JPH1032854A - Radio calling receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio calling receiver which prevents a message from being erased against a user's will and also can effectively utilize a message memory. SOLUTION: This radio calling receiver adds the data of a protective attribute and a protected period to a message which is received by a control part 4 in response to a user's instruction and stores it in message memory 5, and the part 4 periodically browses the memory 5, retrieves a message whose protected period passed and erases the protective attribute of such a message when the message is retrieved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio paging receiver such as a pager, and more particularly to a method for managing messages to prevent important messages from being deleted against the user's will. The present invention relates to a radio paging receiver capable of effectively utilizing a memory area for storing a call.

[0002]

2. Description of the Related Art Some radio pagers have a display device for displaying a message. These paging receivers include a memory (hereinafter, referred to as a “message memory”) for storing a received message.

As this message memory, a memory having a small storage capacity is used in order to reduce the cost of the memory element and the size and weight of the radio paging receiver. The number of messages that can be stored is about 6 to 20. It is.

The radio paging receiver sequentially stores the received messages in a message memory, and when further receiving a message when the capacity becomes full, deletes the message with the oldest reception time and newly receives the message. Store the message in the message memory.

[0005] Therefore, a message that the user does not want to delete will eventually be deleted. Therefore, if attribute data indicating whether or not to protect the message data is added, and the attribute is protected by setting the paging receiver to protect the message that the user does not want to delete, the capacity is reduced. When a further message is received when the message becomes full, the message data indicating that the attribute data is not protected is deleted from the message having the oldest reception time, and the newly received message is stored in the message memory. Features have been devised.

Here, the operation of such a radio pager will be described with reference to FIG. FIG. 5 is an explanatory diagram showing a change in the contents of a message memory in an example of the operation of a conventional paging receiver. The message memory stores a memory number, a message, and an attribute indicating whether or not the message is protected.

In FIG. 5, the message memory can store up to five messages. Initially, messages A to D are stored as shown in FIG. And that the attribute of protection is added. Here, first, when the messages E to G are received, the message memory becomes full when the message E is stored.

Therefore, since message A and message B are messages to which the protection attribute is not added,
These are deleted, and the message F and the message G are newly stored. The contents of the message memory are shown in FIG.
(B).

[0009] When the message H is further received, the oldest message is C, but the message C is not deleted because the protection attribute is added thereto. The next oldest message is D, which also has a protection attribute.

Therefore, the oldest message E is deleted from the messages to which the protection attribute is not added, and the newly received message H is stored. Thus, the data shown in FIG. 5C is stored in the message memory.

[0011]

However, in the above-mentioned conventional paging receiver, the data of the message to which the attribute data of protection is added remains unchanged until the user changes the attribute and does not protect the data. Since the message memory is occupied semipermanently, there is a problem that the message memory cannot be used effectively.

The present invention has been made in view of the above circumstances, and provides a radio pager which can effectively utilize a message memory while preventing a message from being deleted against a user's will. With the goal.

[0013]

According to a first aspect of the present invention, there is provided a radio paging receiver in which a message which needs to be protected among received messages is set. When the protection period ends, the protection setting of the message is released, and the message memory can be effectively used.

According to a second aspect of the present invention, there is provided a radio call receiver, comprising: a protection attribute for setting whether or not a received message is protected from deletion of the message; The message is stored in the message memory together with the protection period to which the protection attribute is added, and the protection setting of the message after the protection period is released is effectively used.

According to a third aspect of the present invention, there is provided a protection attribute for setting whether or not a received message is protected from being deleted, and the protection attribute. Is stored in the message memory together with the protection period in which the attribute is added.If there is a message in which the protection period has elapsed, or there is a message that has passed a predetermined time before the protection period has elapsed. , And the message memory can be used effectively.

According to a fourth aspect of the present invention, there is provided a radio paging receiver, comprising: an operation unit for inputting an instruction; a radio unit for receiving a message; and a display for displaying the message. A message memory for storing a message, and a control unit for receiving an input of the message received by the wireless unit and outputting the message to the display unit, wherein the control unit is configured to perform the operation Upon receiving an instruction to add a protection attribute to the received message from the unit, a protection period and a protection attribute are added to the message and stored in the message memory, and the message memory is scanned and the protection period elapses. When a message is retrieved, the control unit releases the protection setting of the message, and the message memory can be used effectively. .

