JP2752994B2 - Wireless telephone equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a radio telephone device.

(Prior Art) Conventionally, as a multi-channel access type radio telephone device for detecting an empty radio channel among a plurality of radio channels and transmitting and receiving voices and the like, one having a configuration as shown in FIG. 2 is known. ing.

In FIG. 2, a parent device 1 is connected to a wireless telephone 2 via a wireless line, and is also connected to a wired telephone line 3.

The signal sent from the wired telephone line 3 is used as a modulation input of the transmitter 6 via the line switch 4 and the hybrid circuit 5. The transmission radio wave modulated by the transmitter 6 is transmitted to the wireless telephone 2 by the antenna 7.

On the other hand, the radio wave transmitted from the wireless telephone 2 is received by the receiving antenna 8 and demodulated by the receiver 9. The demodulated signal is transmitted to the wired telephone line 3 via the hybrid circuit 5 and the line switch 4.

The synthesizer 10 transmits a signal of a frequency corresponding to a radio channel (a communication channel and a control channel) to the transmitter 6.
And output to the receiver 9.

One of the outputs of the receiver 9 is input to the reception electric field detection circuit 11 and is used for determining the electric field strength. This circuit 11 is generally called a carrier squelch circuit or a noise squelch circuit. Another demodulated output is output as a data signal included in the received demodulated wave, and is input to an identification signal detection circuit 12 that checks an identification signal determined by a combination of the parent device 1 and the wireless telephone 2. This identification signal is generally called an ID code.

The outputs of the detection circuits 11 and 12 and the demodulated output of the data signal are input to the control circuit 13 and used for connection control.
The control circuit 13 controls the switching of the radio channel by controlling the synthesizer 10, and controls the transmission of a transmission data signal to the transmitter 6 as a modulation input.

On the other hand, the wireless telephone 2 is also provided with a receiving antenna 15 and a receiver 16, and the demodulated output of the receiver 16 is
Output to 7. The voice input from the transmitter 18 becomes a modulation input of the transmitter 19 and is transmitted by the transmission antenna 13.

Synthesizer 21, received electric field detection circuit 22, and identification signal detection circuit 23 are the same as those in parent device 1, and control circuit 24 controls radio telephone 2. The speaker 25 is a sounder that emits a ringing tone when receiving a call.

The memory 14 in the parent device 1 stores information such as abbreviated dial numbers and the like.
Reference numeral 26 is for returning information such as speed dial numbers registered in the memory 14 and displaying the information to confirm this.
Reference numeral 27 denotes a key unit provided with various keys for registering a speed dial number or the like and performing a hold operation of the wired telephone line 3.

However, the general control at the time of incoming call in this conventional example is performed as follows.

When detecting a call signal from wired telephone line 3 during standby, master device 1 sets the oscillation frequency of synthesizer 10 to the control channel frequency, turns on transmitter 6 and transmits an incoming signal. In this case, the incoming signal includes a communication channel (S-CH) designation signal.

On the other hand, the radiotelephone 2 turns on the synthesizer 21 for a certain time during standby, sets its oscillation frequency to the control channel frequency, and turns on the receiver 19. At this time, when an incoming signal is received, the transmitter 19 is turned on,
It sends out an incoming call response signal including the ID code assigned to itself, and the communication channel (S-CH) designated by the parent device 1.
Switch to

When the reception electric field detection circuit 11 detects a radio wave from the wireless telephone 2, the parent device 1 stops sending the incoming signal. next,
When the ID codes included in the incoming call response signal match, switching to the S-CH specified by the incoming signal is made. Here, if the ID codes do not match, it is a response from another set of wireless telephones, and the process returns to standby after waiting for the call from the wired telephone line 3 to disappear.

After switching to S-CH, parent device 1 sends a bell ringing signal. Upon receiving this, the wireless telephone 2 sends a ringing tone from the sounder 25. Then, in response to this, when an off-hook operation is performed by turning on a call switch (not shown), the wireless telephone 2 sends an off-hook signal to enter a call state.

On the other hand, upon receiving the off-hook signal, master device 1 stops transmitting the bell ringing signal, closes line relay 4 and forms a call loop with wired telephone line 3 to enter a call state.

