JPH0437326A - Incoming call monitoring system for radiotelephony system - Google Patents

Abstract

PURPOSE:To attain quick reply against an incoming call by devising this system such that other radiotelephony sets than that replying with an incoming call continuously monitor continuously a control channel from the state of an incoming call reply with the radiotelephony set and the other radiotelephone sets are transited to intermittent monitor after the lapse of the setting time. CONSTITUTION:When an incoming signal is sent from a connection device 21, in the radiotelephony sets 31-3m making the intermittent monitor of control channel, incoming call signal at monitoring times T2, T3 arrived at first after the transmission of the incoming call signal is received and when a controller 304 confirms the reception of the incoming call signal, the transmitter-receiver 301 sends the incoming call reply signal to the control channel to await a speech channel designation signal from the connection device 21. Moreover, the controller 304 changed the intermittent monitoring action of the control channel by the radiotelephony sets 31-3m from the monitoring times T2, T3 into the continuous monitoring action.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a signal monitoring system for wireless telephones in a wireless telephone system. The present invention relates to an incoming call monitoring method that is effective in reducing the delay time for displaying an incoming call on a wireless telephone when an incoming call occurs within a short period of time.

[Prior Art] So-called cordless telephones have been put into practical use, in which a telephone line is terminated with a connecting device, and the connecting device and the telephone are connected via a wireless line. Systems applied to the field of telephone equipment, i.e. multiple telephone lines (external lines, internal lines, doorbell lines, etc.)
and a plurality of connection devices in the main device, and in the main device, the telephone line and the connection device are connected by a wired line, and the connection device and the wireless telephone are connected by a wireless line. Wireless telephone systems that are shared by wireless telephones are being put into practical use.

Generally, in wireless telephones (cordless telephones), in order to reduce the consumption of the built-in battery (battery save),
During standby, the control channel of the wireless line is intermittently monitored by being controlled so that signals can be exchanged for 80 msec at a cycle of 2 seconds, for example, and the control channel of the wireless line is intermittently monitored. Radio telephones of the telephone system are similarly controlled.

In a wireless telephone system, when a call is received on the telephone line,
In order to perform incoming call display a (bell ringing control) on a radio telephone on standby, the intermittent monitoring operation of the control channel in the radio telephone concerned is a continuous monitoring operation (operation that allows sending and receiving signals via the control channel at any time). When the incoming call is displayed and one of the wireless telephones responds to the incoming call, the wireless telephones other than the one that answered the incoming call check for responses from other wireless telephones and resume intermittent monitoring of the control channel. and returns to standby operation (standby control).

The above operation will be explained in detail with reference to FIG.

FIG. 3A shows a time chart regarding the control channel during incoming call processing using the conventional control method.

As shown in this time chart, consider a case where incoming calls to a telephone line occur on a plurality of lines, for example, two lines, within a short period of time.

Wireless telephone device +, position 2 has the same cycle t1 when on standby,
In addition, intermittent monitoring of the control channel is performed asynchronously with each other (standby mode a).

When incoming call 1 occurs at time T, wireless telephone device I, position 2
is the first monitoring time T that arrives after the occurrence of the incoming call 1.2. Continuous monitoring of the control channel begins at T3, and during time t2, the signals necessary for incoming call processing and control are completed between the main device and the wireless telephone set 2, and the communication channel is set and the incoming call is completed. A display signal (herring ring signal) RG is sent from the main device to the wireless telephone device.

An incoming call is displayed on station 2. It is assumed that while the incoming call for the incoming call 1 is being displayed, a separate incoming call 2 occurs at time T4.

Now, when the wireless telephone device performs a response operation at time T, the incoming call processing has been completed by this time T for incoming call 1, so the above response operation becomes a response to the incoming call 1, Incoming call display signal R at time T5
G transmission is cut off and the incoming call display stops. At this time, the radio telephone device 2 detects the response information of the other radio telephone device + sent from the main device and starts the intermittent monitoring operation of the control channel again, but at this time, the incoming call 2 has already occurred at time T4. Therefore, during the restarted intermittent monitoring operation, the continuous monitoring operation starts from the first monitoring time T6, and the incoming call display signal RG is sent out after time t2, similar to the process for incoming call 1 above, and the waiting wireless telephone An incoming call is displayed on the device 2.

