KR0142946B1 - Pager - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a method of screening a service channel frequency in a wireless pager. In particular, a method of scanning a service channel frequency again by analyzing local information on each reference channel frequency when two or more reference channel frequencies exist by scanning reference channel frequencies. It is about.

2. The technical problem to be solved by the invention

If it is determined that there are two or more reference channel frequencies by scanning the reference channel frequencies, the method provides a method of again scanning the service channel frequencies by analyzing local information about each reference channel frequency.

3. Summary of Solution to Invention

If the reference channel frequency is a strong electric field, the service channel frequency may be a weak electric field, and the service channel frequency may be a strong electric field even if the reference channel frequency is a weak electric field. It is characterized by.

4. Important uses of the invention

Broadband pager

Description

Service Channel Frequency Scanning Method in Wireless Pager

1 is a conventional pager system diagram.

2 is a radio call system according to the present invention

3 is a flow chart according to the present invention

4 is a flowchart of another embodiment of the present invention.

The present invention relates to a method of screening a service channel frequency in a wireless pager. In particular, when two or more reference channel frequencies exist by screening reference channel frequencies, the service channel frequency is re-scanned by analyzing local information on each reference channel frequency. It is about how to.

Existing radio call receiving system has one frequency and address in the region registered by subscriber, frequency distribution is different between neighboring regions, and the same frequency can be used because there is no frequency interference in distant region. Since the address is completely separated by region, it is inconvenient to receive the wireless paging service when the existing pager subscriber leaves the subscription area. Each reference area transmits different reference channel frequencies to each common area, and the wireless pager, which is a frequency synthesis method, receives the reference channel frequency, detects and analyzes local information, and tunes to the service channel frequency.

On the other hand, it is clear that the disclosure is specifically disclosed in Patent Application No. 94-20796 filed by the same applicant of the patent application.

1 is a block diagram of a conventional radio call receiver, in which the RF unit 11 is designated by the frequency synthesizer 14 and converts an RF signal of a designated channel received through an antenna ANT into digital data. Output The RF unit 11 amplifies the weak RF signal received through the designated channel, demodulates the amplified signal after converting the amplified signal into the original signal band, and outputs the waveform by shaping the demodulated signal into digital data. do.

The decoder 12 decodes and outputs the digital coding data output through the RF unit 11. The decoder 12 detects a preamble signal and a word sink in the form of POCSAG code, and detects and outputs its frame data.

The EEPROM 15 is a memory for storing information of the radio call receiver. The information stored in the EEPROM 15 varies depending on the type of subscriber. In the case of a wide area network subscriber, the information stored in the EEPROM 15 includes cap codes consisting of unique address data and frame data including region information, reference channel frequencies for setting channel frequencies in a region, and reference channel frequencies. Stores service channel frequencies for receiving a wireless calling service in the area set by In the case of the local subscriber, the information stored in the EEPROM 15 stores a cap code composed of unique address data and frame data.

The controller 13 analyzes the information of the EEPROM 15 to determine whether it is a local subscriber or a wide area network subscriber, and then controls the operation of the wireless paging service according to the type of subscriber. First, when the subscriber is a local subscriber, the control unit 13 outputs a reference channel frequency to which the subscriber belongs to designates a channel.

Secondly, when the subscriber is a wide area network subscriber, the controller 13 sequentially selects reference channel frequencies accessed from the EEPROM 15, and designates a channel since the selected reference channel frequencies are output at regular intervals. Check whether data is received from the designated channel.

In this case, when data is received, the region information included in the cap code is analyzed to determine the region where the current wireless call receiver is located, and then the service channel frequency of the corresponding region is output and the frame data received from the designated service channel is analyzed. . The control unit 13 outputs a power control signal for controlling the power supply of the RF unit 11 at regular intervals to perform a power saving mode.

A frequency synthesizer 14 designates a channel of the RF unit 11 according to channel data output from the control unit 13. The channel data are reference channel frequencies for designating a reference channel frequency of a regional area and service channel frequencies for a radio calling service of a wide area network subscriber.

