WO2022244081A1 - 無線パラメータ制御方法、制御装置、無線パラメータ制御システム、及びプログラム - Google Patents
無線パラメータ制御方法、制御装置、無線パラメータ制御システム、及びプログラム Download PDFInfo
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- WO2022244081A1 WO2022244081A1 PCT/JP2021/018674 JP2021018674W WO2022244081A1 WO 2022244081 A1 WO2022244081 A1 WO 2022244081A1 JP 2021018674 W JP2021018674 W JP 2021018674W WO 2022244081 A1 WO2022244081 A1 WO 2022244081A1
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000004891 communication Methods 0.000 claims abstract description 88
- 238000004364 calculation method Methods 0.000 claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000011156 evaluation Methods 0.000 description 8
- 238000013500 data storage Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 7
- 230000006866 deterioration Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012552 review Methods 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0268—Traffic management, e.g. flow control or congestion control using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/04—Interfaces between hierarchically different network devices
- H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to technology for performing radio parameter control for base stations in a radio network comprising a plurality of base stations.
- wireless communication parts such as installation and parameter setting of wireless base stations (hereafter referred to as base stations), network parts such as between base stations, access networks, and core networks, and user authentication and Although various elements such as upper service parts such as portal screens are included, the present invention focuses on radio parameter settings of the base station.
- a wireless network multiple base stations are installed in overlapping areas (also called cells) in order to cover the entire area. Therefore, if the base stations use the same frequency channel, inter-cell interference occurs and communication quality deteriorates.
- Non-Patent Document 1 discloses a technique for designing frequency channels and bandwidths of base stations for improving user throughput through iterative optimization.
- the user's location, communication status, and surrounding environment change from moment to moment, and the communication status of the wireless network changes with each change. If the wireless parameters are constantly changed according to the communication situation, the frequency of calculating the wireless parameters will increase, causing frequent interruptions due to parameter changes and an increase in optimization calculation resources. In the prior art, it was difficult to appropriately determine whether to review the design of the wireless network and perform wireless parameter control.
- inter-cell interference is one of the issues that cause quality deterioration in wireless networks, and it is necessary to perform radio parameter control to reduce inter-cell interference from the surroundings of cells whose communication quality has deteriorated.
- radio parameter control it has been difficult with conventional techniques to perform such wireless parameter control.
- the conventional technology has the problem that it is difficult to appropriately control the wireless parameters for the base stations that make up the wireless network.
- the present invention has been made in view of the above points, and aims to provide a technique for appropriately controlling wireless parameters for base stations that constitute a wireless network.
- a radio parameter control method performed by a control device for a plurality of base stations constituting a radio network, comprising: an information collecting step of collecting radio environment information in the radio network and communication quality information for each communication area provided by each of the plurality of base stations; a determination step of determining whether or not to implement radio parameter control based on the communication quality information; a radio parameter calculating step of calculating radio parameters for at least one of the plurality of base stations based on the radio environment information when the determining step determines that radio parameter control is to be performed; A control step of setting the radio parameters calculated by the radio parameter calculation step to the at least one base station.
- a technology for appropriately controlling wireless parameters for base stations that configure a wireless network.
- FIG. 1 is an overall configuration diagram of a wireless network according to an embodiment of the present invention
- FIG. 3 is a functional configuration diagram of a control device 300
- FIG. It is a hardware block diagram of an apparatus.
- 4 is a flowchart for explaining the operation of the control device 300
- 1 illustrates an example of a wireless network
- FIG. 4 is a diagram for explaining an example of radio signal power information
- FIG. 4 is a diagram for explaining an example of radio signal power information
- FIG. 4 is a diagram for explaining an example of radio signal power information
- FIG. 4 is a diagram for explaining an example of radio signal power information
- FIG. 4 is a diagram for explaining an example of radio signal power information
- FIG. 4 is a diagram for explaining an example of radio signal power information
- the base station in the present embodiment is, for example, the wireless LAN base station (access point) described in Non-Patent Document 1, but is not limited to this.
- the base station in this embodiment may be a base station in radio access technologies such as 6G, 5G, LTE, and 3G.