According to a fifth aspect of the present invention, there is provided a radio call receiver according to the fourth aspect, wherein the control unit cancels the setting of protection of a specific message. The message memory is characterized in that the message memory is deleted from the message memory, and the message memory can be effectively used.

According to a sixth aspect of the present invention, there is provided an operation unit for inputting an instruction, a radio unit for receiving a message, a display unit for displaying a message, and storing the message. A message paging receiver having a message memory and a control unit that receives an input of a message received by the wireless unit and outputs the message to the display unit,
Upon receiving an instruction from the operation unit to add a protection attribute to the received message, the control unit adds a protection period and a protection attribute to the message, stores the message in the message memory, and scans the message memory. When the protection period elapses, or when a message that has passed a point in time that is earlier by a preset time before the protection period elapses is searched, it is notified that the protection period of the message has elapsed. The control unit releases the protection setting of the message in response to the instruction to release the protection setting of the message, so that the message memory can be effectively used.

The invention according to claim 7 for solving the problem of the above-mentioned conventional example is according to claim 4 or 5 or 6.
In the radio paging receiver described above, the protection period is variable for each message, and the message memory can be used effectively.

The invention according to claim 8 for solving the problem of the above-mentioned conventional example is according to claim 4 or 5 or 6.
Alternatively, in the radio paging receiver according to claim 7, the control unit is a control unit that adds a protection period input from an operation unit to a message together with a protection attribute to a message and stores the message in a message memory, The message memory can be used effectively.

According to a ninth aspect of the present invention for solving the above-mentioned problems of the conventional example, there is provided a method as set forth in claim 4 or claim 5 or claim 6.
8. The radio paging receiver according to claim 7, further comprising a non-volatile memory for storing a protection period, wherein the control unit adds the protection period read from the non-volatile memory to a message together with a protection attribute to the message. It is characterized by being a control unit for storing in a memory, and a message memory can be used effectively.

According to a tenth aspect of the present invention, there is provided a radio paging receiver according to the ninth aspect, wherein the nonvolatile memory stores an ID of the radio paging receiver. It is characterized by the fact that it is an ID-ROM to be used, and the message memory can be effectively used.

According to an eleventh aspect of the present invention, there is provided a radio paging receiver according to the fourth or fifth or sixth aspect, wherein the protection period is a fixed period. The feature is that the message memory can be used effectively.

According to a twelfth aspect of the present invention, there is provided an operation unit for inputting an instruction, a radio unit for receiving a message, a display unit for displaying a message, and a message to be protected. A wireless paging receiver having a protected memory for storing a message, an unprotected memory for storing an unprotected message, and a control unit for receiving an input of a message received by the wireless unit and outputting the received message to the display unit,
When receiving the instruction to protect the message received from the operation unit, the control unit stores the message in the protected memory, scans the protected memory, and searches for the message whose protection period has passed. This is characterized in that the control unit moves the message to the unprotected memory, and the message memory can be effectively used.

According to a thirteenth aspect of the present invention, there is provided an operation unit for inputting an instruction, a radio unit for receiving a message, a display unit for displaying a message, and a message to be protected. A wireless paging receiver having a protected memory for storing a message, an unprotected memory for storing an unprotected message, and a control unit for receiving an input of a message received by the wireless unit and outputting the received message to the display unit,
Upon receiving an instruction to protect a message received from the operation unit, the control unit stores the message in the protected memory, scans the protected memory, and the protection period elapses, or the protection period. When a message that has passed a preset time before the expiration of the message is searched for, the fact that the protection period of the message has passed is notified, and an instruction not to protect the message is received, and the message is protected. The feature is that the control unit moves from the memory to the unprotected memory, and the message memory can be effectively used.

According to a fourteenth aspect of the present invention, there is provided a radio paging receiver according to the twelfth or thirteenth aspect, wherein the protection memory is a non-volatile memory. The message memory can be used effectively.

According to a fifteenth aspect of the present invention, there is provided a radio pager according to the fourteenth aspect, wherein the nonvolatile memory is an ID-ROM. The message memory can be used effectively.

The invention according to claim 16 for solving the problem of the above-mentioned conventional example is provided in claim 4 or claim 5 or claim 6 or claim 7 or claim 8 or claim 9 or claim 1.
12. The radio paging receiver according to claim 11, wherein the control unit is a control unit that displays a remaining period of the protection period when displaying the message to which the attribute of protection is added. The message memory can be used effectively.

