JPH04306926A - Selective calling receiver - Google Patents

Abstract

PURPOSE:To recognize a time zone later for which reception of a selective call signal sent from a base station was impossible by storing the time zone for which the selective calling signal could not be received and displaying the storage content as required. CONSTITUTION:A control signal sent from a base station periodically is received by an antenna 1 and led to a reception discrimination circuit 4a in a control circuit 4 via a radio line 2 and a demodulation circuit 3. The reception discrimination circuit 4a discriminates whether or not a signal is able to be received at present based on a level of the control signal. When it is discriminated not to be in a receptible state, that is, to have been in a reception impossible state, the time is detected by a clock circuit 8 and stored in a RAM 6. When the state is again to be a receptible enable state and it is discriminated by the respectively discrimination circuit 4a, the time is detected by the clock circuit 8 and stored in the RAM 6. When the time data stored in the RAM 6 is desired to be known later, a switch 7 is operated to display the data on an LCD 13.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a selective call receiving device that receives a selective call signal transmitted from a base station and performs a selective call, and in particular is capable of storing and displaying a time period during which selective call signals cannot be received. The present invention relates to a call receiving device.

0003

2. Description of the Related Art A selective calling device is known which receives a selective calling signal transmitted from a base station and selectively calls the owner of the device using sound, light, message display, etc. By the way, even if the owner of this selective calling device is within the receiving service area, if the user is in an area where selective signals cannot be received, such as in a subway, the selective calling device will be in a reception disabled state. Therefore, a selective call cannot be made to the owner of this selective call device.

[0004] Therefore, the conventional selective calling device of this type has the following features:
It is configured to detect this unreceivable state from the received electric field level of control signals for reception synchronization transmitted from the base station, and to display this on a display provided for displaying messages, etc. ing. Therefore, the owner of this selective calling device can know whether the device is in a state where it is unable to receive calls by constantly looking at the display on the display. but,
Due to the nature of how this selective calling device is used, it is impossible to constantly watch the display, and there may be times when this device is in an area where selective calling signals cannot be received and the device does not function as intended. However, if you do not notice this, you may not be able to answer calls from the base station.
In some cases, important calls may be missed.

[0005]

[Problems to be Solved by the Invention] As mentioned above, in the conventional selective calling device, although it is possible to tell whether or not reception is possible by looking at the display state of the display, it is difficult to always check the display state of the display. For example, if you are on the subway, etc., and the receiver returns to the ground after a period of unreceivable reception without you noticing, the receiver cannot receive a call while the receiver is unreceivable. There was a problem in that it ended without knowing whether something had happened or not.

[0006] Therefore, the present invention has been made in view of the above-mentioned conventional problems, and its purpose is to:
An object of the present invention is to provide a selective calling device that can later know the time zone during which selective calling signals transmitted from a base station cannot be received.

[Configuration of the invention]

[0008]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a selective calling device that receives a selective calling signal transmitted from a base station and performs selective calling.
reception determination means for determining whether or not the selective paging signal can be received from the received electric field level of the control signal from the base station; a clock means for outputting time information; a determination output of the reception determination means; and the clock means. storage means for determining the unreceivable time period of the selective calling signal from the time information output of and storing the unreceivable time period of the selective calling signal; The present invention is characterized by comprising a display means for displaying the information.

[0009]

[Operation] The time period during which the selective call signal cannot be received is determined from the judgment output of the reception judgment means and the time information output of the clock means, and the time period during which the selective call signal cannot be received is automatically stored in the storage means. The time period during which the selective calling signal could not be received is displayed on the display means as necessary.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a selective calling device of the present invention.

First, to explain the configuration, the selective call receiving device according to this embodiment includes an antenna 1, a radio circuit 2, a demodulation circuit 3, a control circuit 4 having a reception determination circuit 4a and a code verification circuit 4b, a ROM 5, RAM 6, switch 7, clock circuit 8, LED drive circuit 9, speaker drive circuit 10, L
It is composed of an ED 11 and a speaker 12, and the current time is displayed on the screen of the LCD 13 except when a selective call signal is received.

Next, the selective calling operation of this embodiment will be explained. When a selective calling signal is transmitted from a base station (not shown), this selective calling signal is received by antenna 1.
The signal is applied to the control circuit 4 via the radio circuit 2 and the demodulation circuit 3, and then guided to the code matching circuit 4b.

