Communication management device and radio resource prediction method

Abstract

To accurately predict radio resource usage in a radio communication system in which multiple cells can overlap each other.SOLUTION: A communication management device for managing radio communication in a radio communication system forming multiple cells, calculates, for all cells, an amount of radio resources to be provided for each sub-area within each cell, based on the number of cells covering each of a plurality of sub-areas obtained by dividing a designated area and radio resource usage of each cell. The communication management device calculates an amount of radio resources to be provided to each sub-area based on the calculation result.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an apparatus for managing wireless communication and a method for predicting the usage amount of wireless resources.

Background Art

[0002] Cell design for wireless communication is one of the important technologies for efficiently providing services. Cell design determines the placement of base stations and the operating status of each base station based on the traffic volume of each cell. For example, in an area where it is difficult to connect, it is required to add a base station. Also, in an area where multiple cells overlap, it is preferable to stop one or more base stations during a time period when the traffic volume is low in order to reduce power consumption. Note that methods for assisting in the area design of wireless communication have been proposed (for example, Patent Documents 1 and 2).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] In recent years, cells in a plurality of different frequency bands may overlap with each other, and cell design has become complicated. Also, in cases where high frequency bands are used in post-5G communication etc., the coverage of each cell is narrow. For this reason, it is required to detect places where locally large traffic occurs.

[0005] One object related to one aspect of the present invention is to accurately predict the usage amount of wireless resources for each fine-grained area in a wireless communication system in which the coverage of a plurality of cells may overlap with each other.

Means for Solving the Problem

[0006] A communication management device according to one aspect of the present invention is used in a wireless communication system that forms a plurality of cells. This communication management device includes, for each of a plurality of partial areas obtained by dividing a designated area, a first calculation unit that calculates the number of terminal devices located within the partial area, a second calculation unit that calculates the number of cells covering the partial area for each of the plurality of partial areas, a third calculation unit that calculates the number of terminal devices assigned to one cell based on the calculation result of the first calculation unit and the calculation result of the second calculation unit for each of the plurality of partial areas, a fourth calculation unit that calculates the amount of radio resources to be provided for each partial area within the cell based on the usage amount of radio resources in the cell and the calculation result of the third calculation unit for each of the plurality of cells, and a fifth calculation unit that calculates the amount of radio resources to be provided for the partial area based on the amount of radio resources calculated for each cell by the fourth calculation unit for each of the plurality of partial areas.

Advantages of the Invention

[0007] According to the above aspect, in a wireless communication system in which the coverages of a plurality of cells can overlap with each other, the usage amount of radio resources can be accurately predicted for each fine-grained area.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

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Figure 12

Embodiments for Carrying Out the Invention

[0009] FIG. 1 shows an example of a wireless communication system according to an embodiment of the present invention. The wireless communication system 1 according to an embodiment of the present invention includes, in this example, as shown in FIG. 1, a base station system 10, a RIC (RAN (Radio Access Network) Intelligence Controller) 20, and a core device 30. Note that the wireless communication system 1 is not particularly limited, but provides, for example, 5G services.

[0010] In this embodiment, the base station system 10 is a virtualized base station and is composed of a plurality of computers. The plurality of computers may be provided on the cloud. That is, the base station system 10 may be realized by cloud computing. Further, the base station system 10 includes software (vCU and vDU) that describes the operation of the base station. The vCU (virtual Central Unit) provides the functions of the CU, and the vDU (virtual Distributed Unit) provides the functions of the DU.

[0011] The base station system 10 includes a plurality of radio devices (RU: Radio Unit) 11. Each radio device 11 includes a radio transceiver and an antenna, and forms a cell according to the control by the corresponding vCU / vDU. The cell represents the range (i.e., coverage) within which the radio device 11 can communicate. Then, the radio device 11 communicates with the terminal device (UE: User Equipment) 2 located within the cell. Note that each radio device 11 can form a plurality of cells. Also, each cell is formed so as to overlap at least a part of one or more other cells.

