KR101951742B1 - Method and Apparatus for optimize field quality - Google Patents

Abstract

The present invention relates to an apparatus and method for optimizing a field quality, which is divided into a plurality of cells in a coverage area, and a base station apparatus is installed in each cell, Collects and stores the configuration information, extracts a field quality defect area using the field quality measurement information collected from the terminals existing in the plurality of cells, and extracts the location information, the beam information And a control target antenna for eliminating a field quality deficiency factor based on the configuration information, and controls the beam of the selected antenna so that the field quality optimization can be efficiently performed.

Description

FIELD OF THE INVENTION [0001]

The present invention relates to a field quality optimization apparatus and method capable of minimizing a field quality defective area by extracting a field quality defective area such as a shade area or an interference area and thereby controlling an antenna of a base station in providing a mobile communication service .

Mobile communication refers to a wireless communication technology that enables continuous communication regardless of the location and time of a user and assures the mobility of the user.

The mobile communication system for this purpose divides the coverage area into cells of small size in order to solve the limited radio resource, the attenuation characteristic of the radio wave depending on the distance, and the limited power problem of the user terminal, In addition, a user terminal located in an area of each cell is configured to communicate with a base station of the corresponding cell, and this structure enables local reuse of frequency and power reduction.

However, depending on the characteristics of the radio wave and the influence of the surrounding environment, in actual construction of the mobile communication system, unlike the design, the area where the quality due to the interference between adjacent cells deteriorates and the shaded area where the radio wave transmitted from the base station does not reach Lt; / RTI >

Therefore, in order to secure the quality of the mobile communication service, there is a need for a field quality optimization technique to minimize quality defective areas such as shaded areas and interference areas.

In order to optimize the field quality, it is basically necessary to extract the quality defective area through the field measurement and to perform repair work to solve the cause of the quality defect. In the repair work, defective due to lack of service coverage, In case of poor quality due to interference, complementary works were done to eliminate interference factors.

However, since the extraction and repair work of the poor quality area has been performed almost by hand, there has been a problem that a lot of manpower and time are consumed.

Particularly, when inter-cell signal interference occurs, a method of finding an optimized case by repeating a process of performing quality measurement again after changing an output or a service direction of a corresponding base station antenna to eliminate a signal interference factor Therefore, it causes a lot of resource input, and the efficiency of the work is also lowered.

Therefore, there is a need for a method for efficiently performing field quality optimization.

Korean Patent No. 10-1389173, Apr. 18, 2014. Registration (name: wireless network optimization method considering traffic effect)

The present invention proposes efficient field quality optimization in a mobile communication system. The present invention collects and stores position information, beam information, and configuration information of an antenna installed in each of a plurality of cells, The field quality measurement information to be collected is mapped with the feature information to extract a field quality defective area, and the field quality defective element is eliminated based on the position information, beam information, and configuration information about the antenna around the defective area And to provide a field quality optimization apparatus and method by controlling the beam of a selected antenna.

As a means for solving the above-mentioned problems, the present invention provides a method of collecting and storing feature information of a service target area, Collecting and storing location information, configuration information, and beam information of the plurality of base stations; Collecting field quality measurement information measured from a plurality of terminals existing in the service area and location information of the plurality of terminals; Mapping the field quality information to the feature information on the basis of the position information of the plurality of terminals to derive a field quality map indicating a field quality state of each service area; Extracting at least one field quality defective area in the service target area based on the field quality map; And generating the antenna control information of the corresponding base station apparatus for optimizing the field quality based on the configuration information and the beam information of the base station apparatus adjacent to the extracted field of poor quality quality and controlling the base station apparatus .

In the field quality optimization method according to the present invention, the controlling step may control at least one of a directivity angle, a tilting angle, a beam width, a gain, a beam pattern, a vertical sector separation, and a horizontal sector separation At this time, the traffic of the base station apparatus may be checked, and if the traffic exceeds a predetermined threshold, control may be performed to perform at least one of the vertical sector division or the horizontal sector division.

In addition, the field quality optimization method according to the present invention may further comprise: after the step of controlling, collecting field quality measurement information in the field of poor field quality; And a step of determining the field quality of the field quality defective area based on the collected field quality measurement information and performing the control step again if the field quality is not good.