The code matching circuit 4b compares the individual number code included in the selective call signal that has been transmitted and the individual number code (ID code) of the own machine registered in advance in the ROM 5.
It is determined whether or not they match, and if they match, L
The ED drive circuit 9 is operated to cause the LED 11 to blink, and the speaker drive circuit 10 is operated to cause the speaker 12 to sound. This allows the holder of this device to recognize that he or she has been called.

Further, when the transmitted selective call signal is accompanied by a message code, this message code is stored in the RAM 6 and can be displayed on the LCD 13 by operating the switch 7. And in this case, the LCD
The time display previously displayed at 13 will be temporarily interrupted.

By the way, the selective calling device of this embodiment operates the radio circuit 2 intermittently in synchronization with the sending cycle of the selective calling signal from the base station, in order to prevent the consumption of the battery of the power source (not shown) as much as possible. It is configured to receive selective call signals intermittently. To further explain this operation, a base station (not shown) divides a plurality of selective call receivers to which selective call signals are transmitted from this base station into a plurality of groups,
It is configured to transmit a selective call signal for each group, and each selective call receiver detects a synchronization signal included in a control signal periodically transmitted from the base station and selects a group in which it is included. The device is configured to operate its own radio circuit only during the transmission period of the corresponding selective call signal.

Therefore, in this embodiment, it is determined from the received electric field level of the control signal whether or not the selective calling signal is in a receivable state.

That is, a control signal periodically transmitted from a base station (not shown) is received by an antenna 1, and guided to a reception determination circuit 4a in a control circuit 4 via a radio circuit 2 and a demodulation circuit 3. The reception determination circuit 4a determines from the signal level (reception electric field level) of this control signal whether or not the own device is currently in a receiving state. Here, reception determination circuit 4
If it is determined by a that the device is not in a receivable state, that is, if it is determined that the reception is disabled, the clock circuit 8 detects the current time and stores it in the RAM 6. Then, this selective call receiving device becomes ready for reception again,
When this is determined by the reception determining circuit 4a, the time at that time is detected by the clock circuit 8 and stored in the RAM 6.

Therefore, for example, when entering a subway or the like, and the received electric field level becomes low, this will cause the reception judgment circuit 4 to
a, the time at that time is stored in the RAM 6, and when the received electric field level recovers again, the time at this time is stored in the RAM 6.

[0020] Later, when you want to know the time data stored in the RAM 6, you can read it by operating the switch 7.
It can be read out onto CD13.

FIG. 2 shows an example of the display on the LCD 13 in this case. The display example shown in FIG. 2 shows that the receiver was unable to receive data from 13:00 to 14:28. Therefore, if there is a possibility that there was a call to oneself during this time period, the user can know about the call during this time period by making an inquiry to the other party.

[0022] In the above explanation, the storage contents of RAM6 can be read out at any time.
The time information stored in the time information can be configured to be deleted every day, for example, at 24:00.

[0023] In this case, the time period during which reception was not possible is
You can check the current day's data at any time, and only need a small capacity storage element.

[0024] Furthermore, if a plurality of unreceivable time periods occur in one day, all of them may be stored in the RAM 6, and these unreceivable time periods may be sequentially displayed by operating the switch 7. can.

Further, the time data stored in the RAM 6 may be configured to be erased at any time by a predetermined operation.

[0026]

[Effects of the Invention] As explained above, in this invention, the time period during which selective calling signals could not be received can be stored, and this stored content can be displayed as necessary, so whether there was a call to the self during that time. This allows you to contact someone you may not be able to contact, and prevent you from missing an important call as much as possible.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a diagram showing an example of a display of unreceivable time in the embodiment shown in FIG. 1;

[Explanation of symbols]

1 Antenna 4 Control circuit 4a Reception judgment circuit 4b Code verification circuit 5 ROM 6 RAM 7 Switch 8 Clock circuit 11 LED 12 Speaker 13 LCD

Claims (1)

[Claims] Claims: 1. A selective calling device that performs selective calling by receiving a selective calling signal transmitted from a base station, which determines whether or not the selective calling signal can be received from the received electric field level of a control signal from the base station. a reception determining means for determining a reception determination means; a clock means for outputting time information; a time period in which the selective calling signal cannot be received is determined from the determination output of the reception determining means and the time information output of the clock means; 1. A selective call receiving device, comprising: storage means for storing a reception-unavailable time period; and display means for displaying a reception-unavailability time period for a selective call signal stored in the storage means.