JPH0752983B2 - Cordless phone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a wireless telephone and a cordless telephone having a fixed device, which are connected to each other via a wireless line.

(Prior Art) In this type of cordless telephone, a pair of a wireless telephone and a fixed device is fixed in advance, and a specific identification code is provided in advance in each of the wireless telephone and the fixed device. Only when they match with each other, the connection between the two is made. This identification code is a code required to prevent an erroneous connection between the wireless telephone and the fixed device, and is generally given so as to be unique in cordless telephones having the same frequency band. Since the fixed device can always identify the wireless telephones that make up the pair by the identification code, it is not necessary to recognize that there are a plurality of wireless telephone configurations and service types. Note that the configuration and service type of the wireless telephone indicates a service function other than the most basic telephone service function, or an applied service added to this telephone service function. There are types of function implementation methods, non-telephone services, etc.

On the other hand, recently, cordless telephones have also been diversified in structure, and cordless telephones having a parent-child type telephone configuration in which a plurality of wireless telephones are connected to one fixed device have been developed. A multi-zone cordless telephone has also been proposed, which can be configured with any pair at any time.

(Problems to be Solved by the Invention) As described above, the wireless telephone can access a plurality of fixed devices, and the fixed device can arbitrarily connect with one wireless telephone among the plurality of wireless telephones. In various configurations of cordless telephones, various combinations are possible between a fixed device and a wireless telephone. In this case, for example, one wireless telephone has a confidential communication function and another wireless telephone does not have a confidential communication function. If the functions of the wireless telephones and fixed devices, that is, the configurations and service functions, are different for each wireless telephone and fixed device, it is necessary for each fixed device and wireless telephone to store the difference in each function and configuration. However, such a method of storing the differences in functions and configurations of each fixed device and wireless telephone makes the device configuration complicated and is uneconomical. There is a problem that

The present invention has been made in view of the above circumstances, and an object thereof is a cordless system that can appropriately and economically perform each function when the functions and configurations of the wireless telephone and the fixed device are different from each other. To provide a telephone.

[Structure of Invention]

(Means for Solving the Problems) In order to achieve the above object, a cordless telephone according to the present invention is a cordless telephone having a wireless telephone and a fixed device connected to each other via a wireless line. When and have a function that can be selectively activated, the fixed device and the wireless telephone, in addition to the connection control information necessary for this connection, when connecting the wireless line between them, respectively. Each has control information transmitting means for transmitting control information indicating its own function to the other party, receives the control information transmitted from the control information transmitting means of each partner, and based on the received control information Each device has an execution unit that determines the selection of the selectively activating function and executes a control operation for the function that is determined to be activated. And are the gist.

(Operation) In the cordless telephone of the present invention, when the wireless telephone and the fixed device have a function capable of being selectively activated, the fixed device and the wireless telephone are necessary for connecting the two to each other. In addition to the connection control information, each transmits control information indicating its own function, and the wireless telephone and the fixed device of the other party receive the control information, and each device selects the selective information based on the received control information. The selection of the function that can be activated is determined, and the control operation for the function that is determined to be activated is executed.

(Examples) Examples of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 are explanatory diagrams showing the flow of call originating and receiving operations of the cordless telephone according to the embodiment of the present invention, and FIGS. 3 and 4 are respectively diagrams of FIG. 1 and FIG. It is a circuit block diagram which shows the structure of the fixed device and wireless telephone for cordless telephones which implement operation.

First, the configuration of the fixing device will be described with reference to FIG. The fixed device 12 shown in the figure is connected to a telephone line 29, and is connected to a 2-line to 4-line conversion circuit 21 for converting 2 lines of the telephone line into 4 lines and to the 2-line to 4-line conversion circuit 21. Baseband processing circuit 22 and this baseband processing circuit 22
Switch circuits 23a and 23b connected to the transmitter / receiver radio circuit 24 connected to the baseband processing circuit 22 via the switch circuits 23a and 23b, and the transmitter / receiver radio circuit 24.
An antenna 25 connected to the baseband processing circuit
22, a control CPU 27 connected to the switch circuits 23a and 23b and the transceiver radio circuit 24, and a memory 28 connected to the control CPU 27.

The radio telephone 11 shown in FIG. 4 is connected to an antenna 43 for receiving transmission information from the antenna 25 of the fixed device 12 and transmitting information to the antenna 25, and is connected to the antenna 43. A transceiver radio circuit 31, a switch circuit 32a, 32b connected to the transceiver radio circuit 31, a receiving baseband circuit 33 connected to the one switch circuit 32a, and the other switch circuit 32b The transmitted baseband circuit 34, the receiver 40 connected to the receiver baseband circuit 33, the transmitter 41 connected to the transmitter baseband circuit 34, and the transceiver radio circuit 31 , Switch circuits 32a, 32b, receiving baseband circuit 3
3 and control C connected to the transmitting baseband circuit 34
PU35 and memory 3 respectively connected to this control CPU35
6, a dial key 37, a display panel 38, and a sounder 39.