According to another aspect of the present invention, there is provided a wireless communication system including a storage unit for storing feature information of a service area, location information of a plurality of base stations located in the service area, configuration information, and beam information; An information collecting unit for periodically or non-periodically collecting field quality measurement information measured from a terminal located in the service area; And mapping the collected field quality measurement information to the feature information to derive a field quality map indicating a field quality state of the service target area, analyzing the field quality map to extract a field quality defect area, And a field quality control unit that controls the base station apparatus adjacent to the quality defective area to optimize the field quality through beam adjustment of the base station apparatus.

The field quality control unit may control at least one of a directivity angle, a tilting angle, a beam width, a gain, a beam pattern, a vertical sector separation, and a horizontal sector separation for the antenna of the corresponding base station apparatus The base station apparatus may check the traffic of the base station apparatus and control the base station apparatus to perform at least one of vertical sector division or horizontal sector division when the traffic exceeds a preset threshold value.

In addition, the field quality control unit checks the field quality measurement information in the field quality defective area through the information collection unit, and repeats the control of the corresponding base station apparatus until the field quality of the field defective area becomes good .

In a mobile communication system in which a service area is divided into a plurality of cells and a base station device is provided for each cell to cover the corresponding cell area, The field quality map for the service target area is derived by mapping the measurement information, thereby efficiently extracting the field quality defective area, and further, the location information, the configuration information, and the beam information of the base station located in the service target area The field quality can be improved by controlling the antenna beam of the adjacent base station apparatus in the field quality defective area.

Particularly, the present invention automates the field quality optimization process including the field quality measurement, the field quality defective area derivation, and the antenna control, thereby efficiently performing the field quality optimization without wasting excessive resources and time.

In addition, in performing field quality optimization, the present invention performs vertical sector separation or horizontal sector separation according to the topographic information and traffic conditions of a service target area together with position information, configuration information, and beam information of a base station The field quality optimization can be efficiently performed.

FIG. 1 is a view for schematically explaining a structure of a mobile communication system.
2 (a) and 2 (b) are diagrams illustrating a field quality poor state appearing in a mobile communication system.
3 is a diagram illustrating a mobile communication system to which the field quality optimization apparatus according to the present invention is applied.
4 is a flow chart illustrating the operation of the field quality optimization apparatus according to the present invention.
5 is a diagram illustrating a beam control state for optimizing field quality according to the present invention.
6 is a block diagram of a field quality optimization apparatus according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description and the accompanying drawings, detailed description of well-known functions or constructions that may obscure the subject matter of the present invention will be omitted. It should be noted that the same constituent elements are denoted by the same reference numerals as possible throughout the drawings.

The terms and words used in the present specification and claims should not be construed to be limited to ordinary or dictionary meanings and the inventor is not limited to the concept of terminology for describing his or her invention in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present.

Also, terms including ordinal numbers such as first, second, etc. are used to describe various elements, and are used only for the purpose of distinguishing one element from another, Not used. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component.

In addition, when referring to an element as being "connected" or "connected" to another element, it means that it can be connected or connected logically or physically. In other words, it is to be understood that although an element may be directly connected or connected to another element, there may be other elements in between, or indirectly connected or connected.

Also, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. It is also to be understood that the terms such as " comprising " or " having ", as used herein, are intended to specify the presence of stated features, integers, It should be understood that the foregoing does not preclude the presence or addition of other features, numbers, steps, operations, elements, parts, or combinations thereof.

The present invention relates to a field quality optimization technique in a mobile communication system. Prior to description thereof, the field quality poor state in a mobile communication system and a mobile communication system to which the present invention is applied will be described.

FIG. 1 is a view for schematically explaining a structure of a mobile communication system.

As shown in FIG. 1, a mobile communication system is a wireless communication system capable of ensuring mobility of a user. The mobile communication system includes a plurality of access networks 10 to which a user's terminal is wirelessly connected, And a core network 20 connected to the external network 30.

The plurality of access networks 10 are implemented in a plurality of base station apparatuses 11 arranged in each cell 10a that divides a service area and performs wireless communication with a terminal of a user existing in the corresponding cell.

