CN100426757C - System for measuring signal strength and density of parallel wireless network bridging point - Google Patents
System for measuring signal strength and density of parallel wireless network bridging point Download PDFInfo
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- CN100426757C CN100426757C CNB2004100623808A CN200410062380A CN100426757C CN 100426757 C CN100426757 C CN 100426757C CN B2004100623808 A CNB2004100623808 A CN B2004100623808A CN 200410062380 A CN200410062380 A CN 200410062380A CN 100426757 C CN100426757 C CN 100426757C
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Abstract
The present invention relates to a system for measuring the signal strength and density of parallel wireless network bridging points, which comprises one service unit and a plurality of client end units. The present invention can be used for measuring the strength and density distribution situation of electrical waves sent by all bridging points in a wireless local area network position service system so as to get a signal strength and density profile of bridging points to serves as locating reference data on the occasion of actual application of the wireless local area network position service system. The present invention is characterized in that during actual measurement, a plurality of measurement workers can simultaneously carry out signal intensity and density measurement of bridging points respectively at different measurement positions in a regional and parallel mode, and thus, the building work of the wireless local area network position service system is more fast and effective, by which the listing time and the listing cost of the wireless local area network position service system are reduced.
Description
Technical field
The invention relates to a kind of wireless network communication technique, particularly about a kind of system for measuring signal strength and density of parallel wireless network bridging point, be used to measure WLAN (wireless local area network) location-based service (WLAN Location Based Service, WLAN LBS) all bridge contact (Access Point in the system, AP) send the intensity density distribution situation of electric wave signal, draw bridge contact signal strength signal intensity density profile (fingerprint, FP), specifically implement the position reference data of time institute's foundation as this WLAN (wireless local area network) position service system.
Prior art
WLAN (wireless local area network) location-based service (WLAN Location Based Service, WLAN LBS) j is the research topic of a hot topic in the present wireless communication technology field, it can pass through WLAN (wireless local area network) (Wireless Local Area Network, WLAN) technology, determine the geographical position of specific objective object in WLAN (wireless local area network), wherein this destination object can for example be a people, an automobile etc.As long as these destination objects carry the wireless signal receiving system, the WLAN (wireless local area network) position service system can detect the geographical position at this destination object place.
The normal at present geographical position location technology that adopts for example comprises pattern matching algorithm, TDOA/TOA/AOA algorithm (wherein TDOA is that Time Difference OfArrival, TOA are that Time OfArrival, AOA are Angle OfArrival), experience curve match algorithm etc.; Wherein pattern matching algorithm is present this area geographic position locating method of normal employing.
Pattern matching algorithm is based on all bridge contact (Access Point in the wireless local area network (WLAN) system that the WLAN (wireless local area network) location-based service adopted, AP) send the intensity density distribution situation of radio wave signal, draw the coordinate position of specific objective object in the specific region.Therefore in the time of will setting up new WLAN (wireless local area network) position service system, at first the initialization that will do is to measure in this WLAN (wireless local area network) position service system, all bridge contacts send the intensity density distribution situation of radio wave signal, set up bridge contact signal strength signal intensity density profile (fingerprint whereby, FP), as this WLAN (wireless local area network) position service system position reference data of institute's foundation in the specific implementation.
A kind of bridge contact measuring signal strength and density method commonly used at present is with relevant Survey Software program, be installed in portable and have on the electronic information aid of wireless communication ability, personal digital assistant (Personal Digital Assistant for example, PDA), notebook computer, Tablet PC (tablet PC) etc., and on each tested point, measure by survey crew, automatically deposit survey data in local data base by network system again, thus signal strength signal intensity to obtain with access all be to carry out in this locality.The shortcoming of this metering system is that surveying work can only be undertaken by a survey crew usually; Even under a micro radio LAN environment, the workload of survey crew is also quite big.Also can many people measure concurrently simultaneously under certain this mode, yet because all there is local database in measurement data, therefore in the development process of WLAN (wireless local area network) position service system, just can face the work of integral data, if these data integration work can increase many workloads by manually finishing.Yet if carry out this data integration work by computer program, it is very poor that the extensibility of system will become, because the preliminary treatment of some data is being done at some special circumstances by system.
