JPH0289442A - Incoming/outgoing call control system for radiotelephony equipment - Google Patents

Abstract

PURPOSE:To apply a control at incoming/outgoing call without lowering the service life of a battery by using one of plural control channels as an exclusive channel for receiving an incoming signal and using other control channels for exclusive use of sending/receiving a signal other than the incoming signal. CONSTITUTION:A master equipment 1 is connected to a wired telephone channel 5 and a radiotelephony equipment 2 is connected to the master equipment 1 through a radio channel. The master equipment 1 and the radiotelephony equipment 2 applies connection control through a control channel and use an idle speech channel among plural call channels to apply communication. Two control channels A-CH, B-CH used for receiving an incoming signal only and used for sending/receiving other signal than the incoming signal are respectively provided, and the control channel A-CH monitors an incoming signal from the master equipment 1 and an incoming signal from the radiotelephony equipment 2 in a standby state. Thus, the control at outgoing/incoming call is applied without lowering the service life of the battery.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a multi-channel wireless telephone device.

(Prior Art) Conventionally, a wireless telephone consists of a parent v device connected to a wired line, and a wireless telephone connected to this parent device via a wireless line.
After performing call control between the parent device and the wireless telephone using one control channel, an empty channel among the multiple call channels is detected based on the received electric field strength, and a call is made using this empty call channel. Radiotelephone devices designed to do this are known.

FIG. 3 is a flowchart showing the call making/receiving operation of the wireless telephone in such an N-line telephone device, and if it detects an incoming call signal from the parent device or an off-hook call operation while in the standby state ( 31), it is checked whether the control channel used for connection control is free (S2>), and if it is, the control channel is used to execute the call/receive connection procedure (S3).However, if it is not free, Checks a timer for waiting for a free control channel, and if the timer has not timed up, checks again for a free control channel (S4).

However, if the timer has timed up, a busy tone is used to notify that the control channel is blocked and connection is impossible (S5), and the standby mode returns again.

Incidentally, this type of S-less telephone ti device is often used in close proximity to each other, as shown in FIG. That is, the first set of wireless telephone devices 3 consisting of the parent device 1 and the wireless telephone 2, the same < 11 equipment 1' and the wireless telephone 1 m2'
The second set of no S! This is a case where the telephone 3' is placed close to the telephone 3'. In such a mode of use, there will be a portion where the wireless zones 4, 4' of the parent devices 1 and 1' overlap. Therefore, for example, when the first set of wireless telephones 2 start making/receiving calls in the overlapping wireless zones, the second set of parent devices 1' determines that the control channel is blocked, and It becomes impossible to make or receive calls to or from the wireless phone 2' belonging to the zone 4'.

Therefore, it is conceivable to increase the number of control channels to, for example, two, A-CH and B-CH, and to perform connection control using the vacant control channel during a Us call.

(Problem to be solved by the invention) However, when there are two control channels, A-CH and B-CH, when a call arrives from a wired line, the parent device uses one of the control channels to send the incoming call signal. will be sent. On the other hand, no S! Since the telephone does not know on which control channel the incoming call signal will arrive,
The two control channels A and B must be received alternately and intermittently. At this time, the length of the incoming call signal is the same as when there is only one control channel, so in order to ensure that the incoming call signal can be received on both control channels, the length of the incoming call signal is the same as in the case of one control channel. In contrast to the on-time tl+t2 of the receiver when there is only one control channel, the receiver must be powered on for twice as long as the on-time tl+t2, as shown in FIG. 3(b). As a result, a problem arises in that the battery life of the radio telephone is reduced.

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical call control system for an S-less telephone that can control call origination and reception without reducing battery life even when a plurality of control channels are used.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a plurality of control channels, uses one of the plurality of control channels exclusively for receiving incoming signals between the parent device and the wireless telephone, and uses other control channels to is configured by being used exclusively for transmitting and receiving signals other than incoming signals.

