JPH0329543A - Radiotelephony system - Google Patents

Abstract

PURPOSE:To avoid repetitive call to a slave set whose communication is disabled by sending an end signal to a master set by a slave set when the communication condition is not satisfied and allowing the master set to stop the call to the slave set in response to the reception of the end signal. CONSTITUTION:The master set 1 sends a data including an identification signal of each slave set to plural slave sets 2-4 at calling and the slave sets 2-4 sends the data of each reply in time division based on callout. Then the master set 1 detects the data from the slave sets 2-4 at a detection time interval responding to the number of the slave sets 2-4 to be called. Moreover, the slave sets 2-4 sends an end signal to the master set 1 when the communication condition is not satisfied and in the case of receiving the end signal, the master set 1 eliminates the identification signal of the slave sets 2-4 from the callout data to stop the call of the slave sets 2-4. Thus, the event of continuing a call signal useless to a slave set disabled of communication is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a wireless telephone device, and particularly relates to a base unit connected to a telephone line, and a plurality of slave units connected to the base unit via a wireless line. The present invention relates to a wireless telephone device having the following.

(b) Techniques of Jubei Conventionally, this type of wireless AT communication device, for example,
The one disclosed in Publication No. 55333 (HO4B7/26) is known.

This type of wireless telephone device has a base unit connected to a telephone line and a plurality of slave units connected to the base unit via wireless links,
When a call is received, the base unit puts the repeater control circuit into the incoming call state based on the detection of an incoming call signal from the telephone line, and transmits a ringing tone from the tone generation circuit to the slave unit. The handset operates a ringing tone generation circuit based on the ringing tone from the base unit, and generates a ringing tone from the speaker.

In such a calling state, when the hang-up circuit of the handset is turned on, the presence or absence of a mute signal from the base unit is first determined, and if there is no mute signal, a hang-up tone is transmitted to the base unit. The base unit completes the hang-up operation on the telephone line based on the hang-up tone from the slave unit, and sends a mute signal back to the slave unit.

The handset is prohibited from transmitting and talking based on the mute signal, but since the handset that sent the hang-up signal refuses to be controlled based on the mute signal, the handset and base unit are in a one-to-one relationship. are connected by the relationship.

(c) Problems to be Solved by the Invention According to the above-mentioned conventional technology, it is possible to achieve the connection between the base unit and the slave unit and the privacy of the call. If the power is turned off or the voltage of the battery that serves as the power supply falls below the specified value and the communication conditions are no longer met, the base unit will not be able to detect this, so it will not be able to communicate with the slave unit that cannot communicate. There is a habit of causing the problem of continuing to send ringing signals in vain.

(2) Means for Solving the Problems In view of the above points, the present invention includes a base unit connected to a telephone line, and a plurality of slave units connected to the base unit via wireless lines, At the time of calling, the base unit transmits data including the identification signal of each slave unit to the plurality of slave units, and also determines the time width for detecting the data sent from the slave unit. The handset is configured to transmit data in response to the data from the base unit in a time-sharing manner based on the data from the base unit, and the slave unit is set according to the communication conditions. When the condition is no longer satisfied, a termination signal is sent to the base unit, and the base unit is configured to stop calling the slave unit in response to receiving the termination signal.

(E) Effect According to the present invention, when making a call, the base unit sends data including an identification signal of each slave unit to a plurality of slave units, and the slave unit sends data for each response based on the call data. is transmitted in time division. The base unit detects data from the slave units with a detection time width corresponding to the number of slave units being called. In addition, when the communication conditions are no longer satisfied, the slave unit sends a termination signal to the base unit, and when the base unit receives this termination signal, it deletes the identification signal of the slave unit from the call data and Stops calling the slave unit.

(f) Embodiment FIG. 1 is a block diagram of the present invention, and (1) is a telephone line (L
), and (2), (3), and (4) are a plurality of slave units connected to the base unit (1) via wireless lines.

