CN101860872A - Wireless local area network AP positioning method - Google Patents
Wireless local area network AP positioning method Download PDFInfo
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- CN101860872A CN101860872A CN200910081607A CN200910081607A CN101860872A CN 101860872 A CN101860872 A CN 101860872A CN 200910081607 A CN200910081607 A CN 200910081607A CN 200910081607 A CN200910081607 A CN 200910081607A CN 101860872 A CN101860872 A CN 101860872A
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Abstract
The invention discloses a wireless local area network (WLAN) AP positioning method and a mode thereof. The method comprises the following steps of: combining a system log function and RSSI positioning of an AP of a WLAN; testing the field intensity of the WLAN by using a system log; and realizing a precise positioning function by combining a probabilistic algorithm. Due to the adoption of the scheme, a rapid and precise positioning mode can be realized so as to realize a positioning function of the WLAN, save network resources of the WLAN without adopting other functional components on the WLAN or extensive maintenance work, and realize a WLAN positioning method which is rapid, simple and easily implemented.
Description
Technical field
The present invention relates to the method and the mode thereof of wireless local area network AP location, state the function of wireless local area network AP switching and the method for realization thereof in addition more concretely
Technical background
Usually the wireless location technology that adopts mainly contains 1) based on radio wave propagation time (TOA): require base station and portable terminal that point-device clock is arranged, and the both sides of receiving and transmitting signal can realize precise synchronization; 2) based on radio wave propagation time difference (TDOA): this method has reduced the time synchronized requirement, yet, still high to the time precision requirement, and extremely short time error will cause bigger position error; 3) based on electric wave incidence angle (AOA): this method equipment needed thereby complexity is difficult to be suitable in application; 4) unit marks (Containment): this method can only navigate to the scope of a honeycomb or sector, and positioning accuracy is lower; 5) based on signal strength signal intensity (RSS): can extrapolate portable terminal by the signal strength signal intensity that measurement receives.
Fairly simple locate mode just is based on the location of RSS in our WLAN (wireless local area network), if we cooperate the system journal function of AP, two aspects combine, and it is fairly simple that I think that Here it is, again Shi Yong a kind of localization method.We can bring into play the detent edge of AP to greatest extent like this, save the cost of network
Summary of the invention
The objective of the invention is to be to provide a kind of system journal of wireless local area network AP and RSS to locate effective fusion method, use this method can realize simply again location accurately
For reaching this purpose, the invention provides a kind of compatible and sets of plan of system journal and RSS location of wireless local area network AP, comprising:
(1) set up WLAN (wireless local area network), wherein networking AP just has the system journal function, and website is connected to parameter and the state of AP now
(2) measure the AP field strength distribution with Network Stumbler
(3) algorithm of a kind of posterior probability of proposition can provide accurate locate mode like this
Because the complexity of transmission of wireless signals, the same terminal of the wireless signal strength that terminal receives (MU) has certain uncertainty with the distance of former and later two AP.In order to reduce error to greatest extent, we make up the wireless signal strength distribution map, promptly test in the tunnel and locate at a certain distance, and the RSSI value of former and later two AP that obtained wherein, in the RSSI of each position value, is got its maximum as the standard empirical value.The data format that collects is as follows:
(Positon_x
1, Position_x
2, Dis, Rssi_Ap
1, Rssi_AP
2) wherein: Positon_x
1, Positon_x
2Be respectively the distance of terminal apart from former and later two AP; Dis is two distances between the AP; Rssi_AP
1, Rssi_AP
2Be respectively the signal strength values RSSI of former and later two AP of receiving in this position of terminal.
Set up the propagation model database, terminal is when mobile, because the material difference of the shape at diverse location place, pitch of building, roughness, building wall, we are difficult to set up signal propagation model.So, at first, utilize institute's test signal intensity empirical value, adopt the nonlinear least square method match; Then,, set up the propagation model database to dissimilar environment, thereby in locating in real time, at the different radio waves propagation model coefficient of varying environment type selecting.