[Problems to be Solved by the Invention] As is clear from the above explanation, in the conventional incoming call monitoring system, when multiple incoming calls occur overlappingly within a short period of time, the remaining calls remain after one incoming call is answered. The display of an unanswered call on the standby wireless telephone will be delayed for a considerable period of time (during time t3 in the example of FIG. 3A). The number increases each time a call is answered, so the display of incoming calls that remain unanswered until the end will be delayed significantly from the actual incoming call.

The present invention is proposed to solve the above problems, and aims to provide an i! The subject is

Means for Solving ci*s] To solve the above problems, the present invention provides that, when an incoming call occurs, a wireless telephone other than the wireless telephone that responded to the incoming call can respond to the above-mentioned problems from the time the other wireless telephone responds to the incoming call. A continuous monitoring operation of a control channel is started, and after a set time, the continuous monitoring operation is shifted to an intermittent monitoring operation.

[Function] When an incoming call is displayed on the wireless telephone and one of the wireless telephones answers the incoming call, the monitoring time for the control channel of the wireless line has immediately arrived on the other wireless telephones, and furthermore, the monitoring time has exceeded the set time. Continues for a while. Therefore, if a new incoming call arrives during this period, the wireless telephone can immediately start processing the incoming call without waiting for the intermittent monitoring time to arrive, so the time from the time the new incoming call occurs until the incoming call is displayed on the wireless telephone is Delay time is reduced.

Embodiment FIG. 1 is a block diagram of a wireless telephone system according to an embodiment of the present invention, and FIG. 2 is a flow chart showing control of incoming call processing within the wireless telephone. Incidentally, FIG. 3B shows a time chart for comparison with the conventional example.

As shown in FIG. 1, the wireless telephone system of the embodiment includes a main device 1, a plurality of connection devices 2. ~2n, and a plurality of wireless telephones 3 and ~3o.

The main device 1 includes a plurality of external lines 41 to 4r and connection devices 2□ to
2o, and an external line trunk (COLTRK) which is an interface for accommodating the external lines 41 to 4r.
) 101+~101. , the outside line trunk 101, ~1
01. It is mainly composed of a switch circuit network (SW) 102 and a 1-chip CPU that selectively connects the connection devices 2□ to 2n with wired lines, and each part of the main device 1 is controlled via a control bus 104. It has a controller (CONT) 103 that controls the above-mentioned connection devices 21 to 2o via a control line 105.

Connection devices 2□ to 2n are all composed of the same circuit,
Wireless telephone 3. ~3o and the connection device 2□~2. , a transmitter/receiver (TRX) 201 that connects the
and a controller 2 which mainly controls the transmitter/receiver 201 via the control bus 203 according to commands from the controller 103 of the main device 1.
02.

The radio telephones 3□ to 31 are all configured with the same circuit, and include a transmitter/receiver (TRX) 301 for coupling between the connection devices 21 to 2n and the radio telephones 3, to 31 through a wireless line.
．． Hybrid (HYB) 302 that separates call audio into sending and receiving audio, handset (HAND 5ET)
) 303.1 chip CPU, and has a controller (CONT) 304 which mainly controls the transmitter/receiver 301 via a control bus 306, and an incoming call indicator (BEL) 305 which audibly displays incoming calls.

Next, the operation of the embodiment will be described with reference to FIGS. 2 and 3B.

Each of the telephones 31 to 3 is waiting to receive an incoming call signal (a signal indicating that there is an incoming call to the outside line 4. to 4) from the connecting devices 21 to 2o in step (3). As shown in FIG. 3B, this reception standby of the incoming call signal is based on an intermittent monitoring operation of the control channel that is repeated at a period t1, as in the conventional example. Note that this standby mode is not performed on wireless telephones 3k (the suffix k indicates a specific item, and the same applies to other symbols hereinafter), which is already in a call mode and has a call channel set. . However, in the following explanation, all wireless telephones 31 to 3. , is in the standby state. Although FIG. 3B shows one time chart for three radio telephones 3□, in reality, each of them operates non-periodically.

Outside line 4. -4r, for example, the external line 41, the controller 103 in the main device 1 detects the incoming call from the external line trunk 101, and connects the connecting devices 2, -2o.
Among them, the standby mode identifies the connected device that is in the standby state and connects the identified connected device, for example, connected device 2. to send an incoming call signal.

Note that "the connected device is in the standby state" here means that the number of control channels of a telephone line is usually limited to 1 to 2 channels, so it means that among the free connected devices that are not used for calls, Refers to a connection device to which the control channels are set according to preset priorities.

