KR20010019649A - Apparatus and method for locating service using dummy pilot pn signal in mobile communication system - Google Patents

Abstract

PURPOSE: The device for tracing a location is provided to use the dummy pilot PN signal, so as to track the location of a mobile station out of a handoff region. CONSTITUTION: Base stations(212,214,216) perform a wireless connection with mobile stations(210), and transmit handoff classification messages to the mobile stations(210) requesting a location tracking service to perform the location tracking service. The first to sixth dummy pilot PN generators(218-228) share timing modules with the base stations(212,214,216) through transmission lines(230), and generate corresponding pilot PN signals. The transmission lines(230) are connected with the base stations(212,214,216) and the first to sixth dummy pilot PN generators(218-228), and transmit timing related signals. The mobile stations(210) analyze the handoff classification messages. If the mobile stations(210) are not located in handoff regions, the mobile stations(210) detect a chip delay of a corresponding dummy pilot PN sequence, and transmit a corresponding delay time to the base stations(212,214,216) according to dummy pilot PN offset information transmitted from the base stations(212,214,216).

Description

Device and method for location tracking using dummy pilot P-en signal in mobile communication system {APPARATUS AND METHOD FOR LOCATING SERVICE USING DUMMY PILOT PN SIGNAL IN MOBILE COMMUNICATION SYSTEM}

The present invention relates to a location tracking device and method in a mobile communication system, and more particularly to a location tracking device and method using a dummy pilot signal.

The components of a mobile communication system can be largely divided into a base station and a mobile station. The base station controls a base station transmission system (hereinafter referred to as a BTS) and a plurality of base station transmission systems that perform radio access between mobile stations and performs call mobility control (Call Mobility Management) related to call processing. It can be classified as a controller (Base Sation Controller: BSC). In addition, the mobile communication system includes a mobile switching center (hereinafter referred to as MSC) that is responsible for transmitting and receiving data and control signals with other communication networks, and a base station manager who is responsible for the operation and maintenance of the entire mobile communication system. Base Station Manager) may be included.

However, one of the hot issues in the past decades in the mobile communication system is the provision of a service that can provide a service for identifying or tracking the location of a mobile station. Such services are commonly referred to as "Location Services". The implementation of these services is expected to have a significant effect when used appropriately in emergency situations such as emergency ambulance dispatch or fire fighting vehicle dispatch. In recent years, the need for a location tracking service of such a mobile communication system is recognized and required. In particular, in the United States, the Federal Communications Commission (FCC) stipulated "FCC Mandate Phase II" legislation, by October 1, 2001, that all wireless carriers in the United States had a 67% chance of a 125m radius. It is required to develop a location tracking service (E-911) by developing a scheme that can be tracked within the tolerance range, thus developing a precise and cost-effective Location Determination Algorithm (hereinafter referred to as LDA). This is urgently needed.

In addition, the location tracking apparatus and method according to the present invention is applicable not only to the above-mentioned emergency situation, but also to all Location-Based services such as Home Zone Service and Yellow Page Service.

On the other hand, as a location tracking scheme disclosed in the recent papers and patents in a mobile communication system, there are a Time Differenc of Arrival method, a Time of Arrival method and an Angel of Arrival method. The methods use trigonometric methods and calculate the position of the mobile station using a chip delay with respect to a forward pilot signal.

That is, the base station generates a reference time of the base station by using a global positioning system (GPS). The mobile station receives a pilot channel signal acquisition, a paging channel, and the like to obtain a reference time and a PN offset value of the base station. The mobile station then measures propagation delay time through analysis of chip delay of the PN sequence of the received pilot signal from the base station.

The TOA method is described below. That is, the mobile station obtains a pilot PN signal from at least three base stations. The mobile station obtains a reference time and a PN offset value of each base station, and compares with the base stations according to propagation delay time (eg, T1, T2, T3, etc.) through analysis of chip delay of each PN sequence. Calculate the distance (eg R1, R2, R3, etc.). When the mobile station transmits it to the base station, the base station draws a rule of a circle centered on the positions of the base stations and the radius of each distance from the mobile station. The base station determines the position where the circles overlap, as the position of the mobile station.

