KR20180092005A - Method and apparatus for compensating outage cell in small cell network - Google Patents

Abstract

The present invention relates to a method and an apparatus for compensating an outage cell in a small cell network. According to the present invention, a network management apparatus determines whether a state of a first cell is an outage state that a terminal belonging to a first cell cannot access the first cell. The network management apparatus excludes a cell which is in a state of saving energy or compensates a cell different from the first cell among a plurality of neighboring cells existing around the first cell when the state of the first cell is the outage state. The network management apparatus requests performance information of the plurality of base stations to a plurality of base stations serving other cells other than the excluded cells among the plurality of neighboring cells. The network management apparatus selects at least one compensation cell to participate in compensation of the first cell among the remaining cells based on the performance information of the plurality of base stations.

Description

Field of the Invention [0001] The present invention relates to a method and apparatus for compensating an outage cell in a small-

The present invention relates to a method and apparatus for autonomously compensating (or servicing) an area of an outgoing cell through cooperation of neighboring cells when an outage cell is recognized in a dense small cell network, and a control method And apparatus.

In a mobile communication network, a cell region refers to an area where a terminal can access a network through a base station. Mobile service providers use cell planning tools to configure cell areas of the mobile communication network based on user distribution and to operate cell coverage to provide the best service to the users. However, if the strength of the signal received from the base station by the terminal becomes weak due to hardware (HW) error of the base station, software (SW) error of the base station, transmission path error, external error related to electricity, An outage cell is generated in the cell managed by the base station. It is impossible for most terminals located in an outgoing cell to access the network. That is, the terminal located in the area of the outgoing cell fails to make a connection (for example, a radio resource control (RRC) connection) attempt to the base station due to a weak signal strength (for example, RSRP) . In this case, a radio link failure (RLF) occurs to a terminal connected to the base station (e.g., a terminal connected to the RRC), the connection to the network is disconnected and the terminal can not proceed with the service. Lt; / RTI > continues service through handover to neighboring cells.

When an outage cell occurs in a mobile communication network, a neighboring cell expands its service coverage to provide an access service to a terminal located in an area of an outgoing cell. In this case, the surrounding cell becomes the compensation cell (COC) of the outer cell. The compensation cell provides services to the terminals located in the area of the outer cell. The terminal service performance connected to the neighboring cell may be degraded after the neighboring cell becomes the compensation cell before the neighboring cell becomes the compensation cell. That is, the performance of providing the coverage cell to the UEs connected to the neighboring cell before the neighboring cell becomes the compensation cell may be degraded by providing the coverage cell to the UEs located in the coverage area.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and apparatus for minimizing performance degradation of UEs connected to a compensating cell that compensates for an area of an outgoing cell when an occurrence of an outgoing cell is recognized in a dense small cell network will be.

According to an embodiment of the present invention, a method is provided in which a network management apparatus compensates a cell in an outage state. The method for compensating an outage cell of the network management apparatus comprises the steps of: determining whether a state of the first cell is a state of the out of service state in which the terminal belonging to the first cell can not access the first cell; Excluding a cell that is in an energy saving state or that is compensating for a cell different from the first cell among a plurality of neighboring cells existing in the vicinity of the first cell when the state of the first cell is an outgoing state; Requesting performance information of the plurality of base stations to a plurality of base stations serving remaining cells other than the excluded cells among the plurality of neighboring cells; And selecting at least one compensation cell to participate in compensation of the first one of the remaining cells based on performance information of the plurality of base stations.

The performance information of the plurality of base stations may include a central processing unit (CPU) occupancy rate of the plurality of base stations.

Wherein the selecting comprises: determining at least one first base station having a CPU occupancy rate lower than a first reference value among the plurality of base stations; And comparing the performance information with performance information of the at least one first base station.

The comparing step may include determining whether the at least one first base station satisfies a condition defined by (performance information of the at least one first base station / performance reference information) < second reference value have.

Wherein the performance information of the at least one first base station comprises at least one of a traffic load of the first base station, a number of connected terminals of the at least one first base station, and a radio frequency (RF) transmission of the at least one first base station Output.

The performance criteria information may include a maximum traffic load, a maximum number of connected terminals, and a maximum RF transmission output.

The condition is defined as a first condition defined by (a traffic load / a maximum traffic load) < a second condition defined by a second criterion, a number of connected terminals / RF transmission output) < second reference value.

Wherein the selecting includes selecting four cells served by the four or more first base stations as compensation cells when the number of base stations satisfying the condition among the at least one first base station is four or more .

Two of the four compensation cells may be symmetrically positioned with respect to the first cell and the remaining two compensation cells may be symmetrical with respect to the first cell.

Selecting three cells served by the three first base stations as compensation cells when the number of base stations satisfying the condition among the at least one first base station is three; And selecting two cells served by the two first base stations as compensation cells when the number of base stations satisfying the condition among the at least one first base station is two.

Wherein the selecting comprises: activating a second cell in an energy saving state among the plurality of neighboring cells when the number of base stations satisfying the condition among the at least one first base station is one or less; Requesting a base station serving the second cell for performance information of a base station serving the second cell; And determining whether the base station serving the second cell has a CPU occupation rate lower than the first reference value.

Wherein the step of selecting comprises: when the number of base stations satisfying the condition among the at least one first base station is one, the one first base station transmits the performance information of the one first base station / ) &Lt; a third criterion; And selecting one cell served by the one first base station as a compensation cell when the one first base station satisfies the additional condition.

The third reference value may be smaller than the second reference value.

According to another embodiment of the present invention, there is provided a method for a network management apparatus to compensate for a cell in an outage state. The method of claim 1, wherein, when the state of the first cell is a state in which the terminal belonging to the first cell can not access the first cell, Selecting at least one compensation cell to compensate for the first cell among a plurality of neighboring cells; And wherein, when the number of the at least one compensation cells is four, two of the four compensation cells serve a part of the area of the first cell, and the remaining two compensation cells of the four compensation cells And requesting the first base stations providing the four compensation cells to base station reconstruction so as to service the remainder of the area of the first cell.

Two of the four compensation cells are symmetrically positioned with respect to the first cell and the remaining two compensation cells are symmetrically positioned with respect to the first cell.

The step of requesting the first base stations for base station reconfiguration comprises: modifying the antenna configuration information of the first base stations for area expansion of the four compensation cells; And requesting the first base stations for antenna reconfiguration based on the changed antenna configuration information.

The modified antenna configuration information includes an altered antenna RF transmission output value of the first base stations, a modified antenna tilt value of the first base stations, and a modified antenna gain value of the first base stations. can do.

The step of requesting the first base stations for the base station reconfiguration may further comprise storing antenna configuration information set for the first base stations before the antenna reconfiguration for the first base stations.

The step of requesting the first base stations for the base station reconfiguration may include the steps of compensating the first cell for the four compensation cells when the base station connection success rate of the terminals in the first cell region is equal to or greater than a first reference value And storing antenna configuration information set for the first base stations for compensation of the first cell.

