CN104320847A - Low-power-consumption positioning method and system based on adjacency sensing and mobile base station - Google Patents

Abstract

The invention discloses a low-power positioning method and system based on proximity sensing and a mobile base station. The method includes: acquiring a user's position, querying a nearby base station through a mobile base station GSM, and calculating the current position of the user; peripheral equipment detection , the mobile terminal periodically turns on the bluetooth sensor, scans the peripheral devices, detects whether there are other bluetooth devices around, and if so, starts the pairing mechanism and automatically connects to the available bluetooth devices; location sharing, respectively transmit their last positioning through bluetooth information, compare the positioning accuracy of the mobile terminal and the Bluetooth device according to the positioning information, if the positioning accuracy of the Bluetooth device is higher than that of the mobile terminal, the mobile terminal updates the positioning information, otherwise the positioning information of the mobile terminal remains unchanged. The invention uses low-power mobile base stations GSM and Bluetooth sensors for positioning, and uses the method of position sharing to reduce the frequency of using the positioning module and reduce the overall positioning power consumption.

Description

Low power consumption positioning method and system based on proximity sensing and mobile base station

technical field

The invention relates to the technical field of GPS positioning, in particular to a low-power positioning method and system based on proximity sensing and mobile base stations.

Background technique

Location-Based Services (LBS) is an important part of the mobile Internet industry, which has spawned continuous innovation and popularization of target positioning, tracking and tracking technologies and markets. At present, the positioning system based on GPS technology and the second generation of Beidou has been widely used in vehicle positioning and navigation terminals, smart phones and emerging wearable devices.

GPS positioning mainly includes two parts: one is the user receiver, and the other is the GPS satellite constellation. The satellite constellation continuously broadcasts satellite signals, and the user receiver can calculate the current position after receiving more than 4 effective satellite signals.

At present, wearable devices such as vehicle-mounted positioning systems, smart phones, smart watches, smart glasses, and smart bracelets all need to integrate positioning modules to provide location services. Usually, various products will integrate GPS systems, which can provide about 10 meters Positioning accuracy service.

However, the power consumption of the GPS module and the Beidou module is very large, about 160mW, which is second only to the screen and 3G communication module in the smart terminal. Experiments have shown that smart phones can only provide continuous GPS positioning services for 5-6 hours, and the latest smart watches can only provide GPS positioning services for about 2-3 hours, which is difficult to meet the long-term positioning needs of users.

Therefore, in view of the above technical problems, it is necessary to provide a low-power positioning method and system based on proximity sensing and mobile base stations.

Contents of the invention

In view of this, the present invention provides a low-power positioning method and system based on proximity sensing and mobile base stations. The present invention mainly uses some low-power sensors (such as Bluetooth and GSM mobile base stations) to complete positioning and provide location services. Specifically, use the mobile base station to obtain the user's location, and design a positioning mechanism based on proximity sharing, that is, turn on the Bluetooth module to detect whether there is an available Bluetooth module in the surrounding area, and if so, decide whether to acquire the device according to the location sharing mechanism location information.

In order to achieve the above object, the technical solutions provided by the embodiments of the present invention are as follows:

A low-power positioning method based on proximity sensing and mobile base stations, the method comprising:

S1. Obtain the user's location, query the nearby base stations through the mobile base station GSM, and calculate the current location of the user;

S2. Peripheral device detection, the mobile terminal periodically turns on the Bluetooth sensor, scans the peripheral devices, detects whether there are other Bluetooth devices around, and if so, starts the pairing mechanism and automatically connects to the available Bluetooth devices;

S3, location sharing, obtain the bluetooth device that matches the current mobile terminal, respectively transmit their last positioning information through bluetooth, and compare the positioning accuracy of the mobile terminal and the bluetooth device according to the positioning information, if the positioning accuracy of the bluetooth device is higher than that of the mobile terminal, the mobile terminal updates the location information; otherwise, the location information of the mobile terminal remains unchanged.

As a further improvement of the present invention, there are 3 or more base stations in the step S1.

As a further improvement of the present invention, there are three base stations in the step S1, and the step S1 is specifically:

The mobile base station GSM queries the numbers and positions of the three nearby base stations (p ₁ , p ₂ , p ₃ );

The mobile terminal obtains the signal propagation time (t ₁ , t ₂ , t ₃ ) of the three base stations, multiplies it by the speed of light to obtain the distance from the receiver to each base station (l ₁ , l ₂ , l ₃ ), and satisfies the relationship l _i = ct _i , where c is the speed of light;

Using the position relationship equations of the three base stations $\left\{\begin{array}{c}\mathrm{dist}(p,p_1)=l_1\\ \mathrm{dist}(p,p_2)=l_2\\ \mathrm{dist}(p,p_3)=l_3\end{array}\right.,$ dist is a function for calculating the distance, and the coordinates P(x, y, z) of the user's current position are calculated.

As a further improvement of the present invention, the location information in step S3 includes location information, location source and time stamp information.

