CN105025569A - Method, system and device for indoor positioning - Google Patents

Abstract

The embodiment of the invention provides an indoor positioning method, system and apparatus. The method comprises: determining the deviation value between the signal intensity of a first network signal, and the signal intensity of a second network signal through obtaining the signal intensity of a first network signal, and the signal intensity of a second network received by a user terminal at an antenna point; matching the obtained deviation value with fixed deviation values in a first preset list keeping corresponding relations between fixed deviation values and antenna points; and when the deviation value corresponding to the user terminal matches a deviation value in the first preset list, setting the position information of the antenna point corresponding to the matched fixed deviation value as the position information of the user terminal. Accordingly, the indoor positioning method, system and apparatus reduce the cost of positioning the user terminal indoors, and improve the accuracy of positioning the terminal indoors in a certain degree.

Description

Method, system and device for indoor positioning

technical field

The present invention relates to the field of communication technology, in particular to an indoor positioning method, system and device.

Background technique

The current outdoor positioning technology mainly uses satellite positioning systems, such as the Beidou positioning system, and mobile base station assisted positioning. Its positioning must rely on the time difference of arrival of multiple satellite signals or radio frequency signals of multiple base stations for positioning calculations, but outdoor positioning technology cannot play its role in indoor environments because satellite signals cannot be received.

In order to achieve indoor positioning, radio frequency identification technology (English: Radio Frequency Identification for short: RFID) is introduced, that is, by deploying multiple positioning signal sources or positioning signal tags indoors, the strength or delay similar to outdoor positioning is used. The calculation method locates indoor users.

Although radio frequency identification technology can locate indoor users, this positioning method requires the deployment of a large number of positioning signal sources, and positioning cannot be achieved in places where no positioning signal sources are deployed. This not only makes indoor positioning costly, but also accurate positioning Sex is also lower.

Contents of the invention

The invention provides a method, system and device for indoor positioning, which are used to solve the problems in the prior art that the indoor positioning cost is high and the positioning accuracy is low due to the adoption of RFID technology.

The specific plan is as follows:

A method for indoor positioning, the method is applied to an indoor distribution system, and antenna points in the indoor distribution system are distributed in different indoor positions, the method comprising:

Obtain the signal strength of the first network signal received by the user terminal under the antenna point and the signal strength of the second network signal received, and determine the signal strength between the signal strength of the first network signal and the signal strength of the second network signal Deviation;

Matching the offset value with the fixed offset value in the first preset list that stores the correspondence between the fixed offset value and the antenna point;

If the offset value of the user terminal matches a fixed offset value in the first preset list, position the location information of the antenna point corresponding to the fixed offset value as the location information of the user terminal.

Optionally, before acquiring the signal strength of the first network signal received by the user terminal under the antenna point and the signal strength of the second network signal received, the method further includes:

Obtaining a fixed offset value of each antenna point in the indoor distribution system, the fixed offset value being the strength of the first network signal emitted by the antenna point and the signal strength of the second network signal emitted by the antenna point difference between intensities;

Determine the position information of each antenna point in the indoor distribution system, and generate the first preset list storing the fixed offset value corresponding to the position information of the antenna point and the antenna point.

Optionally, before acquiring the signal strength of the first network signal received by the user terminal under the antenna point and the signal strength of the second network signal received, the method further includes:

Obtain the location information of the current location of the user terminal in the area covered by the antenna point, and obtain the fixed feature envelope of the user terminal at the current location, the fixed feature envelope includes the information received by the user terminal through different The signal strength and signal delay corresponding to the first network signal and the second network signal sent by the path;

and generating a second preset list storing the location information of the user terminal and the fixed feature envelope corresponding to the location information.

Optionally, if the deviation value of the user terminal matches a fixed deviation value in the first preset list, position the position information of the antenna point corresponding to the fixed deviation value as the position information of the user terminal ,include:

If the offset value of the user terminal matches a fixed offset value in the first preset list, acquire the feature envelope of the user terminal;

matching the acquired feature envelope with the fixed feature envelope in the second preset list;

If the acquired feature envelope matches a fixed feature envelope in the second preset list, determine the location information corresponding to the matched fixed feature envelope as the location information of the user terminal.

An indoor positioning system, comprising:

The first acquisition module is configured to acquire the signal strength of the first network signal received by the user terminal under the antenna point and the signal strength of the second network signal received, and determine the signal strength of the first network signal and the second network signal The deviation value between the signal strengths of the signals;

A matching module, configured to match the deviation value with the fixed deviation value in the first preset list that stores the correspondence between the fixed deviation value and the antenna point;

A processing module, configured to position the position information of the antenna point corresponding to the fixed deviation value as the position of the user terminal if the deviation value of the user terminal matches a fixed deviation value in the first preset list information.