The incoming call signal transmission instruction signal from the main device 1 is sent to the connecting device 2.
, the controller 202 identifies whether the control channel is empty/occupied at that time, and if it is empty, sends an incoming call signal from the transceiver 201 to the control channel (if it is occupied). (If there is a waiting room, you will have to wait until a space is available.)

As described above, the connecting device 2. When an incoming call signal is sent to the control channel, the radio telephones 31 to 3 that are performing the intermittent monitoring operation of the control channel in the above operation respond to each of the first incoming call signals after the incoming call signal is sent out. When the transceiver 301 receives the incoming call signal at monitoring time T2 and T3, and the controller 304 confirms the reception of the incoming call signal, in step In step (3), a communication channel designation signal (a signal specifying the communication channel to be used) is waited for from the connection device 2I. Also, controller 3
04 is the same as the conventional example, from the monitoring time T2 to T3, the intermittent monitoring operation of the wireless telephones 31 to 3.0 control channels is continuous monitoring operation (the reception state is changed so that the signal sent to the control channel can be detected immediately). (behavior that continues).

When the controller 103 of the main device 1 receives the above-mentioned call response signals from all the wireless telephones 31 to 3□ via the connection device 21, it identifies the communication channels that are free at that time and selects one of them. Connecting device 2. sends a designated communication channel designation signal. to the controller 202. This allows connecting device 2. transmits a speech channel designation signal from the transceiver 201 to one of the radio telephones 31 to 3o, 3k, via the control channel.

As described above, when the communication channel designation signal is sent from the connecting device 2□, the wireless telephone 3. Then, the transmitting/receiving unit 301 receives this, the controller 304 identifies the reception of the communication channel designation signal in step (2), switches the communication channel to the communication channel specified by the communication channel designation signal in step (2), and performs step (2). At step 2, a channel switching completion signal (a signal that notifies the main device 1 of completion of switching to a designated communication channel) is sent to the control channel, and at step 2, the CPU waits for reception of an incoming call display signal (crying signal). Furthermore, radio telephones other than the radio telephone 3 intercept the speech channel designation signal and switch to the designated speech channel. Therefore, wireless telephone 3. A channel switching completion signal is not sent from other wireless telephones.

Connection device 2. When the transmitter/receiver 201 receives a channel switching completion signal from the wireless telephone 3k, the controller 202 sends reception information of the channel switching completion signal to the main device 1, and upon receiving this, the controller 10 of the main device 1
3 instructs the connecting device 21 to send out the bell ringing signal RG. Connection device 2. In response to this instruction, the controller 202 transmits an incoming call display signal RG to the designated communication channel using the transmitter/receiver 201 at time T 7 and Ta. The incoming call display signal RG is sent in the on/off form of a bell ringing signal.

Wireless telephones 31-3. , when the transmitter/receiver 301 receives the incoming call display signal RG, the controller 304
In step ■■, the radio telephone 3. Incoming calls are indicated by an intermittent audible tone on ~3ffi. Along with this operation, the controller 304 moves the wireless telephone 3. ~3 Monitors whether the call button of □ is pressed or not, and also monitors whether a response operation (pressing of the above call button) is performed on another wireless telephone 3 in step [phase]. .

For example, if the call button of the wireless telephone 31 is pressed at time T5 and the incoming call is answered, the controller 304 of the wireless telephone 3 sends a response signal from the transmitter/receiver 301 to the call channel in step (3). At the same time, in step @, the AF10N signal from the main device 1 (in the main device 1, the incoming external line 4,
Waits for reception of a signal confirming the completion of setting the voice communication path between the terminal and the connecting device 21.

The connecting device 2 is a transmitter/receiver 201 that connects the wireless telephone 31 to the wireless telephone 31.
When a response signal is received from the controller 202, the response signal reception information is sent from the controller 202 to the main device 1. In the main device 1, the controller 103 reads the above reception information, controls the switch 102, and connects the external line trunk 1011 and the connecting device. 2
．． Sets up a communication path (wired line) between the connection device 2 and the controller 202, and instructs the controller 202 of the connection device 2 to send the AF10N signal, and the connection device 2□ sends the AF10N signal from the transceiver 201 to the communication channel. do. In the wireless telephone 3, when the transceiver 301 receives this AF10N signal and the controller 304 reads it, the controller 304 controls the transceiver 301 and sets a communication path to the transceiver 303 via the hybrid 302. Then, the phone enters a call state.

