation circuit 33 generates a dial signal consisting of, for example, a DTMF signal according to instructions from a control circuit 31, which will be described later, and sends this dial signal to the subscriber line 1. The control circuit 31 has, for example, a microcomputer as a main control section, and performs various connection controls. Note that 32 is a rectification and stabilization circuit that generates a predetermined operating voltage Vcc from the commercial power supply output (ACIOOV) and supplies this operating voltage Vcc to each circuit in the parent device 2.

On the other hand, the radio telephone 4 is equipped with a transmitter (TX) 42 and a receiver (RX) 43 whose transmission and reception channels are designated by a synthesizer (SYN) 41, similar to the above-mentioned parent device 2. The incoming radio call signal is received and demodulated by the receiver 43 via the receiving antenna 44 and then output as voice from the receiver 45, and the call signal input from the transmitter 46 is modulated by the transmitter 42 and then sent to the transmitting antenna 47. It is sent to the wireless line 3 via the . This wireless telephone 4 also includes a transmission switch 48, a dial key 49, a received electric field detection circuit (C-DET) 50, and an identification signal detection circuit (ID-DET) as circuits necessary for connection between the parent device 2 and the exchange. DET) 51, a control circuit (CONT) 52 which uses a microcomputer as a main control unit and performs various connection controls, and a sounder 53 which generates sound. Note that 54 is a battery for the wireless telephone 4.

By the way, when making a call from the wireless telephone a4 in such a device, the subscriber first turns on the call switch 48. Then, the wireless telephone 4 uses the control circuit 52 to instruct the synthesizer 41 to select a specific transmission/reception channel, thereby causing the transmitter 42 and the receiver 43 to operate continuously, and transmits an ID code and a transmission signal to the parent device 2.

On the other hand, when a radio wave arrives from the radio telephone 4, the parent device 2 detects it with a received electric field detection circuit 29, and verifies the ID code with an identification signal detection circuit 30. As a result of this verification 7, when it is recognized that it is a connection request to itself and the arrival of the transmission signal is confirmed, the control circuit 31 creates a transmission response signal and sends this signal to the transmitter 22 along with the instruction information of the transmission/reception channel. The information is then sent back to the wireless telephone 4, thereby causing the wireless telephone 84 to set a transmission/reception channel for telephone calls.

After this control, the line relay 24 is turned on to close the DC loop of the subscriber line 1.

Now, when the subscriber inputs the telephone number of the other party using the dial key 49 in this state, the radio telephone 4 creates dial data every time one digit of the telephone number is input. Here, this dial data is composed of, for example, a bit synchronization signal, a frame synchronization signal, a control signal indicating that it is dial data, and 4-bit dial number data, as shown in FIG. 16(a). And wireless telephone 4
Each time this one-digit dial data is created, it is sent from the transmitter 42 to the parent device 2, as shown in FIG. 16(b), for example. Note that the figure shows a case where a dial number "451111" is sent. On the other hand, when dial data arrives from the radio telephone 4, the master device 2 transmits, for example, DT to
It generates a dial signal consisting of an MF signal and sends this dial signal to subscriber Ill. A call is then made to the desired party, and if the called party responds, the wireless telephone 4 and the telephone of the called party are subsequently connected and a conversation is possible.

By the way, in general, in this type of device, if fading occurs while sending dial data from the wireless telephone 2 to the connection device t4, the dial data may not be correctly transmitted in the parent device 4 depending on the degree of decrease in the received electric field at that time. You may not be able to receive it. Sending a dialing signal to the subscriber line 1 in accordance with this uncertain dialing data causes erroneous connection or disconnection at the exchange, which is extremely undesirable.

For example, if the first digit dialed data is not received due to fading and the dialed number is dropped, the call will be connected to a completely different caller within the city even though the call is made outside the city. . In this case, if the person making the mistaken call is using a telephone, it will not be a big problem because the person who made the mistake will know that the call was made by telephone, but in the case of facsimile transmission, the person communicating with the other party cannot be known, so the facsimile data will be completely different. This is a serious problem because the message will be sent to the wrong terminal.