- the present invention can be applied to a multi-radio system in which base stations of different radio access technologies coexist.
- FIG. 1 shows an overall configuration example of a wireless network (which may be called a wireless parameter control system) according to this embodiment.
- a wireless network which may be called a wireless parameter control system
- FIG. 1 shows an overall configuration example of a wireless network (which may be called a wireless parameter control system) according to this embodiment.
- a plurality of base stations 1-1 to 1-n are provided, and each base station is connected to a network 200 wirelessly or by wire.
- Each base station constitutes a communication area, and zero or more terminals (not shown) exist within the communication area.
- the base station itself is an existing base station, and in addition to wirelessly communicating with terminals, it is possible to communicate with other base stations, application servers, etc. via the network 200 .
- the network 200 is, for example, a LAN, the Internet, a core network of a mobile network, or the like.
- a control device 300 is also connected to the network 200 .
- the control device 300 is a device having the functions according to the present invention, and calculates radio parameters of each base station by a method to be described later, and controls radio parameter settings and the like for the base stations.
- FIG. 2 shows an example of the functional configuration of the control device 300.
- the control device 300 has an information collection section 310 , a calculation section 320 , a control section 330 and a data storage section 340 .
- the information collection unit 310 collects communication quality information of the communication area of each base station, radio environment information of each base station, and the like.
- the determination unit 320 determines whether or not to execute radio parameter control for at least one base station.
- the wireless parameter calculation unit 330 calculates wireless parameters when the determination unit 320 determines to execute wireless parameter control.
- the control unit 330 sets the wireless parameters calculated by the wireless parameter calculation unit 330 to the corresponding base station.
- the data storage unit 350 stores information collected by the information collection unit 310, information necessary for calculation by the determination unit 320 and the wireless parameter calculation unit 330, calculation results, and the like.
- the control device 300 may be composed of one device (computer) or may be composed of a plurality of computers.
- the determination unit 320 and other functional units may be configured by separate computers.
- the control device 300 can be implemented, for example, by causing a computer to execute a program.
- This computer may be a physical computer or a virtual machine on the cloud.
- control device 300 can be realized by executing a program corresponding to the processing performed by the control device 300 using hardware resources such as a CPU and memory built into the computer.
- the above program can be recorded in 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. 3 is a diagram showing a hardware configuration example of the computer.
- the computer of FIG. 3 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.
- 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 have to be installed from the computer-readable recording medium 1001, and may be downloaded from another computer via a 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 a network and functions as a transmitter and a receiver.
- 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.
- a computer-readable recording medium is a medium that dynamically retains a program for a short period of time, such as a communication line for transmitting a program via a network such as the Internet or a communication line such as a telephone line. , such as a volatile memory inside the computer system, which holds the program for a certain period of time.
- the program may be for realizing part of the functions of the control device 300, or may be a program capable of realizing the functions described above in combination with a program already recorded in the computer. Also, some or all of the functions of the control device 300 may be implemented using hardware such as a PLD (Programmable Logic Device) or an FPGA (Field Programmable Gate Array).
- PLD Programmable Logic Device
- FPGA Field Programmable Gate Array
- the data storage unit 350 of the control device 300 stores location information of each base station, specification information of each base station (radio system, transmission power, model, capacity, etc.) as base station information. shall be stored.
- the determination unit 320 and the radio parameter control unit 330 which will be described later, can appropriately use the base station information to calculate radio parameters, calculate communication quality information after radio parameter control, and the like.
- the information collection unit 310 collects communication quality information for each communication area and radio environment information in each base station from each base station, and stores the collected information in the data storage unit 350.
- the communication quality information is, for example, throughput, delay amount, etc. for each communication area (for each base station).
- the radio environment information is, for example, information on the frequency channel used in each base station, information on the bandwidth used in each base station, interference information in each base station, and the like.
- the interference information is, for example, information on received power of radio signals received from other base stations.
- the determination unit 320 determines (determines) whether or not to implement radio parameter control for at least one base station based on the information collected in S1. If the determination result in S2 is Yes (perform wireless parameter control), the process proceeds to S4.
