JPH02243027A - Radio selective call receiver with display function - Google Patents

Abstract

PURPOSE:To set the file constitution to store sequence information and to designate a section by storing a file number representing the order of arrival, judging information of use of the sector and judging information of use of the file. CONSTITUTION:A signal received by an antenna 1 is demodulated by a radio section 2 and the demodulated signal is converted into a digital signal able to be read by a decoder 4 at a waveform shaping circuit 3. The decoder 4 compares its own call number stored in a P-ROM 5 with a digital signal from the circuit 3 and sends a call signal to message processing section 6 in the case of the coincidence. An internal RAM is provided in the processing section 6 and stored with the file number representing the order of arrival, judging information of use of the sector and judging information of use of the file. Thus, the designation of a sector used in a message file stored in a storage area corresponding to each message information and file constitution to store the sequence information are set.

Description

[Detailed description of the invention] The present invention relates to a wireless selective calling receiver with a display function.

In recent years, wireless selective calling receivers have made remarkable progress.

Not only does the selective calling signal (a specific number assigned to each subscriber) notify the reception, but also a simple message is displayed by adding a message information signal to the selective call signal. Service is considered. For this reason, the receiver stores message information 1.
Multi-functionality with functions such as display and erasure is being attempted.

To display this message information, after receiving the 1 selection call signal and the message information signal, a notification tone is sent to notify that the message information signal has been received, and at the same time, the 1 display device is driven to display the message information.

Note that since there are cases where the subscriber is called frequently, or where the subscriber does not immediately take action in response to the message information after receiving it,9 the message information is usually configured to be able to store a plurality of pieces of message information. At present, the content of message information is mainly numerical information, and at most 20 pieces of numerical information are sent as a message information signal. but,
In the case of textual information, which is expected to become more widespread in the future, it is expected that it will be essential to convey information several to several tens of times as much as numeric information. Therefore, a function of receiving and storing variable length message information is essential as a receiver function.

An object of the present invention is to provide a functional radio selective calling receiver having such functions.

Enables designation of storage units (hereinafter referred to as sectors) used in message files stored in the storage area corresponding to individual message ti9 reports and setting of file configuration for storing order information. There is a particular thing.

The present invention is a wireless selective calling receiver with a display function that receives a selective calling signal and a message signal following the selective calling signal, stores and displays message information obtained by decoding the message signal, and stores and displays message information obtained by decoding the message signal. a first storage means having a capacity; a first control means for randomly storing the message information at least -a in the first storage means; and storage of the first storage means in which the message information is stored. a second storage means for storing a sector number representing an area in correspondence with each message information; a third storage means for storing a file number representing an order of arrival in correspondence with each message information; and fourth storage means for storing, in correspondence with each sector number of the means, determination information as to whether or not the sector is used.

It is characterized by including a fifth storage means that corresponds to each file number of the second storage means and stores discrimination information as to whether or not the file is being used.

Hereinafter, nine aspects of the present invention will be explained in detail using the drawings.

FIG. 1 shows an example of the configuration of a received signal of a selective call receiver.
In FIG. 1(a), P is a prefix signal.

F is a frame synchronization signal, N is a selective call signal, and I is a message signal.

A plurality of message signals 1 are arranged as necessary depending on the message length. FIGS. 1(b) and (c) show BCH (3
1, 21) with one parity bit added. These signals are in the 21-pit information bit area INF.
, a 10-bit check bit area CK, and a 1-bit even parity EP, each word consisting of 32 bits. The most significant bit MSB of the information bit area INF is used to distinguish between a selective call signal (logic "0") and a message signal (logic "1"), and the remaining 20 bits are used as a subscriber number information area or a message information area.

The message information is in binary coded decimal (BCD) code (4
bit configuration) or an 150-7 bit code is used. The sending order is the least significant bit L of the first message code.
The message signals are sent out in order from the SB, and a plurality of message signals are sent out depending on the message length. BC used in messages
A possible method for specifying the D code or ISO code is to use the selective call signal. In other words.

This is a method of switching between a selective calling signal that sends a message signal using a BCD code and a selective calling signal that sends a message signal using an 150 code.If the receiver can detect at least these two signals, it can detect each message signal. Can be decrypted.

FIG. 2 is a block diagram showing an example of a wireless selective calling receiver according to the present invention.

A radio signal received by the antenna 1 is amplified by the radio section 2 and subjected to UI tuning. The demodulated signal is converted by the waveform shaping circuit 3 into a waveform (digital signal) that can be read by a subsequent decoder 4.

