JPH0426254B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a selective call radio receiver with a display device applied to an individual selective call radio communication system.

〔overview〕

The present invention provides a selective call radio receiver with a display having a storage means for storing message signals, which interrupts reception of the message signal when there is no free storage space in the storage means and displays this to the user. This makes it possible to retain the message already stored in the storage means and to prompt the user to take action.

[Conventional technology]

In recent years, wireless selective calling receivers have added message information to the selective calling signal and displayed the message information on the receiver's display (hereinafter referred to as "calling display"), in addition to providing a calling service with only a notification tone based on the selective calling signal. ), services for transmitting messages are becoming widespread. In addition, there are two modes: a normal mode (hereinafter referred to as "normal mode") in which a call alarm is issued and displayed at the same time as the signal is received by the user's switch operation, and a normal mode (hereinafter referred to as "normal mode") in which the alarm is not issued at the time the signal is received and the message information is displayed. Receivers have also been put into practical use that can be switched to a mode (hereinafter referred to as "memory mode") in which a call alarm and a message are displayed once stored, and then later switched to the normal mode. By using such a memory mode, sudden ringing can be avoided, for example during a meeting. Such a radio selective call receiver with a display device has a memory circuit for storing a plurality of pieces of received message information, and this is essential especially when it has a memory mode.

However, the storage capacity of this memory circuit is finite, and especially in devices such as this type of portable receiver where miniaturization and power saving are important factors, it is important to use as little storage space as possible. For example, if a new call is received when all the storage area is used, the oldest message information is automatically deleted. In addition, devices that protect particularly important information from being automatically deleted as described above, and that have a means to forcibly delete information that is no longer needed, are also being put into practical use. .

[Problem that the invention seeks to solve]

Even with this method of effectively utilizing storage space, if the received messages are relatively long, many messages are protected.
When there is substantially less storage space available for newly received messages, and when memory
When in the mode, a large number of calls are received and the storage area is used, and the storage area for new calls is running low, so the storage area for the message information being received may run out midway through.

As described above, when the storage area becomes insufficient while receiving message information, the present invention aborts the reception of the signal and notifies the user to that effect, so that the small storage area can be used as effectively as possible. To provide a selective calling radio receiver with an indicator that notifies a user of complete but only part of new message information and at the same time notifies the user that the message has been received in an incomplete format due to lack of storage space. The purpose is to

[Means for solving problems]

The present invention is a selective calling radio receiver with a display device equipped with a storage means for storing an incoming message signal for display, and as a means for solving the above-mentioned problems, the message signal is stored in the storage means. determining means for determining whether or not there is free space for the message to be received; and control means for generating a control signal for interrupting reception of the message signal that is being received based on the determination of the determining means is negative; The present invention is characterized by comprising display means for displaying that reception has been interrupted based on the control signal generated by the control means.

Further, the display means may include means for generating a signal in which a specific signal is added to the end of the message signal whose reception has been interrupted, and display means for displaying the signal generated by this means. .

The display means may include means for generating a signal in which the last character of the message signal whose reception has been interrupted is replaced with a specific symbol, and a display means for displaying the signal generated by this means. good.

[Effect]

In a selective call radio receiver with a display, message information is displayed on the display in addition to a notification tone service based on a selective call signal. Usually, a plurality of pieces of this message information are temporarily stored in the storage means.

In the present invention, when a new call is received and there is no free space in the storage area of the storage means, the reception of this signal is terminated without erasing part of the message information, and the reception of this signal is terminated. The user will be notified.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be explained based on the drawings.

FIG. 1 is a block configuration diagram showing the configuration of an apparatus according to an embodiment of the present invention. FIG. 2 is a format diagram showing the structure of an information-added selective call signal applied to the apparatus of this embodiment. FIG. 3 is a block configuration diagram showing the configuration of the decoder 4 used in this embodiment. Figure 4 shows the CPU used in this example device.
This is a block configuration showing the configuration of No. 9. Figure 5 is
3 is a map diagram showing memory areas of RAM9-22 and RAM10. FIG. FIG. 6 is a flowchart showing the operation of the decoder 4 used in this embodiment. Figure 7 is used in this embodiment device.
8 is a flowchart showing the operation of the CPU 9, FIG. 8 is a flowchart showing the call display operation in the flowchart shown in FIG. 7, and FIG. 9 is an empty area in the flowchart shown in FIG. 7. FIG. 10 is a flowchart showing the file search operation in the flowchart shown in FIG. 9, and FIG. 11 is a flowchart showing the sector search operation in the flowchart shown in FIG. This is a flowchart.