- the determination method in S2 is not limited to a specific method, but for example, one of the following examples 1 to 3 can be used. Any one or more of Examples 1 to 3 may be combined and applied.
- Example 1 the determination unit 320 determines whether or not to perform wireless parameter control based on the current communication quality information. For example, when the communication quality (eg, throughput) of at least one communication area (base station) is worse than a threshold, the determination unit 320 determines that radio parameter control is to be performed, and proceeds to S4. "Worse than the threshold" means, for example, if the communication quality is the throughput, "communication quality ⁇ threshold", and if the communication quality is the amount of delay, "communication quality >threshold". be.
- the determination unit 320 determines to perform the wireless parameter control when, for example, the determination result that "the communication quality of at least one communication area is worse than the threshold value" is obtained N times consecutively. and may proceed to S4. where N is an integer greater than one.
- Example 2 In example 2, the determination unit 320 determines communication quality information (communication quality assumption information and called) is calculated, the communication quality estimation information is compared with the communication quality information acquired in S1, and if the evaluation value obtained by the comparison is equal to or greater than a predetermined threshold value, it is determined that the wireless parameter control is to be performed. and proceed to S4.
- communication quality information communication quality assumption information and called
- the determination result in S2 for example, "the evaluation value is equal to or greater than the threshold value"
- proceed to S3 collect information in S1 again, and proceed to S2. The determination may be repeated.
- the determination unit 320 determines to perform the wireless parameter control, and proceeds to S4.
- N is an integer greater than one.
- the wireless parameter control is to be performed when the determination result that "the evaluation value is equal to or greater than the threshold value" is obtained N times or more out of P repetitions, and the process proceeds to S4.
- P is an integer that satisfies P>N.
- radio parameter control for obtaining communication quality assumption information is not actually performing radio parameter control for base stations, but based on current radio environment information (interference information, etc.), each base station is calculated, and assuming that the calculated radio parameters are set in each base station, information on the assumed communication quality after the setting is obtained.
- Example 2 As a method of calculating the wireless parameters in Example 2, for example, the method disclosed in Non-Patent Document 1 (RATOP algorithm) may be used. Also, as the method of calculating the wireless parameter in Example 2, the method described in S4, which will be described later, may be used. Also, as the wireless parameter calculation method in Example 2, methods other than these may be used.
- RATOP algorithm Non-Patent Document 1
- the current communication quality information (e.g., average throughput) of all of the plurality of base stations to be controlled is used as communication quality information, and after virtual radio parameter control, the control target and
- the communication quality information (e.g, average throughput) of all the base stations to be used is set as the communication quality virtual information
- the evaluation value may be "communication quality virtual information - communication quality information”.
- virtual communication quality information of a base station with the worst communication quality among a plurality of base stations after virtual radio parameter control may be used as the evaluation value.
- the evaluation value is not limited to the above, and any value may be used as long as it can evaluate the degree of improvement of the communication quality virtual information with respect to the communication quality information.
- Example 3 In example 3, the determination unit 320 repeats the waiting for a certain period of time in S3 and the information collection in S1, and if the variation in the communication quality information within a predetermined time is equal to or greater than a predetermined threshold, the wireless parameter control is performed. , and proceeds to S4.
- the threshold is Th
- the best value of the communication quality information within a certain time is QB
- the worst value is QW. It is determined that parameter control is to be performed, and the process proceeds to S4.
- variable is an example of the difference between the best value and the worst value. For example, if a certain reference value of the communication quality information is determined, and the number of times the absolute value of the deviation from the reference value is equal to or greater than the threshold is equal to or greater than a predetermined number of times within the time period, wireless parameter control is performed. It may be determined and proceed to S4.
- Non-Patent Document 1 can be used to calculate the radio parameters of each base station.
- the radio parameters for each base station may be calculated by adjusting radio signal power information between base stations on a computer (that is, control device 300).
- the radio signal power information between base stations is information indicating the reception power of radio signals received from other base stations in each base station, and is information included in the radio environment information collected in S1.