Optionally, also include:

The second acquisition module is configured to acquire a fixed offset value of each antenna point in the indoor distribution system, where the fixed offset value is the difference between the strength of the first network signal transmitted by the antenna point and the intensity of the first network signal transmitted by the antenna point The difference between the signal strengths of the second network signal;

A generation module, configured to determine the position information of each antenna point in the indoor distribution system, and generate the first preset that saves the fixed deviation value corresponding to the position information of the antenna point and the antenna point list.

Optionally, the second obtaining module is further configured to obtain location information of the current location of the user terminal in the area covered by the antenna point, and obtain a fixed feature envelope of the user terminal at the current location, the fixed The characteristic envelope includes the signal strength and signal delay corresponding to the first network signal and the second network signal received by the user terminal and sent through different paths;

The generating module is further configured to generate a second preset list storing the current location information of the user terminal and the fixed feature envelope corresponding to the current location information.

Optionally, the processing module includes:

An acquiring unit, configured to acquire the feature envelope of the user terminal if the deviation value of the user terminal matches a fixed deviation value in the first preset list;

a matching unit, configured to match the acquired feature envelope with the fixed feature envelope in the second preset list;

A determining unit, configured to determine the current location information corresponding to the matched fixed feature envelope as the location of the user terminal if the acquired feature envelope matches a fixed feature envelope in the second preset list information.

An indoor positioning device, comprising:

The sensor is configured to obtain the signal strength of the first network signal received by the user terminal under the antenna point and the signal strength of the second network signal received;

a processor, configured to determine a deviation value between the signal strength of the first network signal and the signal strength of the second network signal, and compare the deviation value with a first preset that stores a correspondence between a fixed deviation value and an antenna point The fixed offset value in the list is matched, and if the offset value of the user terminal matches a fixed offset value in the first preset list, the position information of the antenna point corresponding to the fixed offset value is positioned as the Location information of the user terminal.

Optionally, the sensor is further configured to acquire a fixed deviation value of each antenna point in the indoor distribution system, where the fixed deviation value is the same as the strength of the first network signal transmitted by the antenna point and the The difference between the signal strengths of the second network signal transmitted by the antenna point;

The processor is further configured to determine the position information of each antenna point in the indoor distribution system, and generate the first fixed offset value that stores the position information of the antenna point and the antenna point a preset list.

Optionally, the sensor is further configured to acquire location information of the current location of the user terminal in the area covered by the antenna point, and acquire a fixed feature envelope of the user terminal at the current location, the fixed feature envelope contains the signal strength and signal delay corresponding to the first network signal and the second network signal received by the user terminal and sent through different paths;

The processor is further configured to generate a second preset list storing the current location information of the user terminal and the fixed feature envelope corresponding to the current location information.

Optionally, the processor is further configured to acquire a feature envelope of the user terminal if the offset value of the user terminal matches a fixed offset value in the first preset list, and the acquired feature envelope The envelope is matched with a fixed feature envelope in the second preset list, and if the acquired feature envelope matches a fixed feature envelope in the second preset list, the matched fixed feature The current location information corresponding to the envelope is determined as the location information of the user terminal.

An indoor positioning method provided in an embodiment of the present invention determines the first network signal by obtaining the signal strength of the first network signal received by the user terminal under the antenna point and the signal strength of the second network signal received The deviation value between the signal strength of the signal strength of the second network signal and the signal strength of the second network signal, and the deviation value obtained is matched with the fixed deviation value in the first preset list in which the corresponding relationship between the fixed deviation value and the antenna point is saved. If the user terminal When the corresponding offset value matches a fixed offset value in the first preset list, the location information of the antenna point corresponding to the matched fixed offset value is positioned as the location information of the user terminal. That is to say, in the embodiment of the present invention, when the indoor positioning of the user terminal is performed, no specific equipment needs to be installed, but the current wireless communication network is combined, and then the location of the user terminal is located based on the signal strength of the network signal received by the user terminal. This not only reduces the cost of locating the user terminal indoors, but also improves the accuracy of locating the user terminal in the indoor environment to a certain extent.

In addition, in the embodiment of the present invention, after the antenna point where the user terminal is located is determined, the feature envelope of the user terminal will be further acquired, and the acquired feature envelope will be matched with the fixed features in the second preset list. When the acquired feature envelope matches the fixed feature envelope in the second preset list, the current location information corresponding to the matched fixed feature envelope is determined as the location information of the user terminal, where the feature envelope is the user terminal The received signal strengths and signal delays corresponding to the first network signal and the second network signal sent through different paths, that is, the specific position of the user terminal under the antenna point can be accurately located through the characteristic envelope.

