KR102429902B1 - Apparatus for detecting a base station with an outage and method thereof - Google Patents

Abstract

According to the present disclosure, with respect to at least some of the one or more base stations in a server associated with one or more base stations, determining whether at least some of the base stations correspond to outage candidate base stations; acquiring a network scanning result for a first base station from a base station adjacent to the first base station among the one or more base stations when it is determined that a first base station included in at least some base stations is an outage candidate base station; and determining whether the first base station corresponds to a base station in which the outage has occurred based on a network scanning result.

Description

Apparatus and method for detecting a base station in which outage has occurred

The present disclosure relates to an apparatus and method for detecting a base station in which an outage has occurred. More specifically, the present disclosure determines whether at least some of the base stations among one or more base stations in a server associated with one or more base stations correspond to outage candidate base stations, and determines from a base station adjacent to the first base station among one or more base stations to be outage candidate base stations It relates to an apparatus (e.g. server) and method for obtaining a network scanning result for a base station to be used, and determining whether an outage corresponds to a base station generating an outage based on the network scanning result.

Also, the present disclosure relates to a method of compensating for a base station in which an outage has occurred. More specifically, the present disclosure determines whether there is a frequency band usable by the adjacent base station in addition to the frequency band being used by the base station adjacent to the base station where the outage has occurred, and if there is an available frequency band, at least one base station is used It relates to a method of making use of possible frequency bands.

In a mobile communication network, a cell area means an area in which a terminal can access the network through a base station. Mobile communication operators may set a cell area of a mobile communication network based on user distribution using a cell planning tool, and may operate cell coverage to provide the best service to users. In this regard, a range in which the base station can transmit and receive information to and from the user terminal may be referred to as coverage.

However, if the strength of the signal received by the terminal from the base station is weakened due to hardware (HW) error of the base station, software (SW: software) error of the base station, transmission path error, electrical related external error, or excess capacity of the cell, An outage base station may occur in a cell managed by the base station in which the error occurred. When an outage base station occurs, the service provided to the related user terminal may not be smooth.

It may be impossible for most terminals located in the outage base station to access the network. That is, since the signal strength (eg, reference signal received power (RSRP)) received by the terminal located in the area of the outage base station from the base station is weak, an attempt to access the base station (eg, radio resource control (RRC) connection) may fail. In this case, radio link failure (RLF) occurs in a terminal connected to the corresponding base station (eg, a terminal connected to RRC), and the access connection to the network is cut off, so that the terminal may not be able to proceed with the service. When the terminal of is located at the cell boundary, the terminal may continue the service through handover to a neighboring cell.

Key Performance Indicator (hereinafter, KPI) analysis may be performed to detect an outage base station. For example, the KPI analysis corresponds to the process of determining whether the terminal access failure rate of a specific base station becomes greater than the reference value, the service interruption rate becomes greater than the reference value, and the downlink/uplink transmission rate decreases below the reference value. When the terminal access failure rate or service interruption rate of a specific base station increases by more than the reference value, or when the downlink or uplink data rate decreases below the reference value, the corresponding base station may be determined as an outage base station. This process may be referred to as COD (Cell Outage Detection). However, if an outage is determined only by KPI analysis in this way, even if it cannot be called an outage base station in reality, such as an increase in the terminal access failure rate or service interruption rate for other reasons, or a temporary error in the KPI value, etc. There is a possibility of misjudging the base station.

When an outage base station occurs in a mobile communication network, an access service may be provided to a terminal located in the area of the outage base station by expanding the service coverage of the neighboring base station. This process may be referred to as a cell outage recovery (COR), and in this case, the cell of the corresponding neighboring base station may be referred to as a compensation of cell (COC) of the outage base station. The compensation cell may provide a service to terminals located in the area of the outage base station.

When the outage base station is detected, the coverage of the outage base station may be compensated by increasing the transmission power of the neighboring base station (compensation cell). However, when the coverage of the outage base station is compensated for by increasing the transmit power of the neighboring base station in this way, signal quality degradation may occur due to interference between base station signals due to the increase in transmit power, and the neighboring base station is already using the maximum transmit power. When this cannot be increased any longer, it may be difficult to compensate for the coverage of the outage base station.

The terminal service performance connected to the corresponding neighboring cell may be degraded after the corresponding neighboring cell becomes the compensation cell rather than before the corresponding neighboring cell becomes the compensation cell. That is, since the neighboring cell that has become the compensation cell provides a service to the terminals located in the outage base station area, the performance provided to the terminals connected to the neighboring cell before the neighboring cell becomes the compensation cell may be deteriorated. In this regard, reference may be made to prior documents such as KR102012264 case.

Accordingly, there is a need for an improved method for detecting an outage base station and an improved method for compensating for an outage base station.

The problem to be solved by this embodiment is to determine whether the outage candidate base station actually corresponds to the outage candidate base station by acquiring a network scanning result for the outage candidate base station after determining the outage candidate base station in order to solve the above-described problem. An object of the present invention is to provide an apparatus and method for increasing the accuracy of determination by an outage base station by verifying again. In addition, the problem to be solved by this embodiment is a method of compensating for coverage of an outage base station and reducing interference between adjacent base stations by changing a frequency band used by a base station adjacent to the base station in which the outage has occurred, in order to solve the above-mentioned problems. is to provide

The technical problems to be achieved by the present embodiment are not limited to the technical problems described above, and other technical problems may be inferred from the following embodiments.

In the method for detecting a base station having outage in a server associated with one or more base stations according to an embodiment, the at least some base stations correspond to outage candidate base stations with respect to at least some base stations among the one or more base stations. determining whether to do it; When it is determined that the first base station included in the at least some of the base stations is the outage candidate base station, a network scanning result for the first base station is obtained from a base station adjacent to the first base station among the one or more base stations. to do; and determining whether the first base station corresponds to the base station in which the outage occurred based on the network scanning result.

