JPH07312782A - Cordless telephone device - Google Patents

Abstract

(57) [Abstract] [Purpose] In a cordless telephone device accommodating a cordless extension including a connection device 2 and a wireless telephone 3, the same wireless control channel is used without frequent control channel selection control and expensive circuit configuration. The purpose is to avoid conflict with the equipment used. [Structure] Detecting a case where an incoming call from the connection device 2 to the wireless telephone 3 or a call from the wireless telephone 3 to the connection device 2 cannot be made because the set control channel is not available, and the number of times is counted. , If the count value reaches a predetermined value within a predetermined time, the connection device 2 and the wireless telephone 3
The control channel used between and was changed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone device.

[0002]

2. Description of the Related Art Conventionally, in a cordless telephone device,
The wireless control channels used by the connection device and the wireless telephone are set in advance. When receiving a call or making a call from a slave (wireless telephone), the set wireless control channel is used to wirelessly connect between the connection device and the wireless telephone. Communicating.

[0003]

However, the above-mentioned conventional example has the following drawbacks.

(1) Near the cordless telephone device,
When a device that uses the same wireless control channel is operating, there is no control channel between the extension connection device and the wireless telephone when an external call arrives, so wireless communication cannot be performed and incoming operation cannot be performed. . Further, the more frequently the devices using the same radio control channel operate, the more difficult it becomes to perform an incoming call operation or an outgoing call operation.

(2) Therefore, in order to avoid the disadvantage of (1), it is possible to search for an empty control channel each time the wireless communication is started, but it takes time to determine the control channel to be used. , Incoming and outgoing operations become slow.

(3) Therefore, in order to avoid the drawback of (2), a plurality of wireless circuits are required in each of the connection device and the wireless telephone, resulting in an increase in cost.

It is an object of the present invention to provide a cordless telephone device capable of avoiding competition with equipment using the same radio control channel without using frequent control channel selection control or expensive circuit configuration. And

[0008]

According to the present invention, in a cordless telephone apparatus comprising a connecting device and a wireless telephone, there is no free control channel set, so that an incoming call from the connecting device to the wireless telephone or a connection from the wireless telephone is made. Counting means for detecting the number of times when the call cannot be transmitted to the device, counting means for detecting the number of times, detection means for detecting that the count value by the counting means reaches a predetermined value within a predetermined time, and the count value It has a changing means for changing the control channel used between the connection device and the wireless telephone when it reaches a predetermined value.

[0009]

1 is a block diagram showing the system configuration of a first embodiment of the present invention.

As shown in the figure, the cordless telephone device of this embodiment has a connection device 2 having an interface with a line.
And a cordless telephone including the wireless telephone 3.

The main unit 1 has an outside line interface circuit 11 having an interface with a telephone line, a switch circuit 12 for connecting a communication path, an extension line interface circuit 13 having an interface with an extension terminal, and the main unit 1 And a control unit 14 for controlling the whole of the.

Further, the connection device 2 sends the control information and the like from the main device 1 to the extension radio telephone 3 and the radio telephone 3
Control information and the like from the main device 1 to the main device 1.
A line interface circuit 21 for controlling communication with a signal processing unit 22 for performing signal conversion between wired and wireless, a wireless circuit 23 and an antenna 24 for transmitting and receiving wireless signals,
The control unit 25 controls the entire connection device 2.

The radiotelephone 3 also includes an antenna 31 and a radio circuit 32 for transmitting and receiving radio waves, a signal processor 33 for converting radio signals and voice signals, and the like.
, A speaker 35 for listening to the voice of the other party, and a microphone 36 for inputting this voice.
Have and.

In the above structure, the external line interface circuit 11 detects an incoming call from the telephone line, and the control unit 14 processes the incoming call operation start request for the wireless telephone 3 to the connection device 2 via the internal line interface circuit 13. .

Here, the connection device 2 checks the availability of the control channel before sending the incoming operation start request from the wireless circuit 23. FIG. 2 is a flowchart showing the processing in the control unit 25 in this case, which will be described below with reference to FIG.