FIG. 2 is a diagram showing an embodiment of the base unit in the wireless telephone device of the present invention. (5) is a receiving antenna, (6) is a high-frequency amplifier circuit that amplifies the received high-frequency signal from the receiving antenna (5), (7) is a receiving PLL section that serves as a local oscillation circuit, and (8) is a high-frequency amplifier circuit ( (9) is a mixing circuit that mixes the high frequency signal from 6) and the oscillation signal from the reception PLL section (7) to derive a predetermined intermediate frequency signal;
), an intermediate frequency amplification circuit that amplifies the intermediate frequency signal from (
10) is a detection circuit that detects the intermediate frequency signal from the intermediate frequency amplification circuit (9), (11) is an amplifier that amplifies the detection signal from the detection circuit (10), and (l2) is the detection circuit (10).
) is a modem for converting the detected signal from the control circuit (13) into digital data.
is supplied to The control circuit (13) executes the program stored in the program memory (13a).
U (13b), a data memory (13C) in which the number of connected handsets, identification signals (ID signals) of each handset, etc. are stored in order of priority, and an IO boat (13d). has been done. The modem (12) also has a control circuit (
13) digital data from MSK (Mini
mumShift keying) signal. (
14) is a modulation circuit to which the signal from the modem (12) is supplied as a modulation signal and the transmission PLL section (15) is supplied as a modulated signal; (16) and (17) are the outputs of the modulation circuit (14). (18) is a transmission antenna, (19) is a common terminal and data terminal connected to the modulation circuit (14),
a first switch (2) having an extension terminal and an outside terminal and controlled by a control signal (S1) from a control circuit (13);
0) has an extension terminal connected to the extension terminal of the first switch (19), a common terminal connected to the microphone (2l), and an outside terminal connected to the hybrid transformer circuit (not shown), and Control signal from circuit (l3) (
A second switch (22) controlled by the control circuit (S,) has a common terminal connected to the output terminal of the amplifier (11), an external terminal and an internal terminal connected to the hybrid transformer circuit, and (23) is a common terminal connected to a speaker (24), an external line terminal connected to a hybrid transformer circuit, and a third switch (22), which is controlled by a control signal (S,) from (13). A fourth switch (25) is arranged on the power supply line of the receiving system circuit and is controlled by the control signal (S4) of the control circuit (13). Circuit (13)
a fifth switch controlled by a control signal (s.) from;
(26) is a sixth switch arranged on the power supply line of the transmission system circuit and controlled by the control signal (S.) from the control circuit (13).

FIG. 3 is a diagram showing an embodiment of the handset in the wireless telephone device of the present invention, and since it basically has the same structure as FIG. 2, a dash is added to the reference numerals in FIG. The explanation will be omitted.

However, compared to FIG. 2, the second to fourth switches (20)
(22) and (23) are deleted, and data memory (13) is deleted.
c') stores its own ID signal, is equipped with an operation detection section (27) for detecting operation of a call switch, etc., and has a first switch (19') equipped with a data terminal and an audio terminal. They differ in that they are Furthermore, FIG. 3 shows a battery (BA) serving as a power source, and a voltage detection circuit (1) that detects whether or not the voltage of the battery (BA) is below a specified value and outputs an L level detection signal when the voltage of the battery (BA) is below a specified value. V-DET) and a power switch (SW) are shown, and the intermediate frequency amplifier circuit (9゛) outputs a detection signal (L level) when the level of the intermediate frequency signal is below a predetermined value. being done.

FIG. 4 is a block diagram functionally showing the control circuit (13) of the base unit. In FIG. 4, (28) is the control section, (
29) is a memory unit that stores the ID signal of each child device, and corresponds to a predetermined area of the data memory (13c).

(30) is an address counter that specifies the address range of the memory unit (29) based on the control signal (S,) from the control unit (28), and (31) is an address counter that specifies the address range of the memory unit (29) based on the control signal (S,) from the control unit (28). (29) is a data detection unit that detects various data based on the ID signal from the data detection unit (31), and (32) is a data detection unit that detects various data based on the ID signal included in the digital data and the A flag register (3
3) is a counter that counts the clock (CLK) signal from the control unit (28) and determines the time width for detecting data sent from each child device. In addition, the counter (33
) is a carry or boro (C/B) every time a predetermined number is counted.
It is configured to output a signal and return to its initial value. (34) is a counter that counts carry or borrow signals from the counter (33). Note that the carry or borrow signal is also supplied to an address counter (30), and the address counter (30) is configured to increment in accordance with the carry or borrow signal.