The display unit 16 displays various situations and received messages generated during the radio call service under the control of the control unit 13. The display unit 16 may be an LCD. The alarm unit 17 generates an alarm signal upon receiving a message under the control of the control unit 13. The alarm unit 17 is composed of a means for generating an alarm sound, a vibrator for generating a vibration signal, and the like.

Therefore, a wireless pager that can receive a wide area network service using a conventional wide area system should be frequency synthesized, and it is supposed to receive service by tuning to a service channel frequency by identifying which service area a subscriber is currently in.

However, data coming from the reference channel frequency can be received because it is located in the neighboring area where two or more common areas meet with the wide area network, or because of the characteristics of the wide area network system and the wide area network terminal, it is tuned to the service channel frequency after analyzing the local information. An error may occur even if the data is processed due to the inability to process or the electric field is weak. Therefore, when two or more reference channel frequencies are received when tuning to the service channel frequency after analyzing the local information by performing reference channel frequency scanning, the service corresponding to each area information is performed. By scanning the channel frequency once again, there is a problem in that the service is tuned to the service channel frequency in a strong electric field.

Accordingly, an object of the present invention is to provide a method of screening service channel frequencies once again by analyzing local information on each reference channel frequency when it is determined that two or more reference channel frequencies exist by scanning the reference channel frequencies.

According to the present invention for carrying out the above object, the service channel frequency may be a weak field even if the reference channel frequency is a strong field, and the service channel frequency may be a strong field even if the reference channel frequency is a weak field. Therefore, the service channel frequency is rescanned.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is a circuit diagram according to the present invention,

The RF frequency converter 11, the frequency synthesizer 14, the decoder 12, the control unit 13, the display unit 16, the EEPROM 15, and the alarm unit 17 are the description of FIG. Since it has been described in more detail description is omitted.

According to the present invention, the output of the RF frequency converter 11 is measured as an intermediate frequency to provide a wireless pager by measuring electric field strength in an adjacent area as shown in FIG. An IF unit 103 which is converted and provided to the decoder 12;

An RSSI unit 105 for converting the output signal converted into IF by the IF unit 103 into a DC voltage according to the intensity of the electric field and outputting the converted DC voltage;

The voltage sensing unit 111 detects an output level from the output of the RSSI unit 105 and provides it to the control unit 13.

3 is a flowchart according to the present invention,

A first process of reading the recorded information to an initial state (n = 1, m = 1, s = 0), starting the timing after Fn tuning with the reference channel number M;

A second process of starting timing in the first process and checking whether data is received for a predetermined time;

A third step of checking whether the reference channel number M has been reached by increasing the number of channels n when the set timing time is exceeded when data is not received in the second step;

When the number of reference channels (M) is reached in the third process, the system checks whether there is local information and enters the reference channel scanning mode when there is no local information (Im). If there is no overlapping region, the service continues, and if there is overlapping region information, a fourth process of checking whether there is a service channel frequency voltage detection value (Sm) generated during scanning;

A fifth step of displaying an area after analyzing the area information Im that alerts when there is no service channel frequency voltage detection value Sm in the fourth step;

When data is received in the second process, the area information is recorded in Im and the order (m, n, s) is increased (m ← m + 1, n ← n + 1, s ← s + 1) so that the number of reference channels The sixth step of checking whether (M) has been reached,

In the sixth step, if the number of tuning channels n is out of the reference channel number M, the process is repeated. If the number of tuning channels n is out of the reference channel number M, the process is repeated again. When the information (Im) is analyzed and the area information (Im) is not less than two, analyze the area information of Im to tune the service channel frequency and then service. If the information (Im) is 2 or more, the initial state is returned. An eighth process of analyzing the local information Im and outputting a voltage sensing value by Ism tuning to increase the number of times and confirming that the voltage sensing output value is the maximum;

In step 8, if the tuning time is not the maximum value within the predetermined period, the next service frequency is tuned; if the deviation is out of the predetermined period, the service frequency is detected. ,

A tenth step of digitizing and recording the detected voltage value of the service frequency in the eighth step and confirming whether the detected voltage value is within a predetermined period;

If within a certain period in step 10, the next frequency is tuned in the ninth step, and after a certain period, the maximum value of the detected voltage values Sn is selected and the corresponding area information Im is read and analyzed, and then the corresponding service is performed. The eleventh process of tuning the channel is performed.