Description of drawings

Fig. 1 is the system structural diagram of indoor distribution system in the embodiment of the present invention;

Fig. 2 is a schematic diagram of the topology structure of the indoor distribution system in the embodiment of the present invention;

FIG. 3 is a flowchart of a method for indoor positioning in an embodiment of the present invention;

4 is a schematic diagram of a signal transmission path between an antenna point and a user terminal in an embodiment of the present invention;

5 is a schematic diagram of a characteristic envelope of a user terminal at a certain position under an antenna point in an embodiment of the present invention;

6 is a schematic diagram of coordinates for positioning a user terminal through antenna points in an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an indoor positioning system in an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of another indoor positioning system in an embodiment of the present invention;

Fig. 9 is a schematic structural diagram of an indoor positioning device according to an embodiment of the present invention.

Detailed ways

The technical solutions of the present invention will be described in detail below with reference to the drawings and specific embodiments.

Embodiment one:

In the embodiment of the present invention, in order to solve the problem that the indoor positioning method for the user using RFID technology in the prior art results in high cost of indoor positioning and low positioning accuracy, the embodiment of the present invention provides an indoor The method of positioning, the implementation of this method needs to be based on the indoor communication network.

Specifically, in order to enable the internal communication network signal of a large building to cover the entire building, communication operators will deploy an indoor distribution system in the building (as shown in Figure 1). Routers, power splitters, feeders and antenna points.

Since a combiner is added to the indoor distribution system, the indoor distribution system can bear different network signals. For example, the indoor distribution system can simultaneously carry network signals such as 2G/3G/4G/WIFI, which makes multiple networks in different frequency bands Network signals are simultaneously transmitted to each antenna point through the same indoor distribution system. In addition, in order to ensure the coverage effect of the indoor distribution system, the distance between antenna points generally does not exceed 20 meters.

Since some indoor systems use different frequency bands for transmission of different network signals, and are affected by the physical characteristics of devices in the indoor distribution system, the loss or gain of different network signals passing through the same power divider and feeder is also different, which makes different networks When the signal arrives at each antenna point, there will be a fixed offset value between the different network signals on each antenna point. This fixed offset value is directly related to the transmission path of the network signal in the indoor distribution system. Therefore, the fixed offset value corresponding to each antenna point is completely different. As long as the fixed deviation value is obtained, the corresponding antenna point can be located.

For example, in the indoor distribution system shown in Figure 2, the indoor distribution system consists of a signal source, a combiner, two power dividers, three antenna points, and seven feeders. Two Network signal, one network signal is GSM signal, the other network signal is TD signal. Since the frequency attenuation of the two network signals by the combiner, power splitter, and feeder is different, the frequency attenuation of the GSM signal and the TD signal in the indoor distribution system is explained in detail below:

The first attenuation: the GSM signal is transmitted to the combiner through feeder 1, and the TD signal and feeder 2 are transmitted to the combiner. At this time, the signal strength of the GSM signal when it reaches the combiner is: P _{(GSM) source} -P _{(GSM) line 1} ; The signal strength when arriving combiner for TD signal is: P _{(TD) source} -P _{(TD) line 2} , wherein P _{(GSM) source} is the signal strength of GSM signal at signal source place, P _{(GSM) line 1} is the frequency attenuation of GSM signal on feeder 1; P _{(TD) source} is the signal strength of TD signal at the signal source, and P _{(TD) line 2} is the frequency attenuation of TD signal on feeder 2 .

The second attenuation: the attenuation of the GSM signal and the TD signal in the combiner. At this time, the signal strength of the GSM signal after the attenuation of the combiner is: P _{(GSM) source} - P _{(GSM) line 1} - P _{(GSM) combination} ; the signal strength of the TD signal after the attenuation of the combiner is: P _{(TD) source} -P _{(TD) line 2} -P _{(TD) combination} , where P _(GSM) is a GSM signal The frequency attenuation in the combiner, P _(TD) is the frequency attenuation of the TD signal in the combiner.

The third attenuation: the GSM signal and the TD signal are transmitted from the combiner to the power divider 1 through the feeder 3. At this time, the signal strength of the GSM signal when it reaches the combiner is: P _{(GSM) source} -P _{(GSM) Line 1} -P _{(GSM) combined} -P _{(GSM) line 3} ; For the signal strength when the TD signal arrives at the combiner is: P _{(TD) source} -P _{(TD) line 2} -P _{(TD) combined} -P _{( TD) line 3} , wherein, P _{(GSM) line 3} is the frequency attenuation of the GSM signal on the feeder 3; P _{(TD) line 3} is the frequency attenuation of the TD signal on the feeder 3.

The fourth attenuation: the frequency attenuation of the GSM signal and the TD signal on the power divider 1. At this time, the signal strength of the GSM signal after the frequency attenuation of the power divider 1 is: P _{(GSM) source} -P _{(GSM ) line 1} -P _{(GSM) combined} -P _{(GSM) line 3} -P _{(GSM) work 1} ; for the signal strength of the TD signal after the power divider 1 frequency attenuation is: P _{(TD) source} -P _{(TD ) line 2} -P _(TD) close-P _{(TD) line 3} -P _{(TD) work 1} , wherein, P _{(GSM) work 1} is the frequency attenuation of the GSM signal on the power divider 1; P _{(TD) Work 1} is the frequency attenuation of the TD signal on the power divider 1 .

