CN104717666A - Method and device for positioning APs - Google Patents
Method and device for positioning APs Download PDFInfo
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- CN104717666A CN104717666A CN201310693890.4A CN201310693890A CN104717666A CN 104717666 A CN104717666 A CN 104717666A CN 201310693890 A CN201310693890 A CN 201310693890A CN 104717666 A CN104717666 A CN 104717666A
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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
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
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Abstract
The invention discloses a method and device for positioning APs. The method includes the steps of receiving testing signals transmitted by the APs; obtaining the RSSIs of the testing signals; extracting the APs belonging to a tested area through a correlation rule in a data mining method and the testing signals; determining the coordinates of the APs belonging to the tested area according to the RSSIs corresponding to the APs belonging to the tested area.
Description
Technical field
The present invention relates to the communication technology, particularly relate to a kind of access point (Access Point, AP) localization method and device.
Background technology
At present, realize WLAN (Wireless Local Area Networks, WLAN) intelligent planning and optimisation technique, need accurately to locate AP.
Usually, want the AP knowing that certain floor is all, the beacon frame mainly sent by detection wireless AP determines all AP belonging to this floor, but this method has two obvious drawbacks.The first, because the transmitting power of AP is certain, add the decay on propagation path, cause the limited coverage area of AP, so at certain pinpoint test of floor, may can only receive the beacon frame of a part of AP, the AP so obtained may be a part of AP of this floor; The second, the propagation attenuation penetrating floor due to AP is not very large, and so testing the AP obtained at This floor, is likely the AP of other floors.These two drawbacks, the AP of other floors can be caused also to be positioned at current floor, or the location AP of mistake are in the position of floor, and AP floor ownership will to judge and locate to bring very large error.
In wlan network, global positioning system (Global Positioning System, GPS) can as the mode providing locating information.In an outdoor environment, the density ratio of AP is lower, and GPS is good selection.But in high density network, move AP increase GPS function to each too expensive, unrealistic.And use GPS to obtain high-precision locating effect and must use differential technique, be difficult to realize.Server-aided gps system provides positioning service, the requirement that positioning precision can meet international standards can to outdoor AP.Although also can position indoor AP with GPS, the precision of location only indicate the building at AP place, can not be accurate to floor certain a bit.
Other location technologies such as indoor AP locating and tracking technology based on electric wave signal has suffered from great difficulty, this is because the electric wave signal made for locating all is produced the very complicated decay of form and decline by the various objects such as floor in a narrow space, wall and human body, like this, if depend on the signal strength signal intensity that this simple model calculating somewhere indoor location receives, then this signal strength signal intensity can be estimated too high, can be especially like this in the building that has many rooms separated by wall.Most wireless location technology is all based on (the Time Of Arrival time of advent, TOA), the time of advent poor (Time Difference Of Arrival, and arrival direction (Direction Of Arrival TDOA), DOA) this category information, in fact, positioning result based on these technology is only only reliably in the dominant situation of intervisibility signal, thus cannot be applicable to indoor environment.
In addition, distance under indoor situations between AP is shorter, and there is the non-rectilinear propagation conditions such as more serious reflection, diffraction and diffraction, and it is quite close on each bar multipath component time of same AP signal, the lack of resolution of existing equipment is with each bar multipath so close on the differentiation time, so accurate TOA estimates or TDOA estimates, it is impossible almost to become.In addition, the accurate synchronization between TOA or TDOA informational needs transmitter and receiver, this is also difficult to accomplish in many application scenarios.
In addition, under the condition that can not determine AP ownership floor, carry out AP location, precision and the accuracy of location can be reduced undoubtedly, thus affect planning and the optimal design of wlan network.
Summary of the invention
For solving the technical problem of existing existence, the embodiment of the present invention provides a kind of Site Survey method and apparatus.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of Site Survey method, described method comprises:
Receive the test signal that AP sends;
Obtain the received signal strength indicator RSSI of each described test signal;
Utilize the rule of the correlation in data digging method and each described test signal, extract the AP belonging to test zone;
The RSSI corresponding according to the AP respectively belonging to test zone, determines the coordinate of the AP respectively belonging to test zone.
Preferably, described utilize the correlation in data digging method rule and each described test signal, extracting the AP belonging to test zone is:
Utilize the Apriori algorithm in correlation rule and each described test signal, extract the AP belonging to test zone.
