KR100194459B1 - Local Search Method of Wide Area Pager - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

Wide Area Pager

2. The technical problem to be solved by the invention

When there are multiple systems using different reference channel frequencies in the same area in the wide area pager, the reference channel data of each system is stored in the memory, and the field strength signal detected in the recovery reference channel is stored in the same area in the auto search mode. By analyzing, the area right where the wide area pager is located is determined.

3. Summary of the Solution of the Invention

A method for detecting a region of a wide area pager having a memory for storing first reference channel data and service channel data of a first system and second reference channel data of a second system includes: Outputting sequentially and detecting the electric field strength received from the reference channel, storing the channel data from which the electric field strength is detected, and corresponding to the first reference channel from which the electric field strength is detected when the electric field strength detection of the first reference channel data is completed; Outputting second reference channel data and detecting electric field strength received in the corresponding second reference channel, comparing and analyzing the electric field strength detected in the two reference channels, and determining a region right corresponding to the reference channel; Outputs the service channel data of the determined region, and processes the radio call signal received from the service channel. It features.

4. Important uses of the invention

In the wide area pager, it is possible to accurately determine the area in which the wide area pager is currently located in an area where radio waves of the base station transmitter overlap.

Description

Local Search Method of Wide Area Pager

1 is a diagram showing the configuration of a wide area pager.

2 is a view for explaining the characteristics of a wide area pager in the radio overlap region by a plurality of base station transmitters.

3 is a flowchart illustrating a process of performing a local search function in a trade pager according to the present invention.

The present invention relates to a local search method for a wide area pager, and more particularly, to a method for stably searching for a current position of a pager in an area where an output of a transmitter overlaps.

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 regional limitations, a wide area wireless paging system that can be serviced nationwide has been developed to perform a wireless paging service function. A radio pager that is subscribed to and serviced by the wide area radio calling system is called a wide area radio pager.

1 is a configuration diagram of the wide area pager, and the input unit 10 is composed of keys for generating various control signals of the pager. The keys may include a power key for turning on / off an operation of a pager, a lead key for displaying a message being received and stored, and the like.

The receiving unit 11 designates a channel by the frequency synthesizing unit 19, and converts the RF signal of the designated channel received through the 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, demodulates it, and waveform-forms the demodulated signal as digital data. It is data coded when transmitting the digital data. In addition, the receiver 11 detects a current signal strength (RSSI: Receive Signal Strength Indicator) 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 NBSS (Normal Battery Saving Signal) to control the data string of the set frame. The data transmission control means decodes the address codeword of the set frame and transmits message information continuously received when the self address information is transmitted to the control unit 15.

The power supply unit 14 supplies the operation 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 13 and the receiving unit 11, and is switched by the power control signal BSS of the decoder unit 12 to switch the operation power supplied to the receiving unit 11.

The memory 16 can use EEPROM as the memory of the pager information. The memory 16 stores information such as a cap code comprising unique address data and region data including region information, reference channel frequencies for setting channels in a region, and a radio calling service in the region set by the reference channel frequency. Stores service channel frequencies for receiving.

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 electric field strength of the signal received from the reference channel is checked. 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 service of a radio calling function to a subscriber of a wireless pager 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 16 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 constituted by a vibrator or the like for generating an alert driver vibration signal.

It is assumed that the region and frequencies currently operating in the wide area wireless calling system are as shown in Table 1 below, and these frequencies are stored in the memory 16.

The wide area wireless pager searches for an area in two ways, according to a manufacturer, using a method of receiving sensitivity (RSSI), and detecting local information provided by an operator. First, the former method is to select a frequency with the strongest electric field among the received frequencies and fix it at a local frequency. In addition, the latter method is a method of detecting a region by detecting the region information provided by the operator as data or by searching the synchronization code or common cap code by software.

When detecting the area using the two methods described above, when searching for the area in which the radio pager is currently located in the area where radio waves overlap, the area can be incorrectly recognized. Here, the overlapped region means a region where transmitter outputs of different regions overlap. In this overlapping area, radio waves transmitted from other areas are stronger than those of the area in which the pager is currently located, which can be mistaken for other areas. 2 shows an example of such an overlapping area. That is, in FIG. 2, although the pager is located in the Gyeonggi area, the radio wave transmitted from the Gangwon area is stronger and can be mistaken as a Gyeonggi area.

