KR100274134B1 - Method of paging control in wide area wireless pager - Google Patents

Abstract

PURPOSE: A method for controlling a call receive in a broad band pager is provided to perform a setup of a receive channel easily, and to perform a region recognition control operation easily and quickly by using region shift confirmation data for transmitting a region code representing a region shift. CONSTITUTION: When a power is turned on, a CPU sets up an original registration region channel as a receiving channel(51,52). When a region shift confirmation data is detected(55), a region code in the region shift confirmation data is stored(57). And, it is decided whether a specific message data is existed in a message region or not, because the region shift confirmation data may be in a control data region(58). If there is the message data, an alarm is driven, and a present state is shifted into a receive standby state(60). If there is no message data, the present state is shifted into the receive standby state directly(60). It is decided whether a region shift is generated by receiving a call signal or not(61). If the region shift is generated, it is decided whether an operation mode of a broad band pager is an auto mode or a manual mode or not(57). When the operation mode of a broad band pager is the auto mode, the receive channel is changed, and a call signal receive is stood by in a region channel(66,67). At this time, the receive channel is the region channel pertinent to the region code of the stored region shift confirmation data. When the call signal receive is performed through a call change channel(68), the call change channel is set up as the receive channel because the region shift is finished(70).

Description

Method of controlling call reception in wide area pager

1 is a hardware configuration diagram of a wide area pager.

2 is a flowchart of a call reception control method of a conventional wide area pager.

3 is an explanatory diagram of reception error occurrence in the border area.

4 is a radio call signal data format diagram.

5 is a flowchart of a call reception control method according to an embodiment of the present invention.

The present invention relates to a call reception control method in a wide area wireless pager, and more particularly, to a call reception control method for preventing a reception error in a boundary area and allowing a user to quickly recognize a location when moving to another area.

In general, a wide area pager refers to a wireless pager configured to receive continuous calling service in the moved other area as in the original registered area even when the user moves out of the originally registered service area.

A configuration of such a wide area pager, a call reception control method, and a concept of a wireless call reception error in a boundary area of a conventional wide area pager will be described with reference to FIGS. 1 to 3.

1 is a block diagram of a wide area pager.

As shown in the figure, the wide-area pager includes a receiver 11 which receives a radio call signal from a base station on a reception channel determined by a predetermined local oscillation frequency, and automatically moves a region moved when a region movement occurs. A control unit 12 for manually recognizing a user's key operation and outputting a control signal for controlling the reception state of the receiving unit 11, and receiving the control signal from the control unit 12 and receiving the receiving unit 11 accordingly. The PLL synthesizer 13, which provides a local oscillation frequency for changing the reception state of the < RTI ID = 0.0 >) < / RTI > to the receiver 11, and stores channel information and region codes of all regions. When the control function for recognizing the moved area is performed, the memory unit 14 provided to the controller 12 is basically provided.

The controller 12 internally includes a decoder 15 and a CPU 16. The CPU 16 reads channel information and region codes of all regions stored in the memory unit 14 when a region movement occurs. A reception change control signal for setting a reception state of the reception unit 11 for each channel is provided. In addition, if there is a radio call signal input under the changed reception state, the user detects the area code contained in the signal and compares it with the area code read from the memory unit 14. At the same time, it recognizes that the area has been moved and controls to receive the radio calling service signal in the recognized current area.

The decoder 15 is enabled by the control signal of the CPU 16 after the CPU 16 recognizes the region, decodes the radio call signal through the receiver 11, and detects its address, and then the message information in the signal. To the CPU 16.

The call reception control procedure of the wide area wireless pager is shown in FIG. 2. Referring to the drawings, the processing procedure will be described in detail as follows.

First, in order to perform a wide area service, the wide area priority pager stores the channel information of all regions and the information of all regions (region ID codes) in advance in the memory unit 14.

