WO2022269842A1 - 制御装置、通信システム、制御方法、及びプログラム - Google Patents
制御装置、通信システム、制御方法、及びプログラム Download PDFInfo
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- WO2022269842A1 WO2022269842A1 PCT/JP2021/023871 JP2021023871W WO2022269842A1 WO 2022269842 A1 WO2022269842 A1 WO 2022269842A1 JP 2021023871 W JP2021023871 W JP 2021023871W WO 2022269842 A1 WO2022269842 A1 WO 2022269842A1
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- base station
- communication quality
- coverage area
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- 238000004891 communication Methods 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims description 9
- 238000004364 calculation method Methods 0.000 claims description 23
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- 238000010586 diagram Methods 0.000 description 4
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- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
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- 238000005094 computer simulation Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/005—Moving wireless networks
Definitions
- the present invention relates to a method of controlling a base station in a wireless communication system.
- Non-Patent Document 1 Japanese Patent Document 1
- the present invention has been made in view of the above points, and aims to provide a technology that makes it possible to improve the communication quality across the board even in an environment with moving shields.
- the control device in a communication system comprising a control device and a mobile base station, an information acquisition unit that acquires shielding object sensing information; a shield map generation unit that generates a shield map based on the shield sensing information; Based on the shielding object map, for each position and direction of the antenna of the mobile base station, the estimated received power at each coverage area element or each terminal is calculated, and based on the estimated received power, each coverage area element or each terminal a communication quality calculation unit that calculates an estimated communication quality in a terminal and calculates an index value for controlling the mobile base station based on the estimated communication quality; A base station control unit for controlling the position and direction of the antenna of the movable base station so that the index value is maximized.
- FIG. 2 is a diagram for explaining mobile base station 100.
- FIG. It is a figure which shows the structure of each apparatus in a communication system.
- 4 is a flow chart for explaining the operation of the communication system; It is a figure which shows the example of the relationship between RSSI and MCS.
- FIG. 4 is a diagram for explaining a cover area element;
- FIG. It is a figure which shows the hardware configuration example of an apparatus.
- control is performed by the control device 300, which will be described later.
- the outline of control is as follows.
- the control device 300 Based on shielding object detection information (created from camera image information and LiDAR information), the control device 300 propagates to each coverage area element (or each terminal) for each combination of position and direction parameters of the antennas of mobile base stations. A loss is obtained using a ray tracing simulation or the like.
- control device 300 uses the relationship between the radio field intensity (RSSI or RSRP) and the communication quality (MCS or throughput) obtained in advance, and the propagation loss described above to determine each coverage area element (or each terminal) Calculate the estimated throughput (or estimated MCS) at .
- RSSI or RSRP radio field intensity
- MCS or throughput communication quality
- control device 300 calculates the total value E of the estimated throughput (or the coding rate corresponding to the estimated MCS, etc.) over the coverage area (or all terminals), and calculates the antenna position/direction parameter that maximizes this E. Then, the mobile base station is controlled using the calculated position/direction parameters.
- the present invention can be applied to any wireless communication system.
- this embodiment mainly assumes a wireless communication system such as 5G, and particularly a wireless communication system using a highly straight frequency such as Above-6 GHz.
- FIG. 1 shows an example of the overall configuration of a communication system according to this embodiment.
- this communication system includes a movable base station 100-1, a movable base station 100-2, a shield sensor 10, a shield 20, a plurality of terminals 200-1 to 200-3, and a control device 300.
- the shield sensor 10 may be any sensor as long as it can detect a shield.
- the shield sensor 10 is, for example, a camera, LiDAR, or the like.
- the shield 20 may be a fixed object or a moving object. As the shielding object 20, for example, materials, machines, shelves, people, etc. in the factory are assumed.
- Each of the terminals 200-1 to 200-3 is a terminal having a function of wirelessly communicating with the mobile base station 100.
- the control device 300 controls the mobile base station 100.
- the control device 300 may be placed near the mobile base station 100 or may be placed far away via a network. Also, the control device 300 may be provided in the mobile base station 100 .
- a wired connection or a wireless connection may be used between the mobile base station 100 and the control device 300 .
