CN103648163A - Indoor positioning method applied to wireless local area network - Google Patents
Indoor positioning method applied to wireless local area network Download PDFInfo
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- CN103648163A CN103648163A CN201310651397.6A CN201310651397A CN103648163A CN 103648163 A CN103648163 A CN 103648163A CN 201310651397 A CN201310651397 A CN 201310651397A CN 103648163 A CN103648163 A CN 103648163A
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Abstract
The invention relates to an indoor positioning method applied to a wireless local area network. The wireless local area network with the characteristics of high-speed and rapid communication and simple and convenient deployment is widely applied to occasions mainly including an indoor environment and hot-spot areas with people's activities. The positioning technology applied to the wireless local area network is brought forward; and a novel technical route is provided for the enterprises customers to solve a problem of wireless local area network security based on the WIFI-based seamless positioning technology. Because of the WIFI, the transmission function can be provided for wireless access and data and indoor positioning can also be realized. Under the circumstances that there is no need to increase hardware additionally, the WIFI network analyzes the signal strength or the signal to noise ratio of wireless network equipment by an access point so as to deduce and determine a position of a target object.
Description
Technical field
The present invention relates to WLAN (wireless local area network), indoor positioning, information gathering and treatment technology, relate in particular to a kind of indoor orientation method that is applied to WLAN (wireless local area network).
Background technology
Global positioning system is the very successful and quite ripe status technology of using present stage, although can be provided and be approached global location coverage by GPS.But, in the densely covered city of indoor and high building because GPS sensing cannot be located less than satellite-signal, under complicated indoor environment, the most general location technology of application is mainly sensor technology, this technology is by the sensor network of disposing in advance, perception enters the object of relevant range, complete the location of object, typical system has infrared sensing navigation system, vibration/sound sensing positioning system etc.Sensing positioning system needs special equipment and network support, and is limited to sensing range and the sensing network deployment of transducer, cannot complete accurate location and positioning service covering on a large scale.
In 802.11 standards, wireless network card and AP can measure the signal strength signal intensity of radio frequency signal, i.e. received signal strength indicator RSSI.The signal strength signal intensity of the signal frame that the signal strength signal intensity of the signal frame that wireless network card measurement AP sends, AP measurement wireless network card send.Conventionally the transmitting power of AP is higher than wireless network card, and signal attenuation is more stable than wireless network card, the mode of a kind of RSSI of measurement before therefore generally all adopting.Compare with outdoor positioning, indoor positioning is higher to the requirement of positioning precision.In addition, in the interior space, there is many disturbing factors, as various bodies of wall, partition, people or various furniture furnishings etc. all can impact the transmission of wireless signal, as the decay of wireless signal, reflection, scattering and multipath effect etc.Even if a people stands on fixing position, its direction is towards AP or back to AP, and signal strength signal intensity also has very large difference.These have all increased the difficulty of WLAN (wireless local area network) indoor positioning.
The expansion of WIFI network coverage has also promoted the development of the terminal of integrating WIFI receiver module.Wireless aps is only done simple signals collecting work, and location Calculation is completed by location-server.Based on load balancing, consider, the location-server of the Web server of response position request and operation location Calculation is independently separated as much as possible.Client is the wireless signal strength that mobile device (as notebook, smart mobile phone etc.) is mainly used in gathering periphery AP, and submit signal characteristic to location-server, positioning analysis software is by calculated data source---the wireless signal strength receiving, the mapping relations that during with original field test, electronic chart and positional information are set up position calculating, thereby obtain the location estimation of mobile terminal.In addition, because the antijamming capability of WiFi is strong, have good network stabilization and at a high speed and the characteristic such as high-quality transfer of data, service system is transmitted a large amount of information provides reliable assurance.Nowadays WiFi technology has been the standard configuration of all intelligent family moving platforms in addition, utilizes extensively general WiFi system to do the technology that location is a low cost and easy realization.
Summary of the invention
1, technical problem to be solved
Current sensing positioning system needs special equipment and network support, and is limited to sensing range and the sensing network deployment of transducer, cannot complete accurate location and positioning service covering on a large scale.
