JP3293810B2 - Communication method for composite mobile terminal and communication system therefor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication method of a composite mobile terminal and a communication system thereof, and more particularly, to a communication method of a composite mobile terminal in which a mobile phone and a PHS terminal that move at high speed are combined and a communication system thereof.

[0002]

2. Description of the Related Art With the spread of mobile terminals such as mobile phones and PHSs, communication network environments are being prepared for each. However, the use of PHSs during high-speed movement is not possible. Each has its own problems, such as the fact that it cannot be used in such places (underground shopping malls). In consideration of such circumstances, multifunction peripherals that can be connected to both a mobile telephone communication network and a PHS communication network have been marketed. Such a multifunction device can be connected to each communication network by making a call in each communication mode, but is not designed to freely switch the communication mode during a call by sharing both communication networks.

By providing two earphones, a connection cord, a switch, and two pairs of antennas in a mobile phone main body, a device that can place the mobile phone main body at an arbitrary position when using a head unit is disclosed. JP 04-200
No. 047: It is known as seen in a portable telephone device, but there is no known composite portable device capable of widening the range of continuous communication using two communication networks.

[0004] It is desired to provide a portable telephone / PHS combined terminal device capable of sharing and using two communication networks (PHS communication network and portable telephone communication network) during a call.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a communication method for a composite mobile terminal which can share and use a plurality of communication networks during a call, and a communication system therefor.

[0006]

Means for solving the problem are described as follows. The technical items appearing in the expression are appended with numbers, symbols, and the like in parentheses (). The numbers, symbols, and the like are technical items that constitute at least one embodiment or a plurality of the embodiments of the present invention, in particular, the embodiments or the examples. Corresponds to the reference numerals, reference symbols, and the like assigned to the technical matters expressed in the drawings corresponding to the above. Such reference numbers and reference symbols clarify the correspondence and bridging between the technical matters described in the claims and the technical matters of the embodiments or examples. Such correspondence / bridge does not mean that the technical matters described in the claims are interpreted as being limited to the technical matters of the embodiments or the examples.

A communication method of a composite mobile terminal and a communication system according to the present invention are provided for communicating between a mobile terminal (10) and another terminal by a first wireless communication network (15). Detecting that the condition of the received radio wave has deteriorated, and in response to the detection, changing the communication between the mobile terminal (10) and another terminal from the communication by the first communication network (15) to the second wireless communication Switching to communication by the network (17). The wireless communication network changes its communication conditions due to its communication status and communication environment. The user can benefit from selecting an advantageous communication network in response to such a change in status.

[0008] The communication method of the composite mobile terminal according to the present invention comprises:
Further, in response to the detection, the mobile terminal (10) passes through the second base station (16) on the side of the second communication network (17) and then to the second base station on the side of the second wireless communication network (17). Bureau (16)
Via the communication network switching signal to the mobile terminal (10), and the switching is performed based on the communication network switching signal. The communication network can be selected by effectively utilizing the equipment of the wide area communication network. Such switching is performed by the second base station (16). Further, it is preferable to notify the other terminals of the switching at the time of switching. Advantageously, the switching is performed by the mobile terminal (10). Further, the switching can be performed by a user of the mobile terminal.

In response to the detection, the mobile terminal (10) passes through the second base station (16) on the side of the second wireless communication network (17) and then to the second terminal on the side of the second wireless communication network (16). A communication network switching signal is transmitted to the mobile terminal (1) via one base station (14).
0), executing the switching based on the communication network switching signal, and notifying the switching to another terminal at the time of the switching, and the switching is performed by the mobile terminal (10). Can be performed. When the state of the radio wave is improved, it is preferable to return the communication network to the first wireless communication network before the switching. The first communication network (15) is lower in cost than the second wireless communication network (17).

A communication system for a composite mobile terminal according to the present invention comprises a mobile terminal (10), another terminal, and a mobile terminal (1).
0) and a first wireless communication network (1) communicating with another terminal.
5) and a second wireless communication network (17) for performing communication between the mobile terminal (10) and another terminal.
0) is a detecting unit (4) for detecting that the state of the received radio wave received from the first wireless communication network (15) has changed, and based on the detection, a connection between the mobile terminal (10) and another terminal is detected. From the first wireless communication network (15) to the second wireless communication network (1).
And a control unit (13) for executing control for switching to 7).