- the movable base station 100 is a base station that can move the movable part 105, which is a part including an antenna serving as a transmission/reception point of radio signals.
- the orientation of the antenna is also variable.
- the movable section 105 may include an antenna, and may include functional sections other than the antenna.
- the movable part 105 may be the antenna itself.
- the position of the movable section 105 can be changed in the direction indicated by reference numeral 112 by sliding the movable section 105 on the rail. You can also rotate the rail horizontally. This movement control allows the movable part 105 to be arranged at any position within a predetermined range.
- the structure supporting the movable part 105 is used to move the movable part 105 around the x-axis (see reference numeral 113), around the y-axis (see reference numeral 114), and around the z-axis (see reference numeral 115). can be rotated to This movement control allows the antenna to be oriented in any direction.
- a mobile base station 100 that slides on rails as described above is merely an example. Any method may be used as long as the position and direction of the antenna provided in the base station can be changed.
- the base station may be mounted on a drone or AGV (automated guided vehicle) to control the position and direction of the antenna of the base station, or the position and direction of the antenna of the base station may be manually controlled. .
- AGV automated guided vehicle
- FIG. 1 shows an example in which only mobile base station 100 exists as a base station
- base stations without mobile functions and mobile base stations may be used in combination.
- the position/direction parameters can be optimized in the same manner as when only the mobile base station 100 is used. It can be carried out.
- FIG. 3 shows the configuration of each device that constitutes the communication system according to this embodiment.
- FIG. 3 shows an example in which k mobile base stations 100-1 to 100-k are provided. 1 to k are described as "mobile base station 100" when they are not distinguished from each other. Also, there are multiple terminals 200 .
- a shield sensing unit 400 shown in FIG. 3 corresponds to the shield sensor 10 in FIG.
- the shield sensing unit 400 may be a functional unit included in the control device 300 .
- the mobile base station 100 has an operation mechanism section 110 , a radio transmission/reception section 120 and a signal demodulation section 130 .
- the operating mechanism section 110 is a mechanism for operating the movable section 105 described above.
- the operating mechanism section 110 may be called an actuator.
- the movable section 105 may be the radio transmitting/receiving section 120 .
- the radio transmission/reception unit 120 has an antenna and transmits and receives radio signals.
- Signal demodulator 130 receives an uplink signal from radio transmitter/receiver 120 , demodulates it, and transmits it to control device 300 .
- the terminal 200 includes a wireless transmission/reception unit 210 , a position information acquisition unit 220 and an obstacle sensing unit 230 .
- the radio transmission/reception unit 210 transmits and receives radio signals.
- Positional information acquisition unit 220 acquires positional information of terminal 200 itself.
- the shield sensing unit 230 detects shields.
- the shield sensing unit 230 may be a camera, a LiDAR, or other sensors.
- the location information acquisition unit 220 transmits the location information to the mobile base station 100 using the uplink data channel (or control channel). , and mobile base station 100 transmits the location information to control device 300 .
- the terminal 200 does not have to include the location information acquisition unit 220. In that case, control device 300 or mobile base station 100 estimates the terminal position using camera images or the like.
- Shield sensing is performed by the shield sensing unit 400 provided separately from the terminal 200. However, if the terminal 200 includes the shield sensing unit 230, the shield sensing unit 230 may notify the control device 300 of sensing information (camera image, RiDAR information, etc.) using an upstream signal. The terminal 200 may not include the shield sensing unit 230 .
- the control device 300 includes a communication quality calculator 310 , a shield map generator 320 , an information acquirer 330 , a base station controller 340 and a memory 350 .
- the outline of each part is as follows.
- the information acquisition unit 330 acquires shielding object sensing information, position information of the terminal 200, the relationship between radio wave intensity and communication quality, and the like.
- the shielding object map generator 320 detects the shielding object based on the shielding object sensing information, generates a 3D (or 2D) map, and stores the information in the storage unit 350 .
- the communication quality unit 310 calculates propagation loss, estimated received power, estimated MCS, estimated throughput, etc., and stores the calculated information in the storage unit 350 .
- the base station control unit 340 performs movement control and the like for the movable base station 100 .