Description of drawings
Fig. 1 is the implementing procedure figure of the described method of invention;
Fig. 2 is the network structure that adopts the described method of Fig. 1
Fig. 3 is the figure of system journal
The figure of Fig. 4 personnel positioning
Embodiment
Below in conjunction with accompanying drawing the present invention is done further detailed description.
Fig. 1 is the implementing procedure figure of the described method of invention, and according to Fig. 1, at first we set up wlan network earlier, UNICOM's wlan network, and as shown in Figure 2, we just can the sending and receiving data.Below we will accept the data of wlan network transmission, realize the system journal function, in conjunction with RSSI field intensity location, realize the personnel positioning function at last.Mainly be by connecting the AP hardware platform, as shown in Figure 3, and adding as having the mobile site of wireless receiving and emission, as mobile phone or notebook computer.Manage by website, constantly shake hands between website and the AP and be connected, authentication, we can find this SIB of SIB. that generation is upgraded on interface routine, we pass through frame transform to this SIB, make it become Frame, again with its 802.11 frame that converts 802.3 forms to, by bridge module the frame of wave point is passed to wireline interface, sending service in the reception by WLAN passes to server to SIB and gets on. relevant syslog system journal, and monitor with fault to central server and get rid of thereby make AP deliver event information.The access point log record begins (login) and record stops (publishing) activity, we can know MLME state, for example MAC information like this, IP information, various site information such as safe key, rate controlled history, transmission frame control information and frame statistic are for each wireless client charges as Radius.After the system journal function realized, we will be in conjunction with RSSI location and location algorithm.Compare with the wireless channel propagation model, probability fingerprint positioning mode has following characteristics:
(1) algorithm has fast convergence.
(2) positioning accuracy is than higher (＜1m (80%)).The collection sample that experiment showed, the probability fingerprint base is big more, and positional accuracy is high more.
(3) antijamming capability is strong.It is more stable to show as positioning result.Be the effect of its fast convergence on the one hand, on the other hand, the probability fingerprint technique is taken each factor into account with certain probable value, comprises incidents such as the unsteadiness of hardware and extraneous bursty interference.Because accident only participates in calculating with the small probability value, can not cause big fluctuation as the radio transmission model method.Be embodied in: have the people to walk about in the corridor or room door state changes and not influence locating effect substantially.
(4) algorithm shortcomings: because the algorithm complexity needs the data of processing more, the time that might need in position fixing process is longer.Therefore, can fully utilize technology such as user's historical position, wireless channel model, delimit the operational data scope, improve locating speed.
The open wireless network environment is meant the WLAN environment in the present practical application, is characterized in not limiting time, does not limit the place, does not limit employed basic network equipment.Under open WLAN environment, there is diversity in the network facilities, particularly wireless network clients.Therefore, must adopt more method to eliminate this influence, improve constantly the wireless location precision.
(1) distribution of increase AP, rationally disposing AP can increase substantially positioning accuracy.So, need accurate application scenario of location the security monitoring of special objective (for example to) at some, can suitably increase AP quantity, to guarantee precision.When setting up AP, should select relatively spaciousness, signal are difficult for receiving the eminence of interference, for example ceiling, roof etc. as far as possible.
(2) select for use wireless network card can improve positioning accuracy to the signal strength signal intensity reception good.All there is certain destabilizing factor in any communications hardware devices in wireless network.The instability of hardware is brought inestimable sudden noise jamming usually, if according to cost performance and demand, selects for use signal strength signal intensity is received more good wireless network interface card, and the location of moving target is accurate more with making.
(3) sampling density that improves the signal strength data storehouse can be improved positioning accuracy.Strengthen sample quantity and sampling density, by large sample being averaged or the median mode, improve positioning accuracy then.When the sampling interval of database sample point when 2 meters are reduced to 1 meter, average positioning accuracy also has clear improvement.The weak point of this method is to reduce spacing the sampling work amount is increased greatly, and system cost rises.