(35) is a setting section in which a value N corresponding to the number of slave devices to be called is set. (36) is a matching circuit that determines whether the counted value of the counter (34) matches the value set in the setting section (35), and the matching signal (S) is sent to the counter (
33) (34) and an address counter (30), as well as the control unit (28). (37) is a timer that measures time T, and (38) is a counter that maintains the number of handsets that are valid for calling. FIG. 5 is a block diagram functionally showing the control circuit (13') of the slave unit.

In FIG. 5, (39) is a control unit, (4o) is a memory unit that stores its own ID signal, and data memory (13c) is a memory unit that stores its own ID signal.
') corresponds to the predetermined area. (41) is a modem (12'
) and the ID from the memory section (4o)
A data detection unit that detects various data based on the signal (
42) is a timer that measures time T, and is reset every time a signal from the base unit is received. (43) is the L level detection signal (S.) from the voltage detection circuit (V-DET)
, an L level detection signal (S,) from the intermediate frequency amplification circuit (9'), and a timing completion signal (Sl) from the timer (42).
．． ) and a control signal (1) for turning off the power switch (SW) are detected, a communication disable flag Iltl+ is set in this flag register.

Next, the operation will be described with reference to the main part flowchart of the parent device shown in FIG. 6 and the main part flowchart of the slave device shown in FIG.

When the base unit (1) is powered on, it first determines whether there is an incoming call via the telephone line, and if there is no incoming call,
Next, it is determined whether there is an extension call request (S-1
．． 2). If there is no incoming call or extension call request, it is determined whether or not a termination signal has been received from the handset (S
-3) If not received, repeat the above procedure.

On the other hand, when an incoming call signal arrives via the telephone line, it is detected by a ringer detection circuit (not shown) provided in the base unit, and the ringer detection circuit sends the detection signal to the control circuit (13).
supply to. The control circuit (l3) determines that there is an incoming call based on the detection signal, and sends the calling data including the ID signal of each handset to all handsets or a specific number of handsets. (S-1.5).

Specifically, it is performed as follows. The control circuit (13
) outputs a control signal (S, ) to switch the sixth switch (26).
After the first switch (19) is switched to the data terminal side by supplying power to the transmission system circuit and outputting the control signal (S,), the call data is transmitted to the modem (12).
supply to. The modem (12) transmits the call data (
After converting the digital signal into an analog signal format by MSK modulating the digital signal, the signal is sent to the modulation circuit (14) via the first switch (19).
). In the modulation circuit (14), the modem (12)
The oscillation signal (which becomes a transmission carrier signal) from the transmission PLL section (15) is modulated by the output signal from the transmission PLL section (15). The signal modulated in this way is then sent to a transmission amplifier circuit (16).
After being reduced in width to a predetermined transmission level in step (17), it is sent out from the transmission antenna (5).

After exiting the call data, the control circuit (13) inputs the address counter (30). A control signal (S,) is supplied to designate the change range of the address counter (30), and a value N (3 in the embodiment) corresponding to the number of handsets to be called is set in the setting section (35). At the same time, the timer (37) is operated and a clock signal is supplied to the counter (33).

On the other hand, if the power switch (SW) of the slave device is turned on by the control signal (S,.), the fifth switch (25') is turned on by the control signal (S.') from the control circuit (13'). is configured to close intermittently, so when the receiving antenna (5°) receives the call data when the fifth switch (25°) is closed, the received signal is transmitted to the receiving high frequency amplifier circuit. (6°), mixed with the oscillation signal from the reception PLL section (7°) in the mixing circuit (8') and converted to an intermediate frequency signal, and then amplified in the intermediate frequency amplifier circuit (9'). , and then detected by a detection circuit (10'). The signal detected in this manner is converted into a digital signal by the modem (12') and then supplied to the control circuit (13').

The control circuit (13') determines whether or not it is calling itself based on its own ID signal stored in the memory section (40) and the data signal from the modem (12'). , for example, the response timing is set based on the number of handsets included in the call data and the exit order (S
-100. 101).

