CN101191835B - System and method for intelligent position finding using relevant signal intensity - Google Patents
System and method for intelligent position finding using relevant signal intensity Download PDFInfo
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- CN101191835B CN101191835B CN2006101571373A CN200610157137A CN101191835B CN 101191835 B CN101191835 B CN 101191835B CN 2006101571373 A CN2006101571373 A CN 2006101571373A CN 200610157137 A CN200610157137 A CN 200610157137A CN 101191835 B CN101191835 B CN 101191835B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/33—Services specially adapted for particular environments, situations or purposes for indoor environments, e.g. buildings
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/52—Network services specially adapted for the location of the user terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/024—Guidance services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/029—Location-based management or tracking services
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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 an intelligent indoor positioning system using related signal strength and a method thereof, comprising an IATo related signal strength acquiring proxy, an IATo related signal strength server, an IATo wireless positioning proxy, an IATo related signal strength matching proxy, an IATo free progressive proxy, and wireless access points for communication between the proxies and/ or the servers. The invention provides a perfect product and service to meet the requirements of indoor positioning and guiding. With an integrated intelligent related signal strength technology and the real-time indoor positioning, users can find the merchants more accurately and quickly.
Description
Technical field
The present invention relates to Communications and Information Systems, more particularly, relate to a kind of system and method that uses relative signal strength intelligence location.
Background technology
Along with the development of information system, need a lot of in real time, on the spot with up-to-date information, the location technology of a lot of types is arranged now, for example, global positioning system (GPS), mobile phone navigation system (MPS) and wireless location system (WPS).But the location technology of location-aware, real time information and the control system that still needs to provide indoor not only is used for safety and control aspect, also can be used for providing value added service to the user.
Present location technology, for example, GPS and MPS are to use the triangle location technology to calculate in real time based on the object position, and they provide a kind of feasible and effective outdoor location technology.Yet, indoor at different landform and obstacles restriction, above-mentioned GPS and MPS location technology can be received constraint, therefore can not use traditional GPS and MPS technology.
In building,, when people advance in this building, usually can get lost or can not find the destination as shopping center etc.At this moment, people can seek help from staff or map in the building.Yet the drawback of the information that the staff provides is to point out longer-distance place clearly; Simultaneously, the map in the building is to carry, and people often are difficult to own longer-distance destination be found in the memory of map.
The invention provides a kind of perfect products ﹠ services to satisfy the demand of indoor positioning and navigation.Integrated up-to-date intelligent relative signal strength technology is used for real-time indoor positioning, can provide more accurate and locatees more rapidly and navigate to the user.In addition, except navigation information, the present invention can also be about relevant informations such as food and drink, film, traffic in the user provides the shopping center.
Summary of the invention
At the defective that exists in the above-mentioned prior art, the invention provides a kind of use relative signal strength intelligence indoor locating system, described system comprises that the IATo relative signal strength obtains agency, IATo relative signal strength server, IATo wireless location agency, IATo relative signal strength coupling agency, IATo free walker agency and is used between above-mentioned a plurality of agency and/or the WAP (wireless access point) of the communication between the server; Described IATo relative signal strength server comprises: IATo relative signal strength information bank and artificial neural net;
Described IATo relative signal strength information bank storage relative signal strength value;
Described artificial neural net is as training of relative signal strength information intelligent and intelligent updating, described IATo relative signal strength obtains the agency and obtains the agency from relative signal strength and receive the relative signal strength value, and the matching result that carries relative signal strength coupling agency returns IATo free walker agency;
Described IATo relative signal strength obtains the agency and receives the relative signal strength value;
The relative signal strength value that described IATo relative signal strength coupling agency contrast IATo wireless location agency obtains and the relative signal strength value of described IATo relative signal strength server to be obtaining the definite address of mobile radio terminal, and the value of described exact address is returned to described IATo wireless location agency;
The value of the described exact address that the described IATo wireless location agency of described IATo free walker agency reception obtains.
In system of the present invention, described system further comprises the pairing function that starts according to the user, and the user acts on behalf of the IATo pairing agency of the friend's who checks the user with mobile radio terminal position by described IATo wireless location.
