JPH04349743A - cordless communication system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of Industrial Application The present invention relates to a cordless telephone system consisting of a fixed station and a mobile station connected via a wireless line.

0002

2. Description of the Related Art Conventionally, in order to notify one mobile station to which one fixed station belongs of an incoming call, a notification of the incoming call is activated via a wireless control channel regardless of whether the mobile station is powered on or off. The call channel was monitored for responses.

[0003] Furthermore, when there are multiple sets of fixed and mobile equipment, it is impossible to use the control channel at the same time, so notifications of incoming calls are sent to the mobile equipment one after another at regular intervals. Ta.

0004

[Problem to be Solved by the Invention] However, in the conventional example, if there is no response to the notification of an incoming call, the power of the mobile device is off, so there is no response to the notification via the control channel, or the power of the mobile device is turned on. However, it was impossible to determine whether there was no response because the radio waves did not reach the station.

[0005] Furthermore, when notifying a mobile station of an incoming call via a control channel, it is necessary to retry the notification, especially when notifying multiple mobile stations.
It was often time consuming.

[0006]

[Means for Solving the Problems] According to the present invention, it is possible to omit notification of an incoming call from a fixed device to a mobile device whose power is not turned on. It is possible to be notified of incoming calls. Further, since unnecessary control channels are not used more than necessary, radio waves can be used effectively.

[0007]

Embodiment FIG. 1 is a system configuration diagram of an embodiment of the present invention. In the figure, 101 is a general subscriber line, 102 is a main device that accommodates a plurality of extension lines and external lines and has a line switching control function, 103 is an extension, 104 is a fixed device, and 105 is a mobile device, which is connected to the main device 102. The fixed device 104 has an extension (wired) 10
3, the mobile device 105 and the fixed device 104 are connected wirelessly. 106 is an extension line, 107 is a dedicated telephone, and the main device 102 and the dedicated telephone 107 are connected by the extension (wired) 106.

FIG. 2 is a block diagram of the main unit 102, in which 101 is a general subscriber line, and 201 is an outside line interface, which handles incoming calls from outside lines and outgoing calls to outside lines. Reference numeral 202 denotes an extension interface, which notifies the dedicated telephone 107 and the fixed device 104 connected to the extensions 103 and 106 of incoming calls, and handles requests for outgoing calls from the devices. 20
3 is an exchange section that connects the outside line and extension lines using a switch. 204 is an exchange control unit, which is connected to the above-mentioned 201, 202,
203 and performs the function of an exchange.

FIG. 3 is a block diagram of the fixing machine. In the figure, 103 is an extension line for connecting to the main device 102, 301 is an interface section for transmitting and receiving control signals and audio signals to and from the main device 102, and the signal transmission method is an analog or digital method. 302 is an audio processing circuit; 303 is a modulation/demodulation unit having a wireless circuit for wirelessly transmitting and receiving control signals and audio to the mobile device 105;
304 is an antenna, 305 is a line-side control signal transmitting/receiving circuit for exchanging control signals with the main device 102, and 306 is a control signal transmitting/receiving circuit for exchanging control signals with the mobile device. 307 is a memory for storing the status of various parts, 308 is a control unit that controls and monitors the above-mentioned parts, 309 is a power supply unit, 310 is a key input unit such as a setting key, and 311 is a call for the fixed machine. Identification ROM that stores codes
(Read-only memory), 312 is a liquid crystal display, LED
A display output section 313 is a speaker for audibly outputting the display output.

FIG. 4 is a configuration diagram of a mobile device, in which 401 is an antenna for transmitting and receiving radio signals, 402 is an antenna for wirelessly transmitting control signals and voice to a fixed device,
A modulation/demodulation section for reception; 403 is an audio processing circuit; 4
04 is a telephone receiver, 405 is a transmitter, 406 is a control signal transmitting/receiving circuit for exchanging control signals with the fixed device via a modulation/demodulation section, 407 is a control section for controlling and monitoring each section, and 408 is for storing a call code. The identification ROM 409 is a display output unit composed of a liquid crystal display, a light emitting diode, etc.
410 is a speaker for audible output of display output; 411
Reference numeral 412 represents a key input unit comprised of a keypad or the like for inputting dial numbers, etc., and 412 represents a power supply unit, which is turned on when a power switch 413 is turned on. The power is turned down by a control signal from the control unit 407 when the power switch 413 is turned off.

The configuration of the embodiment of the present invention has been described above with reference to FIGS. 1 to 4.

Next, the operation of the embodiment of the present invention will be explained using a flowchart.

FIG. 5 is a flowchart for explaining the operation of the main device 102 when there is an incoming call from an outside line in the embodiment of the present invention.