In addition, the TDOA method will be described below. That is, the mobile station obtains a pilot PN signal from at least three base stations. The mobile station then obtains the reference time and PN offset value of each base station. The mobile station determines distances (eg, R1, R2, R3, etc.) from the base stations according to propagation delay time (eg, T1, T2, T3, etc.) through analysis of chip delay of each PN sequence. Calculate When the mobile station transmits it to the base station, the base station determines the difference between the distance between the mobile station and each base station, that is, the rule of the difference between R1 and R2, the rule of the difference between R1 and R3, and the difference between the difference between R2 and R3. The overlapping position is determined as the position of the mobile station.

1 illustrates an example of a TDOA method of calculating a position of a mobile station using a chip delay for a forward pilot signal in a mobile communication system.

The mobile station 110 obtains each pilot PN signal from the first BTS 120 to the third BTS 140. The mobile station 110 obtains the reference time and PN offset value of each base station. The mobile station 110 calculates distances (R1 150, R2 160, and R3 170) from the base stations according to the propagation delay time through the analysis of the chip delay of each PN sequence.

In addition, the TDOA method will be described below. That is, the mobile station obtains a pilot PN signal from at least three base stations. The mobile station then obtains the reference time and PN offset value of each base station. The mobile station determines distances (eg, R1, R2, R3, etc.) from the base stations according to propagation delay time (eg, T1, T2, T3, etc.) through analysis of chip delay of each PN sequence. Calculate

The BSC (not shown) receives the R1 (150) to the R3 (170) from the mobile station 110, and tracks the difference between the R1 (150) and the R2 (160), and R1 (150) and R3 (170). The position at which the rule of difference of the track and the rule of the difference between R2 (160) and R3 (170) overlap is estimated as the position of the mobile station.

However, as described above, the Time Differenc of Arrival (hereinafter referred to as TDOA), the Time of Arrival (hereinafter referred to as TOA), Angel of Arrival (hereinafter referred to as AOA), etc. use a trigonometric method. It is necessary to obtain a pilot PN signal from at least three base stations. However, when the location tracking methods using the trigonometry are applied to a code division multiple access (hereinafter referred to as CDMA) mobile communication system, the methods are known to have excellent performance in the handoff region. Meets FCC Mandate Phase II) It is difficult to locate the mobile station due to the inherent Hearability characteristics of the CDMA mobile communication system. Therefore, there is a need for a location tracking method for the entire CDMA system network including the handoff area and the non-handoff area.

That is, the CDMA mobile communication system performs a power control function to solve the problem of near-far problem. However, due to such a power control function, hearability occurs in the non-hand off area, and thus, the mobile station cannot detect the pilot signal transmitted by neighboring base stations in the non-hand off area.

For example, in a CDMA mobile communication system, a mobile station manages a variety of information about the base station and other base stations with which it is currently registered. In addition, the mobile station receives a neighbor base station list message including PN offset information of each base station through a paging channel, measures the strength of each pilot signal of the neighbor base stations, and makes a reference for handoff. That is, the mobile station manages an active sector, a neighbor sector, a candy sector, and the like. Wherein the active sector corresponds to a base station to which a mobile station is currently transmitting / receiving messages, the neighbor sector corresponds to a base station that may be used for handoff in the future, and the candy date sector is not currently used for data demodulation. Corresponds to a base station with energy large enough to be demodulated. However, as described above, due to the hearability characteristic of the power control in a location other than the handoff area in the CDMA mobile communication system, the mobile station cannot properly detect pilot signals transmitted by neighboring base stations in the non-hand off area. The NAVER and candy date sectors cannot be managed. Also, when a given mobile station is in close proximity to a registered service base station, the received signal strength from the service base station becomes stronger, so that the mobile station can no longer detect the pilot signal transmitted by neighboring base stations.

It is therefore an object of the present invention to provide an apparatus and method for tracking the location of a mobile station in a region other than handoff in a mobile communication system.

Another object of the present invention is to provide an apparatus and method for tracking the location of a mobile station in a region other than a handoff using a dummy pilot PN signal in a mobile communication system.

Another object of the present invention is to check whether a mobile station requesting location service in a mobile communication system is located in a handoff area, and if not located in the handoff area, transmit the corresponding dummy pilot PN offset information to the mobile station. The mobile station detects a chip delay of a corresponding dummy pilot PN sequence, calculates a propagation delay time or distance between itself and each dummy pilot PN generator, and reports it to a base station, and the base station uses a TOA, TDOA, AOA scheme, and the like. To provide an apparatus and method for tracking the location of a mobile station.