Here, the base station apparatus 11 may be a base station (BS), a base transceiver station (BTS), a NodeB, and an eNodeB. The plurality of access networks 10 may include a base station controller (BSC) Radio Network Controller). ≪ / RTI >

The base station apparatus 11 includes an RF signal processing function, a physical layer (PHY) function, a medium access control (MAC) layer function, a radio link control (RLC) function, Layer function, Packet Data Convergence Protocol (PDCP) layer function. The RF signal processing function is processing for RF signals such as transmission and reception of RF signals, filtering, amplification, analog-to-digital conversion, and digital-analog conversion. The PHY layer function includes a bit stream The MAC layer function includes automatic repeat-reQuest (ARQ), logical channel mapping, radio resource allocation, QoS control function for ensuring QoS to be negotiated for each radio bearer, transmission to the PHY layer The RLC layer function is used for determining whether to apply ARQ, segmentation, in-order deliver, dividing a packet received in the PDCP for transmission over a wireless link, Re-ordering and retransmitting of packets, and the PDCP layer is capable of efficiently transmitting IP packets over the wireless link Performing header compression, AS security (ciphering and integrity protection), and to which includes a packet re-ordering and retransmission during the handover.

In order to solve the problems of increase in cell size and increase in construction and operation cost due to an increase in the number of cells, the access network 10 transmits the above-described base station functions to a digital unit (hereinafter referred to as DU) (Hereinafter referred to as " RU "). For example, the RU has only an RF signal processing function and is installed in an area of each cell 10a. The DU can concentrate the RF signal at a predetermined position and perform the rest of the base station functions (for example, the PHY layer function, the MAC layer function, Layer function, and PDCP layer function).

Next, the core network 20 connects the plurality of access networks 10, and connects the plurality of access networks 10 to an external network 30 such as an IP Multimedia Subsystem (IMS) network or an Internet network And to do the role.

Specifically, the core network 20 is a network system that performs main functions for mobile communication services such as mobility control and switching between the access networks 10, and performs circuit switching or packet switching And manages and controls the packet flow. In addition, the core network 20 manages inter-frequency mobility and further performs billing, authentication, and subscriber management.

The core network 20 includes a Serving GateWay (SGW), a PGN (Mobile Switching Center), a Mobile Switching Center (MSC), a Home Location Register (HLR), a Mobile Mobility Entity (MME) .

In the above-described mobile communication system, the size and shape of each cell 10a may differ from each other depending on the geographical or wireless environment, and the beam information and configuration information of the antenna of the base station apparatus 10 may be the size And the area of the cell 10a in accordance with the influence of the adjacent cell.

However, since the geographical or radio environment of each cell 10a may vary, as shown in Figs. 2 (a) and 2 (b), various field quality poor zones 13, 14a, 14b and 14c exist do. In FIGS. 2A and 2B, reference numerals 11a, 11b, and 11c denote base station apparatuses, and reference numerals 12a, 12b, and 12c denote antenna beams of the base station apparatuses 11a, 11b, and 11c. At this time, the field quality defective areas 14a, 14b, and 14c indicate shaded areas generated by the radio waves of the respective base stations 11a, 11b, and 11c not reaching, The antenna beams of the devices 11a and 11b overlap each other and are generated by interference.

Particularly, as shown in FIG. 2 (b), the field quality defective area 14c due to the shaded area can also occur in the vertical direction according to the altitude difference between the antenna beam and the building, It appears mainly in the environment.

The present invention collects and stores the location information, beam information, and configuration information of each base station 11 installed in the service area together with the feature information of the service target area in the mobile communication system, Quality measurement information is collected from a user terminal existing in each cell to extract a field quality defective area and the extracted field quality defective area is eliminated based on the position information, beam information, and configuration information of the previously stored base station device 11 And a field quality optimization apparatus and method for controlling each base station apparatus (11).

As shown in FIG. 3, the field quality optimization apparatus 100 according to the present invention is connected to a plurality of access networks 10 constituting a mobile communication system, and is connected to a plurality of access points 10 And controls the antenna of the device 11. [

The field quality optimization apparatus 200 controls the plurality of base station apparatuses 11 distributed and formed on the core network 20 side of the mobile communication system so that the DUs of the plurality of base station apparatuses 11 are concentrated To control a plurality of base station apparatuses 11 connected to the DU center station. At this time, it is preferable that the antenna of the base station apparatus 11 controlled by the field quality optimization apparatus 200 is implemented as an active antenna system (AAS: Active Antenna System) capable of forming a free beam. An active antenna system is an antenna system capable of adjusting amplitude and phase between antenna elements by mounting an active module for each antenna element of the antenna array, and can generate various beam patterns such as Dolph-chebyshev, cosecant squared beam, and null filling In particular, the antenna lobe can be finely controlled to reduce channel interference and power, and the sector can be separated in the vertical direction, thereby contributing to improvement in frequency efficiency.