Therefore, in the past, for example, the transmission output of the wireless telephone 4 was increased to reduce the effect of fading, the dial signal length was set to a longer length, and the dial data was always sent out repeatedly multiple times to check the data against each other. This ensures that the correct dialing signal is sent to the subscriber line. However, with such conventional methods, the batteries are rapidly consumed and radio wave interference with other devices is likely to occur, and dial data transmission control becomes complicated and the connection time becomes extremely long. There wasn't.

(Problems to be Solved by the Invention) As described above, in order to reduce the effects of fading, etc., the conventional device simply uses a radio telephone without considering the reception status of dial data in the parent device. This method uses methods such as increasing the transmission output of the device and forwarding dial data unconditionally multiple times, which shortens battery life, increases interference with other devices, complicates control, and shortens connection time. However, the present invention focuses on this point and makes it possible to take measures to prevent erroneous connections or non-connections when dial data is not accurately received by the parent device. The present invention aims to provide a wireless communication device that can accurately send out dial signals without causing various problems.

[Structure of the Invention] (Means for Solving the Problems) The present invention comprises a parent device connected to a wired line and a mobile wireless terminal connected to the parent device via a wireless line. A wireless terminal is a wireless communication device that sends dial information consisting of a digital signal to a parent device when making a call.
As shown in FIG. 1, dial reception determining means A is provided, and this dial reception determining means A determines whether dial information sent from a mobile radio terminal has been accurately received by the parent device. be.

(Function) As a result, if the dial data is not accurately received by the parent device due to fading or the like, this will be detected by the dial reception determination means A, so only if the dial data is not received correctly will there be an error or no connection. It becomes possible to take preventive measures such as Therefore, when dial data is being received correctly, there is no need to take major preventive measures such as increasing transmission output or repeating dial data multiple times, which extends battery life and reduces radio wave interference. , it becomes possible to simplify the control of the device and shorten the connection time.

(Embodiment) FIG. 2 shows the configuration of a wireless communication device in a first embodiment of the present invention. In addition, in the same figure, the first
The same parts as in FIG. 5 are given the same reference numerals and detailed explanations will be omitted.

First, the radio telephone 40 is provided with a digit counter (K-COUNT) 55 for counting the digits of a dialed number. The digit counter 55 counts a count signal output from the control circuit 520 each time one digit of the dial number is input using the dial key 49. Then, each time this counting is performed, the counted value is output to the control circuit 520. The control circuit 520 also includes dial sending control means that performs a function for determining dial reception. This dial sending control means causes the digit counter 55 to count the digits of the dial number every time one digit of the dial number is input using the dial key 49, inputs the number of digits, and inputs the 5-bit number representing the number of digits. Dial data is created by inserting data (digit information) before dial number data as shown in FIG. Then, this dial data is transmitted from the transmitter 42 to the parent device 20.
Send to.

On the other hand, the parent device 20 includes a dial number digit detection circuit (K-
DET) 34 is provided. This digit detection circuit 34 has 1
Each time dial data for digits is received, the control circuit 31
It counts the digits of the dial number according to the instruction from 0 and outputs this digit information to the control circuit 310. The control circuit 310 also includes dial signal sending control means having a dial reception determination function. This dial signal sending control means causes the digit detection circuit 34 to count the number of received digits every time one digit of dial data is received, and converts this digit information into the digit information inserted into the received dial data. Verify. If the digit information on both sides match as a result of this comparison, the dial signal generation circuit 33 is directly driven to send a dial signal to the subscriber line 1, and on the other hand, if they do not match, the line switch 24 is opened at that point. The line will be disconnected.

Next, the control circuit 3 controls the operation of the device configured as described above.
This will be explained according to the control procedure of No. 10,520. The line relay 24 of the parent device 20 is closed in response to a call from the radio telephone 40, and when a dial tone arrives from the exchange, in this state, the control circuits 520 and 310 of the radio telephone 40 and the parent device 20 respectively operate as shown in FIG. As shown, in steps 4a and 4j, the count values N and M of the digit counter 55 and the digit detection circuit 34 are reset (N-0°M-
0) Do.