In the configuration as described above, an incoming call from the telephone line 29 is supplied from the 2-wire-4 wire conversion circuit 21 of the fixed device 12 to the baseband processing circuit 22 and baseband-processed, and the control CPU 27 and The data is transmitted from the antenna 25 to the wireless telephone 11 via the transceiver radio circuit 24 under the control of the memory 28.

The incoming call thus transmitted from the antenna 25 of the fixed device 12 is received by the transmission / reception radio circuit 31 via the antenna 43 of the wireless telephone 11, and is transmitted from the sounder 39 under the control of the control CPU 35 and the memory 36. A ringing tone is output. When the called party on the wireless telephone 11 side responds to the ringing tone, the incoming call from the telephone line 29 is connected to the wireless telephone 11 via the fixed device 12, and the called party of the wireless telephone 11 sends his or her handset 40 and the transmitter. It is possible to talk with a caller (not shown) on the telephone line 29 side via the telephone 41.

When the caller on the side of the wireless telephone 11 makes a call, this outgoing call is transmitted from the transceiver radio circuit 31 of the wireless telephone 11 to the fixed device 12 via the antenna 43 under the control of the control CPU 35 of the wireless telephone 11. Sent to. Wireless phone 11 antenna
The outgoing call transmitted from 43 is received by the transceiver radio circuit 24 via the antenna 25 of the fixed device 12, and is transmitted to the called party (not shown) via the telephone line 29 under the control of the control CPU 27. By calling the called party and answering the called party, the calling party from the wireless telephone 11 can talk with the called party through the fixed device 12 and the telephone line 29.

Next, the operation of the embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a plurality of wireless telephones 11 and fixed devices 12 are provided, and each wireless telephone 11 and fixed device 12 includes, as an example, a device equipped with a confidential circuit and a device not equipped with the confidential circuit. I will explain the multi-zone cordless phone that is doing. Further, in the multi-zone cordless telephone, it is necessary to use the identification code by a method different from that of the one-to-one cordless telephone in order to control the connection between the wireless telephone 11 and the fixed device 12. However, the essence of the present embodiment Therefore, here, the wireless telephone 11 has the identification code 1a, and the fixed device 12 has the identification code 1a.
It will be described as having 1b.

First, a case where the wireless telephone 11 having the confidential circuit makes a call to the fixed device 12 having the confidential circuit will be described with reference to FIG.

When the wireless telephone 11 makes a call to the fixed device 12,
The calling signal 1c is transmitted from the antenna 43, but the wireless telephone 11
The call signal 1c is provided with an identification code 1a indicating the calling wireless telephone 11 itself and an identification code 1b identifying the fixed device 12 of the calling destination, and also has a confidential circuit. Then, the confidential circuit holding code 1e indicating the above is added and transmitted to the fixing device 12.

The fixed device 12 receives the calling signal 1c transmitted from the wireless telephone 11 via the antenna 25, and the calling signal 1c is received.
Confirm that the identification code 1b representing the fixed device 12 of the calling destination matches the identification code 1b stored in the fixed device 12 itself, and if they match, the wireless telephone 11 of the calling source is confirmed. The call response signal 1d is returned to the terminal. In this case, the fixing device
12 is the identification code 1b of the fixed device 12 in the call response signal 1d.
In addition to the identification code 1a of the calling wireless telephone 11 and the fixed device 12 has a confidential circuit, the confidential circuit holding code 1f indicating that the confidential service can be provided during a call is provided. Send. Note that the wireless telephone 11
In the case of a multi-channel system having a control channel and a call channel individually in the wireless circuit between the fixed device 12 and the fixed device 12, the fixed device 12 transmits the call response signal 1d including the call channel designation signal 1g. .

The call response signal 1d returned from the fixed device 12 is received by the wireless telephone 11, and the wireless telephone 11 receives the call response signal.
When it is confirmed that 1d is addressed to itself, the call response signal 1d
Detect the confidential circuit holding code 1f included in
The display panel of the wireless telephone 11 identifies that the confidential service is available and indicates that the confidential service is available.
Display at 38. Seeing this display, the caller of the wireless telephone 11 performs operations such as starting up the confidential circuit.

