JPH11225355A - Mobile radio terminal and selective calling receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the mobile radio terminal such as a selective calling receiver by which information is detected even when prescribed information such as a free word start code is missing and numerals in a prescribed digit number successive thereafter are recognized as character information. SOLUTION: The mobile radio terminal that recognizes numerals in a prescribed digit number successive to prescribed information as character information, for example, the mobile radio terminal that expands a numeral code in succession to a free word start code (*2*2) into a free word character is provided with a means that detects missing of the free word start code, that is, a step where characters '2', '-' (code 2*2) (step S23). Thus, even when a sender transmits the code, forgetting a code '*' required for tone signal switching, the free word is correctly expanded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a mobile radio terminal such as a selective call receiver capable of displaying a free word.

[0002]

2. Description of the Related Art In a system such as a selective call receiver, a message is transmitted to a receiver by a telephone having tone transmission, and a signal of a pushed button is transmitted to the receiver via a base station. The receiver recognizes the presence of the characters "-" and "-" in the message code as a free word start code, and expands the subsequent two-digit number code into a free word character according to the conversion table of FIG. . When transmitting a numeric code or a specific symbol code other than a numeric code, a button is pushed as shown in FIG.

The free word start code is "*
Sent by pressing the button "2 * 2". However, when a message is sent to the receiver by a telephone or the like that switches to a tone signal with "*",
If you forget to press and put the free word at the beginning of the message, the first "*" is transmitted as "2 * 2" from the telephone because of the tone switching. For this reason, since the free word start code is lost and received by the receiver, the subsequent numeric codes are not expanded into free words, and there is a problem that the message content cannot be understood.

[0004]

As described above, if the user forgets to press "*" and sets the free word at the beginning of the message, the free word start code is lost in the receiver and the message is received. Does not expand correctly,
There was a problem that the contents of the message could not be understood.
Further, when trying to decode this, it was necessary to refer to the conversion table each time.

Accordingly, the present invention eliminates this problem and detects even if predetermined information such as a free word start code is missing, and recognizes a predetermined number of digits following it as character information. It is an object of the present invention to provide a mobile radio terminal such as a selective call receiver capable of performing the following.

[0006]

SUMMARY OF THE INVENTION The present invention receives a call signal transmitted from a base station via a radio line and a message signal in a format including a predetermined number of digits following predetermined information. In a mobile radio terminal that recognizes a predetermined number of digits included in a message signal as character information when receiving a call signal to its own device, detection means for detecting that predetermined information is missing in the message signal, And a recognizing means for recognizing a predetermined number of digits as character information when the detection means detects a lack of the predetermined information.

[0007] By adopting such a configuration, for example, a code "*" that is used by a sender to switch to a tone signal is provided.
Even if the user forgets to send the free word at the beginning of the message, the free word is correctly developed in the mobile radio terminal, so that the recipient can correctly understand the message content intended by the sender.

Accordingly, when the free word start code is missing, the trouble of decoding the message content can be saved. Further, a switching means for switching whether or not to operate the detection means may be provided. Specifically, the mobile wireless terminal having such a configuration may be, for example, a selective call receiver.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the drawings, the same reference numerals indicate the same or corresponding parts. FIG. 1 shows a configuration of a selective call receiver (pager) according to an embodiment of the present invention. The selective call receiver shown in FIG. 1 includes a receiving unit 10, a storage unit 20, an operation unit 30, a display unit 40, and a ringing unit 5.
0 and a control unit 100.

The receiving section 10 includes an antenna 11, a radio circuit 1,
2. It comprises a synthesizer 13 and a demodulation circuit 14. A paging signal transmitted from a base station (not shown) via a space is received by an antenna 11, and the received paging signal is input to a radio circuit 12.

The wireless circuit 12 is connected to a control unit 100 described later.
The intermittent reception is performed by controlling the operation timing, and the received signal is frequency-converted into an intermediate frequency or a baseband frequency using a local signal from the synthesizer 13. The synthesizer 13 includes the control unit 1
A local signal of a frequency corresponding to the instruction from 00 is generated.

[0012] The demodulation circuit 14 demodulates the received signal frequency-converted by the radio circuit 12, converts the demodulated signal into digital data, and inputs the digital data to the control unit 100. The demodulation circuit 14
Performs an error correction process on the digital data, decodes the data, reproduces the ID code and the message code included in the received signal by the decoding, and
Enter 00.

The storage unit 20 uses a semiconductor memory such as a ROM or a RAM as a storage medium. The storage medium stores various control data and user data in addition to the control program of the control unit 100 and its own ID data. , And an area for storing received message codes and the like, and a free word storage area 21,
A fixed message storage area 22 and a user message storage area 23 are provided.

As shown in FIG. 6, the free word storage area 21 is an area for storing a conversion table in which one character data is associated with a free word number code in advance. The free word number code is a free word start code “* 2” in the received message code.
* 2 ”is a two-digit numerical code following“ 2 ”.