According to an embodiment, the server corresponds to a server constituting a self-organizing network (SON), and the self-organizing network is a network in which a new node accesses and sets up a network by itself, and the surrounding environment It can respond to a network that performs an optimized operation by adapting to it.

According to an embodiment, the determining whether the outage candidate base station is the outage candidate base station may include: receiving a performance parameter related to mobile communication from a second base station included in the at least some base stations; and determining whether the second base station corresponds to the outage candidate base station based on the performance parameter.

According to an embodiment, the performance parameters include a terminal access failure rate of the second base station, a service interruption rate of the second base station, a downlink data rate associated with the second base station, an uplink data rate associated with the second base station, and the second base station. Including at least one of the number of terminals operating within the coverage of the second base station, and determining whether the second base station corresponds to the outage candidate base station, the terminal access failure rate of the second base station is a predetermined first When the first threshold is exceeded, when the service interruption rate of the second base station exceeds a predetermined second threshold, when the downlink transmission rate associated with the second base station is less than the third predetermined threshold, the second In at least one of the case where the uplink rate associated with the base station is less than the fourth threshold value and the number of terminals operating within the coverage of the second base station is less than the fifth threshold value, the second base station performs the It may include determining that it corresponds to the outage candidate base station.

According to an embodiment, obtaining the network scanning result may include: requesting the network scanning from a base station adjacent to the first base station among the one or more base stations; and receiving a response to the request from the adjacent base station.

According to an embodiment, the determining whether the first base station corresponds to the base station in which the outage has occurred may include, when the network scanning result includes the first base station information and a signal corresponding to the first base station, the first base station determining, by the base station, that the outage is not the base station; and when the network scanning result does not include the first base station information and a signal corresponding to the first base station, determining that the first base station is the base station where the outage has occurred.

According to an embodiment, obtaining the network scanning result may include: requesting the network scanning from a base station adjacent to the first base station among the one or more base stations; and generating the network scanning result indicating that the first base station is the base station in which the outage has occurred when a response to the request is not transmitted from the adjacent base station for a predetermined threshold time.

According to an embodiment, in the method of detecting the base station in which the outage has occurred, when it is determined that the first base station is the base station in which the outage has occurred, the adjacent base station in addition to the frequency band used by the base station adjacent to the first base station determining whether there is an usable frequency band; and allowing the at least one base station to use the available frequency band when the available frequency band exists for at least one of the adjacent base stations.

According to an embodiment, it is determined that the first base station is the base station where the outage has occurred, and there is no frequency band usable by the base station adjacent to the first base station other than the frequency band used by the base station adjacent to the first base station. , when there is no transmit power available to the base station adjacent to the first base station in addition to the transmit power being used by the base station adjacent to the first base station, information indicating that the outage has not been resolved may be output.

A server for detecting a base station having an outage in association with one or more base stations according to an embodiment includes a transceiver, a memory for storing instructions, and a processor, wherein the processor is connected to the transceiver and the memory and is connected to the one or more For at least some of the base stations, it is determined whether the at least some of the base stations correspond to outage candidate base stations, and when it is determined that the first base station included in the at least some of the base stations is the outage candidate base station, the one or more A network scanning result for the first base station is obtained from a base station adjacent to the first base station among base stations, and based on the network scanning result, it is determined whether the first base station corresponds to a base station in which the outage has occurred.

In the method for compensating for a base station in which an outage has occurred in a server associated with one or more base stations according to an embodiment, whether there is a frequency band usable by the adjacent base station in addition to the frequency band used by the base station adjacent to the base station where the outage occurs judging; and allowing the at least one base station to use the available frequency band when the available frequency band exists for at least one of the adjacent base stations.

Specific details of other embodiments are included in the detailed description and drawings.

According to the present disclosure, an apparatus and a method for detecting a base station in which an outage has occurred, after determining an outage candidate base station, obtains a network scanning result for the outage candidate base station, so that the outage candidate base station corresponds to the base station where the outage actually occurred It is possible to increase the accuracy of judgment with the outage base station by re-verifying whether the In addition, according to the present disclosure, in the method of compensating for coverage of an outage base station, it is possible to compensate for coverage of an outage base station and reduce interference between adjacent base stations by changing a frequency band used by a base station adjacent to the base station where the outage occurs.

Effects of the invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a schematic configuration diagram illustrating a system for detecting and compensating for a base station having an outage according to an embodiment.
2 is an operation flowchart of a method for detecting a base station in which an outage has occurred in a server according to an exemplary embodiment.
3 is a detailed operation flowchart related to the step of determining an outage candidate base station in a method of detecting a base station in which an outage has occurred in a server according to an embodiment.
4 is a detailed operation flowchart related to the step of acquiring a network scanning result in a method of detecting a base station in which an outage has occurred in a server according to an embodiment.
5 is a flowchart illustrating operations of a server and one or more base stations related to a method of detecting a base station in which an outage has occurred in a system for detecting and compensating for a base station in which an outage has occurred, according to an embodiment.
6 is an operation flowchart of a method for compensating for a base station having an outage in a server according to an embodiment.
7 is a flowchart illustrating an example related to a method for compensating for a base station in which an outage occurs in a server according to an embodiment.
8 is a flowchart illustrating operations of a server and one or more base stations related to a method for compensating for a base station having an outage in a system for detecting and compensating for a base station having an outage according to an embodiment.
9 is a diagram for explaining a case in which a frequency band used by an adjacent base station is changed according to a method of compensating for a base station in which an outage has occurred according to an embodiment.
10 is a diagram for explaining a case in which a frequency band used by an adjacent base station cannot be changed according to a method of compensating for a base station in which an outage has occurred according to an embodiment.
11 is an exemplary diagram of a configuration of a server according to an embodiment.

Terms used in the embodiments are selected as currently widely used general terms as possible while considering functions in the present disclosure, but may vary depending on intentions or precedents of those of ordinary skill in the art, emergence of new technologies, and the like. In addition, in certain cases, there are also terms arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the corresponding description. Therefore, the terms used in the present disclosure should be defined based on the meaning of the term and the contents of the present disclosure, rather than the simple name of the term.