Then, the control circuit 520 of the radio telephone 40 monitors the dial operation in step 4b, and when the first dial number is input from the dial key 49 in this state, the control circuit 520 of the radio telephone 40 first instructs the count value N of the digit counter 55 in step 4c. is incremented, and then the dialed number is input in step 4d. Then, in step 4e, as shown in FIG. 3, dial data is created by adding the counted value N of the digit counter 55 (currently N-1 since it is the first fold) to the dial number data as digit information, and this dial data is It is sent from the transmitter 42 to the parent device 20. After transmitting the first digit dial data, the control circuit 520 determines whether the received electric field from the parent device 20 is weak or not in step 4f, and if there is a received electric field, returns to step 4b and returns to the second digit dial number. It waits for the input of , and if it is input, it creates dial data with digit information added in the same way as in the case of the first digit and sends it to the parent device 20 . Note that the digit information N inserted into this second digit dial data is N-2. Thereafter, similarly, digit information N (N-3, N, -4, . . . ) representing the number of digits is added to each of the dial data from the third digit onwards and sent to the parent device 20.

In contrast, the control circuit 310 of the parent device 20 performs step 4.
The arrival of dial data from the wireless telephone 40 is monitored in this state, and if dial data arrives in this state, step 41! The count value M of the digit detection circuit 34 is incremented in step 4m, and then, in step 4m, digit information N is extracted from the received dial data, and this received digit information N is converted into digit information that is the count value of the digit detection circuit 34. Verify with M in step 4n. If the double-fold information matches as a result of this comparison, it is determined that the dial data has been received correctly and the process moves to step 40, where a dial signal corresponding to the dial number inserted in the received dial data is sent. The dial signal is generated from the dial signal generation circuit 33, and the subscriber! Send to s1. When the transmission of the first digit dial signal is finished, the control circuit 310 returns to step 4k to receive the second digit dial data, and if this dial data is received, it is inserted into this data. Next, the digit information N-2 is compared with the count value M-2 of the digit detection circuit 34, and if they match, the dial signal generation circuit 33 generates a dial signal corresponding to the dial number inserted in the dial data. It is sent to subscriber line 1. Thereafter, send a dial signal for one digit to subscriber line 1 in the same way.
Each time the next dial data is sent to the next dial data, the next dial data is received and its digit information is checked. If the digit information N and M match, it is determined that the dial data of this digit has been correctly received, and a dial signal is sent.

By the way, if fading occurs and as a result, for example, the third digit dial data is not received, the count value M of the digit detection circuit 34 of the parent device 20 will not be incremented and will remain M2. Therefore, when the next fourth digit dial data is received, the digit information N-4 inserted in this dial data is the count value M incremented from M-2 by the digit detection circuit 34.
-3, and as a result, the two-fold information is determined to be inconsistent. Then, the control circuit 310 moves from step 4n to step 4p and opens the line relay 24, thereby releasing the capture of the subscriber line 1. Therefore, the exchange determines that the call has been abandoned at that point and returns to the standby state. Therefore, erroneous connections can be prevented. Further, the control circuit 310 of the parent device 20
When the above-mentioned line relay 24 has been opened, step 4q
Then, the operation of the transmitter 21 is stopped, thereby cutting off the transmitted radio waves. Then, when the control circuit 520 of the wireless telephone 40 detects the interruption of the transmission radio waves in step 4f, it proceeds to step 4g and generates an alarm, and in step 4h it stops the operation of the transmitter 42 and transmits the radio waves. Then, in step 41, a predetermined initialization process is performed and the process returns to the standby state. The above-mentioned alarm may be generated by emitting a sound from the sounder 53, for example, and if a liquid crystal display or the like is also provided, a message indicating that the dial data cannot be transmitted is displayed on this display. You may also do so.

In this embodiment, it is determined whether or not the dial data sent from the wireless telephone 40 is correctly received.
Since the determination is made one by one, if the reception is not correct, the line relay 24 can be immediately opened to disconnect the line. Therefore, the occurrence of erroneous connection or disconnection due to dial data not being correctly received due to fading or the like is reliably prevented. In addition, in the case of this embodiment, it is only necessary to add 5-bit digit information to the dial data and check the digit information in the parent device 20, so the connection time is not particularly long and the output of the transmitted radio wave is reduced. Since there is no need to increase the battery life, it is possible to extend the battery life and reduce radio wave interference with other devices.