Next, the power switch (S) is turned on by the control signal (5.1).
W) is turned off, or an L level detection signal is supplied from the voltage detection section (V-DET), or a control signal (S,) is supplied from the middle 1m frequency amplification circuit (9'), or the timer (42 ), it is determined whether or not the communication failure flag 1'' is set in the flag register (43) (S-1).
02), if the flag 1'' is not set, the control circuit (13') outputs the control signal (S.') when the set response timing is reached and the sixth switch (26
゜) is closed, power is supplied to the transmission system circuit, the control signal (S,') is output, and the first switch (19') is switched to the data terminal side, and then the response data including the ID signal is sent. to the modem (12'). The modem (12') performs MSK modulation on the response data (digital signal) to form an analog signal, and then sends it to the modulation circuit (14') via the first switch (19'). Modulation circuit (14')
Now, use the output signal from the modem (12') to connect the PL for transmission.
The oscillation signal from the L section (15') is modulated. The thus modulated signal then passes through the transmission field width circuit (16') (17).
') and is then amplified to a predetermined transmission level, and then sent out from the transmission antenna (18°).

On the other hand, if it is determined in S-102 that the communication impossible flag is "1", an end signal is sent out at the timing when the response data is sent out (S-104).

By the way, as described above, after leaving the call data, the base unit (1) specifies the change range of the address counter (30), sets the set value N, and starts supplying the clock signal. In addition, in the initial state, the address counter (
30) is set to the address for the child device with the first priority, and the value of the counter (34) is set to "O".

The counter (33) counts the clock signal, and when the counted value reaches a value corresponding to time T1, it outputs a carry or borrow signal, and then an initial value is set. In addition, the carry or borrow signal of the counter (33) is supplied to the address counter (30), and its contents are incremented, and the address for the slave unit with the second priority is set, and the address is also sent to the counter (34). It is supplied and the count increases by 1.

The control unit (28) then determines the detection time width NT. for detecting data from the slave device determined by the N value set in the setting unit (35). At this point, the ID signal read from the memory section (29) and the ID signal included in the data from the modem (12) are detected, and if they match, it is determined that response data is present (S-8).

At this time, the control unit (28) sets a response flag 1" in the response flag register (32) specified by the value of the counter (34). Detection of such response data is performed when the content of the counter (34) is "1". This continues until it reaches 3” (S-
9.10.11).

This operation will be explained in more detail based on the system shown in FIG. It should be noted that priority is assigned in the order of handset 1, handset 2, and handset 3, and each D signal is designated as X, Y, and Z.

The base unit that sent the call data has an address counter (3
0) is set to the address corresponding to the handset 1, and "3" is set in the setting section (35).

Then, the counter (33) is counting and the counter (33) is counting.
When the value of 4) is "0" and data including the ID signal l
” is set. In this state, when the counter (33) reaches the count value corresponding to time T1, the address counter (
30) is set to the address value corresponding to the handset 2, and the value of the counter (34) becomes "1". At this time, when data including the ID signal Y is detected, the response flag register (32
) is set to response flag 1''.

The same operation follows, but if no response data is detected from handset 3, the contents of the response flag register are rll
OJ, and the control unit (28) sends the call data only to the handset 3 again. However, since only the handset 3 requires retransmission, the address counter (30) is set to the address value corresponding to the handset 3, and the setting section (35) is set to "1". Such retransmission is performed when response data from handset 3 is detected or when the timer (37) reaches time T.
(S-12. 13.)
14. 15).

Then, when all the response flags become 1 or when time T elapses, the base unit sends a calling signal including the ID signal of each slave unit to the slave units whose response flag is “1” (S-
16).

On the other hand, after sending the response data in S-105, the handset is in a reception standby state, and when it receives a calling signal including its own ID signal (S-106), it sends the calling signal to a ringer circuit (not shown). Supply and ringer notification. Next, it is detected based on the signal from the operation detection unit (27) whether or not there has been an operation of the call switch, etc., and if there is no operation, it is determined whether or not the communication disabled flag 1'' is set, and if it is not set. If not, send response data in the same way as when receiving the call data described above (S-111, 1
12. 113). On the other hand, if the communication failure flag "1" is set, an end signal including an ID signal is sent at the timing of sending the response data (S-114).
. Further, if a call switch or the like is operated, an operation signal including its own ID signal is sent out (S-115).