Summary of the invention
For overcoming the shortcoming of above-mentioned prior art, main purpose of the present invention is to provide a kind of system for measuring signal strength and density of parallel wireless network bridging point, the available parallelism mode is carried out the work of bridge contact measuring signal strength and density simultaneously by the multiple-position measurement personnel, make the WLAN (wireless local area network) position service system to build the work of putting quicker and effective, so as to the Time To Market (Time to Market) that reduces the WLAN (wireless local area network) position service system and the cost (Cost to Market) that goes on the market.
For reaching above-mentioned and other purpose, system for measuring signal strength and density of parallel wireless network bridging point of the present invention is to be used to measure WLAN (wireless local area network) location-based service (WLAN Location BasedService, WLAN LBS) all bridge contacts (the Access Point in the system, AP) the intensity density distribution situation of the electric wave signal that is sent, (fingerprint FP) specifically implements the position reference data of time institute's foundation as this WLAN (wireless local area network) position service system to try to achieve bridge contact signal strength signal intensity density profile whereby.
System for measuring signal strength and density of parallel wireless network bridging point of the present invention comprises a service unit and a plurality of client unit at least; Wherein, this service unit is connected to wireless local area network (WLAN) system, and the equal available wireless mode of each client unit is connected to this service unit by this wireless local area network (WLAN) system; And the internal structure of this service unit comprises at least: network connecting module, this service unit can be connected to this wireless local area network (WLAN) system, and allow each client unit be connected to this service unit by this wireless local area network (WLAN) system; Measure the engineering module of putting on record, the data input module that the person of being to use controls, the relevant information and relevant coordinate parameters in the geographical position at all bridge contact places that are used to import this WLAN (wireless local area network) position service system and comprised, and the network address information under each bridge contact; Signal strength information remittance mould preparation piece can receive the detected one group of bridge contact signal strength values of each client unit, and the bridge contact signal strength values remittance that all client unit send is made into bridge contact signal strength signal intensity density profile; And database module, store this signal strength information and converge mould preparation piece and converge and put in order the bridge contact signal strength signal intensity density map that forms; And wherein the internal structure of each client unit comprises at least: wireless network interface modules, allow and set up the radio communication pipeline between this client unit and this wireless local area network (WLAN) system, and also can receive the electric wave signal that each bridge contact sent that this WLAN (wireless local area network) position service system is comprised; The geography information input module can respond specific user and control incident, imports the relevant information that the geographical position in place is measured at this client unit place, obtains to measure the coordinate position in place whereby; Bridge contact signal strength detection module can detect the intensity of the received electric wave signal that each bridge contact sends of this wireless network interface modules; And transmission module on the bridge contact signal strength information, can be with the detected one group of bridge contact signal strength values of this bridge contact signal strength detection module, be uploaded to wireless signal strength information uploading module in this service unit by this wireless local area network (WLAN) system.
In sum, the characteristics of system for measuring signal strength and density of parallel wireless network bridging point of the present invention are, actual when carrying out surveying work, can allow the multiple-position measurement personnel carry out the surveying work of bridge contact signal strength signal intensity density respectively simultaneously with parallel mode in different measurement places, make the WLAN (wireless local area network) position service system to build the work of putting quicker and efficient, reduce the Time To Market and the listing cost of WLAN (wireless local area network) position service system whereby.
Description of drawings
Fig. 1 is the application structure schematic diagram of system for measuring signal strength and density of parallel wireless network bridging point of the present invention;
Fig. 2 A is the internal structure schematic diagram of service unit in the system for measuring signal strength and density of parallel wireless network bridging point of the present invention;
Fig. 2 B is the internal structure schematic diagram of each client unit in the system for measuring signal strength and density of parallel wireless network bridging point of the present invention.
Embodiment
Embodiment
Below be conjunction with figs., describe the embodiment of system for measuring signal strength and density of parallel wireless network bridging point of the present invention in detail.