- S101 Relation Acquisition>
- the information acquisition unit 330 acquires the relationship between radio wave intensity (RSSI or RSRP) and communication quality (throughput or MCS) by actual device measurement (or by referring to computer simulation or device specifications), and stores it in the storage unit. 350.
- RSSI or RSRP radio wave intensity
- MCS communication quality
- the value of the corresponding code rate or the value quantified as the MCS index is used as the MCS (Modulation and Coding Scheme).
- MCS Modulation and Coding Scheme
- Spectral Efficiency or MCS index in Table 5.1.3.1-1-3 of 3GPP TS 38.214 can be used.
- a larger MCS index indicates better communication quality.
- FIG. 5 shows an example of the relationship between RSSI and MCS in DL.
- the information acquisition unit 330 acquires the shield sensing information (camera image information, LiDAR information, etc.) obtained by the shield sensing unit 400 and stores it in the storage unit 350 .
- the shielding object map generating unit 320 detects the shielding object in real time based on the shielding object sensing information (camera image information, LiDAR information, etc.) acquired in S102, and generates a 3D map (or 2D map). .
- the 3D map contains three-dimensional positional information of the shielding objects.
- the 2D map contains two-dimensional positional information of the occluder.
- the communication quality calculation unit 310 obtains the propagation loss L to the coverage area element for each antenna position/direction parameter for each mobile base station by ray trace simulation or the like.
- a coverage area element is, as shown in FIG. 6, a small area when an area (coverage area) covered by multiple base stations to be controlled is divided into small areas.
- FIG. 6 is a diagram showing an example of coverage areas when mobile base stations 100-1 and 100-2 are present.
- one mobile base station 100 is assumed to have parameters 1 to n indicating the position and direction of the antenna.
- One parameter m for example, consists of ⁇ xm , ym , zm , pm , cm , rm ⁇ .
- x m , y m , and z m are the x, y, and z coordinates of the center position of the antenna, respectively
- p m , cm , and r m are the pan, tilt, and roll angles of the antenna, respectively. .
- the communication quality calculation unit 310 calculates the propagation loss L from the mobile base station 100 to each coverage area element for each parameter, and stores the following information in the storage unit 350, for example.
- the above information is stored in the storage unit 350 for each mobile base station 100 that exists in multiple units.
- the communication quality calculation unit 310 calculates estimated received power (RSSI, RSRP, etc.) from transmission power P-propagation loss L for each mobile base station 100, for each parameter, and for each coverage area element.
- the communication quality calculation unit 310 calculates the estimated received power calculated in S105 based on the correspondence relationship between the radio wave intensity (received power) and the communication quality obtained in S101 for each parameter and for each coverage area element, and calculates the estimated throughput (or Estimated MCS).
- parameters are parameters that combine the parameters of multiple mobile base stations.
- mobile base stations 100-1 and 100-2 exist, and at the stage of S105, estimated received power for each coverage area element is obtained for each of parameters 1-1 to 1-n of mobile base station 100-1. and the estimated received power for each coverage area element is obtained for each of parameters 2-1 to 2-n of mobile base station 100-2.
- Each parameter in parameters 1-1 to 1-n and parameters 2-1 to 2-n is, for example, ⁇ x m , y m , z m , p m , c m , r m ⁇ as described above. represents the position and direction of the antenna.
- parameter 1-1 and parameter 2- 1 may be calculated, for example, as the sum of the estimated throughput for Pa and the estimated throughput for Pb, or the larger of the estimated throughput for Pa and the estimated throughput for Pb. may be the estimated throughput of The same is true for the estimated MCS.
- the estimated throughput (estimated MCS) for each coverage area element is calculated.
- the “parameter” below is a combination of the parameters of the multiple mobile base stations, such as “parameter 1-1 and parameter 2-1".
- the communication quality calculation unit 310 calculates the total value E0 of the estimated throughput (or the estimated MCS) of all the coverage area elements for each parameter, and stores it in the storage unit 350 . Calculating the total value E0 as the index value is an example.