Preferably, describedly utilize the Apriori algorithm in correlation rule and each described test signal, extracting the AP belonging to test zone is:
Using each described test signal that receives as an item, every counting that carries out to be gone forward side by side row iteration computing, until when the numerous Item Sets of the candidate obtained is less than or equal to default minimum support, termination of iterations algorithm, obtains Output rusults;
On Output rusults, the numerous Item Sets of the candidate of single order is the set of the AP belonging to test zone.
Preferably, described basis respectively belongs to RSSI corresponding to the AP of test zone, determines that the coordinate of the AP respectively belonging to test zone is:
The RSSI corresponding according to the AP respectively belonging to test zone, determines respectively to belong to the AP of test zone and the distance of preset reference point;
With the coordinate of described reference point for reference value, calculate the coordinate of the AP respectively belonging to test zone according to described distance.
Preferably, described basis respectively belongs to RSSI corresponding to the AP of test zone, determines that the distance of the AP and preset reference point respectively belonging to test zone is:
The RSSI corresponding according to the AP respectively belonging to test zone searches the corresponding relation of the distance of default RSSI and preset reference point, determines respectively to belong to the AP of test zone and the distance of preset reference point.
The invention provides a kind of Site Survey device, described device comprises:
Receiving element, for receiving the test signal that AP sends;
Acquiring unit, for obtaining the received signal strength indicator RSSI of each described test signal;
Extraction unit, for utilizing the rule of the correlation in data digging method and each described test signal, extracts the AP belonging to test zone;
Determining unit, for the RSSI corresponding according to the AP respectively belonging to test zone, determines the coordinate of the AP respectively belonging to test zone.
Preferably, described extraction unit, for utilizing the Apriori algorithm in correlation rule and each described test signal, extracts the AP belonging to test zone.
Preferably, described extraction unit, for each described test signal that will receive as an item, every counting that carries out is gone forward side by side row iteration computing, until when the numerous Item Sets of the candidate obtained is less than or equal to default minimum support, termination of iterations algorithm, obtains Output rusults;
On Output rusults, the numerous Item Sets of the candidate of single order is the set of the AP belonging to test zone.
Preferably, described determining unit, for the RSSI corresponding according to the AP respectively belonging to test zone, determines respectively to belong to the AP of test zone and the distance of preset reference point;
With the coordinate of described reference point for reference value, calculate the coordinate of the AP respectively belonging to test zone according to described distance.
Preferably, described determining unit, for the corresponding relation that the RSSI corresponding according to the AP respectively belonging to test zone searches the distance of default RSSI and preset reference point, determines respectively to belong to the AP of test zone and the distance of preset reference point.
As from the foregoing, technical scheme of the present invention comprises: receive the test signal that AP sends; Obtain the received signal strength indicator RSSI of each described test signal; Utilize the rule of the correlation in data digging method and each described test signal, extract the AP belonging to test zone; The RSSI corresponding according to the AP respectively belonging to test zone, determines the coordinate of the AP respectively belonging to test zone.Thus, utilize the rule of the correlation in data digging method and each described test signal, extract the AP belonging to test zone; And then the RSSI corresponding according to the AP respectively belonging to test zone, determine the coordinate of the AP respectively belonging to test zone, can accurately position AP.
Accompanying drawing explanation
Fig. 1 is the realization flow figure of the first embodiment of a kind of Site Survey method provided by the invention;
Fig. 2 is the realization flow figure of the second embodiment of a kind of Site Survey method provided by the invention;
Fig. 3 is the realization flow figure of the 3rd embodiment of a kind of Site Survey method provided by the invention;
The schematic flow sheet of the interative computation that Fig. 4 provides for the embodiment of the present invention;
The schematic diagram of the locating area that Fig. 5 provides for the embodiment of the present invention;
Fig. 6 is the structural representation of the embodiment of a kind of Site Survey device provided by the invention.
Embodiment
First embodiment of a kind of Site Survey method provided by the invention, as shown in Figure 1, described method comprises:
The test signal that step 101, reception AP send.
Here, in actual applications, head end test instrument can be used to test along a test trails at a certain floor of building, the test signal that the AP that the test signal that the AP received sends not only comprises This floor sends, also likely comprise the test signal that AP or downstairs sends upstairs.
Step 102, obtain the received signal strength indicator (Received Signal Strength Indication, RSSI) of each described test signal.
Step 103, utilize the correlation in data digging method rule and each described test signal, extract the AP belonging to test zone.
Here, described utilize the correlation in data digging method rule and each described test signal, extracting the AP belonging to test zone can be:
Utilize the Apriori algorithm in correlation rule and each described test signal, extract the AP belonging to test zone.