The operation of the field quality optimization apparatus 200 according to the present invention will be described in more detail with reference to FIG.

FIG. 4 is a flowchart illustrating the operation of the field quality optimization apparatus 100 according to the present invention.

Referring to FIG. 4, in order to optimize field quality, the field quality optimization apparatus 100 collects and stores topographic object information related to a service target area (S105). The feature information refers to information on an object formed on the landform information and the land surface, and in particular, information on the location of the building, the shape of the building, the area, the height, and the like, together with the geographical information. Such feature information can be collected and stored as map data.

In addition, the field quality optimizing apparatus 100 according to the present invention may be configured to optimize the quality of the field by optimizing the information of each base station 11, more specifically, the location information, the beam information, and the configuration information, (S110).

Here, the location information may include at least one of latitude, longitude, and altitude information, for example, as information indicating the location where the antenna is installed in the base station apparatus 11, particularly, the base station apparatus 11.

The beam information is information for defining an antenna beam to be transmitted from the base station apparatus 11 and includes at least one of a directivity angle, a tilting angle, a beam width, a gain, and a beam pattern, . The directional angle represents a direction angle at which the beam is transmitted on a horizontal plane, and the tilting angle represents a direction angle at which the beam is transmitted on the vertical plane. The beam width is a half of the maximum gain of the transmitted beam, The gain represents the maximum gain of the beam and the beam pattern is a curve showing how the electromagnetic waves radiated from the antenna are radiated in each direction and is information defining the shape of the beam, The electric field intensity of the signal received in the direction can be expressed by the angle. The beam pattern becomes thinner with higher directivity.

Next, the configuration information includes at least one of base station configuration information that can be supported by the base station apparatus 11, a maximum output that can be supported by the base station apparatus 11, and EIRP (Effective Isotropic Radiated Power) that can be supported by the base station apparatus 11 . The base station configuration information indicates cell configuration information supported by the base station apparatus 11 and particularly includes the number of cells that can be supported by the base station apparatus 11 and the maximum output is a maximum EIRP is the effective isotropic radiated power representing the radiated power of the antenna and is expressed by the sum of the maximum output and the gain of the antenna.

Among the collected information, the location information of the base station device 11 together with the feature information may be classified into spatial environment information related to the spatial configuration, and the configuration information and the beam information of the base station device 11 may be classified into propagation characteristics It can be classified into radio wave environment information to be related.

When the spatial environment information indicating the spatial characteristics of the service target area and the propagation environment information indicating the propagation characteristics are collected, the field quality optimization apparatus 100 determines the field quality Measurement information is collected (S115). The field quality measurement information is information indicating a propagation characteristic appearing at a location of the terminal, and particularly includes a received electric field intensity of a radio signal transmitted from the base station apparatus 11. [

The field quality measurement information may be collected by receiving a Measurement Report (MR) message periodically or non-periodically from a plurality of terminals existing in each cell of a service area, It is a message that measures and reports related information.

In the collecting of the field quality measurement information, the location information of the corresponding terminal is collected together for the location confirmation corresponding to the field quality measurement information in step S115.

The field quality optimization apparatus 100 generates a field quality map indicating the field quality status of the service target area by mapping the collected field quality measurement information to the feature information on the basis of the collected position information of the terminal S120), the field quality map is analyzed to extract a field quality defective area due to interference, service coverage, or capacity shortage (S125). At this time, it is possible to analyze the field quality measurement information collected in the field quality defective area and to extract the cause of field quality deficiency in the field defective area. For example, when a shadow area appears due to a service coverage or a capacity shortage, since the base station signal is not received at the terminal in the corresponding area, the field quality measurement information is not collected and conversely, , The characteristics of the base station signal received at the terminal may be weakened. Therefore, the cause of the field quality defect can be judged by considering these characteristics.

If at least one field quality defective area is extracted in step S125, the field quality optimization apparatus 100 determines, based on the location information, the configuration information, and the beam information of the previously stored base station apparatus 11, The base station apparatus 11 to be controlled is checked (step S130). More specifically, the field quality optimization apparatus 100 extracts one or more base station apparatuses 11 adjacent to a field quality poor region based on the location information of the base station apparatus 11, Based on the extracted configuration information and beam information of the base station device 11, one or more base station devices 11 capable of antenna control can be extracted again.

