JP2738187B2 - Wireless selective call receiver with display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio selective call receiver with a display, and more particularly, to a radio selective call receiver with a display for automatically protecting the time limit of a specific message signal.

[0002]

2. Description of the Related Art A radio selective paging receiver with a display in a general radio selective paging system transmits a radio frequency signal obtained by modulating a carrier wave with a digital selective paging signal including a paging number signal and a message signal via an antenna to a radio section (RF). Part)
To receive. The radio frequency signal is frequency-converted into an intermediate frequency signal by the RF unit, and the intermediate frequency signal is further demodulated by the demodulation unit into the digital selective calling signal.
The selected calling signal is decoded by a decoder into a calling signal including a calling number signal and a message signal. CPU
Is a main component, and performs selective reception control in response to this calling signal. That is, the control means determines whether or not the call number signal matches the own call number stored in the ROM in advance, and when both match, reports the sound, vibration, etc. by the notification means such as a speaker. A message is displayed by the operation and / or the message display means to notify the person who carries the radio selective call receiver that there is a call.

When the call number signal matches the call number of the receiver, the control means of the receiver stores a message signal included in the call signal in a message signal storage area of a built-in memory capable of storing a plurality of message signals. .
Then, at the time of receiving the message signal and at the time of a request by a switch operation of the receiver carrier, a message corresponding to these stored message signals is displayed on the message display means. A message signal protection means for preventing a message signal more important than the message signal from being pushed out of the message signal storage area by a message signal received later in time and being deleted, and an unnecessary message signal. Message signal erasing means for erasing from the message signal storage area. Conventionally, these message display, message signal protection and message signal erasing operations have been activated by a switch operation by a receiver carrier. Moreover, the number of message signals that can be protected is limited.

[0004] In the above-mentioned radio selective call receiver with display, if the receiver carrier forgets to delete an unnecessary message (message signal) after the promised time, for example, a message about the promised time, the receiver carries this message. Unnecessary message signals continue to occupy the message signal storage area. As a result, the area for storing other message signals is reduced, and the effective use of the message signal storage area is hindered.

In the above receiver, message signals are protected and erased by operating a switch. Therefore, when the receiver is placed in a bag, the protection and / or erase switch is moved by moving the receiver in the bag. May be performed by mistake. As a result, protection and / or deletion of the message signal is performed against the will of the receiver carrier.

As described above, in the above-mentioned receiver, since the message signal is protected or erased only by operating the switch, there is a problem in the effective use of the message signal storage area and the reliability of the message signal protection / erasure.

[0007]

Accordingly, the first aspect of the present invention is as follows.
An object of the present invention is to provide a radio selective call receiver with a display for automatically protecting and erasing a specified message signal.

A second object of the present invention is to provide a radio selective call receiver with a display for performing highly reliable message signal protection and erasure.

A third object of the present invention is to provide a radio selective call receiver with a display which eliminates the trouble of protecting and erasing message signals.

A fourth object of the present invention is to provide a radio selective call receiver with a display capable of improving the efficiency of storing useful message signals in a message signal storage area.

[0011]

According to the present invention, there is provided a radio selective call receiver with a display, similar to this type of prior art receiver, a radio section, a demodulation section, a decoder section, and a ROM.
And a notification unit, a message display unit, and a control unit including a message signal storage area capable of storing a plurality of message signals. A display switch for instructing the message display means to display a message corresponding to the stored message signal; protection for preventing an important message signal from being pushed out of the message signal storage area by a subsequent message signal and automatically deleted; A switch and an erasing switch for erasing unnecessary message signals from the area.

The radio selective call receiver with display according to the present invention is characterized in that it has a function of automatically protecting and erasing a message signal designated from among the above-mentioned message signals. That is, the control means of the receiver first detects, from the stored message signal, protection information requesting automatic protection of this signal. The protection information includes a protection time signal that determines the length of time for which protection of the stored message signal is continued, and a set of specific symbols arranged before and after the protection time signal. Upon detecting the specific symbol, the control means starts time checking by the time measuring means and protects the stored message signal having the protection information over the protection time measured by referring to the time measured by the time measuring means. Then, when the protection time has passed, the protection of the message signal is automatically released. Until the protection time elapses, the user of the receiver can display a message corresponding to the stored message signal on the message display means by operating the display switch. When the protection time elapses, the stored message signal containing the protection information is automatically converted to an unprotected message signal.

