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PublicatienummerCN104581813 A
PublicatietypeAanvraag
AanvraagnummerCN 201510044241
Publicatiedatum29 april 2015
Aanvraagdatum28 jan 2015
Prioriteitsdatum28 jan 2015
Publicatienummer201510044241.0, CN 104581813 A, CN 104581813A, CN 201510044241, CN-A-104581813, CN104581813 A, CN104581813A, CN201510044241, CN201510044241.0
Uitvinders王玉玲, 宫淑兰, 汪明
Aanvrager山东建筑大学
Citatie exporterenBiBTeX, EndNote, RefMan
Externe links:  SIPO, Espacenet
Dynamic channel allocation method of WLAN (wireless local area network) system
CN 104581813 A
Samenvatting
The invention discloses a dynamic channel allocation method of a WLAN (wireless local area network) system. AP (access point) nodes of the WLAN system measure signal strength, generate signal strength test reports and transmit the signal strength test reports to a wireless AC (access controller); the wireless AC builds a system interference model and sets interference model parameters through the signal strength; calculating is performed by optimization to obtain a group of channel numbers allowing a smallest interference model; the wireless AC allocates a running frequency point for each AP node according to the calculated channel numbers and distributes the running frequency points to the AP nodes through configuration files; the AP nodes adjust running frequencies according to the configuration files. The dynamic channel allocation method helps reduce intra-system interference and improve system capacity.
Claims(6)  vertaald uit het Chinees
1. 一种WLAN系统动态信道分配方法,其特征是,包括以下步骤: 步骤一:WLAN系统中AP节点完成信号强度测量,并生成信号强度测试报告,将测试报告发送给AC无线控制器; 步骤二:AC无线控制器建立系统干扰模型,并采用信号强度设置干扰模型参数,采用最优化方法计算得到使得干扰模型最小的一组信道编号; 步骤三:AC无线控制器根据计算得到的信道编号为每个AP节点的配置工作频点,并将工作频点通过配置文件下发给每个AP节点;AP节点根据配置文件调整工作频率。 A WLAN system dynamic channel allocation method, which is characterized by comprising the following steps: Step 1: WLAN systems AP node completion signal strength measurements, and generate test reports signal strength, will send a test report to the AC wireless controller; step two: AC wireless controller establishes a system interference model, and using the signal strength interference model set parameters, calculated using the optimization method enables minimal interference model of a group of channel number; Step three: AC wireless controller based on the calculated channel numbered Configuration working frequency node of each AP, and working frequency point of each node by configuring the document issued to the AP; AP node to adjust the working frequency according to the profile.
2. 如权利要求1所述的一种WLAN系统动态信道分配方法,其特征是,所述步骤一的具体过程为:初始时刻,AC无线控制器将所有AP节点配置为同一信道,即将所有AP节点的工作频点设置为设定频率,发送功率设置为P,并指明需周期性测量信号强度,生成配置文件并下发到所有n个AP,AP节点按照配置文件给定参数进行工作,启动定时器,当定时器到期,AP节点扫描所有信道,检测各个信道上接收到的信号强度以及产生该信号的AP节点的相关信息,生成信号强度报告,发送给AC无线控制器。 All AP upcoming initial moment, AC wireless controller will all AP nodes are configured for the same channel: 2. A WLAN system dynamic channel allocation method according to claim 1, wherein said step a specific procedure for the Working frequency set node set frequency, transmission power is set to P, and periodic measurements indicate the signal strength required to generate configuration files and issued to all n AP, AP node configuration file in accordance with the given parameters to work, start timer, when the timer expires, AP node scans all channels, detect the relevant information for each channel of the received signal strength and the signal generated AP node generates a signal strength report, sent to the AC wireless controller.
3. 如权利要求1所述的一种WLAN系统动态信道分配方法,其特征是,所述步骤二中,系统干扰模型定义为: 3. A WLAN system dynamic channel allocation method according to claim 1, characterized in that said second step, the system interference model is defined as:
Figure CN104581813AC00021
其中S 为系统总干扰,4,4〜4为11^网络中的11个4?节点的信道编号,S^为APi即第i个AP节点对AP」即第j个AP节点的干扰值。 Where S is the total interference system, 4,4~4 network of 11 ^ 11 4? Channel number of nodes, S ^ is APi namely the i-th value of AP AP node interference "that is the j-th AP nodes.
4. 如权利要求3所述的一种WLAN系统动态信道分配方法,其特征是,Su其定义为接收到的信号功率与AP的信道相关的函数: 4. A WLAN system dynamic channel allocation method according to claim 3, wherein, Su defined as the received signal power and the AP's channel-related functions:
Figure CN104581813AC00022
其中:Pi」为APi收到的来自AP」的信号强度,fi和f」为APJPAP」所使用的信道号。 Where: Pi "as APi received signal strength from the AP," a, fi and f "as the channel number APJPAP 'use.
5. 如权利要求1所述的一种WLAN系统动态信道分配方法,其特征是,所述WLAN系统包含1个AC和n个AP,n为大于等于1的整数。 5. A WLAN system dynamic channel allocation method according to claim 1, characterized in that the system comprises a WLAN AC and the n-th AP, n is an integer of 1.
6. 如权利要求1所述的一种WLAN系统动态信道分配方法,其特征是,所述AP节点进行信号强度测量可以由AC无线控制器发送消息触发进行。 A WLAN system dynamic channel allocation method according to claim 6, wherein the AP node signal strength measurements may be sent by AC wireless controller message triggers were.
Beschrijving  vertaald uit het Chinees
一种WLAN系统动态信道分配方法 One kind WLAN system dynamic channel allocation method