The field quality optimization apparatus 100 generates the antenna control information of the extracted base station apparatus 11 by referring to the configuration information and the beam information of the base station apparatus 11 confirmed in step S130 in step S135. The antenna control information controls the antenna state of the base station apparatus 11 to control directional angle control information, tilting angle control information, base station shape change information, base station output change information beam width control information Beam pattern control information, beam gain control information, and the like.

The field quality optimization apparatus 100 transmits the generated antenna control information to the corresponding base station apparatus 11. The base station apparatus 11 controls each antenna element in accordance with the antenna control information, Output, directional angle, and the like are adjusted (S140). This adjustment is possible by individually adjusting the amplitude and phase of each antenna element of the active antenna system.

For example, in the case of the field quality defective area 13 due to the interference shown in FIG. 2 (a), the directional angle of at least one of the base station apparatuses 11a and 11b may be adjusted so that interference is less likely, The antenna can be adjusted to adjust one or more of the beam patterns and / or the beam width of the antenna elements 11a, 11b.

On the other hand, in the case of the field quality defective area 14c due to the lack of service coverage or capacity shown in FIG. 2 (b), if the antenna tilting angle of the base station device 11c is adjusted or two- It is possible to adjust to cover the field quality defective area 14c through sector separation.

In generating the antenna control information in step S135, the field quality optimization apparatus 100 may further consider the traffic information of the area in addition to the above-described configuration information and beam information. For example, if the identified traffic exceeds a preset threshold value, the field quality optimization apparatus 100 checks the traffic in the specific service direction of the corresponding base station apparatus 100, Antenna control information is generated so that the vertical sectorization or the horizontal sectorization of the apparatus 11 is performed. In this case, the service capacity of the corresponding area can be increased by being spatially separated into two cells having the same service band in the corresponding area.

The field quality optimization apparatus 100 generates antenna control information as described above to control the base station apparatus 11 and then collects field quality measurement information from a plurality of terminals existing in a field quality defective area , And confirms the field quality status of the corresponding area (S145).

As a result of checking, if the field quality is not good (S150), the field quality optimization apparatus 100 performs the process again from the step S130 to again perform the antenna adjustment process of the base station apparatus 11 around the field quality defective area.

If the field quality of the corresponding area becomes good (S150) through the repetition of steps S130 to S145, the field quality optimization apparatus 100 determines that the field quality optimization is completed and ends the operation (S155).

The field quality optimization method according to the present invention can be applied to an in-building service of a newly-generated large-scale building through new construction or remodeling, thereby optimizing the field quality of a large-sized building.

5 is a diagram illustrating a beam control state for optimizing field quality according to the present invention.

The field quality optimization method according to the present invention is a method of optimizing a field width or a beam pattern according to feature information (for example, height of a building or width of a building) of a service target area as shown in Figs. 5A and 5B (For example, the height of the building or the width of the building) and / or the traffic information, as shown in Figs. 5 (c) and 5 Field quality can be optimized through horizontal sector separation.

5 (a) and 5 (c) show an antenna beam optimized for a building having a height equal to or higher than a certain height in a vertical direction, and FIGS. 5 (b) and 5 (d) Lt; RTI ID = 0.0 > antenna beam < / RTI >

When the service target building is a high-rise building, the field quality optimization apparatus 100 according to the present invention increases the beam width of the corresponding base station apparatus 11 and increases the output thereof, as shown in FIG. 5 (a) An antenna control is performed so as to cover the entire layer, or two beams separated in the vertical direction are formed through the vertical sector separation of the antenna beam as shown in FIG. 5 (c), thereby serving the lower and upper layers of the target building, respectively. When the traffic of the target building is higher than the reference value, it is preferable to apply the vertical sector separation as shown in FIG. 5 (c) to increase the service capacity.

5 (b), when the service target building is horizontally long and the service can not be performed in a part of the building, the beam pattern is adjusted to be widened in the horizontal direction, or as shown in FIG. 5 (d) Through the horizontal sector separation, the target building can be served through two beams separated horizontally. As described above, when the traffic of the target building is higher than the reference value, it is preferable to apply the horizontal sector separation as shown in (d) of FIG. 5 in order to increase the service capacity.

According to the field quality optimization described above, the base station apparatus 11 in the target area generates a beam according to the shape and characteristics of the building outside the building, without installing the in-building dedicated equipment inside the service target building, Service becomes possible.