In system of the present invention, described system further comprises the indoor information server of the IATo body of facilities information in the locker room for the basis, and, from indoor information server, obtain the information acquisition agency of the IATo of information for the basis according to customer requirements.
In system of the present invention, described IATo relative signal strength server further comprises:
Control and manage described IATo wireless location agency and described IATo pairing agency's the agent communication and the registration center that move and verify.
In system of the present invention, described system further comprises using and has handled the IATo relative signal strength training agency that relative signal strength information is trained described artificial neural net in the described IATo relative signal strength information bank.
In system of the present invention, described IATo relative signal strength obtains to act on behalf of, described IATo free walker is acted on behalf of, the IATo wireless location is acted on behalf of, IATo relative signal strength coupling agency has autonomy highly, can enter different equipment, server, gateway and/or platform by wireless Internet, and can adapt to different network environments and different bandwidth.
According to another aspect of the present invention, provide a kind of use relative signal strength intelligence indoor orientation method, wherein, described method comprises:
The S1.IATo relative signal strength obtains the relative signal strength that the agency obtains the mobile radio terminal current location;
S2.IATo wireless location agency obtains the agency from described IATo relative signal strength and receives the relative signal strength value;
The relative signal strength value that S3.IATo relative signal strength coupling agency contrast IATo wireless location agency obtains and the relative signal strength value of IATo relative signal strength server are to obtain the definite address of mobile radio terminal;
S4.IATo free walker agency receives the return address value that IATo wireless location agency carries, wherein;
Described method further comprises relative signal strength data collection and the method that described IATo relative signal strength server is trained, and comprising:
A. indoor environment is divided into grid point, and obtains the relative signal strength information of each grid point of agency's collection for corresponding WAP (wireless access point) by described IATo relative signal strength;
B. described IATo relative signal strength obtains the agency and transmits relative signal strength information to described IATo wireless location agency;
C. described IATo wireless location agency carries relative signal strength information and enters described IATo relative signal strength server, and deposits relative signal strength information in described IATo relative signal strength server and carry out that data dump, data normalization are handled, data transaction;
The relative signal strength information that d.IATo training agency use has been handled is trained the artificial neural net in the described IATo relative signal strength server.
In method of the present invention, acted on behalf of the address information of carrying by the described IATo wireless location of paired device and enter user's mobile radio terminal, show the position of being matched the user on the display with the indoor free walker agency of this IATo the user by the pairing subscriber equipment.
The invention provides a kind of perfect products ﹠ services to satisfy the demand of indoor positioning and navigation.By integrated intelligent relative signal strength technology and real-time indoor positioning, can help the user more accurate, more promptly seek businessman.Application places of the present invention comprises, shopping center, exhibition center, hospital, government buildings, museum etc.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the module map of indoor locating system of the present invention;
Fig. 2 is the flow chart of the present invention to artificial neural network training in the IATo relative signal strength server;
Fig. 3 is the flow chart that the present invention positions mobile radio terminal according to relative signal strength;
Fig. 4 is the schematic diagram of the application of first embodiment of the invention;
Fig. 5 is the schematic diagram of the application of second embodiment of the invention;
Fig. 6 is the schematic diagram that mobile radio terminal of the present invention can be imitateed equipment.
Embodiment
Fig. 1 is the module map of indoor locating system of the present invention.Described system comprises that WAP (wireless access point), mobile radio terminal 102, relative signal strength server 108, IATo body are basic indoor information server 110 and IATo wireless location agency 105, be used for obtaining the agency and receive the relative signal strength value, and the matching result that carries relative signal strength coupling agency returns IATo free walker agency 103 from relative signal strength.Described mobile radio terminal 102 comprises the IATo free walker agency 103 of the return address value that reception IATo wireless location agency carries, the IATo relative signal strength of acquisition mobile radio terminal current location relative signal strength obtains agency 104, and acts on behalf of 114 with the IATo pairing of other mobile radio terminal pairing.Described IATo relative signal strength server 108 comprises the IATo relative signal strength database 109 of storage relative signal strength value and embeds the artificial neural net 112 of IATo relative signal strength; Relative signal strength coupling agency 106, the relative signal strength value that is used to contrast relative signal strength value that IATo wireless location agency obtains and relative signal strength server is to obtain the definite address of mobile radio terminal; And relative signal strength training agency 113, be used for training of human artificial neural networks 109.Described IATo body comprises database 111 and the information acquisition agency 107 of IATo body for the basis for the indoor information server on basis, and described information acquisition agency 107 obtains information according to customer requirements from indoor information server.
