KR100362163B1 - Analysis method of service coverage in wireless communication system - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a service coverage analysis method in a wireless communication system and a computer readable recording medium having recorded thereon a program for realizing the method.

2. The technical problem to be solved by the invention

The present invention realizes a service coverage analysis method and method for improving call quality by accurately analyzing which base station (or repeater) a call quality measuring point is receiving service and service coverage of a base station (or repeater). To provide a computer-readable recording medium that records a program for the purpose.

3. Summary of Solution to Invention

The present invention provides a method for analyzing a base station (or repeater) coverage in a wireless communication system, comprising: a first step of collecting call quality measurement data through a measuring device; An analyzer selects any record of the call quality measurement data introduced from the measuring unit, and matches a pseudo noise (PN) code of the corresponding point within a predetermined radius from the corresponding point indicated by the coordinate value of the selected record. Or a second step of checking whether there is a pseudo noise (PN) code of a repeater); And a third step of visually connecting the corresponding point to which the pseudo noise (PN) code matches the base station (or repeater) in a line according to the test result of the second step.

4. Important uses of the invention

The present invention is used for service coverage analysis and the like in a wireless communication system.

Description

Analysis method of service coverage in wireless communication system

The present invention relates to a service coverage analysis method for analyzing a service coverage of a base station in a coverage analysis system, and a computer-readable recording medium having recorded thereon a program for realizing the method.

Explosive acceptance of subscribers since the start of commercially available digital cellular services (DCS) and personal communications services (PCS), as well as future wireless services such as wireless local loop (WLL) and IMT-2000 (or FPLMTS) It is increasing.

When a wireless communication service provider wants to install a plurality of base stations in each area in order to guarantee call quality, a cell planner designing a callable area that each base station can cover is performed. In accordance with such cell planning, efforts will be made to improve call quality in the shadow area by expanding base stations, installing optical micro-cells, and adjusting hand-off parameters.

Typically, call quality measurements rely on out-door measurements.

The method of measuring call quality in the out-door uses a numerical road map used by a GPS (GPS) receiver and a vehicle navigation system. More specifically, the out-door measurement method measures by having a measurement agent mount a GPS receiver in a vehicle and move around a selected area for cell planning. At this time, the GPS receiver tracks the location where the vehicle moves to provide the tracked vehicle location information, and maps and records the call quality measured through the terminal measured at each moved location to the absolute location of the numerical road map. By repeating the operation, a call quality measurement is performed for the area selected for cell planning.

In the mobile communication system, the final mobile communication service to a subscriber is a base station, and a subscriber can receive service from a base station when in a cell composed of one base station. The problem is solved in turn. Therefore, in order to improve the call quality of mobile communication, it is necessary to understand which base station the call quality measurement point receives.

However, conventionally, in order to know from which base station the measurement point is serviced, the service base station was estimated using a Pseudo Noise (PN) code of the measurement data.

However, in a code division multiple access (CDMA) mobile communication system, soft handoff is supported so that a subscriber receives services from a plurality of base stations at the same point.

In order to know all the base stations serving the subscriber, it is necessary to analyze the Common Air Interface (CAI) message.

However, since the CAI message includes a lot of information other than the PN information, it cannot be directly used for coverage analysis of the base station.

In addition, the urban area is severely interfered with the feature, and often receives the service of the far base station without the service of the nearby base station. In such a case, it is difficult to determine where the base station located is serviced using only the PN code.

In addition, the PN code alone cannot determine which of the relay and the base station provide the service.

Accordingly, in order to improve call quality, a method for accurately analyzing a base station of which a call quality measurement point receives service and a service coverage of a base station is required.

In order to solve the above problems, the present invention improves call quality by accurately analyzing which base station (or repeater) a call quality measuring point is receiving service and service coverage of a base station (or repeater). It is an object of the present invention to provide a service coverage analysis method and a computer readable recording medium recording a program for realizing the method.

1 is an exemplary configuration diagram of a coverage analysis system to which the present invention is applied.