Wherein the step of requesting the first base stations to reconfigure the base station includes re-modifying the antenna configuration information of the first base stations when the base station connection success rate of the terminals existing in the first cell region is smaller than a first reference value, And re-requesting the first base stations for antenna reconfiguration based on the re-modified antenna configuration information.

The outage cell compensation method of the network management apparatus is characterized in that when the number of the at least one compensation cell is three, the three compensation cells serve a part or all of the area of the first cell, And requesting the second base stations controlling the compensation cell to perform base station reconfiguration.

The step of requesting the second base stations for base station reconfiguration may further include, for the region expansion of the three compensation cells, determining, based on the relative positions of the three compensation cells on the basis of the first cell, Changing configuration information; And requesting the second base stations for antenna reconfiguration based on the changed antenna configuration information.

The method of claim 1, wherein, if the number of the at least one compensation cells is two, the method of compensating an outage cell of the network management apparatus comprises: And requesting the second base stations to reconfigure the antenna based on the changed antenna configuration information.

The method of claim 1, wherein, if the number of the at least one compensation cell is one, the second base station controlling the one compensation cell performs the performance information / performance criterion of the second base station Information) < a criterion is satisfied; And, if the second base station satisfies the condition, changing the antenna configuration information of the second base station to expand the area of the one compensation cell and transmitting the antenna reconfiguration based on the changed antenna configuration information to the second base station And may further include a requesting step.

According to another embodiment of the present invention, there is also provided a method for a network management apparatus to compensate for a cell in an outage state. The method of claim 1, wherein, when the state of the first cell is a state in which the terminal belonging to the first cell can not access the first cell, Selecting at least one compensation cell to compensate for the first cell among a plurality of neighboring cells; Storing antenna configuration information of at least one base station providing the at least one compensation cell as first antenna configuration information; Modifying antenna configuration information of the at least one base station for expansion of the at least one compensation cell; And requesting, by the at least one base station, an antenna reconfiguration based on the first antenna configuration information when the first cell is recovered from an outage state to a steady state.

The modifying may include storing the modified antenna configuration information as second antenna configuration information.

Wherein the second antenna configuration information includes at least one of a changed antenna RF transmission output value of the at least one base station, a modified antenna tilt value of the at least one base station, and a modified antenna gain of the at least one base station gain value.

According to an embodiment of the present invention, when an occurrence of an outage cell is recognized in a dense small cell network, the network management apparatus can select a compensating cell among neighbor cells of the outage cell.

Also, according to the embodiment of the present invention, a plurality of compensation cells (or a plurality of base stations providing the same) divides and compensates the area of the outer cell, so that the terminal located in the area of the outer cell provides service Can receive.

Also, according to the embodiment of the present invention, it is possible to improve the quality of mobile communication service by providing a seamless service even if a base station that services a specific cell region in a dense small cell network fails.

1 is a diagram illustrating a method of compensating an outlier cell according to an embodiment of the present invention.
2 is a diagram illustrating a mobile communication network structure according to an embodiment of the present invention.
3 is a diagram illustrating a cell configuration according to an embodiment of the present invention.
FIGS. 4A, 4B, and 4C are diagrams illustrating a method of selecting a compensation cell among peripheral cells according to an exemplary embodiment of the present invention. Referring to FIG.
FIGS. 5A, 5B, and 5C are diagrams illustrating a method for compensating for a region of an outermost cell according to an embodiment of the present invention.
6 is a diagram illustrating a case where four neighboring cells compensate for an outage cell according to an embodiment of the present invention.
FIG. 7 is a diagram illustrating a method of compensating for an outage cell by one neighboring cell according to an embodiment of the present invention. Referring to FIG.
8 is a diagram of a computing device, in accordance with an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

In the present specification, duplicate descriptions are omitted for the same constituent elements.

Also, in this specification, when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, May be present. On the other hand, in the present specification, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that no other element exists in between.

Furthermore, terms used herein are used only to describe specific embodiments and are not intended to be limiting of the present invention.

Also, in this specification, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise.

Also, in this specification, the terms &quot; comprise &quot;, or &quot; have &quot;, and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

Also, in this specification, the term 'and / or' includes any combination of the listed items or any of the plurality of listed items. In this specification, 'A or B' may include 'A', 'B', or 'both A and B'.

Also, in this specification, a terminal is referred to as a mobile terminal, a mobile station, an advanced mobile station, a high reliability mobile station, a subscriber station, May refer to a mobile subscriber station, an access terminal, a user equipment (UE), or the like, and may refer to a terminal, a mobile terminal, a mobile station, an advanced mobile station, a high- A subscriber station, an access terminal, a user equipment, and the like.

Also, in this specification, a base station (BS) includes an advanced base station, a high reliability base station, a node B, an evolved node B, eNodeB, eNB), an access point, a radio access station, a base transceiver station, a mobile multihop relay (MMR) -BS, a relay station serving as a base station, BSs, Node Bs, eNodeBs, access points, wireless access stations, etc., may be referred to as high reliability relay stations, repeaters, macro base stations, A repeater, a high-reliability repeater, a repeater, a macro base station, a small base station, and the like.

1 is a diagram illustrating a method of compensating an outlier cell according to an embodiment of the present invention. Specifically, FIG. 1 illustrates a process of compensating for an outage cell through a base station antenna reconfiguration.

The terminal connects to the external Internet through cell access in the cell coverage, and proceeds with the service. The mobile communication network operator decides the mobile communication network service coverage through careful cell planning in order to continuously provide a certain level of service to the users. However, due to a sudden physical failure (e.g., base station hardware error, base station software error, transmission error, external electrical errors, switch-off for energy savings, etc.) An outlier cell which can not be generated occurs.

When the network management apparatus NM10 recognizes the occurrence of an outgoing cell in a dense small cell network, the network management apparatus NM10 transmits the current performance information (e.g., traffic) of neighboring cells located in the vicinity of the outgoing cell Load information, number of connected users, antenna transmission output, CPU (central processing unit) occupancy). ENB-C, eNB-D, and eNB-B) located in the vicinity of the outgoing cell (or the base station (eNB-A) eNB-E, eNB-F, eNB-G) to report the current performance status of each base station (eNB-B to eNB-G, for example). The network management apparatus NM10 receives performance status information from peripheral base stations (eNB-B to eNB-G, for example).

The network management apparatus NM10 selects a compensation cell (or a base station providing the compensation cell) suitable for compensation of the outage cell based on the performance state information of each reported neighboring cell (or the base station providing the same). 1 shows an example in which four base stations (eNB-C, eNB-D, eNB-F, eNB-G) among peripheral base stations (eNB-B to eNB- .