Another object of the present invention is to perform a mode of recognizing a dummy pilot PN signal when a mobile station requests a location tracking service from a mobile communication system and receives a message indicating that the mobile station is not located in a handoff area from the mobile communication system. The mobile station detects the chip delay of the corresponding dummy pilot PN sequence, calculates the propagation delay time or distance between itself and each dummy pilot PN generator, reports it to the base station, and the base station uses the TOA, TDOA, AOA method, etc. to locate the mobile station. It is to provide an apparatus and method for tracking the.

Another object of the present invention is to, when a base station receives a request for location service from a mobile station in a mobile communication system, transmits information on whether the mobile station is located in a handoff area to the mobile station, and the mobile station is handoffd. The base station transmits the dummy pilot PN offset information to the mobile station when not located in the area, and the base station receives the distance information between the dummy PN generator and the mobile station from the mobile station to perform location tracking. .

The present invention for achieving the above object is a location tracking device using a dummy pilot P-en signal in a mobile communication system, performing a wireless connection with mobile stations located in its cell and requires a location tracking service A dummy pilot that is provided in a plurality of cells in each cell to generate a corresponding pilot P-N signal by sharing a timing module with the base station through a transmission line and a base station for transmitting and positioning handoff message to the mobile station. The P-N generators, the transmission line connecting the base station and the plurality of dummy pilot P-N generators and transmitting timing-related signals, and analyzing the handoff decision message are located in the handoff area. Otherwise, the dummy pilot P-N offset information transmitted from the base station And a mobile station for detecting a chip delay of the dummy pilot P-N sequence and transmitting a corresponding propagation delay time to the base station.

In addition, the present invention indicates whether a location tracking device using a dummy pilot P-N signal in a mobile communication system is located in a handoff area with a corresponding mobile station requiring location tracking service. A base station for transmitting and tracking dummy pilot P-N offset information to the corresponding mobile station and a timing module are shared with the base station through a transmission line to generate a corresponding pilot P-N signal, and a plurality of cells are provided in each cell. The dummy pilot P-N generators, the transmission line connecting the base station and the plurality of dummy pilot P-N generators and transmitting timing related signals, and if the mobile station is not located in the handoff area, The corresponding dummy file according to the corresponding dummy pilot P-N offset information transmitted. Blood-en features a yirueojim the detection and the propagation delay time of the delay chip sequence as a mobile station for transmitting to the base station.

The present invention relates to a location tracking method using a dummy pilot P-N signal in a mobile communication system, comprising a first step in which a base station transmits a handoff message to a corresponding mobile station requiring a location tracking service. If the user is not located in the handoff region by analyzing the handoff collision message, the chip delay of the corresponding dummy pilot P-N sequence is detected and corresponding to the corresponding dummy pilot P-N offset information transmitted from the base station. And a third step of transmitting a propagation delay time to the base station, and a third step of the base station tracking the position of the corresponding mobile station based on the propagation delay time.

The present invention relates to a method for tracking a location using a dummy pilot P-N signal in a mobile communication system, comprising: a first step of informing whether a base station is located in a handoff area to a corresponding mobile station requiring a location tracking service; If the mobile station is not located in the handoff region, the mobile station detects a chip delay of the dummy pilot P-N sequence and transmits the propagation delay time to the base station according to the dummy pilot P-N offset information transmitted from the base station. And a third step of the base station tracking the location of the corresponding mobile station based on the corresponding propagation delay time.

The present invention relates to a method for tracking a location using a dummy pilot P-N signal in a mobile communication system, comprising: a first step of informing whether a base station is located in a handoff area to a corresponding mobile station requiring a location tracking service; If the mobile station is not located in the handoff area, the second step of the base station transmitting the dummy pilot P-N offset information to the corresponding mobile station, and the base station between the dummy pilot P-N generator and the mobile station. On the basis of the propagation delay time information, characterized in that the third step of tracking the location of the mobile station.

In addition, the present invention provides a location tracking method using a dummy pilot P-N signal in a mobile communication system, the first step of the mobile station requesting a location tracking service, and the mobile station receiving a handoff message from the base station. A second step of checking whether the mobile station is located in the handoff area; and if the mobile station is not located in the handoff area, recognizing a dummy pilot P-N signal according to corresponding dummy pilot P-N offset information transmitted from the base station. Performing a mode to detect a chip delay of the dummy pilot P-N sequence, and report propagation delay time information between the dummy pilot P-N generator and the mobile station to the base station; And a fourth step of tracking the location of the corresponding mobile station based on the time information. It shall be.