2 is a flowchart of an embodiment of a service coverage analysis method according to the present invention;

3 is an explanatory diagram showing a result of service coverage analysis according to an embodiment of the present invention;

* Explanation of symbols for the main parts of the drawings

10: measuring instrument 20: analyzer

30: Geographic Information Database

According to an aspect of the present invention, there is provided a method for analyzing a base station (or repeater) coverage in a wireless communication system, the method comprising: collecting call quality measurement data through a measuring device; An analyzer selects any record of the call quality measurement data introduced from the measuring unit, and matches a pseudo noise (PN) code of the corresponding point within a predetermined radius from the corresponding point indicated by the coordinate value of the selected record. Or a second step of checking whether there is a pseudo noise (PN) code of a repeater); And a third step of visually displaying the corresponding point where the pseudo noise (PN) code matches the base station (or repeater) by a line according to the test result of the second step.

In addition, the present invention, if there is no pseudo noise (PN) code, according to the test result of the second step, the predetermined radius and the pseudo noise (PN) code of the corresponding point within the extended radius arbitrarily extended And a fourth step of visually displaying the base station (or repeater) having a matching pseudonoise (PN) code by connecting the corresponding point in a line.

The present invention for achieving the above object, the base station (or repeater) for coverage analysis, a coverage analysis system having a processor, comprising: a first function of collecting call quality measurement data through a meter; An analyzer selects any record of the call quality measurement data introduced from the measuring unit, and matches a pseudo noise (PN) code of the corresponding point within a predetermined radius from the corresponding point indicated by the coordinate value of the selected record. Or a second function for checking whether there is a PN code of a repeater); And a program for performing a third function of visually displaying the corresponding point where the pseudo noise (PN) code matches the base station (or repeater) by line according to the test result of the second function. Provide a recording medium.

Further, according to the test result of the second function, when there is no pseudo noise (PN) code, the pseudo radius corresponding to the pseudo noise (PN) code of the corresponding point within the extended radius is arbitrarily extended by the predetermined radius. A computer readable recording medium having recorded thereon a program for adding a fourth function of visually displaying a base station (or repeater) having a noise (PN) code by connecting the corresponding point in a line.

In the present invention, an effective mobile communication call quality is improved by analyzing the coverage serviced by the base station.

The effect of the present invention is divided into two parts.

The first is to analyze at which base station the measured point is served, and the second is to analyze the service coverage of the base station.

Base station coverage analysis can show the quality of service of each base station by showing propagation environment parameters together, and can only improve the call quality improvement task by finding the call quality degradation area of the boundary between base stations. Can be taken. It is easy to grasp the degradation of call quality caused by overlapping coverage of one base station with another base station by connecting the base station that provides service to the measuring point in a straight line. Can be.

Through the present invention, by analyzing not only the strongest best active PN (PN with excellent signal to interference ratio (Ec / Io)) but also all active PNs, it is possible to design efficient mobile communication cells by analyzing PN mixture and coverage overlap. You can see how far the coverage (weak signal strength) of each base station is affected.

In addition, the present invention makes it possible to manage the service coverage by the repeater by connecting the service repeater and the measurement point when the measurement point receives the service from the repeater.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an exemplary configuration diagram of a coverage analysis system to which the present invention is applied. In the drawings, "10" represents a measuring instrument, "20" represents a tool, and "30" represents a geographic information database.

The measurer 10 collects measurement data (quality information, coordinate information, time information) for a call quality measurement region and provides the analyzer 20 with the measurement data.

In this case, the main processor in the measuring device 10 sets the absolute coordinates of the current position provided from the GPS receiver as a starting position and measures the direction information and acceleration provided from the respective direction sensors and the acceleration sensors. The relative distance at which the terminal or the system body moves is calculated using the information, and the coordinates of the moved position are tracked by adding the calculated relative distance to the movement start position. At this time, the position coordinate tracked when measuring the call quality of the wireless section in the out-door area means the relative position coordinate moved from the absolute start position coordinate.

In addition, the main processor receives a parameter of a wireless communication signal received by the terminal at a predetermined time interval, for example, every 1 second. Therefore, the moved position every one second interval is set to the wireless section call quality measurement position.

In addition, the coordinate values of the measurement position set by the main processor and the parameter values provided from the terminal at the measurement position are mapped to each other and stored in a table form. This process can be performed repeatedly to extract the parameters used to measure the call quality over the wireless section at various locations within a specific area of the out-door.

In addition, the call quality measurement table (measurement data) stored by the main processor may be stored in a storage medium, for example, a flash memory, a hard disk, or transmitted to the analyzer 20 in real time.

The measuring device 10 can be used as a portable diagram that a measurer can carry on the vehicle and carry the wireless section call quality, or can be fixedly placed and operated in an area where the call quality of the wireless section needs to be intensively checked. It can also be used for fixing purposes.