The field quality optimization method according to the present invention described with reference to FIG. 4 can be implemented in software form readable by various computer means and recorded in a computer-readable recording medium. Here, the recording medium may include program commands, data files, data structures, and the like, alone or in combination. Program instructions to be recorded on a recording medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. For example, the recording medium may be an optical recording medium such as a magnetic medium such as a hard disk, a floppy disk and a magnetic tape, a compact disk read only memory (CD-ROM), a digital video disk (DVD) Includes a hardware device that is specially configured to store and execute program instructions such as a magneto-optical medium such as a floppy disk and a ROM, a random access memory (RAM), a flash memory, do. Examples of program instructions may include machine language code such as those generated by a compiler, as well as high-level language code that may be executed by a computer using an interpreter or the like.

That is, the field quality optimization apparatus 100 for performing field quality optimization according to the present invention includes a recording medium on which a program module for performing the above-described processing is stored, and a computer including a processor by loading and executing the program module stored in the recording medium, Device. ≪ / RTI > Here, a processor mounted on the field quality optimization apparatus 100 according to the present invention can process program instructions for executing the method according to the present invention. In one implementation, the processor may be a single-threaded processor, and in other embodiments, the processor may be a multithreaded processor. Further, the processor is capable of processing instructions stored on a memory or storage device.

6 is a block diagram showing a configuration of a field quality optimization apparatus 100 according to the present invention for performing the field quality optimization method described above.

Referring to FIG. 6, a field quality optimization apparatus 100 according to the present invention includes an information collection unit 110, a field quality control unit 120, and a storage unit 130. The information collecting unit 110, the field quality control unit 120, and the storage unit 130 may be implemented by hardware such as the above-described processor or recording medium and / or a combination of software executing on such hardware.

The information collection unit 110 is a configuration for collecting spatial environment information, propagation environment information, and field quality measurement information of a service target area in order to optimize the field quality according to the present invention. In particular, the information collecting unit 110 collects field quality measurement information periodically or non-periodically according to a command from a terminal existing in a service target area through the base station device 11. [ In addition, the information collecting unit 110 can periodically or non-periodically collect location information, configuration information, and beam information of each base station 11 from each base station 11. The information collecting unit 110 may collect the geographical information of the service area, for example, map information from an external device (geographical service server).

The field quality control unit 120 controls the information collecting unit 110 to collect information necessary for field quality optimization, that is, feature information, radio wave environment information for each base station device 11, and field quality measurement information And stores it in the storage unit 230. The field quality measurement information is mapped to the feature information to generate a field quality map indicating the spatial field quality state of the service target area, And generates antenna control information based on the propagation environment information of the base station apparatus 11 adjacent to the extracted field quality poor region, more specifically, the configuration information of the base station apparatus 11 and the beam information, And controls the antenna of each base station apparatus 11 to be optimized.

The storage unit 130 stores information necessary for field quality optimization in the field quality optimization apparatus 100 according to the present invention. The storage unit 130 includes a feature database 131 storing feature information of a service target area, Propagation environment information by the base station apparatus in the service target area includes base station DB information 132 in which configuration information, beam information and position information are stored, and base station information 132 that is collected periodically or non-periodically from terminals existing in each cell of the service area And a field quality information DB 133 in which field quality measurement information is stored.

The operation of the field quality optimizing apparatus 100 constructed as described above is performed as shown in FIG. 4, so that redundant description thereof will be omitted.

As shown in FIG. 3, the field quality optimizing apparatus 100 having such a configuration is implemented to be connected to a plurality of base station apparatuses 11 of a mobile communication system, The plurality of base station apparatuses 11 may be formed on the core network 20 connected thereto to perform the operations shown in FIG.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art. It is self-evident to those who have. Furthermore, although specific terms are used in this specification and the drawings, they are used in a generic sense only to facilitate the description of the invention and to facilitate understanding of the invention, and are not intended to limit the scope of the invention.

While the specification contains a number of specific implementation details, it should be understood that they are not to be construed as limitations on the scope of any invention or claim, but rather on the description of features that may be specific to a particular embodiment of a particular invention Should be understood. Certain features described herein in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented in multiple embodiments, either individually or in any suitable subcombination. Further, although the features may operate in a particular combination and may be initially described as so claimed, one or more features from the claimed combination may in some cases be excluded from the combination, Or a variant of a subcombination.