According to a seventeenth aspect of the present invention for solving the problems of the conventional example, in a wireless paging receiver according to the twelfth or thirteenth aspect, the control unit comprises: When displaying a message stored in the protection memory, the control unit displays the remaining period of the protection period, and the message memory can be used effectively.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to the drawings. The radio paging receiver (first apparatus) according to the first embodiment of the present invention, when adding a protection attribute to a message, sets a period until the attribute is deleted. By deleting the protection attribute after elapse of the time, the message is prevented from being stored in the message memory forever, and the message memory can be used effectively.

The first machine will be described with reference to FIG. FIG.
FIG. 2 is a configuration block diagram of a first main unit. As shown in FIG. 1, the first main unit mainly includes a mode switch (Switch) 1, a select switch 2, a set switch 3, a control unit 4, and a message memory 5. In the claims, a mode SW1, a select SW2, a set SW3
May be referred to as switches, and a set thereof may be referred to as an operation unit.

Originally, in addition to the configuration shown in FIG. 1, the first main unit generally has a receiving unit and a display unit for receiving a message, but the description will be simplified here. Therefore, only the main parts are shown.

In the following, each section will be described in detail. The mode SW1, the select SW2, and the set SW3 are all operated by the user, and the operation is transmitted to the control section 4. The control unit 4 operates the mode SW1, the select SW2, and the set SW3 by operating the user.
In response to the instruction, the message memory 5 is managed. This management process will be described later in detail.

The message memory 5 is a memory similar to the conventional one, but includes information indicating whether the stored message data is to protect the message data, and data indicating a period to be protected. The attribute is different from the conventional one.

Here, the process of managing the message memory 5 of the control unit 4 will be described with reference to FIG. FIG. 2 is a flowchart illustrating a process of managing the message memory 5 of the control unit 4. Here, the protection period may be variable for each message or fixed at a fixed period. In the following description, a variable case will be described as an example. However, even in the case of a fixed value, only a halfway process is omitted, and a specific description thereof will be omitted for simplicity.

The process of managing the message memory 5 by the control unit 4 shown in FIG. 2 is started upon receiving a message. The control unit 4 displays the received message (S1) and waits for an input of a SW pressed by the user (S2).

In step S2, the user selects the SW
When the user presses 2, the process returns to step S1 to display the next stored (previously received) message. That is, the user can sequentially display the messages received so far by pressing the select SW2 many times.

When the user presses the set SW3 in the process S2, the process is terminated and the process returns to a state of waiting for a message to be received. Further, in process S2,
When the user presses the mode SW1, a message (protection guidance) for prompting whether to add a protection attribute is displayed, and the user waits for an input of the SW (S3).

That is, in the process S2, the mode SW
1 is for inputting an instruction to add an attribute of protection, the select SW2 is for inputting an instruction to sequentially display messages, and the set SW3 is to stop displaying the message and wait for the message. An instruction to return to is input.

In step S3, when the mode switch 1 is pressed, the control section 4 returns to step S1. In addition, processing S3
, When the set SW3 is pressed, a screen for selecting a period to be protected is displayed (S4).

Then, in step S4, select SW
When 2 is pressed, the period to be protected is reset by the operation of the user (S5), and the process returns to S4. Processing S
In step 4, when the set SW3 is pressed, the data of the protection period selected in step S4 and the protection attribute are added to the message (S6). And the control part 4
Processing ends.

The control unit 4 periodically scans the message memory 5 to search for messages to which the protection period has passed among messages to which the protection attribute has been added. When such a message is found, the protection attribute is lost and the protection setting is released. That is, the message does not have the attribute of protection.

Here, the control unit 4 periodically or at the timing of receiving the message stores the message memory 5
To search for messages with the protection attribute added to the protection attribute. If such a message is found, an alarm sounds and the user Announce that they will lose their protection attributes,
SW to confirm whether to extend the period of protection to the user
An operation may be requested. The notification here may include vibration of a vibrator, message display, and blinking display of the message, in addition to sounding of an alarm.

Further, the control section 4 may make such a notification at a fixed time before the elapse of the protection period. At that time, the control unit 4 may search for a message that has passed a time point earlier than the protection time point by a preset time when scanning the message memory 5 and perform the above notification. It is also conceivable to set a fixed time after receiving a message instead of setting a fixed time calculated backward from the elapse of the protection period.