The network management apparatus NM10 may further include a compensation cell base station (for example, a base station, a base station, and the like), taking into consideration the area of the outage cell and the location of the selected compensation cell an antenna tilt value, and an antenna gain value of the eNB-C, the eNB-C, the eNB-D, the eNB-F, and the eNB- The network management apparatus NM10 transmits the compensated cell (or the compensated base station (eNB-C, eNB-D, eNB-F, C, eNB-D, eNB-F, and eNB-G to reconfigure the eNB-G, eNB-G, The network management apparatus NM10 is informed of the reconstruction result from the compensated cell base station (eNB-C, eNB-D, eNB-F, eNB-G, for example).

The network management apparatus NM10 and the compensating base stations (eNB-C, eNB-D, eNB-F, and eNB-G, for example), after completing the reconfiguration of the relevant compensating cell base stations, It is confirmed whether or not this is the reference value. After the base station reconfiguration, if the terminal connection success rate in the area of the outgoing cell is higher than the reference value, the network management apparatus NM10 completes the compensation process for the outgoing cell. Each base station (eNB-C, eNB-D, eNB-F, and eNB-G) is composed of a process of completing the out cell compensation.

When the network management apparatus NM10 recognizes that the base station controlling the outgoing cell has been normally recovered, the network management apparatus NM10 transmits the compensated cell (or the compensating base station (eNB-C, eNB-D, eNB- , eNB-G)) to reconfigure (e.g., reconfigure the antenna) to the state prior to compensation.

In a dense compact cell network, neighboring cells can be composed of many cells, and it is important to select cells suitable for compensation among many cells.

Hereinafter, a method and apparatus for controlling an outgoing cell will be described. Specifically, when the occurrence of an outage cell is recognized in a dense small cell network, a method of selecting at least one suitable compensation cell (or at least one base station that provides it) capable of participating in compensating an area of an outgoing cell among neighboring cells Will be described. Here, the compensation cell may be a cell rich in spare resources. Also, a method of compensating (or providing) service by dividing a region of an outer cell by at least one selected compensation cell will be described. Also, a method of minimizing the degradation of performance provided to a UE connected to an area of a serving cell after the cell is changed to a compensating cell will be described. Also, a method of quickly recovering the compensation cell to the previous cell state when the outage cell is normally restored will be described.

1. Mobile communication network management structure

2 is a diagram illustrating a mobile communication network structure according to an embodiment of the present invention.

As illustrated in FIG. 2, the network management apparatus NM10 collects in real time the information transmitted by the terminal UE and the base station (eNodeB), and always monitors the network status. When an error occurs in the base station, the network management apparatus NM10 maintains the network performance in an optimized state through a related information analysis and a network reconfiguration process. The network management apparatus NM10 includes an integration reference point (IRP) manager function and the base station eNodeB includes an IRP agent function. The network management apparatus NM10 and the base station eNodeB exchange information through an Itf-N interface (e.g., RPC (remote procedure call) method).

As illustrated in FIG. 2, the UE may transmit a reference signal received quality (RSRP / RSRQ), an RLF report, a location information, and the like, which are measured by the UE in a connected state (e. And transmits CQI (channel quality indication) information to the base station. The UE transmits the serving cell information and neighbor cell information measured by the idle-state UE to the BS. The base station stores and manages the measurement information transmitted by the terminal. This information is utilized as basic information for the network management apparatus NM10 to determine the outgoing cell.

As illustrated in FIG. 2, the base station (eNodeB) stores and manages the current performance state information of the base station (for example, the traffic load state, the number of connected users, the antenna transmission output, and the CPU occupancy rate) in real time. When the IRP manager of the network management device NM10 requests the base station to use related information using the RPC method (e.g., GetParameterValues Request), the base station's IRP agent transmits the information to the network management device (NM10).

The base station (eNodeB) communicates with an evolver packet core (EPC) connected to the Internet via the S1 interface. The base station (eNodeB) communicates with the other base station (eNodeB) via the X2 interface.

3 is a diagram illustrating a cell configuration according to an embodiment of the present invention.

Specifically, in the cell construction environment illustrated in FIG. 3, the network operator constructs 14 cells (e.g., Cell-A, Cell-B, Cell-C, ..., Cell- (E. G., ENB-A, eNB-B, ..., eNB-N) receive service from one base station (e.g., Cell-A to Cell-N).

The base station eNB-A serving a cell (Cell-A) provides an Internet service through wireless connection with terminals located in a cell (Cell-A).

As illustrated in FIG. 3, six neighboring cells (for example, Cell-B, Cell-C, Cell-D, Cell-E, Cell-F, and Cell-G) exist around the cell do. At a position where a cell (Cell-A) and neighboring cells (e.g., Cell-B to Cell-G) overlap, the terminal can access a base station (eNodeB) that provides better signal quality and proceed with mobile communication services.

Hereinafter, an embodiment of the present invention will be described by taking the cell construction environment exemplified in Fig. 3 as an example.

As illustrated in Table 1 below (cell-base station performance reference value), the network management apparatus NM10 manages the performance reference value (or performance threshold) of all base stations and the antenna configuration information of all base stations. As illustrated in Table 2 below (neighboring cell information), the network management apparatus NM10 manages information on neighboring cells.

About Cell Cell-A Cell-B Cell-C Cell-D Cell-E Cell-F Base station ID eNB-A eNB-B eNB-C eNB-D eNB-E eNB-F Maximum traffic performance (or maximum traffic load) A1 B1 C1 D1 E1 F1 Concurrent maximum user (or terminal) number of connections A2 B2 C2 D2 E2 F2 Antenna Max RF Transmit Output Value A3 B3 C3 D3 E3 F3 RF transmission output value before compensation A3-1 B3-1 C3-1 D3-1 E3-1 F3-1 RF transmission output during compensation A3-2 B3-2 C3-2 D3-2 E3-2 F3-2 Antenna Tilt value before compensation A4 B4 C4 D4 E4 F4 Antenna Tilt value during compensation A4-2 B4-2 C4-2 D4-2 E4-2 F4-2 The antenna gain before compensation A5 B5 C5 D5 E5 F5 Antenna gain value during compensation A5-2 B5-2 C5-2 D5-2 E5-2 F5-2

For example, in Table 1, the maximum traffic load provided by the base station (eNB-A) serving the cell (Cell-A) is A1, the maximum number of users (Max User) is A2 , The maximum RF transmission power value is A3, the RF transmission output value before compensation is A3-1, and the changed RF transmission output value (RF transmission output value during compensation) for compensation of the outgoing cell is A3-2, the antenna tilt value before compensation is A4, the antenna tilt value (the antenna tilt value during compensation) changed to compensate for the outgoing cell is A4-2, the antenna gain value before compensation is A5, The modified antenna gain value (antenna gain value during compensation) for compensation of the T cell is A5-2.

