JPS5830245A - Radiotelephony device - Google Patents

Abstract

PURPOSE:To surely perform recalling with the titled device, by storing occurrence of inversion by detecting the S/N ratio of a received tone signal and, at the same time, by returning the master device to the waiting condition when a call indication is generated. CONSTITUTION:A radio signal from a telephone set is demodulated by a receiver 2 through an antenna 1. A circuit 3 detects the S/N ratio of received signals from the signals received by the receiver 2. A controlling circuit 4 receives detected results of the S/N ratio from the circuit 3, and generates a high level signal WS for the period of the waiting condition and another high level signal TS for the period of talking condition based on the results. When a reset signal RS becomes high level, the system is initialized, and when the S/N ratio detecting signal is continuously low level for a prescribed time, the system is forcedly switched to the waiting condition.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wireless telephone device that can easily and quickly restore a reversed state of control operations between a telephone and a parent device.

Conventionally, control operations between a telephone of a wireless telephone device and a parent device are performed as follows. This will be explained with reference to FIG. That is, when making a call in the standby state, the telephone is set to 7.0 at time 1. When you log off, call control starts and time t! Then, the transmitter of the telephone enters the transmitting state and a control tone signal F is sent out as a calling signal to the radio line as shown in (&)K in the same figure. In the parent device, the same figure (f
) As shown in the IC, the 8/N detection output of the receiver is obtained relatively quickly, and then, after some time, the control tone signal is output at time t3 as shown in ω in the figure. .

A detection output is obtained and call control operation begins. Then, at time t4, the control tone signal F1 as a response signal is transmitted (
) is sent back to the telephone via the wireless line. In the telephone set, the response of the parent device is confirmed by detecting the above response signal at time t6 after the receiver's 87'N detection output is obtained, as shown in Figure (b). The transmission of the redemption code F1 is stopped and the communication state is established.

On the other hand, the parent device Hiro, time tyK this control tone signal F.

By detecting the stoppage of the control tone signal F1, the controller stops returning the control tone signal F1 at time t-, and at the same time closes the DC loop with the exchange via the wired telephone line, as shown in (h) in the same figure. The phone is in a talking state as shown. In this way, after the line between the telephone set and the switching center is established and the two parties are in a common state, the actual telephone conversation begins, from dialing to the called party's response.

On the other hand, when the call ends and returns to the standby state, call end control is started by the hook-on operation at time tll, and the first vA(a) is sent from the telephone to the parent device.
The control tone signal E3 is sent out at time tts as shown in FIG. Is the loading device using the above control tone signal? After detecting (2), after a predetermined monitoring time, it is determined that the ninth control tone signal F of the end of the call has been sent, and the end of the call control is entered. The reason why the monitoring time is taken here is not directly related to the explanation of the control operations for calling and terminating calls, but it can be distinguished from this when the same tone signal F is used to transmit dialing information from the telephone to the parent device. This is necessary for this purpose. Then, the control tone signal F1 is returned at time t14, as shown in FIG. Time t
When the telephone detects this control tone signal F at time t14, the telephone stops transmitting the control tone signal F1 at time t14 and enters the standby state as shown in FIG. On the other hand, the parent device also detects that the transmission of the control tone signal F3 from the telephone has stopped at time tty, and returns the control tone signal F1 at time tty.
ts, and at the same time opens the DC loop with the exchange and enters the standby state as shown in the figure (Xu).Thus, the call termination operation is completed.In this way, the communication between the telephone and the main device The control operations in between are performed in a predetermined order by transmitting and receiving control tone signals, and the order of the control operations is the same for both call origination and call termination operations.

