JPH0671227B2 - Wireless individual call receiver - Google Patents

Description

TECHNICAL FIELD The present invention relates to a wireless individual paging receiver, and more particularly to a wireless individual paging receiver with an improved method for selecting a reception frequency.

[Conventional technology]

A wireless individual call receiver is a device that receives an individual calling number, receives a wireless signal transmitted from a base station carried by a user, and issues an alarm when its own calling number is detected. Some have a function to receive and display numbers and character information that are specially sent at the same time.

This radio paging receiver usually incorporates a crystal oscillator and is designed to receive one radio frequency. In recent years, with the development of microelectronics, a receiver that incorporates a low-voltage, low-power frequency synthesizer and automatically selects the frequency used in the region where the receiver currently exists from a large number of frequencies Is becoming known.

In this type of receiver, it is necessary to automatically tune to the frequency sent from the base station, so in the standby state the incoming radio waves are scanned at multiple frequencies that have been set at all times, and the preamble is included in the received signal. When the signal is detected, it is tuned to the frequency.

[Problems to be solved by the invention]

In the conventional radio individual paging receiver described above, the synthesizer operates to sequentially scan the frequency, detects the used frequency of the area in which the receiver exists, and tunes to that frequency. There is a drawback that the user cannot see or specify from the outside. In addition, since the wireless unit is operated for a longer time corresponding to the scanning, the current consumption of the receiver increases and the battery life becomes shorter.

The object of the present invention is to eliminate the above-mentioned drawbacks and to display the channel number and area name on the display section so that the user can easily select the frequency to be used and easily confirm the selected frequency. It is to provide a wireless individual paging receiver that can.

[Means for solving problems]

The radio individual call receiver of the present invention is a radio individual call receiver capable of receiving at least two frequencies, a storage unit that stores the frequency and a region name corresponding to the frequency in combination, the frequency and the region. And a frequency selecting means for selecting a desired frequency from the frequencies based on the frequency displayed on the displaying means and the area name.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

FIG. 1 is an external view of an embodiment of a wireless individual paging receiver of the present invention, in which a display 2 is attached to a part of a housing 1 used for carrying and the received data is displayed to a user. I try to provide various information. The power switch 3 is
This is the power switch of this receiver. The display read switch 4 is for reading the information accumulated in the memory inside the receiver, the backlight switch 5 is a switch for the backlight of the display 2, and the reception frequency selection switch 6 is for selecting the reception frequency. It is a switch to do.

FIG. 2 is a front view showing an example of display contents of the wireless individual paging receiver shown in FIG. The channel number selected by the wireless individual call receiver and the area name used are displayed as the reception frequency area display 7, and two examples are displayed in FIG. This display is not shown in a usual radio individual paging receiver, and this is displayed when the power switch 3 is turned on or the reception frequency selection switch 6 is operated.

FIG. 3 is a block diagram showing the configuration of an embodiment of the present invention, in which an antenna 8 and a radio section 9 for receiving and demodulating a transmission signal are provided.
And a logic unit 10 including a storage unit that stores a region name corresponding to a receivable frequency in combination, a display unit 2 that constitutes a display unit that displays the region name stored in the logic unit 10, a display read switch 4, and Backlight switch 5
In addition to the reception frequency selection switch 6, the logic unit 10 and the frequency scanning unit 11 that constitute frequency selection means for selecting a desired frequency based on the area name and frequency displayed on the display unit 2, the power switch 3 It has a configuration provided. The transmission signal sent from the transmitter is the antenna 8
Is supplied to the wireless unit 9 via the and is demodulated. The demodulated signal is decoded in the logic unit 10, and if it matches the individual identification number given to the receiver, it informs the user that there is a call by means such as ringing sound or vibration, and a message is sent at the same time. If so, the display is displayed on the display unit 2, and at the same time, the contents are stored in the built-in RAM of the logic unit 10.