On the other hand, the operation when calling from the wireless telephone 2 is as shown in the sequence of FIG. That is, when a call switch (not shown) is turned on to make a call to the wired telephone line 3 and off-hook, the control circuit 24 determines that the call operation should be started because the call switch is turned on. Then, after locking the oscillation frequency of the synthesizer 21 to the control channel, the receiver 16 is turned on to receive the radio wave on the control channel (C-CH). Then, the electric field strength of the receiving telephone on the control channel is detected by the detection signal of the receiving electric field detecting circuit 22, and if there is no receiving electric field strength exceeding a certain value, it is determined that the control channel is empty, and the transmitter 19 is turned on. To transmit a call signal including an ID code assigned to itself (S30). On the other hand, parent device 1
Is monitoring for incoming calls on the control channel,
When a call signal from the wireless telephone 2 is received, the ID
It is determined whether or not the code matches the ID code assigned to the combination with the wireless telephone 2, and if they match, the transmitter 6 is turned on and a call response signal ( ID code and S-CH designation information) (S31).

The radiotelephone 2 receives the call response signal from the parent device 1 on the control channel, detects whether or not the ID code included therein matches its own ID code. The oscillation frequency of 21 is switched to the frequency of the communication channel specified by the master device 1. On the other hand, parent device 1
After transmitting the response signal, the frequency of the synthesizer 10 is switched to the frequency of the communication channel designated for the communication. After switching to the communication channel in this way, the parent device 1 and the wireless telephone 2 confirm that the switched communication channel is unused by the reception electric field strength, and the reception electric field having a certain value or more over a certain period of time or more. If there is, it is determined that the channel is already in use, and the state returns to the standby state when the time-out condition is satisfied. However, if it is an unused communication channel, after transmitting the channel switching completion signal (S32), the audio circuit of the transmitter 6 is turned on to enter the communication state. On the other hand, the parent device 1 turns on the audio circuit of the transmitter 6 by receiving the channel switching completion signal (S33). Thereby, the parent device 1
And the wireless telephone 2 are connected via the communication channel designated by the parent device 1, and the telephone connected to the wired telephone line 3 is not called by the subsequent dial operation using the key unit 27 (not shown), and the telephone is in a call state. Can be

Then, when the call ends and the on-hook operation is performed, the wireless telephone 2 transmits a call end signal and then disconnects the wireless line (call channel) (S34).

On the other hand, in order to confirm the speed dial number registered in the memory 14 in advance, after operating the key "abbreviated" provided in the key unit 27, the key code of the speed dial number is changed to the numerical key of the key unit 27. , Signals of these keys are transmitted to the parent device 1. Then, the parent device 1 searches the memory 14 for a speed dial number corresponding to the received key code, and returns it to the wireless telephone 2. The returned speed dial number is displayed on the display 26. When the speed dial number is confirmed by this display and an on-hook operation is performed, an end signal is transmitted to the parent device 1 and the communication channel between the parent device 1 and the wireless telephone 2 is disconnected.

(Problems to be Solved by the Invention) As described above, in the conventional wireless telephone device, when a normal call is being made, one of the wireless telephone 2 and the telephone connected to the wired telephone line 3 is on-hook. When the operation is performed, a call end signal is transmitted from the person who performed the on-hook operation, the communication channel between the parent device 1 and the wireless telephone 2 is disconnected, and the mobile phone returns to the standby state. However, when confirming the information such as the speed dial number stored in the memory 14, the call channel is not disconnected until the on-hook operation is performed in the wireless telephone 2. For this reason, when the time until the on-hook operation is performed after returning the speed dial number or the like is long, there has been a problem that unnecessary radio waves not used for the telephone call are continuously transmitted during this time.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wireless telephone device capable of preventing unnecessary radio waves from being transmitted when confirming information such as speed dial numbers.

[Means for Solving the Problems] To achieve the above object, the present invention provides a parent device connected to a wired telephone line, a wireless telephone connected to the parent device via a wireless line, A storage unit provided in the parent device, and a radio line between the radio telephone and the parent device is established in response to an operation of confirming stored information in the storage device in the radio telephone. And a storage information transmission control means for transmitting desired storage information of the storage means to the wireless telephone.A wireless telephone device comprising: Forcible disconnection control means for forcibly disconnecting a wireless line with the wireless telephone is provided.

(Operation) When the wireless communication between the wireless telephone and the parent device is established in response to the confirmation operation on the wireless telephone and the parent device transmits desired storage information to the wireless telephone, the parent device Automatically terminates the wireless line between the parent device and the wireless telephone without performing an on-hook operation or an end-of-call operation at the end of transmission of the storage information of the storage means from the wireless device to the wireless telephone.