技术领域 TECHNICAL FIELD

[0001] 本发明涉及WLAN通信领域中的频率规划技术,尤其涉及基于802. 11协议的WLAN 系统中AP节点的工作频率选择方法。 [0001] The present invention relates to the field of communications in WLAN frequency planning techniques, in particular, it relates to 802.11 based WLAN system protocol AP node operating frequency selection method.

背景技术 Background technique

[0002] 无线局域网的出现作为一种广泛使用的接入技术,提供宽带无线接入到Internet。 [0002] The emergence of wireless local area network access technology as a widely used to provide broadband wireless access to the Internet. 基于802. 11的WLAN系统为无线终端随时随地的宽带接入Internet提供了可能,在校园、宾馆以及办公楼等领域得到了广泛应用。 802.11-based WLAN systems anytime, anywhere wireless broadband access Internet terminal offers the possibility, in schools, hotels and office buildings and other fields has been widely used. WLAN系统包括AC(无线控制器)、 AP(无线接入点)和STA(站点即终端设备)。 WLAN system includes AC (wireless controller), AP (wireless access point) and STA (ie site terminal equipment).

[0003] 为了保证对局域网内的终端提供随时随地的高速接入,WLAN的建设通常需要布置大量AP节点,为了保证AP节点获得最大吞吐量,必须降低AP之间的干扰,合理的频率规划是成为WLAN建设的关键技术之一。 [0003] In order to ensure the terminal LAN provides anytime, anywhere high-speed access, WLAN construction usually requires a lot of AP nodes are arranged, in order to ensure maximum throughput AP node, it must reduce interference between AP and reasonable frequency planning one of the key technologies WLAN building. 在实际应用过程中,受到电源的提供位置、用户分布的非均匀性等多种因素的影响,很难按照某一种统一的方案实现整个无线网络的覆盖,因此对于这种非规则的AP布放,需要一种有效的频率规划手段。 In practical application process, provided by the location of the power and influence of non-uniformity distribution of users and other factors, it is difficult to achieve coverage of the entire wireless network in accordance with a certain kind of unified solution, so for such a non-Rules AP cloth put the need for an effective means of frequency planning.