Cell ID Nearby cells and location information Cell-A Cell name Cell-B Cell-C Cell-D Cell-E Cell-F Cell-G location
(Based on Cell-A) N EN ES S WS WN Cell-B Cell name Cell-A Cell-G Cell-H Cell-I Cell-J Cell-C location
(Based on Cell-B) S E EN N WN WS Cell-C Cell name Cell-D Cell-A Cell-B Cell-J Cell-K Cell-L location
(Cell-C standard) S E EN N W WS

In Table 2, information (e.g., cell name, cell position) about the cell and neighboring cells established through the cell plan of the network operator is illustrated.

For example, in the periphery of a cell (Cell-A), a cell (Cell-A) is referred to in the north direction (N) (Cell-D) in the direction ES, a cell Cell-E in the south direction S, a cell Cell-F in the south-west direction WS, ) Is constructed. The cell (Cell-B) and the cell (Cell-E) are positioned symmetrically with respect to the cell (Cell-A).

(For example, the positions of neighboring cells (e.g., Cell-B to Cell-G) shown in Table 2) are set such that when the cell (Cell-A) And it is important data for selection of compensation cell to serve.

In the following Table 3 (cell-base station compensation state and energy saving state), it is determined whether or not the network management apparatus NM10 is in the state of compensation service for all current cells (e.g., Cell-A to Cell-N) Management is exemplified.

About Cell Cell-B Cell-C Cell-D Cell-E Cell-F Cell-G Base station ID eNB-B eNB-C eNB-D eNB-E eNB-F eNB-G The compensation cell no-exist Cell-A Cell-A no-exist Cell-A Cell-A Energy saving state
(Energy Saving State) yes no no no no no

In the initial state in which the network is installed, not all surrounding cells of the base station participate in compensation services and energy savings. In the case where a compensation cell for compensating (or servicing) an outage cell occurs or an energy saving cell is generated in accordance with an environment change, as illustrated in Table 3, the network management apparatus NM10 is connected to the compensation cell or the energy saving cell Change the state of the corresponding base station (eg, eNB-C: 'no-exist' -> 'Cell-A', eNB-B: 'no' -> 'yes').

For example, in Table 3, cells (Cell-C), Cell-D, Cell-F, and Cell- And the cell (Cell-B) is in the process of energy saving. The information illustrated in Table 3 is used to select a compensation cell to compensate for the area of the outer cell.

2. Outside  Compensating Cells ( compensate ) &Lt; / RTI &gt;

If the probability of the UE connection probability suddenly drops below the reference value and the rate of stopping the ongoing service becomes higher than the reference value, the network management apparatus NM10 notifies the base station servicing the area of the specific cell that the outage cell has occurred I know.

When a specific cell is outgoing, all attempts by the terminal to connect (e.g., RRC connection) to the cell (or the base station servicing the cell) fail. Then, the RLF is generated in the terminal connected to the corresponding base station, and the network connection is released or a small number of terminals located in the boundary area access the neighboring cell through the handover process.

FIGS. 4A, 4B, and 4C are diagrams illustrating a method of selecting a compensation cell among peripheral cells of an outer cell according to an exemplary embodiment of the present invention. Referring to FIG.

When the network management apparatus NM10 detects an outage cell, it examines the neighboring cells of the outgoing cell and the neighboring cells serving the neighboring cells through the information in Table 1 and Table 2 (S11).

The network management apparatus NM10 notifies the neighboring cells of the outgoing cell that the current cell is not an energy saving state (ES) and at the same time does not compensate other cells (I.e., the providing base station) (S12). That is, the network management apparatus NM10 excludes the cells that are in the energy saving state among the neighboring cells of the outgoing cell, or that compensate for the cells other than the outgoing cell. If there is no cell satisfying the condition of step S12, the network management apparatus NM10 performs the following S20 process.

The network management apparatus NM10 notifies all the base stations (hereinafter referred to as 'peripheral cell base stations') that the neighboring cells examined through the process of step S12 of the current performance state information (e.g., traffic load, RF transmission output, CPU occupancy, etc.) (S13).

The network management apparatus NM10 confirms the performance status information reported from the neighboring cell BSs and determines the BSs having a CPU occupancy rate of less than or equal to a reference value (e.g., 85%) of neighboring cell BSs. The network management apparatus NM10 continues the compensation cell selection method for the base stations having the CPU occupancy rate of the neighboring cell base stations (for example, 85%) or less (S14). If there is no base station having a CPU occupation rate lower than a reference value (for example, 85%) among neighboring cell base stations, the network management apparatus NM10 performs the following S20 process.

The network management apparatus NM10 transmits performance state information (e.g., traffic load information, connected user number information, and antenna transmission output (e.g., traffic information) collected from peripheral cell base stations of the outgoing cell (Eg, maximum traffic performance, maximum concurrent user connections, maximum RF transmission power, etc.) stored in Table 1 (S15). Then, based on the comparison result, the network management apparatus NM10 selects one of the following three conditions (i.e., the performance status information of the neighboring cell BS / the base station BS10 of the neighboring cell BS) Performance criterion value) < threshold value) (S15). The network management apparatus NM10 can set a threshold value for the following conditions. Under the following conditions, the threshold can initially be set to 0.6 and can be changed according to the network operator policy.

- Condition 1: (traffic load / maximum traffic load reference value) <threshold (e.g., 0.6)

- Condition 2: (number of connected users / number of maximum connected users) <threshold (eg 0.6)

- Condition 3: (antenna transmission output / antenna maximum RF transmission output) <threshold (eg 0.6)

If there are neighboring cell base stations satisfying all three conditions of step S15, the network management apparatus NM10 performs step S17 and step S18 according to the number of selected neighboring cell base stations (e.g., peripheral cell base stations satisfying step S15) , And S19 (S16). More specifically, if the number of neighboring cell BSs satisfying the process of S15 is four or more, the network management apparatus NM10 performs step S17. The network management apparatus NM10 performs step S18 when the number of neighboring cell base stations satisfying the step S15 is three. The network management apparatus NM10 performs step S19 when the number of neighboring cell base stations satisfying the step S15 is two. The network management apparatus NM10 performs step S21 when the number of neighboring cell base stations satisfying the step S15 is one. If the number of neighboring cell base stations satisfying the step S15 is one or less, the network management apparatus NM10 performs step S20.

In a case where the number of neighboring cell base stations satisfying the three conditions of step S15 (e.g., peripheral cell base stations satisfying the step S15) is four or more, the network management apparatus NM10 transmits service (E.g., {Cell-D and Cell-G}, {Cell-C and Cell-F}) which are symmetrically positioned with respect to each other around an outgoing cell (e.g., Cell- , Or four neighboring cell base stations) is selected as a compensation cell (or a compensating base station) that compensates for the outage cell (S17). The network management apparatus NM10 starts a procedure for compensating the outgoing cell through processes starting with 'four peripheral compensation cells' (S40) illustrated in FIG. 5A (S17). In a compact cell environment, more than 10 peripheral cells may exist in a specific cell. In the method according to an embodiment of the present invention, four suitable cells among peripheral cells are selected.