In the entire specification, when a part “includes” a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated. In addition, terms such as “…unit” and “…module” described in the specification mean a unit that processes at least one function or operation, which is implemented as hardware or software, or a combination of hardware and software. can be

The expression “at least one of a, b, and c” described throughout the specification is, 'a alone', 'b alone', 'c alone', 'a and b', 'a and c', 'b and c ', or 'all of a, b, and c'.

The "terminal" referred to below may be implemented as a computer or a portable terminal capable of accessing a server or other terminal through a network. Here, the computer includes, for example, a laptop, a desktop, and a laptop equipped with a web browser (WEB Browser), and the portable terminal is, for example, a wireless communication device that ensures portability and mobility. , IMT (International Mobile Telecommunication), CDMA (Code Division Multiple Access), W-CDMA (W-Code Division Multiple Access), LTE (Long Term Evolution) and other communication-based terminals, smartphones, tablet PCs, etc. It may include a handheld-based wireless communication device.

Hereinafter, with reference to the accompanying drawings, embodiments of the present disclosure will be described in detail so that those of ordinary skill in the art to which the present disclosure pertains can easily implement them. However, the present disclosure may be implemented in several different forms and is not limited to the embodiments described herein.

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

In describing the embodiments, descriptions of technical contents that are well known in the technical field to which the present invention pertains and are not directly related to the present invention will be omitted. This is to more clearly convey the gist of the present invention by omitting unnecessary description.

For the same reason, some components are exaggerated, omitted, or schematically illustrated in the accompanying drawings. In addition, the size of each component does not fully reflect the actual size. In each figure, the same or corresponding elements are assigned the same reference numerals.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains. It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

At this time, it will be understood that each block of the flowchart diagrams and combinations of the flowchart diagrams may be performed by computer program instructions. These computer program instructions may be embodied in a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, such that the instructions performed by the processor of the computer or other programmable data processing equipment are not described in the flowchart block(s). It creates a means to perform functions. These computer program instructions may also be stored in a computer-usable or computer-readable memory that may direct a computer or other programmable data processing equipment to implement a function in a particular manner, and thus the computer-usable or computer-readable memory. It is also possible for the instructions stored in the flowchart block(s) to produce an article of manufacture containing instruction means for performing the function described in the flowchart block(s). The computer program instructions may also be mounted on a computer or other programmable data processing equipment, such that a series of operational steps are performed on the computer or other programmable data processing equipment to create a computer-executed process to create a computer or other programmable data processing equipment. It is also possible that instructions for performing the processing equipment provide steps for performing the functions described in the flowchart block(s).

Additionally, each block may represent a module, segment, or portion of code that includes one or more executable instructions for executing specified logical function(s). It should also be noted that in some alternative implementations it is also possible for the functions recited in the blocks to occur out of order. For example, it is possible that two blocks shown in succession are actually performed substantially simultaneously, or that the blocks are sometimes performed in the reverse order according to the corresponding function.

1 is a schematic configuration diagram illustrating a system for detecting and compensating for a base station having an outage according to an embodiment. Hereinafter, an apparatus for detecting or compensating for a base station having an outage is referred to as a server 110 .

According to various embodiments, a system for detecting and compensating for a base station having an outage may include a server 110 and one or more base stations 120 . According to an embodiment, a system for detecting and compensating for a base station having an outage further includes a network network supporting information transmission/reception between the server 110 and one or more base stations 120 and information transmission/reception within one or more base stations 120 . may be included (not shown).

Server 110 may include a transceiver, memory, and a processor. In addition, the server 110 means a unit for processing at least one function or operation, which may be implemented as hardware or software, or a combination of hardware and software.

More details related to the transceiver, memory, and processor are described later in FIG. 11 .

The server 110 may include a plurality of computer systems or computer software implemented as a network server, and may provide various information by configuring it as a web page. For example, the server 110 is connected to a subordinate device capable of communicating with another network server through a computer network such as an intranet or the Internet to receive a request for performing a task, and a computer providing a result of performing the task. system and computer software. In addition, the server 110 may be understood as a broad concept including a series of application programs that can operate on a network server and various databases built therein. For example, the server 110 is implemented using a network server program that is provided variously according to an operating system such as DOS, Windows, Linux, UNIX, or MacOS. can be

The server 110 operates in association with one or more base stations 120 , detects a base station in which an outage has occurred, and performs a method of compensating for the detected base station. The server 110 is a self-organizing network (SON), which is a network in which a new node accesses and sets up a network by itself, and performs optimized operation by adapting to the surrounding environment (e.g. wireless conditions) and constructing a communication network. Organization Network) may correspond to a server constituting the server.

According to an embodiment, the server 110 centrally controls the SON operation for one or more base stations 120 connected thereto, so it may be referred to as a Centralized Self Organization Network (CSON) server.

The server 110 may perform a function of providing basic parameters or data necessary for one or more base stations 120 .

The server 110 determines whether at least some of the base stations among the one or more base stations 120 correspond to outage candidate base stations, and when it is determined that the first base station included in the at least some base stations is the outage candidate base station, one or more base stations The base station in which the outage has occurred is determined by acquiring a network scanning result for the first base station from a base station adjacent to the first base station, and determining whether the first base station corresponds to the base station in which the outage has occurred based on the network scanning result. detect Network scanning is an operation of detecting a signal of a neighboring base station using the Rx (reception) path of the base station, and decoding at least one of a signal strength, a master information block (MIB), and a system information block (SIB). can be matched.

More details related to a method of detecting a base station having an outage will be described later with reference to FIGS. 2 to 5 .