First, the control unit 25 starts the control channel idle monitoring time timer (S1), and before the time-out (S2), checks whether or not a preset control channel is available in the connection device 2 (S5). ), If no vacancy can be detected within the time, the process proceeds to S3, one is added to the error count, and a retransmitting process is performed as the wireless transmission disabling process, or a process such as notifying the main device 1 that the incoming operation is disabled is performed.

If it is possible to detect an empty control channel in S5, the process proceeds to S6, and it is checked whether the error count is equal to or more than a predetermined value. ). As shown in FIG. 7, in this sequence for a normal incoming call request, the wireless telephone 3 returns an incoming call response to an incoming call request from the connection device 2 using a preset control channel.

If the error count is equal to or greater than the predetermined value, it is determined that the installation environment is not suitable for the preset control channel, and the control channel used between the connection device 2 and the wireless telephone 3 is changed. Incoming operation request processing accompanied by processing is performed (S8).

In the processing in this case, as in the sequence shown in FIG. 3, the connection device 2 first uses a preset control channel to add a control channel change instruction to the incoming call request and sends the change request. Wait for a response on the control channel.
On the other hand, when the wireless telephone 3 receives the request, it returns an incoming call response using the control channel instructed to change. Then, when the connection device 2 receives the incoming call response, it returns a response confirmation to the wireless telephone 3 and notifies that the control channel to be used in the future has been changed.

Upon receiving the response confirmation, the wireless telephone 3 can confirm that the incoming response transmitted earlier is normally received, and completes the change of the control channel to be used in the future. Although not shown, the error count is reset when the control channel change is completed or when a predetermined time has elapsed.

While the operation upon receiving a call has been described as the first embodiment of the present invention, the operation upon making a call will be described as the second embodiment of the present invention. The system configuration is the same as that of the first embodiment.

In the second embodiment, when there is a calling operation from the wireless telephone 3 due to off-hook or the like, the control section 34 checks the availability of the control channel before sending the calling operation request from the wireless circuit 32. The processing in this case is similar to the operation at the time of the incoming call in FIG.

If the error count is less than the predetermined value in S6, the normal call origination operation request process is executed in S7. The sequence of the normal call origination operation in the second embodiment is as shown in FIG. , The connection device 2 returns a call response in response to a call request from the wireless telephone 3 using a preset control channel.

If the error count is greater than or equal to the predetermined value in S6, it is determined that the installation environment is not suitable for the preset control channel, and in S8, the connection environment is used between the connection device 2 and the wireless telephone 3. A call origination operation request process accompanied by a control channel change process to be performed is performed.
As shown in the sequence (1), the wireless telephone 3 first adds a control channel change instruction to the call origination request using a preset control channel and sends it, and waits for a response on the control channel for which the change instruction has been issued.

On the other hand, when the connection device 2 receives the request, it returns a call origination response using the control channel instructed to change. Upon receiving the transmission response, the wireless telephone 3 returns a response confirmation to the connection device 2 and notifies that the control channel to be used in the future has been changed. As a result, the wireless telephone 3 can confirm that the previously received incoming call response has been normally received by receiving the response confirmation, and the change of the control channel to be used in the future is completed.

Next, a third embodiment of the present invention will be described. The system configuration is the same as that of the first embodiment.

In each of the above embodiments, the control channel changing process is performed when the error count is equal to or greater than a certain value at the time of sending the request. However, even when the response is returned when the request is received, Similarly, the control channel changing process can be performed.

FIG. 5 shows a sequence for changing the control channel at the time of answering an incoming call.

In the figure, when the incoming call request from the connection device 2 is received, the wireless telephone 3 adds a control channel change instruction to the incoming call response and sends it out according to the result of comparison with the above-mentioned error count. Wait for a response on the control channel.

When receiving the response acceptance, the wireless telephone 3 returns an acceptance confirmation to the connection device 2 and notifies that the control channel to be used in the future has been changed. As a result, the connection adapter 2 can confirm that the response reception sent earlier is normally received by receiving the reception confirmation, and the change of the control channel to be used in the future is completed.