1 is a diagram illustrating an example of a TDOA method for calculating a position of a mobile station using a chip delay for a forward pilot signal in a mobile communication system.

2 is a diagram illustrating a configuration according to an embodiment of the present invention in a mobile communication system.

3 is a flowchart illustrating a location tracking method using a dummy pilot signal according to an embodiment of the present invention in a mobile communication system.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed descriptions of related well-known functions or configurations are omitted when it is determined that the detailed description may unnecessarily obscure the subject matter of the present invention.

When the mobile station requests the location service and receives a message from the mobile communication system that it is not located in the handoff area, the mobile station performs a mode of recognizing a dummy pilot PN signal. The mobile station detects a chip delay of the dummy pilot PN sequence, calculates a propagation delay time or distance between itself and each dummy pilot PN generator, and reports it to the base station. This allows the base station to track the location of the mobile station using TOA, TDOA, AOA schemes, and the like.

When a location tracking service is requested from a mobile station, the base station according to the present invention transmits information on whether the mobile station is located in a handoff area in a handoff classification message. If the mobile station is not located in the handoff area, the base station transmits the dummy pilot PN offset information to the mobile station. The base station receives the distance information between the dummy PN generator and the mobile station from the mobile station and performs location tracking.

2 is a diagram illustrating a configuration according to an embodiment of the present invention in a mobile communication system.

To implement the location tracking service in the mobile communication system, the cost side should be considered. There may be GPS Based Solution and Network Based Solution for location tracking of mobile station. However, in the case of the GPS Based Solution, the number of mobile stations that are currently subscribed to is enormously burdened when implementing a location tracking service. Thus, the present invention provides a network based solution by minimal modification of the system, and shares a timing module necessary for implementing additional devices required with the base station.

As shown, FIG. 2 shows a 1FA / 3Sector BTS system. In the embodiment of FIG. 2, two dummy PN generators are added to each sector. However, this is an embodiment of the present invention, which is applicable to both 2FA system and OMNI system, and the number of dummy PN generators per cell or sector is variable.

The first BTS 212 is connected to the first dummy PN generator 218 to the sixth dummy PN generator 228 connected through the transmission line 230. In addition, the dummy PN generators connected to the second BTS 214 and the third BTS 216 are omitted from the drawings for convenience of description. In addition, operations related to the second BTS 214 and the third BTS 216 are the same as those of the first BTS 212 to be described later, and thus will not be described.

The first BTS 216 provides a reference time through the wireline 230 so that the first dummy PN generator 218 to the sixth dummy PN generator 228 can generate and wirelessly output the pilot PN signal. In this case, the first BTS 216 shares a timing module such as an oscillator and a GPS receiver.

The first dummy PN generator 218 to the sixth dummy PN generator 228 are devices for generating corresponding pilot PN signals, respectively, and may have the following design specifications. That is, the dummy PN generator is assigned a pilot PN different from the pilot PN of the first BTS 212 and the pilot PN of the neighbor BTS. As a result, the dummy PN generator does not generate a pilot signal having the same pilot offset as the pilot signal generated in the first BTS 212 and the neighbor BTS. At this time, each dummy PN generator may follow the PN index rules previously promised with the corresponding BTS. Each dummy PN generator shares a timing module with the first BTS 212 to receive a reference time. In addition, an optical fiber may be used as an interface between each dummy PN generator and the first BTS 212 in consideration of a transmission speed and a loss. That is, the transmission line 230 may be the optic fiber. Each dummy PN generator can consist of at least a PN generator, an IF / RF converter and an antenna.

When the mobile station 210 performs a general operation and needs a location service, the mobile station 210 transmits a location service request message according to the present invention to the mobile communication system. The mobile station 210 performs LDA by checking information of a handoff classification message received from the mobile communication system, and recognizes a dummy pilot PN signal when it is determined that the mobile station 210 is not located in the handoff area. Perform

That is, the mobile station 210 transmits the location service request message, examines the handoff classification message transmitted from the BSC 232, and if the mobile station 210 is not located in the handoff area, the corresponding dummy pilot. The chip delay of the corresponding dummy pilot PN sequence is analyzed according to the PN offset information to calculate a distance between the mobile station 210 and each dummy pilot PN generator.

When the BSC 232 receives a location service request message such as an E-911 call request from the mobile station 210, the BSC 232 determines whether the mobile station 210 is in the handoff area or the handoff area. It checks whether or not, and transmits a handoff classification message to the mobile station 210 to inform the mobile station 210 of the location of the handoff area. In this case, a check criterion for being located in the handoff area of the BSC 232 may be offset information and strength information of each pilot PN signals currently received by the mobile station 210. .