As a further improvement of the present invention, the location information includes longitude information and latitude information.

As a further improvement of the present invention, the location source includes GPS and GSM.

As a further improvement of the present invention, the step S3 is specifically:

Compare the positioning accuracy of the mobile terminal and the Bluetooth device according to the location source and time stamp information. If the location source accuracy of the Bluetooth device is higher than that of the mobile terminal, and/or the time stamp information of the Bluetooth device is newer, the mobile terminal updates the positioning information. Otherwise, the positioning information of the mobile terminal remains unchanged.

Correspondingly, a low-power positioning system based on proximity sensing and mobile base stations, the system includes:

The user location acquisition module queries the nearby base stations through the mobile base station GSM, and calculates the current location of the user;

Peripheral device detection module, the mobile terminal periodically turns on the Bluetooth sensor, scans the peripheral devices, detects whether there are other Bluetooth devices around, and if so, starts the pairing mechanism and automatically connects to the available Bluetooth devices;

The location sharing module obtains the Bluetooth device that matches the current mobile terminal, transmits their last positioning information through Bluetooth, and compares the positioning accuracy of the mobile terminal and the Bluetooth device according to the positioning information. If the positioning accuracy of the Bluetooth device is higher than that of the mobile terminal , the mobile terminal updates the location information, otherwise the location information of the mobile terminal remains unchanged.

The present invention has the following beneficial effects:

Use low-power mobile base station GSM and Bluetooth sensors for positioning, which can reduce the overall positioning power consumption;

The location sharing method can reduce the frequency of using the positioning module and further reduce the overall positioning power consumption.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments described in the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a flow chart of a low-power positioning method based on proximity sensing and a mobile base station of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

Referring to Figure 1, the present invention discloses a low-power positioning method based on proximity sensing and mobile base stations, including:

S1. Obtain the user's location, query the nearby base stations through the mobile base station GSM, and calculate the current location of the user;

S2. Peripheral device detection, the mobile terminal periodically turns on the Bluetooth sensor, scans the peripheral devices, detects whether there are other Bluetooth devices around, and if so, starts the pairing mechanism and automatically connects to the available Bluetooth devices;

S3, location sharing, obtain the bluetooth device that matches the current mobile terminal, respectively transmit their last positioning information through bluetooth, and compare the positioning accuracy of the mobile terminal and the bluetooth device according to the positioning information, if the positioning accuracy of the bluetooth device is higher than that of the mobile terminal, the mobile terminal updates the location information; otherwise, the location information of the mobile terminal remains unchanged.

Correspondingly, the present invention also discloses a low-power positioning system based on proximity sensing and mobile base stations, including:

The user location acquisition module queries the nearby base stations through the mobile base station GSM, and calculates the current location of the user;

Peripheral device detection module, the mobile terminal periodically turns on the Bluetooth sensor, scans the peripheral devices, detects whether there are other Bluetooth devices around, and if so, starts the pairing mechanism and automatically connects to the available Bluetooth devices;

The location sharing module obtains the Bluetooth device that matches the current mobile terminal, transmits their last positioning information through Bluetooth, and compares the positioning accuracy of the mobile terminal and the Bluetooth device according to the positioning information. If the positioning accuracy of the Bluetooth device is higher than that of the mobile terminal , the mobile terminal updates the location information, otherwise the location information of the mobile terminal remains unchanged.

The present invention mainly solves the power consumption problem of the actual GPS positioning process, uses a sensor device with low power consumption to provide location services, and simultaneously adds a proximity sensing and sharing function based on a Bluetooth sensor.

The present invention mainly consists of three modules: location acquisition, peripheral device detection and location sharing, benefiting from the huge number of intelligent terminals (such as smart phones, wearable devices, etc.) in the whole city, this sharing function has a great chance to reduce the number of GSM location acquisition modules usage of.

The method for positioning with low power consumption based on proximity sensing and mobile base stations of the present invention will be further described below in combination with a specific embodiment.

S1. Obtaining the location of the user, querying the nearby base stations through the mobile base station GSM, and calculating the current location of the user.

The mobile base station GSM first calls the internal API function of the mobile terminal to query the numbers and positions (p ₁ , p ₂ , p ₃ ) of the three nearby base stations. The specific API functions are:

CellID = GetCurrentCellID();

Position = GetPosition(CellID);

Then use the time-of-arrival method and use the location information of at least three base stations to find the user's current location. In this embodiment, three base stations are taken as an example, and the specific positioning method is as follows:

The mobile terminal obtains the signal propagation time (t ₁ , t ₂ , t ₃ ) of the three base stations, multiplies it by the speed of light to obtain the distance from the receiver to each base station (l ₁ , l ₂ , l ₃ ), and satisfies the relationship l _i = ct _i , where c is the speed of light;

Using the position relationship equations of the three base stations $\left\{\begin{array}{c}\mathrm{dist}(p,p_1)=l_1\\ \mathrm{dist}(p,p_2)=l_2\\ \mathrm{dist}(p,p_3)=l_3\end{array}\right.,$ dist is a function for calculating the distance, and the coordinates P(x, y, z) of the user's current position are calculated.