(4) when location algorithm, in order better to obtain locating effect, if the signal strength signal intensity mean value of getting (setting as required) wireless network card reception in the current location 0.5-2s owing to eliminated the influence of some instantaneous anomaly intensity value, also can significantly improve the positioning accuracy position as input parameter.Though positioning accuracy is high more, location-based service is just accurate more, and system cost is also high more.Therefore, in different zones, should between precision and cost, compromise.For example: in security monitoring, mobile tracking etc. are used, should consider to improve locating accuracy (1m is following) as far as possible; In application such as peripheral information inquiry, positioning accuracy can suitably reduce (as about 5m), as long as can determine that the general orientation of certain moving target is just passable.
Claims (3)
1. the method for wireless local area network AP location comprises:
(1) system journal of wireless lan (wlan) AP and the field intensity positioning combination of RSSI are got up;
(2) utilize the system journal function, obtain and add as having the mobile site of wireless receiving and emission, as mobile phone or notebook computer.Manage by website, constantly shake hands between website and the AP and be connected, authentication, we can know MLME state, for example MAC information like this to produce the SIB. that upgrades, IP information, various site information such as safe key, rate controlled history, transmission frame control information and frame statistic are for each wireless client charges as Radius.
(3) utilize software Network Stumbler test AP field intensity, obtain signal strength signal intensity, coupling system daily record and location probabilistic algorithm draw the location conclusion.
2. the method for a kind of wireless local area network AP according to claim 1 location, it is characterized in that: AP system journal function and RSSI locate mode combine.
3. the method for a kind of wireless local area network AP according to claim 2 location is characterized in that AP system journal function and RSSI locate mode carry out combination according to following steps:
(1) distribution of increase AP, rationally disposing AP can increase substantially positioning accuracy.So, need accurate application scenario of location the security monitoring of special objective (for example to) at some, can suitably increase AP quantity, to guarantee precision.When setting up AP, should select relatively spaciousness, signal are difficult for receiving the eminence of interference, for example ceiling, roof etc. as far as possible.
(2) select for use wireless network card can improve positioning accuracy to the signal strength signal intensity reception good.All there is certain destabilizing factor in any communications hardware devices in wireless network.The instability of hardware is brought inestimable sudden noise jamming usually, if according to cost performance and demand, selects for use signal strength signal intensity is received more good wireless network interface card, and the location of moving target is accurate more with making.
(3) sampling density that improves the signal strength data storehouse can be improved positioning accuracy.Strengthen sample quantity and sampling density, by large sample being averaged or the median mode, improve positioning accuracy then.When the sampling interval of database sample point when 2 meters are reduced to 1 meter, average positioning accuracy also has clear improvement.The weak point of this method is to reduce spacing the sampling work amount is increased greatly, and system cost rises.
