JPH01246924A - Selective inter-call receiver with display function - Google Patents

Abstract

PURPOSE:To make the displaying form automatically distinguishable whether it is numeric form or aplhanumeric form so as to simplify the device at a base station and, at the same time, to make manual switching possible by providing a form confirming circuit, form switching circuit, manual changeover switch, display section, etc. CONSTITUTION:Signals from a base station are received by an antenna 1 and stored in a displaying content storing section 8 through an FM receiver 2, decoder circuit 3, etc., and, at the same time, sent to a form confirming circuit 9 where the displaying form of the information signals is discriminated whether the numeric displaying form or alphanumeric displaying form. The displaying form discrimination is performed in such a way that the received information is once converted into the alphanumeric displaying form and whether or not control characters are contained in the converted information is discriminated. When no control character is contained, the displaying form is discriminated as the alphanumeric displaying form and, when the control characters are contained, as the numeric form. Information of the discriminated results is displayed on a display section 6 through a form switching circuit 5. Moreover, when a subscriber has a doubt to the displayed information, he can forcibly switch the displayed information by means of a manual changeover switch 10 and, furthermore, registration of all subscribers is not required. Thus the device at the base station can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an individual selective call receiver, and more particularly to an individual selective call receiver with a display function that displays information after an individual call.

[Conventional technology]

Conventionally, this type of individual selective call receiver uses the NECD3 code method and the POC8A code method as the information code method.
There are models that use the G code system, and in the case of the POC8AG code system, there are two types of display formats: numeric display format and alphanumeric display format.

[Problem to be solved by the invention]

In the above-mentioned conventional POC8AG code type individual selective call receiver with display function, either a numeric display type or an alphanumeric display type is predetermined, so each type of receiver has its own However, for the reasons mentioned above, the base station has the disadvantage that it can only be used in systems of the same type as the base station, and for the reasons mentioned above, the base station does not store information for all subscribers about which type of individually selective call receiver the calling subscriber has. This has the disadvantage that the base station becomes more complex.

[Means to solve the problem]

The individual selective calling receiver with display function of the present invention includes: an alarm circuit; a display section; a calling number storage section that stores the calling number of the receiver; a display content storage section; and a calling number of the received signal. It compares the part indicating `` with the calling number stored in the calling number storage section to determine whether the received signal is for the receiver in question, and if it is the signal for the receiver in question, activates the 5-report circuit. a central processing unit that stores the signal in a display content storage unit if the received signal is a signal for the receiver as a result of the comparison by the decoder; and a central processing unit that identifies the code format of the received signal and provides an identification result. along with a format confirmation circuit that instructs the display format, a manual switching section that allows you to specify the display format of the received signal, and change the display format of the signal being displayed from the outside, and the identification results from the format confirmation circuit. The identification result is displayed on the display section along with the received signal according to the display format, and when the display format instruction is received from the manual switching section, or when it has been received in advance, a message to that effect is displayed, and the display and a format switching circuit that displays signals according to the format.

[Effect]

The format confirmation circuit automatically identifies the code format of the received signal, and the format switching circuit displays information according to the code format, so signals with different code formats can be received by the same receiver, and format confirmation is also possible. If there is any doubt about the circuit identification results, the display format can be forcibly changed using the manual switching section.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the individual selective calling receiver with display function of the present invention, FIG. 2 is a diagram showing the signal format of the POC8AG code, and FIG. 3 is the signal format of the receiver-specific calling number. FIG. 4 is a diagram showing the signal format of the numerical display code, FIG. 5 is a diagram showing the signal format of the alphanumeric display code, and FIG. 6 is a diagram showing an example of the transmission format of the alphanumeric display code. 7 and 8 are diagrams showing the format determination process of the received signal by the format confirmation circuit 9 of FIG. 1.

This individual selective call receiver with display function has antenna 1 and FM
Receiver I2, decoder 3, central processing unit 4, and format switching circuit 5
, display section 6 , call number storage section 7 , display content storage section 8 , type confirmation circuit 9 , manual changeover switch 10 , and speaker 12
and an alarm circuit 11 including an LED 13.