Preferably, describedly utilize the Apriori algorithm in correlation rule and each described test signal, extracting the AP belonging to test zone can be:
Using each described test signal that receives as an item, every counting that carries out to be gone forward side by side row iteration computing, until when the numerous Item Sets of the candidate obtained is less than or equal to default minimum support, termination of iterations algorithm, obtains Output rusults;
On Output rusults, the numerous Item Sets of the candidate of single order is the set of the AP belonging to test zone.
Step 104, the RSSI corresponding according to the AP respectively belonging to test zone, determine the coordinate of the AP respectively belonging to test zone.
Here, described basis respectively belongs to RSSI corresponding to the AP of test zone, determines that the coordinate of the AP respectively belonging to test zone is:
The RSSI corresponding according to the AP respectively belonging to test zone, determines respectively to belong to the AP of test zone and the distance of preset reference point;
With the coordinate of described reference point for reference value, calculate the coordinate of the AP respectively belonging to test zone according to described distance.
Preferably, described basis respectively belongs to RSSI corresponding to the AP of test zone, determines that the distance of the AP and preset reference point respectively belonging to test zone is:
The RSSI corresponding according to the AP respectively belonging to test zone searches the corresponding relation of the distance of default RSSI and preset reference point, determines respectively to belong to the AP of test zone and the distance of preset reference point.
Thus, first the present embodiment utilizes the rule of the correlation in data digging method and each described test signal, extracts the AP belonging to test zone; RSSI corresponding according to the AP respectively belonging to test zone again, determines the coordinate of the AP respectively belonging to test zone, can accurately position AP.
Second embodiment of a kind of Site Survey method provided by the invention, as shown in Figure 2, described method comprises:
The test signal that step 201, reception AP send.
Step 202, obtain the received signal strength indicator RSSI of each described test signal.
Step 203, utilize the Apriori algorithm in correlation rule and each described test signal, extract the AP belonging to test zone.
Here, describedly utilize the Apriori algorithm in correlation rule and each described test signal, extracting the AP belonging to test zone can be:
Using each described test signal that receives as an item, every counting that carries out to be gone forward side by side row iteration computing, until when the numerous Item Sets of the candidate obtained is less than or equal to default minimum support, termination of iterations algorithm, obtains Output rusults;
On Output rusults, the numerous Item Sets of the candidate of single order is the set of the AP belonging to test zone.
Step 204, the RSSI corresponding according to the AP respectively belonging to test zone, determine the coordinate of the AP respectively belonging to test zone.
Here, described basis respectively belongs to RSSI corresponding to the AP of test zone, determines that the coordinate of the AP respectively belonging to test zone is:
The RSSI corresponding according to the AP respectively belonging to test zone, determines respectively to belong to the AP of test zone and the distance of preset reference point;
With the coordinate of described reference point for reference value, calculate the coordinate of the AP respectively belonging to test zone according to described distance.
Preferably, described basis respectively belongs to RSSI corresponding to the AP of test zone, determines that the distance of the AP and preset reference point respectively belonging to test zone is:
The RSSI corresponding according to the AP respectively belonging to test zone searches the corresponding relation of the distance of default RSSI and preset reference point, determines respectively to belong to the AP of test zone and the distance of preset reference point.
Thus, the present embodiment utilizes the Apriori algorithm in correlation rule and each described test signal, can extract the AP belonging to test zone more accurately, and then is conducive to accurately positioning AP.
3rd embodiment of a kind of Site Survey method provided by the invention, as shown in Figure 3, described method comprises:
The test signal that step 301, reception AP send.
Step 302, obtain the received signal strength indicator RSSI of each described test signal.
Step 303, utilize the Apriori algorithm in correlation rule and each described test signal, extract the AP belonging to test zone.
Here, describedly utilize the Apriori algorithm in correlation rule and each described test signal, extracting the AP belonging to test zone can be:
Using each described test signal that receives as an item, every counting that carries out is gone forward side by side row iteration computing, shown in Figure 4, until when the numerous Item Sets of the candidate obtained is less than or equal to default minimum support, termination of iterations algorithm, obtains Output rusults;
On Output rusults, the numerous Item Sets of the candidate of single order is the set of the AP belonging to test zone.
Here, the numerous Item Sets of shown candidate is a subset of Candidate itemsets, shows as the individuality that candidate items concentrates occurrence number more in the algorithm.