Furthermore, the server 110 determines whether there is a frequency band usable by the adjacent base station in addition to the frequency band used by the base station adjacent to the base station where the outage has occurred, and determines whether there is a frequency band usable for at least one of the adjacent base stations. In this case, the base station having the outage is compensated by allowing at least one base station to use an available frequency band. According to an embodiment, the adjacent base station may be a base station located within a threshold distance from the base station where the outage occurs. According to an embodiment, the adjacent base station may be a base station whose coverage overlaps at least partially with the coverage of the base station where the outage has occurred. According to an embodiment, the adjacent base station may be a base station in which signal interference may occur with a base station in which an outage has occurred. In addition, the adjacent base station may be defined according to various criteria as a base station associated with the base station where the outage has occurred.

According to an embodiment, when there are a plurality of available frequency bands other than the used frequency band for at least one of the adjacent base stations (that is, when there are a plurality of available center frequencies in addition to the center frequency corresponding to the used frequency band) ), adjacent base stations may use any frequency band among a plurality of available frequency bands. In relation to this, the server 110 may instruct to use an arbitrary frequency band, and an adjacent base station may select and use an arbitrary frequency band by itself. Alternatively, according to an embodiment, which frequency band to use among a plurality of available frequency bands may be selected based on a specific condition. For example, a frequency band to be changed may be selected to minimize interference between a plurality of base stations included in adjacent base stations. For example, if the neighboring base station A included in the adjacent base station can use frequency band X, frequency band Y, and frequency Z in addition to the frequency band being used, if the neighboring base station B changes its use frequency band to frequency band X, the neighbor Base station A may not use the frequency band X overlapping with neighboring base station B. Furthermore, the neighboring base station A may use a frequency band having a lower degree of overlap with the frequency band X among the frequency bands Y and Z.

The base station where the outage has occurred is included in one or more base stations 120 . In addition, a base station adjacent to the base station where the outage has occurred may also be included in the one or more base stations 120 .

More details related to a method of compensating for a base station having an outage will be described later with reference to FIGS. 6 to 10 .

One or more base stations 120 are base stations associated with the server 110, and may transmit/receive information to and from the server 110 and a user terminal (not shown). One or more base stations 120 may correspond to a wireless communication facility that connects the aforementioned network network and the user terminal. For example, the one or more base stations 120 may connect the user terminal with an access network of mobile communication such as CDMA, GSM, WCDMA, and LTE. However, for convenience of description, an embodiment limited to a case in which one or more base stations 120 connect an access network of LTE mobile communication and a user terminal will be described below.

When the user terminal is powered on or newly enters a cell, the user terminal may perform an initial cell search operation such as synchronizing with the base station. The terminal, after initial cell search by receiving a physical broadcast channel from the base station and acquiring intra-cell broadcast information, performs a physical downlink according to a physical downlink control channel (PDCCH) and information carried on the PDCCH. More specific system information may be obtained by receiving a Physical Downlink Control Channel (PDSCH).

The UE may perform PDCCH/PDSCH reception and Physical Uplink Shared Channel (PUSCH)/Physical Uplink Control Channel (PUCCH) transmission as a general uplink/downlink signal transmission procedure. However, the terminal located within the coverage of the base station where the outage has occurred may have difficulty in transmitting and receiving information with the corresponding base station.

In the present specification, a base station (eg, one or more base stations 120 , etc.) may be a term that generically refers to a remote radio head (RRH), an eNB, a transmission point (TP), a reception point (RP), a relay, etc. have. In addition, a specific operation described in this document to be performed by the base station may be performed by an upper node thereof in some cases. That is, it is obvious that various operations performed for communication with the terminal in a network including a plurality of network nodes including the base station may be performed by the base station or other network nodes other than the base station. The base station may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an access point, and the like.

2 is an operation flowchart of a method for detecting a base station in which an outage has occurred in a server according to an exemplary embodiment.

Referring to FIG. 2 , the server 110 according to an embodiment determines whether at least some of the base stations among the one or more base stations 120 correspond to outage candidate base stations ( 210 ). For example, one or more base stations 120 associated with the server 110 correspond to five base stations including a base station A, a base station B, a base station C, a base station D, and a base station E, and a determination of whether or not it corresponds to an outage candidate base station may be performed for base station A, base station B, and base station C.

In order to determine whether it corresponds to an outage candidate base station, a performance parameter related to mobile communication is received from an arbitrary base station (hereinafter, referred to as a second base station for convenience of description) included in at least some of the base stations, and the received performance It may be determined whether the second base station corresponds to an outage candidate base station based on the parameter.

The performance parameter may include at least one of a terminal access failure rate of the second base station and a service interruption rate of the second base station. According to an embodiment, the performance parameter may include an uplink data rate, a downlink data rate of the second base station, and the number of terminals operating within the coverage of the second base station. According to an embodiment, the performance parameter may correspond to a key performance indicator (KPI) of the second base station.

Although the second base station is mainly described for convenience of description, this description does not mean that performance parameters related to mobile communication are transmitted only to one base station among at least some of the base stations. The performance parameters related to mobile communication may be transmitted from a plurality of base stations included in at least some of the base stations, and according to an embodiment, may be transmitted from all base stations included in at least some of the base stations. That is, the description method using the second base station as the main body should be regarded as merely a description method for effectively indicating that the determination is made independently on the performance parameters corresponding to each base station.

Further details related to determining whether the second base station corresponds to an outage candidate base station will be described later with reference to FIG. 3 .

When it is determined that a base station (hereinafter, referred to as a first base station for convenience of description) included in at least some of the base stations is an outage candidate base station, the server 110 determines a network scanning result for the first base station. Acquire (220). Here, the first base station may correspond to at least some of the base stations that transmit performance parameters related to mobile communication to the server 110 .

The server 110 may obtain a network scanning result by requesting the first base station and the adjacent base station for network scanning, and receiving a response to the request from the adjacent base station. In this case, the received response may include a network scanning result.

For convenience of explanation, the first base station has been described as a subject, but this description does not mean that only one base station is determined as an outage candidate base station. A plurality of base stations may be determined as outage candidate base stations, and according to an embodiment, all base stations included in at least some base stations may be determined as outage candidate base stations. That is, the description method using the first base station as the main body should be regarded as merely a description method for effectively indicating that the network scanning result corresponding to each base station is independently obtained.