When the number of peripheral cell base stations satisfying the three conditions of step S15 (e.g., peripheral cell base stations satisfying the step S15) is three, the network management apparatus NM10 transmits the three neighboring cell base stations (I.e., three neighboring cells served by neighboring cell base stations) as a compensating base station (or compensation cell) compensating for the outgoing cell (S18). The network management apparatus NM10 starts a procedure for compensating the outgoing cell through the processes starting with the 'three surrounding cells' (S50) illustrated in FIG. 5B (S18).

The network management apparatus NM10 transmits to the two neighboring cell BSs (or the corresponding two neighboring cell BSs) the number of neighboring cell BSs that satisfy the three conditions of step S15 (I.e., two neighboring cells served by neighboring cell base stations) as a compensating base station (or compensation cell) compensating the outgoing cell (S19). The network management apparatus NM10 starts a procedure for compensating the outgoing cell through the processes starting with the 'two surrounding cells' (S60) illustrated in FIG. 5C (S19).

If there is no suitable neighboring cell in step S12, step S14, or step S16, the network management apparatus (for example, step S12, step S14, or step S16) NM10) activates (or switches-off) the neighboring cells (or neighboring cell base stations serving the energy saving service) among neighboring cells (or neighboring cell base stations serving the neighboring cells) in Table 3, (E.g., traffic load, number of connected users, RF transmission output, CPU occupancy, etc.) to the activated peripheral cell base stations after a predetermined time (e.g., about 15 minutes) . Thereafter, the network management apparatus NM10 performs steps S14, S15, and S16 to select an appropriate compensation cell (S20). If one compensation base station (or compensation cell) is selected through this process, the network management apparatus NM10 performs the method illustrated in FIG. 7 (i.e., a method in which one neighboring cell compensates for the outgoing cell) (S21). If at least one compensating base station (or compensating cell) is not selected through this process, the network management apparatus NM10 notifies the network operator of 'compensation cell selection failed'.

3. Outside  How to compensate for cell area

The network management apparatus NM10 is configured to perform a compensation service for the area of the outgoing cell by the selected neighboring cell base stations to increase the RF transmission power and adjust the antenna tilt information and the antenna gain information to service the area of the outgoing cell, And requests a cell reconfiguration to the selected neighboring cell base stations.

Hereinafter, a method for the network management apparatus NM10 to service an area of an outgoing cell will be described.

FIGS. 5A, 5B, and 5C are diagrams illustrating a method for compensating for a region of an outermost cell according to an embodiment of the present invention. 6 is a diagram illustrating a case where four neighboring cells compensate for an outage cell according to an embodiment of the present invention.

5A, when four neighboring cell base stations (or four neighboring cells) are selected to compensate for the outage cell, the network management apparatus NM10 is configured to select one of the four neighboring cell base stations (Two base stations located symmetrically with each other) serve 80% of the area of the outgoing cell and the remaining one of the four surrounding cell base stations serves the remaining 20% of the area of the outgoing cell. And requests four neighboring cell base stations (S41, S42, and S43). That is, a pair of neighboring cells (located at symmetrical positions with respect to the outermost cell) provided by (or controlled by) a pair of neighboring cell base stations serve 80% of the area of the outgoing cell, The network management apparatus NM10 is configured so that a pair of neighboring cells (located at symmetrical positions with respect to the outlier cell) provided by the peripheral cell base station serves 20% of the area of the outgoing cell, The base station can request the base station reconfiguration. Specifically, the network management apparatus NM10 determines (or changes) the antenna configuration information (e.g., the antenna RF transmission output value, the antenna tilt value, and the antenna gain value) of each of the four peripheral cell base stations, (E.g., antenna reconstruction based on the modified antenna configuration information) for each of the four neighboring cell base stations (S42, S43, S44).

Table 1 shows the antenna configuration information (for example, the antenna RF transmission output value before the compensation, the antenna tilt value before the compensation, and the antenna tilt value before the compensation) set for the four neighboring cell base stations before the compensation (or before the antenna reconstruction) Lt; / RTI &gt; antenna gain before compensation).

After a predetermined time has elapsed, the network management apparatus NM10 calculates a base station connection success probability (hereinafter, referred to as 'terminal connection success rate') of the terminals located in the area of the outgoing cell (S45).

If the terminal access success rate is equal to or greater than a reference value (e.g., 95%), the network management apparatus NM10 confirms that the cell compensation process is completed and terminates the base station reconfiguration process (S46).

If the terminal connection success rate is smaller than the reference value (e.g., 95%), the network management apparatus NM10 transmits the antenna configuration information of the selected four neighboring cell base stations (e.g., antenna RF transmission output value, antenna tilt value, (E.g., antenna reconstruction based on the reconfigured antenna configuration information) to each of the four neighbor cell base stations after re-establishing or re-modifying (e.g., increasing or decreasing) After completion of the reset procedure, the network management apparatus NM10 transmits the antenna configuration information (e.g., the antenna RF transmission output value, the antenna tilt value, and the antenna gain value) of the base station if the terminal access success rate is less than a reference value The process of resetting is performed up to a maximum of two times. In a case where the network management apparatus NM10 performs the reset procedure up to four times, if the terminal connection success rates by the four reset procedures are all less than the reference value (e.g., 95%), (E.g., an antenna RF transmission output value, an antenna tilt value, and an antenna gain value) supporting the highest terminal access success rate among the neighboring cell base stations. At this time, the network management apparatus NM10 notifies the network operator of the terminal connection success rate. For this method, all of the antenna configuration information (e.g., antenna RF transmission output value, antenna tilt value, and antenna gain value) determined in the four reset procedures are temporarily stored.

When the reconfiguration process for the compensation of the outgoing cell (e.g., Cell-A) is completed, the network management apparatus NM10 stores in Table 3 that neighbor cells of the outage cell compensate for the outage cell. Then, the network management apparatus NM10 transmits the antenna configuration information of the neighboring cell BSs that compensates for the outgoing cell (e.g., the antenna RF transmission output value changed for the compensation of the outgoing cell, Tilt value, and antenna gain value changed for compensation of the outer cell) are stored in Table 1.

For example, as illustrated in FIG. 6, when the network management apparatus NM10 recognizes that the cell (Cell-A) is in the outgoing state, it allocates four compensation base stations (or compensation cells) (E.g., an antenna RF transmission output value, an antenna tilt value, and an antenna gain value) of the four compensating base stations and determines the antenna configuration information Compensated base stations. In this way, the four compensating base stations (or the compensating cells) can expand the service area of the four compensating base stations (or the compensation cells) to service the divided areas of the area served by the outer cell (Cell-A). 6, the extended cells (Cell-C, Cell-D, Cell-F, and Cell-G) of the cell (Cell-A) (Cell-A) is compensated and the neighboring cell (Cell-B) is in an energy saving state.

