JPH0965401A - Radio selective calling receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to store the message without deleting the message which does not want to be seen by a 3rd party by making impossible to read out and display the message for the people except the people knowing this cipher, adding the cipher to the received message. SOLUTION: A received radio selective calling signal is demodulated by a radio section 2 and given to a decoder 3. The decoder 3 compares a call number (ID) from a radio section 1 with its own call number received from a ROM 5 via a memory control section 4. When they are coincident, a message signal in succession to the ID is fed to the control section 4 from the decoder 3. The control section 4 stores the message signal to a RAM 6 and a display section 9 displaces the message signal. When the user desires security on this message from other party, a cipher information input section inputs cipher, the message stored in the RAM 6 is transferred to a ciphering message memory 7 together with the cipher.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio selective call receiver, and more particularly to a radio selective call receiver having a display control function for received messages.

[0001]

2. Description of the Related Art Conventionally, a message received and stored is easily read and displayed by a message read operation. That is, the third non-radio selective call receiver other than the carrier.
A person can operate the radio selective calling receiver to easily display the stored message.

[0002]

As described above, in this type of radio selective call receiver, a user other than the user can easily read and read the message, so that the user wants to show it to a third party. You need to quickly delete the missing messages.

The object of the present invention is to solve the above-mentioned problems,
It is an object of the present invention to provide a radio selective call receiver capable of storing and holding a message which is not desired to be seen by anyone other than the owner of the radio selective call receiver.

[0004]

In order to achieve the above object, a radio selective calling receiver according to the present invention includes a receiving means for receiving a radio selective calling signal from a sender, and the radio selective calling signal included in the radio selective calling signal. Storage means for storing the message, display means for displaying the message, means for adding cryptographic information that prohibits the display of the message, and determination for determining whether to display the message with the cryptographic information added And means.

The storage means preferably comprises a first storage section for storing the message to which the cryptographic information is added and a second storage section for storing a message to which the cryptographic information is not added.

[0006] When the encryption information is input while the display means is displaying the message, the message can be prohibited from being displayed.

It is preferable that the judging means comprises an input means for inputting the cipher information and a comparing means for comparing the cipher information input by the input means with the cipher information added to the message signal. .

Further, when the comparing means determines that they match, a message designated by the input means can be displayed.

By adopting the above-mentioned configuration, the radio selective call receiver according to the present invention adds a cipher to the received message so that only a person who knows the cipher can read and display the message. be able to.

Therefore, the message that the third party does not want to see can be stored in the memory without being deleted.

[0011]

DETAILED DESCRIPTION OF THE INVENTION The present invention will now be described in detail with reference to the drawings.

FIG. 1 is a configuration block diagram of a radio selective calling receiver showing an embodiment of the present invention.

The radio selective call receiver includes an antenna 1, a radio unit 2, a decoder 3, a memory control unit 4, a read only memory (ROM) 5, a RAM 6, a cipher message memory 7,
The display control unit 8, the display unit (display) 9, the cryptographic information input unit 10, and the cryptographic comparison unit 11 are included.

First, the message receiving, storing and reading operations of the radio selective calling receiver will be briefly described.

The radio selective calling signal received via the antenna 1 is demodulated by the radio section 2 and input to the decoder 3. The decoder 3 stores the calling number (ID) included in the demodulated signal from the wireless unit 1 in the ROM via the memory control unit 4.
It is compared with its own calling number supplied from No. 5. In this comparison, if they match, the message signal following the ID is supplied from the decoder 3 to the memory control unit 4. On the other hand, if they do not match, the signal after the ID is not received. The memory control unit 4 stores the message signal in the RAM 6. The stored message signal is sent to the display unit 9 via the display control unit 8.
Is displayed in.

When the user looks at the displayed message,
If you decide that you do not want others to see this message,
The cryptographic information is input from the cryptographic information input unit 10. When this cipher information is input, the message signal stored in the RAM 6 is stored in the cipher message memory 7 together with the cipher information.

When reading the message signal stored in the cipher message memory 7, the cipher information added to the message signal is input from the cipher information input unit 10. The cipher comparison unit 11 determines whether or not the inputted cipher information matches the cipher information added to the stored message signal, and if they match, the cipher message memory 7 through the display control unit 8 with the message signal. Read out and displayed on the display unit 9. On the other hand, if the input cipher information does not match the cipher information stored in the cipher message memory, the display process is not performed.

2A to 2C show the signal format of the radio selective calling signal. Here, as an example, P
The signal format of the OCSAG signal is shown. FIG.
In (a), the radio selective calling signal includes a preamble signal PR, a synchronization code SC, and a plurality of frames F1 to F8. Each frame consists of two codewords.

FIG. 2B shows one codeword. Each codeword consists of 32 bits and has 1 identification bit, 20 data bits, 10 check bits and 1 parity bit.
The identification bit is used to distinguish whether the data that follows is a calling number or a message signal. For example, if the identification bit is "0", the data signal following the identification bit is a call number, and if it is "1", the data signal is a message signal.