Fig. 1 is the application structure of system for measuring signal strength and density of parallel wireless network bridging point of the present invention.As shown in the figure, system for measuring signal strength and density of parallel wireless network bridging point of the present invention structurally is divided into the system unit of two dispersions: service unit 100 and client unit 200; Wherein this service unit 100 carries to one or more server (only showing a station server 10 among Fig. 1 typically), and this server 10 is connected to wireless local area network (WLAN) system (Wireless Local Area Network, WLAN) 30; 200 lift-launchs of this client unit are to portable and have an electronic information aid 20 of wireless communication ability, personal digital assistant (Personal Digital Assistant for example, PDA), notebook computer, Tablet PC (tabletPC) etc., these electronic information aid 20 available wireless modes are connected to service unit 100 by this wireless local area network (WLAN) system 30.
In the practical application, system for measuring signal strength and density of parallel wireless network bridging point of the present invention can be used to measuring position positioning service (Location Based Service, LBS) all bridge contacts 41 in the system 40 (with AP#1, AP#2 ..., AP#N represents) send the intensity density distribution situation of electric wave signal, draw bridge contact signal strength signal intensity density profile whereby, as these WLAN (wireless local area network) position service system 40 concrete position reference data of implementing time institute's foundation.
Shown in Fig. 2 A, the internal structure of the service unit 100 in the system for measuring signal strength and density of parallel wireless network bridging point of the present invention comprises at least: (A0) network connecting module 101; (A1) measure the engineering module 110 of putting on record; (A2) signal strength information remittance mould preparation piece 120; And (A3) database module 130.
Measure the engineering data input module that module 110 persons of being to use control of putting on record, can allow relevant engineering staff for example by network workstation 50, import this WLAN (wireless local area network) position service system 40 and comprise the relevant information (for example map file of BMP or jpeg format) and relevant coordinate parameters (for example comprising classification and the engineer's scale of measuring coordinate system that engineering adopts) of all bridge contacts 41 geographic locations and the network address information (for example MAC of each bridge contact 41 (Media Access Control) address value) under each bridge contact 41.
Signal strength information remittance mould preparation piece 120 can pass through this wireless local area network (WLAN) system 30, receive the bridge contact signal strength values that each client unit 200 detected each bridge contacts 41 send, and the signal strength values remittance of all bridge contacts 41 is made into bridge contact signal strength signal intensity density profile.For example, signal strength information converges mould preparation piece 120 can be with its received all bridge contact signal strength values, and remittance is made into following data format:
[ID，x，y，RSSI(1)，RSSI(2)，……，RSSI(N)，ClientID]
Wherein
The numbering of this measurement data of ID=;
(x, y)=coordinate figure in the measurement place of this measurement data
RSSI (i), i=1,2 ..., N is the measured value of i the AP signal strength signal intensity that bridge contact sent;
The identification code name of ClientID=client unit 200
Then shown in Fig. 2 B, the internal structure of each client unit 200 comprises at least in the system for measuring signal strength and density of parallel wireless network bridging point of the present invention: (B1) wireless network interface modules 210; (B2) the geography information input module 220; (B3) bridge contact signal strength detection module 230; And (B4) transmission module 240 on the bridge contact signal strength information.The best embodiment of this client unit 200 is thin type client unit (thin client).
Wireless network interface modules 210 is based on the IEEE 802.11x radio communication standard of standard; And best execution mode is to adopt NDIS (Network Driver Interface Specification) NetWare Driver Interface Specification to make wireless network interface card (Network Interface Card, NIC), allow and set up the radio communication pipeline between client unit 200 and the wireless local area network (WLAN) system 30, also can be used for receiving the electric wave signal that each bridge contact 41 that WLAN (wireless local area network) position service system 40 yet to be built comprised sends.
Geography information input module 220 can respond specific user and control incident 221, the input measurement point geographical position, user place relevant information, obtain whereby measurement point coordinate position (x, y).On concrete the enforcement, the user controls incident 221 for example can the person of being to use control the coordinate values that the keyboard equipment input on the electronic information aid 20 is correlated with, or utilizes pointing device (pointing device) to click the ad-hoc location on the shown electronic chart on the electronic information aid 20 (being the position of measurement point on this electronic chart) etc.In addition, (x y) can change according to the specified coordinate system of different engineering disciplines the coordinate position of user's input; Just geography information input module 220 and then comprise coordinate transformation function can become another kind of coordinate system with a kind of origin coordinate system transform.But also can for example changing by remote server 10, this coordinate transformation function provides.