Further, the control means determines the type of the set of specific symbols, and causes the display of the stored message signal in a format corresponding to the type. That is, the control means displays a message corresponding to the stored message signal excluding the specific signal when determining the first type of the specific symbol, and includes the specific signal when determining the second type of the specific symbol. A message corresponding to all the stored message signals is displayed. Further, after the protection is released, the control means converts the stored message signal into a message signal obtained by removing the protection information from the signal in response to the detection of the first type of the specific symbol, and In response to the type detection, the stored message signal is converted into a message signal obtained by removing only the specific symbol from the signal.

The type of the specific symbol is identified by representing the specific symbol with a different character.
Alternatively, it is performed by representing the same character with a different number of characters.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

Referring to the block diagram of FIG. 1, a radio selective call receiver with a display according to the present invention transmits, via an antenna 1, a radio frequency signal S1 obtained by modulating a carrier with a selective call signal including a call number signal and a message signal. To the radio unit (RF unit) 2. This radio frequency signal S1 is RF
The frequency is converted into an intermediate frequency signal S2 by the unit 2, and the intermediate frequency signal S2 is further demodulated by the demodulation unit 3 into the selective calling signal S3. The selected call signal S3 is decoded by the decoder unit 4 into a call signal S4 including a call number signal and a message signal. The control unit 6 having the control circuit 61 as a main component performs selective reception control in response to the calling signal S4. That is, the control circuit 61 first determines whether or not the call number signal matches its own call number stored in the ROM 5 in advance. If they match, the control circuit 61 sends out a first sound signal S8. The first sound signal S8 is converted by the amplifier 8 into the second sound signal S8.
Amplified to 9. The speaker 9 outputs the second sound signal S8
Sounds in response to. The control circuit 61 stores the message signal in the call signal S4 in the RAM 62 having a storage area for a plurality of message signals simultaneously with the transmission of the first sound signal. On the other hand, the control circuit 61 sends a display control signal S10 corresponding to the stored message signal to the display unit 10, and the display unit 10 displays a message in response to the display control signal S10. In this way, the radio selective calling receiver notifies the person who carries the receiver of a call by sounding and displaying a message.

In this radio selective call receiver with display, when the receiver carrier turns on the display switch SW1 at a desired time, the stored message signal is displayed (message display function). The stored message signal is sequentially pushed out of the RAM 62 and erased according to the message signal received later, but the important message signal is turned on by the receiver carrier by turning on the protection switch SW2.
Protected by operation and prevented from being erased unintentionally (message signal protection function). Unnecessary message signals can be erased by turning on the erase switch SW3 (message signal erase function).

Further, in this radio selective call receiver with display, a timer 7 for measuring time information, particularly the elapsed time from the reception of the message signal, is connected to the control circuit 61. As will be described later, the timer 7 provides a main feature of the radio selective call receiver with display, that is, time information which is a basis for an automatic protection and release of a message signal including information to be protected.

Next, referring to FIG. 1 and the signal format diagram of FIG. 2, the RF section 2 of the radio selective call receiver with a display has a POCSAG (Post Office Stan).
d-ardization Advisory Gro
(up) digital paging signal (radio frequency signal S1). This radio frequency signal S1 is composed of a prefix signal P and a plurality of batches following it. Each batch of the signal S1 is composed of a frame synchronization signal F of one frame arranged at the head, a call number signal A or a message signal M composed of eight frames following the frame synchronization signal F. Radio unit 2, demodulation unit 3 and decoder unit 4
Receives, demodulates, and decodes each successive batch of the radio frequency signal S1 in one frame assigned to its own receiver, and generates a paging signal S4 composed of the paging number signal A and the following message signal M. I do. Here, the message signal M of each batch is composed of five characters C
(Alphabet, numbers and symbols).