FIG. 2C shows a signal format when the data signal is a message signal.

FIG. 3 is a flow chart for explaining the details of the message reception, storage and cipher addition processing of the present invention.

First, it is determined whether or not the calling number (ID) included in the radio selective calling signal matches the calling number of its own stored in the ROM 5 (step S101). When it is determined that they match, it is determined whether the following codeword is a message signal (step S102). If it is a message signal, this message signal is stored in the RAM 6 (step S103). The message signal is stored and then displayed on the display unit 9 (step S104).

When the user inputs the cipher information from the cipher input section 10, the message signal is read from the RAM 6,
The inputted cipher information is added and stored in the cipher message memory 7 (step S106). At this time, the cryptographic information does not necessarily have to be added. For example, when only one piece of cipher information is used, it is not necessary to distinguish the cipher information, so it is only necessary to transfer the message signal from the RAM 6 to the cipher message memory 7.

In the above-described embodiment, the memory to be stored is distinguished depending on the presence or absence of the cryptographic information, but the present invention is not limited to this.
Both message signals may be stored separately in one memory.

FIG. 4 shows a control flow chart for explaining details of the reading and display processing of the stored message signal.

When the message read operation is performed (step S201), it is determined whether a predetermined time t has elapsed (step S202). When the cryptographic information is input from the cryptographic information input unit 10 before the time t has elapsed (step S203), it is determined whether this cryptographic information matches the cryptographic information added to the message signal (step S204). If it is determined that they match, the message signal included in the designated cipher information is read from the cipher message memory 7 (step S205).

On the other hand, if the cipher information is not input within the time t, the message signals stored in the RAM 6 are sequentially read (step S206). The message signal read in steps S205 and 206 is displayed on the display unit 9 by the display control unit 8 (step S20).
7).

If the input decryption information does not match the encryption information, the message signal stored in the encryption message memory 7 is not read, and the process ends.

In the above-described embodiment, the cipher information is added to each message signal, and when the cipher information matching the cipher information is input, the corresponding message signal is read and displayed. Only one type is determined, and only the message signal specified by this cipher information is stored in the cipher message memory. When this cipher information is input, the message signals stored in the cipher message memory are sequentially read out. , May be displayed.

[0030]

As described above, the radio selective call receiver according to the present invention adds the cipher to the received message, so that only the person who knows the cipher can read and display the message. can do.

Therefore, the message that the third party does not want to see can be stored in the memory without being deleted.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of a radio selective calling receiver according to an embodiment of the present invention.

2A to 2D are signal formats of a radio selective calling signal.

FIG. 3 is a flowchart for explaining details of message reception, storage and cipher addition processing of the present invention.

FIG. 4 is a control flowchart for explaining details of stored message signal reading and display processing according to the present invention.

[Explanation of symbols]

 1 ... Antenna 2 ... Radio part 3 ... Decoder 4 ... Memory control part 5 ... ROM 6 ... RAM 7 ... Cipher message memory 8 ... Display control part 9 ...・ Display unit 10 ・ ・ ・ Decryption information input unit 11 ・ ・ ・ Cryptographic comparison unit

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[Procedure amendment]

[Submission date] February 16, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of drawings]

FIG. 1 is a configuration block diagram of a radio selective calling receiver according to an embodiment of the present invention.

2A to 2C are signal formats of a radio selective call signal.

FIG. 3 is a flowchart for explaining details of message reception, storage and cipher addition processing of the present invention.

FIG. 4 is a control flow chart for explaining details of reading and display processing of a stored message signal of the present invention.

[Explanation of Codes] 1 ... Antenna 2 ... Radio part 3 ... Decoder 4 ... Memory control part 5 ... ROM 6 ... RAM 7 ... Cryptographic message memory 8 ... Display Control unit 9 ・ ・ ・ Display unit 10 ・ ・ ・ Decryption information input unit 11 ・ ・ ・ Cryptographic comparison unit

Claims (5)

[Claims] 1. A radio selective calling receiver, receiving means for receiving a radio selective calling signal from a sender, storage means for storing a message included in the radio selective calling signal, and display means for displaying the message. A radio selective calling receiver comprising: a means for adding cryptographic information that prohibits the display of the message; and a determination means for determining whether to display the message to which the cryptographic information is added. 2. The storage means comprises a first storage section for storing a message to which the cryptographic information is added and a second storage section for storing a message to which the cryptographic information is not added. The radio selective calling receiver according to claim 1. 3. The radio selective call receiver according to claim 1, wherein the message is prohibited from being displayed when the encryption information is input while the display means is displaying the message. 4. The judging means comprises an input means for inputting the cipher information, and a comparing means for comparing the cipher information input by the input means with the cipher information added to the message signal. The radio selective call receiver according to claim 1, wherein: 5. The radio selective calling receiver according to claim 4, wherein a message designated by said input means is displayed when said comparing means determines that they match.