Next, a fourth embodiment of the present invention will be described. The system configuration is the same as that of the first embodiment.

In the third embodiment described above, the case of changing the control channel at the time of answering an incoming call has been described. In the fourth embodiment, the case of changing the control channel at the time of answering an outgoing call will be described.

FIG. 6 shows a sequence in the case of changing the control channel at the time of calling response.

In the figure, when a call origination request is received from the wireless telephone 3, the connection unit 2 adds a control channel change instruction to the call origination response according to the result of comparison with the above-mentioned error count and sends it out. Wait for a response on the channel.

On the other hand, when the connection device 2 receives the response acceptance, it returns an acceptance confirmation to the wireless telephone 3 and notifies that the change of the control channel to be used in the future has been completed. Upon receiving the acceptance confirmation, the wireless telephone 3 can confirm that the previously received response acceptance is normally received, and completes the change of the control channel to be used in the future.

The present invention has been described above with respect to the cordless telephone device connected to the extension of the button telephone system.
The present invention can be applied to a cordless telephone device directly connected to a public line.

[0037]

As described above, according to the present invention,
It can be changed to automatically use the optimum control channel according to the installation environment without using frequent control channel selection control or expensive circuit configuration, and communication failure at the time of outgoing and incoming calls can be prevented. There is an effect that it is possible to reduce the trouble that a call cannot be made when the wireless telephone is used and the trouble that the telephone does not ring when receiving an outside line.

[Brief description of drawings]

FIG. 1 is a block diagram showing a circuit configuration of a cordless telephone device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a request transmission operation by a control channel in the above embodiment.

FIG. 3 is a sequence chart showing a control channel changing operation when an incoming call is requested in the above embodiment.

FIG. 4 is a sequence chart showing a control channel changing operation at the time of a call origination request in the embodiment.

FIG. 5 is a sequence chart showing a control channel changing operation at the time of answering an incoming call in the embodiment.

FIG. 6 is a sequence chart showing a control channel changing operation at the time of a call origination response in the embodiment.

FIG. 7 is a sequence chart showing a normal operation when an incoming call is requested in the above embodiment.

FIG. 8 is a sequence chart showing a normal operation at the time of a call origination request in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Main device, 2 ... Connection device, 3 ... Wireless telephone, 11 ... External interface circuit, 12 ... Switch circuit, 13 ... Extension interface circuit, 14, 25, 34 ... Control part, 21 ... Line interface circuit, 22, 33 ... signal processing unit, 23, 32 ... wireless circuit, 24, 31 ... antenna, 35 ... speaker, 36 ... microphone.

Claims (5)

[Claims] 1. In a cordless telephone device, the number of times is detected when the incoming call from the connection device to the wireless telephone or the outgoing call from the wireless telephone to the connection device cannot be performed because the set control channel is not available. Counting means for counting the number; and detection means for detecting that the count value by the counting means reaches a predetermined value within a predetermined time;
A cordless telephone device comprising: a changing unit that changes a control channel used between the connection device and the wireless telephone when the count value reaches a predetermined value. 2. The connection device according to claim 1, when the incoming call is received, when the counting means and the detecting means determine that the count value has reached a predetermined value, the connection device outputs a request for changing a control channel to be used to the wireless telephone. A cordless telephone device, comprising: 3. A request for changing a control channel to be used from a wireless telephone to a connection device when the counting unit and the detection unit determine that the count value has reached a predetermined value when an incoming call arrives. A cordless telephone device, comprising: 4. The control channel to be used from the wireless telephone to the connection device according to claim 1, when the counting unit and the detecting unit determine that the count value has reached a predetermined value at the time of making a call from the wireless telephone. A cordless telephone device having change request means for outputting a change request. 5. The control channel to be used from the connection device to the wireless telephone according to claim 1, when the counting means and the detecting means determine that the count value has reached a predetermined value at the time of calling from the wireless telephone. A cordless telephone device having change request means for outputting a change request.