EP3391071A1

EP3391071A1 - Method and system for analyzing an environment of a mobile terminal

Info

Publication number: EP3391071A1
Application number: EP16791602.2A
Authority: EP
Inventors: Henry Feil; Florian Wildner
Original assignee: Osram GmbH
Current assignee: Osram GmbH
Priority date: 2015-12-16
Filing date: 2016-11-08
Publication date: 2018-10-24
Also published as: DE102015225388A1; US10613207B2; WO2017102178A1; US20180372854A1

Abstract

The invention relates to a method for analyzing an environment of a mobile terminal (32) by the emission of unique identification data (LID) associated with a lighting device by the lighting device (31) by means of light-based communication and by the determination of location coordinates of the mobile terminal in accordance with the identification data sensed by means of an optical sensing unit (35) of the mobile terminal with respect to the lighting device on the basis of stored location coordinates of the lighting device that are correlated with respective installation positions of the at least one lighting device. The method also comprises providing a sensor signal by means of at least one environment signal sensor (36), obtaining environment data from the sensor signal, and storing the environment data in connection with the location coordinates of the mobile terminal, whereby existing environment data are updated. The invention further relates to a system (30) for performing such a method.

Description

description

METHOD AND SYSTEM FOR ANALYZING AN ENVIRONMENT OF A MOBILE

TERMINAL

The invention relates to a method for analyzing a

In addition, the invention relates to a system for analyzing an environment of a mobile terminal according to the preamble of patent claim 9.

Light-based indoor navigation is based on the transmission of a unique light ID (LID) that can be received and detected using a mobile device. For this purpose, the LID is in the luminous flux - invisible to the human

Eye - modulated. To detect the signal with a mobile terminal, there must be a line-of-sight connection between the detector and the modulated light source

consist. The LID is again filtered out of the light and demodulated at the receiver. The LID itself can directly contain position information, or it can be determined indirectly via a lookup table. In the lookup table, an assignment of LID and

Position information instead. In addition to the position information, any additional metadata can be linked to the LID. This lookup table can be stored as an integrated part in an application that is on the mobile

Terminal is running, or on an external server

be deposited, which accesses the mobile terminal. Conversely, the lookup table can also be dynamic

Take information, for example, which mobile

Terminal which has queried position information. Thus, a dynamic movement profile can be recorded

(Tracking) and with a time stamp (Tracing). This movement information forms the basis for

various location-based services and analyzes. An illumination device which transmits data to a mobile terminal is known, for example, from WO 2015/148696 A1. This discloses techniques for position-based actions using light-based communication.

The system works only if one

Visual connection between the mobile terminal and the

Light source with the LID consists. Is used as a mobile device, for example, a mobile phone (smartphone) and this after the position query back in the bag

Although you get a position information that can be stored in the system, but can not be determined in the course of how the person or the mobile device has changed its position in the room further.

It is therefore an object of the present invention to provide a

To provide a method and a system that allows a more detailed analysis of a mobile terminal environment.

This object is achieved by a method with the

Features of claim 1 and by a system having the features of claim 9. Advantageous

Further developments of the present invention are the subject of the dependent claims.

The invention is based on a method for analyzing an environment of a mobile terminal by transmission

unique, associated with a lighting device

Identification data by means of light-based communication by the illumination device, and determining

Location coordinates of the mobile terminal in dependence on the detected via an optical detection unit of the mobile terminal identification data regarding the

Lighting device based on stored, with a respective mounting position of the at least one

Lighting device correlated spatial coordinates of the Beieuchtungseinrichtung. The invention is based on the finding that, for example, various wireless, radio-based systems such as WLAN or Bluetooth can be used to determine the position in buildings and thus for indoor navigation. On the one hand, the position of the transmitter (WLAN access point WAC or iBeacon) is known, and on the basis of the

Signal field strength of the received signal (received signal strength RSSI), the distance between transmitter and mobile receiver can be estimated. For a clear

Positioning will be at least three different

Transmission sources needed (trilateration). To further improve the system, a unique reference measurement of an environment is performed. A so-called "fingerprint" is created, which means that different signal sources in the environment are detected and their signal field strength is determined, resulting in a map that reflects these different signal field lines from different sources in a location-specific manner.