Likewise, although the operations are depicted in the drawings in a particular order, it should be understood that such operations must be performed in that particular order or sequential order shown to achieve the desired result, or that all illustrated operations should be performed. In certain cases, multitasking and parallel processing may be advantageous. Also, the separation of the various system components of the above-described embodiments should not be understood as requiring such separation in all embodiments, and the described program components and systems will generally be integrated together into a single software product or packaged into multiple software products It should be understood.

Certain embodiments of the subject matter described herein have been described. Other embodiments are within the scope of the following claims. For example, the operations recited in the claims may be performed in a different order and still achieve desirable results. By way of example, the process illustrated in the accompanying drawings does not necessarily require that particular illustrated or sequential order to obtain the desired results. In certain implementations, multitasking and parallel processing may be advantageous.

The description sets forth the best mode of the invention, and is provided to illustrate the invention and to enable those skilled in the art to make and use the invention. The written description is not intended to limit the invention to the specific terminology presented. Thus, while the present invention has been described in detail with reference to the above examples, those skilled in the art will be able to make adaptations, modifications, and variations on these examples without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be limited by the described embodiments but should be defined by the claims.

The present invention relates to a field quality optimization technique applied to a mobile communication system so as to divide a coverage area into a plurality of cells and cover the corresponding cell area by providing a base station device for each cell, Field quality measurement information for a service target area is derived by mapping the field quality measurement information measured from the terminal to which the service is to be performed, thereby efficiently extracting the field quality defect area, and further, , The field quality can be improved by referring to the configuration information and the beam information and controlling the antenna beam of the adjacent base station apparatus in the field quality defective area.

Particularly, the present invention automates the field quality optimization process including the field quality measurement, the field quality defective area derivation, and the antenna control, thereby efficiently performing the field quality optimization without wasting excessive resources and time.

In addition, in performing field quality optimization, the present invention performs vertical sector separation or horizontal sector separation according to the topographic information and traffic conditions of a service target area together with position information, configuration information, and beam information of a base station The field quality optimization can be efficiently performed.

10: access network
11: base station device
20: core network
30: external network
100: Field quality optimization device
110: Information collecting unit
120: Field quality wdjqn
130:

Claims (8)

A field quality optimization method for a field quality optimization apparatus for controlling a plurality of base station apparatuses located in a service target area,
Collecting and storing feature information including at least building size information of the service target area;
Collecting and storing location information, configuration information, and beam information of the plurality of base stations;
Collecting field quality measurement information measured from a plurality of terminals existing in the service area and location information of the plurality of terminals;
Mapping field quality measurement information to the feature information on the basis of position information of the plurality of terminals to derive a field quality map indicating a field quality state of each service area;
Extracting at least one field quality defective area in the service target area based on the field quality map; And
Generating antenna control information of a corresponding base station apparatus for field quality optimization based on the configuration information and beam information of the base station apparatus adjacent to the extracted field of poor quality quality and controlling the base station apparatus,
The step of controlling
Checking traffic of the base station device in connection with the building and controlling the building to perform at least one of vertical sector division or horizontal sector division to the building if the traffic exceeds a predetermined threshold. 2. The method of claim 1,
Controlling at least one of a directivity angle, a tilting angle, a beam width, a gain, and a beam pattern with respect to an antenna of the base station apparatus.
delete The method according to claim 1,
Collecting field quality measurement information in the field quality poor region after the controlling step; And
Determining a field quality of the field quality defective area based on the collected field quality measurement information, and performing the control step again if the field quality is not good . A storage unit for storing feature information including at least building size information of a service target area, position information, configuration information, and beam information of a plurality of base station devices located in the service target area;
An information collecting unit for periodically or non-periodically collecting field quality measurement information measured from a terminal located in the service area; And
Mapping the collected field quality measurement information to the feature information, deriving a field quality map indicating a field quality state of the service target area, analyzing the field quality map to extract a field quality defect area, And a field quality control unit for controlling the base station apparatus adjacent to the defective area to optimize the field quality through beam adjustment of the base station apparatus,
The field quality control section
And to control the building to perform at least one of vertical sector division or horizontal sector division with respect to the building when the traffic exceeds a predetermined threshold. 6. The apparatus of claim 5, wherein the field quality control section
And further controls at least one of a directivity angle, a tilting angle, a beam width, a gain, and a beam pattern for the antenna of the base station apparatus.
delete 6. The apparatus of claim 5, wherein the field quality control section
Wherein the control unit checks the field quality measurement information in the field quality defective area through the information collecting unit and repeats the control of the corresponding base station apparatus until the field quality of the field defective area becomes good. Device.

Images