Step 304, the RSSI corresponding according to the AP respectively belonging to test zone, determine respectively to belong to the AP of test zone and the distance of preset reference point.
Step 305, with the coordinate of described reference point for reference value, calculate the coordinate of the AP respectively belonging to test zone according to described distance.
Here, described basis respectively belongs to RSSI corresponding to the AP of test zone, determines that the distance of the AP and preset reference point respectively belonging to test zone is:
The RSSI corresponding according to the AP respectively belonging to test zone searches the corresponding relation of the distance of default RSSI and preset reference point, determines respectively to belong to the AP of test zone and the distance of preset reference point.
Concrete, the corresponding relation of the distance of RSSI and preset reference point can adopt following methods to obtain.
Divide locating area with step-length m, as shown in Figure 5, described locating area can be simple, clog-free square, and the numerical value of described step-length m suitably can adjust according to test data (i.e. test signal), and m gets 2-4 rice usually.
Arrange beaconing nodes (i.e. reference point) M1, M2, M3 and M4 respectively at 4 angles of described locating area, the coordinate of each beaconing nodes is respectively (x1, y1), (x2, y2), (x3, y3), (x4, y4).Then point of intersection position coordinates and and each distance between beaconing nodes M1, M2, M3, M4 known.
Relation between RSSI and distance, comprises three key elements: position coordinates, signal strength signal intensity average, signal strength signal intensity standard deviation.Be introduced for the position and signal strength characteristics relation (i.e. the corresponding relation of the distance of RSSI and preset reference point) of setting up some A1 below.
A1 position coordinates is (x1+m, y1+m), converts the distance of A1 a to M1, M2, M3, M4 point to signal strength signal intensity average p1, p2, p3, p4 respectively.Signal strength signal intensity standard deviation by
solve, wherein P represents signal strength measurement, and E () represents average.Therefore the corresponding relation between the position coordinates of an A1 and each beaconing nodes signal strength characteristics can be set up:
Can obtain the corresponding relation between the position coordinates of other intersection point and signal strength characteristics by identical method, its form is:
Thus, the RSSI that the present embodiment is first corresponding according to the AP respectively belonging to test zone, determines respectively to belong to the AP of test zone and the distance of preset reference point; Again with the coordinate of described reference point for reference value, calculate the coordinate of the AP respectively belonging to test zone according to described distance, can be conducive to accurately positioning AP.
A kind of Site Survey device provided by the invention, as shown in Figure 6, described device comprises:
Receiving element 601, for receiving the test signal that AP sends;
Acquiring unit 602, for obtaining the received signal strength indicator RSSI of each described test signal;
Extraction unit 603, for utilizing the rule of the correlation in data digging method and each described test signal, extracts the AP belonging to test zone;
Determining unit 604, for the RSSI corresponding according to the AP respectively belonging to test zone, determines the coordinate of the AP respectively belonging to test zone.
Thus, first the present embodiment utilizes the rule of the correlation in data digging method and each described test signal, extracts the AP belonging to test zone; RSSI corresponding according to the AP respectively belonging to test zone again, determines the coordinate of the AP respectively belonging to test zone, can accurately position AP.
In one embodiment, described extraction unit 603, for utilizing the Apriori algorithm in correlation rule and each described test signal, extracts the AP belonging to test zone.
In one embodiment, described extraction unit 603, for each described test signal that will receive as an item, every counting that carries out is gone forward side by side row iteration computing, until when the numerous Item Sets of the candidate obtained is less than or equal to default minimum support, termination of iterations algorithm, obtains Output rusults;
On Output rusults, the numerous Item Sets of the candidate of single order is the set of the AP belonging to test zone.
In one embodiment, described determining unit 604, for the RSSI corresponding according to the AP respectively belonging to test zone, determines respectively to belong to the AP of test zone and the distance of preset reference point;
With the coordinate of described reference point for reference value, calculate the coordinate of the AP respectively belonging to test zone according to described distance.
In one embodiment, described determining unit 604, for the corresponding relation that the RSSI corresponding according to the AP respectively belonging to test zone searches the distance of default RSSI and preset reference point, determines respectively to belong to the AP of test zone and the distance of preset reference point.
