JPH01208944A - Low electric field detecting alarm processing system for cordless telephone set - Google Patents

Abstract

PURPOSE:To allow a user to recognize the arrival of a low electric field even when a stationary station detects a low electric field earlier than the mobile station by sending a low electric field detecting alarm data to the mobile station when the stationary station detects the low electric field state during communication, allowing the mobile station to receive the data and to raise an alarm. CONSTITUTION:The system is constituted such that a low electric field data transmission circuit 3 is added to the control section 14 of the stationary station 1 and a reception data monitoring circuit 4 is added to the control section 24 of the mobile station 2. When the radio section 13 of the stationary station 1 during communication detects that the electric field level of the carrier is in lower electric field than the setting value by using a cordless telephone set, a low electric field detecting alarm is sent from a low electric field data transmission circuit 3 via a base band circuit section 12 and the radio section 13. The radio section 23 of the mobile station 2 receives the alarm data and a reception data monitoring circuit 4 energizes a buzzer or lights a lamp for a specific time (e.g., 10sec) via the base band circuit section 22 to inform the low electric field state to the user. After the transmission of the low electric field detection alarm data for the specific time, the stationary station 1 stops the transmission.

Description

[Detailed Description of the Invention] [4 Already Required] Regarding cordless telephones in which a fixed station and a mobile station are operated facing each other via a wireless line, the present invention is applicable not only when the mobile station detects a low electric field during a call, but also when the mobile station detects a low electric field during a call. Even when the fixed station detects a low electric field, the mobile station receives low electric field detection alarm data from the fixed station and sends out an alarm signal to notify the mobile station user. a low electric field data transmission circuit for informing a mobile station that the electric field strength of the fixed station is low;
The mobile station is configured to include a received data monitoring circuit for receiving low electric field detection alarm data sent from the low electric field data sending circuit from the fixed station and sending out an alarm signal at the control port of the opposing mobile station. do.

[Industrial application field]

TECHNICAL FIELD The present invention relates to an improved low electric field detection alarm processing method for cordless telephones.

A cordless telephone consists of a fixed station connected to an exchange and a portable mobile station, and is configured so that the curl cord of the telephone is wirelessly connected so that the mobile station can make a call to the outside via the fixed station.

Here, CE P T (Conference o
f European Postal and Te
communications administration
For cordless telephones with tration) specifications, N-S
Q (Noise 5quelch) and C-S Q
(Carrier 5quelch) performs two levels of electric field strength detection, and if a fixed station or mobile station detects a low electric field state continuously for a specific period of time (for example, 10 seconds) using C-3Q, the call will be terminated. Yo,
Furthermore, when a low electric field condition is detected, the mobile station is required to send out an alarm signal such as a buzzer to notify the user of the low electric field condition and encourage the user to move to a place with a better electric field condition. ing.

[Conventional technology]

FIG. 4 is a block diagram of a conventional low electric field detection alarm processing method for a cordless telephone, in which 1 is a fixed station, 2 is a mobile station, and 11 is a station in charge of the interface between the cordless telephone and a switchboard (not shown). The line interface section includes a ringer detector 11-1 that detects a ringer when a call is received, and a 2-wire to 4-wire conversion circuit that converts the office line from 2 wires to 4 wires and separates it into a transmitting system and a receiving system. 11-2 and DTM F
(Dual Tone Multi Frequency
y) or a dial oscillator 11-3 that generates dial pulses, 13 and 23 are radio sections of the fixed station 1 and mobile station 2, respectively, and 12 and 22 are connected to the radio sections 13 and 23 for transmitting calls. The baseband circuit unit transmits audio from the system and the receiving system, and includes compressors 12-2 and 22-2 for compressing the audio level, expanders 12-5 and 22-5 for expanding the audio level, and a modem 12-7 and 2
2-7 and amplifiers 12-1.3.4.6 and 22-1.3
, 4.6, and 14 and 24 are control units that control and monitor the operations of each part of the fixed station 1 and mobile station 2, and store the contents of the control circuits 14-1 and 24-1 and the dial memory of the fixed station 1. RAM 14-2 for dial memory and display data RA for storing the contents of display data of mobile station 2.
A low electric field detection alarm control circuit 24 that detects a low electric field state in M24-2 and the mobile station 2 and sends an alarm output to the outside.
-4, fixed station l, and mobile station C that processes control information of the mobile station 20
Consists of PU14-3 and PU24-3.