The decoder 4 is a writable read-only memory (P-RO).
M) It compares its own calling number written in advance in 5 with the digital signal from the waveform shaping circuit 3, and when they match, it sends a signal to the message processing section 6 to notify it of the call. The message processing unit 6 uses this signal to decode the message signal, and when the message signal ends, notifies the decoder 4 of this fact, outputs a sound signal to the amplifier 7 via the decoder 4, and outputs a sound signal to the speaker 8. drive Further, the message processing unit 6 stores the decoded signal of the message signal in the internal RAM (RaIldom^ec
ess Me+*ory) in a file format, and provides visual information via the one-light-emitting display unit LCD9.

The RT (reset) switch 10 via the decoder 4
The change information and status signal are sent to the message processing unit 6, and the sounding, stopping and starting of the LCD display, etc. are performed. Switches SWI to SW3 are connected to the message processing unit 6, and each message file is protected by these switches.

Set the operation mode for erasing, displaying empty areas, etc. A detailed explanation of these operation modes will be given later. The output terminal 14 is a terminal for outputting data in the message file to the outside, and this operation is also executed in the operation mode. The crystal oscillator 15 is a clock generating oscillator that operates the decoder 4.

FIG. 3 shows an example of the block configuration of the message processing section 6 described in FIG.

The 1-chip CPU 21 is connected to the decoder 4.

Input/output terminal 1 interrupt input terminal, program memory.

It has a built-in data memory, serial input/output terminal, and timer, and receives and decodes the message signal mentioned above, and sends the decoded message information in the message file format.
It is stored in the RAM 22 using the SO/SCK and CE2 signals. In addition, the CPU 21 uses S I/So/SCK and CEI
The decoded message information is transferred to the LCD driver 23 using a signal.

Provides visible information to the LCD 9. On the other hand, switch SWI
~SW3 is also connected to the CPU 21.

Next, each signal connecting between the decoder 4 and the CPU 21 will be explained.

The signal DATA is for transmitting a message signal sent following the 9 selection call ratio multiple. When the 0 selection call signal is received, the internal gate of the decoder 4 opens and the subsequent reception signal is sent out. This signal is the message end signal MEND from the CPU 21.

It stops when the gate from the inside is closed.

The signal CLK is a synchronous clock signal for receiving the message signal sent by the signal DATA.
Data is captured at the rising edge of LK. This signal C
LK is normally at a high level and is sent out when a message signal is sent out, so it can also be used as a start signal.

The signal REC is a reception control signal that notifies the received selective calling number when receiving multiple selective calling signals, and this signal allows the message signal to be decoded using BCD code or I
It is determined which SO code is to be used.

The 2kllz signal TCL is the original clock signal of the timer. The CPU 21 realizes a timer function such as automatically stopping the visual display on the LCD 9 by counting the number of pulses of the signal TCL using a built-in timer.

The signal RTS is a positive pulse signal sent when the state of the RT switch 10 changes. This signal RTS can also be used as a start signal like the signal CLK.

Signal RT is a state signal of RT switch 10.

It is normally at a high level and outputs a low level signal when the RT switch 10 is pressed.

The signal ALTC is an alert control signal for outputting the aforementioned sound signal, and multiple types of sound signals can be specified by the alert signal ALT.

The signal MEND is a message end notification signal that notifies the decoder 4 that reception of the message signal is completed.

Serial signal S I/SO/S is connected to external output terminal 14.
CK and signal CE3 are sent out, and it is also possible to print message information using these signals.

The 1-chip CPU shown here is μPD7508
µPD7228G can be used as the LCD driver.

4 to 8 show examples of data structures used in the message storage method implemented in the present invention. In the following description, we will explain not only the structure of the storage means for receiving and storing variable length message information, which is a feature of the present invention, but also the protection function for preventing deletion and erasure of arbitrary message information accompanying the present invention. We will also explain.

First, the memory area required for storing, erasing, and protecting message information will be explained. In FIG. 4, Ml to M
i is a message file number storage area that stores the new and old received message information and the corresponding message file number Fi. The initial value is '01' for all data M1 to Mi, indicating that no message file number is stored. Next, when a message signal is received and the message file is assigned number F3, F3 information is set in M1.

Furthermore, when the message file number Fi is assigned, Mi+Mi-1, Mi-1←Mi-2゜...M2
It is shifted and stored as ←Nl, Ml←Fi,
In this way, the number of the latest message file is always stored in Ml. Here, the message file number stored in Ml will be automatically deleted by the above shift.