- a method for calculating radio parameters by adjusting radio signal power information between base stations will be described in detail.
- FIG. 5 is a diagram showing a configuration example of a wireless network assumed in explaining the wireless parameter calculation method.
- this wireless network there are base stations 1-1 to 1-4 as base stations to be controlled by the control device 300, and areas 100-1-1 to 100-1 as their communication areas. 1-4 exist. Each base station is connected to network 200 .
- 6 and 7 show examples of radio signal power information in the configuration example shown in FIG. 6 and 7 show the same information in different formats. 6 and 7, for example, the base station 1-4 receives radio signals with strengths of -85 dBm, -75 dBm, and -75 dBm from the base station 1-1, the base station 1-2, and the base station 1-3, respectively. shown to be receiving.
- the wireless parameter calculation unit 330 reads the wireless signal power information from the data storage unit 350 .
- the wireless parameter calculation unit 330 determines that the base station 1-1 is the transmission source.
- the radio signal power information is adjusted so that the radio signal power information becomes higher. This adjustment does not actually adjust the base station 1-1, but adjusts the information on the computer.
- radio signal power information after adjustment examples are shown in FIGS. As shown in FIGS. 8 and 9, in this example, the power information is adjusted so that the base station 1-2, the base station 1-3, and the base station 1-4 on the receiving side each increase by 10 dBm.
- the wireless parameter calculator 330 calculates wireless parameters (eg, frequency channel used by the base station) based on this adjusted power information.
- wireless parameters eg, frequency channel used by the base station
- the technique disclosed in Non-Patent Document 1 may be used, or the technique other than the technique disclosed in Non-Patent Document 1 may be used.
- Existing technology may be used. In any technique, it is assumed that radio parameters are adjusted to reduce interference for a base station that has increased interference from neighboring base stations as a result of power information adjustment.
- interference from the base station 1-1 which was not an interference target until now, can be detected more strongly by the base station 1-4. Even if the same frequency channel as station 1-1 is used, it is considered that another frequency channel will be used by radio parameter control after adjustment.
- the power information is adjusted to increase the power information on the receiving side whose source is the base station where deterioration in communication quality is detected, but this is just an example.
- the base stations 1-2 and 1-3 adjacent to the base station 1-1 in which deterioration in communication quality has been detected may be adjusted to reduce the power information on the receiving side that is the transmission source.
- the signals from the base stations 1-2 and 1-3, which were interfering before adjustment, are no longer interfering, resulting in deterioration of communication quality. is detected, the frequency channel of the base station 1-1 may be changed.
- control unit 340 sets the radio parameters calculated in S4 to at least one corresponding base station.
- the technology according to the present embodiment makes it possible to appropriately control radio parameters for base stations that configure a radio network. More specifically, it is possible to easily make a decision to review the design of the wireless network, and to perform efficient control. In addition, it is possible to set radio parameters so as to reduce inter-cell interference from the surroundings of a cell whose communication quality has deteriorated by simple processing.
- a radio parameter control method performed by a control device for a plurality of base stations constituting a radio network, an information collecting step of collecting radio environment information in the radio network and communication quality information for each communication area provided by each of the plurality of base stations; a determination step of determining whether or not to implement radio parameter control based on the communication quality information; a radio parameter calculating step of calculating radio parameters for at least one of the plurality of base stations based on the radio environment information when the determining step determines that radio parameter control is to be performed;
- a radio parameter control method comprising: a control step of setting the radio parameters calculated by the radio parameter calculation step in the at least one base station.
- (Section 2) In the determination step, the control device calculating estimated communication quality information assumed when radio parameter control is performed on at least one base station among the plurality of base stations, and calculating the estimated communication quality information and the actually collected communication quality information; 2.
- (Section 3) In the determination step, the control device 3.
- the radio parameter control method according to claim 1 or 2 further comprising determining to perform radio parameter control when a variation in the communication quality information within a predetermined time reaches or exceeds a threshold.
- the control device Adjusting radio signal power information between base stations in the radio environment information, and calculating a radio parameter for at least one base station based on the radio signal power information after adjustment.