In the call operation from the wireless telephone 11 described above,
The wireless telephone 11 has a secret circuit, but the fixed device 12
When the fixed device 12 does not have the confidential circuit, the fixed device 12 adds the confidential circuit holding code 1f to the call response signal 1d to be returned.
Is transmitted to the wireless telephone 11 without adding. Therefore, the wireless telephone 11 receiving the call response signal 1d identifies that the call response signal 1d does not have the confidential circuit holding code 1f,
This confirms that the confidential communication service cannot be performed and notifies the caller.

Next, the operation when the wireless telephone 11 receives an incoming call will be described with reference to FIG.

The fixed device 12 having the confidential circuit sends an incoming call signal 1h to the wireless telephone 11 when receiving an incoming call to the wireless telephone 11. This call-in signal 1h is the same as in the above-mentioned call-out operation, the identification code 1a of the call-destination wireless telephone 11 and the fixed device 12 of the caller.
In addition to the identification code 1b of No. 1, the fixed device 12 is transmitted with the confidential circuit holding code 1f indicating that it has a confidential circuit. When the wireless telephone 11 receives the incoming call signal 1h, the wireless telephone 11 detects that the confidential circuit holding code 1f is included in the incoming call signal 1h, and the wireless telephone 11 itself has the confidential circuit. Incoming call response signal 1 in which the confidential circuit holding code 1e shown is added together with the identification codes 1a and 1b
i is returned to the fixing device 12. When the fixed device 12 receives the incoming call response signal 1i, it detects the confidential circuit holding code 1e in the incoming call response signal 1i and activates the confidential circuit.

In the above-described incoming call operation, if the fixed device 12 does not have a confidential circuit, the confidential circuit holding code 1f is not added in the incoming signal 1h, and the wireless telephone 11 has a confidential circuit. If not, the confidential circuit holding code 1e is not added to the incoming call response signal 1i, so that the wireless telephone 11 and the fixed device 12 can recognize that the confidential service cannot be performed.

As described above, between the wireless telephone 11 and the fixed device 12,
Whether or not to use the confidential service, a call signal, a call response signal,
It is determined by whether or not there is a confidential circuit holding code in the incoming call signal and the incoming call response signal.

In addition to the above, the negotiation of the key of the confidential circuit can be performed by the same method. In addition to basic call functions such as identification of whether or not the wireless telephone is for non-telephone service and switching of voice level, negotiation for additional services is possible in this way. .

Further, in a multi-zone cordless telephone, when a pair of a wireless telephone and a fixed device is determined by location registration, a code for performing the same negotiation during the operation at the time of location registration may be transmitted and received.

〔The invention's effect〕

As described above, according to the present invention, the fixed device and the radiotelephone set each transmit the control information indicating its own function in addition to the connection control information necessary for connecting the two to each other. Since the wireless telephone and the fixed device receive the control information and execute the control operation for the function based on the control information, even if the fixed device and the wireless telephone have different functions or configurations, the wireless telephone or the partner device, It is possible to identify the function of the partner device from the control information of the fixed device, and thereby execute the function properly and economically. As a result, even if a plurality of wireless telephones or fixed devices having different service functions and functions are mixed in one cordless telephone system, the functions of each wireless telephone or fixed device can be properly implemented. Also, when adding a new function to an existing cordless telephone system,
It is easy to maintain compatibility between old and new devices even if existing wireless telephones without similar applied functions are mixed in the system.

[Brief description of drawings]

FIG. 1 and FIG. 2 are explanatory diagrams showing the flow of call originating and receiving operations of the cordless telephone according to the embodiment of the present invention, and FIGS. 3 and 4 are respectively diagrams of FIG. 1 and FIG. It is a circuit block diagram which shows the structure of the fixed device and wireless telephone for cordless telephones which implement operation. 11 …… Wireless telephone, 12 …… Fixed device, 24 …… Transceiver radio circuit, 25 …… Antenna, 27 …… Control CPU, 29 …… Telephone line, 31 …… Transceiver radio circuit, 35 …… Control CPU, 4
3 ... antenna

 ─────────────────────────────────────────────────── ─── Continuation of the front page Examiner Toshiyuki Ikeda (56) Reference JP-A-57-99043 (JP, A)

Claims (1)

[Claims] 1. A cordless telephone having a wireless telephone and a fixed device, which are connected to each other via a wireless line, when the wireless telephone and the fixed device have a function capable of being selectively activated. The device and the wireless telephone each have a control information transmitting means for transmitting the control information indicating its own function to the other party in addition to the connection control information necessary for this connection when connecting the wireless line between them. At the same time, the control information transmitted from the control information transmitting means of each other is received, and each device judges the selection of the selectively activating function based on the received control information, and starts the function. A cordless telephone characterized in that it has respective execution means for executing a control operation for the function determined to be so.