Also, the first base station and the second base station do not mean different base stations. Rather, considering that the first base station is a base station determined to be an outage candidate base station and the second base station is a base station transmitting performance parameters, the set of base stations that can be the second base station may include the first base station.

Based on the network scanning result, the server 110 determines whether the first base station corresponds to the base station where the outage has occurred ( 230 ).

Further details related to obtaining the network scanning result and determining whether the outage corresponds to the base station where the outage has occurred based on the network scanning result will be described later with reference to FIGS. 4 and 5 .

3 is a detailed operation flowchart related to the step of determining an outage candidate base station in a method of detecting a base station in which an outage has occurred in a server according to an embodiment.

Referring to FIG. 3 , the server 110 according to an embodiment may receive a performance parameter related to mobile communication from a second base station included in at least some of the base stations ( 310 ).

The server 110 may determine whether the second base station corresponds to an outage candidate base station based on the received performance parameter. Specifically, the server 110 determines whether the number of received performance parameter data exceeds a preset K ( 320 ), and if it exceeds the preset K ( 320 , Yes), the performance corresponding to the received performance parameter data It may be determined whether the parameter satisfies condition A ( 330 ).

The performance parameter data may be data including one or more performance parameters. Specifically, information corresponding to the performance parameters in each base station included in one or more base stations 120 (eg, terminal access failure rate, service interruption rate, uplink data rate, downlink data rate, and the number of terminals operating within the coverage, etc.) may be collected, processed into one file, performance parameter data, and transmitted to the server 110 at regular intervals. Since the reliability of the performance parameter data transmitted during the initial operation of the base station may be unstable, the server 110 determines whether the number of received performance parameter data exceeds a preset K in order to secure reliability of the received performance parameter data. can judge In this case, whether the number of received performance parameter data exceeds a preset K may be determined for each transmission base station. For example, when K is 3, when receiving two performance parameter data from base station A and receiving 12 performance parameter data from base station B, the number of performance parameter data received from base station A does not exceed the preset K On the other hand, it may be determined that the number of performance parameter data received from the base station B exceeds a preset K.

Condition A may be related to the terminal access failure rate, service interruption rate, downlink/uplink transmission rate, the number of terminals operating within the coverage of the base station, and the like of the base station corresponding to the received performance parameter. For example, the terminal access failure rate of the base station corresponding to the received performance parameter is greater than the reference value (ex. the first threshold value), or the service interruption rate of the specific base station corresponding to the received performance parameter is the reference value (ex. the second Threshold) or a downlink rate associated with a specific base station corresponding to the received performance parameter is smaller than a reference value (eg, a third threshold), or an uplink rate associated with a specific base station corresponding to the received performance parameter If the link rate is less than the reference value (ex. the fourth threshold value) or the number of terminals operating within the coverage of the second base station is less than the reference value (ex. the fifth threshold value), condition A may be satisfied can In addition, condition A may correspond to various situations in which it may be determined that an outage has occurred.

When the received performance parameter satisfies condition A (330, Yes), the server 110 may determine a base station corresponding to the received performance parameter as an outage candidate base station (340). For example, the server 110 that has received the performance parameter including at least one of the terminal access failure rate and the service interruption rate from the second base station, and when the terminal access failure rate of the second base station exceeds a predetermined first threshold and the second The second base station may be determined to correspond to the outage candidate base station in at least one of the cases in which the service interruption rate of the base station exceeds a predetermined second threshold.

Meanwhile, when the number of received performance parameter data does not exceed the preset K ( 320 , No), the server 110 may continue to attempt reception of another performance parameter ( 310 ). In addition, if the received performance parameter does not satisfy condition A (330, No), the server 110 determines that the base station corresponding to the received performance parameter is not an outage candidate base station, and continues to receive other performance parameters. to try (310).

Steps 310 to 340 may be steps included in step 210 of FIG. 2 .

4 is a detailed operation flowchart related to the step of obtaining a network scanning result in a method of detecting a base station in which an outage has occurred in a server according to an embodiment.

Referring to FIG. 4 , the server 110 may request a network scanning from an adjacent base station to obtain a network scanning result for a first base station determined as an outage candidate base station ( 410 ). The server 110 may check whether a response to the network scanning request is received within a threshold time, and if the response is received within the threshold time, determine whether the first base station is an outage base station according to the response.

Specifically, when the server 110 does not receive a response to the network scanning request (420, No), the server 110 determines how much time has elapsed since transmitting the network scanning request, and the elapsed time after transmitting the network scanning request. If the time period does not exceed the preset threshold time (430, No), it may continue to wait for a response to the request.

On the other hand, when the server 110 does not receive a response to the request from the adjacent base station while exceeding a preset threshold time after transmitting the network scanning request (430, Yes), the server 110 separates the response Without determination, it may be determined that the first base station is an outage base station ( 450 ). That is, since the first base station is already determined to be an outage candidate base station, if an additional response is not received from an adjacent base station, the first base station may be determined as an outage base station. In this case, the server 110 may generate a network scanning result indicating that the first base station is a base station where the outage has occurred.

However, depending on the embodiment, when the elapsed time after transmitting the network scanning request exceeds a preset threshold time (430, Yes), the server 110 may determine that the first base station is not an outage base station. have.

When the server 110 receives a response to the network scanning request ( 420 , Yes), the server may determine whether the received response includes content related to communication of the first base station ( 440 ). The communication related content may include first base station information and a signal corresponding to the first base station. If it is determined that the received response includes content related to communication of the first base station (440, Yes), it may be determined that the first base station is not a base station in which an outage has occurred. On the other hand, when it is determined that the received response does not include the communication-related content of the first base station (440, No), that is, when it does not include the first base station information and the signal corresponding to the first base station, the first base station It may be determined that the outage is a base station ( 450 ).