The fixed message storage area 22 is an area for storing in advance a table in which a message number code and message data such as "please call", which is frequently transmitted, are associated with each other. The message number is
In the received message code, it is a two-digit numeric code following the fixed phrase start code such as “* 4 * 4”.

The user message storage area 23 is an area for storing a table in which a message number code is previously associated with arbitrary message data created by the user.

The operation unit 30 includes: It plays the role of an input interface that accepts requests from users. Various setting operations, storage unit 2
It is used when reading / erasing data stored in the storage unit 0 and creating the above-described user message using the data stored in the storage unit 20.

The display section 40 includes a display signal generation circuit 41,
And a display 42. The display signal generation circuit 41 is controlled by the control unit 100 and generates a signal for displaying a character specified by the control unit 100 on the display 42.

The display 42 is, for example, an LCD (Liquid)
d Crystal Display)
The display according to the display signal generated by the display signal generation circuit 41 is performed. The display contents include, in addition to the received message, the status of the own device (whether the message has been stored, the remaining amount of memory in the storage unit 20, the received radio wave condition).
And data stored in the storage unit 20 are displayed.

The sounding section 50 includes a sounding signal generation circuit 51,
And a speaker 52. The sound signal generation circuit 51 is controlled by the control unit 100, and generates a sound signal in accordance with an instruction from the control unit 100. The speaker 52 is
The sound signal generated by the sound signal generation circuit 51 is input, and an audible sound is output.

The control unit 100 includes, for example, a microcomputer as a main control unit, and controls the above-described units in an integrated manner. The control unit 100 receives a call signal, performs a call notification operation, records / reads a received message code, and outputs a user message. It has control functions such as creation / recording.

The control unit 100 is provided with the storage unit 20 described above.
Has a control function of determining the transmitted message data from the received message code based on the data stored in the storage unit, and displaying the message data obtained by the determination on the display unit 40.

Next, the call notification operation of the selective call receiver having the above configuration will be described below. The control unit 100 includes the receiving unit 10
Is detected from the digital data from the demodulation circuit 14 at a timing when a calling signal addressed to the own device may be sent, and the reception operation of the radio circuit 12 is intermittently controlled so as to receive only this timing. At this time, the control unit 1
00 controls the frequency of the local signal generated by the synthesizer 13 to control the reception frequency of the wireless circuit 12.

Next, the control unit 100 checks the ID code reproduced by the demodulation circuit 14 from the digital data received at the above timing with the ID code of the own device stored in the storage unit 20 in advance. When a match between the two codes is detected by the collation, it is recognized that a call to the own device has occurred, for example, a sound signal is generated by the sound signal generation circuit 51, and an audible sound is generated from the speaker 52, This notifies the user of the occurrence of the call.

The control unit 100 stores the message code reproduced by the demodulation circuit 14 together with the ID code in the free word storage area 21, the fixed message storage area 22, and the user message storage area 23 as necessary. The display unit 40 is converted to character data and message data by referring to the respective tables, and the display unit 40 is controlled to display the message data.

When the received message code is a numeric code, the message is normally displayed with its numeral, and when the received message code is the code shown in FIG. 5, the corresponding symbol is displayed. * 2 * 2 ”, two digits following the numeral code are stored in the storage unit 20
In accordance with the conversion table shown in FIG.

Here, when transmitting a message having a free word character at the head to a receiver by a telephone or the like in which the sender switches to a tone signal with "*", the sender first switches to a tone signal, so that "*" Is pressed and the free word start code "* 2 * 2" (that is, the free word start character "-""-") is pressed.
Since "2 * 2" is detected as a free word start code, the subsequent two-digit number code can be expanded into free word characters and displayed.

However, if the free word is set at the head of the message while forgetting to press "*" for switching to a tone signal, the first "*" is switched from the telephone to "2 * 2" ( That is, the characters "2" and "-")
Is sent. For this reason, the free word start code is lost and received by the receiver.

FIG. 3 shows an example of a display when such a message is received. The sender pushes a button so that the message is transmitted as a free word as shown in FIG. In this case, the last “##” is an end code,
When this button is pushed, a message is sent from the base station to the receiver.

At this time, since the first "*" is for tone switching, the receiver receives a message in which the start code is missing, as shown in FIG. 3 (b). If the free word start code is missing, it will not be recognized as a free word,
If normal processing is performed as before, a message that is not expanded into a free word is displayed as shown in FIG.

In order to improve this, in this embodiment, there is provided means for detecting that a start code is missing in addition to the free word start code. By providing a means for detecting the lack of this start code, the following two-digit numeric code is expanded as free word characters in accordance with the conversion table shown in FIG. 6 and the expanded content is displayed on the display 42. can do.