发明内容 SUMMARY OF THE INVENTION

[0004] 为解决现有技术存在的不足,本发明公开了一种WLAN系统动态信道分配方法,本专利针AP节点工作频点的规划问题,申请基于信道干扰模型的频率规划。 [0004] To solve the problem of the prior art, the present invention discloses a WLAN system dynamic channel allocation method, planning of the patent needle AP node working frequency, the application is based on frequency planning channel interference model. 主要思想是建立WLAN系统的干扰模型,以干扰模型取值最小为目的设定目标函数,通过采用最优化方法求一组AP节点的频率参数。 The main idea is to establish a WLAN system interference model, interference model to a minimum value for the purpose of setting the objective function, find a set of frequency parameters AP node by using the optimization method.

[0005] 为实现上述目的,本发明的具体方案如下: [0005] To achieve the above object, a specific embodiment of the present invention are as follows:

[0006] 一种WLAN系统动态信道分配方法,包括以下步骤: [0006] A WLAN system dynamic channel allocation method comprising the steps of:

[0007] 步骤一:WLAN系统中AP节点完成信号强度测量,并生成信号强度测试报告,将测试报告发送给AC无线控制器; [0007] Step one: WLAN systems AP node completion signal strength measurements, and generate test reports signal strength, it will send a test report to the AC wireless controller;

[0008] 步骤二:AC无线控制器建立系统干扰模型,并采用信号强度设置干扰模型参数, 采用最优化方法计算得到使得干扰模型最小的一组信道编号; [0008] Step two: AC wireless controller establishes a system interference model, and using the signal strength interference model set parameters, calculated using the optimization method enables minimal interference model of a set of channel number;

[0009] 步骤三:AC无线控制器根据计算得到的信道编号为每个AP节点配置工作频点,并将工作频点通过配置文件下发给每个AP节点;AP节点根据配置文件调整工作频率。 [0009] Step three: AC wireless controller based on the calculated channel number for each node configuration AP working frequency and work frequency by configuring the document issued to each AP node; AP node to adjust the working frequency according to the configuration file .

[0010] 所述步骤一的具体过程为:初始时刻,AC无线控制器将所有AP节点配置为同一信道,即将所有AP节点的工作频点设置为设定频率,发送功率设置为p,并指明需周期性测量信号强度,生成配置文件并下发到所有η个AP节点(假设分别为AP1, AP2,……,APn),AP 节点按照配置文件给定参数进行工作,启动定时器,当定时器到期,AP节点扫描所有信道, 检测各个信道上接收到的信号强度以及产生该信号的AP节点的相关信息,生成信号强度报告,发送给AC无线控制器。 The specific process [0010] One of the steps as follows: initial time, AC wireless controller will all AP nodes are configured for the same channel, all operating frequencies set about to AP node is set frequency, transmission power is set to p, and specify periodically measure the signal strength required to generate configuration files and issued to all η one AP nodes (assuming respectively AP1, AP2, ......, APn), AP node in the configuration file for a given parameter to work, start a timer, when the timer expires, AP node scans all channels, each channel detects the received signal strength and AP nodes generate relevant information of the signal, generating a signal strength report, sent to the AC wireless controller.

[0011] 所述步骤二中,系统干扰模型定义为: [0011] The step two, the system interference model is defined as:

[0012] [0012]

Figure CN104581813AD00041

[0013] 其中δ (Lf^fn)为系统总干扰,f1; &"4为WLAN网络中的η个AP节点的信道编号,S u为AP i即第i个AP节点对AP」即第j个AP节点)的干扰值。 [0013] where δ (Lf ^ fn) for the total system interference, f1; & "4 of WLAN networks η an AP node channel number, S u as AP i ie the i-th AP nodes AP 'that is the j an AP node) interference value.

[0014] δ u其定义为接收到的信号功率与AP的工作信道相关的函数: [0014] δ u which is defined as the received signal power and the AP's working channel related functions:

[0015] [0015]

Figure CN104581813AD00042

[0016] 其中:Pij为AP艰到的来自AP」的信号强度,f种f」为AP ^ AP」所使用的信道号。 [0016] where: Pij is difficult to AP's signal strength from the AP, "a, f species f" as the channel number AP ^ AP "is used.