The wide area pager must also set up a service area. That is, when the user wants to be provided with the wireless paging service using the wide area wireless pager, the subscriber registers the area right for the service and moves to the corresponding area area to receive the wide area wireless call service. Then, the wide area pager performs an auto scanning function when the power-on or the reference channel frequency of the region is changed to search the reference channel frequency of the region, and then moves to the service channel frequency of the region, to perform the radio call function. Service.

However, as shown in FIG. 2, even if the radio wave of the adjacent area is received more strongly, even if the area is desired in the area for which the wide area pager service is desired, the wide area pager performs an automatic search function and thus the frequency of the unwanted area. Is moved to. However, if the moved area is not a registered service area, there is a problem that the wide area pager cannot receive the wireless call service.

Accordingly, an object of the present invention is to provide a method for accurately setting a service channel frequency of a region in which a wireless pager is located by searching a plurality of reference channel frequencies in a wide area pager.

Another object of the present invention is to store a plurality of reference channel frequencies used in the same area in the wide area pager, and search the plurality of reference channel frequencies when searching the area in the pager to accurately determine the area to radio calling service in the radio overlap region To provide a method that can be performed stably.

In order to achieve the objects of the present invention, a wide area pager stores a memory for storing first reference channel data and service channel data of a first system and second reference channel data of a second system, and the reference channel data. Or a frequency synthesizer for generating frequencies corresponding to service channel data, a receiver tuned to a channel frequency output from the frequency synthesizer, to receive a radio call signal, and to detect and output an electric field strength signal to a corresponding channel; In the automatic search mode, the first reference channel data are sequentially output to the frequency synthesizer, and when the electric field strength signal output from the receiver is detected, the corresponding channel data is stored in the memory, and when the search of the first reference channel is completed, Outputting the second reference channel data corresponding to the channel data stored in the memory to provide an electric field strength signal. Then exported to determine the easement of the reference channel, and outputs the service data of the channel is determined easement characterized by consisting of a control unit for controlling the radio call service.

Also, in order to achieve the object of the present invention, there is provided a region detecting method of a wide area pager having a memory for storing first reference channel data and service channel data of a first system and second reference channel data of second systems, Sequentially outputting the first reference channel data in the automatic search mode, detecting the electric field strength received from the reference channel, storing the channel data from which the electric field strength is detected, and electric field strength of the first reference channel data Outputting second reference channel data corresponding to the first reference channel in which the electric field strength is detected when the detection is completed, detecting the electric field strength received in the second reference channel, and comparing the electric field strengths detected in the two reference channels The process of determining the region right corresponding to the reference channel by analyzing and outputting the service channel data of the determined region right, It characterized by a process constituted by any service that the radio call signal received by the channel switch.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same parts in the figures represent the same reference signs wherever possible.

The configuration of the wide area pager used in the present invention is the same as that of FIG. 1, and the reference numerals are the same. In the wide area pager of the present invention, a plurality of reference frequencies for the same area range are stored in the memory 16, and when the automatic search operation is performed, the area range is set by searching the states of the plurality of reference frequencies. Currently, the wide area wireless calling system used in Korea is operated by two systems. That is, in Korea, there are currently 12 radio calling systems and 15 radio calling systems. They use different reference frequencies in the same area to serve wide area radio calling. In addition, the transmitter base station characteristics of these systems, the transmitter base station of the 12 system is located in the outer region of the main gun city and the transmitter base station of the 15 system is mainly located in the city center area. In addition, the 12 systems and the 15 systems are composed of sites in the same region, and different reference frequencies are used in the same region. In the wide area pager of the present invention, the reference frequencies for the corresponding operators and the reference frequencies for the counter operators are stored, for example, in the case of the 012 system, the reference frequencies of the 012 system and the reference frequencies of the 015 system are stored together, and the 015 system In the case of, the reference frequencies of the 015 system and the reference frequencies of the 012 system are stored together.) When detecting the regional zone with the automatic search function, it is possible to accurately determine the regional zone in which the current wide area radio pager is located by detecting the reference frequencies of the same regional zone. For sake.

Therefore, in the wide area pager of the present invention, reference frequencies and service frequencies are stored in the memory 16 as shown in Table 2 below.