For example, the BSC 232 examines the information transmitted from the mobile station 210, and if there is more than one predetermined pilot PN signal with strength above a predetermined threshold, the mobile station 210 is located in the handoff area. You can judge. The BSC 232 may determine that the mobile station 210 is not located in the handoff area when there is one predetermined pilot PN signal having an intensity exceeding the predetermined threshold.

The mobile station 210 then checks the handoff credit message received after transmitting the location service request message. And if the mobile station 210 is located in the handoff area, the mobile station 210 performs the same operation as the conventional location tracking.

For example, the mobile station 210 can propagate the delay time by analyzing the chip delay of the PN sequence of neighboring base stations (eg, the second BTS 214 and the third BTS 216, etc.) having strengths exceeding the corresponding thresholds. Measure The mobile station 210 then reports this to the BSC 232. The BSC 232 can then estimate the location of the mobile station 210 using the TOA method, the TDOA method, or the AOA method.

On the other hand, if the BSC 232 does not determine that the mobile station 210 is located in the handoff region, the dummy pilot PN generators corresponding to the handoff decision message, that is, the first dummy pilot PN generator in the case of FIG. 218 and the PN offset information of the second dummy pilot PN generator 220 may be included. In this case, for example, the BSC 232 may check the service pilot PN signal corresponding to the mobile station 210 to obtain the dummy pilot PN offset information.

The mobile station 210 determines that the mobile station 210 is not located in the handoff area by checking the handoff collision message, and performs a mode of recognizing a dummy pilot PN signal. That is, the mobile station needs to acquire the PN offset information of the predetermined pilot channel signal from the base station, but can recognize the predetermined pilot channel signal.

The mobile station 210 detects PN offset information of corresponding dummy pilot PN generators included in the handoff notification message. When the mobile station 210 is not located in the handoff region, the mobile station 210 includes corresponding dummy pilot PN offset information included in a handoff classification message transmitted from the BSC 232. In FIG. The chip delay of the corresponding dummy pilot PN sequence is analyzed according to the dummy pilot PN offset information of the pilot generator 218 and the second dummy pilot generator 220 to calculate a distance between the mobile station 210 and each dummy pilot PN generator.

The mobile station 210 then transmits the calculated respective distances to the BSC 232. The BSC 232 may estimate the position of the mobile station 210 using the TOA method, the TDOA method, or the AOA method for each of the calculated distances.

3 is a flowchart illustrating a location tracking method using a dummy pilot signal according to an embodiment of the present invention in a mobile communication system. A description with reference to FIG. 2 is as follows.

If the mobile station 210 requests the location tracking service in step 312, the BSC 232 checks whether the mobile station is located in the handoff area in step 314. In step 316, the BSC 312 transmits the corresponding handoff classification message to the mobile station 210. In this case, the criterion for checking whether the mobile station is located in the handoff region may be offset information and strength information of each pilot PN signals received by the mobile station 210. The information may be included in the location service request message of the mobile station 210, or may be transmitted to the BSC 232 by another procedure transmitted to the predetermined BSC in addition to the message. Also, for example, the BSC 232 examines the information transmitted from the mobile station 210 and, if there are two or more predetermined pilot PN signals with strengths above a predetermined threshold, the mobile station 210 is located in the handoff area. You can judge that. The BSC 232 may determine that the mobile station 210 is not located in the handoff area when there is one predetermined pilot PN signal having an intensity exceeding the predetermined threshold.

In step 316, the BSC 232 transmits the corresponding handoff classification message to the mobile station 210 to inform whether the mobile station 210 is located in the handoff area. If the BSC 232 determines that the mobile station 210 is not located in the handoff region, the BSC 232 includes corresponding dummy pilot PN offset information according to the present invention in the corresponding handoff classification message. In addition, the dummy pilot PN offset information may be obtained by the BSC 232 checking a pilot PN signal currently being serviced by the mobile station 210, and set at the time of designing a mobile communication system in response to the obtained pilot PN signal. . In addition, the dummy pilot PN offset information is not the same as the offset of the pilot PN signal generated in the surrounding BTS.