One example of the message signal M comprising the character C has three signal formats.
The message signal Md1 in the first format does not include the specific symbol *. Upon receiving this message signal Md1, the control circuit 61 does not automatically protect this message signal Md1. The message signal Md2 in the second format includes a guard time signal aa indicating a guard time of the message signal Md2, and a message signal M which is arranged one before and after the signal aa, and the series of message signals Md2 to be protected. A specific symbol that indicates
(Protection determination signal). Third
The message signal Md3 of the format has protection information including a protection time signal bb and two specific symbols * before and one after the signal bb.

In another example of the message signal M, the message signal Md of the third signal format is used.
3 is replaced by a message signal Md3A. In this message signal Md3A, a specific symbol [different from the specific symbol * used in the third signal format is provided as a protection determination signal, one each before and after the protection time signal bb.

Referring to FIGS. 1 and 2 further referring to the flowchart of FIG. 3 and the diagram schematically showing the storage state of the stored message signal of FIG. 4, one of the message signals M in the radio selective call receiver with display will be described. To explain the automatic protection and protection release operation in one example, when the call number signal included in the call signal S4 matches the own call number stored in the ROM 5 (step 301), the control circuit 61 causes the first The sound signal S8 is sent to the amplifier 8 to make the speaker 9 sound. At the same time, the control circuit 61
Converts the message signal M contained in the call signal S4 to R
It is stored in an AM (message signal storage area) 62 (step 302). Next, the control circuit 61 detects whether or not the stored message signal M includes the specific signal * (step 303). When the message signal M is Md1, the signal Md1 is a specific symbol *
Is not included, the control circuit 61 sends out the display control signal S10 to display a message corresponding to the message signal Md1 on the display unit 10 (step 304).
The protection of d1 is automatically released (step 313). The message signal Md1 is stored in the RAM 62 as the message signal No. of FIG. Only the character C is stored as in M01. The message signal Md1 is not automatically protected, and can be protected by turning on the protection switch SW2 and erased by turning on the erase switch SW3. The message signal Md1 for which protection is not performed is the same as the message signal No. Are pushed out of the RAM 62 in the descending order and are naturally erased (in FIG. 4, the protected message signal N
o. M16, the message signal M is not erased, and the message signal No. M15 and M14 are erased in this order).

On the other hand, when the stored message signal M is Md
2 and Md3, the signals Md1 and Md3
Since both 2 include the specific signal * (step 303), the control circuit 62 starts the timer 7 with the control signal S7a, and reads the time information measured by the timer 7 with the control signal S7b (step 305). Then, the number of the specific symbol * appearing at the beginning of the message signal Md2 is counted (step 306).

Since the message signal Md2 includes only one initial specific signal *, the control circuit 61 determines the character C obtained by removing the protection information * aa * from the message signal Md2.
Is displayed on the display unit 10 and the message signal Md2 stored in the RAM 62 is automatically protected (step 307). The message signal No. shown in FIG. Like M02, all characters of the message signal Md2 are stored. Next, the control circuit 61
Is the automatically protected stored message signal Md2
The protection time aa is compared with the time information obtained from the timer 7 until the time information matches (step 308). When the two times match and the elapse of the protection time is detected, the control circuit 61 erases the protection information * aa * from the message signal Md2 stored in the RAM 62 (step 309). As a result, the stored message signal Md2 is stored in the RAM 62 as the message signal No. of FIG. Only the character C is stored as in M014, and the automatic protection is released in step 313. Note that even when a message display is requested by turning on the display switch SW1 within the protection time, the control circuit 61 instructs display corresponding to only the character C.