First, the configuration of this embodiment device will be explained based on FIG. This embodiment device includes an antenna 1, a radio unit 2, a waveform shaping circuit 3, a decoder 4, an oscillation element 5, a programmable read-only memory (hereinafter referred to as P-ROM) 6, an amplifier 7, Speaker 8, CPU 9, RAM 10, LCD driver 11, LCD 12, and reset switch 1
3 and function setting switches 14 to 16.

The antenna 1 is connected to the input of a radio section 2, and the output of the radio section 2 is connected to the input of a waveform shaping circuit 3.
The output of the waveform shaping circuit 3 is connected to a first input of a decoder 4. The second input and output of the decoder 4 is P-
It is connected to the input/output of the ROM 6 so as to send and receive signals, and the third input/output of the decoder 4 is connected to the first input/output of the CPU 9 so as to send and receive signals. Reset switch 13 is inserted between the fourth terminal of decoder 4 and the common potential, and oscillation element 5 is inserted between the fifth and sixth terminals. The seventh output of the decoder is connected to the input of an amplifier 7, and the output of the amplifier 7 is connected to the input of a speaker 8.
The second input/output of the CPU 9 is connected to the input/output of the RAM 10 to exchange signals, and the third output of the CPU 9 is connected to the input of the LCD driver 11.
Function setting switches 14 to 16 are inserted between each of the fourth to sixth terminals of the CPU 9 and a common potential. The output of LCD driver 11 is LCD12
connected to the input of

Next, an outline of the operation of each part of this embodiment device will be explained based on FIG. 1.

A radio signal received by the antenna 1 is amplified and demodulated by the radio section 2. This demodulated signal is converted by a waveform shaping circuit 3 into a waveform that can be read by a decoder 4. The decoder 4 compares the calling number of its own device, which is written in advance in the P-ROM 6, with the signal from the waveform shaping circuit 3, and when the two numbers match, it is detected that a call has been made.
Based on this, the CPU 9 is activated and a message signal following the calling number is sent to the CPU 9. CPU
At step 9, the message signal from the decoder 4 is decoded and stored in an empty area of the message storage section in the RAM 10. When the CPU 9 determines that the message signal has ended, a signal transmission stop command is sent to the decoder 4.
At the same time, the LCD 12 is driven via the LCD driver 11, and visible information of the message is provided to the person carrying the receiver. On the other hand, in the decoder 4, based on the signal transmission stop command from the CPU 9, a sound signal is transmitted to the amplifier 7, and the speaker 8 is driven. In the oscillation element 5, the decoder 4
A timing clock is generated to operate the circuit.
The reset switch 13 resets the sound and display, and also switches between the normal mode and memory mode. Function setting switch 14
- 17, rereading, erasing, and protecting message data are performed by these combined operations.

Next, the structure of the selective call signal with message information applied to the apparatus of the embodiment will be explained based on FIG. In a of the figure, P is a preamble signal, F is a frame synchronization signal (SC signal),
N indicates a selective call signal and I indicates a message signal. A plurality of message signals I are arranged according to the length of the message. b and c in the figure show the selective call signal N and the message signal, respectively. The total is 32 bits, of which the first 31 bits are
BCH code (Bose−Chaudhuri−Hocquenghem
Configure the code. This signal consists of 21 information bits and 10 check bits.
The first bit of the information bits is used to distinguish between a selective call signal and a message signal. moreover,
The last 32nd bit is a parity bit generated by bits 1 to 31.

Next, the decoder 4 used in this embodiment device
The operation will be explained based on FIG. When the readable signal output of the decoder 4 is provided from the waveform shaping circuit 3, this signal is sent to the SC detection circuit 4-1, the bit synchronization circuit 4-2 and the coincidence circuit 4-3. Frame synchronization is established in the SC detection circuit 4-1, and then bit synchronization is established in the bit synchronization circuit 4-2. According to these synchronization signals, P-
From ROM reading/decoding circuit 4-4, P-ROM6
A read pulse is sent to P-ROM6.
The selective call number pre-written in the fax machine is decoded. This selective call number is compared with the received signal in the matching circuit 4-3, and if they match, the message signal received following the selective call signal is sent to the CPU 9.
will be sent to. The CPU 9 provides a start signal when the power supply beeps and a signal to stop sending the message when the message signal ends.