When the mobile station 210 performs a general operation and requires an emergency rescue request, the mobile station 210 transmits a location service request message in step 312. In step 318, the mobile station 210 checks the handoff classification message according to the present invention from the BSC 232 to check whether it is located in the handoff area. If the mobile station 210 is located in the handoff area, the mobile station 210 performs the same operation as the conventional location tracking in step 320.

For example, the mobile station 210 measures the pilot PN propagation delay time from each base station by analyzing the chip delay of the PN sequence of neighboring base stations having an intensity exceeding a corresponding threshold, and the mobile station 210 and each base station Calculate the distance between them. The mobile station 210 can then report this to the BSC 232. Accordingly, the BSC 232 estimates the position of the mobile station 210 using the TOA method, the TDOA method, or the AOA method with respect to the calculated distance between the mobile station 210 and the respective base stations.

On the other hand, if it is not located in the handoff region in step 318, the mobile station 210 detects the corresponding dummy pilot PN offset information transmitted from the BSC (232) in step 322, the mode to recognize the dummy pilot PN signal Perform. This is because the mobile station must recognize the PN offset information of the predetermined pilot channel signal from the base station, but can recognize the predetermined pilot channel signal. That is, the mobile station 210 recognizes the corresponding dummy pilot PN signal in software only when it is not located in the handoff area during the location service.

In step 324, the mobile station 210 analyzes the chip delay of the dummy pilot PN sequence, calculates the distance between the mobile station 210 and the corresponding dummy pilot PN generation period, and transmits it to the BSC 232. In operation 326, the BSC 232 estimates the position of the mobile station 210 using the TOA method, the TDOA method, or the AOA method for each of the calculated distances.

2 to 3, the apparatus and method for location tracking using the dummy pilot PN signal according to an embodiment of the present invention in the mobile communication system, if the mobile station is not located in the handoff area during the location tracking service, the mobile station is located in the dummy. Operate in the mode of recognizing the pilot PN signal. As a result, the mobile station detects a chip delay of the corresponding dummy pilot PN sequence, calculates a propagation delay time or distance between itself and each dummy pilot PN generator, reports the propagation delay time or distance to the base station, and reports the base station to the mobile station that is not located in the handoff area. Location tracking can be performed.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention can use the dummy pilot PN signal in the mobile communication system to track the location of the mobile station in a non-handoff area, and can accurately track the location of the mobile station in the entire mobile communication network. have. In addition, dummy pilot PN generators that are additionally implemented in a cell managed by each base station share a timing module with the base station, and thus, there is an advantage that a cost reduction effect can be achieved in implementing additional devices required.

Claims (33)