In sum, the present invention is as the support technology in early stage of WLAN intelligent planning and optimization system, use the data mining based on correlation rule, the AP belonging to test floor can be judged accurately, then use the indoor positioning technologies based on RSSI accurately to orient the position of test floor AP.The present invention can realize on WLAN intelligent planning and optimization system.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of hardware embodiment, software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (10)
1. a Site Survey method, is characterized in that, described method comprises:
Receive the test signal that AP sends;
Obtain the received signal strength indicator RSSI of each described test signal;
Utilize the rule of the correlation in data digging method and each described test signal, extract the AP belonging to test zone;
The RSSI corresponding according to the AP respectively belonging to test zone, determines the coordinate of the AP respectively belonging to test zone.
2. method according to claim 1, is characterized in that, described utilize the correlation in data digging method rule and each described test signal, extracting the AP belonging to test zone is:
Utilize the Apriori algorithm in correlation rule and each described test signal, extract the AP belonging to test zone.
3. method according to claim 2, is characterized in that, describedly utilizes the Apriori algorithm in correlation rule and each described test signal, and extracting the AP belonging to test zone is:
Using each described test signal that receives as an item, every counting that carries out to be gone forward side by side row iteration computing, until when the numerous Item Sets of the candidate obtained is less than or equal to default minimum support, termination of iterations algorithm, obtains Output rusults;
On Output rusults, the numerous Item Sets of the candidate of single order is the set of the AP belonging to test zone.
4. method according to claim 1, is characterized in that, described basis respectively belongs to RSSI corresponding to the AP of test zone, determines that the coordinate of the AP respectively belonging to test zone is:
The RSSI corresponding according to the AP respectively belonging to test zone, determines respectively to belong to the AP of test zone and the distance of preset reference point;
With the coordinate of described reference point for reference value, calculate the coordinate of the AP respectively belonging to test zone according to described distance.
5. method according to claim 4, is characterized in that, described basis respectively belongs to RSSI corresponding to the AP of test zone, determines that the distance of the AP and preset reference point respectively belonging to test zone is:
The RSSI corresponding according to the AP respectively belonging to test zone searches the corresponding relation of the distance of default RSSI and preset reference point, determines respectively to belong to the AP of test zone and the distance of preset reference point.
6. a Site Survey device, is characterized in that, described device comprises:
Receiving element, for receiving the test signal that AP sends;
Acquiring unit, for obtaining the received signal strength indicator RSSI of each described test signal;
Extraction unit, for utilizing the rule of the correlation in data digging method and each described test signal, extracts the AP belonging to test zone;
Determining unit, for the RSSI corresponding according to the AP respectively belonging to test zone, determines the coordinate of the AP respectively belonging to test zone.
7. device according to claim 6, is characterized in that, described extraction unit, for utilizing the Apriori algorithm in correlation rule and each described test signal, extracts the AP belonging to test zone.
8. device according to claim 7, it is characterized in that, described extraction unit, for each described test signal that will receive as an item, every counting that carries out is gone forward side by side row iteration computing, until when the numerous Item Sets of the candidate obtained is less than or equal to default minimum support, termination of iterations algorithm, obtains Output rusults;
On Output rusults, the numerous Item Sets of the candidate of single order is the set of the AP belonging to test zone.
9. device according to claim 6, is characterized in that, described determining unit, for the RSSI corresponding according to the AP respectively belonging to test zone, determines respectively to belong to the AP of test zone and the distance of preset reference point;
With the coordinate of described reference point for reference value, calculate the coordinate of the AP respectively belonging to test zone according to described distance.
10. device according to claim 9, it is characterized in that, described determining unit, for the corresponding relation that the RSSI corresponding according to the AP respectively belonging to test zone searches the distance of default RSSI and preset reference point, determines respectively to belong to the AP of test zone and the distance of preset reference point.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102791025A (en) * | 2011-05-20 | 2012-11-21 | 盛乐信息技术（上海）有限公司 | Wireless fidelity (WIFI) based layered positioning system and implementing method |
| CN103384358A (en) * | 2013-06-25 | 2013-11-06 | 云南大学 | Indoor positioning method based on virtual reality and WIFI space field strength |
| CN103476109A (en) * | 2013-08-16 | 2013-12-25 | 武汉飞沃网络有限公司 | Indoor AP positioning method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102791025A (en) * | 2011-05-20 | 2012-11-21 | 盛乐信息技术（上海）有限公司 | Wireless fidelity (WIFI) based layered positioning system and implementing method |
| CN103384358A (en) * | 2013-06-25 | 2013-11-06 | 云南大学 | Indoor positioning method based on virtual reality and WIFI space field strength |
| CN103476109A (en) * | 2013-08-16 | 2013-12-25 | 武汉飞沃网络有限公司 | Indoor AP positioning method |
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