Bridge contact signal strength detection module 230 is coupled to above-mentioned wireless network interface modules 210, be used to detect the intensity that these wireless network interface modules 210 each received bridge contacts 41 send electric wave signal, and with detected bridge contact signal strength values (Received Signal StrengthIndication, RSSI) be recorded to one group of default parameters R SSI (i), i=1,2 ..., N; Just the bridge contact signal strength values that No. 1 bridge contact (#1) sent is recorded to RSSI (1), and the bridge contact signal strength values that No. 2 bridge contact (#2) sent is recorded to RSSI (2), and the rest may be inferred.On concrete the enforcement, if wireless network interface modules 210 is the wireless network interface card of NDIS, then wireless signal strength detection module 230 is NDISUIO (NDISUser Mode I/O Protocol) the data output/input interfaces that for example adopt in the NDIS standard, reads out required bridge contact signal strength values from this NDIS wireless network interface card.
Please consult Fig. 1, Fig. 2 A and Fig. 2 B simultaneously, in practical application, when the position location services dealer wants to set up new WLAN (wireless local area network) position service system 40, the engineering staff can at first for example be connected to service unit 100 by network workstation 50, use wherein the measurement engineering module 110 of putting on record, import this WLAN (wireless local area network) position service system 40 yet to be built and comprise the relevant information and relevant coordinate parameters of all bridge contacts 41 geographic locations and the network address information under each bridge contact 41.
The characteristics of system for measuring signal strength and density of parallel wireless network bridging point of the present invention are, actual when carrying out surveying work, can allow the multiple-position measurement personnel hold respectively and arrive different measurement places, carry out the surveying work of bridge contact signal strength signal intensity density simultaneously with subregion, parallel mode with the electronic information aid 20 that carries client unit 200.Below promptly its process of measurement is described at a surveying work that survey crew carried out.
At first utilize geography information input module 220 in the client unit 200 by survey crew, the input user measures at the place relevant information in the geographical position in place, obtain whereby measurement point coordinate position (x, y).On concrete the enforcement, (x y) can formulate according to any coordinate system this coordinate position, so geography information input module 220 can allow the user arbitrarily its origin coordinate system transform of importing be become its actual needed coordinate system.Then can activate NDIS wireless network interface modules 210, receive the electric wave signal that each bridge contact 41 sends that WLAN (wireless local area network) position service system 40 comprises yet to be built.Meanwhile, bridge contact signal strength detection module 230 promptly can detect the intensity of each received bridge contact 41 electric wave signal that sends of this wireless network interface modules 210 automatically, and detected bridge contact signal strength values is recorded to one group of default parameters R SSI (i), i=1,2,, N.Follow the strength information [ID of one group of electric wave signal that transmission module 240 promptly can be tried to achieve bridge contact signal strength detection module 230 on the bridge contact signal strength information, x, y, RSSI (1), RSSI (2), RSSI (N), ClientID], be uploaded to signal strength information in the service unit 100 by wireless local area network (WLAN) system 30 and converge mould preparation piece 120, data by this signal strength information remittance mould preparation piece 120 is come itself and other client unit 200 parallel conveys produce bridge contact signal strength signal intensity density profile through converging with putting in order, and this bridge contact signal strength signal intensity density profile are stored into database module 130.
When WLAN (wireless local area network) position service system 40 concrete enforcements, can extract bridge contact signal strength signal intensity density profile in the future, it is carried out the reference of positioning function time institute foundation as this WLAN (wireless local area network) position service system 40 from above-mentioned database module 130.