Next, the configuration of the CPU 9 used in this embodiment device will be explained based on FIGS. 4 and 5.

In FIG. 4, 9-1 to 9-6 are input ports, 9-7 is an interrupt port, 9-8 is a serial interface, and 9-9 to 9-1 are
Reference numeral 5 indicates an output port, and reference numerals 9-16 indicate data buses. Further, reference numeral 9-17 designates a program counter for specifying the contents of an address, and reference numeral 9-18 a program memory in which a sequence of instructions to be executed is stored and from which the contents of the address specified by the program counter 9-17 are read. shows. Reference numeral 9-19 indicates an arithmetic unit that performs various operations such as arithmetic operations and logical operations, and reference numeral 9-20 indicates a program memory 9-18.
A control section is shown that decodes information from and supplies control signals corresponding to the commands to each section. Code 9-21
indicates an accumulator used for transmitting and receiving data between the RAM 9-22 and each port 9-1 to 9-15. Reference numeral 9-22 indicates a RAM used for storing various data, subroutines, program counts in interrupts, and saving program status. Reference numeral 9-23 indicates a clock generation circuit for determining the execution instruction cycle time.

Now, in Figure 5, MP1 to MP4 and M1 to
M8 is an external storage where message information is stored.
File numbers in RAM 10 are stored.
The file numbers of the received message information are normally stored in M1 to M8, with the latest information being stored in M1 and the oldest information in M8. When new information is continuously received, it is erased in the order of M8→M7→... to secure a storage area for this information. If you want to avoid automatic deletion of message information like this, you can delete it from MP1 to MP1 by operating an external switch.
The file number is transferred to MP4 and protected.
Corresponding to MP1 to MP4 and M1 to M8, the external RAM 10 has file areas F1 to F12 and sector areas S1 to S13. is stored, and actual message information is stored in sector areas S1 to S13. MP1～
MP4, M1~M8, F1~F12 and S1~
The received message information is stored in S13.

Here, to explain the case where the content of M1, which is the most recently received message, is referred to, M1
Since the content of is F2, F2 in external RAM10
The contents of are referenced. Here, F2 consists of three sectors, and the sectors are S1, S2 and S4, so the contents of S1, S2 and S4 are referred to and M
The content of 1 is “CALL MR.NAGATA IN NEC
CORP.#045-932-1111".

Also, MP1-MP4, M1-M8, F1-F
12 and all initial values of S1 to S13 are set to 0.
Mxi is a register that indicates whether M1 to M8 have performed a call indication after receiving the message signal, or whether they have not performed a call indication.The initial value is "0", and when a message signal is received, it becomes "1". When this message signal is displayed, it is reset to "0".
That is, in normal mode, an alarm/call display is performed immediately after reception, so M _X is reset to "0" immediately after reception, but in memory mode, normal It remains at "1" until the mode is returned and an alarm/call display is performed. Fxj is a register indicating the free area of the file, and is set to "1" if the file is in use, and "0" if it is free. Sxk also indicates the free area of the sector. IFN is a place where the name of the file currently being written is stored when writing message data, and ISN is a place where the name of the sector currently being written is stored. F1 is the place where the file information currently being written is created, and the number of sectors used to store the message being written is written in the first part (TNSF), and the sector name is written below, indicating that this message will not be written. When finished, each part is transferred to a file area in the RAM 10. AA is a flag for distinguishing whether the first character of the message signal is written or the second and subsequent characters, and SCTC is a counter that counts the total number of characters written to the sector during writing.

Next, the decoder 4 used in this embodiment device
The operation will be explained based on FIG. After the power is turned on (S1), the decoder 4 is initialized (S2).
Turn on the RF circuit (S3) and expect to receive a preamble signal (S4). Here, if the preamble signal is not received, the RF circuit is turned off in step (S13) after the timer α, which monitors the time that the RF circuit is in the on state, ends (S5). Next, after the timer β, which monitors the time that the RF circuit is turned off, ends, the operation of turning the RF circuit on is repeated again in step (S3).This repeated operation is the normal signal waiting. In this state, by intermittent RF circuit, battery life can be effectively extended. Now, in steps (S4) and (S5),
When a preamble signal is received while the RF circuit is in the on state, reception of a subsequent synchronization signal is expected in step (S6). If the synchronization signal is not received, the re-bit RF circuit returns to the intermittent state, but if the synchronization signal is received, word-by-word reception is performed (S7). This received signal is compared with its own selective calling number (S8). As a result, if the received calling number matches the self-selected calling number, the CPU 9 is activated to send a subsequent message signal to the CPU 9 (S9), and the message signal is sent (S10). When the end of the message signal is detected on the CPU 9 side, a signal transmission stop command is sent to the decoder 4 side, thereby stopping the signal transmission (S11). Then, signal reception continues until a predetermined ID signal (a signal indicating that there is no selective call signal after that) is received (S12).