Further, the control unit 4 stores the messages in the message memory 5 in the order of reception in the same manner as in the prior art, and when the message memory 5 becomes full and receives another message, the protection attribute is added. Among the messages that have not been received, the oldest message is deleted, and the newly received message is stored in the message memory 5.

Further, in the process S2, when the select SW2 is depressed and the messages which have been set to the protection attribute are displayed when the messages received so far are sequentially displayed, the control unit 4 executes the processing of the message. The remaining period of the protection period may be displayed. In this case, the control unit 4 may compare and display the protection period to be added to the message and the current time.

Next, the operation of the first apparatus will be described with reference to FIG. FIG. 3 is an explanatory diagram showing a change in the contents of the message memory 5 in an example of the operation of the first apparatus. The message memory 5 stores a message corresponding to a memory number and an attribute (including data of a protection period) as to whether or not the message is protected. It is assumed that up to five messages can be stored in the message memory 5. Initially, messages A to D are stored as shown in FIG. 3 (a), of which messages C and D are protected. It is said that attributes have been added.

First, when messages EG are received,
When the message E is stored, the message memory 5 becomes full. Therefore, since message A and message B are messages to which the protection attribute is not added,
These are deleted, and the message F and the message G are newly stored. And the contents of the message memory 5 are:
The result is as shown in FIG.

It is assumed that the user simply presses the set SW3 when the messages E to G are displayed. That is, it is assumed that no protection attribute is added to the messages E to G.

Here, when the message H is further received, among the messages to which the protection attribute is not added,
The oldest message E is deleted, and the message H is newly stored. And the message memory 5
Is as shown in FIG. 3 (c). Note that the user does not add a protection attribute to the message H.

Here, assuming that the protection period of the message C and the message D has elapsed, the protection attribute of the message C and the message D is lost, and the protection setting is released. Therefore, when the message I is further received, the oldest message C is deleted from the messages to which the protection attribute is not added, and the message I is newly stored. Then, the contents of the message memory 5 are as shown in FIG.

According to the radio paging receiver of the present embodiment, the attribute of protection is lost after the elapse of the preset protection period, so that the message memory is stored after the protection setting is released. When the message is full and messages are received, messages for which protection has been released will be deleted in the oldest order, preventing messages from being deleted against the user's will and saving message memory. There is an effect that can be used effectively.

In this case, the protection period is set together with the attribute of the protection. However, the ID-R storing a unique number (ID number) for each radio pager is set.
A protection period may be set in advance in the OM. In this case, if a setting for adding a protection attribute is made in the same manner as in the related art, the protection period stored in the ID-ROM is read and set as a default.

Further, a default of the protection period may be set as an initial setting to be performed when a user newly purchases a radio pager. In this case, if the settings are stored in a non-volatile ROM, the contents can be retained even when the power is turned off.

As described above, here, one message memory is provided, and the protection setting is released for a message whose protection attribute has been set and the protection period has elapsed. As a second embodiment of the present invention, a message memory for storing messages to be protected (hereinafter, referred to as “protected memory”) and a message memory for storing unprotected messages (hereinafter, referred to as “unprotected memory”). ), And the message may be moved from the protected memory to the unprotected memory after the protection period has elapsed.

The configuration of the radio paging receiver (second main unit) according to the second embodiment is the same as that of the first main unit shown in FIG. Processing,
The contents of the message memory 5 are different from those of the first main unit.

Hereinafter, each component will be described in detail. However, since the mode SW1, the select SW2, and the set SW3 are all the same as those of the first apparatus, the description thereof will be omitted.

The message memory 5 is divided into a protected memory for storing messages to be protected together with a protection period set for each message, and a non-protected memory for storing unprotected messages. That is, the message memory 5 includes an unprotected memory and a protected memory,
The unprotected memory stores a message corresponding to the memory number, and the protected memory is connected to the message of the unprotected memory by a pointer, and stores the message and the attribute indicating the protection period in a corresponding manner.

Here, the process of managing the message memory 5 of the control unit 4 will be described with reference to FIG. FIG. 4 is an explanatory diagram showing the contents of the message memory 5 in the second main unit. The control unit 4 displays the received message,
Waits for the input of the SW pressed by the user, and the user
When W1 is pressed, a message (protection guidance) prompting whether to add a protection attribute is displayed, and the user's S
Wait for W input. In this case, the user sets the mode S
The processing when the select SW2 and the set SW3 are pressed instead of the W1 is the same as that of the first main unit described above, but the received message is stored in the unprotected memory of the message memory 5 at that time. Is stored.