FIG. 2 shows a procedure for processing the message code by providing means for detecting that the start code is missing in the control unit 100. When the message is received (step S21), it is determined whether the character is a free word start character "-" or "-" (step S22). If it is a free word start character, a step of determining two digits following the numerical code (step S22). The process proceeds to step S24). If the character is not a free word start character, "2" and "-" are also regarded as free word start characters as means for detecting the next lack of a start code. The process proceeds to the step of determining whether or not "-" (step S23). Therefore, as described above, since the tone is switched with “*”, even if a part of the start code is lost and becomes “2” or “−”, the characters “2” and “−” are replaced in this step (step S23). If it is determined that there is, the process proceeds to the step of determining the subsequent two-digit number code (step S24).

Accordingly, the subsequent two-digit numeric code is used as a free word character, and the two-digit numeric code is developed into a free word according to the conversion table shown in FIG. 6 (step S25). This operation is performed until the free word ends. (For example, when a free word end code "* 8" is detected) (step S2).
6), the expanded contents are displayed on the receiver (step S27). As a result, as shown in FIG. 3 (d), the contents expanded into free words are displayed on the receiver.

The free word start character "-"
If neither "-" nor any of the characters "2" and "-" with a part of the start code missing is detected, or if these are detected but the subsequent two-digit number code is not detected, The process proceeds to ordinary numeral recognition (step S28), and the numerals or specific symbols shown in FIG. 5 are recognized.

As described above, even if the free word is transmitted by forgetting "*" and the free word start code is lost, the free word is displayed on the receiver and displayed.
The recipient can understand the contents of the message correctly.

By the way, in the case of the above configuration, it is possible to cope with a case where the free word is set at the head of the message while forgetting to press "*" for switching to the tone signal. If the user tries to transmit the character "2-1583722" after pressing "*" and presses the button correctly in this order and transmits, the normal display as shown in FIG. Since the received signal is the same as when the free word is placed at the beginning of the message while the user forgets to press "*" to switch to the "?", The contents in which the free word is expanded as shown in FIG. 3D are displayed. Occurs.

In view of the above, there is provided a means for performing mode switching between a case where the means for detecting the loss of the free word start code is operated (start code missing detection mode) and a case where it is not operated (normal mode). Is the operation unit 3
This can be solved by selecting and specifying one of the modes by operating from 0.

An embodiment in which a means for performing this mode switching is provided will be described. FIG. 4 shows a procedure for processing a message code in the control unit 100 of this embodiment.

That is, before the step of determining whether or not the character is "2" or "-" (step S23) as a means for detecting that the start code in FIG. (Step S41), and when the start character missing detection mode is designated, the process proceeds from this step to the step of determining whether the character is "2" or "-" (step S23). When the mode is not specified, that is, when the mode is the normal mode, processing is performed so as to proceed to a normal digit recognition step (step S28).

With this configuration, FIG.
A normal display can be used as shown in FIG. In the above description, the case of the selective call receiver has been described. However, the present invention is not limited to the selective call receiver, but may be applied to other mobile wireless terminals such as a portable wireless telephone device and a simple portable wireless telephone device (PHS). The present invention can also be applied to terminals.

[0041]

As described above, according to the present invention,
Provided is a mobile radio terminal such as a selective call receiver that can detect, even when predetermined information such as a free word start code is missing, and recognize a predetermined number of digits that follow thereafter as character information. Can be.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing a procedure for processing a message code according to the embodiment of the present invention.

FIG. 3 is a diagram illustrating an example of a received message according to another embodiment of the present invention.

FIG. 4 is a flowchart showing a procedure for processing a message code according to another embodiment of the present invention.

FIG. 5 is a diagram showing a correspondence relationship between a push button and a numeric code or a specific symbol code received by a receiver in the embodiment of the present invention.

FIG. 6 is a conversion table showing the correspondence between free word number codes and character data according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Reception part 11 ... Antenna 12 ... Wireless circuit 13 ... Synthesizer 14 ... Demodulation circuit 20 ... Storage part 21 ... Free word storage area 22 ... Standard message storage area 23 ... User message storage area 30 ... Operation part 40 ... Display part 41 ... Display signal generation circuit 42 ... Display unit 50 ... Sound generation unit 51 ... Sound generation signal generation circuit 52 ... Speaker 100 ... Control unit

Claims (4)

[Claims] An apparatus receives a call signal transmitted from a base station via a radio line, and a message signal in a format including a predetermined number of digits following predetermined information, and transmits a call signal to the terminal. A mobile radio terminal that, when received, recognizes a predetermined number of digits included in the message signal as character information, detecting means for detecting that the predetermined information is missing in the message signal; When a missing is detected,
A mobile wireless terminal comprising: a recognition unit configured to recognize a predetermined number of digits as character information. 2. The mobile radio terminal according to claim 1, further comprising switching means for switching whether or not to operate said detection means. 3. A paging signal transmitted from a base station via a radio line, and a message signal having a format including a predetermined number of digits following predetermined information, and receiving a paging signal to the own device. A selective calling receiver that, when received, recognizes a predetermined number of digits included in the message signal as character information, detecting means for detecting that the predetermined information is missing in the message signal; When missing information is detected,
And a recognizing means for recognizing a predetermined number of digits as character information. 4. The selective call receiver according to claim 3, further comprising switching means for switching whether to activate said detecting means.