Fifth attenuation: GSM signal and TD signal reach antenna point 1 through feeder 4, so the GSM signal strength on antenna point 1 is: P _{(GSM) source} -P _{(GSM) line 1} -P _{(GSM) combined} -P _{(GSM) line 3} -P _{(GSM) work 1} -P _{(GSM) line 4} , the TD signal strength on antenna point 1 is: P _{(TD) source} -P _{(TD) line 2} -P _(TD) close-P _{(TD) line 3} -P _{(TD) power 1} -P _{(TD) line 4} , wherein, P _{(GSM) line 4} is the frequency attenuation of GSM signal on feeder 4; P _{(TD) line 4} is TD signal in Frequency attenuation on feeder 4.

The sixth attenuation: GSM signal and TD signal are transmitted to power divider 2 through feeder 5, and the signal strength when GSM signal is transmitted to power divider 2 is: P _{(GSM) source} -P _{(GSM) line 1} -P _{( GSM) combined} -P _{(GSM) line 3} -P _{(GSM) power 1} -P _{(GSM) line 5} , the signal strength when the TD signal is transmitted to the power divider 2 is: P _{(TD) source} -P _{(TD) line 2} -P _{(TD) combined} -P _{(TD) line 3} -P _{(TD) work 1} -P _{(TD) line 5} , wherein, P _{(GSM) line 5} is the attenuation of GSM signal on the feeder 5, P _{( TD) line 5} is the attenuation of the TD signal on the feeder line 5.

The seventh attenuation: the frequency attenuation of the GSM signal and the TD signal on the power divider 2. At this time, the signal strength of the GSM signal after the frequency attenuation of the power divider 2 is: P _{(GSM) source} -P _{(GSM ) line 1} -P _{(GSM) combined} -P _{(GSM) line 3} -P _{(GSM) work 1} -P _{(GSM) line 5} -P _{(GSM) work 2} ; for the signal strength when the TD signal arrives at the combiner is : P _{(TD) source} -P _{(TD) line 2} -P _{(TD) combined} -P _{(TD) line 3} -P _{(TD) work 1} -P _{(TD) line 5} -P _{(TD) work 2} , where, P _{(GSM) work 2} is the frequency attenuation of the GSM signal on the power divider 2; P _{(TD) work 2} is the frequency attenuation of the TD signal on the power divider 2.

Eighth attenuation: GSM signal and TD signal are transmitted to antenna point 2 through feeder 6. At this time, the GSM signal strength on antenna point 2 is: P _{(GSM) source} -P _{(GSM) line 1} -P _{(GSM) combination} -P _{(GSM) line 3} -P _{(GSM) power 1} -P _{(GSM) line 5} -P _{(GSM) power 2} -P _{(GSM) line 6} , TD signal strength is: P _{(TD) source} -P _{(TD ) line 2} -P _{(TD) combined} -P _{(TD) line 3} -P _{(TD) work 1} -P _{(TD) line 5} -P _{(TD) work 2} -P _{(TD) line 6} .

In the same way, the GSM signal and the TD signal are transmitted to the antenna point 3 through the feeder 7. At this time, the GSM signal strength on the antenna point 2 is: P _{(GSM) source} -P _{(GSM) line 1} -P _{(GSM) combination} -P _{( GSM) line 3} -P _{(GSM) line 1} -P _{(GSM) line 5} -P _(GSM ) line ₂ -P _{(GSM) line 7} , TD signal strength is: P _{(TD) source} -P _{(TD) line 2} -P _(TD) together -P _{(TD) line 3} -P _{(TD) work 1} -P _{(TD) line 5} -P _{(TD) work 2} -P _{(TD) line 7} .

Through the above-mentioned frequency attenuation, the fixed deviation value between the GSM signal and the TD signal on the antenna point 1 is: _PM1 =(P _{(GSM) source} -P _{(GSM) line 1} -P _{(GSM) combination} -P _{( GSM) line 3} -P _{(GSM) work 1} -P _{(GSM) line 4} )-(P _{(TD) source} -P _{(TD) line 2} -P _{(TD) combined} -P _{(TD) line 3} -P _{(TD ) work 1} -P _{(TD) line 4} );

The fixed deviation value between the GSM signal and the TD signal on the antenna point 2 is: _PM2 = (P _{(GSM) source} - P _{(GSM) line 1} - P _{(GSM) combined -} P _{(GSM) line 3} -P _{( GSM) work 1} -P _{(GSM) line 5} -P _{(GSM) work 2} -P _{(GSM) line 6} )-(P _{(TD) source} -P _{(TD) line 2} -P _(TD) close-P _{(TD ) line 3} -P _{(TD) work 1} -P _{(TD) line 5} -P _{(TD) work 2} -P _{(TD) line 6} );