Steps 410, 420 and 430 may be steps included in step 220 of FIG. 2 . Step 440 may be a step included in step 230 of FIG. 2 .

The server 110 may compensate the outage of the first base station when it is determined that the first base station is an outage base station (not shown). A method of compensating for an outage base station will be described later with reference to FIGS. 6 to 10 .

5 is an operation flowchart illustrating operations of a server and one or more base stations related to a method of detecting a base station in which an outage has occurred in a system for detecting and compensating for a base station in which an outage has occurred, according to an embodiment.

Referring to FIG. 5 , one or more base stations 120 according to an embodiment may include a target base station 501 , a neighbor base station A 502 , and a neighbor base station B 503 . The target base station 501 is a base station that transmits performance parameters to the server 110 , and may correspond to a base station for which it is determined whether the target base station is an outage base station. The neighboring base station A 502 and the neighboring base station B 503 may be base stations adjacent to the target base station 501 . Neighbor base station A 502 and neighboring base station B 503 are merely examples for convenience of description of the adjacent base station, and do not mean that the adjacent base station is limited to two specific base stations, and the number of adjacent base stations may vary. can be set.

The server 110 may receive a performance parameter from the target base station 501 ( 510 ), and determine whether the target base station 501 corresponds to an outage candidate base station ( 520 ). When it is determined that the target base station 501 is an outage candidate base station, the server 110 may request network scanning from the neighbor base station A 502 and the neighbor base station B 503, which are adjacent base stations, respectively (530 and 540). The neighboring base station A 502 and the neighboring base station B 503 may perform network scanning in response to the request of the server 110 (550, 560), and may transmit the network scanning result to the server 110 (570, 580). ).

Based on the received network scanning result, the server 110 may determine whether the target base station 501 corresponds to the base station where the outage has occurred ( 590 ).

6 is an operation flowchart of a method of compensating a base station in which an outage occurs in a server according to an embodiment.

Referring to FIG. 6 , in order to compensate for the base station in which the outage has occurred, the server 110 determines whether there is a frequency band usable by the adjacent base station in addition to the frequency band being used by the base station adjacent to the base station where the outage has occurred ( 610). If there is an usable frequency band for at least one of the adjacent base stations (610, Yes), the server 110 at least one base station to use an available frequency band other than the frequency band being used by at least one of the adjacent base stations. change the frequency band used ( 620 ). By changing the frequency band used by at least one base station, the coverage of the base station where the outage has occurred can be compensated, and interference between adjacent base stations can be reduced.

When there is no usable frequency band for at least one of the adjacent base stations (610, No), the server 110 may output information indicating that the outage has not been resolved (630).

At least some of steps 610 , 620 , and 630 may be steps performed after step 230 of FIG. 2 . In this case, the base station in which the outage has occurred may correspond to the first base station.

7 is a flowchart illustrating an example related to a method for compensating for a base station in which an outage occurs in a server according to an embodiment.

Referring to FIG. 7 , the server 110 determines whether there is a frequency band usable by the adjacent base station in addition to the frequency band being used by the base station adjacent to the base station where the outage has occurred in order to compensate for the base station in which the outage has occurred ( In 710 ), it may be determined whether there is transmit power further usable by the adjacent base station in addition to the transmit power being used by the first base station and the adjacent base station ( 720 , 750 ). Determination of whether there is a frequency band usable by the adjacent base station and the determination of whether there is transmit power available to the adjacent base station in addition to the transmit power being used by the adjacent base station may be made simultaneously or sequentially, In the case of being performed sequentially, the order may be freely determined. However, for convenience of explanation, hereinafter, it is determined whether there is a frequency band usable by the adjacent base station, and then, in addition to the transmission power being used by the adjacent base station, it is determined whether there is more available transmission power. The description is limited to an embodiment in which further judgment is made.

The server 110 may determine whether there is a frequency band usable by the adjacent base station in addition to the frequency band used by the base station adjacent to the base station where the outage has occurred ( 710 ). When there is a usable frequency band for at least one of the adjacent base stations (710, Yes), the server 110 may determine whether there is a transmit power further usable by the adjacent base station in addition to the transmission power being used (720). ). When there is more available transmission power (720, Yes), the server 110 changes the frequency band used by at least one base station to use a frequency band available in addition to the frequency band being used by at least one base station among the adjacent base stations. and, by allowing at least one of the adjacent base stations to further use at least a portion of the more available transmit power, the transmit power may be increased by at least a portion ( 730 ). On the other hand, when there is no more usable transmission power (720, No), the server 110 uses the frequency band of at least one base station to use an available frequency band in addition to the frequency band being used by at least one of the adjacent base stations. The band may be changed ( 740 ), but the transmit power may not be increased.

When there is no usable frequency band with respect to at least one of the adjacent base stations (710, No), the server 110 may determine whether there is transmit power available to the adjacent base station in addition to the transmission power being used ( 720). If there is more available transmit power (720, Yes), the server 110 may increase the transmit power by at least a portion by allowing at least one of the adjacent base stations to further use at least a portion of the more available transmit power. There is (760). On the other hand, when there is no more usable transmit power (750, No), the server 110 may not be able to change the frequency band used by the adjacent base station and may not be able to increase the transmit power. In this case, the server 110 may output information indicating that the outage has not been resolved ( 770 ).

8 is a flowchart illustrating operations of a server and one or more base stations related to a method of compensating for a base station having an outage in a system for detecting and compensating for a base station having an outage according to an embodiment.

Referring to FIG. 8 , one or more base stations 120 according to an embodiment may include a target base station 501 , a neighbor base station A 502 , and a neighbor base station B 503 (corresponding to FIG. 5 ). The target base station 501 is a base station that transmits performance parameters to the server 110 , and may correspond to a base station in which an outage occurs. The neighboring base station A 502 and the neighboring base station B 503 may be base stations adjacent to the target base station 501 . The neighboring base station A 502 and the neighboring base station B 503 may correspond to a base station capable of at least one of a change in a frequency band used and an increase in transmission power.