Claims (8)
1. system for measuring signal strength and density of parallel wireless network bridging point, be applied in the intensity density distribution situation of measuring electric wave signal that all bridge contacts send in the WLAN (wireless local area network) position service system, it is characterized in that this system for measuring signal strength and density of parallel wireless network bridging point comprises a service unit and a plurality of client unit at least; Wherein,
This service unit is connected to wireless local area network (WLAN) system, and the equal available wireless mode of each client unit is connected to this service unit by this wireless local area network (WLAN) system; And the internal structure of this service unit comprises at least:
Network connecting module can be connected to this service unit this wireless local area network (WLAN) system, allows each client unit be connected to this service unit by this wireless local area network (WLAN) system;
Measure the engineering module of putting on record, the data input module that the person of being to use controls, the relevant information and relevant coordinate parameters in the geographical position at all bridge contact places that are used to import this WLAN (wireless local area network) position service system and comprised, and the network address information under each bridge contact;
Signal strength information remittance mould preparation piece can receive the detected one group of bridge contact signal strength values of each client unit, and the bridge contact signal strength values remittance that all client unit send is made into bridge contact signal strength signal intensity density profile; And
Database module stores this signal strength information and converges mould preparation piece and converge and put in order the bridge contact signal strength signal intensity density map that forms;
And wherein
The internal structure of each client unit comprises at least:
Wireless network interface modules allows and sets up the radio communication pipeline between this client unit and this wireless local area network (WLAN) system, and also can receive the electric wave signal that each bridge contact sent that this WLAN (wireless local area network) position service system is comprised;
The geography information input module can respond specific user and control incident, imports the relevant information that the geographical position in place is measured at this client unit place, obtains to measure the coordinate position in place whereby;
Bridge contact signal strength detection module can detect the intensity of the received electric wave signal that each bridge contact sends of this wireless network interface modules; And
Transmission module on the bridge contact signal strength information can be with the detected one group of bridge contact signal strength values of this bridge contact signal strength detection module, is uploaded to wireless signal strength information uploading module in this service unit by this wireless local area network (WLAN) system.
2. system for measuring signal strength and density of parallel wireless network bridging point as claimed in claim 1 is characterized in that each client unit is carried to personal digital assistant.
3. system for measuring signal strength and density of parallel wireless network bridging point as claimed in claim 1 is characterized in that each client unit is carried to notebook computer.
4. system for measuring signal strength and density of parallel wireless network bridging point as claimed in claim 1 is characterized in that each client unit is carried to Tablet PC.
5. system for measuring signal strength and density of parallel wireless network bridging point as claimed in claim 1 is characterized in that, each client unit is thin type client unit.
6. system for measuring signal strength and density of parallel wireless network bridging point as claimed in claim 1 is characterized in that, the wireless network interface modules in each client unit is based on the IEEE 802.11x radio communication standard of standard.
7. system for measuring signal strength and density of parallel wireless network bridging point as claimed in claim 1 is characterized in that, the wireless network interface modules in each client unit is the network interface unit of NDIS standard criterion.
8. system for measuring signal strength and density of parallel wireless network bridging point as claimed in claim 1, it is characterized in that, geography information input module and then comprise coordinate transformation function in each client unit can become another kind of coordinate system with a kind of origin coordinate system transform.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100623808A CN100426757C (en) | 2004-07-09 | 2004-07-09 | System for measuring signal strength and density of parallel wireless network bridging point |
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| CNB2004100623808A CN100426757C (en) | 2004-07-09 | 2004-07-09 | System for measuring signal strength and density of parallel wireless network bridging point |
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| CN1719787A CN1719787A (en) | 2006-01-11 |
| CN100426757C true CN100426757C (en) | 2008-10-15 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1341311A (en) * | 1999-02-22 | 2002-03-20 | B·G·罗伯特 | Wireless communication network including plural migratory access nodes |
| WO2004014096A1 (en) * | 2002-07-31 | 2004-02-12 | Koninklijke Philips Electronics N.V. | System for locating a mobile unit |
| CN1499855A (en) * | 2002-10-31 | 2004-05-26 | �ͱ�»�ɷ�����˾ | Method of and device for providing information to mobile devices on basis of positional relation ship |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1341311A (en) * | 1999-02-22 | 2002-03-20 | B·G·罗伯特 | Wireless communication network including plural migratory access nodes |
| WO2004014096A1 (en) * | 2002-07-31 | 2004-02-12 | Koninklijke Philips Electronics N.V. | System for locating a mobile unit |
| CN1499855A (en) * | 2002-10-31 | 2004-05-26 | �ͱ�»�ɷ�����˾ | Method of and device for providing information to mobile devices on basis of positional relation ship |
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