CN102316478B - Method for calculating current position, method for preventing communication device from being stolen and communication device - Google Patents

Abstract

The invention relates to a method for calculating a current position, a method for preventing a communication device from being stolen and the communication device. The method for calculating the current position is suitable for the communication device registered in a service base station and comprises the following steps. A serving base station and at least N neighboring base stations are grouped into a first base station group. When the communication device moves, the received signal strength corresponding to each base station in the first base station group is respectively detected, and K base stations with increased received signal strength form a second base station group, wherein K is more than or equal to 2 and less than or equal to N. The method comprises the steps of sequentially determining N-K intersection areas from N base stations to K +1 base stations in the second base station group, and deducting the N-K intersection areas from a first intersection area obtained by K base stations in the second base station group to obtain the current area of the communication device. By the technical scheme of the invention, the communication device is favorable for tracking and retrieving when being lost.

Description

Method for calculating current position, method for preventing communication device from being stolen, and communication device

technical field

The invention relates to a method for calculating the current position, in particular to a method for calculating the current position of a communication device, a method for preventing theft of the communication device and a communication device.

Background technique

At present, most electronic devices are developing toward the direction of light, thin and small, but once lost, it is difficult for the original user to find them back. Even if the electronic device has a Global Positioning System (Global Positioning System, referred to as: GPS) function to locate the current location, or continuously record the current travel path, when the person who picks up or steals the lost electronic device, it will be taken as his own and When the electronic device is turned off, it is more difficult to find the lost electronic device. In addition, the GPS function is likely to interfere with the positioning accuracy indoors or in bad weather conditions, making it relatively less likely to use the GPS function alone to track or retrieve lost electronic devices.

Contents of the invention

The invention provides a method for calculating the current position, a method for preventing the theft of a communication device and a communication device. The method for calculating the current location determines the current area of the communication device according to the variation of the received signal strength between the communication device and the adjacent base stations when the communication device is traveling. In addition, the current area is continuously recorded as a traveling path, and the current area or traveling path is properly reported to a remote device, so as to track and retrieve the communication device.

An embodiment of the present invention provides a method for calculating a current location, which is applicable to a communication device registered in a serving base station. The method for calculating the current location includes the following steps. A first base station group is formed by at least N neighboring base stations adjacent to the serving base station and the serving base station. When the communication device moves, respectively detect the received signal strength corresponding to each base station in the first base station group, and form K base stations with increased received signal strength into a second base station group, where 2≤ K≤N. Sequentially determine when the second base station group has N base stations to the N-K intersection areas when the second base station group has K+1 base stations, and determine when the second base station group has K base stations The N-K intersection areas are subtracted from the obtained first intersection area to obtain a current area of the communication device.

In the above-mentioned second base station group, the first base station and the second base station that have a maximum angle between each other with the initial position of the communication device as the axis are determined. The serving base station, the first base station and the second base station are respectively used as the first circle center, the second circle center and the third circle center. Obtain the corresponding first radius, second radius and third radius according to the received signal strengths of the serving base station, the first base station and the second base station respectively, and select the multiple centers formed by these circle centers and the corresponding radii An intersection of circular areas is the above-mentioned first intersection area. When the serving base station changes, the first base station group and the second base station group are updated. When the communication device moves again, the above-mentioned current area is set as the initial position for calculating the current position next time.

In an embodiment of the present invention, when the number of base stations with increased received signal strength K=2, the above method for calculating the current location further includes the following steps. Taking a third base station closest to the first base station outside the second base station group as the fourth center, obtain the corresponding fourth radius according to the received signal strength of the third base station, and select the first center, the second The intersection of multiple circular areas formed by the center of the circle, the fourth center of the circle and the corresponding radii is the second intersection area. Taking a fourth base station closest to the second base station outside the second base station group as the fifth center, obtain the corresponding fifth radius according to the received signal strength of the fourth base station, and select the first center, the third The intersection of multiple circular areas formed by the center of the circle, the fifth center of the circle and the corresponding radii is the third intersection area. The second intersection area and the third intersection area are subtracted from the first intersection area to obtain the current area.