On the other hand, the message signal Md3 contains two consecutive first specified signals * (step 30).
6) The control circuit 61 causes the display unit 10 to display the protection time signal bb and the character C excluding the three specific symbols * from the message signal Md3, and to display the RAM 6
2 is automatically protected (step 310). The message signal No. shown in FIG. Message signal Md as in M03
3 are stored. Next, the control circuit 62 checks the protection time bb as in the case of the message signal Md2 (step 311). When the protection time bb elapses, three specific symbols * are erased from the message signal Md3 stored in the RAM 62, and the signal M
d3 in FIG. It is changed as in M15 (step 312). As a result, the protection time signal bb of the message signal Md3 has the same meaning as the other characters C, and the automatic protection of the stored message signal Md3 is released (step S313).

The message signals Md2 and Md3
When A is the protection signal format of the message signal M, the stored message signal is the same as that described above, except that in step 306 in FIG. M can be automatically protected and erased.

[0027]

As described above, according to the present invention, the control section of the radio selective receiver with display determines the protection time and identification of the message signal stored in the message signal storage area of the built-in RAM. By detecting the protection information including the symbol, a message excluding the protection information or including the protection information can be displayed on the display unit. The control unit protects the stored message signal for the protection time, and releases the protection when the protection time elapses. This makes it possible to automatically delete a useful message signal from the storage area only after the protection time elapses after the protection time elapses. The area can be effectively used. On the other hand, the stored message signal including the protection information is forcibly protected until the protection time elapses, so that this signal is not erased from the storage area against the will of the receiver carrier. Furthermore, there is an effect that the troublesome operation of protecting and erasing a message signal that is useful only for a limited protection time by performing a switch operation is released.

[Brief description of the drawings]

FIG. 1 is a block diagram of a wireless selection receiver with a display according to an embodiment of the present invention.

FIG. 2 is a signal format diagram of a radio frequency signal received by the radio selection receiver with display of FIG. 1 and a calling signal which is a decoded output of a decoder unit.

FIG. 3 is a flowchart for explaining message signal processing and message display operation of the wireless selection receiver with display of FIG. 1;

FIG. 4 is a diagram schematically showing a state in which a stored message signal is stored in a RAM included in a control unit of the receiver in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Antenna 2 Radio part (RF part) 3 Demodulation part 4 Decoder part 5 ROM 6 Control part 7 Timer 8 Amplifier 9 Speaker 10 Display part 61 Control circuit 62 RAM SW1-SW3 Switch

Claims (14)