The server 110 may request a parameter change from the neighboring base station A 502 and the neighboring base station B 503 (810, 820). The parameter that is the target of the change request may be a parameter different from the aforementioned performance parameter.

The neighboring base station A 502 and the neighboring base station B 503 may change parameters based on the parameter change request transmitted from the server 110 ( 830 and 840 ). In this case, the parameter to be changed may include at least one of a frequency band used and transmission power.

The neighboring base station A 502 and the neighboring base station B 503 may transmit a response indicating that the parameter has been changed to the server 110 (850 and 860).

9 is a diagram for explaining a case in which a frequency band used by an adjacent base station is changed according to a method of compensating for a base station in which an outage has occurred according to an embodiment.

Referring to FIG. 9 , the center frequency and transmission power of a target base station and a base station adjacent to the target base station before generation of an outage may be the same ( 910 ). In this regard, the target base station may correspond to the target base station 501 of FIGS. 5 and 8 . For example, the center frequency of the target base station before the outage is generated may be 1849.90 MHz, and the center frequencies of the neighboring base station A, the neighboring base station B, and the neighboring base station C may also be 1849.90 MHz. In addition, the output of the transmission power of the target base station before the outage is generated may be 1W, and the output of the transmission power of the neighbor base station A, the neighbor base station B, and the neighbor base station C, which are adjacent base stations, may also be 1W.

However, this is only an example to emphasize that the center frequency or transmission power of adjacent base stations may vary when an outage occurs, and even when the outage of the target base station does not occur, an outage occurs in one of the adjacent base stations or other communication The center frequency or transmission power of the base station adjacent to the target base station may be different, or may already be different, for reasons of other reasons.

After the outage is generated according to an embodiment, at least one of a center frequency and a transmit power of an adjacent base station may be changed ( 920 ). For example, when an outage occurs in the target base station, the center frequency of the neighboring base station A, which is an adjacent base station, may be changed from 1849.90 MHz to 1840.00 MHz, and the center frequency of the neighboring base station B may be changed from 1849.90 MHz to 1860.00 MHz. In addition, the output of the transmit power of the neighboring base station A, the neighboring base station B, and the neighboring base station C may increase from 1W to 10W.

When the transmission power of the adjacent base station is increased to compensate the coverage of the base station in which the outage has occurred, excessive signal interference may occur due to the increased transmission power if the same frequency band is used between the adjacent base stations. On the other hand, when adjacent base stations use different frequency bands (here, different frequency bands do not mean frequency bands that do not overlap each other at all, but frequency bands in which at least some non-overlapping sections exist) , even if the transmit power of the adjacent base station is increased, the degree of signal interference due to the relatively increased transmit power may be reduced.

Furthermore, even when it is impossible to increase the transmit power of the adjacent base stations, signal interference between adjacent base stations can be reduced by making the center frequencies between adjacent base stations different, so that at least a part of the coverage of the base station where the outage occurs can be compensated as a result. have.

10 is a diagram for explaining a case in which a frequency band used by an adjacent base station cannot be changed according to a method of compensating for a base station in which an outage has occurred according to an embodiment.

Referring to FIG. 10 , when it is not possible to change the center frequency or increase the transmit power for any adjacent base stations after the outage is generated according to an embodiment, the server 110 transmits information indicating that the outage has not been resolved. It can be output (1020). The information indicating that the outage has not been resolved may include a screen indicating that the outage has not been resolved, an alarm sound, a vibration, or the like, and may be information composed of a combination of at least some of them.

11 is an exemplary diagram of a configuration of a server according to an embodiment.

Referring to FIG. 11 , the server 110 includes a transceiver 1110 , a processor 1120 , and a memory 1130 . The server 110 may be connected to one or more base stations 120 and an external device (eg, a user terminal) through the transceiver 1110 and exchange data.

The processor 1120 may include at least one of the devices described above with reference to FIGS. 1 to 10 , or perform at least one method described above with reference to FIGS. 1 to 10 . The memory 1130 stores information for performing at least one method described above with reference to FIGS. 1 to 10 (including at least one of preset K, preset threshold time, performance parameter, available frequency band, and available transmission power) can be saved The memory 1130 may be a volatile memory or a non-volatile memory.

The processor 1120 may control the server 110 for executing a program and providing information. The code of the program executed by the processor 1120 may be stored in the memory 1130 .

In addition, the server 110 of the embodiment may further include an interface that can provide information to the user.

On the other hand, in the present specification and drawings, preferred embodiments of the present invention have been disclosed, and although specific terms are used, these are only used in a general sense to easily explain the technical content of the present invention and help the understanding of the present invention, It is not intended to limit the scope of the invention. It will be apparent to those of ordinary skill in the art to which the present invention pertains that other modifications based on the technical spirit of the present invention can be implemented in addition to the embodiments disclosed herein.

The electronic device or terminal according to the above-described embodiments includes a processor, a memory for storing and executing program data, a permanent storage such as a disk drive, a communication port for communicating with an external device, a touch panel, and a key (key). ), user interface devices such as buttons, and the like. Methods implemented as software modules or algorithms may be stored on a computer-readable recording medium as computer-readable codes or program instructions executable on the processor. Here, the computer-readable recording medium includes a magnetic storage medium (eg, read-only memory (ROM), random-access memory (RAM), floppy disk, hard disk, etc.) and an optically readable medium (eg, CD-ROM). ), DVD (Digital Versatile Disc), and the like. The computer-readable recording medium is distributed among network-connected computer systems, so that the computer-readable code can be stored and executed in a distributed manner. The medium may be readable by a computer, stored in a memory, and executed on a processor.