[0012] The RIC 20 is composed of one or more computers and controls the optimization of resources and the automation of operation of the radio access network (i.e., RAN). Note that the RIC 20 may include a Non Real Time RIC and a Near Real Time RIC. The core device 30 connects the base station system 10 and the RIC 20 to the core network.

[0013] In the wireless communication system 1 having the above configuration, the communication management device 40 according to the embodiment of the present invention is, for example, implemented in the RIC 20. Here, when the RIC 20 includes a Non Real Time RIC and a Near Real Time RIC, the communication management device 40 is composed of the Non Real Time RIC.

[0014] The communication management device 40 acquires CM (Configuration Management) data and PM (Performance Management) data from the base station system 10. The CM data includes information related to the configuration of the base station system 10, information for managing radio resources, information for managing station data, information related to software updates, and the like. Therefore, the communication management device 40 can calculate the area covered by each cell provided by the base station system 10 based on the CM data. The PM data includes information representing the traffic of each network device in the base station system 10 and information representing the usage status of radio resources.

[0015] The communication management device 40 detects the position of each terminal device 2. The position of the terminal device 2 is not particularly limited, but for example, it is calculated using MDT (Minimization of Drive Test) data. MDT is one of the technologies for collecting QoE (Quality of Experience) information, and each terminal device notifies the base station of the position and cause of events such as disconnection of the wireless link during communication or failure of handover. Here, the MDT data is collected by the communication carrier at a predetermined period (for example, at 10-minute intervals). Note that MDT is described in, for example, 3GPP TS 37.320.

[0016] The communication management device 40 may detect the position of the terminal device 2 by other methods. For example, the communication management device 40 may detect the position of the terminal device 2 by the following method. Alternatively, the communication management device 40 may detect the position of the terminal device 2 using GPS (Global Positioning System) data. Location Services (3GPP TS 23.273) Positioning Services (3GPP TS 22.261) OTDOA positioning (3GPP TS 36.305)

[0017] Then, based on the CM data, PM data, and the location information of the terminal device 2, the communication management device 40 predicts the usage status of radio resources in each cell (or the radio traffic of each cell). In addition, the communication management device 40 predicts the usage status of radio resources for each of a plurality of sub-areas obtained by dividing the designated prediction target area. At this time, the communication management device 40 predicts the usage status of radio resources based on past CM / PM data and location data. For example, the usage status of radio resources is predicted for each time period (such as 0:00 - 6:00, 6:00 - 12:00, 12:00 - 18:00, 18:00 - 24:00, etc.) within a day. Alternatively, the usage status of radio resources may be predicted for each day of the week (such as Monday - Friday, Saturday - Sunday, etc.).

[0018] FIG. 2 shows an example of the functional configuration of the communication management device 40 according to an embodiment of the present invention. The communication management device 40 includes a data collection unit 50 and a prediction unit 60. However, the communication management device 40 may further include other functions not shown in FIG. 2.

[0019] The data collection unit 50 includes a CM / PM data collection unit 51 and a location data collection unit 52. The CM / PM data collection unit 51 collects CM data and PM data from the base station system 10 shown in FIG. 1. As described above, the CM data includes information related to the configuration of the base station system 10, information for managing radio resources, information for managing station data, information related to software updates, etc. Therefore, the communication management device 40 can calculate the area covered by each cell formed by the base station system 10 based on the CM data. Also, as described above, the PM data includes information representing the traffic of each network device in the base station system 10 and information representing the usage status of radio resources. Note that the CM / PM data collection unit 51 collects CM data and PM data at a predetermined cycle over a predetermined period. For example, the CM / PM data collection unit 51 may collect location data at 10 - minute intervals over a one - week period. The CM data and PM data collected by the CM / PM data collection unit 51 are stored in a memory (not shown).