On the other hand, the wireless telephones 32 to 3 for which the call button was not pressed
．． , the controller 304 connects the connection device 2. By receiving the F10N signal and not pressing the own call button, in step [phase], the user knows that another wireless telephone, in this case, wireless telephone 3, has responded, and the caller returns to step Destroy the communication channel with @, set the control channel again, immediately start the continuous monitoring operation of the control channel at time T9, and set the timer (phase) that defines the continuous monitoring operation time in step [phase].
Set a soft timer), and by steps ① and ②, the connected device 2. (The connection device 21 is in a call with the wireless telephone 3.) It is monitored whether an incoming call signal is received from any of the connection devices 2k.

If an incoming call signal is not received within the specified time t5 according to the timer, the controller 3
04, at the time T1° at which time-over is detected in step (2), normal standby is controlled, that is, intermittent monitoring operation according to the period t1 of the control channel described above is started. That is, when no duplicate calls occur within a short period of time, the wireless telephones 32 to 3 that do not respond to the calls do not respond to the calls.
The standby mode will be controlled to take normal battery saving into consideration.

When an incoming call occurs on any of the outside lines 42 to 4r within the specified time t6, the main device 1 sends an incoming call signal to the control channel from one of the connecting devices 22 to 2o, for example, the connecting device 22, in the same manner as described above. control. This incoming call signal will be received by the radio telephones m 32 - 3 □, but the controller 304 of the radio telephones 32 - 3 ° has already completed the setting of the control channel at this time, and the signal transmitted to the control channel Therefore, the incoming call signal is immediately received by the transmitter/receiver 301 without waiting for the monitoring operation time to arrive as in the case of step (2), and the controller 304 receives the incoming call signal. When read, the timer is reset in step (2), and then control starts from step (2).

As is clear from the above operations, the radio telephones 32 to 3 other than those that responded to the incoming call immediately start receiving signals on the control channel from the time the other radio telephone 31 responds. l
Therefore, the transmission and reception of signals to and from the main device 1 at the time of incoming calls and the accompanying control are completed early, and for example, at time t4 in FIG. 3B,
As shown in the figure, the delay time for displaying the incoming call on the radio telephone after the second and subsequent incoming calls is shorter than the delay time t3 of the conventional example.

Although the above explanation is based on the example of incoming calls from outside lines 4□ to 4r, it goes without saying that incoming calls from extensions, door phones, etc. can be processed in the same way.

[Effects of the Invention] As explained above, the present invention is such that a wireless telephone other than the wireless telephone that responded to the incoming call continuously monitors the control channel for a set time from the time of answering the incoming call. , and if there are duplicate calls within a short period of time, 1
When one incoming call is answered, the time it takes for the remaining unanswered calls to be displayed on the unanswered wireless telephone is shortened, so even if there are duplicate incoming calls, you can quickly respond to the main one. The invention has extremely significant operational effects.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a flowchart showing the control of the embodiment shown in FIG. 1, and FIG. 3 is a time chart comparing the conventional example and the above embodiment. be. (Main symbols) 1... Main device 103... Controller 2, ~2o... Connection device 201... Transmitter/receiver 202... Controller 3
□~3°...Radio telephone 301...Transmitter/receiver 304...Controller 3
05... Incoming call indicator and 4 others

Claims (1)

[Claims] 1 A wireless telephone system consisting of a main device accommodating a telephone line, a plurality of connection devices connected to the main device by wire, and a plurality of wireless telephones connected to the connection device via a wireless line, the system comprising: During standby, the radio telephone intermittently monitors the control channel of the radio line between it and the connection device, and after the occurrence of an incoming call to the telephone line, the radio telephone will: The intermittent monitoring operation of the control channel is controlled to be converted to continuous monitoring operation, and the continuous monitoring control channel allows predetermined signals to be exchanged between the connection device and the radio telephone, thereby controlling the radio line. Responding to an incoming call in a wireless telephone system in which a call channel is set, the monitoring operation of the control channel of the wireless telephone is stopped, and an incoming call is displayed on the wireless telephone by an incoming call display signal sent through the call channel. The wireless telephone other than the wireless telephone that received the call starts the continuous monitoring operation of the control channel from the time the other wireless telephone responds to the incoming call, and after a set time, the continuous monitoring operation shifts to the intermittent monitoring operation. Monitoring method.