When the power is applied and the pager is driven, the parameters of each function unit including the CPU 16 are initialized (20). Initially, the reception channel is fixed to the local channel of the registered service area to receive radio call information (21).

If the paging information is received from the initially set channel and the radio call signal is not detected at the receiving channel at some point, it may be caused by a deafness or a failure of a base station or a situation in which the user moves the area. If it is determined that the movement has occurred (22), it is determined whether the area recognition mode is set automatically or manually by the operation switch unit of the pager (23).

As a result of the determination, if it is set automatically, the region-specific channel information and corresponding region information (ID code) stored in the memory unit 14 are read in a predetermined order and set in the CPU 16, and the PLL synthesis unit (13) is controlled to tune to the channel read from the memory unit 14 (25, 26). The wireless call signal is detected by the read local channel (27). When the wireless call signal is detected, the region ID code, which is the region information in the wireless call signal, is extracted and matched with the region ID code read from the memory unit 14. (28).

As a result of the survey 28, if the region ID code does not match, the process returns to step 25 of reading the next channel according to a predetermined sequence, and if the region ID code matches, the region is moved to the current region to which the user has moved. The receiver changes the reception state so as to receive the radio call service in the newly determined region and waits for signal reception (31, 32).

On the other hand, if the radio call signal is not detected in the changed local channel as a result of the survey 27, the next channel information and the region ID code according to the region are applied to repeatedly detect whether the radio call signal is detected. However, even after a certain period of time set to check the channels of all regions, if the detection of the radio call signal is not continued (29), this is because the wide pager is not located in the area but is located in a hearing loss area or because of a base station failure. Because the situation is caused, the display unit indicates that the signal cannot be received, and returns to the original (30) to receive to the fixed local channel before determining as the local movement.

On the other hand, as a result of the determination in the determination step 23, if the operation mode for area recognition is manually specified by the operation switch unit, the user recognizes the area designated by himself / herself as the current area that has moved (24). In step 32, the reception channel is changed to a channel used in the region, and the state immediately changes to the state of waiting for radio call information in the new region.

After recognizing the area automatically or manually as described above, and changing the reception channel to the new area channel, the receiver 15 checks whether the synchronization code in the radio call signal is detected by the decoder 15 while waiting to receive (33). If the sync code is detected, the address information in the frame following the sync code is extracted to check whether it is its own address (35). If it matches the own address, it is the case that it calls itself. The message information is received and processed to display alarm sounds and call information through driving of the driving unit and the display unit (36,37), and to return to step 33 of checking whether or not a sync code is detected to receive another signal.

However, if the synchronization code is not detected for a certain time, it is determined whether the local movement is made (34), and if the local movement has not occurred, the process returns to the step 33 of checking whether the synchronization code has been detected. Return to step 23 for determining the zone selection mode. Further, even if the sync code is detected, if the address in the frame is not its own address, the process returns to step 33 for determining whether the sync code is detected for the next signal reception.

Here, the wide area pager having the above-described configuration and call reception control method as the basic configuration is a case where the radio call signal transmitted from the radio call transmission system has a data format (see FIG. 4A) according to the POCSAG protocol.

Recently, a radio call data format using a new protocol has been proposed to transmit radio call signals at high speed and to provide various additional services. This is called a FLEX protocol, and is required to receive and process radio call signals by FLEX. In Fig. 1, an A / D converter 17 provided between the receiver 11 and the decoder 15 should be added. Since the A / D converter 17 is an analog signal having 4 levels or 2 levels of the FLEX data through the receiver 11, the A / D converter 17 performs a function for converting it into 2-bit digital data.

In addition, since the radio call signal by the FLEX protocol is transmitted with more various additional service data than the POCSAG protocol radio call signal, the reception control method of the radio call signal by the FLEX protocol is a procedure for processing various additional services. Although the reception method for processing the POCSAG signal described above is different, the call reception control procedure for performing the wide area function is basically the same.