According to such a configuration, even if the on-hook operation or the end-of-call operation is forgotten after performing the above-described confirmation operation with the wireless telephone, the wireless line established for confirming the storage information of the storage means of the parent device is unnecessarily connected. The inconvenience of continuing can be resolved.

(Embodiment) FIG. 1 is a diagram showing an embodiment of a sequence showing an operation at the time of confirming a speed dial number or the like in the present invention, and the operation of S30 to S33 in FIG.
After a telephone call is established between the user and the user, when the user operates the "abbreviated" key of the key unit 27 to check the speed dial number registered in the memory 14 of the parent device 1 in advance in the wireless telephone 2, A signal indicating this is transmitted to the parent device 1 (S35). The fact that the telephone is in a call state is indicated by a lamp (not shown). When a key "short" is operated, a lamp "confirm" (not shown) is turned on.

Subsequently, as a key code of the speed dial number, for example, a two-digit key code of "6", "0" is used as a key unit.
When input is made with the 27 numeric keys, these key codes are transmitted to the parent device 1 as dial signals (S36, S37). When the master device 1 receives the signal of the two-digit key code “60” following the signal of the “abbreviation” key, the key code “60”
Is searched in the memory 14 for the speed dial number corresponding to As a result, for example, if a speed dial number “0425: 853317” is obtained, a key code “60”, a delimiter code “u” and a speed dial number “0425: 8
53317 "are sequentially returned one digit at a time (S38-S42). Then, when all digits are returned, a forced end signal is transmitted, and the communication channel with the wireless telephone 2 is disconnected (S43).

Therefore, the communication channel is forcibly disconnected even if the on-hook operation is not performed in the wireless telephone 2, so that unnecessary radio waves are not transmitted after returning information such as abbreviated dial numbers. In this case, if the last digit information is added with a control bit having the same meaning as that of the forced end signal, and the control bit is used to disconnect the communication channel, the time until disconnection is further shortened, and unnecessary radio waves Can be further shortened.

[Effects of the Invention] As described above, according to the present invention, after the information requested by the wireless telephone is returned, the forced end signal is immediately returned, and the wireless line between the parent device and the wireless telephone is disconnected. With this configuration, the wireless line can be disconnected without waiting for the radio telephone to perform an operation for ending the call, and as a result, unnecessary transmission of radio waves can be eliminated.

[Brief description of the drawings]

FIG. 1 is a sequence diagram of an information confirmation procedure showing one embodiment of the present invention, FIG. 2 is a block diagram showing a general configuration of a radio telephone device, and FIG. 3 is a conventional diagram at the time of a call operation from a radio telephone. It is a sequence diagram which shows a connection sequence. 1 ... parent device, 2 ... wireless telephone, 3 ... wired telephone line, 4 ... line relay, 6, 19 ... transmitter, 7, 20 ... transmission antenna, 8, 15 ... reception antenna, 9 , 16 …… Receiver,
10, 21 ... synthesizer, 13, 24 ... control circuit, 14 ... memory, 17 ... receiver, 18 ... transmitter, 26 ... liquid crystal display, 27 ... key unit.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideki Toyama 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Yuji Ota 1-16-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Japan Within the Telegraph and Telephone Corporation (72) Inventor Yukihiro Shimura 5-33-1, Shiba, Minato-ku, Tokyo NEC Corporation (72) Inventor Shin Saegashi 5-33-1, Shiba, Minato-ku, Tokyo NEC Corporation In-house (72) Inventor Tomohisa Ichikawa 3-1-1, Asahigaoka, Hino-shi, Tokyo Inside the Toshiba Hino Plant Co., Ltd. (56) References JP-A-55-45288 (JP, A) JP-A-52-45805 (JP, A)

Claims (1)

(57) [Claims] 1. A parent device connected to a wired telephone line, a radio telephone connected to the parent device by a radio line, storage means provided in the parent device, and storage of the storage means in the radio telephone A storage information transmission control for establishing a wireless line between the wireless telephone and the parent device in response to an information confirmation operation, and transmitting desired storage information of the storage means from the parent device to the wireless telephone. And a forcible disconnection control means for forcibly disconnecting a wireless line between the parent device and the wireless telephone at the end of transmission of the stored information from the parent device to the wireless telephone. A wireless telephone device.