Further, the first wireless communication network (15) has a first wireless communication network (15).
A base station (14) and a second wireless communication network (17).
The control unit (13) is transmitted from the mobile terminal (10), and the switching signal is transmitted to the second wireless communication network (17), the second base station (16), and the first base station. The control is executed based on the switching signal received by the mobile terminal (10) via (14) and the second wireless communication network (15). By such a circulation of the switching signal, reliable switching can be performed.

The second wireless communication network (17) is a communication network for a high-speed mobile terminal, and the first wireless communication network (15) is a PHS.
In the case of a communication network for a terminal, the device of the present invention finds an advantage in communication utilizing a current existing communication network.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In accordance with the drawings, an embodiment of a communication system for a composite mobile terminal according to the present invention is provided with two networks, a mobile telephone network and a PHS network.
As shown in FIG. 1, a radio unit 1 for mobile phone which transmits and receives radio waves of the mobile phone network is provided together with a radio unit 2 for PHS which transmits and receives radio waves of the PHS network. The mobile phone compatible radio unit 1 is connected to a mobile phone low electric field detection unit 3 that detects that the electric field of the radio wave received by the mobile phone is not sufficient for a call. The PHS-compatible radio unit 2 is connected to a PHS low electric field detection unit 4 that detects that the electric field of the radio wave received by the PHS is not sufficient for a call.

The mobile phone compatible radio unit 1 and the PHS compatible radio unit 2 are bidirectionally connected to the data converter 5, respectively. The data conversion unit 5 converts the data received by the wireless unit for mobile phone 1 and the wireless unit for PHS 2 into audio data, outputs the audio data from the speaker unit 6, and converts the audio data received from the microphone 7 into the wireless communication for mobile phone. The signal is converted into a signal to be transmitted from the unit 1 and the PHS-compatible wireless unit 2 to each other. The memory unit 8 is bidirectionally connected to the data conversion unit 5. The memory unit 8 stores the telephone numbers of the incoming and outgoing calls and the telephone numbers of the respective communication networks of the own terminal. The display unit 9 displays a call mode, a mode switching operation, and the like. The operation unit 11
Thus, the telephone number can be input. Power supply unit 1
2 supplies power to each unit. The control unit 13 controls the units 1, 2, 3, 4, 5, 8, and 9 accordingly. The control unit 13 is bidirectionally connected to the memory unit 8.

FIG. 2 shows two line (communication) networks including the above-described portable telephone / PHS combined terminal (combined terminal) 10. The composite terminal 10 performs bidirectional wireless communication with the PHS base station 14 via the PHS communication network 15. Composite terminal 1
0 is the mobile phone base station 16 via the mobile phone communication network 17
And two-way wireless communication. The public telephone network 18 is bidirectionally connected to the mobile phone base station 16. A general public telephone terminal (general telephone) 19 is bidirectionally connected to the public telephone network 18 by wire. The PHS base station 14 has a public telephone network 18.
Connected in both directions.

FIG. 3 shows an embodiment of a mode switching method according to the present invention. The composite terminal 10 communicates with the general telephone 19 and the PH via the PHS base station 14 and the public telephone network 18.
Talking in S mode. In step A, it is determined whether a call is in progress in the PHS mode. In step B,
It is determined whether the PHS electric field is sufficient for a call. Even if the PHS electric field is not a sufficient electric field for the call, the call is continued in the PHS mode (step C).

During the call, if the electric field received by the PHS-compatible radio unit 2 becomes lower than a certain value (an electric field value of a low level that hinders the call: hereinafter referred to as a low electric field),
In step D, the PHS low electric field detection unit 4 monitoring the electric field value of the PHS correspondence radio unit 2 detects that the electric field has become low.

In step E, the control unit 13 controls the mobile phone compatible radio unit 1 so that the mobile phone compatible wireless unit 1 operates.
To instruct. In step F, the control unit 13 determines whether synchronization can be established between the mobile phone corresponding radio unit 1 and the mobile phone base station 16. If the synchronization cannot be established, a message indicating that mode switching is not possible is displayed on the display unit 9 (step G), the PHS mode is continued, and the process proceeds to step B.