The exchange control unit 204 of the main device 102 usually
It monitors the arrival of incoming signals from outside lines. When an incoming call signal is detected, the process advances to step S501, and a specific fixed station designated in advance is notified of the incoming call. On the other hand, the fixed device uses a control channel to notify the mobile device of the incoming call.

When the fixed machine finishes using the control channel, it notifies the main unit 102 accordingly.

[0016] In step S502, when the exchange control unit 204 of the main device 102 receives a notification from the fixed device that the use of the control channel has ended, the process proceeds to step S503 and determines whether there is any other fixed device to which notification of the incoming call should be sent. If there is another fixed-line device that should be notified of the incoming call, the fixed-line device is designated in step S504, and the process returns to step S501.

[0017] When the notification to the fixed station that should be notified of the incoming call is completed in step S503, the switching control unit 204 proceeds to step S505 and monitors whether or not the incoming call from the outside line has ended. Here, if the incoming call to the main device 101 has ended, in step S506 all fixed devices are notified of the end of the incoming call, and the process moves on to other processing. If the main device 101 continues to receive calls in step S505, the process advances to step S507 to monitor whether or not there is a response to the calls from the fixed device. If there is no response here, the incoming call continues and the response is monitored in a loop of steps S505 and S507.

If a response occurs in step S507, the exchange control unit 204 forms a communication path to the fixed station that responded in step S508, and then proceeds to step S509.
After notifying other fixed devices that the incoming call has ended, the process moves on to other processing.

FIG. 6 shows step S50 in the explanation of FIG.
2 is a flowchart for explaining the operation of the fixed machine while the main device 102 is waiting for a notification from the fixed machine that the use of the control channel has ended.

First, in step S601, when there is a notification of an incoming call from the main device 102, the control unit 308 proceeds to step S602, specifies the mobile device to which the incoming call should be notified, and then returns to step S602.
Proceed to 603. Here, the control unit 308 refers to the memory 307 in the fixed device, checks whether the specified mobile device is powered on or off, and if it is on, proceeds to step S604.
, and notifies the designated mobile device of the incoming call using the control channel. On the other hand, if the mobile device is powered off in step S603, step S604 is skipped and the process proceeds to step S605.

[0021] In step S605, the control unit 308 determines whether there is any other mobile device that should be notified of the incoming call, and if there is,
In step S606, another mobile device that has not been notified of the incoming call is designated, and the process returns to step S603. Step S
If there is no other mobile device that should be notified of the incoming call at 605, the process advances to step S607, and if all the mobile devices that should be notified of the incoming call are powered off, the process proceeds to step S608.
Then, the speaker 313 of the fixed device 104 outputs a ringing tone, and the process advances to step S609. As a result, even if the power of the mobile device is off, it is possible to answer an incoming call using the mobile device by turning on the power of the mobile device after hearing the ring tone output from the fixed device. be.

[0022] In step S609, the controller 30 of the fixing machine
8 notifies the main device 102 that the use of the control channel has ended. This allows other fixtures to use the control channel. The control unit 308 then proceeds to step S610 and monitors whether any mobile device has responded to the incoming call. If no response occurs, the process advances to step S611, and it is monitored whether a notification of termination of the incoming call has been received from the main device 102. Step S6
11, a response by a mobile station belonging to another fixed station;
Alternatively, if the incoming call is terminated by a response from the wired dedicated telephone 107 or the like connected to the main device 102, or by abandonment on the calling side, the process advances to step S612, and all mobile devices belonging to the fixed device are Notify the end of the incoming call and move on to other processing.

[0023] Furthermore, if a response to the incoming call is generated from the mobile unit belonging to the fixed unit in step S610, the controller 308 of the fixed unit controls the main unit 1 in step S613.
Notify 02 of the response. And step S6
In step 14, a communication path is established between the mobile device that responded and the main device 102, and in step 615, the end of the call is notified to mobile devices other than the mobile device that responded, and the process moves on to other processing.

FIG. 7 is a flowchart for explaining a procedure for notifying a fixed device of a change in status when the mobile device's power source is turned on/off.

When the power of the mobile device is turned on by the operator operating the power switch 413 in step S701,
The control unit 407 proceeds to step S702 and determines whether the control channel is being used by another fixed device or mobile device. If the control channel is free, the control section 407 proceeds to step S703 and transmits power-on information and identification information (own device ID) to the fixed device via the control channel. When a power-on information registration confirmation signal is received from the fixed device in step S704, the process advances to step S705.

Step S705 is a normal call standby state, and if the power-on state of the mobile device is registered in the fixed device, the mobile device is also in a standby state for incoming calls. Step S determines whether the power-on state has been registered for the fixed device.
Since the confirmation can be made in step S704, if the confirmation is unsuccessful, the process returns to step S702 after an appropriate period of time has elapsed.

