KR19980067608A - Automatic change of receiving area of wide area pager - Google Patents

Abstract

end. TECHNICAL FIELD OF THE INVENTION The invention described in the claims relates to a method for automatically changing the reception area of a wide area wireless pager, and more particularly, to a method for automatically changing the reception area of a wide area wireless pager without auto scanning. will be.

I. The technical problem to be solved by the present invention is to provide a method for automatically changing the reception area of the wide area pager by only local movement report without automatic search.

All. Summary of the Invention: A method for automatically changing a reception area of a wide area pager,

It receives the local message sent from the transmitter and locks to the service channel frequency of the local message without performing automatic search.

la. Important uses of the invention: can be used in wide area pagers.

Description

Automatic change of receiving area of wide area pager

The present invention relates to a method for automatically changing a reception area of a wide area wireless pager, and more particularly, to a method of automatically changing a reception area of a wide area wireless pager without auto scanning.

In general, a paging receiver is subscribing to a region, so that a wireless paging service is available only within the region. However, in order to overcome these local limitations, a wide area wireless paging system that can be serviced nationwide has been developed to perform a wireless paging service function. A wireless pager subscribed to and serviced by the wide area wireless calling system is called a wide area wireless pager.

Figure 1 shows a block diagram of a wide area pager. The input unit 10 is composed of keys for generating various control signals of the pager. The keys may include a power key for controlling on / off operation of the pager, a lit key for displaying a received message, and the like. The receiver 11 designates a channel by the frequency synthesizer 19, and converts and outputs an RF signal of a designated channel received through an antenna into digital data. The receiver 11 amplifies the weak RF signal received through the designated channel, frequency-converts the amplified signal to the original signal band and demodulates the waveform, and outputs the demodulated signal by digital data. The digital data is data coded at transmission. In addition, the receiver 11 detects a signal intensity (RSSI) of the current channel and outputs it to the controller 15. The decoder unit 12 includes power supply control means and data transmission control means. The power control means outputs a power control signal NBBS (Normal Battery Saving Signal) to control to receive a data stream of a set frame. The data transmission control means decodes the address codeword of the set frame and transmits the message information continuously received at one time to the control unit 15. The power supply unit 14 supplies the operating power of each part of the pager. The power supply unit 14 may be a battery. The switch 13 is connected between the power supply unit 14 and the receiving unit 11 and is switched by the power control signal BSS of the decoder unit 12 to switch the operating power supplied to the receiving unit 11.

The memory 16 may use an EEPROM as a memory for storing information of the pager. The information stored in the memory 16 includes a cap code composed of unique address data and frame data including local information, reference channel frequencies for setting channels of a regional zone, and wireless information in an area set by the reference channel frequency. Stores service channel frequencies for receiving paging services. The controller 15 analyzes the information in the memory 16 to control the call service function of the wide area pager. First, when the input unit 10 receives the power key signal, the controller 15 performs a channel scan function for initial driving. The reference channel frequencies accessed from the memory 16 are sequentially designated, the selected reference frequencies are output at regular intervals, the reference channels are designated, and the reception from the designated reference channel checks the electric field strength of the signal. At this time, the controller 15 determines the region where the current pager is located according to the received electric field strength, and outputs the service channel frequency of the corresponding region to analyze the frame data received from the designated service channel. A frequency synthesizer 19 designates a channel of the receiver 11 according to the channel data output from the controller 15. The channel data may be reference channel frequencies for designating a reference channel frequency in a region and service channel frequencies for a wireless paging service to a subscriber of a wide area pager in the region. The display unit 17 displays various situations and received messages generated during the radio call service under the control of the control unit 15. The display unit 17 may be an LCD. The alarm unit 18 generates an alarm signal upon receiving a message under the control of the controller 15. The alarm unit 18 is composed of means for generating an alarm sound, a vibrator for generating a vibration signal, and the like.

When explaining a mode change method for each area of a conventional wide area pager having the above-described configuration, first, if the mode of the wide area pager is a manual area change mode, the user must select and input the area to be moved. It is inconvenient, and in the automatic area change mode, it performs auto scanning to check the RSSI level and selects the area automatically. Used to be. In addition, since the RSSI level is low in the low electric field, if the automatic search is frequently performed, there is a problem that the call service is not received and the current consumption is increased.

Accordingly, an object of the present invention is to provide a method for automatically changing a reception area of a wide area wireless pager by only local movement report without automatic search.

The present invention for achieving the above object is a method for automatically changing the reception area of a wide area pager,

It receives the local message sent from the transmitter and locks to the service channel frequency of the local message without performing automatic search.

1 is a general block diagram of a wide area pager.

2 is a flowchart of a control unit 15 for automatically changing a reception area according to an embodiment of the present invention.

Hereinafter, an operation according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a flowchart illustrating a process of the controller 15 for automatically changing a reception area according to an embodiment of the present invention. Hereinafter, the reception area automatic change according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. The process is as follows.

First, if the user of the wide area pager wants to move the area, the user moves the area in the same manner as the conventional method to the transmitter of the paging system before moving the area. Afterwards, as a second step, the transmitter, which has received the local mobility report, sends the input local message to the corresponding area pager. In this case, it is assumed that the local message transmitted from the transmitter is transmitted two or more times in consideration of the case where the local message is not received by the corresponding wide area pager. After that, the controller 15 of the wide area pager checks whether a local message is received in step 30. If the local message is received as a result of the test, the controller 15 proceeds to step 32 and sets a reference frequency channel corresponding to the received local message and proceeds to step 34. After that, in step 34, the controller 15 displays the selected area through the display unit 17, and then proceeds to step 36 to lock the service channel frequency of the corresponding area to maintain the reception standby mode state. Therefore, a separate automatic search process is not necessary in the wide area pager.

As described above, the present invention can simplify the control algorithm of the wide area pager control unit by eliminating the automatic search function, while preventing the reduction of the automatic search hit rate that can be caused by the change of the electric field level when performing the automatic search. There is an advantage to this. In addition, the lack of automatic detection also has the advantage of reducing the current consumption.

Claims (2)

In the receiving area automatic change method of the wide area pager, Receiving the local message sent from the transmitter, and automatically lock the receiving area, characterized in that the locking to the service channel frequency of the local message without performing the automatic search. The method of claim 1, wherein the automatic change of the reception area is performed before the area is moved.