[0020] The location data collection unit 52 collects location data representing the location of the terminal device 2. At this time, the location data collection unit 52 collects location data at a predetermined cycle over a predetermined period. For example, the location data collection unit 52 may collect location data at 10-minute intervals over one week. Also, the location data collection unit 52 may collect the location data of all the terminal devices 2 within the communication area of the base station system 10, or may collect the location data of some of the terminal devices 2 within the communication area of the base station system 10. For example, the location data collection unit 52 collects the MDT data of the terminal device 2. Here, MDT notifies the base station of the location of the terminal device 2 in which an event such as disconnection of a radio link or failure of handover has occurred. Therefore, the MDT data represents the locations of some of the terminal devices 2 within the communication area of the base station system 10. The location data collected by the location data collection unit 52 is stored in a memory (not shown).

[0021] The prediction unit 60 includes a UE location detection unit 61, a mesh unit_UE number calculation unit (first calculation unit) 62, a mesh unit_cell number calculation unit (second calculation unit) 63, a mesh / cell unit_UE number calculation unit (third calculation unit) 64, a cell unit_used resource calculation unit (fourth calculation unit) 65, and a mesh unit_used resource calculation unit (fifth calculation unit) 66. Then, the prediction unit 60 predicts the amount of radio resource usage (or radio traffic) based on the CM data, PM data, and location data collected by the data collection unit 50.

[0022] In addition to the CM data, PM data, and location data, map data and mesh information are provided to the prediction unit 60. The map data represents the terrain and the like of the communication area of the base station system 10. The mesh information defines meshes for dividing the prediction target area into a plurality of sub-areas. The prediction target area represents an area in which the communication management device 40 predicts the usage amount of radio resources. In this embodiment, the sub-areas are square. In this case, the meshes divide the prediction target area into a plurality of squares. In the example shown in FIG. 3, the prediction target area is divided into 20 sub-areas A1 to A20. That is, the plurality of sub-areas constitute the meshes. Also, the shapes of the plurality of sub-areas are the same as each other. The size of each sub-area is not particularly limited, but for example, it is 100 meters × 100 meters. And the meshes represented by the mesh information are superimposed on the map data. In the following description, the calculation results of the prediction unit 60 may be described only for the sub-areas A5 to A7, A9 to A11, and A14 to A15 within the target area surrounded by the thick line in FIG. 3.

[0023] Based on the CM data, PM data, and location data collected at a predetermined cycle over a predetermined period (for example, one week), the prediction unit 60 predicts the usage amount of radio resources to be provided by the base station system 10. At this time, the prediction unit 60 may predict the usage amount of radio resources for each of a plurality of time zones. For example, the usage amount of radio resources is predicted for 0:00 to 1:00, 1:00 to 2:00, ···, 23:00 to 24:00, respectively. Also, when the traffic volume depends on the day of the week, the prediction unit 60 may predict the usage amount of radio resources for each day of the week.

[0024] Based on the location data collected by the data collection unit 50, the UE location detection unit 61 detects the location of each terminal device 2. Here, as described above, the location data is collected at a predetermined cycle. Therefore, the location of each terminal device 2 detected by the UE location detection unit 61 is recorded in association with the collection time of the location data.

[0025] The number-of-UEs calculation unit 62 per mesh calculates the number of terminal devices 2 located in each sub-area based on the map data, mesh information, and the positions of each terminal device 2 detected by the UE position detection unit 61. Here, the positions and sizes of the sub-areas are defined by the map data and the mesh information. Also, the positions of each terminal device 2 are detected by the UE position detection unit 61. Therefore, the number-of-UEs calculation unit 62 per mesh can calculate the number of terminal devices 2 located in each sub-area. Also, the number-of-UEs calculation unit 62 per mesh calculates the number of terminal devices 2 located in each sub-area for a plurality of time periods.