The fixed deviation value between the GSM signal and the TD signal on the antenna point 3 is: _PM3 = (P _{(GSM) source -} P _{(GSM) line 1} - P _{(GSM) combined} - P _{(GSM) line 3} -P _{( GSM) work 1} -P _{(GSM) line 5} -P _{(GSM) work 2} -P _{(GSM) line 7} )-(P _{(TD) source} -P _{(TD) line 2} -P _(TD) close-P _{(TD ) line 3} -P _{(TD) work 1} -P _{(TD) line 5} -P _{(TD) work 2} -P _{(TD) line 7} );

In this way, a one-to-one correspondence relationship is formed between P _M1 , P _M2 , P _M3 and antenna point 1, antenna point 2, and antenna point 3, and such a one-to-one correspondence relationship will be added to the preset first preset list, The antenna point 1, the antenna point 2, and the antenna point 3 all correspond to their respective position information. Of course, in the above example, only a relatively simple indoor distribution system is given to illustrate the fixed deviation values on antenna point 1, antenna point 2, and antenna point 3. In practical applications, the structure of some indoor systems can be more complicated. There may also be various types of network signals to be transmitted, and in practical applications, the more complex the structure of the indoor distribution system is, the more obvious the differences in the obtained fixed offset values corresponding to each antenna point will be.

Based on the one-to-one correspondence between the fixed deviation values of different network signals and the antenna point positions, the user terminal can be accurately positioned. The operation process is shown in Figure 3, and the details are as follows:

S301. Obtain the signal strength of the first network signal received by the user terminal under the antenna point and the signal strength of the second network signal received, and determine the signal strength between the signal strength of the first network signal and the signal strength of the second network signal Deviation;

S302. Match the deviation value with the fixed deviation value in the first preset list that stores the correspondence between the fixed deviation value and the antenna point;

S303. If the deviation value of the user terminal matches a fixed deviation value in the first preset list, locate the position information of the antenna point corresponding to the fixed deviation value as the position information of the user terminal.

Specifically, the one-to-one correspondence between fixed offset values and antenna points has been illustrated in the above-mentioned embodiments, so as long as the offset values between the signal strengths of the various networks of the user terminal are obtained, it is possible to directly locate Find out which antenna point the user terminal is under, so that the specific location of the user terminal can be located.

For example: if it is detected in an indoor distribution system that the signal strength of the first network signal corresponding to the user terminal is M ₁ , that is: the signal strength of the GSM network is M ₁ ; the signal strength of the second network signal is M ₂ , that is: The signal strength of the TD network is M ₂ , and the deviation value between the GSM network signal and the TD network signal can be determined at this time, that is, the deviation value is P ₀ =M ₁ -M ₂ , and then the obtained deviation value P ₀ and The fixed offset values in the saved preset list (shown in Table 1) are matched.

fixed offset antenna point P _M1 Antenna point 1 P _M2 Antenna point 2 P _M3 Antenna Point 3

Table 1

If the deviation value P0 corresponding to the user terminal matches the fixed deviation value P _M1 corresponding to the antenna point ₁ , it is determined that the user terminal is in the position corresponding to the antenna point 1, so that the user terminal can be more accurately located in the indoor environment. In the area covered by point 1.

In addition, in order to further improve the positioning accuracy of the user terminal in the embodiment of the present invention, after locating the antenna point where the user terminal is located in the embodiment of the present invention, further accurate positioning of the user terminal is realized through multipath effects . Among them, the method of accurately positioning the user terminal through the multipath effect is as follows:

method one:

First, when the user terminal is under a certain antenna point, the network signal at the antenna point can be transmitted to the user terminal through different paths, such as shown in Figure 4, in Figure 4, the network signal at the antenna point can be transmitted through three different paths To the user terminal, path 1 is a straight line transmission path, path 2 is a transmission path that undergoes one reflection, and path 3 is a transmission path that undergoes two reflections. Because the network signal will have frequency attenuation after reflection, and different transmission paths will cause delays between network signals. Of course, the delays of different paths are different, so the signal strength and delay corresponding to the three paths are different. , the corresponding signal strength and time delay in the three paths form the characteristic envelope of the user terminal at the current location, and the parameters of the characteristic envelope are shown in FIG. 5 .

Of course, when the user terminal under the antenna point is in different positions, the corresponding characteristic envelopes of the user terminal will be different, so as long as the characteristic envelope of the user terminal under the antenna point is obtained, the user terminal can be accurately identified. The location of the terminal is located.