2, technical scheme
In order to overcome the above problems, the invention provides a kind of indoor orientation method that is applied to WLAN (wireless local area network), comprising: wireless aps, positioning analysis software (customization), Web server, location-server, database server.Wireless aps is only done simple signals collecting work, and location Calculation is completed by location-server.Based on load balancing, consider, the location-server of the Web server of response position request and operation location Calculation is independently separated as much as possible.Client is the wireless signal strength that mobile device (as notebook, smart mobile phone etc.) is mainly used in gathering periphery AP, and submit signal characteristic to location-server, positioning analysis software is by calculated data source---the wireless signal strength receiving, the mapping relations that during with original field test, electronic chart and positional information are set up position calculating, thereby obtain the location estimation of mobile terminal.This scheme comprise off-line analysis and online location two off-line analysis stages in stage mainly carry out that indoor reference point is chosen, RSS Threshold, RSS data build storehouse and wireless aps position estimation; Online positioning stage, the wireless aps number and the RSS that according to user terminal, receive, select triangle location algorithm or fingerprint location algorithm to carry out position calculation.
3, beneficial effect
The plurality of advantages such as WLAN (wireless local area network) has that equipment is installed fast, configuration is simple, disposes flexibly, low cost, high scalability, in recent years Ge great telecom operators widely popularize universally, WLAN (wireless local area network) has become high-speed radio access network of new generation.Thus, the WLAN (wireless local area network) indoor positioning technical method based on wifi overlay network of introducing herein just tool has the following advantages: 1, positioning precision is high; 2, network security performance is strong; 3, network construction cost is low.
Accompanying drawing explanation
Fig. 1 wireless local network positioning system
Embodiment
Below by embodiment, the present invention is described in detail.
Embodiment 1
Its working method is as follows:
1, reference point is chosen
Reference point refers to that the measurement of wireless aps signal and collection point are in the off-line analysis stage; first room area is divided into some grids; each net center of a lattice is considered as to reference point because the large young pathbreaker of grid directly affects computation complexity and the precision of location; can carry out grid division according to situations such as indoor barrier personnel dense degree, conventionally the more complicated area grid of environment is less
2, RSS Threshold
Triangle location and fingerprint location algorithm are applicable to respectively different wireless aps signal environments, RSS threshold value is for the switching of two algorithms, the validity that improves indoor mixed positioning can be according to indoor signal propagation model and positioning accuracy request, RSS threshold value RSSthres in counting chamber.
3, RSS data are built storehouse
Owing to being subject to the impact of the multiple disturbing factors such as scattering refraction barrier; during wireless aps signals collecting, resulting RSS data have unsteadiness and in each reference point, carry out multiple signal collection; calculating the RSS mean value of each wireless aps and depositing RSS database data interrecord structure in is (RefID; APMAC; AvgRSS, X, Y); wherein, RefID is reference point numbering; APMAC is the Media Access Control address of wireless aps; AvgRSS is the average RSS value of wireless aps; X, Y is respectively the position coordinates of reference point
4, wireless aps position estimation
After signals collecting completes, each wireless aps is selected to 3 reference points of AvgRSS maximum, utilized the position of 3 reference points, adopt triangle centroid algorithm to estimate the position of each wireless aps, and store in RSS database.
5, customer location calculates
When system is received the Location Request that user terminal sends, to locate online, its process prescription is as follows
(1) user terminal is sent to locating module by a plurality of wireless aps signals that receive;
(2) locating module contrasts the MAC Address of a plurality of wireless aps that receive respectively with RSS database, judges that whether the position of these wireless aps is known;
(3) if the wireless aps of location aware has 3 RSS values at least higher than RSSthres, first utilize signal propagation model to calculate respectively 3 wireless aps that RSS value is the highest and the distance of user terminal, then, adopt triangle centroid algorithm calculate user terminal location and return.
Claims (4)
1. an indoor orientation method that is applied to WLAN (wireless local area network), comprise: wireless aps, positioning analysis software (customization), Web server, location-server, database server, wireless aps is only done simple signals collecting work, and location Calculation is completed by location-server.
2. a kind of indoor orientation method that is applied to WLAN (wireless local area network) as claimed in claim 1, is characterized in that: based on load balancing, consider, the location-server of the Web server of response position request and operation location Calculation is independently separated as much as possible.