By the way, in a wireless telephone device, the states of the telephone and the parent device may become so-called inverted states. For example, this may occur in the following cases: Normally, when replacing the battery stored in the bottom of the phone, the operator first removes the handset from 7. Remove the phone from the housing and place the phone with the bottom facing up. Therefore, if the handset is 7. 7. The above-mentioned control operation is performed, and both the telephone and the parent device enter the calling state and then the talking state. When you take out the old battery and install a new one, the phone's control unit is initialized and it goes into instant standby mode, and since it is hooked on at that point, it tries to transition from the calling state to the talking state. do. - Since the Banshin device is in a call state at that point and the call origination and call termination operations are the same as described above, it recognizes the telephone's call control as the call termination control and performs this call termination control. Shifts to standby state. When an inversion occurs in this way, the call origination and call termination operations are the same as described above, so even if you try to return to the initial state by operating the footer of the telephone, the telephone and parent Each operating state of the device cannot be permanently reversed to return the reversed state to the normal state.

On the other hand, the wireless telephone device detects the 8N ratio of the wireless line in use, for example, as shown in FIGS.
A function is provided to automatically return the system to an idle state IIAK when the ratio detection level remains below a specified value for a certain period of time (for example, several seconds). Therefore, when an inversion occurs, either the phone or the parent device does not transmit radio waves, so the phone h is 8N in the parent device.
The ratio detection level decreases, and if this state continues for a certain period of time, the system automatically returns to the standby state. However, if the function is used to return from the inverted state, it will take a relatively long time to return to the standby state, making it difficult to respond to situations such as when the user wants to make a call again or make an emergency call. This is not possible, and this may cause a psychological burden on the user.

9. To restore the inverted state, it is possible to make the operating states of both sides match by turning off the power of the telephone or the parent device that is in the talking state, and then turning it on again. I couldn't tell if the phone was talking or not, so I ended up having to turn the power on to both phones, which made the operation extremely complicated and undesirable.

Furthermore, attempts have been made to send a blank line signal from the parent device to the telephone set in order to prevent the occurrence of an inverted state. However, with this method, the configuration of the device becomes complicated and the number of devices increases, and power is consumed even when the device is on standby for sending out blank line signals.
This causes other problems such as increased power consumption.
Nineteenth, this method of using empty wire signals was not desirable because it went against the effective use of frequencies.

The present invention has been made in view of the above circumstances, and its purpose is to solve the problem of the 7. Simply perform the following operations.
It is an object of the present invention to provide a wireless telephone device which can easily and quickly restore an inverted state between a telephone and a parent device, is simple in configuration and control, and has low power consumption.

The present invention will be described below with reference to an embodiment shown in the drawings.

FIG. 2 is a configuration diagram showing the main parts of the parent device of the wireless telephone device in the same embodiment. 2 in the figure is a receiver that receives a radio signal from a telephone (not shown) via the antenna 1 and demodulates it. It also includes a tone signal detection circuit.

3 is a circuit for detecting the SA of the received signal from the signal obtained by the receiver 2, which outputs an H level when the S/N is a predetermined value or more, and an L level output otherwise. 4 is a control circuit that receives the tone signal detection output from the receiver 2 and the S/1 (detection output) from the S/N detection circuit, and based on this, it outputs an H level only during the standby state. This control circuit generates a signal TB which is at H level during the period of the signal 181 talking state.This control circuit is initialized when the reset signal R8 goes to H level and the 87N detection signal is continuously output to a predetermined level. When the time (10 to 20 seconds) is at L level, it has a function of forcibly shifting to the standby state.

5゜l and r are both timer circuits, and clock oscillation wb
The clock pulse from 8 and the enable signal to Zuikoto are supplied to produce the following outputs from the terminal OUT, respectively. The timer 5 outputs an H level only after the enable signal has been at the H level for a predetermined period of time (1 to 2 seconds) and only while the enable signal is at the H level.

The timer l is set until a predetermined time (10 to 20 seconds) has elapsed since the enable signal became H level, and
The output is at H level only while the enable signal is at H level. The timer 7 outputs an H level only after the enable signal has been at the H level for a predetermined period of time (10 to 20 seconds) and only while the enable signal is at the H level. The output of the black oscillator 8 is also supplied to the control circuit 4. 9 is an AND dart, 10 is a delayed flip 70 for storing the inverted state, ! (hereinafter referred to as D-FF)
, 11 is and? -), 12 is orff-).