In the conventional low electric field detection alarm processing method of a cordless telephone shown in FIG. After adjusting the level of the audio band signal in the baseband circuit section 12 via the conversion circuit 11-2, it is FM modulated in the radio section 13 and is converted into a high frequency signal (e.g. 959MH).
Z band). This radio wave is received and demodulated by the radio unit 23 of the mobile station 2, and the audio level is adjusted by the extender 22-5 of the baseband circuit unit 22 as a voice band signal, and the call output is sent to an earphone (not shown) or the like. be done. On the other hand, the voice input from a microphone (not shown) installed in the mobile station 2 is level-adjusted by the compressor 22-2 of the baseband circuit section 22, then FM-modulated by the radio section 23, and then FM-modulated by the radio section 23 to generate a high frequency signal (e.g. 914M) lz band). These radio waves are received and demodulated by the radio section 13 of the fixed station 1, and level-adjusted by the extender 12-5 of the baseband circuit section 12 as a voice band signal. It is sent to the exchange via the conversion circuit 11-2. Each control unit 1 of the fixed station 1 and mobile station 2
4 and 24 are the central office line interface section 11 under the control of the built-in CPUs 14-3 and 24-3, respectively.
Baseband circuit sections 12 and 22, radio sections 13 and 23
control and monitoring.

In the conventional low electric field detection alarm processing method of the cordless telephone shown in Fig. 4, as described above, N
- Two levels of field strength detection are performed using C-3Q and C-5Q, of which fixed station 1 or mobile station 2
If a low electric field state is detected continuously for a specific period of time (for example, 10 seconds) using Q, the call is terminated, and the mobile station 2 sends an alarm with a buzzer etc. when a low electric field state is detected. The device notifies the person of the low electric field condition and at the same time prompts the person to move to a place with a better electric field condition.

When a low electric field state is detected on the mobile station 2 side, the low electric field detection signal from the control circuit 24-1 connected to the wireless section 23 is
Low electric field detection alarm system via tJ 24-3? I[
1 circuit 24-4, and the circuit outputs an alarm signal so that a buzzer or a lamp (both not shown) sounds or lights up.

[Problem to be solved by the invention]

However, in the conventional low electric field detection alarm processing method for cordless telephones, if fixed station 1 detects a low electric field state before mobile station 2, fixed station 1 sends an alarm signal to mobile station 2. Radio section 13 of fixed station 1 without
This will cut off the transmission of radio waves. Therefore, the mobile station 2 is disconnected from the call without issuing an alarm due to the low electric field condition. This is for each radio section 1 of fixed station 1 and mobile station 2.
This is due to the sensitivity difference between C-3 and C-3Q, the difference in C-3Q setting values, fading, etc.

On the mobile station 2 side, the low electric field detection alarm does not sound.
1tl1 conversation is disconnected, giving the person on the other end an unnatural feeling. There is a problem in that if the fixed station 1 detects a low electric field state, the call will be disconnected no matter what state the mobile station 2 is in.

In view of these problems, the present invention has been developed to
detects a low electric field state, it sends low electric field detection alarm data to the mobile station 2 by taking advantage of the fact that in this state data can be sufficiently transmitted and received even if it is impossible to make a call at E due to the drop in S/N. The mobile station 2 receives the low electric field detection alarm data from the fixed station 1 and issues an alarm signal to notify the user of the low electric field condition of the cordless telephone. The purpose is to provide a detection alarm processing method.

[Means for Solving the Problems] Fig. 1 is a principle diagram of the low electric field detection alarm processing method for a cordless telephone according to the present invention. An electric field data sending circuit 3 and a received data monitoring circuit 4 are connected to the control unit 24 of the mobile station 2.
It has a configuration with the addition of.

[Effect]

In the present invention, as shown in FIG. 1, during a call using a cordless telephone, the radio section 13 of the fixed station 1 detects that the electric field level of the carrier of the fixed station 1 has become lower than the set value. In this case, this detection signal controls jl11 section 14.
from the low electric field data transmission circuit 3 to the baseband circuit section 12
and transmits low electric field detection alarm data to the mobile station 2 via the wireless section 13. In the mobile station 2, the low electric field detection alarm data transmitted from the fixed station 1 is received by the wireless unit 23, and the received data monitoring circuit 4 of the control unit 24 receives the low electric field detection alarm data for a specific period of time (for example, 10 seconds) via the baseband circuit unit 22. ) Notify users of low electric field conditions by sounding or lighting a buzzer or lamp. The fixed station 1 is designed to suppress transmission after transmitting low electric field detection alarm 1 and data for a specific time.

Furthermore, when the fixed station 1 detects that the electric field level of the carrier has returned to the set value, it transmits electric field return data to the mobile station 2, and the mobile station 2 receives this data and has a function to stop the low electric field detection alarm. I try to have it.

The above method solves the problem of the conventional method, where when the fixed station 1 is in a low electric field state, the call is automatically disconnected without sending the low electric field detection alarm data to the mobile station 2. be done.

(Embodiment) FIG. 2 is a block diagram of a low electric field detection alarm processing system for a cordless telephone according to an embodiment of the present invention. Components that are the same as those shown in FIG. ing.

Further, FIG. 3 shows an operational flowchart of a low electric field detection alarm processing method for a cordless telephone according to an embodiment of the present invention.