However, when such a wide area pager is located in a boundary area between regions in which a mobile call signal transmitted by a base station of a moved area and an adjacent area exists at the same time when the user moves the area, the wide area pager is called in the adjacent area. There is a problem in that a signal may be received, and accordingly, an error of incorrectly determining a region in which the user is currently located through detection of region information of another adjacent region may occur.

This will be described in detail with reference to FIG. 3 as follows.

FIG. 3 is a view for explaining occurrence of reception errors in a border area, in which A, B, C, and D are areas providing services through different channels, and 41 to 45 are border areas between areas. Represents an area where radio call signals overlap.

For example, if a user of any wide area pager is originally registered to receive service, and this user moves to Region C, he or she will temporarily be assigned to Zone 42, the boundary between Regions B and C. It will be located in District 44, the boundary between Regions C and D, or in District 45, the boundaries of Regions B and C.

At this time, according to the conventional wide area wireless call reception control method described above, since the local movement has occurred, the CPU 16 reads the channel information of all regions and applies them one by one to change the reception channel of the device. However, if the user is located in the 42 zone, the wide area pager detects the radio call signal when the reception status is changed to the channel of the area B, and recognizes the 8 areas indicated by the area information on the channel as the current location that the user has moved. can do. Thus, the wide area pager fixes the reception channel to the local area B. Accordingly, since the user has already informed the telecommunications company that the area to which he is moving is the local area C, the radio call signal is transmitted to the channel of the local area C. Nevertheless, as described above, the wide area pager is fixed to receive the B channel, which causes a problem of not receiving its own call signal. The same reception error occurs in the remaining boundary areas as well.

One method has been proposed to solve this problem. In this case, when the user's regional movement occurs, the wide area pager finds all the channels through which the call signal is received and recognizes the channels with the strongest channel strength as the channel of the region.

However, even in such a method, when the electric field strength of the adjacent area channel is stronger than the moving destination area in the border area, the reception error still remains, which does not fundamentally solve the reception error in the border area. There is this.

On the other hand, the transmission system that transmits the call signal to the conventional wide area pager described above has been divided into two operation channels for each service area. That is, each region has a 'reference channel' and a 'service channel', and the reference channel transmits a call signal for calling the general pager users registered in the region, and the service channel transmits a wide area wireless calling service for the region. It is designed to transmit a call signal for calling subscribers and subscribers of a wide area calling service that has been moved from another region.

The reason for assigning and operating two kinds of call channels in one area is as follows.

First of all, we need to look at the 'region code' detected by the wide area pager in Korea. When a subscriber subscribes to a wireless calling service in a specific area, a unique terminal address is assigned to the subscriber. This terminal address is transmitted along with a message (caller's contact number, text message, etc.) when the call signal is transmitted. When the terminal receives the call signal, the terminal compares the address, and if it is the same as its own address, recognizes that the message transmitted together is its own and is given to receive the message. At this time, the carrier provides an address combining the two-digit code in front of the address for subscriber address management, and the two-digit code indicates the region originally registered by the subscriber. The wide area pagers detect this code from the call signal of the moving area and recognize the area.

If only one type of paging service channel is allocated to each service area in this environment, what kind of problem occurs in the area recognition operation of the wide area pager?

First, if the explanation is based on the Seoul area for convenience, the subscriber who entered Seoul from Chungcheong area is called 'A' and the subscriber who enters Seoul from Gangwon area is called 'B'.

When the subscriber 'A' has moved from the Chungcheong area to Seoul, the terminal of the subscriber 'A' receives an arbitrary call signal transmitted from the Seoul area, detects only the region code contained in the call signal, and then detects the region. Recognize that the area is Seoul area. In addition, the telecommunications service provider sends a signal to call the subscriber 'A' from the Seoul area as requested by the subscriber 'A' before moving to the area, so that the subscriber 'A' can receive the wireless calling service in the Seoul area instead of the originally registered area. Will be.