- the radio parameter control method according to any one of claims 1 to 3.
- the control device 5 In the wireless parameter calculation step, the control device 5.
- (Section 6) A control device for performing radio parameter control for a plurality of base stations constituting a radio network, an information collecting unit that collects radio environment information in the radio network and communication quality information for each communication area provided by each of the plurality of base stations; a determination unit that determines whether or not to perform radio parameter control based on the communication quality information; a radio parameter calculator that calculates radio parameters for at least one of the plurality of base stations based on the radio environment information when the decision unit decides to perform radio parameter control; and a control unit that sets the radio parameters calculated by the radio parameter calculation unit in the at least one base station.
- (Section 7) A radio parameter control system comprising the control device according to claim 6 and the plurality of base stations.
- (Section 8) A program for causing a computer to function as each unit in the control device according to item 6.
- Base station 100 Area 200 Network 300 Control device 310 Information collection unit 320 Judgment unit 330 Wireless parameter calculation unit 340 Control unit 350 Data storage 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
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Abstract
Description
前記無線ネットワークにおける無線環境情報と、前記複数の基地局がそれぞれ提供する通信エリア毎の通信品質情報を収集する情報収集ステップと、
前記通信品質情報に基づいて、無線パラメータ制御を実施するか否かを判定する判定ステップと、
前記判定ステップにより、無線パラメータ制御を実施すると判定された場合に、前記無線環境情報に基づいて、前記複数の基地局のうちの少なくとも1つの基地局に対する無線パラメータを算出する無線パラメータ算出ステップと、
前記無線パラメータ算出ステップにより算出された無線パラメータを、前記少なくとも1つの基地局に設定する制御ステップと
を備える無線パラメータ制御方法が提供される。
図1に、本実施の形態における無線ネットワーク(無線パラメータ制御システムと呼んでもよい)の全体構成例を示す。図1に示すように、複数の基地局1-1~1-nが備えられ、各基地局はネットワーク200に無線又は有線で接続されている。各基地局は通信エリアを構成し、通信エリア内には、図示しない0台以上の端末が存在する。
図2に、制御装置300の機能構成例を示す。図2に示すように、制御装置300は、情報収集部310、演算部320、制御部330、データ格納部340を有する。
制御装置300は、例えば、コンピュータにプログラムを実行させることにより実現できる。このコンピュータは、物理的なコンピュータであってもよいし、クラウド上の仮想マシンであってもよい。