If the synchronization can be established, the synchronization is established by the control unit 13. In step H, the control unit 13 sends the synchronization to the mobile phone communication network 1 through the mobile phone compatible radio unit 1.
From 7, a call is made to the other party of the PHS mode telephone number of the composite terminal 10, which is the user, using the mobile telephone number. The call signal is received by the mobile phone base station 16 and the public telephone network 18
Is input to the PHS base station 14 through.

The PHS base station 14 that has received the call signal
Communicates in step I that the mode can be switched to the composite terminal 10 through the PHS-compatible radio unit 2.
To the control unit 13. The control unit 13 of the composite terminal 10 notified as described above, as shown in FIG.
The switching of the call mode is displayed on the display unit 9 with "mode switching in progress", and the PH is transmitted through the PHS-compatible wireless unit 2.
Instruct the S base station 14 to switch the communication network (step J).

In step K, the PHS base station 14 switches the subsequent communication network to the communication network 17 via the mobile phone base station 16. During the switching work, the PHS base station 14 sends a message indicating that the switching is being performed to the general telephone 19 that is the communication partner. When the PHS base station 14 is switching the communication network, the control unit 13 of the composite terminal 10
In step L, the operation of the PHS-compatible radio unit 2 is stopped, the data conversion unit 5 is instructed to make a call through the mobile phone-compatible radio unit 1, and the mode is changed to the mobile phone mode in the multi-function terminal 10. Switch. When the switching mode is switched, the composite terminal 10 transmits a call from the cellular phone compatible radio unit 1 in step M to instruct the PHS base station 14 that the mode has been switched through the cellular phone network 17.

Next, the composite terminal 10 displays "mode switching completed" on the display 9 and one second after that, "in portable mode talking" is displayed on the display 9. Finally, the designated PHS base station 14 connects the line to the general telephone 19 of the call partner, and the call is possible with the call partner. In addition, as shown in FIG. 4 (b), even if an attempt is made to switch the call mode, the mode cannot be switched when the received electric field value is low in the mode to be switched (here, the mobile phone mode). Displayed on the display unit 9,
The call is made without changing the mode. In the description in the case of switching during the call from the mobile phone mode to the PHS mode, the operation of the mobile phone and the operation of the PHS are switched, and the corresponding terms in those descriptions are replaced with each other.

FIG. 5 shows another embodiment according to the present invention. As another embodiment, an example in which the operation unit 11 is changed to an operation unit 21 with a mode changeover switch will be described.
The mode switching switch selects the mode switching by itself when the owner of the composite terminal 10 is notified that the mode can be switched. The owner of the composite terminal 10 changes the call mode by himself using the mode changeover switch, so that the owner of the composite terminal 10 can immediately notify the other party that the mode is to be switched to the other party, and smoothly communicate with the other party. It has the effect of having a good conversation. Further, in this configuration, if the "mode switching switch" is positioned as a "mode switching start key", the mode switching operation can be performed at the will of the owner. As a result, the owner of the composite terminal 10 can switch the call mode according to the purpose even during the call.

FIG. 6 shows still another embodiment according to the present invention. In this embodiment, the mobile phone low electric field detection unit 3 and the PHS low electric field detection unit 4 are changed to a mobile telephone electric field detection unit 22 and a PHS electric field detection unit 25, respectively. The detecting unit 22 (25) controls the radio unit 1 (2) of the previous mode even after the mode has been switched once, and if the electric field value is sufficient for a call, the control unit determines the detection result. 13 and the control unit 13 further switches the call mode based on the call mode. In this way, if there is a difference in call quality or usage fee between each communication network, use the communication network that suits your purpose more than if you first talk on a communication network that has an advantage for the user. (For example, a communication network with a low telephone charge can be used). The effect here becomes clearer if the mobile telephone communication network is a high-power wireless communication network with a small amount of data and the PHS communication network is a low-power wireless communication network with a large amount of data.

FIG. 7 shows still another embodiment according to the present invention. In this embodiment, a mobile phone communication quality determination unit 24 and a PHS communication quality determination unit 25 are used instead of the mobile phone electric field detection unit 22 and the PHS electric field detection unit 23. Accordingly, when the communication quality is deteriorated by a certain degree or more instead of the electric field, it is determined that the communication is switched to the control unit.