On the other hand, as illustrated in FIG. 5B, when the network management apparatus NM10 selects three neighboring cell base stations to compensate for the outage cells, it is assumed that at least three neighboring cell base stations have more than 95% (S51, S52). That is, the network management apparatus NM10 can request the three neighboring cell base stations to reconfigure the base station so that the three neighboring cells provided by the three surrounding cell base stations serve more than 95% of the area of the outgoing cell. Specifically, the network management apparatus NM10 is configured to transmit, based on relative position information of three neighboring cell base stations (e.g., relative positions of three neighboring cells around the outgoing cell), antenna configuration information (Or changes) an antenna RF transmission output value, an antenna tilt value, and an antenna gain value (S51) based on the set antenna configuration information (e.g., Antenna reconfiguration) to the neighboring cell base stations (S52).

Table 1 shows the antenna configuration information (for example, the antenna RF transmission output value before compensation, the antenna tilt value before compensation, and the antenna gain value before compensation) for the selected three neighboring cell base stations in Table 1 Register (or save).

After a predetermined time elapses, the network management apparatus NM10 calculates a base station connection success probability (terminal connection success rate) of the terminals located in the area of the outgoing cell (S53). At this time, if the terminal access success rate is equal to or higher than a reference value (e.g., 95%), the network management apparatus NM10 confirms that the cell compensation function is completed and terminates the base station reconfiguration (S54).

If the terminal connection success rate is smaller than the reference value (e.g., 95%), the network management apparatus NM10 transmits the antenna configuration information of the selected three neighboring cell base stations (e.g., antenna RF transmission output value, antenna tilt value, ) (E.g., increase or decrease), and then requests the base station reconfiguration for each of the three neighbor cell base stations. The network management apparatus NM10 transmits the antenna configuration information (e.g., the antenna RF transmission output value, the antenna tilt value, and the antenna gain value) of the base station to the base station if the terminal connection success rate is smaller than a reference value (e.g., 95% The process of resetting is performed up to a maximum of two times. In a case where the network management apparatus NM10 performs the reset procedure up to four times, if the terminal connection success rates by the four reset procedures are all less than the reference value (e.g., 95%), (E.g., an antenna RF transmission output value, an antenna tilt value, and an antenna gain value) supporting the highest terminal access success rate among the neighboring cell base stations. At this time, the network management apparatus NM10 notifies the network operator of the terminal connection success rate. For this method, all of the antenna configuration information (e.g., antenna RF transmission output value, antenna tilt value, and antenna gain value) determined in the four reset procedures are temporarily stored.

When the reconfiguration process for compensating the outgoing cell (e.g., Cell-A) is completed, the network management apparatus NM10 determines that neighboring cells (e.g., three neighboring cells) of the outgoing cell compensate for the outgoing cell And stored in Table 3. Then, the network management apparatus NM10 transmits the antenna configuration information (e.g., the changed antenna RF transmission output value for the compensation of the outgoing cell, out The antenna tilt value changed for the compensation of the T cell, and the antenna gain value changed for compensation of the outer cell) are stored in Table 1.

Meanwhile, as illustrated in FIG. 5C, when two neighboring cell base stations are selected to compensate for the outage cell, the network management apparatus NM10 transmits 90% or more of the areas of the outage cells And requests the two neighboring cell base stations to perform service (S61, S62). That is, the network management apparatus NM10 can request the two neighboring cell base stations to reconfigure the base station so that two adjacent cells provided by the two neighboring cell base stations serve more than 90% of the area of the outgoing cell. Specifically, the network management apparatus NM10 sets (or changes) the antenna configuration information (e.g., antenna RF transmission output value, antenna tilt value, antenna gain value) of each of the two neighboring cell base stations (S61) (E.g., antenna reconstruction based on the set antenna configuration information) for extension of a region (or coverage) to two neighboring cell base stations (S62).

Table 1 shows the antenna configuration information (for example, the antenna RF transmission output value before compensation, the antenna tilt value before compensation, and the antenna gain value before compensation) for the selected two neighboring cell base stations in Table 1 Register (or save).

After a predetermined time elapses, the network management apparatus NM10 calculates a base station connection success probability (terminal connection success rate) of the terminals located in the area of the outgoing cell (S63). At this time, if the terminal access success rate is equal to or greater than a reference value (e.g., 90%), the network management apparatus NM10 confirms that the cell compensation function is completed and terminates the base station reconfiguration (S64).

If the terminal connection success rate is smaller than the reference value (e.g., 90%), the network management apparatus NM10 transmits the antenna configuration information of the selected two neighboring cell base stations (e.g., antenna RF transmission output value, antenna tilt value, ) (E.g., increase or decrease), and then requests the base station reconfiguration to each of the two neighboring cell base stations. The network management apparatus NM10 transmits the antenna configuration information (e.g., the antenna RF transmission output value, the antenna tilt value, and the antenna gain value) of the base station to the base station if the terminal connection success rate is smaller than a reference value (e.g., 90% The process of resetting is performed up to a maximum of two times. In a case where the network management apparatus NM10 performs the reset procedure up to four times, if the terminal connection success rates by the four reset procedures are all less than the reference value (e.g., 95%), (E.g., an antenna RF transmission output value, an antenna tilt value, and an antenna gain value) supporting the highest terminal access success rate among the neighboring cell base stations. At this time, the network management apparatus NM10 notifies the network operator of the terminal connection success rate. For this method, all of the antenna configuration information (e.g., antenna RF transmission output value, antenna tilt value, and antenna gain value) determined in the four reset procedures are temporarily stored.

When the reconfiguration process for compensating the outgoing cell (e.g., Cell-A) is completed, the network management apparatus NM10 determines that the neighboring cells (e.g., two neighboring cells) of the outgoing cell compensate for the outgoing cell And stored in Table 3. Then, the network management apparatus NM10 transmits the antenna configuration information (e.g., the changed antenna RF transmission output value for the compensation of the outgoing cell, The antenna tilt value changed for the compensation of the cell, and the antenna gain value changed for compensation of the outer cell) are stored in Table 1.

FIG. 7 is a diagram illustrating a method of compensating for an outage cell by one neighboring cell according to an embodiment of the present invention. Referring to FIG.

As illustrated in FIG. 7, when one neighboring cell BS is selected to compensate for the outage cell, the network management apparatus NM10 compares the performance information reported from the selected BS and the BS performance reference value stored in Table 1 (S71). Then, based on the comparison result, the network management apparatus NM10 determines whether the selected one neighboring cell BS has the following three conditions (i.e., (performance state information of one neighboring cell BS / base station performance reference value) < threshold x Is satisfied (step S71). The network management apparatus NM10 can set the threshold value x for the following conditions. The threshold value x may be smaller than the threshold value for the condition of the S15 process. Under the following conditions, the threshold x may initially be set to 0.5 and may be changed according to the network operator policy.

- Condition 1: (traffic load / maximum traffic load reference value) <threshold x

- Condition 2: (number of connected users / number of maximum connected users) <threshold x

- Condition 3: (antenna transmission output / maximum RF transmission output) <threshold x

The network management apparatus NM10 stops the selection of the compensation cell for the outage cell when one selected peripheral cell base station does not satisfy the above three conditions (S75).