On the other hand, FIG. 5 shows the configuration of a wireless communication device according to a second embodiment of the present invention, and the same parts as in FIG. 2 are given the same reference numerals. The device of this embodiment has a redial function, and the radio telephone 40' is provided with a redial key 56 and a dial memory 57, and the parent device 20' is provided with a dial memory 35 for redialing. It is.

In such a configuration, when the subscriber operates the redial key 56 of the wireless telephone 40' while the subscriber line 1 is captured by operating the call key 48, the control circuit 521 detects this operation in step 6C. and step 6
d, first the number of digits of the dial number stored in the dial memory 57 is determined and the number N of digits is sent to the parent device 20' as digit information. Next, step 6
At e, the dial number is read from the dial memory 57, and dial data is created for each digit of the dial number and sequentially sent to the parent device 20'.

In contrast, the control circuit 311 of the parent device 20' monitors the arrival of digit information and dial data in step 6 and step 6m, respectively, and if digit information is received in this state, it determines that the mode is redial. Then step 6j! The received digit information N is temporarily stored in step 6m, and then reception of dial data is monitored in step 6m. Then, when the dial data is received, step 6n
Then, the digit detection circuit 34 counts the number of digits of the dial data, and temporarily stores the dial number inserted in the received dial data in the dial memory 35. Then, in step 6p, the previously received digit information N and the number of digits of the dial data counted by the digit detection circuit 34 are compared with M, and if the double-fold information matches, it means that all digits of the dial data have been correctly received. It is determined that the dial numbers are read out digit by digit from the dial memory 35, and dial signals corresponding to these dial numbers are generated from the dial signal generation circuit 33 and sent to the subscriber line 1. let In this way, a call is made by redialing.

By the way, if it is determined that the double-fold information does not match as a result of checking the digit information in step 6p, the control circuit 311 determines that there is a digit that could not be received, and proceeds to step 6r. After waiting for a certain period of time t1 in step 6r, the line relay 24 is opened in step 6S, and the operation of the transmitter 21 is stopped in step 6t to cut off the transmission radio wave, and then initialization processing is performed in step 6u. Return to standby state. On the other hand, at this time, the control circuit 521 of the wireless telephone 40' detects the disconnection of the received electric field from the parent device 20' in step 6f, moves to step 6g, generates an alarm, and then transmits the electric field in step 6h. is disconnected, and returns to the standby state in step 61.

Therefore, in this embodiment, even in the case of redialing in which each digit of the dial number is read out from the dial memory 57 and sent out continuously, the number of digits is checked to determine whether the dial data has been received without exception for all digits. If the signal is not received correctly, the line relay 24 is opened at that point to prevent incorrect connection or disconnection by the exchange.

In the above explanation, all digits of the dial number are temporarily stored in the dial memory 35 in the parent device 20', and then read out and the dial signal is sent out. Dial memory 3
The dial signal may be sent out without being stored in 5.

FIG. 7 shows the configuration of a wireless communication device in a third embodiment of the present invention. This device uses the 5END method as a dial data transmission method.

This 5END method is used, for example, in car telephone devices, and each digit of the dialed number is temporarily stored in the memory, and when all digits are input, the 5END method is used.
When the D key is operated, each dial number is read from the memory, dial data is created for each digit, and these dial data and a 5END signal are sent out at regular intervals.

The radio telephone 40' is provided with a 5END key 59 for implementing the 5END method, a dial memory 57, and a display (LCD) 58 for displaying dialed numbers.
The control circuit 522 also includes dial sending control means for sending out dial data using the 5END method. On the other hand, the control circuit 312 of the parent device 20' includes a dial reception determining means that determines whether the dial data reception state is good or bad by utilizing the fact that the dial data is sent at regular intervals.