- the communication quality calculation unit 310 sets a throughput (or MCS) target value (quality target value) for each coverage area element in advance, and calculates a quality target value achievement rate (estimated throughput quality /target value or MCS/quality target value) may be calculated.
- the communication quality calculation unit 310 sets a throughput (or MCS) target value (quality target value) in advance for each cover area element. Then, for each parameter, it is possible to determine whether or not the quality target value is achieved for each cover area element, and calculate the number of cover area elements E2 that achieves (estimated throughput (or MCS) ⁇ quality target value).
- Base station controller 340 selects the parameter that maximizes E0 (or E1 or E2).
- the base station control unit 340 transmits the parameters selected in S108 to the relevant mobile base station 100, thereby controlling the mobile base station 100 so that the antenna position and direction are indicated by the parameters.
- the communication quality of each cover area element is calculated and the total for the entire coverage area element is calculated, but this is an example.
- the communication quality of each terminal is calculated in place of each coverage area element, and the same control as above is performed by calculating the total for all terminals. You can do it. In this case, the above "coverage area element" should be replaced with "terminal".
- Control device 300 in the present embodiment can be realized, for example, by causing a computer to execute a program describing the processing details described in the present embodiment.
- this "computer” may be a physical machine or a virtual machine on the cloud.
- the "hardware” described here is virtual hardware.
- the above program can be recorded on a computer-readable recording medium (portable memory, etc.), saved, or distributed. It is also possible to provide the above program through a network such as the Internet or e-mail.
- FIG. 7 is a diagram showing a hardware configuration example of the computer.
- the computer of FIG. 7 has a drive device 1000, an auxiliary storage device 1002, a memory device 1003, a CPU 1004, an interface device 1005, a display device 1006, an input device 1007, an output device 1008, etc., which are connected to each other via a bus B, respectively.
- a program that implements the processing in the computer is provided by a recording medium 1001 such as a CD-ROM or memory card, for example.
- a recording medium 1001 such as a CD-ROM or memory card
- the program is installed from the recording medium 1001 to the auxiliary storage device 1002 via the drive device 1000 .
- the program does not necessarily need to be installed from the recording medium 1001, and may be downloaded from another computer via the network.
- the auxiliary storage device 1002 stores installed programs, as well as necessary files and data.
- the memory device 1003 reads and stores the program from the auxiliary storage device 1002 when a program activation instruction is received.
- the CPU 1004 implements functions related to the control device 300 according to programs stored in the memory device 1003 .
- the interface device 1005 is used as an interface for connecting to the network.
- a display device 1006 displays a GUI (Graphical User Interface) or the like by a program.
- An input device 1007 is composed of a keyboard, a mouse, buttons, a touch panel, or the like, and is used to input various operational instructions.
- the output device 1008 outputs the calculation result.
- the communication quality is maximized using the estimated quality value (estimated MCS or estimated throughput) converted (estimated) from the estimated value of the received power instead of the estimated value of the received power. It is possible to increase the possibility of maximizing the communication quality of the entire area.
- the effect of each index is as follows.
- (Index 1) Calculate and store the total value E0 of the estimated throughput (encoding rate or MCS index corresponding to the estimated MCS) of all coverage area elements (or terminals), and use the parameter that maximizes E0 to the mobile base control the station. This makes it possible to control the communication quality of the entire area to a value close to the maximum with simple calculations. Then, calculate and store the total value E1 of the quality target value achievement rate (estimated throughput (encoding rate corresponding to the estimated MCS or MCS index)/quality target value) for each coverage area element (or terminal), and store E1 control to maximize As a result, the communication quality of the entire area can be controlled to a value closer to maximization while satisfying the desired communication quality.
- index 3 A throughput (or MCS) target value (quality target value) is set in advance for each coverage area element (or terminal), and whether or not the quality target value is achieved is determined for each coverage area element (or terminal). , the number E2 of coverage area elements (or terminals) to be achieved is calculated and stored, and control is performed to maximize E2. As a result, the area area that satisfies the desired communication quality can be controlled to a value close to maximization.