以下、図4に示すフローチャートの手順に沿って、本実施の形態における制御装置300の動作例を説明する。以下の動作の前提として、制御装置300のデータ格納部350には、基地局情報として、各基地局の位置情報、各基地局の仕様情報(無線方式、送信電力、機種、容量等)等が格納されているものとする。後述する判定部320や無線パラメータ制御部330は、当該基地局情報を適宜利用して無線パラメータの算出や、無線パラメータ制御後の通信品質情報の算出等を行うことができる。
S1(ステップ1)において、情報収集部310が、各基地局から、通信エリア毎の通信品質情報、及び、各基地局における無線環境情報を収集し、収集した情報をデータ格納部350に格納する。通信品質情報は、例えば、通信エリア毎(基地局毎)のスループット、遅延量等である。無線環境情報は、例えば、各基地局において使用している周波数チャネルの情報、各基地局において使用している帯域幅の情報、各基地局における干渉情報等である。干渉情報は、例えば、他の基地局から受信する無線信号の受信電力の情報である。
S2において、判定部320が、S1で収集した情報に基づいて、少なくとも1つの基地局に対する無線パラメータ制御を実施するか否かを決定(判定)する。S2での判定結果がYes(無線パラメータ制御を実施する)であればS4に進む。
例1において、判定部320は、現在の通信品質情報に基づいて、無線パラメータ制御を実施するか否かを判定する。例えば、判定部320は、少なくとも1つの通信エリア(基地局)の通信品質(例:スループット)が、閾値よりも悪い場合に、無線パラメータ制御を実施すると判断してS4に進む。「閾値よりも悪い」とは、例えば、通信品質がスループットであれば、「通信品質<閾値」となることであり、通信品質が遅延量であれば、「通信品質>閾値」となることである。
例2において、判定部320は、無線環境情報、通信品質情報等に基づいて、無線パラメータ制御を、少なくとも1つの基地局に対して適用した場合に想定される通信品質情報(通信品質想定情報と呼ぶ)を算出し、当該通信品質想定情報とS1で取得した通信品質情報との比較を行い、その比較により得られる評価値が予め定めた閾値以上になる場合に、無線パラメータ制御を実施すると判定し、S4に進む。
例3において、判定部320は、S3の一定期間待機と、S1の情報収集を繰り返し、予め定めた時間内における通信品質情報の変動が、予め定めた閾値以上となった場合に、無線パラメータ制御を実施すると判定し、S4に進む。
次に、S4について説明する。S4では、例えば、非特許文献1に開示された方法を用いて各基地局の無線パラメータを算出することができる。また、計算機(つまり、制御装置300)上で、基地局間の無線信号電力情報に対する調整を行うことにより、各基地局に対する無線パラメータを算出することとしてもよい。基地局間の無線信号電力情報は、各基地局において、他の基地局から受信する無線信号の受信電力を示す情報であり、S1で収集した無線環境情報に含まれる情報である。以下、基地局間の無線信号電力情報に対する調整を行うことにより無線パラメータを算出する方法を詳細に説明する。
S5において、制御部340は、S4において算出された無線パラメータを、少なくとも1つの該当基地局に設定する。
本実施の形態に係る技術により、無線ネットワークを構成する基地局に対する無線パラメータの制御を適切に行うことが可能となる。より具体的には、無線ネットワークの設計見直しの判断を容易に行うことができ、効率的な制御が行える。また、簡易な処理により通信品質が低下したセルに対する周囲からのセル間干渉を低減するような無線パラメータ設定を行うことが可能となる。
本明細書には、少なくとも下記各項に記載の無線パラメータ制御方法、制御装置、無線パラメータ制御システム、及びプログラムが開示されている。
(第1項)
無線ネットワークを構成する複数の基地局に対して制御装置が行う無線パラメータ制御方法であって、
前記無線ネットワークにおける無線環境情報と、前記複数の基地局がそれぞれ提供する通信エリア毎の通信品質情報を収集する情報収集ステップと、
前記通信品質情報に基づいて、無線パラメータ制御を実施するか否かを判定する判定ステップと、
前記判定ステップにより、無線パラメータ制御を実施すると判定された場合に、前記無線環境情報に基づいて、前記複数の基地局のうちの少なくとも1つの基地局に対する無線パラメータを算出する無線パラメータ算出ステップと、
前記無線パラメータ算出ステップにより算出された無線パラメータを、前記少なくとも1つの基地局に設定する制御ステップと
を備える無線パラメータ制御方法。
(第2項)
前記判定ステップにおいて、前記制御装置は、
前記複数の基地局のうちの少なくとも1つの基地局に対して無線パラメータ制御を実施した場合に想定される通信品質想定情報を算出し、当該通信品質想定情報と、実際に収集された通信品質情報とを比較することにより、無線パラメータ制御を実施するか否かを判定する
第1項に記載の無線パラメータ制御方法。
(第3項)
前記判定ステップにおいて、前記制御装置は、
予め定めた時間内における通信品質情報の変動が、閾値以上となった場合に、無線パラメータ制御を実施すると判定する