In this configuration, the control circuit 522 of the radio telephone 40' monitors the input of the dial number in step 8a as shown in FIG. When the dial number is input, the dial number is displayed on the display 58 in step 8b and stored in the dial memory 57 in step 8c. Then, in step 8d, the operation of the 5END key 59 is monitored, and when the subscriber operates the 5END key 59 after inputting all digits of the dial number, the control circuit 522
The process moves from step 8d to step 8e, where the dial number is read from the dial memory 57, dial data is created for each digit, and these dial data are sequentially sent to the parent device 20' at regular time intervals t2. .

After the transmission of the dial data is completed, the above-mentioned fixed time t2
After the elapse of time, a 5END signal is sent out in step 8f.

On the other hand, the control circuit 312 of the parent device 20' performs step 8j? after the transmission. In this state, when the first digit dial data from the wireless telephone 40' is received, the dial number inserted in this dial data is extracted in step 8m and stored in the dial memory. 35 to be memorized. Further, when the control circuit 312 finishes storing the first digit dial number, step 8
While monitoring the passage of time for a certain period of time t2 at s, signal reception is monitored at step 8n, and if a signal is received within the certain period of time t2, it is determined that the dial data has been received correctly and the process moves to step 8o. , here it is determined whether or not it is dial data.

Then, if it is dial data, the process returns to step 8m and the dial number, that is, the second digit dial number is stored in the dial memory 35. Thereafter, in the same way, each time a dial number is stored in the dial memory 35, it is determined whether the next digit of dial data is received within a certain time t2, and if it is received, it is inserted into this received dial data. The dial number is stored in the dial memory 35. The dial number for all digits is then stored in the dial memory 35, and finally, when the 5END signal is received, this is detected in step 8q and the process moves to step 8r. The numbers are read in order from the first digit, a corresponding dial signal is generated from the dial signal generating circuit 33, and this dial signal is sent to the subscriber line 1. In this way, dialing signals are sent out using the 5END method.

By the way, if, for example, fading occurs during the dial data receiving operation and some digits are not received due to this, the control circuit 312 determines that the dial data has not been correctly received after a certain period of time t2 has elapsed. First, the line switch 24 is opened, and then the process moves to step 8t, where an alarm is sent to the radio telephone 40'. Then, in step 8u, the transmitting radio wave is cut off, and in step 8v, the device returns to the standby state.

On the other hand, the control section 522 of the radiotelephone 40' is 5
After sending out the END signal, the presence or absence of alarm reception is monitored in step 8g, and when an alarm is received, the process moves to step 8h, where the transmitted radio waves are cut off, and an alarm is generated in step 81. Then, in step 8j, the process proceeds to step 8h. Return to standby state. Here, as the above-mentioned alarm, for example, a sound is generated from the sounder 53 and, for example, the display 58
Displays the message "Dial information available" on the screen.

In such an embodiment, 5E is used as the dial sending method.
When the ND method is used, focusing on the fact that this method sends each digit of dial data at regular intervals t2, monitor whether the dial data is received at regular intervals t2 at the parent device 20'. Since the reception state of the dial data is determined by this, the wireless telephone 40' does not send any information for reception determination such as digit information, and the parent device 20' can check whether or not the dial data has been correctly received. can be determined. Therefore, the wireless telephone 40' does not need to increase its transmission power or repeatedly transmit dial data multiple times, thereby reducing battery life or causing radio wave interference with other devices.
Furthermore, simple control can reliably prevent erroneous connections and non-connections.

In addition, in the third embodiment, 5 is added at the end of all dial data.
Although the END signal is sent out, the 5END signal may also be sent out before the first digit dial data is sent out. In this way, even if the first digit dial data is not received, this omission can be detected and a more accurate reception judgment can be made.

Next, a fourth embodiment of the present invention will be described.

In this embodiment, when digit information is attached to each digit of dial data and transmitted as in the first embodiment, only the digit information in the dial data is not received or is received in error. It provides relief measures in case of

FIG. 9 shows the control procedure of each control circuit in this case, and the procedure on the radio telephone side is the same as that of FIG. 4 above. The control circuit 310 of the parent device resets the count value M of the finger detection circuit 34 after the transmission (step 9k), and at the same time
Clear the value of register L (L-0) with j. Each time each digit of the dial data is received, the digit information N inserted in the dial data is compared with the count value M of the digit detection circuit 34 (step 9o), and if they match, the process proceeds to step 9p. Then, in step 9q, a dial signal corresponding to the dial number inserted in the dial data is sent to the subscriber line 1.