(Operation) The parent device and the wireless telephone use one of the plurality of control channels exclusively for receiving incoming signals.

Therefore, the radio telephone only needs to receive intermittently only one control channel dedicated to receiving incoming signals, and the battery can be used efficiently as in the case where there is only one control channel. In addition, even when multiple sets of wireless telephone devices are placed in close proximity, it is possible to make or receive calls, reducing call losses due to blockage of control channels.
Traffic from the perspective of the entire system is averaged, improving usage efficiency.

(Embodiment) FIG. 1 is a block diagram showing an embodiment of the present invention, which is composed of a parent device 1 and a wireless phone 2, and the parent device f1 is a mobile telephone 2.
! Connected to telephone line 1i15.

Parent@1 includes a hyper-rad circuit 6, a control circuit 7, a synthesizer 8, a transmitter 9, a transmitting antenna 10, and a receiver 11.
, a receiving antenna 12, and a speaker 13.

On the other hand, no #j! Telephone 2 has receiving antenna 15 and receiver 1
6, synthesizer 17, transmission antenna 18, transmission f11
9, a control circuit 20, a transmitter 21, a receiver 22, and a sounder 23.

In the above configuration, the signal sent from the LiA telephone line 5 becomes the modulation input of the transmitter 9 via the hybrid circuit 6. The radio waves modulated by the transmission 119 are transmitted from the transmission antenna 10 toward the S-free telephone 12. on the other hand.

The radio waves transmitted from the wireless telephone 1!2 are sent to the receiving antenna 12.
The signal is received by the receiver 11 and demodulated by the receiver 11. The demodulated signal is sent to the wired telephone line 5 via the hybrid circuit 6.

Synthesizer 8 outputs a carrier wave of a frequency corresponding to a wireless channel to transmitter 9 and receiver 1111. One of the outputs of the receiver 11 is input to the control circuit 7 as reception data such as an identification code (ID code) included in the reception signal. By controlling the synthesizer 8, the control circuit 7 performs controls such as controlling the wireless channel and sending a transmission data signal to the transmitter 9 as a modulation input.

On the other hand, the demodulated output of the receiver 16 of the radio telephone 2 is output to the receiver 22. Furthermore, the voice input from the transmitter 21 becomes a modulated input to the transmission 119 and is transmitted from the transmission antenna 18. The synthesizer 17 is the same as the one in the assembly part @1, and the control circuit 20 controls the S-less telephone 2.

Here, Kumibu [1 and wireless telephone! The fi2 has two control channels: a control channel A-CH used exclusively for receiving incoming signals and a control channel B-CH used exclusively for sending and receiving signals other than incoming signals. The incoming signal from the parent device 1 or the incoming signal from the master device 12 is monitored on channel A-CH.

FIG. 2 is a flowchart showing the operation of the wireless telephone fi2 in the above configuration during optical communication.

First, the Ill device 1 is available! Until a ringing signal from the telephone line 5 is detected, the frequency of the synthesizer 8 is alternately switched between the frequency of the control channel A-CI-1 and one of the communication channels, and the frequency of the synthesizer 8 is switched alternately to the frequency of the control channel A-CI-1 and one of the communication channels, and the frequency of the synthesizer 8 is switched to the frequency of the control channel A-CI-1 and one of the communication channels, and the frequency of the synthesizer 8 is switched to the frequency of the control channel A-CI-1 and one of the communication channels.
The receiver 11 monitors the arrival of an incoming signal from the telephone 112. In addition, for the call channel, an empty channel detection is performed to determine whether the call channel is empty or not.

On the other hand, the control circuit 20 of the radio telephone 2 is connected to the synthesizer 17.
is set to the frequency of control channel A-CH, and receiver 1
6 is placed in an intermittent reception state on the control channel A-CH, and the arrival of an incoming signal from the group @1 is monitored, as well as the call origination operation by a hook switch (not shown).