FIG. 2 shows a configuration in which a low electric field data sending circuit 3 is added to the ;+jl divider 14 of the fixed station 1, and a received data monitoring circuit 4 is added to the control circuit 24 of the mobile station 2 in the block diagram of FIG. , the general operation is the same as that described above with reference to FIG. 4, so a description thereof will be omitted.

The radio unit 13 of the fixed station 1 and the radio unit 23 of the mobile station 2 monitor the electric field level of the carrier during the call, and when they detect that the electric field level has become lower than the set value, the control circuit 14-1 of the control unit 14 and a low electric field detection signal to the control circuit 24-1 of the control unit 24, respectively. When the radio unit 13 of the fixed station 1 detects that the electric field level of the carrier has become lower than the set value during a call, it sends a low electric field detection signal to the control circuit 14-1 of the fixed station 1 as described above. Control circuit 14
-1 transmits this low electric field detection signal to the mobile station 2 from the wireless unit 13 via the low electric field data sending circuit 3 via the CPU 14-3, the modem 12-7, and the low electric field detection alarm data at a specific time (for example, 10 seconds) and then stop this transmission. In the mobile station 2, this data is received by the radio unit 23 and inputted to the low electric field detection alarm control circuit 24-4 via the control circuit 24-1 and CPU 24-3, while the data is received via the modem 22-7. The alarm data received by the data monitoring circuit 4 is determined to be low electric field detection alarm data of the fixed station 1, and the low electric field detection alarm control circuit 24
-4 is activated to output an alarm signal that causes a buzzer or lamp to sound or turn on, informing the user of the low electric field condition and giving the user time to improve the electric field level, such as moving to another location.

Furthermore, after the wireless unit 13 of the fixed station 1 detects that the electric field level of the carrier has become lower than the set value, the wireless unit 13 returns the electric field level of the carrier to the set value or higher within a specific time (for example, 10 seconds). When detecting that the wireless unit 13 of the fixed station 1 has
Send an electric field return signal to 4-3.

CP 0.14-3 transmits the electric field return signal from the wireless unit 13 of the fixed station 1 to the mobile station 2 via the modem 12-7. In the mobile station 2, this signal is transmitted to the radio section 23.
The low electric field detection alarm is stopped by the low electric field detection alarm control circuit 24-4 via the control circuit 24-1 and the CPU 24-3, and the user is informed that the carrier level has returned to the specified value or higher. Informs you that you are ready to make a call.

The low electric field state of the mobile station 2 is determined by monitoring the C-3Q level of the wireless unit 23 and transmitting the low electric field signal to the control circuit 24-1 and the CPU 2.
4-3 to the low electric field detection alarm control circuit 24-4, and outputs an alarm with a buzzer or lamp.

As mentioned above, the flowchart in Figure 3 summarizes the flow of operations during a call in this method between the fixed station 1 and the mobile station 2, and since it overlaps with the above explanation, this explanation will be omitted. .

〔Effect of the invention〕

As explained above, according to the present invention, regarding a cordless telephone, even if a fixed station detects a low electric field before a mobile station during a call, the mobile station sends out an alarm so that the user will not be in a low electric field state. This eliminates the problem of the fixed station suddenly disconnecting the call without sending an alarm to the mobile station when a low electric field is detected, unlike in the conventional system. This has great effects in terms of quality improvement, such as being able to compensate for variations in the C-3Q (carrier squelch) setting values of the radio sections of fixed stations and mobile stations.

[Brief explanation of the drawing]

Fig. 1 is a principle diagram of a low electric field detection alarm processing method for a cordless telephone according to the present invention, Fig. 2 is a block diagram of a low electric field detection alarm processing method for a cordless telephone according to an embodiment of the present invention, and Fig. 3 is a diagram of the low electric field detection alarm processing method according to the present invention. FIG. 4 is a block diagram of a conventional low electric field detection alarm processing method for a cordless telephone. In the figure, 1 is a fixed station, 2 is a mobile station, 3 is a low electric field data transmission circuit, 4 is a received data monitoring circuit, 11 is a station line interface section, 12 and 22 are baseband circuit sections,
13 and 23 are radio sections, and 14 and 24 are control sections. Ogusoriha Ichiya Sajin Itafu 1 Ka 4Fti Ding Flow + Yatoshi 1 Figure 3

Claims (1)

[Claims] In a cordless telephone in which a fixed station (1) and a mobile station (2) are operated facing each other via a wireless line,
A low electric field data transmission circuit (3) is included in a control section (14) that controls and monitors the station line interface section (11), baseband circuit section (12), and radio section (13) of the mobile station (1). A received data monitoring circuit (4) is provided in each of the control unit (24) that controls and monitors the radio unit (23) and the baseband circuit unit (22) of 2), and the mobile station (2) is Not only when an electric field is detected, but also when the fixed station (1) detects a low electric field, the fixed station (1)
The mobile station (2) receives alarm data from the low electric field data transmission circuit (3) of the mobile station (2), transmits an alarm signal, and notifies the user of the mobile station (2). Low electric field detection alarm processing method for cordless telephones.