In the above-described configuration, the operation of reversing and returning from the above-mentioned case where the battery is replaced due to the battery replacement of the telephone will be explained with reference to FIG.

Here, in order to make the explanation easier to understand, the roles of timer 6 and timer 1 will be described later, and the explanation will now be made excluding these.

Figure 3 (Xun~(d) shows the operations related to the telephone; (a) is transmission of tone signal F8, (b) is S/N detection, (C) is reception of tone signal F1, and (d) is It represents various states of itself.Similarly, (・) to ) represent operations related to the parent device, (・) is transmission of tone signal F, (f) is S/N detection, (- is tone Reception of signal F1, (h) represents various states of itself, (quantity) is output of timer 5, (j) is output signal W8 of control circuit 4, (
(1) is the output signal T8. of the control circuit 4. ) is the output of and dart 11
4 represents a reset signal R8 to the control circuit 4.

As shown in FIG. 3(d) K, it is assumed that a new battery is installed in the telephone at time t, and the control circuit within the telephone is initialized. In this state, the phone is in standby mode,
The parent device is in a talking state and is inverted. Immediately after that, the phone detects hook-off and starts calling operation.
On the other hand, the parent device enters the call ending operation), and then the telephone goes into the talking state and the main device goes into the standby state, but the operation during this time is clear from the explanation so far, so
A step-by-step explanation of the operation will be omitted. It should be noted that since the transmitted radio wave from the telephone is emitted from time t② after entering the calling operation, the 117N detection output of the parent device takes some detection time and becomes H level at time Mtaw.

From this time t41, the timer circuit 5 performs a timing operation and produces an H level output at t4 after a predetermined time. 4
At 4m, the parent device is in the standby state, so the control circuit 4
An H level signal WS is output from. As mentioned above, if timer ε is excluded, the other input of Anne-f-1ml is also at H level. Therefore, and? −)
The output of # is at H level 9, and D-FFJO, whose D terminal is always supplied with an H level signal, stores this.

After the parent device enters the standby state, an inverted state occurs when the 87N detection output, which should normally be at H level for a predetermined period of time, remains at H level for a predetermined period of time. I remember this as something that happened.

Note that the reason why the predetermined time is taken in tie Y5 is that, as can be seen from FIG. 1, even during normal operation, there is a time when the SA detection output becomes H level in the standby state immediately before transition to the calling state. Therefore, this is to avoid mistaking this as an inverted state.

Next, the operator of the telephone detects an abnormality because he does not hear the 1N sound that should be heard from the handset if it is normal, and at time tll 7. Suppose you clicked. Then, the telephone moves from the call ending state to the standby state, and the parent device moves from the calling state to the talking state. The tree is in an inverted state.

Now, at time tsy, the parent device changes from the calling state to call letter 111.
When the transition occurs, the signal T8 from the control circuit 4 becomes H level. Since the output signal Q8 of D-FFM# is already at the H level, the output signal of the ANDR 11, that is, the reset signal R8, becomes the H level at this point. The control circuit is immediately initialized by this reset signal and enters a standby state. t], both the telephone and the parent device enter the standby state and the inverted state is restored. Naori-FFJ
Since the reset signal R8 is also supplied to J via the OR (r-) 77, the inversion information is erased.

On the other hand, even if the power of the parent device is momentarily cut off during a call and the parent device enters the standby state, the occurrence of the reversal is first stored in the D-FFJO in the same way as described above. Then, in this state, press 7. When the Q-ON is performed, the telephone goes into a standby state, and the filling device goes into a talking state, and at this time, the call display signal T8 generated from the control path 1 causes a reset signal R8 from the ANDr-)11. When the signal becomes H level, the automatic return function of the control circuit 3 is activated, and the parent device immediately returns to the standby state.