The decoder 3 receives the signal received by the FM receiver 2 via the antenna 1, compares the part of the signal indicating the calling number with the calling number stored in the calling number storage section 7, and outputs the received signal. It is determined whether the signal is for this receiver or not, and if the signal is for this receiver, the alarm circuit 11 is activated. The central processing unit 4 receives the data from the decoder 3 (the % sign is the received M).
If it is determined that the signal is for Il, this received signal is stored in the display content storage section 8. At the same time as the central processing section 4 stores the received signal in the display content storage section 8, the format confirmation circuit 9 identifies the code format of the received signal and instructs the format switching circuit 5 about the display format of the signal together with the identification result. The manual changeover switch 10 can be used as a forced mode to forcefully change the display format from the outside when there is a doubt about the displayed information according to the display format instructed by the format confirmation circuit 9. It is also possible to fix the display format, and in these cases, specify that the display format is the forced mode. The format switching circuit 5 receives a display format instruction from the format confirmation circuit 9 and the manual changeover switch 10, and displays the received signal on the display section 6 according to the display format, and also displays the instructed display format and If the display format instruction is from the manual changeover switch 10, subsequent instructions from the format confirmation circuit 9 are ignored, and the display format is blinked on the display section 6 to indicate the forced mode.

Next, in this embodiment, the POC8AG code will be explained, taking as an example a receiver that employs the POC8AG code system.

1. Structure of POC8AG code As shown in Figure 2, the POC8AG code consists of a preamble section and a batch section consisting of batches that continue from the first batch to the second batch. This signal is used to synchronize bits of the machine, and the batch section consists of eight consecutive frames each consisting of two codewords, starting with one codeword of a synchronization signal called a synchronization codeword (hereinafter abbreviated as SC). It consists of 17 code words.

2. Types of code words 1 Code words consist of 32 bits, and there are the following four types.

(1) Synchronization code word The synchronization code word is a signal for word synchronization of the following code word, and its bit contents are (2) Address and message code word The address code word is the calling number assigned to each receiver. The message codeword is a signal for sending information. Table 2 shows the respective bit configurations.

(3) Idle codeword The idle codeword is a signal used when there is no address codeword or message codeword.
Table 3 shows the bit contents.

3. Call number The call number is expressed in seven decimal digits as shown in FIG. 3(a). As shown in FIG. 3(b), this call number is binary-expanded into a 21-bit structure, and bit numbers 19 to 21 are used to identify the location of the frame, that is, the frame to which it belongs.

The transmission signal is transmitted in the form as shown in FIG. The bits after 22 are check bits. In addition, bit numbers 20 and 21 in the case of the address code word are function bits that make it possible to expand from the indicated address to four subordinate addresses, and in this case, the ring tone synchronization depends on which function bit is received. can be specified.

4. Numeric display code system This code system uses 4-bit binary numbers as shown in Table 3 to display the numbers 0 to 9, a hyphen, an emergency mark "U',"
Show left parenthesis, right parenthesis, special characters for digits, and spaces.

Taking information "01234567" in the numerical display code system as an example, the transmission form is shown in FIG. Transmission of these 8 characters requires 8 characters x 4 bits/character - 32 bits, but since one message code word has 20 message bits, two message code words are required. In this case, since there are 8 extra message bits, a space is added to form the code word.

5. Alphanumeric display code system As shown in Table 5, this code system displays alphanumeric characters, numbers, and each symbol using 7-bit binary numbers.

Table 5 Alphanumeric display code system information “ABCDEuf.

Taking ``hi'' as an example, the transmission form is shown in FIG.

To transmit these 10 characters, 10 characters x 7 bits/character =
70 bits are required, but since one message codeword has 20 message bits, four message codewords are required. In this case, there will be 10 extra message bits, so "EOT" is added to form the code word. Furthermore, when the amount of message data to be transmitted becomes too large to be accommodated in one batch, a method is adopted in which subsequent batches are used to transmit the data. An example is shown in FIG. Here, "' S 3 which is a calling number belonging to group 5
Message data to be transmitted to the receiver with ``M3
'' is being transmitted using two batches, first and second batches.

As described above, in the case of the POC8AG code method, there are two data display formats: numeric display format and alphanumeric display format, so the format confirmation circuit 9 determines which format the received signal is in. . The manual changeover switch 10 also has a normal mode, that is, a mode "A/N" according to the identification result of the type confirmation circuit 9 as a setting mode.
It is assumed that there are two forced modes: mode "A" for forcing an alphanumeric display format, and mode "N" for forcing a numeric display format.

Next, the operation of this embodiment will be explained.