The user can read the message contents at any time by pressing the display read switch 4. The radio paging receiver includes a frequency scanning unit 11 including a frequency synthesizer, and supplies a local frequency to the radio unit 9. The frequency scanning unit 11 is capable of changing the oscillation frequency at regular intervals, and has a configuration capable of receiving a large number of frequencies as a receiver. The built-in ROM of the logic unit 10 is pre-programmed with a reception frequency, a channel number corresponding to the reception frequency, and an area name in which the frequency is used. When the reception frequency selection switch 6 is pressed, the reception frequency is switched, and at the same time, the second frequency is selected. As shown in the figure, the channel number and the area name corresponding to the frequency are displayed on the display unit 2, and the frequency of the area where the user exists can be selected. Regarding the frequency scanning method, a method in which the frequency changes every time the reception frequency selection switch 6 is pressed,
There is a method of pressing the receiving frequency selection switch 6 again to stop scanning when the area name to be selected is displayed while automatically scanning sequentially by pressing once, but in either method, the logic part It is possible by selecting 10 built-in programs. The conventional radio paging receiver capable of receiving multiple frequencies is not equipped with the frequency selection switch 6 and the channel number / area name display program, and the frequency scanning unit 11 is always turned on by turning on the power switch 3. Scanning is performed to search for the transmission frequency from the base station.

Next, an example of frequency selection will be described with reference to the flowchart of FIG. By turning on the power switch 3 of the receiver and performing step 101, the frequency and channel number / area name selected by the receiver are displayed on the display unit 2 as shown in the example of FIG. When the area name in which the user intends to use the receiver is displayed, the user directly enters the reception mode of step 103 and waits for transmission from the base station. In the case of NO in step 102 where the area name is different, the user can select the frequency of the area to be used by performing step 104 of operating the frequency selection switch 6, and this is selected in step 105
Indicate. Further, as shown in steps 106, 107 and 108, when the user moves to another area in the reception mode, the receiver frequency is selected by operating the reception frequency selection switch 6 again to select the moved area name. Can be set.

〔The invention's effect〕

As described above, according to the present invention, the reception frequency selection switch 6 is mounted on the radio paging receiver for multi-frequency reception, and the channel number or the use area name of each frequency desired to be selected is displayed. There is an effect that the used frequency can be easily selected and the frequency selected by the receiver can be easily confirmed.

Further, unlike the conventional multi-frequency receiver, since the channel scanning is not always performed, it is possible to shorten the time for monitoring the transmitted wave, and it is possible to significantly reduce the current consumption of the receiver. There is an effect.

Furthermore, considering the entire system including the base station system, it means that the receiver side is receiving one frequency, so that the transmission frequency from the base station is transmitted in order to keep the reception frequency of the scanning receiver at the used frequency. It is possible to shorten the preamble signal being used, and accordingly, it is possible to transmit a large number of call signals, thereby increasing the number of subscribers and effectively utilizing the frequency.

[Brief description of drawings]

FIG. 1 is an external view of an embodiment of a wireless individual call receiver according to the present invention, FIG. 2 is a front view showing the display contents of the wireless individual call receiver of FIG. 1, and FIG. 3 is one embodiment of the present invention. FIG. 4 is a block diagram showing an example configuration, and FIG. 4 is a flow chart showing an operation example of an embodiment of the present invention. 1 ... Housing, 2 ... Indicator, 3 ... Power switch, 4 ...
... Display call switch, 5 ... Backlight switch, 6 ... Reception frequency selection switch, 7 ... Reception frequency area display, 8 ... Antenna, 9 ... Radio section, 10 ... Logic section, 11 ... Frequency Scanning department.

Claims (1)

[Claims] 1. A radio individual paging receiver capable of receiving at least two frequencies, a storage unit for storing the frequency and a region name corresponding to the frequency in combination, and a combination display of the frequency and the region name. And a frequency selecting means for selecting a desired frequency from the frequencies based on the frequency displayed on the displaying means and the area name.