In FIG. 5, MPI to MPj are message file number storage areas that store the numbers of message files that are not to be deleted among the received message files. To register in this area.

This is performed in the message file protection mode of the operation modes described later. For example, when protecting the message file number F1 stored in Ml in FIG. 4, if you perform a transfer operation of number F1 from area M1 to area MP1, MPI-Fl, MP2-MPI, . . .
It is updated as MP j-MP j-1. Also, it is updated as Ml-M2°Mi-1-Mi, Mi-0.

In FIG. 6(a), FSTATUS is a message file status determination area that stores the usage status of message files, and "0" is stored for each message file when it is not used and "1" is stored when it is used. . Therefore, when allocating a new message file, this register allows you to know which file is empty.

In FIG. 6(b), 5STATUS is a sector status determination area that stores the usage status of sectors that store message information, and, like the FSTATUS area, it is designed to enable you to determine whether each sector is used or not. '1' (used) or 'O' (unused) for each bit
is memorized.

In other words, when storing message information, these 5 STAs
An empty sector is selected based on the TUS information, and message information is stored in the storage area of that sector.

In FIG. 7, Fl to Fn are message file information areas allocated corresponding to the numbers of each message file, and sector numbers constituting one message file are stored in order for each message file. .

In this example, message file F1 is Sl.

S2. It is made up of three sectors S5, and one message information is stored in these sectors.

In FIG. 8, Sl to Sk indicate memory areas allocated corresponding to each sector number, and message information is stored in these areas. In this example.

A case is shown in which the number of characters that can be stored in one sector is 10. Within this sector, message information is stored sequentially. That is, the message file numbered F1 is S1, S2. Consists of S5 sectors,
The message information is 'PLEASE Go To
It can be seen that the message is "THE HO, MRA *". Here, the "*" code is an example of the end code of the message, and when it is visually displayed, it is known from this code that the message has ended.

According to the message storage method of the present invention described above, the message file is protected by transferring the file number from the message file number storage areas M1 to Mi in FIG. 4 to the MPI of the message file number storage area in FIG. Transfer and each M1 to Mi, MPI to MPj
It is executed only by updating.

Also, message files can be deleted from areas M1 to Mi.
Or delete file numbers from areas MPI to MPj F
Resetting the corresponding bit in the STATUS area and 5S
This can be executed by resetting the bit corresponding to the used sector number in the TATUS area.

FIG. 9 is a schematic diagram of the program configuration within the one-chip CPU 21 used in the present invention. The main flow is executed after the power is turned on. In step 101, the control registers etc. are initialized, and in step 102, the RAM 22 (third
Check the operation (see figure) and the internal program data to confirm that there are no abnormalities. In step 103, the presence or absence of a processing request from each interrupt is checked, and if there is no processing request, the process waits in a standby state. On the other hand, if there is a request, steps 104 to 108 are executed according to the request, and then the process returns to step 103.

Next, an outline of each process in steps 104 to 108 will be explained.

In step 104, first, the presence or absence of empty files and empty sectors is checked, and if there are none, "Memory Full" is displayed and notified. On the other hand, if there is, the received message information is displayed, a sound signal is sent out, and a timer is activated.

In step 105, the results of the self-diagnosis performed in step 102 are displayed. After this, all dots are displayed and a display for confirming Talostalk is performed, and it is possible to confirm whether the LCD 9 is mounted in the correct position.

Step 106 is to stop the sound signal in response to a change in the RT switch 10, update the diagnostic display, activate the operation mode, and perform various processes within the operation mode.

For example, it executes message file deletion, protection, external output of message information, memory backup processing, etc. In addition, the switches SW1 to SW3 performed in step 108
It also starts the monitoring process.

In step 107, the time is monitored for automatic stopping and updating of various displays and reception of switches SWI to SW3.

In step 108, the inputs of switches SW1 to SW3 are monitored, and the display is updated according to the internal state and each switch input.
Updates the operation mode and stops the display.

Next, the CLO (Tarlock Out) interrupt flow will be explained. This interrupt flow is activated at the rising edge of the CLO signal, and in step 201 it is determined whether the message signal starts or continues.

Performs initial settings of various control flags FLG, counters, etc. necessary for receiving message signals. In step 202, the message signal is received bit by bit, the counter is updated, and one message signal is received. after that,
Error correction is performed, and the presence or absence of a message signal is determined using the most significant bit MSB.

If it is a message signal, the message information is stored in a message file in a message storage flow described later.

On the other hand, if it is not a message signal.

It is determined that the message signal has ended, and the message end signal MEND is used to notify the decoder 4, and at the same time, a request to start step 104 is made.