However, when subscriber 'B' registered in the Gangwon region has moved to Seoul later than subscriber 'A', the terminal of subscriber 'B' receives the call signal on the calling channel of Seoul area as the subscriber 'A' terminal. To detect the area code. In this case, it is fortunate to receive a call signal for calling a subscriber registered in the Seoul area, but since only one call channel is allocated in the Seoul area, a call signal for calling another subscriber 'A' is also present in the same frequency channel. Subscriber 'B' may receive a signal for calling subscriber 'A'. When receiving the call signal calling subscriber 'A' and the terminal 'B' detects the area code, the detected area code is the area code added to the terminal address of the subscriber 'A'. It is a region code indicating the Chungcheong region, which is the registered region of 'A', and thus a terminal error of the subscriber 'B' terminal does not recognize the current region as Seoul, but as the Chungcheong region.

Therefore, in order to eliminate this error, Korea's wide area wireless calling system operates two kinds of calling channels in service area. That is, the call channel is separated and operated by dividing the channel (reference channel) for calling only the subscribers registered in the region and the channel (service channel) for calling the subscribers moving from other regions. Accordingly, when a subscriber's terminal moving from another region moves to a region, only the wireless calling subscribers registered in that region synchronize with the received reference channel to detect the region code. The reception tuned to the service channel (service channel) to ensure that there is no confusion. Therefore, each wide area pager should store both reference channel information and service channel information that are operated by region, and it is cumbersome, but the operator's wide area calling system also allocates and operates two calling channels per region.

This is very complicated operation at the system level, and even at the terminal level, it is inevitable to take the problem of complex channel tuning control procedure or channel information storage management procedure for local recognition after moving the region. .

Accordingly, the present invention has been made to solve the problem of receiving error in the boundary area of the wide area wireless calling system of our country and the complexity of separating and operating two types of channels in one service area. Provides a method for controlling call reception in a wide area wireless pager that can continuously receive a wireless call service stably without a reception error of a wireless call signal even when moving to a border area, and to eliminate the trouble of operation control due to complex channel operation. Its purpose is to.

In order to achieve this object, the present invention is configured as follows.

First, looking at the root causes of the existing problems raised in the present invention, the error of the boundary area, the separate operation of the complex channel at the system level and the control procedures for the terminal-level complex channel information storage management and area recognition accordingly The reason is that the area code used by the wide area pager to recognize the area is detected by the area code on the radio calling channel of the moved area. That is, the reception error in the border area occurs because the wide area pager receives the call channel of the wrong area adjacent to the border area and detects the area code in the call channel. When only the service channel of is operated, it does not receive the call signal of the local subscriber, but receives the call signal of the other local subscriber who has moved and detects the area code from the signal. In this case, since the local radio pager is moved, the method of detecting the area code through the reception of the call channel received in the moved area is the source of the problem. Therefore, the regional radio call is detected in a different way. If you do, the problem will be solved.

To this end, the present invention is not a conventional method in which the regional radio pager takes the area code for area recognition, but when the subscriber calls the telecommunications operator's calling system before reporting the area, the area call is reported. According to the report, the calling system sent the area code of the area that the subscriber reported as the moving destination to provide to the wide area wireless pager, and the wide area pager saved the area code sent by the calling system immediately after the area movement report. The region is recognized as the region indicated by the stored region code, and the calling channel of the recognized region is changed to the receiving channel.

In this case, even if located in the boundary area of the moving area, it is possible to prevent a reception error in the boundary area because it does not detect the area code by receiving the mixed call channel in the boundary area. In addition, there is no need to separate and operate the channel in the area because it is not necessary to enter the moved area and receive the call channel (reference channel) in the area and use the area code detected in the received channel. You lose. In addition, if only one type of service channel is operated in a region, the wide area pager naturally needs only one channel information per region, which simplifies the control operation for storing and managing channel information, and scans all stored channels when moving to a region. Instead, the channel corresponding to the area code provided by the system can be immediately changed to the reception channel, thereby simplifying the control operation for changing the channel at any time and performing the quick control operation.