An embodiment of the present invention provides a communication device, which includes a communication module and a tracking movement path module. The communication module is used to form at least N adjacent base stations adjacent to a serving base station and the serving base station into a first base station group. The tracking movement path module is used to respectively detect the received signal strength corresponding to each base station in the first base station group when the communication device is moving, and form the K base stations with increased received signal strength into a second base station group, where 2≤K≤N. In addition, when the communication device is moving, the tracking movement path module sequentially determines the N-K intersection areas when the second base station group has N base stations and when the second base station group has K+1 base stations, and The N-K intersection areas are deducted from a first intersection area obtained when the second base station group has K base stations, so as to obtain the current area of the communication device. The tracking movement path module also determines a first base station and a second base station that have a maximum angle between each other with an initial position of the communication device as the axis in the second base station group. base station; the tracking movement path module also uses the serving base station, the first base station and the second base station as a first center, a second center and a third center respectively according to Obtain a first radius, a second radius and a third radius corresponding to the received signal strengths of the serving base station, the first base station and the second base station, and select the first radius An intersection of a plurality of circular areas formed by a circle center, the second circle center and the third circle center and the corresponding first radius, the second radius and the third radius is the first intersection area; when the serving base station changes, the communication module updates the first base station group and the tracking movement path module updates the second base station group; when the communication device moves again , the tracking movement path module sets the current area as the initial position for the next calculation of the current position.

An embodiment of the present invention provides a method for preventing theft of a communication device, which is applicable to a communication device registered in a serving base station. The method for preventing theft of a communication device includes the following steps. At least N neighboring base stations adjacent to the serving base station and the serving base station are formed into a first base station group. When the communication device moves, respectively detect the received signal strength corresponding to each base station in the first base station group, and form K base stations with increased received signal strength into the second base station group, where 2≤K ≤N. When the communication device moves, sequentially determine N-K intersection areas between when the second base station group has N base stations and when the second base station group has K+1 base stations, and by the second base station group The N-K intersection areas are subtracted from a first intersection area obtained by grouping K base stations to obtain a current area of the communication device. Continuously record the current area of the communication device to record a traveling path of the communication device. Report the above traveling path or the above current area to a remote device. The remote device activates a communication module of the communication device from a dormant state; the communication module activates a tracking movement path module of the communication device; obtains the first base at the initial position a base station identification code of each base station in the station group, and obtaining a geographic location of a plurality of said base stations respectively according to a plurality of said base station identification codes; Geographic location, determining a geographic location of the current area; determining a first base station in the second base station group that has an initial position of the communication device as the axis and has a maximum angle between each other station and a second base station; taking the serving base station, the first base station and the second base station as a first circle center, a second circle center and a third circle center respectively, according to the service Obtain a first radius, a second radius, and a third radius corresponding to the received signal strengths of the base station, the first base station, and the second base station, and select the first circle center, the An intersection of a plurality of circular areas formed by the second center of the circle and the third center of the circle with the corresponding first radius, the second radius, and the third radius is the first intersection area; when the When the serving base station changes, update the first base station group and the second base station group; and when the communication device moves again, select the current area as the next operation for calculating the current position the initial position.

An embodiment of the present invention provides a communication device, which is registered in a service base station and includes a communication module and a tracking movement path module. The communication module is used to form at least N neighboring base stations adjacent to the serving base station and the serving base station to form a first base station group. The tracking movement path module is used to respectively detect the received signal strength corresponding to each base station in the first base station group when the communication device is moving, and form the K base stations with increased received signal strength into a second base station A group, where 2≤K≤N, wherein a remote device activates the tracking movement path module from a sleep state through the communication module. In addition, when the communication device is moving, the tracking movement path module sequentially determines the N-K intersection areas when the second base station group has N base stations and when the second base station group has K+1 base stations, and The N-K intersection areas are deducted from a first intersection area obtained when the second base station group has K base stations, so as to obtain a current area of the communication device. Furthermore, the tracking movement path module continuously records the current area of the communication device to record a traveling path of the communication device. In addition, the tracking movement path module further reports the above-mentioned traveling path or the above-mentioned current area to a remote device. The tracking moving path module obtains a base station identification code of each base station of the first base station group at the initial position, and obtains a plurality of the base stations according to the plurality of base station identification codes respectively A geographic location of the station; the tracking movement path module determines a geographic location of the current area according to the plurality of geographic locations of the plurality of base stations; the tracking movement path module determines the second In the base station group, a first base station and a second base station that have a maximum angle between each other with an initial position of the communication device as the axis; The serving base station, the first base station and the second base station are a first circle center, a second circle center and a third circle center, according to the serving base station, the first base station and the The received signal strength of the second base station is obtained corresponding to a first radius, a second radius and a third radius, and the first circle center, the second circle center and the third circle center are selected to correspond to The intersection of multiple circular areas formed by the first radius, the second radius and the third radius is the first intersection area; when the serving base station changes, the communication module updating the first base station group and the tracking movement path module to update the second base station group; and when the communication device moves again, the tracking movement path module selects the current area as The initial position for the next operation to calculate the current position.