- a control device in a communication system comprising a control device and a mobile base station, an information acquisition unit that acquires shielding object sensing information; a shield map generation unit that generates a shield map based on the shield sensing information; Based on the shielding object map, for each position and direction of the antenna of the mobile base station, the estimated received power at each coverage area element or each terminal is calculated, and based on the estimated received power, each coverage area element or each terminal a communication quality calculation unit that calculates an estimated communication quality in a terminal and calculates an index value for controlling the mobile base station based on the estimated communication quality;
- a control device comprising: a base station control unit that controls the position and direction of the antenna of the mobile base station so that the index value is maximized.
- (Section 2) 2. The control device according to claim 1, wherein the communication quality calculation unit calculates, as the index value, a total value of the estimated communication qualities over all cover area elements or all terminals. (Section 3) The communication quality calculation unit sets a target value of communication quality for each coverage area element or each terminal in advance, and calculates a target value achievement rate for each coverage area element or each terminal from the estimated communication quality and the target value. 2. The control device according to claim 1, wherein the indicator value is a total value of the target value achievement rates over all the coverage area elements or all the terminals.
- the communication quality calculation unit sets a communication quality target value for each coverage area element or each terminal in advance, and determines whether or not the target value is achieved for each coverage area element or each terminal based on the estimated communication quality and the target value.
- a communication system comprising the control device according to any one of items 1 to 4 and the mobile base station.
- a control method executed by a control device in a communication system comprising a control device and a mobile base station, an information acquisition step of acquiring shield sensing information; a shield map generation step of generating a shield map based on the shield sensing information; Based on the shielding object map, for each position and direction of the antenna of the mobile base station, the estimated received power at