Based on such a signal reference card can now

faster without expensive trilateration calculations

Location coordinates are derived to a

Determining the position of the receiver, for example in the form of a mobile terminal (smartphone).

At the same time, the image accuracy increases, the more different static signal sources are included. For a high quality capture of

It is environment in such a fingerprint card

indispensable to use an accurate location system in the measurement to the measured signals and

To be able to assign information as precisely as possible to a place. The inventors have recognized that by means of light-based

Communication a very accurate position reference

is available. By means of an optical

Detection unit, such as a camera, the mobile terminal can thus be determined very accurately where the mobile terminal is located. This way a can

highly accurate location reference will be provided.

However, light-based communication can not be assumed to be available at all times. If the

Lighting device is off, can

For example, no light-based communication to

Will be provided. Moreover, that is

Position determination by means of light-based communication on a visual contact of the mobile terminal with the

Instructed lighting device. Moreover, there may be a need for energy saving or off

Privacy (data privacy) the optical

Detection unit, especially in the form of a camera, off. In such a case, therefore, only the other signal sources of the environment and the stored fingerprint card for determining the respective location

be resorted to. The invention is based on the further realization that the signals of the signal sources in the environment can change over time, for example, change their characteristics over their lifetime, dismantled or reinstalled. In particular, a reorganization of the spatial conditions can also be a major influence on the signals. How to change introduced into a room

Objects - in particular of metal - the propagation of electromagnetic waves. According to the invention, the method is therefore further developed by providing a respective sensor signal by at least one environmental signal sensor, obtaining environmental data from the respective sensor signal, and storing the environmental data as a function of the location coordinates of the mobile

Terminal, thereby reducing existing environmental data

to be updated. Under existing environment data in this case are such memory data to understand, which are correlated with the location coordinates, and at least for one valid environmental data over the previous period. In no case is it this data that are present only due to a pre-assignment and / or initialization of a corresponding memory device with basic settings, for example in the form of predeterminable bit patterns (0 Ohex / FF _he x) or based on random values.

Thus, according to the invention, the creation of a fingerprint card is not a one-time operation, but is a continuous process, that is, the database is constantly updated with the most up-to-date information from the environment of a known location. In particular, can

be provided that stored in each case determining location coordinates of the mobile terminal by means of light-based communication each new environmental data and thus the existing environment data are updated. By using light-based communication to

Positioning already when surveying and creating a fingerprint card will be a cost effective and

provided sufficiently accurate system, which provides a location information down to less than 10 centimeters in all three spatial directions. Preferably, the respective sensor signal is uniquely identifiable,

for example, via a transmitted with the sensor signal identifier or by a characteristic frequency spectrum.

According to an advantageous development, the method comprises, in a further step without availability of the identification data that can be detected via the optical detection unit, determining the location coordinates of the mobile terminal in

Dependence on the over the at least one

Environmental signal sensor obtained environmental data. Thus, after an at least one-time execution of a determination of location coordinates of the mobile terminal means

light-based communication and storing the

obtained environmental data in response to these

Location coordinates even with a switched off optical

Detection unit and / or disabled Lighting device and / or lack of visual contact with the lighting device, a position determination possible.

In the event that the location coordinates corresponding to the current location of the mobile terminal, in the

Associated with the associated environment data have not yet been saved, in other words, no accurate

Correlation of location coordinates with those obtained

Environment data exists, it can be provided that the best of the currently obtained environmental data stored environmental data by means of a predetermined

Criteria, for example by means of the least squares method. The location coordinates, which belong to the environment data determined in this way, can then be displayed on the mobile terminal, it being possible to provide additionally an indication of the deviation from the actual position, in particular an indication of the estimated extent of the deviation,

is shown. As a result of the repeated updating of the stored environment data, a more and more detailed reproduction of the image results over time

Signal characteristic of the environment. Moreover, it can be provided that the stored environment data, which have values correlated to a specific signal source,

be adjusted in a coordinated manner if a change in the

Signal source, such as a drop in the

Signal field strength is detected. In this way, on the basis of one or, for a higher reliability, a plurality of performed operations of determining

Location coordinates depending on the light-based

Communication and storing the associated

Environment data also such environment data are updated in the memory at the associated location coordinates not immediately an update measurement was made.