On the other hand, if the result of comparing the received digit information N and the count value M of the digit detection circuit 34 is that the two values do not match, the control circuit 310 does not open the line relay 24 yet and steps 9r. If the result of this determination is not L-1, it is determined that the dial data may have been received correctly, and in step 9s, the dial data is L-1.
After setting the value to -1, the process moves to step 9q, where a dial signal is sent. On the other hand, in step 9r above, L
-1, it is determined that the dial data has not been received correctly, and the process moves to step 9t, where the line relay 24 is opened to set the line to [r, and in step 9u, the transmitting radio wave is cut off, and the process proceeds to step 9t. Returns to standby state at 9v.

With such a configuration, even if the second digit information N is received incorrectly due to fading, etc., if the third digit information N is correctly received, the dial data will be recognized as correctly received. The dial signal is sent to the subscriber line 1 as is.

On the other hand, if the digit information N does not match M for two consecutive digits, it is determined that there is a high possibility that the dial data was not received, and the line is released.

Incidentally, in each of the embodiments described above, reception of dial data is determined and if the dial data is not received correctly, the line is disconnected and the system returns to standby mode.However, the dial data is retransmitted. It's okay.

For example, in the device shown in FIG. 7, if the parent device 20' does not receive any dial data for a given digit even after a certain period of time t2 has elapsed, then the control! The j circuit 312 detects this in step 10p as shown in FIG.
The process moves to step q, where the line relay 24 is first opened, and then the line relay 24 is closed again after a predetermined time (for example, 3 seconds) in step 10r. and step 1
At 0s, a retransmission request signal is sent to the wireless telephone 40'. In contrast, the control circuit 522 of the wireless telephone 40'
After sending out the 5END signal, the arrival of a retransmission request signal is monitored in step 10g, and when a retransmission request signal arrives from the parent device 20'', the process returns to step 10e, where each digit of the dial stored in the dial memory 57 is The numbers are read out to create dial data, and these dial data are sequentially sent to the parent device 20' at regular time intervals t2.

In this way, the parent device 20' can judge the reception of the dial data, and only if it is not received correctly, can a retransmission request be made and the dial data can be retransmitted from the wireless telephone 40'. If the condition is good, no retransmission is performed, so connection control is short-term. Further, once the subscriber performs the dialing operation, there is no need to perform the dialing operation again even if the condition of the wireless line 3 deteriorates, thereby improving operability.

Further, for example, when retransmitting dial data in FIG. 2, the parent device 20 and the wireless telephone 40 operate as follows. That is, each time one digit of dial data is received, the control circuit 310 of the parent device 20 temporarily stores the dial number in the dial memory in step l1m, and stores the digit information N inserted in the dial data in step ln. is compared with the count value M of the digit detection circuit 34, and if they match, the process moves to step lls, where a dial signal corresponding to the dial number stored in the memory is sent to the subscriber line 1.

On the other hand, if one digit of the dial data is not received due to fading, and as a result, the digit information N and M become inconsistent, the control circuit 310 performs step lln.
Then, the process moves to step llo, where it is first determined whether the dial data for which this digit information does not match is the one for which a retransmission request has been made, and if it is not the one for which a retransmission request has been made, the process moves to step llt. A retransmission request signal for the M-th digit is sent to the wireless telephone 40. On the other hand, the control circuit 520 of the radio telephone 40 detects the arrival of a retransmission request signal from the parent device 20 in step lie every time one digit of dial data is sent.

When a retransmission request signal is received in this state, the control circuit 52
0 reads the requested M-digit dial number from the dial memory 57 in step llh, creates dial data, and sends it to the parent device 20. In this case, the above M is inserted as the digit information.