The signal sent from the base station is received by antenna 1,
It is demodulated by the FM reception Vs2 and sent to the decoder circuit 3 as a digital signal. In the decoder circuit 3, first,
The part of the received signal that corresponds to the calling number is compared with the number stored in the calling number storage section 7. If they match, the alarm circuit 11 is activated, the speaker 12 emits an alarm sound, and the LED 13 is turned on or blinks. Subsequently, the information signal of the received signal is sent from the decoder 3 to the central processing section 4 and stored in the display content storage section 8. At the same time, the information signal is sent to the format confirmation circuit 9, which determines whether the information signal is in a numeric display format or an alphanumeric display format. Here, the received information is first converted into an alphanumeric display format, and the format is determined based on whether or not it contains control characters as shown in the second column of Table 5. If no control characters are included, it is determined that it is an alphanumeric display format, and if a control character is included, it is determined that it is a numeric display format. Here, if the received information is "01234567" in numeric display format, it is first converted to alphanumeric display format (Figure 7 (1)), and as a result, a control character TC (DLE) is present. Therefore, the received information is determined to be in the numerical display format and the format switching circuit 5
and the format switching circuit 5 changes to the numerical display format (Fig. 7 (2)
)) and the information is displayed on the display unit 6 together with "N jl" indicating the display format, that is, the numerical display format (Fig. 7 (3)). 05372-6144...'', it is similarly converted to alphanumeric display format (Figure 8 (1)), and as a result, since there are no control characters, it is determined to be alphanumeric display format and that fact is indicated. “A” and information “Pf16A”
(Figure 8 (2)). At this time, if the subscriber has doubts about this displayed information, the manual changeover switch 10
It is possible to forcibly switch to the numeric display format "N". This is a special case where the combination of numeric information happens to be arranged in an alphanumeric display format and does not result in control characters.

Furthermore, even when the transmitted information is short, it is conceivable that n has a high probability of not generating a υ control character.

In order to compensate for the drawbacks in such cases, it is essential to manually switch the format. In this case, in order to indicate that the mode has been switched to the forced mode and to alert the subscriber, the type 6 [display "N'°" is blinked (it only lights up during automatic judgment).

〔Effect of the invention〕

As explained above, the present invention automatically determines and displays a numerical display format or an alphanumeric display format, and in some cases, manually selects and displays a desired format. This eliminates the need for the base station to register (memorize) which type of individual selective call receiver each subscriber has for each subscriber. The device is simple, and there is a manual changeover switch for forced switching between numeric and alphanumeric display formats, so in the unlikely event that the individual selection extrusion receiver makes a mistake and displays an abnormal display. This has the advantage that even if one format is currently in use, you can switch to the other format and check it at any time.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the individual selective calling receiver with display function of the present invention, FIG. 2 is a diagram showing the signal format of the POC8AG code, and FIG. 3 is the signal format of the receiver-specific calling number. FIG. 4 is a diagram showing the signal format of the numerical display code, FIG. 5 is a diagram showing the signal format of the alphanumeric display code, and FIG. 6 is a diagram showing an example of the transmission format of the alphanumeric display code. 7 and 8 are diagrams showing the format determination process of the received signal by the format confirmation circuit 9 of FIG. 1. 1... Antenna, 2... FM receiver, 3...
...Decoder, 4...Central processing unit, 5...
Type switching circuit, 6...Display section, 7...Calling number storage section, 8...Display content storage section, 9...Type confirmation circuit, 10...Manual changeover switch, 11...Alarm Circuit, 12...Speaker, 13...LED.

Claims (1)

[Scope of Claims] 1. An individual selective calling receiver with a display function, comprising: an alarm circuit; a display section; a calling number storage section that stores a calling number of the receiver; a display content storage section; The part indicating the calling number of the received signal is compared with the calling number stored in the calling number storage unit to determine whether the received signal is a signal for the receiver, and if it is a signal for the receiver. a decoder that activates an alarm circuit; a central processing unit that stores the signal in a display content storage unit if the received signal is a signal for the receiver as a result of comparison by the decoder; and a central processing unit that identifies the code form of the received signal. A format confirmation circuit that instructs the display format along with the identification result, a manual switching section that allows you to specify the display format of the received signal, and change the display format of the signal being displayed from the outside, and the format confirmation circuit. Displays the identification result along with the received signal on the display section according to the identification result and display format, and displays that fact when the display format instruction is received from the manual switching section or when it has been received in advance. An individual paging receiver with a display function, further comprising a format switching circuit that displays a signal according to the display format.