Based on the above, in the above embodiments of the present invention, a method for calculating the current location, a method for preventing theft of a communication device, and a communication device using the method are provided. The method for calculating the current position detects the received signal strength of the base stations, takes each base station with increased received signal strength as the center of a circle, and uses the corresponding received signal strength of each base station as a radius to obtain a plurality of circular areas. The intersection of these circular areas is appropriately selected as the current area of the communication device. In addition, the method for preventing the theft of the communication device further continuously records the current area as a traveling path, and reports the current area and the traveling path to a remote device appropriately.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

Description of drawings

FIG. 1 is a system block diagram of a communication device according to an embodiment of the present invention.

FIG. 2 is a flow chart of a method for preventing theft of a communication device according to an embodiment of the present invention.

FIG. 3A is a schematic diagram of the relative relationship between a communication device and adjacent base stations in a communication network according to an embodiment of the present invention.

FIG. 3B is a schematic diagram of an interaction relationship between a communication device and a base station in a communication network according to an embodiment of the present invention.

FIG. 3C is a schematic diagram of the received signal enhancement of six base stations due to the movement of the communication device according to an embodiment of the present invention.

FIG. 3D is a schematic diagram of another signal enhancement of six base stations due to the movement of the communication device according to an embodiment of the present invention.

FIG. 3E is a schematic diagram of five base stations receiving signal enhancement due to the movement of the communication device according to an embodiment of the present invention.

FIG. 3F is a schematic diagram of the received signal enhancement of four base stations due to the movement of the communication device according to an embodiment of the present invention.

FIG. 3G is a schematic diagram of three base stations receiving signal enhancement due to the movement of the communication device according to an embodiment of the present invention.

FIG. 3H is a schematic diagram of two base stations receiving signal enhancement due to the movement of the communication device according to an embodiment of the present invention.

FIG. 4 is a flowchart of a method for calculating a current location according to an embodiment of the present invention.

FIG. 5 is a flow chart of a method for calculating the current position when the received signals of two base stations are strong according to an embodiment of the present invention.

FIG. 6 is a flowchart of a method for preventing theft of a communication device according to another embodiment of the present invention.

Description of main component symbols:

100, 305: communication device; 400: method of calculating current position;

110: communication module; 120: processor module;

500: The method of calculating the current position when the received signal of two base stations is enhanced;

130: memory module; 600: method for preventing communication device theft;

140: tracking movement path module; 150: alarm device;

Cell 1, Cell 2, Cell 3, Cell 4, Cell 5, Cell 6, Cell 7: base stations;

200: method for preventing communication device theft; S202～S208: steps;

S402～S414, S502～S506, S602～S612: steps;

320, 330, 340, 350, 360, 370: coverage from the base station to the initial location of the communication device.

Detailed ways

FIG. 1 is a system block diagram of a communication device according to an embodiment of the present invention. Referring to FIG. 1 , the communication device 100 includes a communication module 110 , a processor module 120 , a memory module 130 , a tracking movement path module 140 and an alarm device 150 .

In this embodiment, the memory module 130 is coupled to the processor module 120, and can store a program module. When the program module is executed by the processor module 120, it executes one or more media programs. process. Furthermore, the memory module 130 can be one or more memory devices for storing data, an operating system (not shown) and software programs. The memory module 130 also includes a database, and the database stores, for example, electronic maps, short messages, and the like. The memory device of the memory module 130 can be, for example, one or more of a flash memory (Flash memory) device, a magnetic storage device, or an optical storage device. The processor module 120 is used to execute the operating system and other programs, and coordinate the communication module 110 , the tracking module 140 and the alarm device 150 .

The communication module 110 has an antenna (not shown) and a communication protocol stack (protocol stack), which can support Global System for Mobile Communications (Global System for Mobile Communications, referred to as: GSM), Worldwide Interoperability for Microwave Access , referred to as: WiMAX), wideband code division multiple access (Wideband Code Division Multiple Access, referred to as: WCDMA) and any communication protocol of the 3GPP-LTE system, and the present invention is not limited to the above, the communication module 110 also Other types of communication protocols can be supported, such as the cdma2000 system. The communication module 110 can be a communication module embedded in the communication device 100, or a removable communication module. In addition, the communication module 110 has a wake-up function. When the communication device 100 is shut down in the operating system, the battery of the communication device 100 continues to supply power to the communication module 110, and the communication module 110 remains in a state of waiting to wake up ( wake up) state. When the communication module 110 encounters a wake up event, the communication module 110 starts the operating system. For example, when the communication module 110 receives a specific short message, specific packet or specific information sent by a remote device through the communication system or communication network, the communication module 110 starts the operating system, and when the operating system is officially started, Feedback information is provided to the communication module 110 . The communication module 110 can further send specific short messages, specific packets or specific information to respond to the remote device after the operating system is officially powered on.