Next, the operation of the CPU 9 used in this embodiment will be explained based on FIGS. 7 to 11.

First, the overall operation will be explained based on FIG.
When a message signal is received, at least one
It is confirmed that two message storage files remain (S101). Here, if the oldest file M8 has not been reported, that is, M _x8 = 1, message reception is stopped (S102), it is reported that the file has overflowed (S103), and the reception operation is ended ( S104). M _x8 = 0
If so, the write control flag AA is reset to "1" (S105), and each word is received (S106). Whether the received signal is a message signal or
If it is not a message signal, reception is stopped at that point (S108).
M _xi is shifted to M _xi+1 , "1" is input to M _x1 , the written files are sorted (S109), a call display is performed (S110), and the receiving operation is ended ( S111). If the received signal is a message signal, it is decoded character by character,
(S112) An empty area for storing them is searched and stored (S113). If there is no empty space (S114), reception is terminated at that point (S115),
In order to notify the user that reception has been interrupted midway, the last written character is replaced with a special character (S116). After that, the above step (S109)
A call display is performed through steps exactly similar to (S111) (S117) to (S119). In addition, if there is an empty area and you search for one character, if it has already been received,
If one character is composed of only one decoded word signal, the process for storing that character is repeated; otherwise, one new word is read (S120).

Next, the call display operations in steps (S110) and (S118) shown in FIG. 7 will be explained based on FIG. 8. First, a judgment is made as to whether or not the sound is being generated (S201). If the sound is being generated, the timer for monitoring the automatic reset of the tone and the reset switch used for manual reset are monitored, and the reset switch used for manual reset is monitored. The sound is stopped by either (S202~
S204), and the display is further stopped by the same procedure (S205 to S207). If there is no message remaining to be sounded or displayed, that is, if the latest data has been displayed (M _x1 =0) (S208), the call display ends (S209). Meanwhile, step S201
If it is determined that the sound is not being sounded, a determination is made as to whether or not the mode is in memory mode (S210), and if it is in memory mode, the call display ends (S211). Step S210
If the judgment in step S208 is negative, the next message to be displayed audibly is detected (S212-S213), _Mxi is reset to 0 (S214), and this _Mxi is A corresponding message is displayed (S215), a sound starts (S216), and the process returns to monitoring the timer and reset switch during the sound.

Next, the empty area search operation corresponding to step (S113) in FIG. 7 will be explained based on FIGS. 9 to 11. Here, when a message signal is received, a file to be stored is first searched, and then as many sectors as necessary depending on the length of the message are searched. First, flag AA is checked to determine whether the file to be stored is secured (S301), and if AA = 0, a file search is performed to secure the file (S302), and then A sector search is performed (S303). On the other hand, if AA = 0, the counter SCTC that counts the number of characters written in the sector is referenced (S304), a judgment is made as to whether or not there is free space left in the sector currently being written, and this sector is A sector search is performed when there is no empty area (S303), and based on whether there is an empty area (S305), the search is terminated (S306) and data is stored (S307). Note that step S304
If it is determined that empty space remains, data storage is directly executed.
(S307). Note that when the data storage is completed, the SCTC is counted up by "1" (S308), and the search is completed (S309).