3. a kind of indoor orientation method that is applied to WLAN (wireless local area network) as claimed in claim 1, it is characterized in that: client is the wireless signal strength that mobile device is mainly used in gathering periphery AP, and submit signal characteristic to location-server, positioning analysis software is by calculated data source---the wireless signal strength receiving, the mapping relations that during with original field test, electronic chart and positional information are set up position calculating, thereby obtain the location estimation of mobile terminal.
4. a kind of indoor orientation method that is applied to WLAN (wireless local area network) as claimed in claim 1, is characterized in that: this scheme comprise off-line analysis and online location two off-line analysis stages in stage mainly carry out that indoor reference point is chosen, RSS Threshold, RSS data build storehouse and wireless aps position estimation; Online positioning stage, the wireless aps number and the RSS that according to user terminal, receive, select triangle location algorithm or fingerprint location algorithm to carry out position calculation.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104457740A (en) * | 2014-12-05 | 2015-03-25 | 江苏万维艾斯网络智能产业创新中心有限公司 | Indoor navigation system and method for accurately positioning by virtue of indoor navigation system |
| CN104703128A (en) * | 2014-11-10 | 2015-06-10 | 浙江大学城市学院 | Indoor positioning system and method based on WLAN wireless signal strength |
| CN104954978A (en) * | 2014-03-25 | 2015-09-30 | 张兆龙 | Method and device for wireless network ranging |
| CN106255201A (en) * | 2016-08-19 | 2016-12-21 | 北京羲和科技有限公司 | A kind of indoor orientation method and device |
| CN106537438A (en) * | 2015-06-11 | 2017-03-22 | Sk普兰尼特有限公司 | Party management service method and device therefor |
| CN108989984A (en) * | 2018-08-27 | 2018-12-11 | 云南电网有限责任公司电力科学研究院 | A kind of bluetooth localization method |
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| CN103281777A (en) * | 2013-04-25 | 2013-09-04 | 浙江大学 | Differential positioning method based on WiFi (wireless fidelity) |
| CN103841639A (en) * | 2013-12-05 | 2014-06-04 | 镇江高科科技信息咨询有限公司 | Wireless local area network technology for indoor positioning |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102348160A (en) * | 2011-07-15 | 2012-02-08 | 中国电信股份有限公司 | Multimode signal-based positioning method, system and positioning platform |
| CN103281777A (en) * | 2013-04-25 | 2013-09-04 | 浙江大学 | Differential positioning method based on WiFi (wireless fidelity) |
| CN103841639A (en) * | 2013-12-05 | 2014-06-04 | 镇江高科科技信息咨询有限公司 | Wireless local area network technology for indoor positioning |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104954978A (en) * | 2014-03-25 | 2015-09-30 | 张兆龙 | Method and device for wireless network ranging |
| CN104954978B (en) * | 2014-03-25 | 2019-07-12 | 张兆龙 | Wireless network distance measuring method and device |
| CN104703128A (en) * | 2014-11-10 | 2015-06-10 | 浙江大学城市学院 | Indoor positioning system and method based on WLAN wireless signal strength |
| CN104703128B (en) * | 2014-11-10 | 2018-10-23 | 浙江大学城市学院 | A kind of indoor locating system and method based on WLAN wireless signal strengths |
| CN104457740A (en) * | 2014-12-05 | 2015-03-25 | 江苏万维艾斯网络智能产业创新中心有限公司 | Indoor navigation system and method for accurately positioning by virtue of indoor navigation system |
| CN104457740B (en) * | 2014-12-05 | 2017-12-01 | 江苏万维艾斯网络智能产业创新中心有限公司 | Indoor navigation system and accurate positioning method thereof |
| CN106537438A (en) * | 2015-06-11 | 2017-03-22 | Sk普兰尼特有限公司 | Party management service method and device therefor |
| CN106255201A (en) * | 2016-08-19 | 2016-12-21 | 北京羲和科技有限公司 | A kind of indoor orientation method and device |
| CN108989984A (en) * | 2018-08-27 | 2018-12-11 | 云南电网有限责任公司电力科学研究院 | A kind of bluetooth localization method |
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Application publication date: 20140319 |