4 is another embodiment according to the present invention.

A first step of reading recorded information into an initial state and tuning a corresponding frequency to check whether data is received by driving a timer;

A second step of waiting for data reception until a reference frequency is reached within a timing in which data can be continuously received when data is not received in the first step;

A third step of analyzing area information when receiving data in the second step to tune a service channel frequency and detecting the tuned voltage value to check application of a predetermined level or more;

If the number of currently tuned channels (n) is less than the reference channel number (M) when the number is less than a predetermined level in the third step, the number of tuning channels is increased (n ← n + 1), and if the number of channels that are more than the reference channel number (M) is 2 The fourth step of checking the overlapping regions;

A fifth step of alerting if there is no voltage sensing value in the fourth step and analyzing and displaying local information;

When the detected value exceeds the predetermined level after the service channel tuning in the third step, the detected value is digitized, and when the current scanning channel number exceeds the reference channel number M, the next channel number n is not exceeded. The sixth step of increasing,

A seventh step of providing a service for two or more overlapping channels when the number of reference channels (M) is exceeded in the sixth step and analyzing the local information by selecting the highest value when not exceeding the number of channels;

In the second step, if there is no data reception for a predetermined time, the channel frequency is increased to check whether it is larger than or less than the reference channel number (M), and when the data is received again, the eighth step of checking the presence or absence of local information (Im) when it is large and ,

In the eighth step, when there is a plurality of area information and two or more areas in the overlapping area, if there is no detection data Sn, an alarm is issued, and if the detection data Sn, the ninth step proceeds to the sixth process.

Therefore, a specific embodiment of the present invention will be described in detail with reference to FIGS. 2 to 4.

Wide-area wireless paging system divides the whole country into several common areas, and each area has a standard channel frequency with local information and always transmits local information.

However, the subscriber can receive the reference channel frequency due to the situation where the two or more common areas are adjacent or due to the circumstances of the wireless calling system and the terminal. Determining that the information is analyzed, and the service channel frequency tuning by tuning the corresponding service channel frequency by analyzing the respective local information to obtain a DC voltage through the service channel frequency tuned during the service channel frequency scanning through the RSSI unit 25, When the output value of the voltage detection is detected and the output value is low, it is determined whether the currently tuned service channel frequency is a weak electric field.

The output value of the voltage detector 111 is tuned to a different service channel frequency at the time of weak electric field according to the determination, and the output value of the voltage detector 111 is detected in the same manner as above, and the output value of the A / D converter of the controller 13 of the voltage detector 111 is high. Is stored in memory and the service channel frequency is scanned in the same way. From the scanning, the A / D converter output values stored in the memory are compared to analyze local information corresponding to the maximum value, and the service is tuned to the service channel frequency.

At this time, local information was identified during reference channel frequency scanning.In the case of service channel frequency scanning, if the output value of the A / D converter is not stored in the memory, all service channel frequencies are determined to be weak electric fields and detected from the local information as an alarm sound. One area is displayed on the display unit 16. However, if the input voltage of the voltage sensing unit 111 is greater than a certain voltage, the output value is high, and if the input voltage of the voltage sensing unit 111 is high, the value is low.

Scanning up to the reference channel frequency (F1-Fn) saves the region information of the reference channel frequency containing the region information in the memory and finishes the reference channel frequency scanning.If more than one region information is stored in the memory, each region information is saved. When analyzing the corresponding service channel frequency S1-Sn, first tune S1 to frequency-convert the RF signal coming into the antenna ANT and the signal coming from the frequency synthesizing unit, and then pass the RSSI unit 105 to obtain the DC voltage to detect the voltage again. After passing through the A / D converter in the unit 111 and the control unit 13, the output value of the voltage sensing unit 111 is first checked, and when the output value is high, the output value of the A / D converter is stored in the memory, and the voltage sensing unit 111 If the output value is low, tune the service channel frequency (S2) and check the output value of the voltage sensing unit 111 and the output value of the A / D converter as described above and store them in the memory. And, it is stored in the memory repeatedly until S3-Sn, and then the output value of the A / D converter stored in the memory is compared and tuned to the maximum service channel frequency, and local information was identified when the reference channel frequency was scanned. When the service channel frequency is scanned, it is checked whether all the output values of the voltage detector 111 are low. If none of the output values of the A / D converter are stored, it is determined that all service channel frequencies are about electric fields, and all service channels are sounded. It indicates that the weak electric field in the frequency and displays the area analyzed in the area information on the display unit 16.