Even after sending out the calling signal, the base device detects operation signals or response data from the handset at a time interval corresponding to the number of called handsets, in the same way as when detecting response data from the handsets described above. (S-17).

When the operation signal is received, the response flag is set to “11”.
is set in the flag register (32). Next, the number of response flags "l1" included in the flag register (32) is detected, and it is determined whether there is a plurality of slave units that have sent the operation signal (S-18). As a result, if there are multiple handsets that have sent the operation signal, the handset to be called is determined based on the priority order stored in the data memory (13C), and then the operation response signal containing the ID signal of the handset is sent to the handset. After sending the message to the device, it is set to talk state (S-19.20
．． 21).

On the other hand, after transmitting the operation signal, the handset determines whether an operation response signal has been received, and if the operation response signal is received and the ID signal included therein matches its own ID signal, the handset will make a call. set to the state (S-116.11
7, 118). Note that the handset whose ID signals do not match ends the call and returns to the initial state.

In addition, before receiving the call signal from the base unit, the slave unit must receive an operation response signal from the base unit or the communication failure flag is set to 1.
When it is determined that is set, the call processing operation ends. Note that when the communication disabled flag 1'' is set, a termination signal is sent to the base unit and the initial state is returned. (
S-107 to 110).

When the base unit fails to receive the operation signal from the slave unit, the base unit receives the termination signal based on the contents of a 7 ladder register (not shown) in which a flag “1” is set for each slave unit upon receiving the termination signal. If it is received, it is determined whether the handset corresponding to the flag 1" is currently calling, and if it is, the calling operation of the handset is activated. The counter (38) that stores the number of called slave devices is counted down by one.The value of the counter (38) is rQ.
When it reaches J, the calling operation ends and returns to the initial state (
S-22 to 26). On the other hand, if the termination signal is not received, the calling signal is sent again.

In addition, when the slave unit is in standby mode and the communication failure flag becomes “1”, it sends a termination signal to the base unit, and the base unit responds to the receipt of the termination signal by setting the flag “1” to the slave unit. and set it. Then, at the time of calling, the base unit sends response data including ID signals of the slave units except for the slave unit for which the flag 1'' is set.

As described above, the operation of the present invention is accomplished, but the present invention is not limited to the above embodiments, and the present invention may always send an end signal at a predetermined timing or notify a ring tone using call data. It is possible to make various changes.

(G) Effects of the Invention According to the present invention, when the communication conditions are no longer satisfied, the slave unit sends a termination signal to the base unit, and the base unit responds to the reception of this termination signal by sending the termination signal to the base unit. Since the calls are stopped, calls are not repeated needlessly to a slave device that is unable to communicate.

[Brief explanation of drawings]

Fig. 1 is a block diagram of the present invention, Fig. 2 is a block diagram showing an example of the master unit according to the present invention, Fig. 3 is a block diagram showing an example of the slave unit according to the present invention, and Fig. 4 is a block diagram showing an example of the master unit according to the present invention. Figure 5 is a block diagram functionally showing the control circuit of the machine, Figure 5 is a block diagram functionally showing the M control circuit of the slave machine, Figure 6 is a flowchart of the main parts of the base machine, and Figure 7 is the flowchart of the main part of the slave machine. This is a main part flowchart. (1)...Main unit, (2)(3)(4)...Slave unit, (13)(13')...Control circuit, (28)...
・Control unit, (31)...Data detection unit, (39)...
・Control unit, (SW)...Power switch, (V-DET
)...Voltage detection section.

Claims (1)

[Claims] (1) It has a base unit connected to a telephone line and a plurality of slave units connected to this base unit via wireless lines, and when making a call,
The base unit transmits data including an identification signal of each slave unit to the plurality of slave units, and sets a time width for detecting data sent from the slave units according to the number of slave units to be called. However, on the other hand, the slave unit is a wireless telephone device configured to transmit data in response to data from the base unit in a time-sharing manner, and the slave unit transmits data in response to the data from the base unit in a time-sharing manner. , a termination signal is sent to a base unit, and the base unit is configured to stop calling the slave unit in response to receiving the termination signal.