According to a further advantageous embodiment, the method comprises detecting a periodically variable physical environment parameter for providing the sensor signal, wherein the environmental data values relating to at least one frequency and / or an amplitude of the

Sensor signal included. These may be electrical and / or magnetic fields, changes in the

Light intensity or sound act. In addition to static

Signals can thus also be included alternating signals as unique information. In the case of alternating signals, the signal fluctuates around a determinable value, the

Mean, with a determinable amplitude and a determinable frequency. The alternating signals form special patterns that can help with determining the position.

These patterns may also occur only temporarily and in

Interact with other signals from the environment or influence them.

According to a further advantageous embodiment of the

Method may be provided that the environmental data are stored as a function of the respective time of day. A recording of the environmental information and the associated evaluation, that is to say the acquisition of the environmental data, can thus also include time-dependent fluctuations of the information. Thus, it can be detected which signal source is active at which location and at what time and optionally with which signal intensity. The more measurements performed over a day, the better the result in the resulting fingerprint card. Conversely, taking into account the time of day when creating the fingerprint card, this dependency can be minimized. This advantageously creates the fingerprint card as a function of the time of day. This can be done in

Advantageously, signal sources are considered in the creation of the fingerprint card whose

Operating behavior is coupled to a predetermined daily rhythm.

Alternatively or in addition to storing the environmental data as a function of the time of day, it may be provided that the environmental data depending on a particular

Environment event will be saved. Here can

For example, be recognized by an evaluation of the at least one ambient signal sensor when a subway enters a stop, and a corresponding

Fingerprint card can be used. Alternatively, the

Validity of a sensor signal are hidden,

for example, if, as a result of a train entering a station for the duration of the driveway recorded

Sensor signal changed so much that no reliable statement can be made here. In this case, a

Note on the mobile terminal to be provided that currently only one signal based on the interference-insensitive light-based communication is available - the example based on the reception of a radio signal sensor signal is ignored.

According to a further advantageous embodiment, the method comprises the steps of checking the environmental data for the presence of a previously known ambient signal signature and displaying one of the ambient signal signature

Device for a user of the mobile terminal. When evaluating environmental information, a

Pattern recognition to be performed. On the other hand, changes in the signal information can also be used to derive derivations about the environment itself. If, for example, many visitors or customers are in one place, the signaling information changes significantly. There are not necessarily other signal sources in the

Reception area attached, but the additional objects change the fingerprint card. Based on this, the environment data may be updated when an environment has changed significantly. Here, a new measurement can be triggered, the old reference is not valid until further notice, it can thus be a self-learning

Procedures are implemented. Thus, information can be generated as to how many or a few persons have stayed in one place, whether machines or electrical Devices were in use and even what kind of

Machines are concerned. Thus, a forklift generates a different environmental signal than, for example, one

Coffee machine. If these signal patterns are known, conclusions about the environment can be derived and also transmitted to other locations. Thus, depending on the existing infrastructure very specific patterns may occur, for example, a refrigerator has a significant

Radiation. If just such a pattern is detected, it is likely that another such device will be in place. Thus, a corresponding attribute in the fingerprint card

can be entered by means of which corresponding objects can be deduced. As a result, a user of the mobile terminal, for example, an indication of a

Cooling possibility to be displayed.

If the mobile terminal has a data connection with a data storage unit, in particular a central

Data storage unit is coupled in the form of a server in a network, which is set up to manage the fingerprint card, the attributes can be transmitted to the correspondingly detected values to the data storage unit. In this way, the determined data can be provided to other mobile terminals or their users. A corresponding update of the fingerprint card in response to a presence of a previously known ambient signal signature can

of course also be implemented autonomously on a mobile device.

According to a further advantageous embodiment, the method comprises the steps of comparing environment data, in particular radio data-based environment data, with a predeterminable reference, and outputting a warning signal, if one with an intensity of the environment data

underlying sensor signal correlated value falls below a predetermined reference value. The automatic Generated fingerprint cards can also be used to detect and report defects or failures in the environment. The signal sources used are often mainly for the mobile communication of data and are used only secondarily as a position information source. However, there are also signal sources which are used exclusively as position information sources, so-called (radio) beacons (example iBeacons). If a transmission source is continuously weaker, for example due to a discharged battery, or fails completely, then this information can be forwarded promptly with the exact location to a maintenance service.