In this embodiment, the communication device 100 is a communication device with the function of calculating the current position and the function of anti-theft, and the main steps of the anti-theft method can be introduced with FIG. 2 . FIG. 2 is a flow chart of a method for preventing theft of a communication device according to an embodiment of the present invention. Briefly speaking, the communication device theft prevention method 200 includes: using the communication module to activate the communication device (step S202); detecting the serving base station and adjacent base stations in the currently registered communication network (step S204); Calculate the current location with the information of the neighboring base stations (step S206); and track the traveling path of the communication device according to the estimated current location, and take actions according to the traveling path or the current location (step S208). The detailed technical content of step S206 will be further introduced below with reference to FIG. 3A to FIG. 3H .

FIG. 3A is a schematic diagram of the relative relationship between a communication device and adjacent base stations in a communication network according to an embodiment of the present invention. Please refer to FIG. 3A, the communication network includes at least one serving base station (marked as Cell 7) and a plurality of other base stations adjacent to the serving base station (for example: respectively marked as Cell 1, Cell 2, Cell 3, Cell 4, Cell 5 , the adjacent base station of Cell 6). The communication device 305 can move to any position in the communication network, but the detailed technical content of step S206 will be introduced below with the movement status of the communication device 305 within this range (for example: moving from point A to point B), that is, Detailed actions of the method to calculate the current position.

FIG. 3B is a schematic diagram of an interaction relationship between a communication device and a base station in a communication network according to an embodiment of the present invention. In this embodiment, the method for calculating the current location is based on the relationship between the distance between the communication device 305 and the base station and the change in signal strength. As shown in FIG. 3B , a base station is used as the center of the circle, and the distance between it and the current position of the communication device 305 is used as a radius to form a circle. Herein, the current position of the base station is called a starting point (or an initial position). When the communication device 305 moves toward the base station, that is, moves in the circle, the received signal strength detected after moving will be greater than or equal to the received signal strength at the initial position. Conversely, when the communication device 305 moves away from the base station, that is, it moves outside the circle, theoretically the received signal strength detected at any position outside the circle will be less than or equal to the signal detected at the initial position strength. Please refer to FIG. 3A. According to the above principles, the mobile state of the communication device 305 in the communication network can be divided into at least several states. The following will introduce each state (received signal strength of different numbers of base stations) with FIGS. 3C to 3H will be enhanced), the detailed steps of how to calculate the current location method to obtain the current area (or current location) of the communication device 305.

FIG. 3C is a schematic diagram of the received signal enhancement of six base stations due to the movement of the communication device according to an embodiment of the present invention. Assuming that the communication device 305 takes the point marked 305 in FIG. 3C as the initial position, the initial position can be obtained by using the communication device 305 provided by the telecommunications provider, or roughly obtained through other applications, such as Google map. In addition, the circular dotted lines 320, 330, 340, 350, 360, and 370 in FIG. 3C are for illustrative purposes only, and they respectively represent base station Cell 2, Cell 3, Cell 4, Cell 5, Cell 6, Cell 7 Coverage of the initial location of the communication device 305 . Please refer to FIG. 3C, where the communication device 305 detects that the received signal strengths of six base stations are enhanced due to the movement of the communication device 305, and these base stations are respectively Cell 2, Cell 3, Cell 4, Cell 5, Cell 6 and Cell7 (this is the serving base station). Next, the communication device 305 draws a line from the initial position to the base stations Cell 2, Cell 3, Cell 4, Cell 5, Cell 6 and Cell 7, and finds the base station forming a maximum angle among these base stations. In FIG. 3C , base stations Cell 2 and Cell 6 are two base stations with a maximum angle. Take the current positions of the base station Cell 2, Cell 6, and Cell 7 as the center of the circle, and respectively take the initial position to the base station Cell 2, Cell 6, and Cell 7 (serving base station) as the corresponding radii to determine the three circular areas The intersection area (marked with a slash) of is the current area of the communication device 305 .

In other embodiments of the present invention, the method for calculating the current location may further determine whether the detected signal strength changes of the base stations Cell 2 and Cell 6 are increasing or decreasing when the communication device 305 is traveling. If the change in received signal strength is increasing, the current area of the communication device 305 can be further limited to the upper half of the intersection area obtained above (the dividing line is a connection line between the base stations Cell 2 and Cell 6). On the contrary, if the variation of the received signal strength is reduced, the current area of the communication device 305 may be further limited to the lower half of the intersection area obtained above.