第1項又は第2項に記載の無線パラメータ制御方法。
(第4項)
前記無線パラメータ算出ステップにおいて、前記制御装置は、
前記無線環境情報における基地局間の無線信号電力情報に対する調整を行い、調整後の無線信号電力情報に基づいて、少なくとも1つの基地局に対する無線パラメータの算出を行う
第1項ないし第3項のうちいずれか1項に記載の無線パラメータ制御方法。
(第5項)
前記無線パラメータ算出ステップにおいて、前記制御装置は、
前記通信品質情報に基づいて、通信品質が低下した基地局が送信元となる受信側の無線信号電力情報に対する調整を行う
第4項に記載の無線パラメータ制御方法。
(第6項)
無線ネットワークを構成する複数の基地局に対する無線パラメータ制御を行うための制御装置であって、
前記無線ネットワークにおける無線環境情報と、前記複数の基地局がそれぞれ提供する通信エリア毎の通信品質情報を収集する情報収集部と、
前記通信品質情報に基づいて、無線パラメータ制御を実施するか否かを判定する判定部と、
前記判定部により、無線パラメータ制御を実施すると判定された場合に、前記無線環境情報に基づいて、前記複数の基地局のうちの少なくとも1つの基地局に対する無線パラメータを算出する無線パラメータ算出部と、
前記無線パラメータ算出部により算出された無線パラメータを、前記少なくとも1つの基地局に設定する制御部と
を備える制御装置。
(第7項)
第6項に記載の前記制御装置と、前記複数の基地局とを備える無線パラメータ制御システム。
(第8項)
コンピュータを、第6項に記載の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。
100 エリア
200 ネットワーク
300 制御装置
310 情報収集部
320 判定部
330 無線パラメータ算出部
340 制御部
350 データ格納部
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
Claims (8)
- 無線ネットワークを構成する複数の基地局に対して制御装置が行う無線パラメータ制御方法であって、
前記無線ネットワークにおける無線環境情報と、前記複数の基地局がそれぞれ提供する通信エリア毎の通信品質情報を収集する情報収集ステップと、
前記通信品質情報に基づいて、無線パラメータ制御を実施するか否かを判定する判定ステップと、
前記判定ステップにより、無線パラメータ制御を実施すると判定された場合に、前記無線環境情報に基づいて、前記複数の基地局のうちの少なくとも1つの基地局に対する無線パラメータを算出する無線パラメータ算出ステップと、
前記無線パラメータ算出ステップにより算出された無線パラメータを、前記少なくとも1つの基地局に設定する制御ステップと
を備える無線パラメータ制御方法。 - 前記判定ステップにおいて、前記制御装置は、
前記複数の基地局のうちの少なくとも1つの基地局に対して無線パラメータ制御を実施した場合に想定される通信品質想定情報を算出し、当該通信品質想定情報と、実際に収集された通信品質情報とを比較することにより、無線パラメータ制御を実施するか否かを判定する
請求項1に記載の無線パラメータ制御方法。 - 前記判定ステップにおいて、前記制御装置は、
予め定めた時間内における通信品質情報の変動が、閾値以上となった場合に、無線パラメータ制御を実施すると判定する
請求項1又は2に記載の無線パラメータ制御方法。 - 前記無線パラメータ算出ステップにおいて、前記制御装置は、
前記無線環境情報における基地局間の無線信号電力情報に対する調整を行い、調整後の無線信号電力情報に基づいて、少なくとも1つの基地局に対する無線パラメータの算出を行う
請求項1ないし3のうちいずれか1項に記載の無線パラメータ制御方法。 - 前記無線パラメータ算出ステップにおいて、前記制御装置は、
前記通信品質情報に基づいて、通信品質が低下した基地局が送信元となる受信側の無線信号電力情報に対する調整を行う
請求項4に記載の無線パラメータ制御方法。 - 無線ネットワークを構成する複数の基地局に対する無線パラメータ制御を行うための制御装置であって、
前記無線ネットワークにおける無線環境情報と、前記複数の基地局がそれぞれ提供する通信エリア毎の通信品質情報を収集する情報収集部と、
前記通信品質情報に基づいて、無線パラメータ制御を実施するか否かを判定する判定部と、
前記判定部により、無線パラメータ制御を実施すると判定された場合に、前記無線環境情報に基づいて、前記複数の基地局のうちの少なくとも1つの基地局に対する無線パラメータを算出する無線パラメータ算出部と、
前記無線パラメータ算出部により算出された無線パラメータを、前記少なくとも1つの基地局に設定する制御部と
を備える制御装置。 - 請求項6に記載の前記制御装置と、前記複数の基地局とを備える無線パラメータ制御システム。
- コンピュータを、請求項6に記載の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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