When one selected peripheral cell base station satisfies all the above three conditions, the network management apparatus NM10 transmits a signal to one peripheral cell base station so that one peripheral cell base station compensates (or services) more than 80% And requests the cell base station (S72). That is, the network management apparatus (NM10) can request the neighboring cell base station to reconfigure the base station so that one neighboring cell provided by one neighboring cell base station serves more than 80% of the area of the outgoing cell. Specifically, the network management apparatus NM10 sets (or changes) the antenna configuration information (e.g., the antenna RF transmission output value, the antenna tilt value, and the antenna gain value) of one peripheral cell base station, (E.g., reconfiguration of the antenna based on the set antenna configuration information) for the expansion of the neighboring cell base station (S72).

Table 1 shows the antenna configuration information (for example, the antenna RF transmission output value before compensation, the antenna tilt value before compensation, and the antenna gain value before compensation) for one selected peripheral cell base station in Table 1 Register (or save).

After a predetermined time elapses, the network management apparatus NM10 calculates a BS connection success probability (terminal connection success rate) of the MSs located in the area of the outgoing cell (S73). At this time, if the terminal access success rate is equal to or greater than a reference value (e.g., 80%), the network management apparatus NM10 confirms that the cell compensation function is completed and terminates the base station reconfiguration (S74).

If the terminal connection success rate is smaller than the reference value (e.g., 80%), the network management apparatus NM10 transmits the antenna configuration information (e.g., the antenna RF transmission output value, the antenna tilt value, ) (E.g., increase or decrease), and then requests a neighboring cell base station to reconfigure the base station. The network management apparatus NM10 transmits the antenna configuration information (e.g., the antenna RF transmission output value, the antenna tilt value, and the antenna gain value) of the base station to the base station if the terminal connection success rate is smaller than a reference value (e.g., 80% The process of resetting is performed up to a maximum of two times. In a case where the network management apparatus NM10 performs the reset procedure up to four times, if the terminal connection success rates by the four reset procedures are all less than the reference value (e.g., 95%), (E.g., an antenna RF transmission output value, an antenna tilt value, and an antenna gain value) supporting the highest terminal access success rate among the plurality of neighboring cell base stations. At this time, the network management apparatus NM10 notifies the network operator of the terminal connection success rate. For this method, all of the antenna configuration information (e.g., antenna RF transmission output value, antenna tilt value, and antenna gain value) determined in the four reset procedures are temporarily stored.

When the reconfiguration process for compensating the outgoing cell (e.g., Cell-A) is completed, the network management apparatus NM10 confirms that the neighboring cell (e.g., one neighboring cell) of the outgoing cell compensates the outgoing cell And stored in Table 3. Then, the network management apparatus NM10 transmits the antenna configuration information (e.g., the changed antenna RF transmission output value for the compensation of the outgoing cell, The antenna tilt value changed for the compensation of the cell, and the antenna gain value changed for compensation of the outer cell) are stored in Table 1.

4. Outside  How to Recover Peripheral Cells Compensated for Cell Region

When the outage cell is normally restored (i.e., restored from the outgoing state to the normal state), the network management apparatus NM10 resets the peripheral cell (s) compensated for the outgoing cell to a state before the outgoing cell is generated Restore.

Specifically, when the network management apparatus NM10 recognizes that the outage cell has been normally restored, the neighboring cell (s) compensating for the outage cell (or the compensating base station (s) providing it) have. And the network management device NM10 may request the compensating base station (s) to perform base station reconfiguration based on Table 1 (e.g., antenna reconfiguration). For example, the network management apparatus NM10 transmits the antenna configuration information of the corresponding compensated base station (s) registered in Table 1 (e.g., the antenna RF transmission output value before compensation, the antenna tilt value before compensation, Value) to the corresponding compensated base station (s). That is, the network management apparatus NM10 transmits the antenna reconfiguration based on the antenna configuration information (for example, the antenna RF transmission output value before compensation, the antenna tilt value before compensation, and the antenna gain value before compensation) stored in Table 1, May request from the base station (s). This allows the peripheral compensation cell (s) to be quickly restored to the state prior to compensating the outage cell.

8 is a diagram of a computing device, in accordance with an embodiment of the present invention.

The computing device TN100 of FIG. 8 may be a network management device NM10, a base station, a terminal, or the like, as described herein. Or the computing device TN100 of FIG. 8 may be a wireless device, a communication node, a transmitter, or a receiver.

In the embodiment of FIG. 8, the computing device TN100 may include at least one processor (TN 110), a transceiver (TN 120) in communication with the network, and a memory (TN 130). Further, the computing device TN100 may further include a storage device TN140, an input interface device TN150, an output interface device TN160, and the like. The components included in the computing device TN100 may be connected by a bus (TN170) and communicate with each other.

The processor TN110 may execute a program command stored in at least one of the memory TN130 and the storage device TN140. The processor TN110 may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to embodiments of the present invention are performed. The processor TN110 may be configured to implement the procedures, functions, and methods described in connection with the embodiments of the present invention. The processor TN110 may control each component of the computing device TN100.

Each of the memory TN130 and the storage device TN140 may store various information related to the operation of the processor TN110. Each of the memory TN130 and the storage device TN140 may be constituted of at least one of a volatile storage medium and a nonvolatile storage medium. For example, the memory TN130 may be configured with at least one of a read only memory (ROM) and a random access memory (RAM).

The transceiver apparatus TN120 can transmit or receive a wired signal or a wireless signal. And the computing device (TNlOO) may have a single antenna or multiple antennas.

On the other hand, the embodiments of the present invention are not only implemented by the apparatuses and / or methods described so far, but may also be realized through a program realizing a function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded And such an embodiment can be easily implemented by those skilled in the art from the description of the embodiments described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (20)