As still another embodiment, the communication can be switched by combining the communication quality judging unit and the low electric field detecting unit and the communication quality judging unit and the electric field detecting unit. Here, depending on the setting, switching the communication network by giving priority to the communication quality determination unit, switching the communication network by giving priority to the electric field detection unit, and when either the communication quality determination unit or the electric field detection unit determines or instructs detection. The communication network can be switched.

In the above-described embodiment, the detection result is determined by the electric field detection unit and the communication quality determination unit, and the control unit is instructed to switch the communication. However, each electric field detection unit and each communication determination unit detect the detection result. The result may be output, and the control unit to which the result is input may make a determination and switch communication. Here, since the memory unit is connected to the control unit, data exchange can be simplified with such a configuration.

[0028]

According to the present invention, the communication method of the composite mobile terminal and the communication system thereof are described as "moving at high speed from a stationary state" where the telephone call has been disconnected by the mode switching during the telephone call of the portable telephone PHS composite terminal device. Time or "move to the underground mall"
In some cases, a call can be made without disconnecting the call, and a wider service area can be secured while continuing the call.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram showing an embodiment of a communication system for a complex mobile terminal according to the present invention.

FIG. 2 is a system block diagram showing an embodiment of a communication system for a composite mobile terminal according to the present invention.

FIG. 3 is a flowchart illustrating an embodiment of a communication method of a composite mobile terminal according to the present invention.

FIG. 4 is a flowchart showing a display mode.

FIG. 5 is a circuit block diagram showing another embodiment of the communication system of the composite mobile terminal according to the present invention.

FIG. 6 is a circuit block diagram showing still another embodiment of the communication system of the composite mobile terminal according to the present invention.

FIG. 7 is a circuit block diagram showing still another embodiment of the communication system of the composite mobile terminal according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 4 ... Detection part 10 ... Mobile terminal (composite terminal) 13 ... Control part 14 ... 1st base station 15 ... 1st radio communication network 16 ... 2nd base station 17 ... 2nd radio communication network

Claims (9)

(57) [Claims] 1. A communication between a mobile terminal and another terminal by a first wireless communication network, detecting that a condition of a radio wave received by the mobile terminal has deteriorated, and moving in response to the detection. Switching communication between a terminal and the other terminal from communication using the first communication network to communication using a second wireless communication network; and, in response to the detection, from the mobile terminal on the side of the second communication network. Via the second base station and then on the side of the first wireless communication network
A communication method for a composite mobile terminal, comprising: transmitting a communication network switching signal to the mobile terminal via a first base station; and performing the switching based on the communication network switching signal. 2. The communication method according to claim 1, wherein the switching is performed by the first base station. 3. The communication method of a composite mobile terminal according to claim 2, further comprising, when said switching, notifying said another terminal of said switching, said switching being performed by said mobile terminal. 4. The communication method according to claim 3, wherein the switching is performed by a user of the mobile terminal. 5. The method according to claim 1,Furthermore, Said The switching is performed based on a communication network switching signal.
Notifying the other terminal of the switching at the time of the switching.
Wherein the switching is performed by a complex mobile performed by the mobile terminal.
Terminal communication method. 6. The communication method according to claim 1, further comprising returning a communication network to said first wireless communication network before said switching when said radio wave condition is improved. 7. The communication method according to claim 6, wherein the first communication network is lower than the second wireless communication network in terms of a fee. 8. A mobile terminal, another terminal, a first wireless communication network for communicating between the mobile terminal and the other terminal, and communication between the mobile terminal and the other terminal. The mobile terminal comprises: a detecting unit configured to detect a change in a state of a received radio wave received from the first wireless communication network; and the mobile terminal and the other based on the detection. A control unit that executes control for switching a communication network with the terminal from the first wireless communication network to the second wireless communication network; a first base station on the first wireless communication network side; consists of a second base station side of the wireless communication network, wherein, the originating from the mobile terminal, via the second base station and the second wireless communication network, then the second
A communication system for a composite mobile terminal that executes the control based on a switching signal received by the mobile terminal via one base station and the first wireless communication network. 9. The communication system according to claim 8, wherein the second wireless communication network is a communication network for a high-speed mobile terminal, and the first wireless communication network is a communication network for a PHS terminal. .