In the standby state, the presence or absence of outgoing/incoming calls is monitored in step S706. If a request to make a call occurs due to a key input on a mobile device, or if a notification of an incoming call from a fixed device arrives, the process advances to step S708, and the call/call request is made.
Process incoming calls, dial, and make calls. After the call ends, the process returns to the standby state loop of steps S705, S706, and S709.

In step S709, the control unit 407 monitors the presence or absence of a key input to instruct the power switch 413 to turn off the power.
Proceed to 710. In step S710, it is monitored whether the control channel is usable or not, and if it is not usable, it is determined in step S711 whether or not a timeout will occur. If the timeout has not occurred, the process returns to step S710. If a timeout occurs in step S711, the control unit 40
In step S713, the process proceeds to step S713, where the power is turned off and the process ends.

In step S710, if the control channel is available, the process advances to step S712;
The main control unit 407 transmits power-off information and identification information to the fixed device, turns off the power in step S713, and ends the process.

[0030] Furthermore, if the reception of the confirmation signal from the fixed device fails in step S704 in FIG. indicate.

In the system configuration of FIG. 1, the number of mobile devices belonging to one fixed device may be one instead of a plurality.

In the explanation of FIG. 6, the notification from the fixed device to the mobile devices is carried out sequentially one by one, but it is also possible to notify them all at once. However, in this case, the operation may be different depending on whether all mobile devices belonging to one fixed device are powered off or when there is at least one mobile device that is powered on.

Furthermore, in the system configuration of FIG.
02 and the fixing device 104 do not need to be separated.

That is, as shown in FIG. 8, one or more outside lines 805 (analog lines or digital lines) are connected directly to
It may be connected to a fixing device 804. And outside line 8
Mobile device 809 received a direct inline call from 05.
812 or a mobile device specified by a subaddress, the control unit 80
Step 8 is to avoid calling a mobile device whose power is off among the mobile devices to be called.

That is, the control unit 808 controls the mobile terminals 809 to 8 of the mobile terminals 809 to 812 in response to a specific incoming call.
11 is registered in the memory 807, the power on/off of the mobile devices 809 to 811 is registered in the memory 807.
Judgment is made by referring to 07. And mobile device 8
09 and 810 are on, and the mobile device 811 is off, the control unit 808 controls the control signal transmission/reception circuit 8.
06, the modulation/demodulation unit 803 and the antenna 814 sequentially make individual calls to the mobile devices 809 and 810 by designating their respective identification numbers via the control channel. on the other hand,
Even if calling the mobile device 811 is registered in advance, the calling will not be performed if the mobile device 811 is powered off.

[0036]

[Effects of the Invention] As explained above, by notifying the fixed device of status changes when the mobile device's power is turned on and off, the fixed device is powered off when an incoming signal arrives. Since it can be determined that there is no need to notify the mobile device of the incoming call, unnecessary occupation of the control channel can be restricted and the control channel can be used effectively.

[Brief explanation of drawings]

FIG. 1 is a system configuration diagram of an embodiment of the present invention.

FIG. 2 is a configuration diagram of the main device of the embodiment.

FIG. 3 is a configuration diagram of a fixing machine according to an embodiment.

FIG. 4 is a configuration diagram of a mobile device according to an embodiment.

FIG. 5 is a flowchart for explaining the operation of the main device of the embodiment.

FIG. 6 is a flowchart for explaining the operation of the fixing machine of the embodiment.

FIG. 7 is a flowchart for explaining the operation of the mobile device according to the embodiment.

FIG. 8 is a configuration diagram of a second embodiment.

[Explanation of symbols]

101 Wired line 102 Main device 104 Fixed machine 105 Mobile device 204 Exchange control unit 306 Control signal transmission/reception circuit 307 Memory 308 Control section 311 Identification ROM 406 Control signal transmission/reception circuit 407 Mobile device control unit 408 Identification ROM 412 Power supply section (battery) 413 Power switch

Claims (6)

[Claims] Claim 1. In a cordless telephone system consisting of a fixed device connected to a wired line and a mobile device connected to the fixed device via a wireless line, the mobile device A cordless telephone system characterized by notifying a fixed device of changes in its status. 2. The cordless telephone system according to claim 1, wherein said fixed device is connected to a main device having a line control function. 3. The fixed device has a memory for storing the state of the mobile device, and refers to the memory when receiving a call, and notifies the mobile device whose power is on of the incoming call. The cordless telephone system of claim 1. 4. The cordless telephone system according to claim 1, wherein when said mobile device is powered off, an incoming call display means included in said fixed device displays and outputs a notification of an incoming call. 5. The cordless telephone system according to claim 2, wherein when the mobile device is powered off, the fixed device notifies the main device of its absence. 6. The cordless telephone system according to claim 1, wherein the fixed station sequentially notifies the mobile stations whose power is on among the plurality of mobile stations of the incoming call.