[0026] FIG. 4 shows an example of the calculation result by the number-of-UEs calculation unit 62 per mesh. In this embodiment, for example, at 0:00 on March 7, three terminal devices 2 are located in sub-area A5, and ten terminal devices 2 are located in sub-area A7. Note that "0:00 on March 7" may mean a time period including 0:00 on March 7 (for example, 0:00 to 1:00 on March 7). In this case, the number of terminal devices 2 represents the number of terminal devices 2 detected in the time period.

[0027] When using MDT data as the location data, the number of terminal devices 2 calculated for each sub-area may be reduced. For example, even if one or more terminal devices 2 are actually located in a certain sub-area, if no link disconnection or handover failure occurs, there is a possibility that the terminal devices 2 will not be detected. Therefore, the number-of-UEs calculation unit 62 per mesh may determine the number of terminal devices 2 located in each sub-area by using the complement processing described later.

[0028] For example, during the time period TZ within the data collection period, the number of terminal devices 2 located in one sub-area (hereinafter, sub-area Z) among the prediction target areas is obtained by the following complement processing. Number of terminal devices 2 = (Z1 / Z2) × Z3 Z1: The sum of the values calculated for the partial area Z based on the position data obtained in each data collection time period within the data collection period (for example, one week). (When collecting position data at 10 - minute intervals, 1008 sets of position data are collected during a one - week data collection period, so the sum of 1008 values is calculated.) Z2: The sum of the values calculated for the entire prediction target area based on the position data obtained in each data collection time period within the data collection period Z3: The value calculated for the entire prediction target area based on the position data obtained in the time period TZ

[0029] For example, assume that Z1 is 3, Z2 is 10000, and Z3 is 300. In this case, the number of terminal devices 2 located within the partial area Z in the time period TZ is 0.09. Note that the above - mentioned complement processing may be executed for each of all partial areas, or may be executed only for the partial areas where the calculated number of terminal devices 2 is zero.

[0030] The mesh - unit cell number calculation unit 63 calculates the number of cells covering each partial area. Here, the radio wave range of each cell is known from the CM data obtained from the base station system 10. Alternatively, the mesh - unit cell number calculation unit 63 may determine the radio wave range of each cell by measurement.

[0031] In this embodiment, the base station system 10 forms 5 cells (cells A - E) shown in Fig. 5A for the prediction target area. The radio wave range of a cell represents, for example, an area where the reception level of the radio wave transmitted from the base station is higher than a predetermined threshold value. Alternatively, the radio wave range of a cell represents an area where communication with the base station is possible.

[0032] In this embodiment, the radio wave range of cell A covers partial areas A6 - A7, A10 - A11, and A14 - A15. The radio wave range of cell B covers partial areas A1 - A2, A5 - A7, A9 - A10, A13 - A15, and A17 - A18. The radio wave range of cell C covers partial areas A3 - A4, A7 - A8, A11 - A12, and A15 - A16. The radio wave range of cell D covers partial areas A5, A9, A13, and A17. The radio wave range of cell E covers partial areas A3 - A4, A7 - A8, A10 - A12, A15 - A16, and A19 - A20.

[0033] The mesh unit_cell number calculation unit 63 counts the number of cells covering each partial area for each partial area. For example, partial area A5 is covered by cells B and D. Therefore, the number of cells covering partial area A5 is "2". Also, partial area A7 is covered by cells A, B, C, and E. Therefore, the number of cells covering partial area A7 is "4". Similarly, as shown in FIG. 5B, the mesh unit_cell number calculation unit 63 counts the number of cells covering each partial area for each partial area.