The indoor free walker agency 103 of IATo comprises that portable equipment (for example, palmtop PC, personal digital assistant, smart phone and/or portable computer) and indoor positioning equipment (can be and portable equipment equipment binding or that section is unloaded), for example, wireless receiver.Described receiver is used to receive the synchronous radio signal data of automatic subscriber location.Because be used for navigator, thus need be on the screen of portable equipment the display space data.Described system is with map in the display room, and while explicit user current location on indoor map.Except showing real-time indoor map, described equipment also can the site contour formula automatically show this place Useful Information to the user, and can provide visual figure and/or video information to the user in client.
IATo indoor free walker agency 103 provide three Core Features: 1) navigation; 2) tree-shaped information shows; 3) mutual fuzzy query.Navigation feature helps the user to find his/her current location, and by showing on indoor map how realtime graphic mark prompting user arrives the destination, for example, on indoor map, mark route map with red line, and with yellow square mark destination, described destination can be dining room, bookstore and continental embankment etc.By adopting body content modeling technique, the orderly information that provides is provided tree-shaped information, selects and find the facility/retail shop of his first-selection for the user.In addition, artificial intelligence technology, for example, fuzzy logic is used to support the intelligent search fuzzy institute of searching of price and distance (for example, based on) to can be used as the value-added service that the user seeks first-selected commodity/destination/facility.
The IATo relative signal strength obtains agency 104 and runs on client.The major function that relative signal strength obtains agency 104 is to collect current relative signal strength (for example, mobile client device is at the detected overall wireless mode of current location).Described relative signal strength pattern (the anthropoid fingerprint of class) is as the sign of inside plant ad-hoc location.
Before the relative signal strength server was used for indoor positioning, the relative signal strength value (indoor) of all collections was stored in relative signal strength server 108, data dump, quantification and data transaction.IATo relative signal strength training agency 113 is used for training the artificial neural net 112 of relative signal strength server 108, handles with the indoor positioning that is used for subsequently.
In up-to-date IATo invention, brand-new artificial neural net and training method have been adopted, for example, multilayer feedforward backward communication network, radially troop method, K of base (RBF) neural net, adaptive resonance theory (ART) neural net, K average closed on troop method and chaos of the method for trooping, self-organizing collection of illustrative plates (SOM) most and attracted the method for trooping (above-mentioned all artificial intelligence approaches and model embed IATo intelligent layer module).
IATo wireless location agency 105 is that core moves the indoor positioning agency, runs in the described intelligent indoor locating system.Major function comprises following two aspects:
1) communication is acted on behalf of to transmit positional information to the indoor free walker of the IATo in the mobile radio terminal equipment between relative signal strength server and mobile radio terminal;
2) under and/or the situation about stopping up crowded with the data flow between the different mobile radio terminal, closing on transmission of location information between the agency of location at the relative signal strength server of inside plant.
An important characteristic of the present invention is to use intelligent agent technology (Intelligent agenttechnology), and therefore, all intelligent agents have autonomy, mobility and the robustness of height.In other words, all intelligent agents can be by the different device/server/gateway/platform of wireless Internet environment (for example, 3G, 2.5G, 802.11 series etc.) discrepancy.
IATo relative signal strength server 108 is core technologies of the present invention, and major function comprises:
1) information bank of indoor locating system wherein comprises the information of all relative signal strength of inside plant;
2) neural net of embedding relative signal strength server is as training of relative signal strength information intelligent and renewal center;
3) agent communication and the registration center of control and managing I ATo indoor positioning agency and IATo pairing agency's mobile and checking.