S2. Peripheral device detection, the mobile terminal periodically turns on the Bluetooth sensor, scans the peripheral devices, detects whether there are other Bluetooth devices around, and if so, starts the pairing mechanism and automatically connects to the available Bluetooth devices.

S3, location sharing, obtain the bluetooth device that matches the current mobile terminal, respectively transmit their last positioning information through bluetooth, and compare the positioning accuracy of the mobile terminal and the bluetooth device according to the positioning information, if the positioning accuracy of the bluetooth device is higher than that of the mobile terminal, the mobile terminal updates the location information; otherwise, the location information of the mobile terminal remains unchanged.

In this embodiment, the location information includes location information, location source and time stamp information. Preferably, the location information includes longitude information and latitude information; location sources include GPS and GSM.

The format of shared positioning information data is (location, source, time)

Compare the positioning accuracy of mobile terminals and Bluetooth devices based on location sources and timestamp information:

If the accuracy of the location source of the Bluetooth device is higher than that of the mobile terminal, or the time stamp information of the Bluetooth device is newer, the mobile terminal updates the location information; otherwise, the location information of the mobile terminal remains unchanged and waits to jump to the next location acquisition. Specifically:

If destination.source==GPS or destination.time>this.time

this.location=destination.location

goto Step S1

As can be seen from the above embodiments, the present invention has the following beneficial effects:

Use low-power mobile base station GSM and Bluetooth sensors for positioning, which can reduce the overall positioning power consumption;

The location sharing method can reduce the frequency of using the positioning module and further reduce the overall positioning power consumption.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (8)

1. A low-power positioning method based on proximity sensing and mobile base stations, characterized in that the method comprises: S1. Obtain the user's location, query the nearby base stations through the mobile base station GSM, and calculate the current location of the user; S2. Peripheral device detection, the mobile terminal periodically turns on the Bluetooth sensor, scans the peripheral devices, detects whether there are other Bluetooth devices around, and if so, starts the pairing mechanism and automatically connects to the available Bluetooth devices; S3, location sharing, obtain the bluetooth device that matches the current mobile terminal, respectively transmit their last positioning information through bluetooth, and compare the positioning accuracy of the mobile terminal and the bluetooth device according to the positioning information, if the positioning accuracy of the bluetooth device is higher than that of the mobile terminal, the mobile terminal updates the location information; otherwise, the location information of the mobile terminal remains unchanged. 2. The method according to claim 1, characterized in that there are 3 or more base stations in the step S1. 3. The method according to claim 2, wherein there are three base stations in the step S1, and the step S1 is specifically: The mobile base station GSM queries the numbers and positions of the three nearby base stations (p ₁ , p ₂ , p ₃ ); The mobile terminal obtains the signal propagation time (t ₁ , t ₂ , t ₃ ) of the three base stations, multiplies it by the speed of light to obtain the distance from the receiver to each base station (l ₁ , l ₂ , l ₃ ), and satisfies the relationship l _i = ct _i , where c is the speed of light; Using the position relationship equations of the three base stations $\left\{\begin{array}{c}\mathrm{dist}(p,p_1)=l_1\\ \mathrm{dist}(p,p_2)=l_2\\ \mathrm{dist}(p,p_3)=l_3\end{array}\right.,$ dist is a function for calculating the distance, and the coordinates P(x, y, z) of the user's current position are calculated. 4. The method according to claim 1, wherein the location information in step S3 includes location information, location source and time stamp information. 5. The method according to claim 4, wherein the location information includes longitude information and latitude information. 6. The method according to claim 4, wherein the location source comprises GPS, GSM. 7. The method according to claim 4, wherein the step S3 is specifically: Compare the positioning accuracy of the mobile terminal and the Bluetooth device according to the location source and time stamp information. If the location source accuracy of the Bluetooth device is higher than that of the mobile terminal, and/or the time stamp information of the Bluetooth device is newer, the mobile terminal updates the positioning information. Otherwise, the positioning information of the mobile terminal remains unchanged. 8. A low-power positioning system based on proximity sensing and mobile base stations as claimed in claim 1, wherein the system comprises: The user location acquisition module queries the nearby base stations through the mobile base station GSM, and calculates the current location of the user; Peripheral device detection module, the mobile terminal periodically turns on the Bluetooth sensor, scans the peripheral devices, detects whether there are other Bluetooth devices around, and if so, starts the pairing mechanism and automatically connects to the available Bluetooth devices; The location sharing module obtains the Bluetooth device that matches the current mobile terminal, transmits their last positioning information through Bluetooth, and compares the positioning accuracy of the mobile terminal and the Bluetooth device according to the positioning information. If the positioning accuracy of the Bluetooth device is higher than that of the mobile terminal , the mobile terminal updates the location information, otherwise the location information of the mobile terminal remains unchanged.