[0034] The Mesh / Cell Unit UE Count Calculation Unit 64 calculates the number of terminal devices 2 assigned to each cell for each partial area. Specifically, the number of terminal devices 2 for which one cell should provide radio resources is calculated. Here, the number of terminal devices 2 located within each partial area has been calculated by the Mesh Unit UE Count Calculation Unit 62 as described with reference to FIG. 4. Also, the number of cells covering each partial area has been calculated by the Mesh Unit Cell Count Calculation Unit 63 as described with reference to FIG. 5. Therefore, the Mesh / Cell Unit UE Count Calculation Unit 64 can calculate the number of terminal devices 2 assigned to one cell by dividing the calculation result of the Mesh Unit UE Count Calculation Unit 62 (i.e., the number of terminal devices 2) by the calculation result of the Mesh Unit Cell Count Calculation Unit 63 (i.e., the number of cells) for each partial area. Alternatively, the number of terminal devices 2 assigned to one cell may be determined by referring to a table that determines the number of terminal devices 2 assigned to one cell based on the calculation result of the Mesh Unit UE Count Calculation Unit 62 (i.e., the number of terminal devices 2) and the calculation result of the Mesh Unit Cell Count Calculation Unit 63 (i.e., the number of cells).

[0035] In the case shown in FIG. 6, for example, from 0:00 to 1:00 on March 7, three terminal devices 2 are located within partial area A5. On the other hand, partial area A5 is covered by two cells (in the example shown in FIG. 5A, cell B and cell D). In this case, the terminal devices 2 located within partial area A5 use the radio resources provided by cell B or cell D. Therefore, in partial area A5, the average value of the number of terminal devices 2 assigned to one cell is 1.5. Also, from 12:00 to 13:00 on March 7, forty terminal devices 2 are located within partial area A7. On the other hand, partial area A7 is covered by four cells (in the example shown in FIG. 5A, cell A, cell B, cell C, and cell E). In this case, the terminal devices 2 located within partial area A7 use the radio resources provided by cell A, cell B, cell C, or cell E. Therefore, in partial area A7, the average value of the number of terminal devices 2 assigned to one cell is 10.

[0036] Subsequently, the mesh / cell unit UE number calculation unit 64 calculates the number of terminal devices 2 assigned to each cell. Specifically, the number of terminal devices 2 for which each cell should provide radio resources is calculated. Here, the number of terminal devices 2 assigned to one cell for each partial area has already been calculated. Therefore, for the partial areas covered by the target cell, the number of terminal devices 2 assigned to the target cell can be obtained by calculating the sum of the numbers of terminal devices 2 assigned to one cell.

[0037] For example, as shown in FIG. 5A, cell A covers partial areas A6 to A7, A10 to A11, and A14 to A15. Therefore, the number of terminal devices 2 assigned to cell A can be obtained by adding up the numbers of terminal devices 2 assigned to partial areas A6 to A7, A10 to A11, and A14 to A15, respectively, as shown in FIG. 7.

[0038] In this embodiment, at 0:00 to 1:00 on March 7, the numbers of terminal devices 2 assigned to one cell in each of partial areas A6, A7, A10, A11, A14, and A15 are 2, 2.5, 1.3, 0.6, 2, and 2.5, respectively. Therefore, the number of terminal devices 2 assigned to cell A during this time period is 10.9. Also, at 12:00 to 13:00 on March 7, the numbers of terminal devices 2 assigned to one cell in each of partial areas A6, A7, A10, A11, A14, and A15 are 1, 10, 4.3, 10, 1, and 10, respectively. Therefore, the number of terminal devices 2 assigned to cell A during this time period is 36.3. Similarly, the mesh / cell unit UE number calculation unit 64 calculates the number of terminal devices 2 assigned to each cell for a plurality of time periods within the data collection period.

[0039] The cell unit resource usage calculation unit 65 calculates (or predicts) the amount of radio resources to be provided for each partial area for each cell. Here, the usage amount of radio resources in each cell is represented by PM data notified from the base station system 10. Alternatively, based on the PM data notified from the base station system 10, the usage amount of radio resources in each cell can be calculated. Also, as described with reference to FIGS. 6 to 7, the ratio of the number of terminal devices 2 located within the partial area covered by each cell is calculated by the mesh / cell unit UE number calculation unit 64. Therefore, based on this information, for each cell, the amount of radio resources to be provided for each partial area can be calculated.