IATo pairing agency 114 provides the pairing function.In other words, in specific mobile radio terminal, the user not only can see him in indoor current location, and after the pairing function, can see his/her friend's position in activated system.
Fig. 2 is the flow chart of the present invention to artificial neural network training in the relative signal strength server.Describe artificial neural network training in conjunction with Fig. 1, comprise the steps:
Fig. 3 is the flow chart that the present invention positions mobile radio terminal according to relative signal strength.In conjunction with the position fixing process of Fig. 1 description, comprise the steps: mobile radio terminal
Fig. 4 is the schematic diagram of the application of first embodiment of the invention.Fig. 4 has showed the plane graph in the shopping center of using described intelligent indoor locating system, is provided with a plurality of WAP (wireless access point) 401,402 and 403 at the mall, is used for communicating by letter between described each agency of intelligent indoor locating system and the server.At first, as follows the relative signal strength server is trained, indoor environment is divided into grid point, and obtain the relative signal strength information of each grid point of agency's collection for WAP (wireless access point) by the IATo relative signal strength; Subsequently, relative signal strength acquisition agency transmission relative signal strength information to IATo wireless location is acted on behalf of; Subsequently, IATo wireless location agency carries relative signal strength information and enters IATo relative signal strength server, and deposits relative signal strength information in the relative signal strength server and carry out that data dump, data normalization are handled, data transaction; At last, IATo training agency uses the artificial neural net in the relative signal strength information training relative signal strength server of having handled.At this moment, the relative signal strength information of each grid point has deposited in the relative signal strength information bank.
After the user carried mobile radio terminal 404 and enters the shopping center, user's destination was shop 2.
At first, agent communication in the relative signal strength server and registration center verify to the indoor positioning agency of mobile radio terminal with the user identity of definite this mobile radio terminal, and whether this user is allowed to use described intelligent indoor locating system.After definite this user can use described intelligent indoor locating system, use described intelligent indoor locating system that mobile radio terminal 404 is positioned; Subsequently, the IATo relative signal strength obtains the relative signal strength that the agency obtains the mobile radio terminal current location; Subsequently, IATo wireless location agency obtains the agency from relative signal strength and receives the relative signal strength value; Subsequently, the relative signal strength value of the relative signal strength value of IATo relative signal strength coupling agency contrast IATo wireless location agency acquisition and relative signal strength server is to obtain the definite address of mobile radio terminal; Subsequently, IATo free walker agency receives the return address value that IATo wireless location agency carries.
After mobile radio terminal that the user carries was positioned, mobile radio terminal 404 used the information acquisition agency in the indoor information server searching inside plant information of IATo body as the basis by WAP (wireless access point) 402.At last, the information acquisition agency carries inside plant information and returns to indoor free walker agency.Indoor free walker agency shows the route map that arrives shop 2 by display to the user, as shown in phantom in Figure 4.In addition because the artificial neural net in the relative signal strength server brings in constant renewal in, therefore, the user in the walking process of dotted line shown in Fig. 4, the position of explicit user in real time.
Fig. 5 is the schematic diagram of second embodiment of the invention, and father and mother and their children are positioned at the diverse location in shopping center, and can not see the other side mutually.At this moment, can use IATo pairing function of the present invention to seek the mobile radio terminal that children carry.The address information that the IATo wireless location agency of children's mobile radio terminal carries children's mobile radio terminal enters father and mother's mobile radio terminal, shows by pairing user's position on the display with the indoor free walker agency of this IATo the user.
If the mobile radio terminal in the shopping center is too much, can't overcome in the existing network technology under the situation of this problem, data flow between coherent signal acting server and/or the different mobile radio terminal equipment may produce obstruction, therefore, wireless location of the present invention agency can with the location agent communication that closes on to overcome this problem.
Intelligent agent provided by the invention has the autonomy of height, can enter different equipment, server, gateway and/or platform by wireless Internet, and can adapt to different network environments and different bandwidth.