When the dial data is retransmitted from the radio telephone 40, the control circuit 310 of the parent device 20 moves from step 110 to step 11p, where it sends a dial signal corresponding to the dial number inserted in the dial data. The signal is generated and sent to the subscriber line 1. After sending the dialing signal corresponding to this retransmitted dialed number,
In step llq, it is determined whether or not the dial number with digit information N+1 is stored in the dial memory 35. If it is stored, the value of digit information N is incremented in step llr, and then the process moves to step 118, where the dial number is A dial signal of the dial number corresponding to the digit information N stored in the memory 35 is sent to the subscriber line 1.

With such a configuration, for example, when a subscriber enters the dial number "451111" as shown in FIG. 12(a), the second digit dial data will be changed due to fading as shown in FIG. 12(b). If the parent device 20 does not receive the dial data, the parent device 20 sends a retransmission request signal to the radio telephone 40 as shown in (C) after receiving the third digit dial data. Then, the radio telephone 40 receives this retransmission request and retransmits the second digit dial data as shown in (a), and then sequentially transmits the fourth digit dial data. On the other hand, the parent device 20 is a wireless telephone 4
When the dial data requested to be retransmitted is sent from 0, a dial signal is sent to the subscriber line 1 as shown in (d) according to the dial number of this dial data, and then temporarily stored in the dial memory 35. Sends a dialing signal for the third digit dialed number. Thereafter, every time dial data is received, a dial signal for moving to the fourth digit is sent to the subscriber line 1 as shown in (d).

Therefore, with this embodiment, it is possible to retransmit the dial data only as many digits as necessary, and as a result, the connection time when retransmission is performed can be significantly shortened compared to the case where all digits are retransmitted. .

In addition, a retransmission request is not only made every time a digit is missing in the dial data, but also a request is made for the missing digit to be sent to iC! After all digits of the dial data have been received, the retransmission request may be made all at once. This is particularly effective in the case of the 5END method mentioned above.

Furthermore, if a retransmission request is made while the line is captured as described above, it takes time to send out the last digit of the dial signal, and there is a risk that the exchange will consider the call to have been abandoned. However, in this regard, for example, if retransmission is performed a predetermined number of times or more, the line may be temporarily opened, and then the line relay 24 may be closed again to transmit the dial signal again starting from the first digit.

Although each example has been explained above,
The present invention is not limited to the above embodiments. For example, the digit information to be inserted into dial data is 1, 0, 1,
0. It may also be expressed by repeating... In this way, the digit information to be inserted into the dial data can be reduced to 1 bit as shown in FIG. 13, thereby making it possible to shorten the length of the dial data. In addition, in the parent device, 1F notation 1, 0, 1 is sent as digit information for each digit.
Since it is sufficient to monitor the repetition of ゜Ol..., the digit detection circuit can be constructed with one flip-flop, thereby simplifying the circuit configuration.

However, with this method, it cannot be detected unless two consecutive digits of dial data are received, but in general mobile communication systems such as car telephones, it is extremely rare for two consecutive digits of dial data to be missed. Therefore, there is no particular drawback in practical use. Also, if this drawback becomes a problem, for example, digit information can be changed to 1.2.1, 2. Repeating ... and 1, 2 degrees 3. 1, 2, 3. You can set it to repeat...

Furthermore, the digit information may be rearranged at random as shown in FIG. 14 and sent all at once, and the parent device may rearrange the dial numbers in the order in which the digit information is arranged. In this way, the dialed number can be scrambled, and even if the wireless line is intercepted by a third party,
The dial number of the communication partner can be made difficult to understand. Note that FIG. 14 shows a case where a dial number "45-1111" is sent.

In addition, the configuration of the dial reception determination means, the control procedure and control content of each control circuit of the parent device and mobile radio terminal, the type of wireless communication device, etc. may be modified in various ways without departing from the gist of the present invention. .