[0040] For example, assume that the radio communication bandwidth of cell A is 20 MHz. Also, assume that from 0:00 to 1:00 on March 7, the average usage rate of radio resources in cell A was 20 percent. That is, assume that the average usage amount of radio resources in cell A during this time period was 4 MHz. Note that this information is obtained based on, for example, PM data. On the other hand, the ratio of the number of terminal devices 2 located within the partial areas (A6, A7, A10, A11, A14, A15) covered by cell A is "2:2.5:1.3:0.6:2:2.5" as shown in FIG. 7.

[0041] In this case, by distributing "4 MHz" to each partial area according to the above ratio, the amount of radio resources to be provided for each partial area is calculated. For example, the amount of radio resources R6 to be provided for partial area A6 is calculated by the following formula. R6 = (2 / 10.9) × 4 = 0.74 [MHz] Also, the amount of radio resources R7 to be provided for partial area A7 is calculated by the following formula. R7 = (2.5 / 10.9) × 4 = 0.93 [MHz]

[0042] Similarly, as shown in FIG. 8, for other partial areas A10 to A11, A14 to A15, the amount of radio resources to be provided is also calculated. Further, as shown in FIG. 9, for other cells (i.e., cell B to cell E), the amount of radio resources to be provided is calculated for each partial area. In the examples shown in FIGS. 8 to 9, the calculation results are shown only for the partial areas A5 to A7, A9 to A11, A14 to A15 within the target area surrounded by the thick line in FIG. 3.

[0043] The mesh unit_used resource calculation unit 66 calculates (or predicts) the total amount of radio resources to be provided for each partial area in consideration of cell overlap. Here, the amount of radio resources to be provided for each cell is calculated by the cell unit_used resource calculation unit 65. Therefore, by adding up the amounts of radio resources to be provided for each cell for each partial area, the total amount of radio resources to be provided for each partial area is calculated.

[0044] For example, the partial area A5 is covered by cell B and cell D. Here, as shown in FIG. 9, from 0:00 to 1:00 on March 7, the terminal device 2 within the partial area A5 is provided with 0.75 MHz of radio resources from cell B and 3 MHz of radio resources from cell D. Therefore, a total of 3.75 MHz of radio resources are provided to the terminal device 2 within the partial area A5. In other words, in this time period, the partial area A5 requires 3.75 MHz of radio resources.

[0045] In addition, the partial area A7 is covered by cell A, cell B, cell C, and cell E. Here, as shown in FIGS. 8 and 9, from 0:00 to 1:00 on March 7th, the terminal device 2 in the partial area A7 is provided with 0.93 MHz of radio resources from cell A, 1.25 MHz of radio resources from cell B, 2.5 MHz of radio resources from cell C, and 5.0 MHz of radio resources from cell E. Therefore, a total of 9.68 MHz of radio resources are provided to the terminal device 2 in the partial area A7. In other words, in this time period, the partial area A7 requires 9.68 MHz of radio resources.

[0046] Similarly, as shown in FIG. 10, for other partial areas, the total amount of radio resources to be provided is also calculated. Furthermore, for other time periods, for each partial area, the total amount of radio resources to be provided is calculated. In the example shown in FIG. 10, the calculation results are only shown for the partial areas A5 - A7, A9 - A11, and A14 - A15 within the target area surrounded by the thick line in FIG. 3.

[0047] In this way, the communication management device 40 according to the embodiment of the present invention calculates or predicts the total resource amount by adding up the amount of radio resources that each cell should provide, considering the overlap of multiple cells, for each of the plurality of divided areas obtained by dividing the designated area. Therefore, by using this result, even in a case where multiple cells overlap with each other, it is possible to predict the position where the traffic becomes locally large.