each coverage area element or each terminal is calculated, and based on the estimated received power, each coverage area element or each terminal a communication quality calculating step of calculating an estimated communication quality in the terminal and calculating an index value for controlling the movable base station based on the estimated communication quality; A control method comprising: a base station control step of controlling the position and direction of the antenna of the movable base station so that the index value is maximized.
- Shield sensor 20 Shield 100 Movable base station 105 Movable unit 110 Operation mechanism unit 120 Radio transmitter/receiver 130 Signal demodulator 200 Terminal 210 Radio transmitter/receiver 2 220 Position information acquisition unit 230 Shielding object sensing 300 Control device 310 Communication quality calculation unit 320 Shielding object map generation unit 330 Information acquisition unit 340 Base station control unit 350 Storage unit 400 Shielding object sensing unit 1000 Drive device 1001 Recording medium 1002 Auxiliary storage device 1003 memory device 1004 CPU 1005 interface device 1006 display device 1007 input device 1008 output device
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Abstract
Description
遮蔽物センシング情報を取得する情報取得部と、
前記遮蔽物センシング情報に基づいて遮蔽物マップを生成する遮蔽物マップ生成部と、
前記遮蔽物マップに基づいて、前記可動基地局のアンテナの位置及び方向毎に、各カバーエリア要素又は各端末における推定受信電力を算出し、当該推定受信電力に基づいて、各カバーエリア要素又は各端末における推定通信品質を算出し、当該推定通信品質に基づいて、前記可動基地局の制御のための指標値を算出する通信品質算出部と、
前記指標値が最大になるように、前記可動基地局のアンテナの位置及び方向を制御する基地局制御部と
を備える制御装置が提供される。
本実施の形態では、主に5G等の通信システム向けに、移動する遮蔽物がある環境であっても、面的な実効通信品質を向上させるための技術について説明する。制御は後述する制御装置300が実行する。制御の概要は下記のとおりである。
本実施の形態では、工場屋内や倉庫内など、準静的又は動的に大きな遮蔽物が移動するような環境で無線通信システムの通信エリアを形成する状況を想定している。通信エリアは、単一又は複数の基地局によりカバーされる。
図3に、本実施の形態における通信システムを構成する各装置の構成を示す。図3は、k台の可動基地局100-1~100-kを備える場合の例である。1~kを特に区別しない場合には「可動基地局100」と記述する。また、複数の端末200が存在する。図3に示す遮蔽物センシング部400は、図1における遮蔽物センサ10に相当する。遮蔽物センシング部400は、制御装置300内に含まれる機能部であってもよい。
図3に示すとおり、可動基地局100は、動作機構部110、無線送受信部120、信号復調部130を有する。動作機構部110は、前述した可動部105を動作させるための機構である。動作機構部110をアクチュエータと呼んでもよい。可動部105が無線送受信部120であってもよい。
端末200は、無線送受信部210、位置情報取得部220、遮蔽物センシング230を備える。無線送受信部210は、無線信号の送受信を行う。位置情報取得部220は、端末200自身の位置情報を取得する。遮蔽物センシング部230は遮蔽物の探知を行う。遮蔽物センシング部230は、カメラでもよいし、LiDARでもよいし、その他のセンサであってもよい。
制御装置300は、通信品質算出部310、遮蔽物マップ生成部320、情報取得部330、基地局制御部340、記憶部350を備える。各部の概要は下記のとおりである。
次に、図4に示すフローチャートを参照して、通信システム(特に制御装置300)の動作例を説明する。説明において図5、図6を適宜参照する。
S101において、情報取得部330は、実機測定(又はコンピュータシミュレーション又は装置スペックを参照すること)により、電波強度(RSSI又はRSRP)と通信品質(スループット又はMCS)との関係を取得して、記憶部350に格納する。
S102において、情報取得部330は、遮蔽物センシング部400により得られた遮蔽物センシング情報(カメラ映像情報、LiDAR情報等)を取得し、記憶部350に格納する。