However, the present invention is not limited to the above. FIG. 3D will be used to introduce another situation of enhanced received signals of six base stations. FIG. 3D is a schematic diagram of another signal enhancement of six base stations due to the movement of the communication device according to an embodiment of the present invention. Please refer to FIG. 3D. In FIG. 3D, the communication device 305 moves closer to the base station Cell 2, but the actual determination of the current area of the communication device 305 is still substantially the same as in FIG. 3C.

FIG. 3E is a schematic diagram of five base stations receiving signal enhancement due to the movement of the communication device according to an embodiment of the present invention. Here, the base stations Cell 2, Cell 3, Cell 4, Cell 5, and Cell 7 receive signal enhancement respectively. The intersection area of the two base stations Cell 2 and Cell 5 with a maximum included angle is still calculated according to the manner in FIG. 3C . However, in this case, the portion overlapping with the above-mentioned intersection area where the reception signal enhancements of six base stations are enhanced is deleted. In this way, the current area of the communication device 305 can be narrowed down to the area marked with oblique lines in FIG. 3E .

FIG. 3F is a schematic diagram of the received signal enhancement of four base stations due to the movement of the communication device according to an embodiment of the present invention. Here, the base stations Cell 2, Cell 3, Cell 4 and Cell 7 receive signal enhancement respectively. The intersection area of two base stations Cell 2 and Cell 7 with a maximum included angle is still calculated according to the manner in FIG. 3C . However, in this case, the part overlapping with the above-mentioned intersection area with six base stations and five base stations receiving signal enhancement should be deleted. In this way, the current area of the communication device 305 can be narrowed down to the area marked with oblique lines in FIG. 3F .

FIG. 3G is a schematic diagram of three base stations receiving signal enhancement due to the movement of the communication device according to an embodiment of the present invention. Here, the ones receiving signal enhancement are base station Cell 3, Cell 4 and Cell 5 respectively. The intersection area of the two base stations Cell 3 and Cell 5 with a maximum included angle is still calculated according to the manner in FIG. 3C . However, in this case, the portion overlapping with the above-mentioned intersection area with six base stations, five base stations and four base stations with enhanced received signal should be deleted. In this way, the current area of the communication device 305 can be narrowed down to the area marked with oblique lines in FIG. 3G .

By summarizing the various states above, a flow chart of the method 400 for calculating the current location as shown in FIG. 4 can be obtained. FIG. 4 is a flowchart of a method for calculating a current location according to an embodiment of the present invention. Please refer to FIG. 1 and FIG. 4 at the same time, roughly speaking, the method 400 for calculating the current location includes the following steps. The serving base station of the communication device 305 and at least N neighboring base stations are formed into a first base station group (step S402 ), wherein N is a positive integer greater than zero. When the communication device 305 moves, respectively detect the received signal strength corresponding to each base station in the first base station group, and form the second base station group with K base stations with increased received signal strength, wherein 2≤ K≦N (step S404). In the second base station group, the first base station and the second base station that have a maximum angle between each other with the initial position of the communication device 305 as the axis are determined (step S406 ). Taking the serving base station, the first base station and the second base station as the first circle center, the second circle center and the third circle center respectively; according to the received signal strengths of the serving base station, the first base station and the second base station, the corresponding The first radius, the second radius and the third radius; selecting an intersection of a plurality of circular areas formed by these centers and corresponding radii as a first intersection area (step S408 ).

Please continue to refer to FIG. 4 , the method 400 for calculating the current position also includes: sequentially determining when the second base station group has N base stations to N-K intersection areas with K+1 base stations, and the second base station The N-K intersection areas are subtracted from the first intersection area obtained by the group of K base stations to obtain the current area of the communication device (step S410 ). In addition, when the serving base station is changed, the first base station group and the second base station group are updated (step S412). When the communication device 305 moves again, the current area is set as the initial position for the next calculation of the current position (step S414 ). It is worth mentioning here that the above-mentioned steps S401-S414 can operate in a loop, and some steps can be performed simultaneously.