[0048] In addition, the communication management device 40 calculates the total amount of radio resources to be provided to each divided area based on the data periodically collected over a predetermined period. Therefore, it is possible to accurately predict the position where the traffic becomes large at a specific time period or on a specific day of the week.

[0049] Furthermore, the communication management device 40 may control the base station system 10 based on this prediction. For example, when it is predicted that the traffic in a certain partial area will temporarily decrease, the communication management device 40 may stop one or more of the cells covering that partial area. Thereby, the power consumption of the base station system 10 can be reduced while maintaining wireless communication.

[0050] Alternatively, the communication management device 40 may propose a change in the configuration of the base station system 10 based on this prediction. For example, when it is predicted that the traffic in a certain partial area will continuously increase, the communication management device 40 may propose adding a cell covering that partial area.

[0051] FIG. 11 is a flowchart showing an example of a wireless resource prediction method according to an embodiment of the present invention. The processing of this flowchart is executed by the communication management device 40 shown in FIG. 2, for example, in response to an instruction from a user. Also, in this embodiment, it is assumed that the above-described CM data, PM data, and position data are collected at a predetermined cycle over a predetermined period and stored in a storage device provided in the communication management device 40.

[0052] In S1, the communication management device 40 calculates the number of terminal devices 2 located within each partial area based on the position data representing the positions of the terminal devices 2. The position data is not particularly limited, but for example, it is MDT data. In S2, the communication management device 40 calculates the number of cells covering each partial area based on the CM data collected from the base station system 10. That is, the number of cells overlapping each partial area is counted. In S3, the communication management device 40 calculates, for each partial area, the number of terminal devices assigned to one cell based on the calculation results of S1 and S2. In S4, the communication management device 40 calculates the amount of radio resources to be provided for each partial area within each cell based on the calculation result of S3 and the PM data (for example, the radio resource usage amount of each cell) collected from the base station system 10. In S5, the communication management device 40 calculates the total amount of radio resources to be provided for each partial area using the calculation result of S4. At this time, for each partial area, the total amount of radio resources to be provided for each partial area is calculated by adding up the amounts of radio resources that each cell should provide.

[0053] As described above, according to the radio resource prediction method according to the embodiment of the present invention, the total amount of radio resources to be provided for each partial area is calculated in consideration of the overlapping of a plurality of cells. Therefore, by using this result, even in a case where a plurality of cells are formed by overlapping each other, it is possible to predict a position where the traffic becomes locally large or a position where the traffic becomes locally small, and thus an efficient cell design can be realized.

[0054] <Hardware Configuration> FIG. 12 shows an example of the hardware configuration of the communication management device 40. The communication management device 40 is realized by a computer 200 including a processor 201, a memory 202, a storage device 203, an input / output device 204, a recording medium reader 205, and a communication interface 206.

[0055] The processor 201 controls the operation of the communication management device 40 by executing the communication management program stored in the storage device 203. The communication management program includes program codes describing the procedures of the flowchart shown in FIG. 11. Therefore, by the processor 201 executing this program, the functions of the UE position detection unit 61, the mesh unit_UE number calculation unit 62, the mesh unit_cell number calculation unit 63, the mesh / cell unit_UE number calculation unit 64, the cell unit_used resource calculation unit 65, and the mesh unit_used resource calculation unit 66 shown in FIG. 2 are provided. The memory 202 is used as a working area for the processor 201. The storage device 203 stores the communication management program and other programs. The data collected by the data collection unit 50 is stored in the memory 202 or the storage device 203.

[0056] The input / output device 204 may include input devices such as a keyboard, a mouse, a touch panel, and a microphone. Also, the input / output device 204 may include output devices such as a display device and a speaker. The recording medium reader 205 can acquire the data and information recorded on the recording medium 210. The recording medium 210 is a removable recording medium detachable from the computer 200. Also, the recording medium 210 is realized by, for example, a semiconductor memory, a medium that records signals by optical action, or a medium that records signals by magnetic action. Note that the communication management program may be provided to the computer 200 from the recording medium 210. The communication interface 206 provides a function of connecting to a network. When the communication management program is stored in the program server 220, the computer 200 may acquire the communication management program from the program server 220.

