JPH08307933A - Radio telephone system - Google Patents

Abstract

PURPOSE: To provide a radio telephone system which does not become unabled communication state due to no detection of switching by a moving network being a switch source when the switch request of a cordless telephone set and a cellular telephone set is generated. CONSTITUTION: A control part 19 for transmitting the signal of effect that communication is unabled for switching a line to the mobile network of the switching source when the switch request of a communication function is generated at the radio telephone system in a waiting state and thereafter, transmitting switch request signal to the mobile network of the switching destination and a detection part 18 detecting the radio wave state of the cellular telephone set and that of the cordless telephone set are provided. The control part 19 displays a state after the switch request on a display part 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless telephone device, and more particularly to a wireless telephone device having a plurality of types of communication functions.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram showing a conventional example (Japanese Patent Application Laid-Open No. 5-153043) of this type of wireless telephone device. 1 is a display unit, 2 is an operation unit, 3 is a receiving unit, 4 is a transmitting unit, 5 is an antenna, 6 is a cordless wireless unit for performing wireless communication for cordless telephones, and 7 is cellular for performing wireless communication for cellular telephones. A wireless unit, 8 is a detection unit for continuously or periodically talking with a base unit of a cordless telephone or a base station to detect that the wireless communication range of the cordless telephone is within, and 9 supplies power to each unit. A control unit 10 that makes a display request to the display unit 1 according to the detection result of the detection unit 8 is a wireless telephone device including the above units.

Next, the operation of the conventional example shown in FIG. 2 will be described. When the control unit 9 receives the request for switching from the cellular phone to the cordless phone in the standby state of the cordless telephone, the control unit 9 causes the detection unit 8 to transmit the ID code request signal and sets the detection unit 8 to the ID code waiting state. To do.
Next, when the detection unit 8 receives the ID code within a predetermined time, it notifies the control unit 9 of a detection success signal, and the control unit 9 determines that the target radio wave of the cordless telephone is within the radio range. A judgment is made and a message to that effect is displayed on the display unit 1. On the other hand, if the detection unit 8 cannot receive the ID code within a predetermined time, it notifies the control unit 9 of a detection failure signal, and the control unit 9 determines that it is out of the radio wave coverage of the cordless telephone, and the display unit Display to that effect on 1.

[0004]

However, in this conventional radiotelephone device, when the user of the radiotelephone device switches between the cellular telephone and the cordless telephone, I
A location registration request signal such as a D code request signal is communicated to the switching destination mobile network, but not to the switching source mobile network.

Therefore, when the location information is managed in the mobile network of the switching source, even if the communication with the wireless telephone device is impossible, the management state of staying in the own mobile network is maintained. If an incoming call request to the wireless telephone device is generated in the mobile network of the switching source, the invalid load of the wireless resources increases because the wireless telephone device is called because it is in the service area. There's a problem.

In view of the above problems, the present invention provides a radiotelephone device in which a switching source mobile network does not detect switching when a request for switching between a cordless telephone and a cellular telephone is issued and communication is not lost. To aim.

[0007]

A wireless telephone device according to the present invention has a cellular communication function with a base station and a cordless communication function with a base unit of a mobile terminal, and switches between the cellular communication function and the cordless communication function. In the case of performing the above, it has a control means for performing switching after notifying the switching source that communication is disabled. Further, the control means, when a request for switching the communication function is issued to the wireless telephone device in a standby state, a control portion for transmitting a signal for switching to the switching source mobile network, a cellular telephone and a cordless telephone. It is preferably composed of a detection unit capable of detecting both radio waves of the telephone.

[0008]

When communication is performed using one communication function, when switching to the other communication function, the switching source network is notified to that effect, so that the switching source network uses the switched communication function. There is no waste of trying to establish a communication connection.

[0009]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a wireless telephone device of the present invention. The display unit 11, the operation unit 12, the earpiece unit 13, the transmitter unit 14, the antenna 15, the cordless radio unit 16, and the cellular radio unit 17 are the same as those in the related art, and 18 is a detection for detecting the radio states of the cordless radio and the cellular radio. The unit 19 supplies power to each of the above units and transmits a signal indicating that the switching request has been issued to the switching source mobile network when a switching request between the cellular telephone and the cordless telephone is generated, and then sends a switching request to the switching destination mobile network. A control unit that transmits a signal indicating that the event has occurred and requests switching, 20
Is a wireless telephone device body including the above-mentioned units.

Next, the operation of the radio telephone device configured as described above will be described. The operation unit 12 or the detection unit 1 which detects a decrease in the electric field strength of the cordless radio by the user of the wireless telephone device performing a predetermined operation.
8 requests the control unit 19 to switch from a cordless phone to a cellular phone in the wireless telephone device, the control unit 19 sends an out-of-range signal indicating that the communication by the cordless wireless communication is disabled due to the generation of the switching request. The wireless unit 16 is made to transmit. Next, the control unit 19 requests the detection unit 18 to detect the cellular radio, and the detection unit 18
When the cellular radio is detected and the detection notification is sent to the control unit 19, the control unit 19 requests the cellular radio unit 17 to send the location registration request signal.

In the above example, an example of switching from a cordless telephone to a cellular telephone has been described, but conversely, when switching from a cellular telephone to a cordless telephone, the contents of the operation procedure are almost the same. Is easy to understand.

[0012]

As described above, according to the present invention, when the wireless telephone device switches the communication function depending on the user's request or the reception state of the radio wave, the switching source mobile network is switched. It is possible to provide a wireless telephone device capable of making the notification. Therefore, by being able to notify the mobile network of the switching source, it is possible to suppress an invalid call from the mobile network when an incoming call is requested to the wireless telephone device, and it is possible to effectively utilize the wireless resources.

Further, when the call forwarding destination for no response is registered in advance in the mobile network, the incoming call request is forwarded to the forwarding destination registered in the call-disabled wireless telephone device without performing the incoming call. As a result, the continuous delay of the call is shortened. Furthermore, if a switch occurs, the wireless telephone device
Since communication is performed with the mobile networks of both the switching source and the switching destination, it is not necessary to communicate control information for location management between the mobile networks. Therefore, the existing communication network can be economically used for the wireless telephone device. It becomes possible to move to a mobile network.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a wireless telephone device of the present invention.

FIG. 2 is a block diagram showing a conventional example.

[Explanation of symbols]

 11 display unit 12 operation unit 13 receiver unit 14 transmitter unit 15 antenna 16 cordless wireless unit 17 cellular wireless unit 18 detection unit 19 control unit 20 wireless telephone device

Claims (3)

[Claims] 1. When a cellular communication function with a base station and a cordless communication function with a base unit of a mobile terminal are provided and switching between the cellular communication function and the cordless communication function is performed,
A wireless telephone device having a control means for performing switching after notifying the switching source that communication is disabled. 2. The control means, when a request for switching the communication function is issued to the wireless telephone device in a standby state, a control part for transmitting a signal for switching to the switching source mobile network, and a cellular phone. The radiotelephone device according to claim 1, comprising a detection unit capable of detecting radio waves of both the telephone and the cordless telephone. 3. The wireless telephone device according to claim 1, wherein the switching is performed by an instruction from an operation unit or a decrease in electric field strength of communication in use.