JP2003070065A - Compound portable telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve connection rate, in the case of call originating in a compound portable telephone set. SOLUTION: This compound portable telephone set has a radio apparatus (PDC) 11 and a radio apparatus (PHS) 12. A radio control part 25 decides, which electric field between the electric field of the PDC and the electric field of the PHS is more superior, when call originating operation is received, turns on a power source of the radio apparatus whose electric filed is superior, and conducts call origination.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite mobile terminal compatible with a plurality of independent mobile communication systems.

[0002]

2. Description of the Related Art An example of a composite mobile phone is disclosed in Japanese Patent Laid-Open No. 10-1.
74169. The system described here is used for car phones and PHS (Portable Handyphone Syste
With the m) and a multifunction device, the moving speed is detected and the communication method at the time of calling is selected.

[0003]

The above-mentioned conventional composite portable terminal does not take into consideration the switching of the communication method during stop, and one communication method is fixed and used during stop. Even if the PHS is a weak electric field and the mobile phone is a strong electric field, if the PHS is selected, the signal will be transmitted while the electric field is in a bad state, and the possibility of connection failure increases.

An object of the present invention is to provide a composite mobile phone with an improved connection rate when making a call.

[0005]

In order to achieve the above-mentioned object, a composite mobile phone of the present invention is provided with a plurality of radio control units for controlling radios corresponding to each mobile telephone system, and a transmission operation. A wireless control unit that determines which mobile telephone system has the best electric field, and a switching control unit that selects and activates the wireless control unit of the mobile telephone system that has the best electric field. .

By selecting the mobile telephone system having a good electric field, it is possible to suppress the connection failure at the time of making a call and the connection rate is improved.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

Referring to FIG. 1, the composite mobile phone according to the first embodiment of the present invention is a hardware device including a radio (PD).
C) 11 and radio (PHS (Personal Digital Cellular))
12 and an LCD (Liquid Crystal Display) 13, and as a software, a wireless controller (PDC) 21, a wireless controller (PHS) 22, a PDC / PHS switching controller 24, and a wireless controller 2.
5, an LCD control unit 23 and an operation system control unit 26.

The radio control units 21 and 22 are radio devices 1 respectively.
Controls 1 and 12 (power on / off, etc.) are performed. The LCD control unit 23 controls the LCD 13 (power ON / OFF, display, etc.). The PDC / PHS switching control unit 24 is the wireless control unit 21.
Alternatively, the control is switched to 22. The radio controller 25 controls the base station. The operation system control unit 26 controls a calling operation of the mobile phone.

When the user makes a transmission operation, the operation control unit 26 notifies the wireless control unit 25 of that fact, and the wireless control unit 25 compares the electric field states of the wireless devices 11 and 12,
The PDC / PHS switching control unit 24 selects the wireless control unit 21 or 22.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG.

First, in step 31, a call origination operation of the mobile phone is performed. Next, in step 32, it is determined whether or not the call is ready. The "callable state" is a state in which "out of service" is not displayed. It receives the channel signal of the base station, judges whether the base station is a business operator with which it has a contract, and if so, can transmit. If the call cannot be made, the call is stopped in step 33. If the call can be made, the PD is entered in step 34.
It is determined whether both C (radio device 11) and PHS (radio device 12) can make a call. If only one of them can make a call, in step 35, it is determined whether the PDC can make a call. If the PDC can make a call, the wireless controller 21 controls the wireless device 11 in step 36 to perform the PDC call process. If it is possible to make a call by PHS, the wireless controller 22 controls the wireless device 12 in step 37 to perform a call process at the PHS. Which of the PHS has a stronger electric field is judged by the antenna display of the mobile phone. If the PDC has a stronger electric field, the transmitting process by the PDC is performed in step 39. If PHS is a stronger electric field, in step 40, PHS transmission processing is performed.

Referring to FIG. 3, the composite mobile phone according to the second embodiment of the present invention includes a radio device 41 as hardware.
(System A), wireless device 42 (system B), wireless device 43 (system C), and LCD 44 are included, and wireless device control units 51, 52, 53, LCD control unit 54, and A /
B / C switching control unit 55, wireless control unit 56, and operation system control unit 5
Including 7. System A, System B, and System C are actually PDC, PHS, GSM (Global System for Mobile Communic
ation).

The radio control units 51, 52 and 53 control the radios 41, 42 and 43 (ON / OFF control of power supply, etc.), respectively. The LCD control unit 54 controls the LCD 44. A
The / B / C control unit 55 switches control to any of the wireless control units 51, 52, and 53. The wireless control unit 56 controls the base station. The operation system control unit 57 controls the calling operation of the mobile phone.

When making a call, the operation control unit 57 notifies the wireless control unit 56 of the calling operation, and the wireless control unit 56 notifies the A / B / C switching control unit 55 of the system having the best electric field. , Select the corresponding wireless control unit.

Next, the operation of the mobile phone of this embodiment will be described.

First, a calling process is performed in step 61, and it is determined in step 62 whether the calling is possible. If the call cannot be made, the call is stopped in step 63. If the transmission is possible, the state of the electric field is determined in step 64, that is, it is determined whether the system A has the best state of the electric field. If the system A has the best electric field, the wireless controller 41 activates the wireless device 41 in step 65. If the system A is not the system with the best electric field, it is determined in step 66 whether the system B is the system with the best electric field. If the system B has the best electric field, the wireless controller 52 controls the wireless device 42 in step 67. Otherwise, step 6
In step 8, the wireless controller 41 controls the wireless device 41.

The determination as to whether transmission is possible or the electric field state is performed in the same manner as in the first embodiment.

The combination of mobile telephone systems is not limited to the above embodiment. Communication methods and PDC that are expected to be developed in the future
And the like are also included in the present invention.

[0020]

As described above, according to the present invention, by selecting the mobile telephone system having the best electric field, the connection failure at the time of making a call can be suppressed and the connection rate is improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a composite mobile phone according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of the composite mobile phone of FIG.

FIG. 3 is a configuration diagram of a composite mobile phone according to a second embodiment of the present invention.

FIG. 4 is a flowchart showing an operation of the composite mobile phone of FIG.

[Explanation of symbols]

11, 12, 41, 42, 43 radio 21, 22, 51, 42, 53 Wireless control unit 13, 14 LCD 23, 54 LCD control unit 24 PDC / PHS switching control 55 A / B / C switching controller 25, 56 Wireless control unit 26, 57 Operation system control unit 31-40, 61-68 steps

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 5K027 AA11 KK03                 5K067 AA25 BB03 BB04 CC04 EE02                       EE10 FF16 FF23 HH22 JJ13

Claims (3)

[Claims] 1. Among a plurality of independent mobile telephone systems,
In a composite mobile phone capable of receiving a call by the selected one mobile telephone system, a plurality of radio control units for controlling radios corresponding to each mobile telephone system and one of It has a wireless control unit that determines whether the mobile phone system has the best electric field, and a switching control unit that selects and activates the mobile phone system wireless control unit that has the best electric field. Combined mobile phone. 2. The mobile telephone system is PDC and PHS,
The composite mobile phone according to claim 1. 3. The composite mobile phone according to claim 1, wherein the mobile phone system is PDC, PHS, or GSM.