Explanation of Signs

[0057] 1 Wireless communication system 2 Terminal device 10 Base station system 20 RIC 40 Communication management device 50 Data collection unit 51 CM / PM data collection unit 52 Location data collection unit 60 Prediction unit 61 UE location detection unit 62 Mesh unit - UE count calculation unit 63 Mesh unit - cell count calculation unit 64 Mesh / cell unit - UE count calculation unit 65 Cell unit - used resource calculation unit 66 Mesh unit - used resource calculation unit

Claims

1. A communication management device used in a wireless communication system that forms a plurality of cells, comprising: a first calculation unit that calculates the number of terminal devices located within each of a plurality of partial areas obtained by dividing a designated area; a second calculation unit that calculates the number of cells covering each of the plurality of partial areas; a third calculation unit that calculates the number of terminal devices assigned to one cell based on the calculation result of the first calculation unit and the calculation result of the second calculation unit for each of the plurality of partial areas; a fourth calculation unit that calculates the amount of radio resources to be provided for each partial area within a cell based on the usage amount of radio resources in the cell and the calculation result of the third calculation unit for each of the plurality of cells; a fifth calculation unit that calculates the amount of radio resources to be provided for each partial area based on the amount of radio resources calculated for each cell by the fourth calculation unit for each of the plurality of partial areas; A communication management device comprising the above.

2. The third calculation unit calculates the number of terminal devices assigned to one cell by dividing the calculation result of the first calculation unit by the calculation result of the second calculation unit for each partial area. The communication management device according to claim 1, characterized in that.

3. The fourth calculation unit: For each cell, based on the calculation result of the third calculation unit, determines the ratio of radio resources to be allocated to each partial area within the cell, And calculates the amount of radio resources to be provided for each partial area within the cell by distributing the usage amount of radio resources in the cell to the corresponding partial areas according to the determined ratio. The communication management device according to claim 1, characterized in that.

4. The fifth calculation unit calculates the amount of radio resources to be provided for each partial area by adding up the amounts of radio resources provided by the cells covering the partial area. The communication management device according to claim 1, characterized in that.

5. Further comprising a data collection unit that collects position data representing the positions of terminal devices used in the wireless communication system, The first calculation unit calculates the number of terminal devices located within each partial area based on the position data. The communication management device according to claim 1, characterized in that.

6. The communication management device further includes a data collection unit that collects configuration management data representing the configuration of the base station system of the wireless communication system. The second calculation unit calculates the number of cells covering each partial area based on the configuration management data. The communication management device according to claim 1, characterized in that.

7. The communication management device further includes a data collection unit that collects performance management data representing the performance of the base station system of the wireless communication system. The fourth calculation unit detects the amount of radio resources used in each cell based on the performance management data. The communication management device according to claim 1, characterized in that.

8. A method for predicting radio resources used in a wireless communication system forming a plurality of cells, comprising: a first procedure for calculating the number of terminal devices located within each of a plurality of partial areas obtained by dividing a specified area; a second procedure for calculating the number of cells covering each of the plurality of partial areas; a third procedure for calculating the number of terminal devices assigned to one cell based on the calculation result of the first procedure and the calculation result of the second procedure for each of the plurality of partial areas; a fourth procedure for calculating the amount of radio resources to be provided for each partial area within each cell based on the amount of radio resources used in the cell and the calculation result of the third procedure for each of the plurality of cells; a fifth procedure for calculating the amount of radio resources to be provided for each partial area based on the amount of radio resources calculated by the fourth procedure for each of the plurality of partial areas; A radio resource prediction method including the above.

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