[0017] 所述WLAN系统包含1个AC和η个AP,η为大于等于1的整数。 [0017] The WLAN system comprises an AC and a η AP, η is an integer of 1.

[0018] 所述AP节点进行信号强度测量可以由AC无线控制器发送消息触发进行。 [0018] The AP node may transmit signal strength measurements performed by the access controller AC message be triggered.

[0019] 工作原理:初始化时,AC设置所有AP工作在同一信道fi,且采用标准发送功率P, AC将配置文件下发给所有AP。 [0019] works: initialization, AC set all AP in the same channel fi, and the use of standard transmission power P, AC configuration document issued to all the AP.

[0020] AP按照接收到的配置文件工作,并周期性的检测来自其他AP的信号强度,生成信号强度报告,并将信号强度报告发送给AC。 [0020] AP according to the received configuration files to work, and periodically detecting the signal strength from another AP generates reports signal strength and signal strength reports transmitted to AC.

[0021] AC以得到的信号强度为设置参数Pij,建立系统干扰模型。 [0021] AC signal strength to get to set the parameters Pij, establish systems interference model.

[0022] 采用最优化算法求取使系统干扰最小的一组参数(f\,&∑∑ fn); [0022] The optimization algorithm of the system with minimal disruption to strike a set of parameters (f \, & ∑∑ fn);

[0023] 将(Lf^fn)作为η个AP节点的信道号,根据每个AP节点的编号设置该节点的工作频率,生成配置文件,并下发给各个AP节点。 [0023] The (Lf ^ fn) as η an AP node channel number, according to the number of nodes on each AP to set the operating frequency of the node generates the configuration file, and distributed to the AP next node.

[0024] AP节点接收并按照配置文件调整工作频率。 [0024] AP node receives and adjusts the operating frequency in the configuration file.

[0025] 本发明的有益效果: [0025] The present invention beneficial effects:

[0026] 本专利针AP节点工作频点的规划问题,提出了一种基于信道干扰模型的频率规划方法。 [0026] Programming of the patent needle AP node operating frequency point, we propose a model based on channel interference frequency planning methods. 该方法的实施有助于减小系统内的干扰、提高系统容量。 The implementation of the method within the system helps reduce interference, increase system capacity.

附图说明 Brief Description

[0027] 图IWLAN系统示意图; [0027] FIG IWLAN system diagram;

[0028] 图2AC信道分配工作流程; [0028] FIG 2AC channel assignment workflow;

[0029] 图3ΑΡ信道分配工作流程。 [0029] FIG 3ΑΡ channel assignment workflow.

具体实施方式: DETAILED DESCRIPTION:

[0030] 下面结合附图对本发明进行详细说明:如图1所示,一个WLAN系统中包含1个AC 和η个AP,初始时刻,AC将所有AP配置为1信道,及将所有AP的工作频点设置为2. 412GHz, 发送功率设置为500mW,并指明需周期性测量信号强度,生成配置文件并下发到所有η个AP。 [0030] with reference to the following detailed description of the invention: As shown, a WLAN system includes an AC and η an AP 1, the initial time, AC will all AP configured as a channel, and will work all AP frequency is set to 2. 412GHz, transmission power is set to 500mW, and require periodic measurements indicate the signal strength, generates configuration files and issued to all η one AP. AP节点按照配置文件给定参数进行工作,启动定时器,当定时器到期,AP节点扫描所有信道(2. 4GHz频段我国为1-13号),检测各个信道上接收到的信号强度以及发送端ΑΡ,生成信号强度报告,发送给AC。 AP node configuration file in accordance with the given parameters to work, start the timer, when the timer expires, AP node scans all channels (2. 4GHz band for the number of 1-13), testing each channel of the received signal strength and transmit end ΑΡ, generates a signal strength report, sent to the AC. AC节点收到的来自η个AP的信号强度报告,根据信号强度报告得到Pij,即APi接收到的来自AP」的信号强度,建立系统干扰模型 Η AC node receives from an AP signal strength reports, reports based on the signal strength obtained Pij, i.e. APi received signal strength from AP ", the establishment of system interference model

Figure CN104581813AD00043

[0031] 其中,δ的,f2〜fn)为系统总干扰,f1; &"4为WLAN网络中的η个AP节点的信道编号,S u为AP i (第i个AP节点)对APj (第j个AP节点)的干扰值。 [0031] where, δ's, f2~fn) for the total system interference, f1; & "4 of WLAN network node AP η a channel number, S u as AP i (i-th AP nodes) to APj ( AP j-th node) of the interference level.