In the position tracking device using a dummy pilot P-en signal in a mobile communication system, A base station that performs wireless access with mobile stations located in its cell and transmits a handoff notification message and performs location tracking to a corresponding mobile station requiring a location service; Dummy pilot P-N generators which share a timing module with the base station through a transmission line to generate a corresponding pilot P-N signal, and are provided in plural in each cell; The transmission line connecting the base station and the plurality of dummy pilot P-N generators and transmitting a timing related signal; If the user is not located in the handoff region by analyzing the handoff collision message, the chip delay of the corresponding dummy pilot P-N sequence is detected and corresponding to the corresponding dummy pilot P-N offset information transmitted from the base station. And a mobile station for transmitting a propagation delay time to the base station. The method of claim 1, wherein the handoff messaging message, And a dummy pilot P-N signal in a mobile communication system, wherein information on whether the corresponding mobile station is located in a handoff area is provided. 3. The method of claim 2, wherein the criteria for whether the corresponding mobile station is located in a handoff area is And a dummy pilot P-N signal in a mobile communication system, characterized in that determined by each pilot P-N offset information and strength information received by the corresponding mobile station. The method of claim 3, wherein the plurality of dummy pilot P-en generators provided in each cell, A location tracking device using a dummy pilot P-N signal in a mobile communication system, characterized in that a pilot signal having a pilot upset identical to a pilot signal generated by neighboring base stations is not generated. The method of claim 4, wherein the plurality of dummy pilot P-N generators provided in the plurality of cells, Positioning apparatus using a dummy pilot P-en signal in a mobile communication system comprising a P-en generator, an intermediate frequency / radio frequency converter and an antenna. The method of claim 5, wherein the dummy pilot P-N offset information transmitted from the base station, It may be obtained by examining a pilot P-N signal currently being serviced to the corresponding mobile station, and the dummy pilot P-P in the mobile communication system characterized in that it is set in advance in designing a mobile communication system corresponding to the obtained pilot P-N signal. Position tracking device using the yen signal. In the position tracking device using a dummy pilot P-en signal in a mobile communication system, A base station for transmitting a location of the dummy pilot P-en offset information to the corresponding mobile station if the mobile station is located in the handoff area to the corresponding mobile station requesting location service; , Dummy pilot P-N generators which share a timing module with the base station through a transmission line to generate a corresponding pilot P-N signal, and are provided in plural in each cell; The transmission line connecting the base station and the plurality of dummy pilot P-N generators and transmitting a timing related signal; If it is not located in the handoff area, detecting the chip delay of the dummy pilot P-N sequence according to the dummy pilot P-N offset information transmitted from the base station and transmits the propagation delay time to the base station. Position tracking device using a dummy pilot P-N signal in a mobile communication system characterized in that the mobile station. 8. The method according to claim 7, wherein the check criteria for whether the corresponding mobile station is located in a handoff area, And a dummy pilot P-N signal in a mobile communication system, characterized in that determined by each pilot P-N offset information and strength information received by the corresponding mobile station. The method of claim 8, wherein the plurality of dummy pilot P-en generators provided in each cell, A location tracking device using a dummy pilot P-N signal in a mobile communication system, characterized in that a pilot signal having a pilot offset equal to a pilot signal generated by neighboring base stations is not generated. 10. The method of claim 9, wherein the plurality of dummy pilot P-N generators provided in each cell at least, Positioning apparatus using a dummy pilot P-en signal in a mobile communication system comprising a P-en generator, an intermediate frequency / radio frequency converter and an antenna. 11. The method of claim 10, wherein the dummy pilot P-N offset information transmitted from the base station, It may be obtained by examining a pilot P-N signal currently being serviced to the corresponding mobile station, and the dummy pilot P-P in the mobile communication system characterized in that it is set in advance in designing a mobile communication system corresponding to the obtained pilot P-N signal. Position tracking device using the yen signal. In the location tracking method using a dummy pilot P-en signal in a mobile communication system, A first step of the base station transmitting a handoff messaging message to a corresponding mobile station requiring a location service; If the corresponding mobile station analyzes the handoff collision message and is not located in the handoff region, the chip delay of the corresponding dummy pilot P-N sequence according to the corresponding dummy pilot P-N offset information transmitted from the base station. Detecting and transmitting the propagation delay time to the base station; And a third step of the base station tracking the position of the corresponding mobile station based on the corresponding propagation delay time. 13. The method of claim 12, wherein the handoff messaging message is And a method for determining whether the corresponding mobile station is located in a handoff area. 14. The method of claim 13, wherein the criteria for whether the corresponding mobile station is located in a handoff area is And a dummy pilot P-N signal in a mobile communication system, characterized in that determined by each pilot P-N offset information and strength information received by the corresponding mobile station. The method of claim 14, wherein the dummy pilot P-N offset information is, Position tracking method using a dummy pilot P-en signal in a mobile communication system, characterized in that the offset information of the dummy pilot P-en signal generated from a plurality of dummy pilot P-en generators provided in each cell. The method of claim 15, wherein the plurality of dummy pilot P-en generators provided in each cell, 12. A method of tracking a location using a dummy pilot P-N signal in a mobile communication system, wherein a pilot signal having a pilot offset equal to a pilot signal generated by neighboring base stations is not generated. The method of claim 16, wherein the corresponding dummy pilot P-N offset information transmitted from the base station, It may be obtained by examining a pilot P-N signal