In order to accurately locate the position of the user terminal under the antenna point, it is necessary to collect the characteristic envelope of each position under the antenna point in advance, and then establish a corresponding relationship between the coordinate position of the user terminal relative to the antenna point and the characteristic envelope . Here, the coordinate position of the user terminal is the coordinate position of the user terminal relative to the antenna point, which can be determined as shown in Figure 6. In Figure 6, the antenna point is used as the coordinate origin to establish a coordinate system, through which the coordinate system Then the area covered by the antenna point and the characteristic envelope corresponding to each position coordinate in the covered area can be determined. The corresponding relationship between the finally obtained coordinate position and the feature envelope is shown in Table 2:

Coordinate position feature envelope (X ₁ , Y ₁ ) Feature Envelope 1 (X ₂ , Y ₂ ) Feature Envelope 2 (X ₃ , Y ₃ ) Feature Envelope 3

Table 2

The content stored in Table 2 shows that as long as the characteristic envelope of the user terminal under the antenna point is acquired, the accurate position of the user terminal relative to the antenna point can be located based on the characteristic envelope.

Method 2:

If the structure diagram of the entire building and the distribution of antenna points on each floor can be obtained in advance, it can also be simulated through the ray tracing model, so that the distribution diagram of the signal strength in each floor can be obtained. In the signal strength distribution diagram , the signal strength of the position closer to the antenna point is stronger, and the signal strength of the position farther from the antenna point is weaker. After obtaining the distribution map of the signal strength, after obtaining the characteristic envelope of the user terminal under the antenna point, based on The distribution diagram of the signal strength determines the specific position of the user terminal relative to the antenna point, so that more accurate positioning of the user terminal can also be realized.

In addition, in the embodiment of the present invention, method 1 and method 2 can be used in combination. Specifically, if the structural diagram of the entire building and the distribution of antenna points on each floor can be obtained in advance, the ray tracing model can be used first to Perform simulation to obtain the distribution map of signal strength in each layer, and then based on such a distribution map, you can manually locate the location where user terminals appear more frequently in each layer, that is, through manual collection, and then collect the collected results It is stored in the background server, so that the location where the user terminal frequently appears can be more accurately located.

Of course, in the embodiment of the present invention, it is not limited to only use the above-mentioned method to achieve accurate positioning under the antenna point, as long as it is a technology obtained by those skilled in the art based on the above-mentioned idea in the embodiment of the present invention and without creative work Schemes are all within the scope of the present invention.

An indoor positioning method provided in an embodiment of the present invention determines the first network signal by obtaining the signal strength of the first network signal received by the user terminal under the antenna point and the signal strength of the second network signal received The deviation value between the signal strength of the signal strength of the second network signal and the signal strength of the second network signal, and the deviation value obtained is matched with the fixed deviation value in the first preset list in which the corresponding relationship between the fixed deviation value and the antenna point is saved. If the user terminal When the corresponding offset value matches a fixed offset value in the first preset list, the location information of the antenna point corresponding to the matched fixed offset value is positioned as the location information of the user terminal. That is to say, in the embodiment of the present invention, when the indoor positioning of the user terminal is performed, no specific equipment needs to be installed, but the current wireless communication network is combined, and then the location of the user terminal is located based on the signal strength of the network signal received by the user terminal. This not only reduces the cost of locating the user terminal indoors, but also improves the accuracy of locating the user terminal in the indoor environment to a certain extent.

In addition, in the embodiment of the present invention, after the antenna point where the user terminal is located is determined, the feature envelope of the user terminal will be further acquired, and the acquired feature envelope will be matched with the fixed features in the second preset list. When the acquired feature envelope matches the fixed feature envelope in the second preset list, the current location information corresponding to the matched fixed feature envelope is determined as the location information of the user terminal, where the feature envelope is the user terminal The received signal strengths and signal delays corresponding to the first network signal and the second network signal sent through different paths, that is, the specific position of the user terminal under the antenna point can be accurately located through the characteristic envelope.

Embodiment two:

An indoor positioning system is also provided in an embodiment of the present invention, as shown in FIG. 7 , which is a schematic structural diagram of an indoor positioning system in an embodiment of the present invention. The system includes:

The first obtaining module 701 is configured to obtain the signal strength of the first network signal received by the user terminal under the antenna point and the signal strength of the second network signal received, and determine the difference between the signal strength of the first network signal and the second network signal The deviation value between the signal strengths of network signals;

A matching module 702, configured to match the offset value with the fixed offset value in the first preset list that stores the correspondence between the fixed offset value and the antenna point;

The processing module 703 is configured to, if the offset value of the user terminal matches a fixed offset value in the first preset list, position the position information of the antenna point corresponding to the fixed offset value as the location information of the user terminal location information.