In case of fixed use, it is necessary to know the absolute coordinate value of the fixedly arranged measuring position. Therefore, the GPS receiver is interfaced through the spare port of the main processor to determine the absolute coordinate of the fixedly arranged position, The call quality measured at this coordinate is mapped and stored in the storage medium.

The analyzer 20 has a radius in an arbitrary record of the measurement data (quality information + coordinate information + time information) imported from the measuring instrument 10 (which is an arbitrary point since it has coordinate values), Can be varied according to the PN value of the base station within 4Km (in the case of the city, but about 10Km in the mountainous area) can be easily drawn by drawing a matching PN and line.

That is, the analyzer 30 may visually show which base station service each record of call quality measurement data receives using the geographic information database 30 as shown in FIG. 3, thereby facilitating coverage analysis. have.

PN types include Best Active PN and 6 Active PNs having excellent signal-to-interference ratio (Ec / Io), and PN values of base stations around an arbitrary measurement point are different.

The present invention largely analyzes the serving base station of the measurement point in the following two methods.

The first is to show the best active PN at the measurement point on the map, and the second is to analyze the top 5 PN codes with good signal to interference ratio (Ec / Io) at the measurement point. Both methods can be used at the same time and can intuitively know the multiple base stations providing the service.

The top five PN codes can be analyzed together with Ec / Io, terminal reception power, terminal transmission power, terminal transmission power control signal, and frame error rate to determine the service quality status of the base station and determine the improvement direction of the radio environment.

The present invention enables a straight line (or a dashed-dotted line and a dashed-dotted line) between a measurement point and a corresponding service base station to effectively analyze base station coverage of an area where the service coverage of the base station is determined by the terrain and features rather than the distance between the base station and the terminal, such as downtown. ) (See FIG. 3). In this case, when the measuring point receives the service from the optical repeater, it is connected to the optical repeater to analyze the service coverage of the optical repeater.

For example, a straight line between the measurement point and the base station (a dashed line or a dashed dashed line, etc.) may be used to distinguish sectors of the base station by color and to distinguish between Best Active PN, 2 ^nd PN, and 3 ^rd PN in the form of a straight line.

The best active PN is the PN having the best signal-to-interference ratio (Ec / Io), and the active 1 ^st (Best) to 6 ^th PN indicate the service coverage area of the base station.

2 is a flowchart illustrating a service coverage analysis method according to the present invention.

As shown in FIG. 2, in the service coverage analysis method according to the present invention, first, measurement data (including quality information, coordinate information, and time information) are collected from the measuring device 10 and transmitted to the analyzer 20 in real time. (202).

Thereafter, the analyzer 20 generates a random radius (a random point in any record of the measurement data (quality information + coordinate information + time information) imported from the measuring instrument 10 (which is an arbitrary point because it has a coordinate value). Preferably, the PN value of the base station in the downtown area of 4Km and the mountainous area of about 10Km is queried (203) and analyzed whether there is a matching PN value (204).

As a result of the analysis, if there is a matching PN, the base station of the PN and an arbitrary point are displayed as lines (205). In step 205, the PN is analyzed to determine whether there is a matching PN value within the extended radius. As such, any radius can vary depending on the propagation environment.

As described above, the present invention can analyze which base station the measured point is receiving service or the service coverage of the base station.

Base station coverage analysis can show the quality of service of each base station by showing propagation environment parameters together, and can perform the call quality improvement task by finding the call quality degradation area of the boundary between base stations. Can be. It is easy to grasp the degradation of call quality caused by overlapping coverage of one base station with the coverage of another base station by connecting to base station that provides service as a measuring point. Can be.

Through the present invention, by analyzing not only the strongest best active PN (PN having excellent signal-to-interference ratio (Ec / Io)), but also all active PNs, it is possible to design efficient mobile communication cells by analyzing PN mixture and coverage overlap. In addition, it is possible to determine how far the coverage (weak signal strength) of each base station extends.

In addition, when the measurement point receives a service from a repeater other than the base station, the service coverage by the repeater can be managed by connecting the service repeater and the measurement point.

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.).

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains, and the above-described embodiments and accompanying It is not limited to the drawing.

As described above, the present invention can analyze which base station or repeater is serviced by a particular point, and can effectively analyze the coverage serviced by the base station or repeater, thereby contributing to the improvement of mobile communication call quality. There is.