CLAIMS What is claimed is: 1. A method for compensating for a cell in an outage state,
Determining whether a state of the first cell is an outgoing state in which the terminal belonging to the first cell can not access the first cell;
Excluding a cell that is in an energy saving state or that is compensating for a cell different from the first cell among a plurality of neighboring cells existing in the vicinity of the first cell when the state of the first cell is an outgoing state;
Requesting performance information of the plurality of base stations to a plurality of base stations serving remaining cells other than the excluded cells among the plurality of neighboring cells; And
Selecting at least one compensation cell to participate in compensation of the first cell among the remaining cells based on performance information of the plurality of base stations
And an outlier cell compensating step of compensating the outage cell of the network management apparatus. The method according to claim 1,
The performance information of the plurality of base stations includes a central processing unit (CPU) occupancy rate of the plurality of base stations,
Wherein the selecting comprises:
Determining at least one first base station having a CPU occupancy rate lower than a first reference value among the plurality of base stations; And
Comparing the performance information with performance information of the at least one first base station
A method for compensating an outage cell of a network management device. 3. The method of claim 2,
Wherein the comparing comprises:
Determining whether the at least one first base station satisfies a condition defined by (performance information of the at least one first base station / performance reference information) < second reference value
A method for compensating an outage cell of a network management device. The method of claim 3,
Wherein the performance information of the at least one first base station includes a traffic load of the at least one first base station, a number of connected terminals of the at least one first base station, and a radio frequency (RF) / RTI &gt;
Wherein the performance reference information includes a maximum traffic load, a maximum number of connected terminals, and a maximum RF transmission output,
The condition is defined as a first condition defined by (a traffic load / a maximum traffic load) < a second condition defined by a second criterion, a number of connected terminals / RF transmission output) < a second criterion
A method for compensating an outage cell of a network management device. The method of claim 3,
Wherein the selecting comprises:
Further comprising the step of selecting four cells served by the four or more first base stations as compensation cells when the number of base stations satisfying the condition among the at least one first base station is four or more,
Two compensation cells of the four compensation cells are symmetrically located with respect to the first cell and the remaining two compensation cells are symmetrically positioned with respect to the first cell
A method for compensating an outage cell of a network management device. The method of claim 3,
Wherein the selecting comprises:
Selecting three cells served by the three first base stations as compensation cells when the number of base stations satisfying the condition among the at least one first base station is three; And
Further comprising the step of selecting two cells served by the two first base stations as compensation cells when the number of base stations satisfying the condition among the at least one first base station is two
A method for compensating an outage cell of a network management device. The method of claim 3,
Wherein the selecting comprises:
Activating a second cell in an energy saving state among the plurality of neighboring cells when the number of base stations satisfying the condition among the at least one first base station is one or less;
Requesting a base station serving the second cell for performance information of a base station serving the second cell; And
Further comprising determining whether a base station serving the second cell has a CPU occupation rate lower than the first reference value
A method for compensating an outage cell of a network management device. The method of claim 3,
Wherein the selecting comprises:
When the number of the base stations satisfying the condition is one among the at least one first base station, the one first base station (performance information of the one first base station / performance reference information) < Determining whether the defined additional condition is satisfied; And
Further comprising the step of selecting, as a compensation cell, one cell served by said one first base station, if said one first base station satisfies said additional condition,
The third reference value is smaller than the second reference value
A method for compensating an outage cell of a network management device. CLAIMS What is claimed is: 1. A method for compensating for a cell in an outage state,
When the state of the first cell is an outgoing state in which the terminal belonging to the first cell can not connect to the first cell, the first cell of the plurality of neighboring cells existing in the periphery of the first cell is compensated Selecting at least one compensation cell; And
Wherein two of the four compensation cells serve a portion of the area of the first cell when the number of the at least one compensation cells is four and the remaining two compensation cells of the four compensation cells Requesting the first base stations providing the four compensation cells to base station reconstruction so as to service the remainder of the first cell's area
And an outlier cell compensating step of compensating the outage cell of the network management apparatus. 10. The method of claim 9,
Two compensation cells of the four compensation cells are symmetrically located with respect to the first cell and the remaining two compensation cells are symmetrically positioned with respect to the first cell
A method for compensating an outage cell of a network management device. 10. The method of claim 9,
Wherein the step of requesting the first base stations to reconfigure the base station comprises:
Modifying the antenna configuration information of the first base stations to expand the coverage area of the four compensation cells; And
And requesting the first base stations for antenna reconfiguration based on the changed antenna configuration information,
The modified antenna configuration information includes an altered antenna RF transmission output value of the first base stations, a modified antenna tilt value of the first base stations, and a modified antenna gain value of the first base stations. doing
A method for compensating an outage cell of a network management device. 12. The method of claim 11,
Wherein the step of requesting the first base stations to reconfigure the base station comprises:
Further comprising storing antenna configuration information set for the first base stations prior to antenna reconfiguration for the first base stations
A method for compensating an outage cell of a network management device. 12. The method of claim 11,
Wherein the step of requesting the first base stations to reconfigure the base station comprises:
Wherein when the BS success rate of the UEs existing in the first cell region is equal to or greater than a first reference value, it is stored that the four compensation cells compensate the first cell, 1 &lt; / RTI &gt; base stations
A method for compensating an outage cell of a network management device. 12. The method of claim 11,
Wherein the step of requesting the first base stations to reconfigure the base station comprises:
When the base station connection success rate of the terminals in the first cell region is smaller than the first reference value, re-modifying the antenna configuration information of the first base stations and reconfiguring the antenna based on the re- Lt; RTI ID = 0.0 &gt;
A method for compensating an outage cell of a network management device. 10. The method of claim 9,
The third base stations controlling the three compensation cells are configured to perform base station reconfiguration such that the three compensation cells serve some or all of the regions of the first cell when the number of the at least one compensation cells is three, &Lt; / RTI &gt;
Further comprising the steps of: 16. The method of claim 15,
Wherein the step of requesting the second base stations for base station reconfiguration comprises:
Changing the antenna configuration information of the second base stations based on the relative positions of the three compensation cells with respect to the first cell, for expanding the area of the three compensation cells; And
And requesting the second base stations for antenna reconfiguration based on the modified antenna configuration information
A method for compensating an outage cell of a network management device. 10. The method of claim 9,
Modifying the antenna configuration information of the second base stations controlling the two compensation cells for region expansion of the two compensation cells when the number of the at least one compensation cells is two, Requesting the second base stations for antenna reconfiguration
Further comprising the steps of: 10. The method of claim 9,
Wherein if the number of the at least one compensation cell is one, the second base station controlling the one compensation cell satisfies a condition defined by (performance information / performance reference information of the second base station) <reference value ; And
If the second base station satisfies the condition, changes the antenna configuration information of the second base station to expand the area of the one compensation cell and requests the second base station to reconfigure the antenna based on the changed antenna configuration information Step
Further comprising the steps of: CLAIMS What is claimed is: 1. A method for compensating for a cell in an outage state,
When the state of the first cell is an outgoing state in which the terminal belonging to the first cell can not connect to the first cell, the first cell of the plurality of neighboring cells existing in the periphery of the first cell is compensated Selecting at least one compensation cell;
Storing antenna configuration information of at least one base station providing the at least one compensation cell as first antenna configuration information;
Modifying antenna configuration information of the at least one base station for expansion of the at least one compensation cell; And
Requesting the at least one base station to reconfigure an antenna based on the first antenna configuration information when the first cell is recovered from an outlier state to a steady state
And an outlier cell compensating step of compensating the outage cell of the network management apparatus. 20. The method of claim 19,
Wherein the modifying comprises:
And storing the modified antenna configuration information as second antenna configuration information,
Wherein the second antenna configuration information includes at least one of a changed antenna RF transmission output value of the at least one base station, a modified antenna tilt value of the at least one base station, and a modified antenna gain of the at least one base station gain value
A method for compensating an outage cell of a network management device.

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