According to a further advantageous embodiment, the method comprises logging results of determining the location coordinates of the mobile terminal for a

statistical evaluation. As a result, for example, coverage of a mobile radio infrastructure can be determined and used for quality improvement. In the

automatic creation of fingerprint cards can be evaluated two information. First will be the existing coverage of existing signal information sources

determined. Second, the actual demand and demand of position information with which

Accuracy requirement and with what frequency

logged. This allows an optimal demand adjustment of the locally provided infrastructure based on the local queries. In particular, this can

be provided that the type of query, the frequency of the query and the associated accuracy requirement

be logged and evaluated.

According to a further advantageous embodiment, the method comprises uniquely identifying the mobile

Terminal, wherein storing the environment data in

Depending on the identity of the mobile terminal takes place. The assignment of the determined environment data to a

Identity of the mobile terminal with which the Environment data were determined is particularly advantageous when the mobile terminal in a data connection to a central storage unit, such as a

Network server is available on which also more mobile

Devices have access. This allows individual

Receiving properties of the respective mobile terminal are taken into account and / or that depending on the equipment of the terminal used no corresponding

Ambient signal sensor for the respective environmental parameters, such as a magnetic field sensor, is present. Thus, the system becomes independent through use steadily

updated and improved. Also, new sources of information for which no use is provided today, or for which no sensors in the mobile terminal

(Smartphone), can be included later. For this purpose, only a software (App) to update the mobile device.

Furthermore, the integration of the orientation of the mobile terminal in the recording of the fingerprint card

be provided, which represents a further improvement of the database. This method can also be integrated automatically with this method, which would be associated with a manual acquisition with a very high expenditure of time. This concerns in particular also the problem of the

Body shield. Bluetooth and Zigbee work

for example, in a frequency range in which water has a strong damping effect; the own body of the

Person carrying the mobile terminal thus shields the signal.

The invention is further based on a system for analyzing an environment of a mobile terminal, comprising the mobile terminal and at least one illumination device which is designed for clear identification data assigned to the illumination device by means of light-based

Send communication. In this case, the mobile terminal is designed to place coordinates of the mobile terminal in Dependence on the identification data, acquired via an optical detection unit of the mobile terminal, with respect to the illumination device on the basis of

Data storage unit stored to determine correlated with a respective installation position of the at least one illumination device location coordinates of the illumination device. According to the invention, the system is characterized

further developed that the mobile terminal comprises at least one environmental signal sensor for providing a respective sensor signal, wherein the mobile terminal to

is designed to obtain environmental data from the respective sensor signal, and wherein the system is adapted to store the environment data in dependence on the location coordinates of the mobile terminal and thereby update existing environmental data.

Preferably, the illumination device is designed as an LED light, which in particular comprises an LED illuminant (LED module) and an electronic operating device (ballast) for operating the LED illuminant. The mobile

Terminal may preferably be a smartphone, tablet PC, a laptop or a mobile camera-assisted detection unit, in particular for use in mobile robots. According to an advantageous development, the system comprises a central server unit, which comprises the data storage unit and is designed for a bidirectional communication connection with the mobile terminal. As a result, the environmental data obtained can be stored centrally and are also available for other mobile devices. The central server unit is not necessarily bound to a physical network component, it can of course be a virtual machine, which is implemented for example in a so-called cloud.

According to an alternative embodiment of the system it can be provided that the data storage unit is designed as an internal storage unit on the mobile terminal. In In this case, the obtained environmental data can be stored directly on the mobile terminal. Appropriately, in this case, the environment data are also stored on the data storage unit, that is, on the mobile device itself. The data storage unit on the mobile terminal can, of course, from

different physical storage units

be composed, for example, from an internal

Memory of the mobile terminal and from a plug-in card, such as a micro-SD card.