Then, when the user presses the set SW3, the control unit 4 displays a screen for selecting a period to be protected. The period to be protected is reset by the operation of the select SW2 by the user as in the case of the first main unit. When the user further presses the set SW3, the message is stored in the protection memory of the message memory 5 together with the data of the selected protection period.

Further, the control unit 4 periodically scans the protection memory of the message memory 5 and searches for a message stored in the protection memory for which the protection period has elapsed. When such a message is retrieved, the message is copied to unprotected memory,
Delete from protected memory. That is, the message has been moved from the protected memory to the unprotected memory, and is handled in the same manner as an unprotected message.

In FIG. 4, when messages A to E are received, only message C is a message to be protected. Therefore, the message C is stored in the protected memory, and the remaining messages A to E are stored in the unprotected memory. In FIG. 4, the area of the memory number corresponding to the message C in the unprotected memory is empty due to the movement of the message.

Further, the control unit 4 may request the user to perform a SW operation for confirming whether to extend the protection period when moving the message from the protected memory to the unprotected memory. .

Further, the control unit 4 deletes the oldest message from the unprotected memory and receives a new unprotected message after the unprotected memory of the message memory 5 is full after receiving the unprotected memory. The received message is stored in the unprotected memory of the message memory 5.

Here, the protected memory and the unprotected memory are both described as separate areas of the message memory 5, but the protected memory may be formed as a completely different nonvolatile memory, for example, as an area of an ID-ROM. I do not care. Further, the protected memory is replaced with a normal memory, and the unprotected memory is replaced with an ID-RO.
It is also conceivable to use a non-volatile memory such as one area of M, or to secure both a protected memory and an unprotected memory in the non-volatile memory.

The operation of the second main unit is the same as the operation of the first main unit, and a description thereof will be omitted.

[0067]

According to the first and second aspects of the present invention, a period in which a received message is not deleted is set, and the message is held in a memory before the period elapses. Since it is a radio page receiver that can be deleted, it is possible to prevent a message from being accidentally deleted for a certain period of time, and also to prevent the message from remaining in the message memory after that. There is an effect that the memory can be used effectively.

According to the third aspect of the present invention, a period during which a received message is not deleted is set, the message is held in a memory before the period elapses, and after the period elapses, it is notified that the set period has elapsed. If you can choose to extend the period after notification or delete the protection attribute, the message will be deleted unexpectedly for a certain period. And the ability to choose to keep messages after the protection period has expired, it is possible to prevent messages from being deleted due to the expiration of the period when there is no intention to delete the message, and Also prevents the message from remaining in the message memory,
There is an effect that the message memory can be used effectively.

According to the present invention, when the control unit receives the input of the message received by the wireless unit, the control unit allows the user to select whether or not to set the attribute of protection to the message and to use the message. If the user selects to set the attribute of protection for the message, the message is stored in the message memory together with the attribute of protection and the protection period, and the message memory is scanned. Since the radio paging receiver is characterized by deleting or notifying the protection attribute of the message, it is possible to prevent the message from being accidentally deleted and to store the message semi-permanently. And the message memory can be effectively used.

According to the twelfth to seventeenth aspects, when the control unit receives an input of a message received by the radio unit, the control unit allows the user to select whether or not to set a protection attribute in the message and to use the message. If the user selects to set the attribute of protection on the message, the message is stored from the unprotected memory to the protected memory together with the protection period, and
The radio memory receiver scans the protected memory and, when there is a message whose protection period or the like has passed, moves or informs the message from the protected memory to the unprotected memory. In addition, it is possible to prevent the message from being deleted in spite of the fact that the message is stored semi-permanently in the memory, and to effectively use the message memory.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of a first main unit.

FIG. 2 is a flowchart illustrating a process of managing a message memory 5 by a control unit 4.

FIG. 3 is an explanatory diagram showing a change in the content of a message memory 5 in an example of the operation of the first main unit.

FIG. 4 is an explanatory diagram showing the contents of a message memory 5 in the second apparatus.

FIG. 5 is an explanatory diagram showing a change in the contents of a message memory in an example of the operation of a conventional paging receiver.