The RTS interrupt processing is started at the rising edge of the RTS signal, and since a change has occurred in the RT switch 10, step 106 is started.
A startup request is made in step 301.

Finally, the timer interrupt process uses the 2 kHz signal TCL as the original clock and starts when the count number set by the internal timer is reached. In step 401, a processing request in step 107 is made to notify this fact.

FIG. 10 shows a state transition diagram of various displays in this embodiment. Further, the general functions of various operation modes will be explained below.

1. Message file protection mode (PF) activation condition: Detection of depression of switch SW1 in message file access mode (AM).

General function: Changes the attributes of the specified message file and moves it from the current file to a permanent file.

2. Message file deletion mode (DL) activation conditions・
...Due to detection of depression of switch SW2 in message file access mode (AM).

General function: Delete the registration of the file specified in the current permanent file.

3. Message file - mass erasing mode (CM) activation condition: Based on detection of depression of switch SW3 in message file access mode (AM).

General function: Delete files all at once using various combinations of current and permanent files.

4. Readout display mode (RO) Activation condition: Based on detection of depression of the RT switch 10 in the mode selection mode. or message display mode (
DM) by detecting that the switch SW1 is pressed down.

General function: Reads and displays stored message files.

5. Free area display mode (FA) Activation condition: Detection of depression of switch SW2 in message display mode (DM).

General function: Displays the number of unused files in the current permanent file and the number of remaining characters in memory.

6. Message number display mode (NF) Activation condition: Detection of depression of switch SW3 in message display mode (DM).

General function: Displays the number of files registered and stored in the current permanent file.

7. Scroll operation setting mode (SM) activation conditions...
This is based on detection of depression of the switch SW1 in the operation setting mode (CT).

General functions: Switches the scrolling operation between automatic and manual in the readout display, and when automatic, sets the scrolling time.

8. Message output mode (OP) Activation condition: Based on detection of depression of switch SW2 in operation setting mode (CT).

General function: Transfers specified message file data via serial port.

9. Message backup mode (BM) activation setting mode (CT) by detection of depression of switch SW3.

General function: Performs memory backup requests and initial settings of file management information after recovery.

Figure 1 shows mode selection to specify each operation mode.

Display examples of operation setting mode (CT), message file access mode (AM), and message display mode (DM) are shown. The switch RT is used to display a mode selection, and the switches SWI to SW3 are used to display accessible operation modes, thereby making the switch operation easier.

To explain an example of the operation, switch RT causes Ti11
As shown in Figure (b), a mode selection display is performed, and if the switch SWI is operated here, the message display mode DM is entered. Next, when the switch SW3 is operated in 2, for example in FIG. 11(e), the message number display mode NF
The number of messages will be displayed. It goes without saying that each of the above names is given to the receiver itself in the list.

FIG. 12 shows an example of the flow of storing message data into a message file during message data reception in step 202 explained in FIG.

In step 501, the signal DATA is fetched bit by bit, sequentially stored in the received data RDATA area of the internal memory, and counted to receive a 32-bit signal, and the process proceeds to step 502.

In step 502, it is determined whether the signal received in step 501 is a message signal or a selective call signal based on the logic of the most significant bit MSB, as explained in connection with the code structure in FIG. In other words.

If it is a message signal, the process proceeds to step 503; otherwise, the process proceeds to step 513.

In step 503, a new/continued determination is made.

Determine whether or not to perform the message file storage procedure. In the case of continuation, the storage procedure is not executed and the process advances to step 507. On the other hand, if it is new, go to step 504.

In step 504, it is checked whether the message file number allocation number IFN and the sector number allocation number ISN for storing message information are not 0. If they are 0, it is an empty file.

This indicates that there are no empty sectors, and in this case, the message data reception operation ends. On the other hand, if it is not "0", the FST that stores the file usage status in step 505
Set the bit corresponding to the allocation number IFN in the ATSUS area (Figure 6(a)) to ``12'', and set the bit corresponding to the allocation number IsN in the 5STATUS area (Figure 6(b) to ``11'' for storing sector usage status). Set "1" to the sector SC area that stores the number of used sectors.
Furthermore, in the message file information area Fl (FIG. 7) showing the sector configuration of the message file, sector numbers ISN are stored in positions corresponding to the number of sectors SC, and the process proceeds to step 506.

In step 506, an address proportional to the sector number ISN is set in the store address area 5TAD, which holds the address number for storing message information.

Here, α is proportional to the number of characters that can be stored in one sector. After this, the process advances to step 507.

