JPH09284839A - Portable telephone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable telephone system in which the software is easily updated at a low cost. SOLUTION: A portable telephone set 3 stores a control soft ware to an EEPROM, a master set 2 sends the control software for replacement via a telephone line, the portable telephone set 3 receives it and returns it to the master set 2 and the master set 2 discriminates whether the software is matched with sent data. When they are matched with each other, the signal denoting the matching is sent, and when the transmission is finished, a telephone line is interrupted and the portable telephone set 3 updates the control software in the EEPROM with the received control software.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile phone system, and more particularly to a mobile phone system capable of easily and inexpensively updating control software of a mobile phone.

[0002]

2. Description of the Related Art Recently, mobile phones having various functions are increasing, but most of the functions are realized by software processing by a CPU.

A conventional mobile phone system will be described, particularly focusing on a method of updating control software of the mobile phone. A conventional mobile phone has a ROM that stores control software and a CPU that reads out and executes the control software from the ROM.

Here, the ROM is a mask ROM or EP.
It is a ROM, and when replacing software,
In the mask ROM, the control software is updated by replacing it with a ROM storing new control software.

In some cases, the mask ROM is directly attached to the substrate. In this case, the control software is to be updated by replacing the entire substrate.

In the EPROM, the mobile phone is disassembled once, the ROM is taken out, the control software is newly stored, and the control software is reattached to the mobile phone.
I was trying to update the control software.

[0007]

Therefore, in the above-mentioned conventional portable telephone, it is necessary to collect the portable telephone from the user once in order to update the control software, and the procedure for updating the control software is complicated, There is a problem in that the work takes time and the cost cannot be reduced.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a mobile phone capable of easily and inexpensively updating control software.

[0009]

The invention according to claim 1 for solving the above-mentioned problems of the prior art, is a portable telephone system, wherein when the control software of the portable telephone is updated, the software is stored. Characterized by transmitting and receiving wirelessly, the mobile phone updates the software,
It is not necessary to collect the mobile phone, the procedure for updating the control software can be simplified, and the time and cost required therefor can be reduced.

According to a second aspect of the present invention for solving the above-mentioned problems of the conventional example, in a mobile phone system, a mobile phone including at least a base unit and a mobile phone for storing control software in a storage unit. In the system, the master unit divides the control software for updating the mobile phone into blocks, adds an error correction code and transmits the coded block, and the mobile phone receives the coded block. Error correction is performed to decode the block, and the block is reproduced and returned to the master unit. The master unit compares the transmitted block and the returned block, and if they do not match, the block is concerned. To the mobile phone again, and if they match, a signal indicating that the data has been normally transmitted and the next coding block are transmitted to the mobile phone, and the mobile phone Receives a signal indicating that it has been normally transmitted, and holds the corresponding block, said master unit,
When the transmission of the entire control software is completed, the mobile phone updates the control software stored in the storage unit with the control software composed of the held blocks, and the mobile phone is collected. There is no need, the procedure for updating the control software can be simplified, and the time and cost required therefor can be reduced.

[0011]

Embodiments of the present invention will be described with reference to the drawings. In the mobile phone system according to the present invention (this system), the base station transmits the control software to be updated by using the normal telephone line, the mobile phone receives the control software, and the control software is replaced. The software update work can be performed easily and inexpensively.

This system will be described with reference to FIG. FIG.
FIG. 1 is an explanatory diagram showing an outline of a mobile phone system according to the present invention. This system, as shown in FIG.
And a base unit 2 and a mobile phone 3.

Explaining each part, the onshore equipment 1 is an ISD.
It is the same as a normal telephone line having an exchange such as N and PSTN. The base unit 2 is a base station, which is wirelessly connected to the mobile phone 3 and wired to the land facility 1, and relays a full-duplex line between them. Further, the master device 2 transmits the control software to be updated to the mobile phone 3.

The mobile phone 3 has a specific number (telephone number).
Is added, and wireless communication is performed with the base unit 2 to transmit and receive voice and the like to and from another telephone or the other mobile telephone 3 via the land facility 1.

Next, the operation of exchanging the control software between the base unit 2 and the mobile phone 3 will be described more specifically with reference to FIG. FIG. 2 is a flow chart showing the replacement operation of the control software by the base unit 2 and the CPU 33 of the mobile phone 3.