Further, as shown in FIG. 8, the indoor positioning system in the embodiment of the present invention further includes:

The second acquiring module 801 is configured to acquire a fixed offset value of each antenna point in the indoor distribution system, where the fixed offset value is the difference between the strength of the first network signal transmitted by the antenna point and the intensity of the first network signal transmitted by the antenna point the difference between the signal strengths of the second network signal;

A generation module 802, the generation module 802 is connected with the matching module 702, and is used to determine the position information of each antenna point in the indoor distribution system, and generate and save the position information of the antenna point and the antenna point The first preset list of corresponding fixed offset values.

Further, in the embodiment of the present invention, the second obtaining module 801 is also used to obtain the current location information of the user terminal in the area covered by the antenna point, and obtain a fixed feature envelope corresponding to the current location information, the fixed feature envelope contains the signal strength and signal delay corresponding to the first network signal and the second network signal received by the user terminal and sent through different paths;

The generating module 802 is further configured to generate a second preset list storing the current location information of the user terminal and the fixed feature envelope corresponding to the current location information.

Based on the indoor positioning system shown in Figure 8, the processing module 703 in the embodiment of the present invention includes:

An acquiring unit, configured to acquire the feature envelope of the user terminal if the deviation value of the user terminal matches a fixed deviation value in the first preset list;

a matching unit, configured to match the acquired feature envelope with the fixed feature envelope in the second preset list;

A determining unit, configured to determine the current location information corresponding to the matched fixed feature envelope as the location of the user terminal if the acquired feature envelope matches a fixed feature envelope in the second preset list information.

Embodiment three:

The embodiment of the present invention also provides an indoor positioning device. FIG. 9 is a schematic structural diagram of an indoor positioning device in the embodiment of the present invention. The device includes:

The sensor 901 is configured to acquire the signal strength of the first network signal received by the user terminal under the antenna point and the signal strength of the second network signal received;

The processor 902 is configured to determine a deviation value between the signal strength of the first network signal and the signal strength of the second network signal, and compare the deviation value with the first preset that stores the correspondence between the fixed deviation value and the antenna point. The fixed offset value in the list is set to match, and if the offset value of the user terminal matches a fixed offset value in the first preset list, the position information of the antenna point corresponding to the fixed offset value is positioned as the location information of the user terminal.

Further, in the embodiment of the present invention, the sensor 901 is also used to obtain a fixed deviation value of each antenna point in the indoor distribution system, and the fixed deviation value is the strength of the first network signal transmitted by the antenna point The difference between the signal strength and the signal strength of the second network signal transmitted by the antenna point;

The processor 902 is further configured to determine the location information of each antenna point in the indoor distribution system, and generate the first fixed offset value that stores the location information of the antenna point and the antenna point. Default list.

Further, in the embodiment of the present invention, the sensor 901 is also used to obtain the current location information of the user terminal in the area covered by the antenna point, and obtain the fixed feature envelope corresponding to the current location information, the fixed feature envelope includes The signal strength and signal delay corresponding to the first network signal and the second network signal received by the user terminal and sent through different paths;

The processor 902 is further configured to generate a second preset list storing the current location information of the user terminal and the fixed feature envelope corresponding to the current location information.

Further, in the embodiment of the present invention, the processor 902 is further configured to obtain the feature envelope of the user terminal if the deviation value of the user terminal matches a fixed deviation value in the first preset list, and set The acquired feature envelope is matched with a fixed feature envelope in the second preset list, and if the acquired feature envelope matches a fixed feature envelope in the second preset list, the matched The current location information corresponding to the fixed feature envelope is determined as the location information of the user terminal.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

While preferred embodiments of the invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention also intends to include these modifications and variations.

Claims (12)