Likewise, it can be provided that optionally depending on

Availability of a data storage unit on one

Server unit and / or an internal / external

Data storage unit of the mobile terminal can be used. Particularly advantageous may be a local storage on the mobile terminal and a server-based storage

be provided outside the mobile terminal. The determination of the location coordinates of the mobile terminal can, depending on the specific embodiment of the

Data storage unit either as central

Data storage unit on a server unit or as a decentralized storage unit on the respective mobile

Terminal already done on the server unit itself or on the mobile device. It is also conceivable here to provide position-determining raw data by a server unit to the mobile terminal, wherein corresponding calculations are carried out on the mobile terminal, which finally result in the determination of the location coordinates of the mobile terminal.

The advantage of a solution according to the invention is that, even if no visual connection to a light-based navigation system is available, it is always possible to resort to the latest fingerprint maps and thus the best possible non-light-based position determination

is possible. In particular, by the method for continuous recording of signal and

Environmental information for optimizing

Positioning systems, the system independently by the use of constantly updated and improved. The method described can also be applied to others

Positioning systems transmitted. This is always based on the most accurate location system, based on a reference measurement. Other systems, which do not use this exact location system, can thus fall back on the generated reference cards (fingerprint card).

The advantages and preferred embodiments described for the method according to the invention also apply to the system according to the invention and vice versa. Consequently, device features corresponding to device features and vice versa may be provided.

The features and feature combinations mentioned above in the description as well as those described below in the

Description of figures mentioned and / or shown alone in the figures features and combinations of features can be used not only in the specified combination, but also in other combinations or alone, without departing from the scope of the invention. There are thus also embodiments to be regarded as disclosed by the invention, which are not explicitly shown or explained in the figures, but by separated feature combinations of the

explained embodiments emerge and are producible. Further advantages and features will become apparent from the following description of exemplary embodiments

Consideration of the attached figures. In the figures, like reference numerals denote like features and

Functions.

Show it: 1 is a simplified schematic representation of a first arrangement of a mobile terminal within the range of action of multiple signal sources,

Fig. 2 in a simplified schematic representation

second arrangement in modified form,

Fig. 3 in a simplified schematic representation

preferred embodiment of a

system according to the invention, and

Fig. 4 in a simplified schematic representation

preferred embodiment of a

inventive method.

The creation of a so-called fingerprint card

(Fingerprint Map) is based on that available

Signal sources that are uniquely identifiable, in terms of their at a particular location

present receiving parameters are evaluated. Radio transmitters in which the signal strength of the electric or magnetic field is reciprocal with the distance to the signal have proven to be particularly suitable

Signal source or its transmitting antenna decreases.

An arrangement shown in FIG. 1 comprises a mobile terminal 15, and a first signal source 11, a second signal source 12, a third signal source 13 and a fourth signal source 14. The four signal sources 11, 12, 13, 14 are at the corners of a Rectangle, which is covered with a rectangular coordinate grid. In

horizontal direction from left to right, X coordinates are entered with the values XI, X2, X3, X4 to Xn, in

vertical direction from top to bottom are entered Y-coordinates with values Yl, Y2, Y3, Y4, Y5 to Yn.

For each of the four signal sources 11, 12, 13, 14 lines of the same signal strength ("contour lines") are drawn in each case, the numbering always starts with 1 at the line closest to the respective signal source and thus represents the highest level of signal strength represented by the individual lines of the same signal strength curve, with increasing distance from the respective signal source and thus increasing numbering decreases the corresponding signal strength accordingly.

Thus, a first set of lines results

graduated signal strength curve RSSI_11_1, RSSI_11_2,

RSSI_11_3, RSSI_11_4, RSSI_11_5, which is the first

Signal source 11 is assigned. In the same way, a corresponding set of second lines results in the same

Signal strength curve, which is correlated with the second signal source 12, namely RSSI_12_1, RSSI_12_2, RSSI_12_3,

RSSI_12_4, RSSI_12_5. Likewise, a third set of lines with the same signal strength curve results, which is assigned to the third signal source 13, which comprises the lines RSSI_13_1, RSSI_13_2, RSSI_13_3, RSSI_13_4. The same applies to a fourth set of lines of equal signal strength

RSSI_14_1, RSSI_14_2, RSSI_14_3, RSSI_14_4 the assignment to the fourth signal source 14.