In Table 2, Fr is a reference frequency of the corresponding operator wireless calling system (hereinafter referred to as a first system) and Fr is a reference frequency of a corresponding operator wireless calling system (hereinafter referred to as a second system). In the above table, a frequency for searching a reference frequency region and a service frequency are frequencies for serving a radio calling function in the region.

3 is a flowchart illustrating a process of searching a region in a wide area pager according to the present invention.

Referring to FIG. 3, the controller 15 first checks the first reference channel data in the memory 16 in step 311, and stores the current reference channel data as a start channel in step 313. . This means that the region search operation is performed from the current first reference channel data. Here, the first reference channel data generates the reference frequency Fr1-Fr6 of the first system (the corresponding operator system) in Table 2, and the second reference channel data is the second system (the relative operator system) in Table 2 above. Generates the reference frequencies Fr1; -Fr6 '.

In step 315, the controller 15 outputs the current first reference channel data to the frequency synthesizer 19, and the frequency synthesizer 19 generates a reference frequency corresponding to the first reference channel data and outputs it to the receiver 11. Then, the receiver 11 is set to the reference frequency output from the frequency synthesizer 19 to receive the RF signal. In this case, the reference frequency is a frequency for searching for a regional zone as described above. The receiver 11 is tuned to the reference frequency and detects an RSSI signal of the tuned reference channel and applies it to the controller 15.

In step 315, the controller 15 checks whether a signal is detected in a corresponding reference frequency channel. If no signal is detected at the current reference channel frequency, this indicates that the location of the current wide area pager is not located in the region corresponding to the currently output reference frequency. In this case, the controller 15 accesses the next reference channel data stored in the memory 16 in step 319, and checks whether the reference channel data currently accessed in step 321 is the reference channel data stored as the start channel in step 313. In this case, if the accessed reference channel data is not the reference channel data stored as the start channel, the flow proceeds to step 315. Then, the frequency synthesizing unit 19 generates a reference frequency corresponding to the corresponding reference channel data and outputs it to the receiving unit 11. The receiving unit 11 is tuned to the corresponding reference frequency to receive the RF signal. If the current reference channel data is the reference channel data stored as the start channel in step 321, the search for the first reference channel data corresponding to all the zones is completed. Therefore, the region search operation is stopped and the process proceeds to step 329.

If a signal is detected in the reference channel currently set in step 317, the controller 15 stores the current first reference channel number and electric field strength value in the memory 16 in step 323. This means that the wide barge pager is located in a local area corresponding to the reference frequency currently output. Thereafter, the controller 15 checks whether reference channel data currently accessed in step 325 is reference channel data stored as a start channel in step 313. In this case, if the accessed reference channel data is not the reference channel data stored as the start channel, the flow proceeds to step 315. Then, the frequency synthesizing unit 19 generates a reference frequency corresponding to the corresponding reference channel data and outputs it to the receiving unit 11. The receiving unit 11 is tuned to the corresponding reference frequency to receive the RF signal. In addition, if the current reference channel data is the reference channel data stored as the start channel in step 327, since the search of the first reference channel data corresponding to all the zones is finished, the region search operation is stopped and the process proceeds to step 329. .

As described above, the controller 15 sequentially searches for the first reference frequencies Fr1-Fr6 as shown in Table 2, performing steps 315 to 327, and checks whether a signal is detected in a corresponding region. Reference channels are stored in the memory 16.

Thereafter, the controller 15 checks the number of reference channel data currently stored in the memory 16 in step 329. In this case, when the reference channel frequencies stored in the memory 16 are two or more as shown in Table 2, the controller 15 accesses the first reference channel data stored in the memory 16 after accessing the first reference channel data in step 335. The second reference channel data corresponding to the second reference channel data is accessed. That is, the reference channel frequency of the second system (the radio calling system for a partner) corresponding to the reference channel frequency at which the current signal is detected is selected.

The controller 15 outputs the second reference channel data to the frequency synthesizer 19, and the frequency synthesizer 19 generates a reference frequency corresponding to the second reference channel and outputs the reference frequency to the receiver 11. In addition, the controller 15 detects the electric field strength value of the signal received by the receiver 11 tuned to the second reference channel frequency and stores the electric field strength value in the memory 16.

Then, the second reference channel data corresponding to the next first reference channel data stored in the memory 16 is accessed, and the above-described operation is repeatedly performed to detect the electric field strength value. The above operation is performed in the same manner for all first reference channel data stored in the memory 16.