currently being serviced to the corresponding mobile station, and the dummy pilot P-P in the mobile communication system characterized in that it is set in advance in designing a mobile communication system corresponding to the obtained pilot P-N signal. Position tracking method using yen signal. In the location tracking method using a dummy pilot P-en signal in a mobile communication system, A first step of informing whether a base station is located in a handoff area to a corresponding mobile station requiring a location service; If the mobile station is not located in the handoff area, the base station detects a chip delay of the corresponding dummy pilot P-N sequence according to the dummy pilot P-N offset information transmitted from the base station and sets the propagation delay time to the base station. A second step of transmitting by And a third step of the base station tracking the position of the corresponding mobile station based on the corresponding propagation delay time. 19. The method according to claim 18, wherein the check criteria for whether the corresponding mobile station is located in a handoff area, And a dummy pilot P-N signal in a mobile communication system, characterized in that determined by each pilot P-N offset information and strength information received by the corresponding mobile station. 20. The apparatus of claim 19, wherein the dummy pilot P-N offset information is: Position tracking method using a dummy pilot P-en signal in a mobile communication system, characterized in that the offset information of the dummy pilot P-en signal generated from a plurality of dummy pilot P-en generators provided in each cell. The method of claim 20, wherein the plurality of dummy pilot P-en generators provided in each cell, 12. A method of tracking a location using a dummy pilot P-N signal in a mobile communication system, wherein a pilot signal having a pilot offset equal to a pilot signal generated by neighboring base stations is not generated. 22. The method of claim 21, wherein the dummy pilot P-N offset information transmitted from the base station is: It may be obtained by examining a pilot P-N signal currently being serviced to the corresponding mobile station, and the dummy pilot P-P in the mobile communication system characterized in that it is set in advance in designing a mobile communication system corresponding to the obtained pilot P-N signal. Position tracking method using yen signal. In the location tracking method using a dummy pilot P-en signal in a mobile communication system, A first step of informing whether a base station is located in a handoff area to a corresponding mobile station requiring a location service; If the mobile station is not located in the handoff area, the base station transmits the dummy pilot P-N offset information to the mobile station; The base station performs a third step of tracking the position of the mobile station based on the propagation delay time information between the corresponding dummy pilot P-N generator and the mobile station, the dummy pilot P-N signal in the mobile communication system Location tracking method using. 24. The method of claim 23, wherein the criteria for checking whether the corresponding mobile station is located in a handoff area is And a dummy pilot P-N signal in a mobile communication system, characterized in that determined by each pilot P-N offset information and strength information received by the corresponding mobile station. The method of claim 24, wherein the dummy pilot P-N offset information is Position tracking method using a dummy pilot P-en signal in a mobile communication system, characterized in that the offset information of the dummy pilot P-en signal generated from the plurality of dummy pilot P-en generators provided in each cell. The method of claim 25, wherein the plurality of dummy pilot P-en generators provided in each cell, 12. A method of tracking a location using a dummy pilot P-N signal in a mobile communication system, wherein a pilot signal having a pilot offset equal to a pilot signal generated by neighboring base stations is not generated. 27. The apparatus of claim 26, wherein the dummy pilot P-N offset information transmitted from the base station is: It may be obtained by examining a pilot P-N signal currently being serviced to the corresponding mobile station, and the dummy pilot P-P in the mobile communication system characterized in that it is set in advance in designing a mobile communication system corresponding to the obtained pilot P-N signal. Position tracking method using yen signal. In the location tracking method using a dummy pilot P-en signal in a mobile communication system, A first step in which the mobile station requires location services; A second step of the mobile station receiving a handoff collision message from a base station and checking whether the mobile station is located in a handoff area; When the mobile station is not located in the handoff region, the mobile station performs a mode of recognizing a dummy pilot P-N signal according to the dummy pilot P-N offset information transmitted from the base station, thereby performing chip delay of the dummy pilot P-N sequence. Detecting a signal and reporting propagation delay time information between the dummy pilot P-N generator and the mobile station to the base station; And a fourth step of the base station tracking the position of the corresponding mobile station based on the propagation delay time information. 29. The method of claim 28, wherein the handoff messaging message is And a dummy pilot P-N offset information in the mobile communication system, comprising information on whether the mobile station is located in a handoff region and the corresponding dummy pilot P-N offset information. 30. The method of claim 29 wherein the criteria for whether the mobile station is located in a handoff area is And a dummy pilot P-N signal in the mobile communication system, characterized in that determined by each pilot P-N offset information and strength information received by the mobile station. The method of claim 30, wherein the dummy pilot P-N offset information is, Position tracking method using a dummy pilot P-en signal in a mobile communication system, characterized in that the offset information of the dummy pilot P-en signal generated from the plurality of dummy pilot P-en generators provided in each cell. 32. The method of claim 31, wherein the plurality of dummy pilot P-en generators provided in each cell, 12. A method of tracking a location using a dummy pilot P-N signal in a mobile communication system, wherein a pilot signal having a pilot offset equal to a pilot signal generated by neighboring base stations is not generated. 33. The apparatus of claim 32, wherein the dummy pilot P-N offset information transmitted from the base station is: The dummy pilot P-N in a mobile communication system, which may be obtained by examining a pilot P-N signal currently being serviced by the mobile station, and is preset at the time of designing a mobile communication system in response to the obtained pilot P-N signal. Position tracking method using signal.