1. A method for indoor positioning, characterized in that, in the indoor distribution system, the antenna points in the indoor distribution system are distributed in different indoor positions, and the method comprises: Obtain the signal strength of the first network signal received by the user terminal under the antenna point and the signal strength of the second network signal received, and determine the signal strength between the signal strength of the first network signal and the signal strength of the second network signal Deviation; Matching the offset value with the fixed offset value in the first preset list that stores the correspondence between the fixed offset value and the antenna point; If the offset value of the user terminal matches a fixed offset value in the first preset list, position the location information of the antenna point corresponding to the fixed offset value as the location information of the user terminal. 2. The method according to claim 1, further comprising: before obtaining the signal strength of the first network signal received by the user terminal under the antenna point and the signal strength of the second network signal received Obtaining a fixed offset value of each antenna point in the indoor distribution system, the fixed offset value being the strength of the first network signal emitted by the antenna point and the signal strength of the second network signal emitted by the antenna point difference between intensities; Determine the position information of each antenna point in the indoor distribution system, and generate the first preset list storing the fixed offset value corresponding to the position information of the antenna point and the antenna point. 3. The method according to claim 1, further comprising: before acquiring the signal strength of the first network signal received by the user terminal under the antenna point and the signal strength of the second network signal received: Obtain the location information of the current location of the user terminal in the area covered by the antenna point, and obtain the fixed feature envelope of the user terminal at the current location, the fixed feature envelope includes the information received by the user terminal through different The signal strength and signal delay corresponding to the first network signal and the second network signal sent by the path; and generating a second preset list storing the location information of the user terminal and the fixed feature envelope corresponding to the location information. 4. The method according to claim 3, wherein if the deviation value of the user terminal matches a fixed deviation value in the first preset list, the antenna point corresponding to the fixed deviation value The location information location is the location information of the user terminal, including: If the offset value of the user terminal matches a fixed offset value in the first preset list, acquire the feature envelope of the user terminal; matching the acquired feature envelope with the fixed feature envelope in the second preset list; If the acquired feature envelope matches a fixed feature envelope in the second preset list, determine the location information corresponding to the matched fixed feature envelope as the location information of the user terminal. 5. A system for indoor positioning, comprising: The first acquisition module is configured to acquire the signal strength of the first network signal received by the user terminal under the antenna point and the signal strength of the second network signal received, and determine the signal strength of the first network signal and the second network signal The deviation value between the signal strengths of the signals; A matching module, configured to match the deviation value with the fixed deviation value in the first preset list that stores the correspondence between the fixed deviation value and the antenna point; A processing module, configured to position the position information of the antenna point corresponding to the fixed deviation value as the position of the user terminal if the deviation value of the user terminal matches a fixed deviation value in the first preset list information. 6. The system of claim 5, further comprising: The second acquisition module is configured to acquire a fixed offset value of each antenna point in the indoor distribution system, where the fixed offset value is the difference between the strength of the first network signal transmitted by the antenna point and the intensity of the first network signal transmitted by the antenna point The difference between the signal strengths of the second network signal; A generation module, configured to determine the position information of each antenna point in the indoor distribution system, and generate the first preset that saves the fixed deviation value corresponding to the position information of the antenna point and the antenna point list. 7. The system according to claim 6, wherein the second obtaining module is further configured to obtain the location information of the current location of the user terminal in the area covered by the antenna point, and obtain the location information of the current location of the user terminal in the area covered by the antenna point. A fixed characteristic envelope at the location, the fixed characteristic envelope includes signal strengths and signal delays corresponding to the first network signal and the second network signal received by the user terminal and sent through different paths; The generating module is further configured to generate a second preset list storing the current location information of the user terminal and the fixed feature envelope corresponding to the current location information. 8. The system according to claim 7, wherein the processing module comprises: An acquiring unit, configured to acquire the feature envelope of the user terminal if the deviation value of the user terminal matches a fixed deviation value in the first preset list; a matching unit, configured to match the acquired feature envelope with the fixed feature envelope in the second preset list; A determining unit, configured to determine the current location information corresponding to the matched fixed feature envelope as the location of the user terminal if the acquired feature envelope matches a fixed feature envelope in the second preset list information. 9. An indoor positioning device, characterized in that it comprises: The sensor is configured to obtain the signal strength of the first network signal received by the user terminal under the antenna point and the signal strength of the second network signal received; a processor, configured to determine a deviation value between the signal strength of the first network signal and the signal strength of the second network signal, and compare the deviation value with a first preset that stores a correspondence between a fixed deviation value and an antenna point The fixed offset value in the list is matched, and if the offset value of the user terminal matches a fixed offset value in the first preset list, the position information of the antenna point corresponding to the fixed offset value is positioned as the Location information of the user terminal. 10. The device according to claim 9, wherein the sensor is further used to acquire a fixed deviation value of each antenna point in the indoor distribution system, the fixed deviation value being the antenna point The difference between the strength of the transmitted first network signal and the signal strength of the second network signal transmitted by the antenna point; The processor is further configured to determine the position information of each antenna point in the indoor distribution system, and generate the first fixed offset value that stores the position information of the antenna point and the antenna point a preset list. 11. The device according to claim 9, wherein the sensor is further used to obtain the location information of the current location of the user terminal in the area covered by the antenna point, and obtain the location information of the user terminal at the current location. a fixed characteristic envelope, wherein the fixed characteristic envelope includes signal strengths and signal delays corresponding to the first network signal and the second network signal received by the user terminal and sent through different paths; The processor is further configured to generate a second preset list storing the current location information of the user terminal and the fixed feature envelope corresponding to the current location information. 12. The device according to claim 11, wherein the processor is further configured to, if the deviation value of the user terminal matches a fixed deviation value in the first preset list, obtain the user terminal The feature envelope of the terminal, matching the acquired feature envelope with a fixed feature envelope in the second preset list, if the acquired feature envelope matches a fixed feature envelope in the second preset list When matching, determine the current location information corresponding to the matched fixed feature envelope as the location information of the user terminal.