S103において、遮蔽物マップ生成部320は、S102において取得した遮蔽物センシング情報(カメラ映像情報、LiDAR情報等)に基づいて、リアルタイムに遮蔽物を探知して3Dマップ(又は2Dマップ)を生成する。3Dマップには、遮蔽物の3次元の位置情報が含まれる。2Dマップには遮蔽物の2次元の位置情報が含まれる。
S104において、通信品質算出部310は、レイトレースシミュレーション等により、各可動基地局について、アンテナ位置・方向パラメータ毎のカバーエリア要素への伝搬損失Lを求める。
通信品質算出部310は、可動基地局100毎、パラメータ毎、カバーエリア要素毎に、送信出力P‐伝搬損失Lにより推定受信電力(RSSI、RSRP等)を算出する。
通信品質算出部310は、パラメータ毎、カバーエリア要素毎に、S101で取得した電波強度(受信電力)と通信品質との対応関係に基づいて、S105で算出した推定受信電力を、推定スループット(又は推定MCS)に変換する。
S107において、通信品質算出部310は、パラメータ毎に、全カバーエリア要素の推定スループット(又は推定MCS)の合計値E0を算出し、記憶部350に記憶する。指標値として合計値E0を算出することは一例である。
また、通信品質算出部310は、予めカバーエリア要素毎にスループット(又はMCS)の目標値(品質目標値)を設定しておき、パラメータ毎に、カバーエリア要素毎の品質目標値達成有無を判定して達成(推定スループット(又はMCS)≧品質目標値)となるカバーエリア要素の数E2を算出してもよい。
基地局制御部340は、E0(又はE1又はE2)を最大にするパラメータを選択する。
基地局制御部340は、S108において選択したパラメータを該当の可動基地局100に送信することにより、当該パラメータにより示されるアンテナ位置・方向になるように可動基地局100を制御する。
本実施の形態における制御装置300は、例えば、コンピュータに、本実施の形態で説明する処理内容を記述したプログラムを実行させることにより実現可能である。なお、この「コンピュータ」は、物理マシンであってもよいし、クラウド上の仮想マシンであってもよい。仮想マシンを使用する場合、ここで説明する「ハードウェア」は仮想的なハードウェアである。
本実施の形態に係る技術により、受信電力の推定値ではなく、そこから換算(推定)した品質推定値(推定MCS又は推定スループット)を用いて通信品質の最大化制御を行うこととしたので、エリア全体の通信品質を最大化できる可能性を高めることができる。指標毎の効果は下記のとおりである。
(指標2)予めカバーエリア要素(又は端末)毎にスループット(又はMCS)の目標値(品質目標値)を設定しておき、カバーエリア要素(又は端末)毎の品質目標値達成率(推定スループット(推定MCSに対応する符号化率又はMCS index)/品質目標値)の合計値E1を算出して記憶し、E1を最大化する制御を行う。これにより、エリア全体の通信品質を、所望の通信品質を満たしつつ最大化により近い値に制御できる。
本明細書には、少なくとも下記各項の制御装置、通信システム、制御方法、及びプログラムが開示されている。
(第1項)
制御装置と可動基地局とを備える通信システムにおける前記制御装置であって、
遮蔽物センシング情報を取得する情報取得部と、
前記遮蔽物センシング情報に基づいて遮蔽物マップを生成する遮蔽物マップ生成部と、
前記遮蔽物マップに基づいて、前記可動基地局のアンテナの位置及び方向毎に、各カバーエリア要素又は各端末における推定受信電力を算出し、当該推定受信電力に基づいて、各カバーエリア要素又は各端末における推定通信品質を算出し、当該推定通信品質に基づいて、前記可動基地局の制御のための指標値を算出する通信品質算出部と、
前記指標値が最大になるように、前記可動基地局のアンテナの位置及び方向を制御する基地局制御部と
を備える制御装置。
(第2項)
前記通信品質算出部は、前記指標値として、全カバーエリア要素又は全端末にわたる前記推定通信品質の合計値を算出する
第1項に記載の制御装置。
(第3項)
前記通信品質算出部は、予めカバーエリア要素毎又は端末毎の通信品質の目標値を設定しておき、前記推定通信品質と前記目標値から各カバーエリア要素又は各端末における目標値達成率を算出し、前記指標値として、全カバーエリア要素又は全端末にわたる前記目標値達成率の合計値を算出する
第1項に記載の制御装置。
(第4項)
前記通信品質算出部は、予めカバーエリア要素毎又は端末毎の通信品質の目標値を設定しておき、前記推定通信品質と前記目標値から各カバーエリア要素又は各端末における目標値達成有無を判定し、前記指標値として、目標値を達成したカバーエリア要素の数又は端末の数を算出する
第1項に記載の制御装置。
(第5項)
第1項ないし第4項のうちいずれか1項に記載の前記制御装置と前記可動基地局とを備える通信システム。
(第6項)
制御装置と可動基地局とを備える通信システムにおける前記制御装置が実行する制御方法であって、
遮蔽物センシング情報を取得する情報取得ステップと、
前記遮蔽物センシング情報に基づいて遮蔽物マップを生成する遮蔽物マップ生成ステップと、
前記遮蔽物マップに基づいて、前記可動基地局のアンテナの位置及び方向毎に、各カバーエリア要素又は各端末における推定受信電力を算出し、当該推定受信電力に基づいて、各カバーエリア要素又は各端末における推定通信品質を算出し、当該推定通信品質に基づいて、前記可動基地局の制御のための指標値を算出する通信品質算出ステップと、
前記指標値が最大になるように、前記可動基地局のアンテナの位置及び方向を制御する基地局制御ステップと
を備える制御方法。
(第7項)
コンピュータを、第1項ないし第4項のうちいずれか1項に記載の前記制御装置における各部として機能させるためのプログラム。
20 遮蔽物
100 可動基地局
105 可動部
110 動作機構部
120 無線送受信部
130 信号復調部