Next, the file search in step (S302) in FIG. 9 will be explained based on FIG. 10. Here, the file search is a step that is repeated in the sector search described later. First, F _xj is referenced to check whether there is any free space left (S401). If there is an empty area, it is determined whether the file has already been secured by AA (S402), and if it has not been secured, the corresponding F _xj is set to 1 to secure it (S403),
INF is set to F _j (S404), and TNFS is initialized (S405). Subsequently, AA is set to "1" (S406), and all sectors used by file _Fj are released. That is, S _xk is reset to "0" (S407), and the file search ends (S408). If it is determined that AA≠0 (S402), the process directly proceeds to step (S407).
On the other hand, if there are no free files as a result of the search in step (S401), the oldest registered files are deleted in order to secure a new storage area (S409). At that time, register Mxi
It is determined whether the message is an unreported message (S410), and if it is unreported and there is no message that can be deleted, the search is terminated based on the absence of empty space (S411) (S412). . If there is a file M _i that can be deleted, the contents of M _i (M _i ) =
Step F _j ′ (S402) To perform the following processing
It is replaced by F _j , the content M _i is initialized to 000, and the processing of steps (S402) to (S408) is performed.

Next, the signal sector search operation will be explained in FIG. 9 based on FIG. 11. In step (S501), the number of sectors used for the file being written is checked, and it is confirmed that it is less than or equal to a predetermined number. As a result, if TNSF>n, the search ends (S503) based on the fact that there is no empty area (S502). If TNSF≦n, a sector search is performed (S504). If there is an empty sector, it will be used, and S _xk corresponding to the sector to be used will be "1".
and ISN is set to S _k . Also,
TNSF is counted up by “1” and the FI content is
S _k is added (S505). Furthermore, SCTC is “0”
and the search ends (S507). on the other hand,
If there is no empty area (S504), a new file search is performed (S508) and the sector is released. If there is no sector to be released (S509), the search ends (S510).

〔Effect of the invention〕

As explained above, the present invention enables a message signal to be memorized without accidentally erasing a message signal that has already been received and cannot be erased when incomplete reception is required due to insufficient storage capacity. Memorize message signals and due to lack of storage capacity,
Since it is possible to inform the user that reception has been terminated due to incomplete reception, even if the deciphering of incomplete messages is left to the user,
This has the effect of providing useful information to the user.

[Brief explanation of drawings]

FIG. 1 is a block configuration diagram showing the configuration of an apparatus according to an embodiment of the present invention. FIG. 2 is a format diagram showing the structure of signals used in the apparatus according to the embodiment of the present invention. FIG. 3 is a block configuration diagram showing the configuration of a decoder used in the apparatus according to the embodiment of the present invention. FIG. 4 is a block configuration diagram showing the configuration of the CPU used in the apparatus according to the embodiment of the present invention.
FIG. 5 is a map diagram showing the memory area of the RAM used in the device according to the embodiment of the present invention. Figures 6 to 11
The figure is a flowchart showing the operation of each part of the apparatus according to the embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Antenna, 2... Radio section, 3... Waveform shaping circuit, 4... Decoder, 5... Oscillation element, 6...
P-ROM, 7...Amplifier, 8...Speaker, 9
...CPU, 10...RAM, 11...LCD driver, 12...LCD, 13...reset switch,
14, 15, 16...Function setting switch, 4-1
...SC detection circuit, 4-2...Bit synchronization circuit,
4-3... Matching circuit, 4-4... P-ROM reading/decoding circuit, 4-5... Clock generation circuit, 4
-6...Battery saving circuit, 4-7...
Sound signal generation circuit, 9-1 to 9-6...Input port, 9-7...Interrupt port, 9-8...Serial interface, 9-9 to 9-15...Output port, 9- 16...Data bus, 9-17...Program counter, 9-18...Program memory, 9-19...Arithmetic unit, 9-20...Control unit, 9-21...Accumulator, 9-22...
RAM, 9-23...Clock generation circuit.

Claims (1)

[Scope of Claims] 1. In a selective calling radio receiver with a display equipped with a storage means for storing an incoming message signal for display, it is determined whether or not there is a free space in the storage means to store the message signal. a determination means for making a determination; a control means for generating a control signal for interrupting reception of the message signal being received based on a negative determination by the determination means; and a control signal generated by the control means. 1. A selective call radio receiver with a display device, characterized in that it is equipped with a display means for displaying that reception has been interrupted based on the information received. 2. The display means includes means for generating a signal in which a specific signal is added to the end of the message signal whose reception has been interrupted, and display means for displaying the signal generated by this means. A selective calling radio receiver with a display according to item 1. 3. The display means includes means for generating a signal in which the last character of the message signal whose reception has been interrupted is replaced with a specific signal, and a display means for displaying the signal generated by this means. A selective calling radio receiver with an indicator according to scope 1.