In the rectangular grid, a mobile terminal 15 is arranged at the coordinates X4 / Y5. The lines are the same

Signal strength are only insofar as shown in FIG. 1

drawn as they are needed to determine the respective value for the mobile terminal 15. According to the

The arrangement shown is thus at the location of the mobile

Terminal 15, the signal of the first signal source 11 with a signal strength receivable, which in the field of

Signal strength line RSSI_11_5, in the area of the signal strength line RSSI_12_5, in the area of the signal strength line RSSI_13_4 and in the area of the signal strength line RSSI_14_4.

Conveniently, the lines indicate the same

Signal strength independent of the respective signal source 11, 12, 13, 14 each have a same range of the associated Signal field strength, in other words, for example, the second signal source 12 on the second line RSSI_12_2 receive as strong as the fourth signal source 14 on the line RSSI_14_2.

Fig. 2 shows the same arrangement of the mobile terminal 15 within the four signal sources 11, 12, 13, 14, wherein in contrast to the illustration in Fig. 1 now a first object 21 and a second object 22 are introduced into the room with corresponding Effects on the propagation of the signals from the respective signal sources 11, 12, 13,

14 radiated signals.

The signal radiated by the first signal source 11 is impeded on the way to the mobile terminal 15 neither by the first object 21 nor by the second object 22, so that here furthermore, as already previously shown in the illustration of FIG. 1, that the first signal source 11 is received with a signal strength in the region of the line RSSI_11_5. The same applies mutatis mutandis to the third signal source 13, also here is the direct line of sight between the mobile terminal

15 and the third signal source 13 is not adjusted by one of the two objects 21, 22, so that here continues an undisturbed signal propagation is possible. As a result, the reception of the signal radiated from the third signal source 13 at the position X4 / Y5 is in the range of the line

RSSI_13_4 possible.

However, the first object 21 is directly between the second signal source 12 and the mobile terminal 15 and thus prevents undisturbed propagation of the signal emitted by the second signal source 12. For simplicity, therefore, only three lines RSSI_12_1, RSSI_12_2,

RSSI_12_3 shown. Due to the size of the first

Item 21 in this case the signal 15 at the coordinates X4 / Y5 completely shielded (No_RSSI_12). In a comparable manner, the second object 22 stands directly between the fourth signal source 14 and the mobile terminal 15. Although the second object 22 is smaller than the first object 21, it is at a significantly smaller distance from the fourth signal source 14 than the first object 21 to the second signal source 12, and thus prevents more pronounced undisturbed

Propagation of the fourth signal source 14th

emitted signal. For simplicity, therefore, only a line RSSI_12_1 is shown. Thus, the signal of the fourth signal source 14 at the coordinates X4 / Y5, where the mobile terminal 15 is located, no longer receivable (No_RSSI_14). Under the simplifying assumption that the numbering of the signal field strength lines is reciprocal to the respective receivable signal strength, this results for one

Signal strength vector {RSSI_11 / RSSI_12 / RSSI_13 / RSSI_14} in each case at the position (X4 / Y5) in the first arrangement:

{0.2 / 0.2 / 0.25 / 0.25} or in the environment disturbed by the first article 1 and the second article 2 according to the second arrangement: {0.2 / 0 / 0.25 / 0} ,

Thus, subsequent changes in the environment lead to a significant change in the distribution of the respective signal strengths, so that either completely wrong values for the X coordinates or Y coordinates are determined, or no coordinates can be found which consistent with such a value combination bring.

Thus, expediently, at every bidding

Opportunity determines the respective environment data, so in the present example pairs of values of the respective

Signal strengths RSSI_11, RSSI_12, RSSI_13, RSSI_14 aligned.

Fig. 3 shows a preferred embodiment of a

inventive system. The system 30 includes a light 31, a smartphone 32 and a central server unit 34. The lamp 31 emits a light ID LID, which can be received by a camera 35 of the smartphone 32. Between the smartphone 32 and the central server unit 34 there is a data connection 33. Furthermore, the smartphone 32 comprises a radio reception module 36, which is designed to

Radio signals of the first signal source 11, the second

Signal source 12, the third signal source 13 and the fourth signal source 14 to receive in the

Impact area the smartphone 32 is located.