In the process (3a), the control unit 13 reads information from the EEPROM 15 and initializes the state to n = 1, m = 1, s = 0, M is defined as the number of reference channels, and Fn in the process (3c). Please tune in. In step 3d, the timer is turned on and the decoder 12 checks whether the data POCSAG is received in step 3e. When there is no data reception in step 32, it checks whether the timer is completed in step 3e.

In step (32), data reception is continued before the completion of timer (3e), and when the timer is completed in step (3e), the order is increased in step (33) (n ← n + 1) (34). Check whether the increased number n of channels reaches the reference number M.

When the number of reference channels (M) is exceeded in step (34), if there is no local information in step (35), the reference channel scanning mode is entered in step (39), and if there is local information (Im) (36). Make sure that there are two or more duplicates in the process. In the case of the overlapped area information, it is checked whether there is a voltage detection value Sm of the frequency tuned in step 37.

When there is no tuned frequency voltage detection value (Sm), the alarm through the alarm unit 17 in the process (38), and in the process (39) the area information is displayed on the display unit 16 after analysis. However, when there is received data in step (31), it extracts local information from it and records it as Im and increases the variables (n, m, s) to see whether the current number of channels (n) and reference channels (M) have been reached. Check it.

When the number of channels is less than the reference channel number (M) in step (3i), data is received by tuning the next channel number from step (31) to (3j), and when the number of reference channels (M) is exceeded, step (3j). Checks whether two or more local information correspond to. In step (3j), at least two area information is analyzed through steps (3k) and (31), and the service channel frequency is tuned in step (3m).

In step (3p), the voltage sensing value of the tuned frequency band of step (3m) is read (d) to reach a predetermined level (H).

When the detected value (d) reaches a certain level (H) (3m) in the process of digitizing the sensed value (d) and receives the digitalized value, while processing for a certain period and exceeds the corresponding period (3x)- In step (3z) and (31), the highest value is selected, local information corresponding to the selected highest value is read, the service channel is tuned after analyzing the information, and within the range of a predetermined period below a certain level in step (3q). If there is no data in the alarm unit 7 through the alarm state is displayed on the display unit 16.

In the example of FIG. 4, in step 4a, the control unit 13 reads information from the EEPROM 15, and in step 4b, sets the initial number of channels (n = 1) and the number of reference channels M, and (4c). In step 4d, the frequency is tuned to check whether data is received in the timer driving state in step 4e. When receiving data in step (4e), the local government (In) is extracted from the data received in step (4f), analyzed, and the service channel is tuned.

In step 4i, the voltage value of the tuned channel is detected to check whether it is high. If it is not high in step (4j), it is checked in step 41 whether the current channel (n) exceeds the number of reference channels (M). If the number of reference channels is less than M, increase the number of channels in process (4k) and repeat the process from (n ← n + 1) and (4c). Check for duplicate areas from the information. When there is no overlapping region in step (4o), if there is no voltage sensing data in step (4o), the alarm through the alarm unit 17 in step (4q), and is displayed to display through the display unit (16).

If the voltage detection value is high in step (4j), the voltage detection value is digitized in step (4q).

This process is progressed until the reference channel number M is reached while going through the steps (4r) and (4x). When the current channel number (m) deviates from the reference channel number (M), it is determined that the region information is a duplicate region in the process (4s).

