JP2002084574A - Portable telephone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable reduction in development expenses and shortening of a developing period, when changing a model and to enable a reuse of a part of an old model, even in the case of changing the model. SOLUTION: A portable telephone comprises a transmitter/receiver 1, a communication protocol processor 2 for handling a communication with a base station which is under the control of the transmitter-receiver 1, an interface controller 5 for controlling a user interface 6, and CPUs 3 and 4 for controlling the processor 2 and the controller 4. In this case, the processor 2 is subjected to circuit integration independently of the controller 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone, and more particularly to a block structure of the portable telephone.

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional general mobile phone is roughly divided into a transmitting / receiving unit 21, a baseband processing IC (integrated circuit) 22, a CPU 23, a user interface 24, and the like. It is in charge of overall control.

[0003] A transmitting / receiving unit 21 transmits and receives signals to and from a base station, and performs modulation for transmission and demodulation of a received signal. The baseband processing IC 22 has a communication protocol processing unit 22a and an interface control unit 22b. The communication protocol processing unit 22a is an OS (basic software) for executing communication based on a command from the CPU 23.
The transmission / reception unit 21a is controlled according to the following.

The interface controller 22b comprises a display controller 22b1, a key controller 22b2,
A vocoder 22b3, a USB 22b4, etc.
3 to control the corresponding one of the user interface 24. User interface 2
4 is a display 24a, a key switch 24b,
Microphone 24c, speaker 24d, USB connector 24e
Etc. An external PC 2 is connected to the USB connector 24e.
5 is connected.

[0005] In the above configuration, the communication protocol processing section 22a and the interface control section 22b are configured as one baseband processing IC 22, thereby reducing the overall size. And the transmitting / receiving unit 2
1. Baseband processing IC 22, user interface 24 (display 24a, key switch 24)
b, microphone 24c, speaker 24d, USB connector 2
4e) is mounted on a single printed circuit board (a so-called mother board, not shown) and housed in a telephone case.

[0006]

Recently, portable telephones have been regularly changed in model for miniaturization and high performance. for that reason,
Each time, it is necessary to newly develop a baseband processing IC and software corresponding thereto, which requires enormous cost and time for development.

[0007] When the model is changed, the old model is discarded, and the waste of resources and the influence on the environment have become problems.

Accordingly, the present invention is to reduce the development cost and the development period when a model change is made, and to make it possible to reuse a part of the old model even when the model is changed. Aim.

[0009]

Means for Solving the Problems To solve the above problems,
In the mobile phone of the present invention, a transmission / reception unit, a communication protocol processing unit that controls the transmission / reception unit and controls communication with a base station, an interface control unit that controls a user interface, the communication protocol processing unit, and the interface And a CPU for controlling the control unit, wherein the communication protocol processing unit is integrated into an integrated circuit independently of the interface control unit.

Further, the CPU is divided into two parts, a first CPU for controlling the communication protocol processing part and a second CPU for controlling the interface control part. , The first C
A control signal is exchanged between the PU and the second CPU.

A first printed circuit board and a second printed circuit board, wherein the transmitting / receiving unit, the communication protocol processing unit, and the first CPU are mounted on the first printed circuit board; Control unit and the second CP
U was mounted on the second printed circuit board.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, FIG. 1 shows a configuration of a portable telephone according to the present invention. A transmitting / receiving unit 1 has a transmitting unit and a receiving unit, is controlled by a communication protocol processing unit 2, and communicates with a base station. It performs signal transmission and reception, and performs modulation for transmission and demodulation of a received signal. The communication protocol processing unit 2 is formed as an integrated circuit, and controls the transmission / reception unit 1 according to an OS (basic software) for executing a communication protocol based on a command from the first CPU 3. The first CPU 3 is also integrated.

A protocol for communicating with a base station is defined in a portable telephone system, and an OS has been developed in accordance with this specification. The first CPU 3 is a dedicated CPU for controlling the communication protocol, and performs a series of operations by the OS for executing the communication protocol together with the communication protocol processing unit 2.

Further, a second CPU 4 for transmitting and receiving signals to and from the first CPU 3 is provided. The second CPU is for controlling the interface control unit 5, and if the content of the user interface 6 is changed, the configuration of the second CPU 4 itself and a program (software) for operating the same are also changed.