Timers 6 and 9 will be explained except for timers 6 and 9, but their roles will now be explained. Each control circuit of the telephone and the parent device is equipped with a function that forces the telephone to go into standby mode even if it is in a call state when the 87N detection output remains at the L level for a predetermined period of time (1.0 to 20 seconds). As already mentioned, An example of a reversal occurring is replacing the battery during a call.For example, if during a call, one of the top and bottom wireless lines (from the parent device to the phone is considered to be down) is normal, but the other is degraded. For example, if the BIN of the upper device decreases, the parent device will remain in that state for a predetermined period of time (10 to 2
As described above, the device enters the standby state after 0 seconds) has elapsed. Before the parent device goes into standby mode, 87N is too high, so the phone continues to talk, and when the parent device goes into standby mode after a predetermined period of time (10 to 20 seconds) as 87N drops, it outputs BIN.
Since the value decreases, the user must wait for a predetermined period of time (10 to 20 seconds) to enter the standby state. However, before the phone is forced to go into standby mode, when the BAi recovers, the phone goes into the inverted state, but the phone's sA decreases for a predetermined period of time (1
(up to 20 seconds), there is no need to detect whether or not f is still reversed at the first time when both the parent device and the telephone enter the standby state. As mentioned above, the timer 6 is provided at the 9th point to prohibit reversal detection after a predetermined period of time (10 to 20 seconds) has passed after the parent device enters the standby state, and the set time is 8AI. The predetermined time (1
0 to 20 seconds). -10,000-' After the inverted letter 11 is stored in FFl0, the call letter 1 is
1, the telephone side also returns to the standby state, so no further storage is necessary. Timer 7 is a rounding device that erases this unnecessary memory.

Accordingly, according to this embodiment, the received tone signal is 87N.
During this reversal memorization period, the control circuit 3 generates a call indicator Tl, and then activates the automatic return function of the control circuit 3 to return to the parent device. 7) on the phone). It is possible to restore the inversion state in an extremely short time by simply performing a simple operation, and this makes it possible to reliably respond to re-calls and emergency calls, thereby reducing the psychological burden on the user. can be significantly reduced. In addition, it can be realized with a relatively simple configuration, so
Compared to the conventional system that uses a blank wire signal to prevent the occurrence of reversal, the device configuration can be made simpler and more compact.

In addition, since signals do not need to be constantly transmitted, power consumption can be reduced and frequencies can be used more effectively.

Note that the present invention is not limited to the above embodiments.

For example, in the above embodiment, a case has been described in which the circuit necessary for inverting and returning is provided on the parent device side in consideration of miniaturization and low power consumption of the telephone, but it may be provided on the telephone side.

Also, things that remember the occurrence of reversal include D-furi and def0tsu! In addition to 6, another memory element or memory circuit such as a random access memory (RAM) may be used.
This can be implemented as appropriate by configuring each timer to serve as a single timer. Also, each circuit according to the present invention together with the control circuit 3! Ikukuprose, t may be substituted. In addition, the logic of each circuit, the counting operation period of each timer, etc. can be modified in various ways without departing from the gist of the present invention. 1 is a timing diagram of rounding used.

l...8A detection circuit, 4...control circuit, 5.6゜7
...Timer circuit, 10...Memory circuit, WS...Standby wt1 diagram

Claims (1)

[Claims] A telephone is a wireless communication system that is connected to a telephone and a master device that is connected to the telephone by a wireless circuit and to the exchange by a wired line, and performs call origination control and call termination control between the two parties by transmitting and receiving control tone signals in the same order. In a telephone device, an 87N detection circuit that detects 8/N of a received signal received by a receiver, and an 8714 detection circuit that detects 8/N of a received signal received by the receiver, and an 8714 detection circuit that detects 8/N of a received signal for a certain period of time or more. A memory for storing this fact, considering it as a state reversal of the parent device and the telephone organization when it is detected that the state has exceeded 9. When the self-side device shifts from the stand-by state to the talking state due to operation, this is detected and the state of the own side is forcibly returned from the talking state to the stand-by state to exchange control tone signals with the other party. A wireless telephone device, characterized in that a control section is provided in the telephone or the parent device.