Claims (11)

In the base station coverage analysis method in a wireless communication system, A first step of collecting call quality measurement data through a measuring device; The analyzer selects any record of the call quality measurement data introduced from the measuring unit, and matches a pseudo noise (PN) code of the corresponding point within a predetermined radius from the corresponding point indicated by the coordinate value of the selected record. A second step of checking for a PN code; And According to the inspection result of the second step, a third step of visually displaying by connecting the base station and the base station to which the PN code matches with a line Service coverage analysis method in a wireless communication system comprising a. The method of claim 1, According to the test result of the second step, when there is no pseudo noise (PN) code, the pseudo noise corresponding to the pseudo noise (PN) code of the corresponding point within the extended radius is arbitrarily extended by the predetermined radius. A fourth step of visually connecting the base station having the PN) code and the corresponding point by a line; Service coverage analysis method in a wireless communication system further comprising. In the repeater coverage analysis method in a wireless communication system, A first step of collecting call quality measurement data through a measuring device; The analyzer selects any record of the call quality measurement data introduced from the measuring device, and selects a record of the repeater that matches the pseudo noise (PN) code of the corresponding point within a predetermined radius from the corresponding point indicated by the coordinate value of the selected record. A second step of checking for a PN code; And A third step of visually displaying the point where the pseudo noise (PN) code is matched by connecting the repeater with a line according to the test result of the second step Service coverage analysis method in a wireless communication system comprising a. The method of claim 3, wherein According to the test result of the second step, when there is no pseudo noise (PN) code, the pseudo noise corresponding to the pseudo noise (PN) code of the corresponding point within the extended radius is arbitrarily extended by the predetermined radius. A fourth step of visually displaying the repeater having the PN) code by connecting the corresponding point with a line; Service coverage analysis method in a wireless communication system further comprising. The method according to any one of claims 1 to 4, The analyzer, And analyzing the service coverage of the base station or the repeater and the base station or the repeater. The method of claim 5, The coverage analysis process, By showing the radio environment parameters together, it is possible to inquire the quality of service of each base station or repeater, find the call quality degradation area between the base stations or the relay period, and perform the call quality improvement work, and provide the service to the measuring point. The service coverage analysis method of the wireless communication system characterized in that it is easy to grasp the degradation of call quality caused by overlapping coverage of one base station or repeater with another base station or repeater by connecting to a base station or repeater in a line. . The method of claim 6, The call quality measurement data, Substantially, service coverage analysis method in a wireless communication system comprising the quality information, coordinate information, time information. For a base station coverage analysis, a coverage analysis system having a processor, A first function of collecting call quality measurement data through a meter; The analyzer selects any record of the call quality measurement data introduced from the measuring unit, and matches a pseudo noise (PN) code of the corresponding point within a predetermined radius from the corresponding point indicated by the coordinate value of the selected record. A second function of checking for a PN code; And A third function for visually displaying by connecting a corresponding point to which a pseudo noise (PN) code and a base station are in line according to a test result of the second function A computer-readable recording medium that records a program to make a computer. The method of claim 8, According to the test result of the second function, when there is no pseudo noise (PN) code, the pseudo noise (PN) code that matches the pseudo noise (PN) code of the corresponding point within the extended radius by arbitrarily extending the predetermined radius ( A fourth function for visually displaying by connecting the base station having the PN) code and the corresponding point by a line; A computer readable recording medium having recorded thereon a program for adding more data. For a base station coverage analysis, a coverage analysis system having a processor, A first function of collecting call quality measurement data through a meter; The analyzer selects any record of the call quality measurement data introduced from the measuring device, and selects a record of the repeater that matches the pseudo noise (PN) code of the corresponding point within a predetermined radius from the corresponding point indicated by the coordinate value of the selected record. A second function of checking for a PN code; And A third function of visually displaying the point where the pseudo noise (PN) code is matched by connecting a repeater with a line according to a test result of the second function; A computer-readable recording medium that records a program to make a computer. The method of claim 10, According to the test result of the second function, when there is no pseudo noise (PN) code, the pseudo noise (PN) code that matches the pseudo noise (PN) code of the corresponding point within the extended radius by arbitrarily extending the predetermined radius ( PN) 4th function to visually display by connecting the corresponding point to the repeater with a line A computer readable recording medium having recorded thereon a program for adding more data.