The memory 16 is then tuned to the reference frequencies of the first system and received a received signal strength indicator (RSSI) value and the reference frequencies of the second system corresponding to the reference frequencies of the first system, respectively. It will store the received field strength values tuned to. That is, the memory 16 stores the received electric field strength in synchronization with reference frequencies of the first system and the second system in the same region.

Then, in step 337 and 339, the control unit 15 sequentially accesses the field strength values corresponding to the reference frequencies of the first and second systems in the same region, stored in the memory 16, and then the same of the two systems. The field strength values detected in the regional zones are compared and analyzed. Therefore, when the radio pager is located in a region where radio waves for receiving a plurality of reference channel frequencies overlap, the control unit 15 is each in a host channel of another system in the same region as the reference channel of the system at the location where the radio pager is subscribed to. The received electric field strength value is used to determine the region of the region where the heavy waves overlap.

In this case, two or more reference channels have received field strength values. Therefore, by measuring the electric field strengths detected by the two systems, each of the zones corresponding to the reference frequencies of the two systems is checked, and then the zones where the radio pager is currently located. To judge. Herein, the controller 15 assigns a weight to each of the electric field strength values detected by the first reference frequency and the intensity of the electric field strength values detected by the second reference frequency, and then uses the values included in these weights to determine the area. To judge. In this case, a weighting factor is applied to the field strength value of the first system to which the corresponding pager is subscribed, and priority is given to the field strength value of the system to which the pager is subscribed.

When determining the region right located in the wide area wireless paging device in the same manner as described above, the controller 15 outputs the service channel data corresponding to the region right in step 341 to the frequency synthesizer 19. Then, the frequency synthesizer 19 generates a service channel frequency corresponding to the received service channel data. Accordingly, the receiver 11 tunes to the service channel frequency to perform a radio call service function.

However, if the number of reference channels stored in the memory 16 is one in step 329, the mobile station moves to the service channel corresponding to the newly detected reference frequency in step 333 to perform the general wide area wireless calling service function. In addition, if there is no reference channel information, since it is a general wireless calling service, the current service channel is maintained as it is in step 331.

When the area is searched by the wide area pager in the above manner, as shown in FIG. 2, the area where the radio pager is currently located can be accurately determined even in an area where radio waves of each area are overlapped. It stores the reference frequencies of multiple radio calling systems operating at the frequencies handled in the same area, calculates the field strength of the signal corresponding to the reference frequency at which the signal is detected, and then calculates the field sugar detected by these two reference frequencies. By comparing and analyzing, you can accurately determine the territories in which you are currently located.

Claims (2)

A local detection method of a wide area pager having a memory for storing reference channel information of a first wireless calling system and reference channel of another wireless calling system, the method comprising: receiving at reference channels of the first wireless calling system in a regional search mode; Detecting and storing the electric field strength of the signal, and upon completion of the electric field strength detection for the reference channels of the first radio calling system, in the reference channels of other radio calling systems that are identical to the local area corresponding to the reference channels. Detecting and storing the received electric field strength, comparing and analyzing electric field strengths of the same regional rights detected in the plurality of reference channels, and determining a regional right where the current pager is located; and the service channel of the determined regional right. Outputs data and processes a radio call signal received in the service channel; Area detection method of the wide area radio pager characterized by. A method for detecting a local area of a wide area call page, comprising storing information of reference channels and service channels of a first system and reference channel information of a second system, wherein the reference channels of the first system are sequentially selected in an automatic search mode. And detecting the electric field strength of the received signal, storing the signal with reference data of the corresponding reference channel when the electric field strength is detected, and detecting the electric field strength of the reference channels of the first system. In the process of checking the number of host channels stored in the channel, and when one reference channel is stored in the channel inspection process, the service channel data of the region is output to end the channel search operation, and the radio call received from the service channel is performed. When the plurality of reference channels are stored in the process of serving a signal and the channel inspection process, the electric field strength is detected Selecting the reference channels of the second system corresponding to the regional zones of the channels and detecting the received electric field strength; and comparing and analyzing the electric field strength values detected in the two reference channels to determine the local zone where the current pager is located. And terminating a search operation by outputting the determined service channel data of the region, and serving a radio call signal received from the service channel.