[0032] δ ^_其定义为接收到的信号功率与AP的信道相关的函数: [0032] δ ^ _ defined as the received signal power and the AP's channel-related functions:

[0033] [0033]

Figure CN104581813AD00051

[0034] 其中:Pij为AP艰到的来自AP」的信号强度,f种f」为AP ^ AP」所使用的信道号。 [0034] where: Pij is difficult to AP's signal strength from the AP, "a, f species f" as the channel number AP ^ AP "is used.

[0035] 采用最优化算法求取使系统干扰最小的一组参数(f\,ff fn); [0035] The optimization algorithm of the system with minimal disruption to strike a set of parameters (f \, ff fn);

[0036] 将作为η个AP节点的信道号,根据每个AP节点的编号设置该节点的工作频率,生成配置文件,并下发给各个AP节点。 [0036] The AP node as η a channel number, according to the number of nodes on each AP to set the operating frequency of the node generates the configuration file, and distributed to the AP next node.

[0037] AP节点接收配置文件并按照配置文件调整工作频率。 [0037] AP node receives the configuration file and adjust the operating frequency in the configuration file.

[0038] AC的工作流程如图2所示,设置η个AP的工作信道为k,下发配置文件,接收来自AP的信号强度报告,干扰模型参数设置,采用最优化方法求取信道参数组,判断信道参数是否更新,如果是,则设置各个AP工作频点,下发配置文件。 [0038] AC workflow shown in Figure 2, set η a working channel for the AP k, issued a profile of the received signal strength from the AP report, interference model parameter settings, using the optimization method channel parameters set to strike It determines whether to update the channel parameters, and if yes, then set each AP working frequency to deliver the configuration file.

[0039] AP的工作流程如图3所示,开始,判断定时器是否超时及AC是否要求进行信号强度测试,如果是,扫描信道,生成信号强度报告,向AC发送信号强度报告。 [0039] AP workflow shown in Figure 3, starts, it is determined whether or not the timer has timed out and the AC test signal strength required, and if so, the channel scan, generate reports signal strength, the signal strength reports transmitted to the AC. AC -般通过有线连接AP节点,AP节点通过无线连接终端设备,终端设备为手机,笔记本之类的。 AC - like the AP through a wired connection node, AP node through a wireless connection to the terminal device, the terminal device for mobile phones, laptops and the like.

[0040] 上述虽然结合附图对本发明的具体实施方式进行了描述,但并非对本发明保护范围的限制,所属领域技术人员应该明白,在本发明的技术方案的基础上,本领域技术人员不需要付出创造性劳动即可做出的各种修改或变形仍在本发明的保护范围以内。 [0040] While the above with reference to specific embodiments of the present invention have been described, but not limit the scope of the present invention, one of ordinary skill in the art should understand that, on the basis of technical solution of the present invention, the skilled in the art without pay all kinds of creative work can be made to modify or deform still within the scope of the invention.

Patentcitaties
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Niet-patentcitaties
Referentie
1 *向望: "基于CAPWAP的无线资源管理技术研究与优化", 《中国优秀硕士学位论文全文数据库信息科技辑》
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Classificaties
Internationale classificatieH04W24/10, H04W72/08
CoŲperatieve classificatieH04W72/082, H04W72/08, H04W24/10
Juridische gebeurtenissen
DatumCodeGebeurtenisBeschrijving
29 april 2015C06Publication
27 mei 2015C10Entry into substantive examination