Based on this technical concept, the present invention, when a subscriber's local mobile report is received, the calling system confirms data containing a region code of a mobile destination by calling the subscriber's regional wireless pager (hereinafter, referred to as 'local mobile confirmation data'). To transmit. In addition, when the regional mobile confirmation data is received, the wide area pager stores the local mobile confirmation data, and when the local mobile transfer occurs, the area indicated by the local mobile confirmation data is not changed while applying the reference channel information of all the stored areas. Only the channel information of is applied to change the receiving channel.

In addition, the subscriber who owns any wide area wireless pager does not have to be provided with the wireless calling service in one type of service channel like the subscriber in the area after moving to the area. Therefore, only one type of service channel is operated in the service provider's calling system. In addition, the channel information stored by the wide area wireless pager stores and manages only one type of service channel information for each premise region.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

4A and 4B are data format diagrams of a radio call signal according to a signal transmission method, FIG. 4A is a data format diagram of a radio call signal using a POCSAG protocol, and FIG. 4B is a radio call signal using a FLEX protocol. The data format diagrams are respectively shown.

In order to implement the present invention, first, the radio call signal to be transmitted must include local mobility confirmation data. And the movement confirmation data transmitted by the calling system should contain at least the region ID code of the region that the user has declared to move. However, since the POCSAG signaling system does not include such data, the present invention decides to put this data in the message area of the codeword of the POCSAG signal, which has a message attribute but adds a special code before the data. Do not display the wide pager on the display after receiving a message.

In addition, in the case of a radio call signal based on the FLIX protocol, so-called "SECURE MESSAGE" data is included in the signal, and this data is recommended to be located in a vector field and a message field. Therefore, in the present invention, when the radio call signal is a FLEX protocol signal, such "SECURE MESSAGE" data may be used. And of course, the present invention is not limited to using only "SECURE MASSAGE" as data for confirming the regional movement. In other words, in the radio call signal by the FLEX protocol, any data can be used in the present invention as long as there is data carrying a code of a region to be moved by the user.

On the other hand, when a local movement report is received from the subscriber at the transmission system of the telecommunication service provider that transmits the wireless call signal, the wireless call signal is transmitted to the transfer channel at the same time as the home channel for a predetermined period of time. Since this is an invocation method, a detailed explanation of how to implement it is avoided.

Now, the call reception control method of the present invention under the premise of the wireless call environment will be described with reference to FIG. 5.

5 is a flowchart illustrating a call reception control method of a wide area pager according to an embodiment of the present invention.

When the power is applied, the wide area pager initializes the number of components including the CPU 16, sets the original registered area channel (hereinafter referred to as home channel) as a reception channel, and waits for reception of a radio call signal. Transition to state (51, 52). In operation 53, if the wireless call signal is received, it is determined whether a magnetic address is detected. If a magnetic address is detected, the terminal recognizes itself as a call signal and checks whether local movement confirmation data is detected (55).

If the area movement confirmation data is not detected, the message data is read and displayed on the display unit, and an alarm is driven to notify the reception of the message, and then the process returns to the reception standby state 52 (56). However, when the area movement confirmation data is detected (55), the user recognizes that the area will be moved, stores the area code included in this data, and displays the area movement occurrence on the display to notify the user (57).

In case of call signal coded by FLEX signaling method, local movement confirmation data is not sent to the message area but sent to the control data area such as "SECURE MESSAGE" area. (58) If the message data is present, it is displayed on the display and the alarm is driven and the state transitions to the reception waiting state 60. If the message data does not exist, only the local movement confirmation data is transmitted, and thus the reception waiting state 60 is immediately performed. To transition to.

The reception wait state 60 is a reception state fixed by the home channel, and waits for a call signal to be received in this state. Then, it is determined whether local movement occurs (61).