200 端末
210 無線送受信部2
220 位置情報取得部
230 遮蔽物センシング
300 制御装置
310 通信品質算出部
320 遮蔽物マップ生成部
330 情報取得部
340 基地局制御部
350 記憶部
400 遮蔽物センシング部
1000 ドライブ装置
1001 記録媒体
1002 補助記憶装置
1003 メモリ装置
1004 CPU
1005 インタフェース装置
1006 表示装置
1007 入力装置
1008 出力装置
Claims (7)
- 制御装置と可動基地局とを備える通信システムにおける前記制御装置であって、
遮蔽物センシング情報を取得する情報取得部と、
前記遮蔽物センシング情報に基づいて遮蔽物マップを生成する遮蔽物マップ生成部と、
前記遮蔽物マップに基づいて、前記可動基地局のアンテナの位置及び方向毎に、各カバーエリア要素又は各端末における推定受信電力を算出し、当該推定受信電力に基づいて、各カバーエリア要素又は各端末における推定通信品質を算出し、当該推定通信品質に基づいて、前記可動基地局の制御のための指標値を算出する通信品質算出部と、
前記指標値が最大になるように、前記可動基地局のアンテナの位置及び方向を制御する基地局制御部と
を備える制御装置。 - 前記通信品質算出部は、前記指標値として、全カバーエリア要素又は全端末にわたる前記推定通信品質の合計値を算出する
請求項1に記載の制御装置。 - 前記通信品質算出部は、予めカバーエリア要素毎又は端末毎の通信品質の目標値を設定しておき、前記推定通信品質と前記目標値から各カバーエリア要素又は各端末における目標値達成率を算出し、前記指標値として、全カバーエリア要素又は全端末にわたる前記目標値達成率の合計値を算出する
請求項1に記載の制御装置。 - 前記通信品質算出部は、予めカバーエリア要素毎又は端末毎の通信品質の目標値を設定しておき、前記推定通信品質と前記目標値から各カバーエリア要素又は各端末における目標値達成有無を判定し、前記指標値として、目標値を達成したカバーエリア要素の数又は端末の数を算出する
請求項1に記載の制御装置。 - 請求項1ないし4のうちいずれか1項に記載の前記制御装置と前記可動基地局とを備える通信システム。
- 制御装置と可動基地局とを備える通信システムにおける前記制御装置が実行する制御方法であって、
遮蔽物センシング情報を取得する情報取得ステップと、
前記遮蔽物センシング情報に基づいて遮蔽物マップを生成する遮蔽物マップ生成ステップと、
前記遮蔽物マップに基づいて、前記可動基地局のアンテナの位置及び方向毎に、各カバーエリア要素又は各端末における推定受信電力を算出し、当該推定受信電力に基づいて、各カバーエリア要素又は各端末における推定通信品質を算出し、当該推定通信品質に基づいて、前記可動基地局の制御のための指標値を算出する通信品質算出ステップと、
前記指標値が最大になるように、前記可動基地局のアンテナの位置及び方向を制御する基地局制御ステップと
を備える制御方法。 - コンピュータを、請求項1ないし4のうちいずれか1項に記載の前記制御装置における各部として機能させるためのプログラム。
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JP2007525040A (ja) * | 2003-01-22 | 2007-08-30 | ワイアレス バレー コミュニケーションズ インコーポレイテッド | 所望のネットワークの性能目標を得るために機器を自動的に配置または構成するシステムおよび方法、ならびにセキュリティ、rfタグ、および帯域幅プロビジョニングのためのシステムおよび方法 |
JP2010187140A (ja) * | 2009-02-10 | 2010-08-26 | Softbank Bb Corp | 通信特性解析システム、通信特性解析方法、及び通信特性解析プログラム |
WO2017018070A1 (ja) * | 2015-07-28 | 2017-02-02 | シャープ株式会社 | 無線通信装置およびその設置方法 |
US20180351605A1 (en) * | 2016-01-27 | 2018-12-06 | RF DSP Inc. | Cellular wireless communication systems enhanced by intelligent self-organizing wireless distributed active antennas |
KR20210030769A (ko) * | 2019-09-10 | 2021-03-18 | 주식회사 케이티 | 안테나에 대한 최적화 파라미터를 도출하는 방법, 장치 및 컴퓨터 프로그램 |
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JP2007525040A (ja) * | 2003-01-22 | 2007-08-30 | ワイアレス バレー コミュニケーションズ インコーポレイテッド | 所望のネットワークの性能目標を得るために機器を自動的に配置または構成するシステムおよび方法、ならびにセキュリティ、rfタグ、および帯域幅プロビジョニングのためのシステムおよび方法 |
JP2010187140A (ja) * | 2009-02-10 | 2010-08-26 | Softbank Bb Corp | 通信特性解析システム、通信特性解析方法、及び通信特性解析プログラム |
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KR20210030769A (ko) * | 2019-09-10 | 2021-03-18 | 주식회사 케이티 | 안테나에 대한 최적화 파라미터를 도출하는 방법, 장치 및 컴퓨터 프로그램 |
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