First, the base unit 2 sends a function changing special code to call the mobile telephone 3 to connect the telephone line and notify the mobile telephone 3 that the control software is to be transmitted. (S1). And the mobile phone 3
When the function changing special code is received, the confirmation function changing code is transmitted to the parent device 2 (S2).

Here, if the mobile phone 3 seems to be in an area where the radio wave from the base unit 2 cannot be effectively received, the control software cannot be transmitted. Therefore, when the master device 2 detects that the confirmation function change code is not received within a certain period of time, the replacement operation of the control software is stopped.

Base unit 2 which has received the confirmation function change code
Divides the control software to be updated into blocks of a certain size and assigns a serial number (address) to each block.
And an error correction code are added and transmitted as an encoded block in the order of addresses. That is, the master device 2 first transmits the block to which the first address is assigned (S
3).

Mobile phone 3 which has received the encoded block
Performs error correction, decodes and reproduces the block.
Then, the mobile phone 3 sends the decrypted block to the master device 2
(S4). The main | base station 2 receives the block decrypted by the mobile telephone 3, and checks whether it matches with the block which self transmitted in process S3.

If the blocks do not match,
The main | base station 2 returns to process S3 and retransmits the said block. If the blocks match, the master device 2 transmits the address of the block inspected for the match as a signal indicating the approval (S5).

Then, the base unit 2 transmits the block of the next address (S6). After that, when steps S3 to S6 are repeated and transmission of all blocks is completed, the master device 2 disconnects the telephone line.

Next, the inside of the mobile phone 3 is shown in FIG.
This will be specifically described with reference to FIG. FIG. 3 is a configuration block diagram of the mobile phone. As shown in FIG. 3, the mobile phone 3 includes a ROM 31, an EEPROM 32, and a CPU 33.
And a transmitter / receiver 34. Here, the storage unit described in claim 2 corresponds to the EEPROM 32. Although not shown, the mobile phone 3 has circuits necessary for a normal phone, such as a voice decoding circuit.

The respective parts of the mobile phone 3 will be specifically described below. The ROM 31 stores basic software, which is not planned to be replaced in the future, and software for replacing control software (hereinafter referred to as replacement software).

The EEPROM 32 uses an electric signal to
It is a PROM that erases and rewrites its contents, and stores control software to be replaced and parameters used by the control software. In order to simplify the following description, this parameter is also included when simply referred to as control software.

The CPU 33 has a ROM 31 and an EEPROM.
32, the basic software, the replacement software and the control software stored in 32 are read out and executed. Further, the CPU 33 replaces the control software stored in the EEPROM 32 according to the replacement software.

The transmitting / receiving section 34 determines whether the received signal is a special code for changing the function, and if not, operates as a normal telephone. If the received signal is the special code for changing the function, a signal indicating that the special code for changing the function has been received is output to the CPU 33, and the update control software received from the master unit 2 thereafter is CPU33 and CPU3
The signal input from 3 is output or transmitted to the base unit 2 until the telephone line is disconnected.

Next, the replacement operation of the control software of the CPU 33 will be specifically described. First, CPU3
3 receives the signal indicating that the function changing special code has been received, and outputs the confirmation function changing code.
The function changing special code and the confirmation function changing code can be realized by using a specific digital code as a header added to the beginning of the block.

The CPU 33 receives the encoded block and the address of the block, performs error correction using the error correction code added to the encoded block, decodes and reproduces the block. After that, the decrypted block is output to the transmission / reception unit 34.

Then, the CPU 33 receives the input of the address and holds / stores the block in a buffer (not shown). Then, the CPU 33 receives the input of the next coding block, and thereafter repeats this operation until the telephone line is disconnected.

When the CPU 33 receives an encoded block instead of inputting an address, the CPU 33 performs error correction again on the block, decodes the block to reproduce the block, and then decodes the decoded block. The transmitter / receiver 34
Output to

Furthermore, when the mobile phone 3 enters an area where the radio wave from the base unit 2 does not effectively reach, the CP
If the U33 does not seem to receive the input of the address for a certain period of time, the CPU 33 outputs the decrypted block to the transmitting / receiving unit 34 again for transmission, and waits for the address reception from the master unit 2. When this operation is repeated and the mobile phone 3 enters the area where radio waves reach, the address is received from the base unit 2 and the next code block is received.