In the case of overlapping areas in step (4s), the highest value among the voltage detection values (Sn) is selected in steps (4t) to (4w), the area information corresponding thereto is read, the information is analyzed, and the service channel is tuned. In the process of (4e), the data is not received in the process (4Y), and the process proceeds to the completion of the timing in the process (4Y). When the data is not received even when the timing is completed, the number of channels (n) is increased in the process of (4z). Check if (M) is reached. Here, the reference channel scanning mode or alarm is generated according to the presence or absence of the region information Im and the presence or absence of the voltage detection value Sn.

As described above, when the strength of the electric field is detected and the number of reference channels is scanned, when there are two or more overlapping regions with reference channel frequencies, there is an advantage of accurately serving the service by analyzing region information on each reference channel number.

Claims (2)

In the method of frequency banding service channel of a broadband wireless pager, the information recorded in the broadband wireless pager is read to an initial state (n = 1, m = 1, s = 0), and the number of reference channels is M, followed by Fn tuning. A first process of starting timing; a second process of starting timing in the first process and checking whether data is received for a predetermined time; and if the data is not received in the second process and within the set timing, the number of channels (n A third step of checking whether the reference channel number (M) is reached by increasing a), and checking whether there is local information when the reference channel number (M) is not reached in the third step, and checking the regional information (Im). If there is no information, enter the reference channel scanning mode, and if there is region information (Im), there are two or more regions. A fourth step of checking whether there is an output value Sm, a fifth step of displaying an area after analyzing the area information Im which is not detected in the fourth step, and a step of receiving data in the second step Recording information (Im) and increasing order (m, n, s) (m ← m + 1, n ← n + 1, s ← s + 1) to check whether the number of reference channels (M) has been reached. Checking whether the number of tuning channels (M) has reached the reference channel (M) in step 6 and the sixth step, and when it is not reached, the initial state is set and the area information (Im) is analyzed to tune the service channel frequency. After the voltage sensing output value is recorded, the eighth step of confirming that the voltage sensing output value is the maximum by increasing the number of times; and if the tuning time is not within the predetermined period in the eighth step, the next service frequency is tuned and If off, check the service frequency detected voltage and if not, A ninth process of analyzing and displaying the detected, a tenth process of digitizing and recording a detected voltage value of the service frequency in the ninth process and confirming whether it is within a predetermined period, and within a predetermined period of the tenth process. In the ninth process, the next frequency is tuned, and after a predetermined period, the eleventh process of selecting the maximum value of the detected voltage values Sn and reading the corresponding region information Im and analyzing and tuning the corresponding service channel is performed. Service channel frequency scanning method of a broadband pager characterized by a load. A method for frequency banding of a service channel frequency of a broadband wireless pager, the method comprising: a first step of reading recorded information in the broadband pager, initializing it, tuning a corresponding frequency, and driving a timer to check whether data is received; In the second step of waiting for data reception until the reference frequency is reached within the timing at which the data can be continuously received when no data is received in the second step, the service channel frequency is analyzed by analyzing local information when receiving data in the second step. A third step of checking whether the tuned voltage value is tuned and applying the predetermined level or more, and when the number of channels currently tuned when the level is less than or equal to the predetermined level is less than the reference channel number M in the third step. In the fourth step of increasing the number of channels and (nΔ-n + 1) more than the reference number of channels (M), the fourth step of identifying two or more overlapping areas; If there is no voltage detection value in the overlapped area, alarming and analyzing and displaying the regional information, and if the detected value after tuning after the service channel exceeds the predetermined level in the third step, the detected value is digitized and the current scanning channel A sixth step of increasing the next channel number (n) when the number exceeds the reference channel number (M) and not exceeding the number of reference channels (M); and two or more overlapping channels when the reference channel number (M) is exceeded in the sixth step. In the seventh step of tuning the service channel after selecting the highest value when the service is not in service, and increasing the channel frequency when there is no data reception for a predetermined time in the second step, it is greater than the reference channel number (M). 8th step of checking whether there is a small amount and receiving data again when it is small, and checking the presence or absence of area information (Im); Other (Sn) without warning and detection data (Sn) if the service channel frequency of a broadband radio pager characterized by the steps of claim 9 made of an ever performs the sixth step scanning method.