However, the situation is more complicated when there are two base stations with strong received signals. Fig. 3H is a schematic diagram of the received signal enhancement of two base stations due to the movement of the communication device according to an embodiment of the present invention. Please refer to Fig. 3H. At this time, the two base stations with correct received signal enhancement are base stations Cell 3 and Cell 4. However, in addition to deleting the overlapping areas of the above-mentioned intersection areas with six base stations, five base stations, four base stations, and three base station received signal enhancements, another two sets of received signals need to be deleted There is a change in the intersection area of two base stations. That is, referring to FIG. 3H , in addition, there will be intersection areas between base stations Cell 2 and Cell 3 and base stations Cell 4 and Cell 5 that need to be additionally deleted. In this way, the current area of the communication device 305 can be narrowed down to the area marked with oblique lines in FIG. 3H . In the following, FIG. 5 will be used to sort out the steps of the method for calculating the current position when the received signals of two base stations are enhanced.

FIG. 5 is a flow chart of a method for calculating the current position when the received signals of two base stations are strong according to an embodiment of the present invention. Please refer to FIG. 4 and FIG. 5 at the same time, the method 500 includes the following steps. Taking a third base station closest to the first base station outside the second base station group as the fourth center, obtain the corresponding fourth radius according to the received signal strength of the third base station, and select the first center, the second The intersection of multiple circular areas formed by the center of the circle, the fourth center of the circle and the corresponding radii is the second intersection area (step S502). Similarly, taking a fourth base station closest to the second base station outside the second base station group as the fifth center, obtain the corresponding fifth radius according to the received signal strength of the fourth base station, and select the first The intersection of multiple circular areas formed by the center of the circle, the third center of the circle, the fifth center of the circle and the corresponding radii is the third intersection area (step S504). Subtracting the second intersection area and the third intersection area from the first intersection area to obtain the current area of the communication device 305 (step S506 ). In addition to the above-mentioned method for calculating the current location, the present invention can further provide a method for preventing communication device theft. The steps of the method for preventing communication device theft will be introduced below with reference to FIG. 6 .

FIG. 6 is a flowchart of a method for preventing theft of a communication device according to another embodiment of the present invention. Please refer to FIG. 6 , the method 600 for preventing communication device theft includes the following steps. A remote device activates the communication module 110 of a communication device 305 from a sleep state (step S602). The communication module 110 activates the tracking movement path module 140 of the communication device 305 (step S604 ). Obtain a base station identification code of each base station of the first base station group at an initial location, and respectively obtain the geographic locations of the base stations according to the base station identification codes (step S606 ). The base station identification code described here includes, for example, the Network Country Code (Network Country Code, referred to as: NCC), the mobile country code (Mobility Country Code, referred to as: MCC) and the location area code in the GSM system or WCDMA system. (Location AreaCode, referred to as: LAC) and base station code (Cell Identity, referred to as: Cell ID). Through the aforementioned feature data such as NCC, MCC, LAC, and Cell ID, the geographic location of one or more base stations can be compared with the telecom operator. In addition, the geographical location of one or more base stations can also be queried from the above characteristic data such as NCC, MCC, LAC and Cell ID through software such as Google map.

Please continue to refer to FIG. 1 and FIG. 6 , and calculate the current area of the communication device 305 according to the information of the serving base station and neighboring base stations (step S608 ). That is, the current area of the communication device 305 is obtained by using the above-mentioned method 400 for calculating the current location and the method 500 for calculating the current location when the received signals of two base stations are enhanced. Continuously record the current area of the communication device 305 to record a traveling path of the communication device (step S610). Report the traveling path or current area to the remote device (step S612). It is worth mentioning here that the above-mentioned steps S401-S414 can operate in a loop, and some steps can be performed simultaneously. In addition, other embodiments of the present invention provide another communication device theft prevention method, which can contact the communication module 305 when the remote device is close to the communication device 305 (for example: the distance between the two is less than 5 meters). Group 110 to activate the alarm device 150 in the communication device 305 to generate an alarm effect in a high-decibel audio alarm mode or a high-brightness optical alarm mode to further confirm the correct position of the communication module 110 within a short distance.

In summary, multiple embodiments of the present invention provide a method for calculating the current location, a method for preventing theft of a communication device, and a communication device using the method. The method for calculating the current position detects the received signal strength of the base stations, takes each base station with increased received signal strength as the center of a circle, and uses the corresponding received signal strength of each base station as a radius to form a plurality of circular areas. The intersection of these circular areas is appropriately selected as the current area of the communication device. In addition, the method for preventing the theft of the communication device further continuously records the current area as a traveling path, and reports the current area and the traveling path to a remote device appropriately.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Any person skilled in the art can make appropriate changes or equivalent replacements without departing from the spirit and scope of the present invention, so the protection scope of the present invention The scope defined in the claims shall prevail.