(4) when location algorithm, in order better to obtain locating effect, if the signal strength signal intensity mean value of getting (setting as required) wireless network card reception in the current location 0.5-2s owing to eliminated the influence of some instantaneous anomaly intensity value, also can significantly improve the positioning accuracy position as input parameter.Though positioning accuracy is high more, location-based service is just accurate more, and system cost is also high more.Therefore, in different zones, should between precision and cost, compromise.For example: in security monitoring, mobile tracking etc. are used, should consider to improve locating accuracy (1m is following) as far as possible; In application such as peripheral information inquiry, positioning accuracy can suitably reduce (as about 5m), as long as can determine that the general orientation of certain moving target is just passable.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102811103A (en) * | 2012-07-11 | 2012-12-05 | 大连理工大学 | A Wireless Imaging Passive Positioning Method Based on Differential Received Signal Strength Information |
| CN103259878A (en) * | 2013-04-18 | 2013-08-21 | 山东省计算中心 | MAC address capture method for specific target user of wireless local area network |
| CN104023392A (en) * | 2014-06-11 | 2014-09-03 | 百度在线网络技术（北京）有限公司 | Method and equipment of determining position of wireless access point |
| CN104380808A (en) * | 2012-06-29 | 2015-02-25 | 微软公司 | Determining availability of an access network |
| CN104602338A (en) * | 2014-12-22 | 2015-05-06 | 智慧城市信息技术有限公司 | Anchor point-based positioning method and device |
| CN104936145A (en) * | 2015-07-06 | 2015-09-23 | 苏州金立方通讯科技有限公司 | Method for locating wireless local area network AP |
| CN107124704A (en) * | 2017-05-17 | 2017-09-01 | 成都理工大学 | It is a kind of that recognition methods is combined with mobile phone inside and outside the seismic ruins of field strength based on multiple spot MAC |
| CN107302752A (en) * | 2017-08-21 | 2017-10-27 | 天网互联科技（深圳）有限公司 | A kind of office space mobile phone positioning method positioned based on bluetooth and alignment system |
| CN103024659B (en) * | 2011-09-22 | 2018-09-11 | 嘉兴高恒信息科技有限公司 | A kind of location method and system |
| US10154452B2 (en) | 2012-06-29 | 2018-12-11 | Microsoft Technology Licensing, Llc | Determining suitability of an access network |
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2009
- 2009-04-07 CN CN200910081607A patent/CN101860872A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103024659B (en) * | 2011-09-22 | 2018-09-11 | 嘉兴高恒信息科技有限公司 | A kind of location method and system |
| CN104380808B (en) * | 2012-06-29 | 2019-01-04 | 微软技术许可有限责任公司 | For determining the mobile terminal and medium of the availability of access network |
| US10154452B2 (en) | 2012-06-29 | 2018-12-11 | Microsoft Technology Licensing, Llc | Determining suitability of an access network |
| CN104380808A (en) * | 2012-06-29 | 2015-02-25 | 微软公司 | Determining availability of an access network |
| CN102811103A (en) * | 2012-07-11 | 2012-12-05 | 大连理工大学 | A Wireless Imaging Passive Positioning Method Based on Differential Received Signal Strength Information |
| CN103259878B (en) * | 2013-04-18 | 2015-09-30 | 山东省计算中心（国家超级计算济南中心） | A kind of MAC Address catching method for WLAN (wireless local area network) specific objective user |
| CN103259878A (en) * | 2013-04-18 | 2013-08-21 | 山东省计算中心 | MAC address capture method for specific target user of wireless local area network |
| CN104023392B (en) * | 2014-06-11 | 2017-07-14 | 百度在线网络技术（北京）有限公司 | The method and apparatus for determining the position of WAP |
| CN104023392A (en) * | 2014-06-11 | 2014-09-03 | 百度在线网络技术（北京）有限公司 | Method and equipment of determining position of wireless access point |
| CN104602338A (en) * | 2014-12-22 | 2015-05-06 | 智慧城市信息技术有限公司 | Anchor point-based positioning method and device |
| CN104936145A (en) * | 2015-07-06 | 2015-09-23 | 苏州金立方通讯科技有限公司 | Method for locating wireless local area network AP |
| CN107124704A (en) * | 2017-05-17 | 2017-09-01 | 成都理工大学 | It is a kind of that recognition methods is combined with mobile phone inside and outside the seismic ruins of field strength based on multiple spot MAC |
| CN107124704B (en) * | 2017-05-17 | 2020-09-01 | 成都理工大学 | A joint identification method of mobile phones inside and outside earthquake debris based on multi-point MAC and field strength |
| CN107302752A (en) * | 2017-08-21 | 2017-10-27 | 天网互联科技（深圳）有限公司 | A kind of office space mobile phone positioning method positioned based on bluetooth and alignment system |
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