The interface controller 5 includes a display controller 5a, a key controller 5b, a vocoder 5c, and a US
B5d, etc., each having a user interface 6
, A key switch 6b, a microphone 6c and a speaker 6d, and a USB connector 6e. US
An external personal computer 7 may be connected to the B connector 6e. The second CPU 4 and the interface control unit 5 are each integrated.

When the above components are incorporated into the case 10 of the mobile phone, the transmitting / receiving unit 1, the communication protocol processing unit 2, and the first CPU 3 are mounted on the first printed circuit board 11, The other second CPU 4, interface controller 5, and user interface 6 are mounted on the second printed circuit board 12. Then, the first printed board 11 and the second printed board 12 are connected by the connector 13, and both are housed in the case 11.

Since the communication protocol of the portable telephone constructed as described above hardly changes even if the model is changed, mainly the second CPU 4 and the interface control unit 5 mounted on the second printed circuit board 12 are used. Only the user interface 6 and software for the user interface 6 need to be newly developed, and the development period and development cost can be reduced.

A transmitting / receiving unit 1, a communication protocol processing unit 2, and a first CPU mounted on a first printed circuit board 11
No. 3 can be reused for a new model, so there is no need to dispose of it, and it is possible to reduce environmental problems and to suppress a rise in price due to new development.

[0019]

As described above, the portable telephone according to the present invention has the following features.
A transmission / reception unit, a communication protocol processing unit that controls the transmission / reception unit and controls communication with the base station, an interface control unit that controls a user interface, and a CPU that controls the communication protocol processing unit and the interface control unit, Since the communication protocol processing unit is integrated into an integrated circuit independent of the interface control unit, even if the model is changed, the communication protocol remains unchanged, so only the interface control unit, user interface and software for it are newly developed. The development time can be shortened and the development cost can be reduced. Further, the transmission / reception unit and the communication protocol control unit can be used for the new model as they are.

Further, the CPU is divided into two parts, a first CPU for controlling a communication protocol processing unit and a second CPU for controlling an interface control unit, and each is integrated into an integrated circuit. CPU and second CP
Since the control signal has been exchanged with U, the first CPU remains unchanged when the model is changed.
You only need to develop PU and the corresponding software.
The development period and development cost can be reduced. Further, the first CPU can be adopted as it is for a new model.

Further, the apparatus has a first printed circuit board and a second printed circuit board, a transmitting / receiving section, a communication protocol processing section, and a first CPU are mounted on the first printed circuit board. CPU is mounted on the second printed circuit board, so if there is a model change, the transmission / reception unit, communication protocol processing unit, and first CPU mounted on the first printed circuit board are discarded. It can be reused for new models without any change, which helps to reduce costs and prevent environmental destruction.

[Brief description of the drawings]

FIG. 1 is a block diagram of a mobile phone according to the present invention.

FIG. 2 is a sectional view of a main part of the mobile phone of the present invention.

FIG. 3 is a block diagram of a conventional mobile phone.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 transmitting / receiving part 2 communication protocol control part 3 1st CPU 4 2nd CPU 5 interface control part 5a display controller 5b key controller 5c vocoder 5d USB 6 user interface 6a display 6b key switch 6c microphone 6d speaker 6e USB connector 7 personal computer 10 Case 11 First printed circuit board 12 Second printed circuit board 13 Connector

Claims (3)

[Claims] A transmission / reception unit, a communication protocol processing unit for controlling the transmission / reception unit and controlling communication with a base station, an interface control unit for controlling a user interface, the communication protocol processing unit and the interface control unit. And a CPU for controlling the communication protocol processing unit, wherein the communication protocol processing unit is integrated into a circuit independent of the interface control unit. 2. The CPU is divided into two parts, a first CPU for controlling the communication protocol processing part and a second CPU for controlling the interface control part. , The first CPU
The mobile phone according to claim 1, wherein a control signal is transmitted and received between the mobile phone and the second CPU. A first printed circuit board and a second printed circuit board, wherein the transmitting / receiving unit, the communication protocol processing unit, and the first CPU are mounted on the first printed circuit board; The mobile phone according to claim 2, wherein a control unit and the second CPU are mounted on the second printed circuit board.