Fig. 6 is the schematic diagram that mobile radio terminal of the present invention can be imitateed equipment.Fig. 6 has showed the application in the palmtop PC.The interface of being showed is the map under the screen mode toggle, under non-screen mode toggle, can also show the relevant information such as brief introduction, information of discount, advertisement, contact method of each businessman at the map periphery with tree-shaped information display mode.
The present invention is described by some embodiment, and those skilled in the art know, under the situation that does not break away from the spirit and scope of the present invention, can carry out various changes or equivalence replacement to these features and embodiment.In addition, under instruction of the present invention, can make amendment to these features and embodiment can not break away from the spirit and scope of the present invention to adapt to concrete situation and material.Therefore, the present invention is not subjected to the restriction of specific embodiment disclosed herein, and all interior embodiment of claim scope that fall into the application belong to protection scope of the present invention.
Claims (8)
1. one kind is used relative signal strength intelligence indoor locating system, it is characterized in that described system comprises that the IATo relative signal strength obtains agency, IATo relative signal strength server, IATo wireless location agency, IATo relative signal strength coupling agency, IATo free walker agency and is used between above-mentioned a plurality of agency and/or the WAP (wireless access point) of the communication between the server; Described IATo relative signal strength server comprises: IATo relative signal strength information bank and artificial neural net;
Described IATo relative signal strength information bank storage relative signal strength value;
Described artificial neural net is as training of relative signal strength information intelligent and intelligent updating;
Described IATo relative signal strength obtains the agency and receives the relative signal strength value, and the matching result that carries described IATo relative signal strength coupling agency returns described IATo free walker agency;
Described IATo wireless location agency obtains the agency from described IATo relative signal strength and receives the relative signal strength value;
The described relative signal strength value that the described IATo wireless location agency of described IATo relative signal strength coupling agency contrast obtains and the relative signal strength value of described IATo relative signal strength server to be obtaining the definite address of mobile radio terminal, and the value of described exact address is returned to described IATo wireless location agency;
Described IATo free walker agency receives the value that described IATo wireless location is acted on behalf of the described exact address that obtains.
2. the system as claimed in claim 1 is characterized in that, described system further comprises the pairing function that starts according to the user, and the user acts on behalf of the IATo pairing agency of the friend's who checks the user with mobile radio terminal position by described IATo wireless location.
3. the system as claimed in claim 1, it is characterized in that, described system further comprises the indoor information server of the IATo body of facilities information in the locker room for the basis, and, from indoor information server, obtain the information acquisition agency of the IATo of information for the basis according to customer requirements.
4. system as claimed in claim 2 is characterized in that, described IATo relative signal strength server further comprises:
Control and manage described IATo wireless location agency and described IATo pairing agency's the agent communication and the registration center that move and verify.
5. system as claimed in claim 4, it is characterized in that described system further comprises using and handled the IATo relative signal strength training agency that relative signal strength information is trained described artificial neural net in the described IATo relative signal strength information bank.
6. the system as claimed in claim 1, it is characterized in that, described IATo relative signal strength obtains to act on behalf of, described IATo free walker is acted on behalf of, the IATo wireless location is acted on behalf of, IATo relative signal strength coupling agency has autonomy highly, can enter different equipment, server, gateway and/or platform by wireless Internet, and can adapt to different network environments and different bandwidth.
7. one kind is used relative signal strength intelligence indoor orientation method, it is characterized in that described method comprises:
The S1.IATo relative signal strength obtains the relative signal strength that the agency obtains the mobile radio terminal current location;
S2.IATo wireless location agency obtains the agency from described IATo relative signal strength and receives the relative signal strength value;
The relative signal strength value that S3.IATo relative signal strength coupling agency contrast IATo wireless location agency obtains and the relative signal strength value of IATo relative signal strength server are to obtain the definite address of mobile radio terminal;
S4.IATo free walker agency receives the value that the IATo wireless location is acted on behalf of the definite address of carrying,
Described method further comprises relative signal strength data collection and the method that described IATo relative signal strength server is trained, and comprising:
A. indoor environment is divided into grid point, and obtains the relative signal strength information of each grid point of agency's collection for corresponding WAP (wireless access point) by described IATo relative signal strength;
B. described IATo relative signal strength obtains the agency and transmits relative signal strength information to described IATo wireless location agency;
C. described IATo wireless location agency carries relative signal strength information and enters described IATo relative signal strength server, and deposits relative signal strength information in described IATo relative signal strength server and carry out that data dump, data normalization are handled, data transaction;
The relative signal strength information that d.IATo training agency use has been handled is trained the artificial neural net in the described IATo relative signal strength server.