In this case, if the call signal is not detected for a predetermined period of time with the set reception channel, the local movement is determined as the local movement or the deafness region.

As a result of the determination (61), if the user's local movement does not occur, it is determined whether a call signal is received (62), and when the call signal is received, the message data is displayed and the user is informed through an alarm drive, and then the reception standby state (60). Return to).

If it is determined that the local movement of the user has occurred, the determination 61 determines whether the operation mode of the wide area pager is automatic or manual (57). If it is set to the manual mode, the reception channel is fixed to the channel of the region designated by the user's operation setting key operation (65), and the receiver receives the call signal from the region channel (60).

When the auto mode is set, the call signal is received on any channel while changing the receiving channel only for the local channel indicated by the area code in the home channel and the previously stored local movement confirmation data (hereinafter referred to as a call transfer channel). It is determined whether or not (66,67).

In such a state, it is determined which channel the call signal is input to, and when a signal is received through the transfer channel (68), it recognizes that the user's local movement is completed and sets the receiving channel as the transfer channel (70). It is checked whether the address carried in the radio call signal is its own address (71). However, if the signal is not received through the call transfer channel and the signal is received through the home channel, the process immediately proceeds to determining whether the address of the received wireless call signal is its own address without changing the reception channel (69, 70).

As a result of judging whether the magnetic address is detected (71), if the magnetic address is not detected, the state transitions to the reception standby state 74, and if the magnetic address is detected, it is checked whether the local movement confirmation data is detected (72). If the local movement confirmation data is detected, the process shifts to step 57 for processing. If the local movement confirmation data is not detected, the message data in the radio call signal is read and displayed on the display unit, and the user is notified through alarm driving. (73) Transition to the reception standby state (74).

Therefore, the present invention is applied to a wide area wireless calling system that allocates and operates a single call channel without separate operation of two call channels in one service area in the call system, and calls a area code for local recognition. By using the local movement confirmation data transmitted after the local movement report in, the call channel of the precisely moved region can be set as the receiving channel without changing the channels of all regions in order as in the prior art. The control operation can be performed simply and quickly, and the local call channel for storage management can be monotonized, thereby reducing the memory capacity of the terminal.

In addition, when the local movement occurs, only the channel of the region indicated by the home channel and the regional movement data is set as the reception channel, so that an error caused by receiving the channel of the adjacent region may be prevented even if the channel is stayed in the boundary region.

Claims (5)

Applied to a wide area wireless calling system that allocates and operates a single type of call service channel for each service area, and controls the call reception of a wide area pager that stores the single type of call service channel information for each area as change channel information related to area movement. A method, comprising: a first step of setting a registered local channel (hereinafter, referred to as a home channel) of a wide area radio pager as a reception channel and waiting to receive a radio call signal; Checking whether area movement confirmation data is detected from the wireless paging system, and if the area movement confirmation data is detected, recognizing that the user will move the area, and storing the area code included in the data; Determining whether local movement occurs while maintaining a fixed reception state with a home channel; If it is determined that a regional movement has occurred, a fourth step of waiting for a radio calling service by changing a reception channel to the single type of call service channel indicated by the regional movement confirmation data; Receive control method. The method of claim 1, wherein, after performing the third step, when the operation mode for region recognition is set to the manual mode, the call service channel of the region designated by the user by operating the operation setting key of the device is fixed as a reception channel. And receiving a radio call signal. 2. The call reception control of the wide area pager according to claim 1, wherein the area code in the area movement confirmation data received in the second step is an area code of a region which the subscriber has declared as a moving destination to the wide area wireless calling system. Way. [4] The wide area pager of claim 3, wherein the reception of the area movement confirmation data in the second step detects the data contained in the message area in the codeword when the data protocol transmitted is POCSAG. Call reception control method. [5] The wide area according to claim 3, wherein the reception of the regional movement confirmation data in the second step detects the corresponding data in either the vector field or the message field when the transmitted data protocol is FLEX. Call reception control method of a pager.

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