Claims (4)

1. A method for calculating the current location, applicable to a communication device, wherein the communication device is registered in a service base station, characterized in that the method for calculating the current location includes: forming at least N neighboring base stations adjacent to the serving base station and the serving base station into a first base station group; When the communication device moves, respectively detect a received signal strength corresponding to each base station in the first base station group, and form K base stations with increased received signal strengths into a second base station group, where 2≤K≤N; Sequentially determine N-K intersection areas when the second base station group has N base stations to when the second base station group has K+1 base stations, and when the second base station group has Deducting the N-K intersection areas from a first intersection area obtained by the K base stations to obtain a current area of the communication device; determining a first base station and a second base station that have a maximum angle between each other with an initial position of the communication device as an axis in the second base station group; Taking the serving base station, the first base station and the second base station as a first circle center, a second circle center and a third circle center respectively, according to the serving base station, the first base station The received signal strength of the station and the second base station obtains a corresponding first radius, a second radius and a third radius, and selects the first circle center, the second circle center and the third circle center and An intersection of a plurality of circular areas formed by the corresponding first radius, the second radius, and the third radius is the first intersection area; updating the first base station group and the second base station group when the serving base station changes; and When the communication device moves again, setting the current area as the initial position for the next calculation of the current position, Wherein, when K=2, the method for calculating the current position also includes: Taking a third base station closest to the first base station outside the second base station group as a fourth circle center, and obtaining a corresponding fourth base station according to the received signal strength of the third base station Radius, and select one of a plurality of circular areas formed by the first center, the second center and the fourth center and the corresponding first radius, the second radius and the fourth radius the intersection is a second intersection area; Taking a fourth base station closest to the second base station outside the second base station group as a fifth circle center, and obtaining a corresponding fifth circle according to the received signal strength of the fourth base station radius, and select one of a plurality of circular areas formed by the first center, the third center and the fifth center and the corresponding first radius, the third radius and the fifth radius the intersection is a third intersection area; and The second intersection area and the third intersection area are additionally deducted from the first intersection area to obtain the current area. 2. A communication device, characterized in that it comprises: A communication module, used to form at least N neighboring base stations adjacent to a serving base station and the serving base station into a first base station group; A moving path tracking module, used to respectively detect a received signal strength corresponding to each base station in the first base station group when the communication device is moving, and increase the received signal strength by K base stations form a second base station group, where 2≤K≤N; When the communication device moves, the tracking movement path module sequentially determines when the second base station group has N base stations to when the second base station group has K+1 base stations N-K intersection areas, and deducting the N-K intersection areas from a first intersection area obtained when the second base station group has K base stations, to obtain a current area of the communication device; The tracking movement path module also determines a first base station and a second base station that have a maximum angle between each other with an initial position of the communication device as the axis in the second base station group. base station; The tracking movement path module also takes the serving base station, the first base station and the second base station as a first center, a second center and a third center respectively, according to the service Obtain a first radius, a second radius, and a third radius corresponding to the received signal strengths of the base station, the first base station, and the second base station, and select the first circle center, the An intersection of a plurality of circular areas formed by the second circle center and the third circle center and the corresponding first radius, the second radius, and the third radius is the first intersection area; The communication module updates the first base station group and the tracking movement path module updates the second base station group when the serving base station changes; and When the communication device moves again, the tracking movement path module sets the current area as the initial position for the next calculation of the current position, Among them, when K=2, The tracking movement path module takes a third base station closest to the first base station outside the second base station group as a fourth circle center, and according to the received signal of the third base station Intensity obtains a corresponding fourth radius, and selects the first circle center, the second circle center and the fourth circle center and the corresponding first radius, the second radius and the fourth radius to form An intersection of multiple circular areas is a second intersection area; The tracking movement path module takes a fourth base station closest to the second base station outside the second base station group as a fifth circle center, and according to the received signal of the fourth base station Intensity obtains a corresponding fifth radius, and selects the first circle center, the third circle center and the fifth circle center and the corresponding first radius, the third radius and the fifth radius to form An intersection of multiple circular areas is a third intersection area; and The tracking movement path module additionally subtracts the second intersection area and the third intersection area from the first intersection area to obtain the current area. 3. A method for preventing theft of a communication device, applicable to a communication device registered in a service base station, characterized in that the method for preventing theft of a communication device comprises: forming at least N neighboring base stations adjacent to the serving base station and the serving base station into a first base station group; When the communication device moves, respectively detect a received signal strength corresponding to each base station in the first base station group, and form K base stations with increased received signal strengths into a second base station group, where 2≤K≤N; When the communication device moves, sequentially determine N-K intersection areas when the second base station group has N base stations and when the second base station group has K+1 base stations, and when Deducting the N-K intersection areas