The smartphone 32 as shown in FIG. 3

corresponds to the receiver 15 of the illustrations in FIGS. 1 and 2. The radio receiving module 36 is configured to each of the received radio signals one

Signal strength to determine, in detail, a first

Signal strength RSSI_11 the first signal source 11, a second signal strength RSSI_12 the second signal source 12, a third signal strength RSSI_13 the third signal source 13 and a fourth signal strength RSSI_14 the fourth signal source fourteenth

Via the data connection 33, the light ID LID can be transmitted to the central server unit 34, likewise the respective signal strengths RSSI_11, RSSI_12, RSSI_13,

RSSI_14 are transmitted to the central server unit 34. In return, one of each determined

Position information, for example in the form of X-coordinates and Y-coordinates, are transmitted back to the smartphone 32. Optionally, the smartphone 32 may be a remote one

Memory unit 32s in the form of an internal, permanently installed memory module or an external, pluggable

Memory modules, for example in the form of an SD card, in particular in the form of a micro SD card, be equipped, which instead of the central server unit 34 for the

Positioning provides required data. This can be realized, for example, by providing the required data in advance from the central server unit 34 have been downloaded and are now available offline, even without an existing data connection 33.

Of course, the environment data updated in the meantime in the decentralized storage unit 32s can be restored to the central server unit 34 with a later restored data connection 33

be synchronized.

Fig. 4 shows a preferred embodiment of a

inventive method. The execution of the individual method steps is in this case divided into a software SW32, which runs on the smartphone 32, and to a software SW34, which is executed on the central server unit 34. The execution begins at a start SO. In a first step Sl takes place from the

Smartphone 32, a position determination request based on light-based communication, wherein the light ID LID is transmitted to the central server unit 34. In a second step S2, the central server unit 34 determines therefrom the position of the smartphone 32, which is representative of any mobile terminal, and transmits the associated X-coordinate X and Y-coordinate Y to the

Smartphone 32, which receives them in a third step S3 and further processed.

In the further course of the smartphone 32 performs a fourth step S4, in which a measurement is initiated for the determination of environmental data. In a fifth step S5, the determined environmental data in the form of

Signal strengths RSSI_11, RSSI_12, RSSI_13, RSSI_14 (first

Signal strength, second signal strength, third signal strength, fourth signal strength) are transmitted to the central server unit 34, where in a sixth step S6 the so-called fingerprint card is updated (update). Both the determined environmental data and the

associated position data, for example in the form of the X coordinate X and the Y coordinate Y deposited. In a first execution stage (first step S1, second step S2, third step S3), the light-based

Navigation system used to determine the position - as described above. In a second stage (fourth step S4, fifth step S5, sixth step S6) all available information from the environment is detected (such as the signal field strength of present transmitters in the environment such as mobile networks, WiFi, Bluetooth, ultra-wide band, Magnetic field, geomagnetic field or

electromagnetic fields through current-carrying conductors or machines, light intensity, for example through windows, acoustic signals) and to a database in the form of the central server unit 34. This process is triggered, for example, in the background when a user uses his smartphone 32 to obtain an exact (light-based)

Position determination.

The continuous recording of the ambient signals creates a constantly updated fingerprint card with up-to-date time, location and signal information. As a result, for example, the above-mentioned disadvantage of a merely one-time measurement for creating the fingerprint card is compensated for, that changes in the environment change the signals. Thus, the accuracy and reliability of spatial resolution for devices that do not use light-based location improve significantly.

The embodiments are only illustrative of the invention and are not limiting for these. In particular, the location of execution of method steps can be shifted from the smartphone 32 to the central server unit 34 and / or moved from the central server unit 34 to the smartphone 32, without departing from the spirit of the invention.