[Explanation of symbols]

1: Mode SW, 2: Select SW, 3: Set S
W, 4 ... Control unit, 5 ... Message memory

Claims (17)

[Claims] 1. A radio paging receiver, wherein the protection setting of a message which needs to be protected among received messages is canceled when a set protection period ends. 2. A method according to claim 1, wherein the received message is stored in a message memory together with a protection attribute for setting whether or not the message is protected from deletion, and a protection period for adding the protection attribute. A radio paging receiver, which cancels the protection setting of a message for which elapse has occurred. 3. A received message is stored in a message memory together with a protection attribute for setting whether or not the message is protected from being deleted, and a protection period for adding the protection attribute. A radio pager, which notifies, when the protection period elapses, or when there is a message that has passed a point in time that is earlier by a preset time before the protection period elapses. 4. An operation unit for inputting an instruction, a radio unit for receiving a message, a display unit for displaying a message, a message memory for storing a message, and receiving the message received by the radio unit, A radio pager having a control unit for outputting to a display unit, wherein the control unit receives, from the operation unit, an instruction to add a protection attribute to the received message, and includes a protection period and a protection period in the message. And storing the message in the message memory, scanning the message memory, and searching for a message whose protection period has passed, and canceling the protection setting of the message. Wireless paging receiver. 5. The radio pager according to claim 4, wherein the control unit deletes the message from the message memory when releasing the protection setting of the specific message. 6. An operation unit for inputting an instruction, a radio unit for receiving a message, a display unit for displaying a message, a message memory for storing a message, and receiving the message received by the radio unit, A radio pager having a control unit for outputting to a display unit, wherein the control unit receives, from the operation unit, an instruction to add a protection attribute to the received message, and includes a protection period and a protection period in the message. And storing the message in the message memory, scanning the message memory, and erasing the protection period, or a message that has passed a predetermined time before the lapse of the protection period. Is searched, the notification that the protection period of the message has elapsed and an instruction to cancel the protection setting of the message are received,
A radio paging receiver, which is a control unit for canceling protection setting of the message. 7. The radio paging receiver according to claim 4, wherein the protection period is variable for each message. 8. The control unit according to claim 4, wherein the control unit adds a protection period input from the operation unit to the message together with the protection attribute and stores the message in a message memory. The radio paging receiver according to claim 6 or 7. 9. A control unit comprising a non-volatile memory for storing a protection period, wherein the control unit adds a protection period read from the non-volatile memory to a message together with a protection attribute and stores the message in a message memory. 8. The radio paging receiver according to claim 4, wherein the radio paging receiver is a radio paging receiver. 10. The radio pager according to claim 9, wherein the non-volatile memory is an ID-ROM for storing an ID of the radio pager. 11. The radio paging receiver according to claim 4, wherein the protection period is a fixed period. 12. An operation unit for inputting an instruction, a radio unit for receiving a message, a display unit for displaying a message,
A radio pager having a protected memory for storing a message to be protected, an unprotected memory for storing an unprotected message, and a control unit for receiving an input of a message received by the radio unit and outputting the message to the display unit. When the control unit receives an instruction to protect a message received from the operation unit, the control unit stores the message in the protected memory, scans the protected memory, and detects a message after the protection period has passed. A radio paging receiver, which is a control unit that, when searched, moves the message to an unprotected memory. 13. An operation unit for inputting an instruction, a radio unit for receiving a message, a display unit for displaying a message,
A radio pager having a protected memory for storing a message to be protected, an unprotected memory for storing an unprotected message, and a control unit for receiving an input of a message received by the radio unit and outputting the message to the display unit. When receiving an instruction to protect a message received from the operation unit, the control unit stores the message in the protected memory, scans the protected memory, and the protection period elapses, or When a message that has passed a point in time before a preset time before the protection period elapses is searched, it is notified that the protection period of the message has passed, and an instruction not to protect the message is received, A radio paging receiver, which is a control unit that moves the message from a protected memory to an unprotected memory. 14. The radio paging receiver according to claim 12, wherein the protection memory is a nonvolatile memory. 15. The radio pager according to claim 14, wherein the nonvolatile memory is an ID-ROM. 16. The control unit according to claim 4, wherein when displaying the message to which the attribute of protection is added, the control unit displays the remaining period of the protection period. The radio paging receiver according to claim 6, claim 7, claim 8, claim 9, claim 10, or claim 11. 17. The control unit according to claim 12, wherein when displaying the message stored in the protected memory, the control unit displays the remaining period of the protection period. Item 16. The radio paging receiver according to Item 14 or 15.