[Effects of the Invention] As detailed above, according to the present invention, a dial reception determining means is provided, and the dial reception determining means determines whether dial information sent from a mobile radio terminal has been accurately received by the parent device. By determining whether the dial data is received correctly by the parent device, it is possible to take measures to prevent erroneous connections or non-connections when the dial data is not received accurately by the parent device. A wireless communication device capable of transmitting signals can be provided.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram showing the configuration of the wireless communication device of the present invention, FIG. 2 is a circuit block diagram showing the configuration of the wireless communication device in the first embodiment of the present invention, and FIG. 3 is a functional block diagram showing the configuration of the wireless communication device according to the first embodiment of the present invention. FIG. 4 is a flowchart showing the control procedure and control contents of the control circuit of the device; FIG. 5 is a circuit block diagram showing the configuration of the wireless communication device according to the second embodiment of the present invention. , FIG. 6 is a flowchart showing the control procedure and control contents of the control circuit of the device,
FIG. 7 is a circuit block diagram showing the configuration of a wireless communication device according to a third embodiment of the present invention, FIG. 8 is a flowchart showing the control procedure and control contents of the control circuit of the same device, and FIG.
11 are flowcharts showing the control procedure and control contents of the control circuit of the wireless communication device in other different embodiments of the present invention, and FIG. 12 shows the state of signal transmission and reception by the control shown in FIG. 11. 13 and 14 are signal configuration diagrams for explaining the present invention in detail, FIG. 15 is a circuit block diagram showing the configuration of a conventional wireless communication device, and FIG. 16(a), (b) is a diagram showing the signal structure and transmission timing of dial data used in the same device. A... Dial reception determination means, 1... Subscriber line, 3
...Radio line, 20.20', 20''...Main device, 40.40', 40'...Wireless telephone, 21.41
...Synthesizer, 22.42...Transmitter, 23,
43...Receiver, 24...Line relay, 25 Hybrid circuit, 26.47...Transmission antenna, 27.
44... Receiving antenna, 28... Incoming call detection circuit, 2
9゜50... Received electric field detection circuit, 30.51... Identification signal detection circuit, 310, 311, 312... Control circuit of parent device, 32... Rectification stabilization circuit, 33... Dial Signal generation circuit, 34... Digit detection circuit, 35.5
7...Dial memory, 45...Telephone receiver, 46...
- Transmitter, 48... Call switch, 49... Dial key, 520, 521, 522... Radio telephone control circuit, 53... Sounder, 54... Battery, 5
5... Digit counter, 56... Redial key, 58
...Display, 59...5END key. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 2 Figure 3 Figure 10 Figure 11

Claims (7)

[Claims] (1) Consisting of a parent device connected to a wired line and a mobile radio terminal connected to the parent device via a wireless line, the mobile radio terminal sends dial information consisting of digital signals to the parent device when making a call. What is claimed is: 1. A wireless communication device for transmitting dial information, comprising dial reception determining means for determining whether dial information transmitted from the mobile wireless terminal has been accurately received by a parent device. (2) The dial reception determination means adds information indicating the digits of the dial number to the dial information sent from the mobile radio terminal, and when the dial information is received by the parent device, the digits added to the dial information are The wireless communication device according to claim 1, wherein the wireless communication device determines from information whether dial information has been accurately received. (3) When the mobile radio terminal transmits each digit of dial information at regular intervals, the dial reception determination means dials by monitoring whether or not each digit is received at regular intervals in the parent device. The wireless communication device according to claim (1), which determines whether information has been accurately received. (4) The dial reception determination means sets the digit information to be added to the dial information to information having a predetermined regularity, and when the dial information is received by the parent device, the digit information added to the dial information is 2. The wireless communication device according to claim 2, wherein it is determined whether dial information is accurately received or not based on whether regularity is maintained. (5) The dial reception determination means determines whether the dial information is accurate even if part of the regularity of the digit information added to the received dial information changes, if the dial information of that digit is received. The wireless communication device according to claim (4), which determines that the wireless communication device has been received. (6) The dial reception determination means makes a request for retransmission of the dial information from the parent device to the mobile radio terminal when it is determined that the dial information has not been accurately received, and when the mobile radio terminal receives the retransmission request, the dial reception determination means Claim No. (1) is to read out from memory and retransmit.
The wireless communication device according to any one of Items to Items (5). (7) The dial reception determining means makes a retransmission request only for the digits of the dial information that were not accurately received, reads out the dial information of the digit for which the retransmission request was made in the mobile radio terminal from the memory, and sends it to the parent device. A wireless communication device according to claim (6).