This embodiment may be represented by functional block configurations and various processing steps. These functional blocks may be implemented in any number of hardware and/or software configurations that perform specific functions. For example, an embodiment may be an integrated circuit configuration, such as memory, processing, logic, look-up table, etc., capable of executing various functions by the control of one or more microprocessors or other control devices. can be hired Similar to how components may be implemented as software programming or software components, this embodiment includes various algorithms implemented in a combination of data structures, processes, routines or other programming constructs, including C, C++, Java ( Java), assembler, Python, etc. may be implemented in a programming or scripting language. Functional aspects may be implemented in an algorithm running on one or more processors. In addition, the present embodiment may employ the prior art for electronic environment setting, signal processing, and/or data processing. Terms such as “mechanism”, “element”, “means” and “configuration” may be used broadly and are not limited to mechanical and physical configurations. The term may include the meaning of a series of routines of software in connection with a processor or the like.

The above-described embodiments are merely examples, and other embodiments may be implemented within the scope of the claims to be described later.

Claims (12)

A method for detecting a base station in which an outage occurs in a server associated with one or more base stations, the method comprising:
determining, with respect to at least some of the one or more base stations, whether the at least some of the base stations correspond to outage candidate base stations;
When it is determined that the first base station included in the at least some base stations is the outage candidate base station, a network scanning result for the first base station is obtained from a base station adjacent to the first base station among the one or more base stations. to do; and
determining whether the first base station corresponds to the base station in which the outage occurred based on the network scanning result;
The step of obtaining the network scanning result is
requesting the network scanning from a base station adjacent to the first base station among the one or more base stations; and
Receiving a response to the request from the adjacent base station,
A method for detecting a base station where an outage has occurred.
According to claim 1,
The server corresponds to a server constituting a self-organizing network (SON),
A method for detecting a base station where an outage has occurred.
According to claim 1,
The step of determining whether the outage candidate base station corresponds to the
receiving a performance parameter related to mobile communication from a second base station included in the at least some of the base stations; and
Comprising the step of determining whether the second base station corresponds to the outage candidate base station based on the performance parameter,
A method for detecting a base station where an outage has occurred.
4. The method of claim 3,
The performance parameters include a terminal access failure rate of the second base station, a service interruption rate of the second base station, a downlink data rate associated with the second base station, an uplink data rate associated with the second base station, and coverage of the second base station. ) including at least one of the number of terminals operating within,
In the step of determining whether the second base station corresponds to the outage candidate base station, when the terminal access failure rate of the second base station exceeds a first predetermined threshold value, the service interruption rate of the second base station is a predetermined second When the threshold value is exceeded, when the downlink data rate associated with the second base station is less than a third predetermined threshold value, when the uplink data rate associated with the second base station is less than a fourth predetermined threshold value, and when the second base station Comprising the step of determining that the second base station corresponds to the outage candidate base station in at least one of the cases where the number of terminals operating within the coverage is less than a predetermined fifth threshold,
A method for detecting a base station where an outage has occurred.
delete According to claim 1,
The step of determining whether the first base station corresponds to the base station where the outage occurred is
determining that the first base station is not the base station where the outage has occurred when the network scanning result includes the first base station information and a signal corresponding to the first base station; and
When the network scanning result does not include the first base station information and a signal corresponding to the first base station, determining, by the first base station, that the outage is a base station,
A method for detecting a base station where an outage has occurred.
According to claim 1,
The step of obtaining the network scanning result is
When a response to the request is not transmitted from the adjacent base station for a predetermined threshold time, the method comprising: generating, by the first base station, a network scanning result indicating that the outage is a base station;
A method for detecting a base station where an outage has occurred.
According to claim 1,
when it is determined that the first base station is the base station where the outage has occurred, determining whether a frequency band usable by the adjacent base station exists in addition to the frequency band used by the base station adjacent to the first base station; and
If the available frequency band exists for at least one of the adjacent base stations, further comprising the step of allowing the at least one base station to use the available frequency band,
A method for detecting a base station where an outage has occurred.
According to claim 1,
when it is determined that the first base station is the base station in which the outage has occurred, determining whether there is transmit power further usable by the adjacent base station in addition to the transmit power used by the base station adjacent to the first base station; and
If there is the more usable transmit power for at least one of the adjacent base stations, increasing the transmit power of the at least one base station by at least a portion of the more usable transmit power,
A method for detecting a base station where an outage has occurred.
According to claim 1,
It is determined that the first base station is the base station where the outage has occurred, and there is no frequency band usable by the base station adjacent to the first base station other than the frequency band used by the base station adjacent to the first base station, and the first base station and the first base station Outputting information indicating that the outage has not been resolved when there is no transmit power further usable by the base station adjacent to the first base station in addition to the transmit power being used by the adjacent base station,
A method for detecting a base station where an outage has occurred.
In a server for detecting a base station in which an outage has occurred in association with one or more base stations,
a transceiver, memory for storing instructions, and a processor;
The processor is connected to the transceiver and the memory,
For at least some of the one or more base stations, it is determined whether the at least some of the base stations correspond to outage candidate base stations, and when it is determined that the first base station included in the at least some of the base stations is the outage candidate base station, A network scanning result for the first base station is obtained from a base station adjacent to the first base station among the one or more base stations, and the first base station corresponds to the base station in which the outage has occurred based on the network scanning result. to decide what to do,
In order to obtain the network scanning result, the processor is configured to request the network scanning from a base station adjacent to the first base station among the one or more base stations, and to receive a response to the request from the adjacent base station,
server.
A method of compensating for a base station in which an outage occurs in a server associated with one or more base stations,
determining whether a frequency band usable by the adjacent base station exists in addition to the frequency band being used by the base station adjacent to the base station where the outage has occurred; and
If the available frequency band exists for at least one of the adjacent base stations, allowing the at least one base station to use the available frequency band;
The step of using the available frequency band is
When a plurality of usable frequency bands exist for a specific base station included in the adjacent base station, selecting a frequency band to be used by the specific base station from among the plurality of available frequency bands based on a set condition;
When the adjacent base station includes a plurality of base stations, the set condition includes a condition for selecting a frequency band to be used in a direction in which interference between the plurality of base stations is reduced,
A method of compensating for outage base stations.

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