from a first intersection area obtained by K base stations in the second base station group to obtain a current area of the communication device; continuously recording the current area of the communication device to record a travel path of the communication device; report the travel path or the current area to a remote device; The remote device activates a communication module of the communication device from a dormant state; The communication module activates a tracking movement path module of the communication device; Obtaining a base station identification code of each base station of the first base station group at an initial position, and obtaining a geographic location of a plurality of base stations respectively according to a plurality of the base station identification codes; determining a geographic location of the current area according to multiple geographic locations of multiple base stations; determining a first base station and a second base station that have a maximum angle between each other with the initial position of the communication device as an axis in the second base station group; Taking the serving base station, the first base station and the second base station as a first circle center, a second circle center and a third circle center respectively, according to the serving base station, the first base station Obtain a first radius, a second radius and a third radius corresponding to the received signal strength of the station and the second base station, and select the first circle center, the second circle center and the third circle center An intersection of a plurality of circular areas formed by the center of the circle and the corresponding first radius, the second radius, and the third radius is the first intersection area; updating the first base station group and the second base station group when the serving base station changes; and When the communication device moves again, select the current area as the initial position for the next calculation of the current position, Wherein, when K=2, the method for preventing communication device theft also includes: Taking a third base station closest to the first base station outside the second base station group as a fourth circle center, and obtaining a corresponding fourth base station according to the received signal strength of the third base station Radius, and select one of a plurality of circular areas formed by the first center, the second center and the fourth center and the corresponding first radius, the second radius and the fourth radius the intersection is a second intersection area; Taking a fourth base station closest to the second base station outside the second base station group as a fifth circle center, and obtaining a corresponding fifth circle according to the received signal strength of the fourth base station radius, and select one of a plurality of circular areas formed by the first center, the third center and the fifth center and the corresponding first radius, the third radius and the fifth radius the intersection is a third intersection area; and The second intersection area and the third intersection area are additionally deducted from the first intersection area to obtain the current area. 4. A communication device, the communication device registered in a service base station, characterized in that the communication device comprises: A communication module, used to form at least N neighboring base stations adjacent to the serving base station and the serving base station into a first base station group; A moving path tracking module, used to respectively detect a received signal strength corresponding to each base station in the first base station group when the communication device is moving, and increase the received signal strength by K base stations form a second base station group, where 2≦K≦N, wherein a remote device activates the tracking movement path module from a sleep state through the communication module; When the communication device moves, the tracking movement path module sequentially determines when the second base station group has N base stations to when the second base station group has K+1 base stations N-K intersection areas, and deducting the N-K intersection areas from a first intersection area obtained when the second base station group has K base stations, to obtain a current area of the communication device; The tracking movement path module continuously records the current area of the communication device to record a travel path of the communication device; The tracking moving path module further reports the traveling path or the current area to a remote device; The tracking moving path module obtains a base station identification code of each base station of the first base station group at an initial position, and obtains a plurality of the base station according to the plurality of base station identification codes respectively a geographic location; The tracking movement path module determines a geographic location of the current area according to the multiple geographic locations of the multiple base stations; The tracking movement path module determines a first base station and a second base station that have a maximum angle between each other with the initial position of the communication device as the axis in the second base station group. base station; The tracking movement path module respectively takes the serving base station, the first base station and the second base station as a first circle center, a second circle center and a third circle center respectively according to the service base Obtain a first radius, a second radius, and a third radius corresponding to the received signal strengths of the station, the first base station, and the second base station, and select the first circle center, the second An intersection of a plurality of circular areas formed by the two centers and the third center and the corresponding first radius, the second radius, and the third radius is the first intersection area; The communication module updates the first base station group and the tracking movement path module updates the second base station group when the serving base station changes; and When the communication device moves again, the tracking movement path module selects the current area as the initial position for the next calculation of the current position, Among them, when K=2, The tracking movement path module takes a third base station closest to the first base station outside the second base station group as a fourth circle center, and according to the received signal of the third base station Intensity obtains a corresponding fourth radius, and selects the first circle center, the second circle center and the fourth circle center and the corresponding first radius, the second radius and the fourth radius to form An intersection of multiple circular areas is a second intersection area; The tracking movement path module takes a fourth base station closest to the second base station outside the second base station group as a fifth circle center, and according to the received signal of the fourth base station Intensity obtains a corresponding fifth radius, and selects the first circle center, the third circle center and the fifth circle center and the corresponding first radius, the third radius and the fifth radius to form An intersection of multiple circular areas is a third intersection area; and The tracking movement path module additionally subtracts the second intersection area and the third intersection area from the first intersection area to obtain the current area.