When the telephone line is disconnected, the CPU 33 transfers the contents of the buffer to the EEPROM 32. Further, the CPU 33, when the transmission / reception is not normally performed, such as when the mobile phone 3 enters an area where the radio wave from the base unit 2 does not effectively reach before the telephone line is disconnected, the CPU 33 To disconnect the contents of the buffer.

Next, the operation of the mobile phone 3 will be described. First, when the mobile phone 3 receives the input of the special code for changing the function, the signal received by the transmission / reception unit 34 of the mobile phone 3 becomes
Whether or not it is the special code for changing the function is determined, and since it is the special code for changing the function, a signal indicating that the special code for changing the function is received is output to the CPU 33, and thereafter, the update received from the master unit 2 Control software for CPU 33
The operation of outputting the signal to the master unit 2 and the signal input from the CPU 33 is performed until the telephone line is disconnected.

Then, the CPU 33 receives the signal indicating that the special code for changing the function is received, and outputs the checking function changing code. Then, the CPU 33 receives the input of the coded block and the address of the block. Therefore, the error correction code added to the coded block is used for error correction, and the block is reproduced to reproduce the block. After that, the decrypted block is output to the transmission / reception unit 34.

Then, the transmitting / receiving unit 34 transmits the decrypted block to the master unit 2. Then, if transmission / reception is normal, the CPU 33 receives an address input. Therefore, the CPU 33 stores the previously received and decoded block in the buffer as a part of the control software.

This operation is repeated until the entire control software is transmitted, and when the entire control software is transmitted, the telephone line is disconnected. And the CPU 33
Transfers the contents of the buffer to the EEPROM 32.

According to the mobile phone system of the present embodiment, the control software is stored in the EEPROM,
Further, at the time of updating, the control software is transmitted using a normal telephone line to update the contents of the EEPROM, so that the procedure for updating the control software can be simplified and the time and cost required for it can be reduced. There is an effect that can be reduced.

[0038]

According to the invention as set forth in claim 1, the mobile phone system in which the master unit wirelessly transmits the control software to be updated, and the mobile phone receives the control software to replace and update the control software, There is no need to collect the mobile phone, and the procedure for updating the control software can be simplified.
This has the effect of reducing the time and cost required for this.

According to a second aspect of the present invention, there is provided a mobile phone system comprising a master unit and a mobile phone, wherein the mobile phone stores control software in a storage section.
When updating the control software, the master unit divides the control software into blocks, adds error correction codes to the coded blocks, and transmits the blocks one by one to the mobile phone. After receiving it, performing error correction, decoding it, and sending it back to the master unit.The master unit compares the previously transmitted block with the returned block, and if they match, it was transmitted normally. And the next block are transmitted, and if they do not match, the mismatched coded block is retransmitted, and the mobile phone receives the signal indicating that it was transmitted normally and decodes it first. When the master unit finishes transmitting the control software after holding the stored blocks, the mobile phone replaces the control software in the storage unit with the control software consisting of the held blocks, and updates the mobile phone system. Because there is no need to recover the cellular phone, the procedure of the control software updating can be simplified, there is an effect of reducing the time and cost of it.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an outline of a mobile phone system according to the present invention.

FIG. 2 is a flowchart showing an operation of exchanging control software between a master unit and a CPU of a mobile phone.

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

[Explanation of symbols]

1 ... Onshore equipment, 2 ... Base unit, 3 ... Mobile phone, 31
... ROM, 32 ... EEPROM, 33 ... CPU,
34 ... Transceiver

Claims (2)

[Claims] 1. A mobile phone system, wherein when updating control software of a mobile phone, the software is wirelessly transmitted and received, and the mobile phone updates the software. 2. A mobile phone system comprising at least a base unit and a mobile phone for storing control software in a storage unit, wherein the base unit blocks control software for updating the mobile phone. Divide and add an error correction code and transmit as an encoded block, the mobile phone receives the encoded block and performs error correction,
Decrypt, play the block and send it back to the base unit.The base unit compares the transmitted block with the returned block, and if they do not match, sends the block again to the mobile phone. However, if they match, the signal indicating the normal transmission and the next coding block are transmitted to the mobile phone, and the mobile phone receives the signal indicating the normal transmission. Then, when the master device completes transmission of the entire control software after holding the corresponding block, the mobile phone controls the software stored in the storage unit by the control software including the held block. A mobile phone system characterized by updating.