(57) [Claims] 1. A receiving means for demodulating a selective call signal from a radio frequency signal received via an antenna, and a decoder means for generating a call signal including a call number signal and a message signal in response to the selective call signal; ROM means for preliminarily storing its own calling number, notifying means for notifying in response to a notifying signal, display means for displaying a message in response to a message control signal, and calling in response to the calling signal Control means for transmitting the notification signal when the number signal matches the calling number of the self, storing the message signal in a message signal storage area, and transmitting the message control signal corresponding to the stored message signal; In the radio selective call receiver with display comprising: the control means sets a time for which the protection of the message signal should be continued. Protection information detection means for detecting, from the stored message signal, protection information including a protection time signal and a set of specific symbols arranged before and after the protection time signal; and the protection time elapses in response to the protection information. until a message signal protecting means for protecting the storage message signal, the protection information detecting means for determining the type of the specific symbol
Specific symbol discriminating means, and wherein the control means determines by the specific symbol discriminating means.
Message display corresponding to the type of the specific symbol separated
Sending out the message control signal giving the
Radio paging receiver with a display, characterized by. 2. The method according to claim 1, wherein the specific symbol discriminating means includes: a first specific symbol type in which the same character is arranged one before and after the protection time signal; and two characters before the protection time signal. After one
Display with radio paging receiver according to claim 1, characterized in that to determine the type of the second specific symbol and pieces placed. 3. A method according to claim 1, wherein said specific symbol discriminating means arranges the same character one by one before and after said guard time signal.
Of the type of the specific symbol, claim 1 with display radio, wherein the determining the type of the second specific symbol is arranged one by one before and after the different character the protection time signal from said character Selective call receiver. 4. The message indication within the guard time corresponding to the first type of the identified specific symbol is determined according to the message control signal corresponding to the message signal excluding the specific symbol. second type corresponding to the message display in the protection time of a particular symbol claim 1 with display radio pager as claimed, characterized in that according to the message control signals corresponding to all of the message signal. 5. The storage message signal corresponding to the first type of the identified specific symbol is erased from the protection information after the elapse of the protection time, and the second type of the identified specific symbol is deleted. 5. The radio selective call receiver with a display according to claim 4 , wherein only the specific symbol is deleted from the stored message signal corresponding to. 6. The display of a message within the guard time corresponding to the first type of the determined specific symbol is performed according to the message control signal corresponding to the message signal excluding the specific symbol. 3. The radio selective call receiver with display according to claim 2 , wherein a message display within the guard time corresponding to the second type of the specific symbol is in accordance with the message control signal corresponding to all of the message signals. 7. The storage message signal corresponding to the first type of the identified specific symbol is erased from the protection information after the lapse of the protection time, and the second type of the identified specific symbol is deleted. 7. The radio selective call receiver with a display according to claim 6 , wherein only the specific symbol is deleted from the stored message signal corresponding to. 8. A receiving means for demodulating a selective call signal from a radio frequency signal received via an antenna, a decoder means for generating a call signal including a call number signal and a message signal in response to the selective call signal, ROM means for preliminarily storing its own calling number, notifying means for notifying in response to a notifying signal, display means for displaying a message in response to a message control signal, and calling in response to the calling signal Control means for transmitting the notification signal when the number signal matches the calling number of the self, storing the message signal in a message signal storage area, and transmitting the message control signal corresponding to the stored message signal; In the radio selective call receiver with display, comprising: a time when the control means should continue to protect the message signal. A protection information detection unit for detecting, from the stored message signal, protection information including a protection time signal and a set of specific symbols arranged before and after the protection time signal, and receiving the message signal in response to the protection information. Time measuring means for measuring an elapsed time as a starting point, and time comparing means for reading the protection time from the stored message signal in response to the protection information, and comparing the protection time with the measurement time of the time measurement means. A message protection means for protecting the stored message signal within the protection time in response to the comparison result; and a message protection release for releasing the protection of the stored message signal after the protection time elapses in response to the comparison result. Means, and the specific symbol determined from the stored message signal.
Specific symbol determining means for determining the type, and a message table corresponding to the type of the determined specific symbol
And transmitting the message control signal for giving an indication. 9. The specific symbol discriminating means includes: a first specific symbol type in which the same character is arranged one before and after the guard time signal; and two characters before the guard time signal. After one
The radio selective call receiver with a display according to claim 8, wherein the type of the second specific symbol arranged is determined. 10. The type of the first specific symbol in which the same character is arranged one before and after the guard time signal, and the character different from the character before and after the guard time signal. The radio selective call receiver with a display according to claim 8, wherein a type of the second specific symbol arranged one by one is determined. 11. The message display corresponding to the first type of the identified specific symbol is performed according to the message control signal corresponding to the message signal excluding the specific symbol. 9. The radio selective call receiver with a display according to claim 8 , wherein the message display corresponding to the type of the message follows the message control signal corresponding to all of the message signals. 12. After the protection time has elapsed, the stored message signal corresponding to the first type of the identified specific symbol has the protection information erased, and the second type of the identified specific symbol is deleted. The radio selective call receiver with a display according to claim 11 , wherein only the specific symbol is deleted from the stored message signal corresponding to (i). 13. The message display corresponding to the first type of the identified specific symbol is performed according to the message control signal corresponding to the message signal excluding the specific symbol. 10. The radio selective call receiver with a display according to claim 9 , wherein the message display corresponding to the type of the message is in accordance with the message control signal corresponding to all of the message signals. 14. After the elapse of the protection time, the stored message signal corresponding to the first type of the identified specific symbol has the protection information erased, and the second type of the identified specific symbol is deleted. 14. The radio selective call receiver with a display according to claim 13 , wherein only the specific symbol is deleted from the stored message signal corresponding to.