In step 507, one character is extracted from the received data RDATA area storing the received message signal, and in step 508 it is determined whether it is a character code. If the code is other than the character code, step 51
Proceed to the message data reception termination procedure from 4 onwards. On the other hand, if it is a one-character code, in step 509 area 5T is selected.
It is stored in the message file storage area designated by AD, and at step 510, the address of area 5TAD is updated by adding +1.

Proceed to step 511.

In step 511, the address in area 5TAD is monitored to see if it has moved to another sector. If the border has not been crossed, the process proceeds to step 512, where it is determined whether or not the storage of the one-word message signal has been completed. If the process has not been completed, the process returns to step 507 to repeat character extraction and storage.

On the other hand, if the process is completed, the process returns to step 501 and receives the first message signal. If it is determined in step 511 that the sector has moved to another sector, 1 is added to the sector SC area for storing the number of used sectors in step 518, and it is determined in step 519 whether or not the specified number β has been exceeded.

That is, β is the number of sectors that can be stored in the message file information area shown in FIG. Here, if the specified number β is exceeded, step 5
Proceed to step 15 and complete the termination procedure.

On the other hand, if the specified number β is less than
Search for empty sectors by STATUS area.

If there is, in step 521, the sector number is assigned as the allocation number I.
SN is set, the 5STATUS area is updated, and the sector number is stored in the message file information area.At step 512, area 5TAD is reset, and the process proceeds to step 512.

On the other hand, if there is no empty sector, the oldest file Fn stored in areas M1 to Ni is erased in step 523.
I'll do it at In step 524, the bits of the FSTATUS area corresponding to the file Fn are reset, and in step 525, all the bits of the 5STATUS area corresponding to the sector number used in the file Fn are reset, and the process returns to step 520 to allocate an empty sector. I do.

Step 513 is executed when the received signal is determined to be a selective calling signal in step 520, and here it is determined whether the number of used sectors is one or more. In other words, if there is no message signal, the process directly proceeds to the end. On the other hand, sector SC
If the number of used sectors stored in the area is 1 or more, an end code "*" is written after the message information in step 514, and the message file information is stored in the message file information area Fl corresponding to the number IFN in step 515. Set to .

In step 516, the file number code is set to Ml and sequentially shifted to Mi-+Mi+l, and in step 517, a request to start the report display is issued, and a signal MEND is output to the decoder 4 to notify the end of message data reception. Completes the message data reception operation.

According to the present invention, a plurality of pieces of message information of variable length can be displayed in the memory 2, and the memory is particularly suitable for erasing message information that is no longer needed and for realizing an erasure protection function for message information that is not desired to be erased. Accordingly, it is possible to provide a wireless selective calling receiver with a display that can effectively use the message information storage area.

[Brief explanation of drawings]

1(a) shows the overall signal structure, FIG. 1(b) shows a selective call signal, and FIG. 1(c) shows a message signal. FIG. 2 is a block diagram showing an embodiment of a wireless selective calling receiver with a display function according to the present invention. FIG. 3 is a block diagram of the message processing section 6 in FIG. 2. FIGS. 4-8 are configurations of memory areas according to the invention used for storing message information. FIG. 9 is a diagram showing the program configuration within the chip CPU 21 used in the present invention. FIG. 10 is a state transition diagram showing changes in various displays of the receiver of the present invention. FIG. 11 shows an example of the display displayed on the display when selecting various operation modes realized by the receiver of the present invention. FIG. 12 is a flowchart illustrating a method of storing message information according to the present invention. 1... Antenna, 2... Radio section, 3... Waveform shaping circuit. 4... Decoder, 6... Message processing unit, 7...
・Amplifier, 8...Speaker, 14...External output terminal, 15...Resonator, 21...1 chip CPU0 Fig. 4 Fig. 5 Fig. 11

Claims (1)

[Claims] 1) A wireless selective calling receiver with a display function that receives a selective calling signal and a message signal that follows it, stores and displays message information obtained by decoding the message signal, and has a predetermined storage capacity. a first storage means having a first storage means; a first control means for randomly storing one or more kinds of message information in the first storage means; and a storage area of the first storage means in which the message information is stored. a second storage means that stores a sector number in correspondence with each message information; a third storage means that stores a file number representing the order of arrival in correspondence with each message information; and each of the first storage means. A fourth storage device that stores information for determining whether or not the sector is used in accordance with the sector number.
A wireless selective calling receiver with a display function, comprising: a storage means; and a fifth storage means that corresponds to each file number of the second storage means and stores discrimination information as to whether or not the file is being used.