In the above standby state, the control circuit 2 of the wireless telephone 2
When the hook switch 0 detects a call operation, it determines that it should proceed to the call operation (Sl), checks the free status of the control channel B-CH (S2), and if it is free, switches the synthesizer 17 to that control channel B-CH. -CH frequency, and the transmitting 1f 119 moves to the outgoing connection operation (S3). However, if the control channel 8-CH is not vacant, a timer for waiting for a vacant space is checked, and if the timer has not timed up, the control channel B-CH is checked again to see if it is vacant (S4). vice versa,
If the timer has timed up, the sounder 23 generates a busy sound indicating that the control channel B-CH is blocked and connection is not possible, and the standby state returns again (
S5).

Next, in the standby state, if the arrival of an incoming signal from the parent device 1 is detected on the 1blJ control channel ACH dedicated for incoming signals (86), then the other control channel B-
It is checked whether or not the CH is free (86), and if it is, the control channel B-CH is used to return an incoming call response signal (S8). However, if the control channel B-CH is not empty, the timer for waiting for the vacancy is checked (89), and if the timer has not expired, the vacancy status of the control channel B-CH is checked again, and when the timer becomes empty, the incoming call is answered. The process moves on to incoming call connection operations such as sending and receiving signals. However, if the timer has timed up, the sounder 23 emits a message indicating that the connection is not possible due to the blockage of the control channel BCH, and the standby state returns (810).

The above operations are similarly performed in the parent device 1. Therefore, group W11 and no II! Since all of the telephones 112 are on standby on the control channel A-CH dedicated to receiving incoming signals, the same battery saving as when there is only one control channel is possible.

Further, even if other sets of radio telephone devices are placed in close proximity, if the B-CH dedicated to outgoing call control is vacant, outgoing calls can be made, and the situation where neither optical calls nor incoming calls are possible is eliminated. Note that if the incoming call control periods using A-CH completely overlap, a ring tone is generated from the speaker 13 of the parent device to notify the user of the wireless telephone 112 that there is an incoming call. After that, it is possible to receive an incoming call by making a call using the mobile phone 191. Moreover, although the case where there are two control channels, A-C)-1 and B-CH, has been described, there may be three or more control channels.

〔Effect of the invention〕

As explained above, according to the present invention, one of the plurality of control channels is used exclusively for receiving incoming signals to perform connection control, making it possible to achieve the same battery saving as when there is only one control channel. In addition, even when multiple sets of S-free telephone devices are placed close to each other, an increase in call losses due to control channel blockage can be prevented, and each set of S-free telephone devices can be
The usage efficiency of the telephone device can be improved.

4. 1ti1$1 Explanation of the Drawings Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a flowchart showing call originating/receiving operations in the embodiment, and Fig. 3 is a block diagram showing an embodiment of the present invention.
The figure is a flowchart showing the conventional call/receive operation, and FIG. FIG. 5 is a block diagram showing an example of a system in which telephone devices are arranged in close proximity. FIG. 5 is a time chart showing the intermittent reception operation of the receiver when the number of control channels is one and two.

DESCRIPTION OF SYMBOLS 1... Parent device, 2... Wireless telephone device, 4... Wireless zone, 5... Telephone line, 7, 20... Control circuit, 8.17... Synthesizer, 9 .19...
Transmitter, 11. 16... Receiver, 21... Transmitter,
22...Telephone receiver, 23...Sounder.

Figure 2

Claims (1)

[Claims] Consisting of a parent device connected to a wired line and a wireless telephone connected to the parent device via a wireless line, the parent device and the wireless telephone perform connection control via a control channel, and In a radiotelephone device configured to make a call using an empty call channel among call channels, a plurality of the control channels are provided, and one of the plurality of control channels is used between the parent device and the radiotelephone. 1. A call originating/receiving control method for a wireless telephone device, characterized in that the control channel is used exclusively for receiving incoming signals, and other control channels are used exclusively for transmitting and receiving signals other than incoming signals.