Thus, it has been shown above how a

Reference source for highly accurate location in buildings can be generated. Reference sign list first signal source 11

second signal source 12

third signal source 13

fourth signal source 14

Receiver 15

System 30

Luminaire 31

Smartphone 32

distributed storage unit 32s

Data connection 33

central server unit 34

Camera 35

Radio receiving module 36

Light ID LID

first signal strength RSSI_ 11

second signal strength RSSI_ 12

third signal strength RSSI_ _13

fourth signal strength RSSI_ 14

first sentence of

Signal strength lines RSSI_ 11 _1, RSSI_ 11

RSSI_ 11 >> RSSI_ 11

RSSI_ 11 _5

second sentence of

Signal strength lines RSSI_ 12 _1, RSSI_ 12

RSSI_ 12 >> RSSI_ 12

RSSI_ 12 _5

third sentence of

Signal strength lines RSSI_ _13_ _1, RSSI_ _13

fourth sentence of

Signal strength lines RSSI_ 14 _1, RSSI_ 14

RSSI 14 3, RSSI 14 Start SO first step Sl second step S2 third step S3 fourth step S4 fifth step S5 sixth step S6

Claims

claims

1. Method for analyzing a mobile environment

Terminal (15, 32) through

- Transmission of unique, an illumination device associated identification data (LID) means

light-based communication through the

Lighting device, and

- Determining location coordinates (X, Y) of the mobile terminal in response to the via an optical detection unit

(35) of the mobile terminal detected identification data with respect to the illumination device based on stored, correlated with a respective mounting position of the at least one illumination device

Spatial coordinates of the illumination device,

marked by:

- Providing a respective sensor signal

at least one environmental signal sensor (36),

- Obtaining environmental data (RSSI_11, RSSI_12, RSSI_13, RSSI_14) from the respective sensor signal, and

- Save the environment data depending on the

Location coordinates of the mobile terminal, which updates existing environment data.

2. The method according to claim 1,

marked by

- In a further step without availability of the detectable via the optical detection unit

Identification data (LID) Determining the location coordinates (X4, Y5) of the mobile terminal in dependence on the data obtained via the at least one environmental signal sensor

Environment data (RSSI_11, RSSI_12, RSSI_13, RSSI_14).

3. The method according to any one of the preceding claims,

marked by

Detecting a periodically changing physical environment parameter for providing the sensor signal, wherein the environmental data includes values relating to at least one of a frequency and amplitude of the sensor signal.

4. The method according to any one of the preceding claims,

characterized in that

the environmental data depending on the particular

Be stored at the time of day.

5. The method according to any one of the preceding claims,

marked by

- Checking the environment data for the presence of a previously known ambient signal signature, and

Displaying a device associated with the environment signal signature for a user of the mobile device.

6. The method according to any one of the preceding claims,

marked by

- Compare environment data, in particular on

Radio data based environment data, with a predetermined reference, and

- Issuing a warning signal when correlated with an intensity of the environmental data underlying sensor signal a predetermined reference value

falls below.

7. The method according to any one of the preceding claims,

marked by

Logging results of determining the

Location coordinates of the mobile terminal for a statistical evaluation.

8. The method according to any one of the preceding claims,

marked by

- Uniquely identifying the mobile terminal (15, 32), wherein the storing of the environment data depending on the identity of the mobile terminal takes place.

9. system (30) for analyzing a mobile environment

Terminal, comprising:

- The mobile terminal (15, 32), and

- At least one lighting device (31) which is designed, unique, the lighting device associated

Identification data (LID) using light-based

Sending out communication, whereby

- The mobile terminal is designed to spatial coordinates of the mobile terminal in response to the detected via an optical detection unit (35) of the mobile terminal

Identification data relating to the illumination device on the basis of stored in a data storage unit (32s, 34), correlated with a respective mounting position of the at least one illumination device

Locate coordinates of the lighting device to determine, characterized in that

the mobile terminal comprises at least one ambient signal sensor (36) for providing a respective sensor signal, the mobile terminal being designed to

Obtain environmental data from the respective sensor signal, and wherein the system is designed to

- Save the environment data in dependence on the location coordinates of the mobile terminal and thereby update existing environmental data.

10. System (30) according to claim 9,

marked by

- A central server unit (34), which the

Data storage unit (32s, 34) comprises and for a

bi-directional communication connection with the mobile

Terminal (15, 32) is designed.

11. System (30) according to claim 9,

characterized,

that the data storage unit (32s, 34) as internal

Storage unit (32s) on the mobile terminal (15,

32) is formed.