8. method as claimed in claim 7, it is characterized in that, acted on behalf of the address information of carrying by the described IATo wireless location of paired device and enter user's mobile radio terminal, show the position of being matched the user on the display with the indoor free walker agency of this IATo the user by the pairing subscriber equipment.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101571373A CN101191835B (en) | 2006-11-28 | 2006-11-28 | System and method for intelligent position finding using relevant signal intensity |
| PCT/CN2007/000495 WO2008064535A1 (en) | 2006-11-28 | 2007-02-13 | A system and method for intelligent indoor positioning with received signal strength |
| HK07103621A HK1098299A2 (en) | 2006-11-28 | 2007-04-04 | A system and method for intelligent indoor positioning with received signal strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101571373A CN101191835B (en) | 2006-11-28 | 2006-11-28 | System and method for intelligent position finding using relevant signal intensity |
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| CN101191835A CN101191835A (en) | 2008-06-04 |
| CN101191835B true CN101191835B (en) | 2011-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2006101571373A Expired - Fee Related CN101191835B (en) | 2006-11-28 | 2006-11-28 | System and method for intelligent position finding using relevant signal intensity |
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| Country | Link |
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| CN (1) | CN101191835B (en) |
| HK (1) | HK1098299A2 (en) |
| WO (1) | WO2008064535A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101470427B (en) * | 2007-12-27 | 2012-07-18 | 新动力(北京)建筑科技有限公司 | Building automatic control system and method based on wireless positioning |
| US8892118B2 (en) | 2010-07-23 | 2014-11-18 | Qualcomm Incorporated | Methods and apparatuses for use in providing position assistance data to mobile stations |
| US9148763B2 (en) * | 2010-07-30 | 2015-09-29 | Qualcomm Incorporated | Methods and apparatuses for mobile station centric determination of positioning assistance data |
| US8818401B2 (en) | 2010-07-30 | 2014-08-26 | Qualcomm Incorporated | Methods and apparatuses for use in determining that a mobile station is at one or more particular indoor regions |
| CN102088478A (en) * | 2010-12-02 | 2011-06-08 | 深圳市同洲电子股份有限公司 | Method and system for positioning digital television terminal |
| EP2518680A1 (en) * | 2011-04-28 | 2012-10-31 | RapidBlue Solutions Oy | Location based consumer profiling |
| CN103245343B (en) * | 2012-02-07 | 2016-03-30 | 联想(北京)有限公司 | A kind of relative positioning method and device |
| CN103888900A (en) * | 2014-02-21 | 2014-06-25 | 毛蔚青 | Automatic identification method based on building or geographic area of mobile terminal |
| US10849205B2 (en) | 2015-10-14 | 2020-11-24 | Current Lighting Solutions, Llc | Luminaire having a beacon and a directional antenna |
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2006
- 2006-11-28 CN CN2006101571373A patent/CN101191835B/en not_active Expired - Fee Related
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2007
- 2007-02-13 WO PCT/CN2007/000495 patent/WO2008064535A1/en active Application Filing
- 2007-04-04 HK HK07103621A patent/HK1098299A2/en unknown
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| CN1717592A (en) * | 2002-11-27 | 2006-01-04 | 皇家飞利浦电子股份有限公司 | Ranging and positioning method and apparatus |
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| WO2008064535A1 (en) | 2008-06-05 |
| HK1098299A2 (en) | 2007-07-13 |
| CN101191835A (en) | 2008-06-04 |
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