WO2019020082A1

WO2019020082A1 - Geo-fence generating method and device thereof

Info

Publication number: WO2019020082A1
Application number: PCT/CN2018/097275
Authority: WO
Inventors: 李靖; 唐毅力; 吕玮; 黎旭荣
Original assignee: 阿里巴巴集团控股有限公司; 李靖; 唐毅力; 吕玮; 黎旭荣
Priority date: 2017-07-28
Filing date: 2018-07-26
Publication date: 2019-01-31
Also published as: TWI674014B; TW201911889A; CN107623897B; CN107623897A

Abstract

The present application discloses a geo-fence generating method and a device thereof. The method comprises: receiving a plurality of coordinate sets in a coordinate list, wherein the plurality of coordinate sets comprises current coordinates; determining reference coordinates of the current coordinates; determining whether a distance between the current coordinates and the reference coordinates is greater than or equal to an additional distance, wherein the additional distance determines whether the current coordinates are confirmed to be a measure of additional coordinates in terms of distance; if the distance between the reference coordinates and the current coordinates is greater than or equal to the additional distance, determining the current coordinates to be additional coordinates for forming a geo-fence; and generating a geo-fence by means of the determined additional coordinates.

Description

Geofence generation method and device thereof

Technical field

The present application relates to the field of computers, and in particular, to a method and device for generating a geofence.

Background technique

With the development of mobile communication technology and the popularity of computer technology, Location-Based Service (LBS) technology is entering people's lives. With the LBS technology, the location of the mobile terminal can be obtained by locating the mobile terminal, thereby providing the mobile terminal with a service related to the location with which it is located.

In recent years, with the rapid development of LBS technology, new applications based on LBS technology have emerged in an endless stream. As a new application of LBS technology, Geo-fencing technology has attracted more and more attention. Geofence technology can enclose a geofence area with a virtual fence. When the mobile terminal is active in the geofence area or in the vicinity of the geofence area, the notification and reminder corresponding to the geofence area can be received.

When a certain area is drawn and highlighted by the fence coordinates forming the geofence, the boundary information usually contains a large amount of coordinate information. If the coordinate information is not processed directly, the coordinate information is used for display, which may cause obvious performance problems and affect the use experience. .

Therefore, the prior art requires a technical solution for screening the coordinates of the geofence.

The above information is presented as background information only to assist in understanding the present disclosure. As to whether any of the above information is applicable as prior art to the present disclosure, no decision has been made and no statement has been made.

Summary of the invention

The main purpose of one or more embodiments of the present specification is to provide a method for generating a geofence and an apparatus thereof, which are directed to solving the above-mentioned coordinate screening problem.

An aspect of one or more embodiments of the present specification provides a geofence generating method, the method comprising: receiving a plurality of coordinates in a coordinate list, wherein the plurality of coordinates includes a current coordinate; determining a reference coordinate of the current coordinate Determining whether the distance between the current coordinate and the reference coordinate is greater than or equal to the joining distance, wherein the joining distance is a metric that determines whether the current coordinate is determined to be added coordinates in the distance; if the distance is greater than or equal to the joining distance, determining the current coordinate to form a geofence Join the coordinates. A geofence is generated using the determined join coordinates.

Optionally, the method further includes: calculating a screening probability, where the screening probability is a metric that determines whether the current coordinate is determined to be a joining coordinate; if the distance between the current coordinate and the reference coordinate is less than the joining distance, screening The probability determines whether the current coordinate is a join coordinate.

Another aspect of one or more embodiments of the present specification provides a geofence generating apparatus, the apparatus comprising: a receiving unit that receives a plurality of coordinates in a coordinate list, wherein the plurality of coordinates include current coordinates; determining a reference a coordinate unit that determines a reference coordinate of the current coordinate; a distance determining unit that determines whether a distance between the current coordinate and the reference coordinate is greater than or equal to a joining distance, wherein the joining distance is a metric that determines whether the current coordinate is determined to be a joining coordinate in the distance; The first determining unit determines, according to the distance determining unit, that the distance between the current coordinate and the reference coordinate is greater than or equal to the joining distance, determining that the current coordinate is the joining coordinate forming the geofence; and the generating unit generates the geofence by using the determined joining coordinates.

Optionally, the device further includes: calculating a screening probability unit, and calculating a screening probability, where the screening probability is a metric that determines whether the current coordinate is determined as a joining coordinate by using a probability; and the second determining unit determines whether to join by using the screening probability Current coordinates.

Another aspect of one or more embodiments of the present specification provides a geofence device, the device comprising: a processor;

Arranging to store a computer class execution instruction memory, the executable instructions, when executed, causing the processor to: receive a plurality of coordinates in a coordinate list, wherein the plurality of coordinates include current coordinates; determining The reference coordinate of the current coordinate; determining whether the distance between the current coordinate and the reference coordinate is greater than or equal to the joining distance, wherein the joining distance is a metric that determines whether the current coordinate is determined to be added coordinates in the distance; if the distance is greater than or equal to the joining distance, determining the current The coordinates are the joining coordinates that form the geofence. A geofence is generated using the determined join coordinates.

Compared with the prior art, according to one or more embodiments of the present specification, the joining distance is used to filter a plurality of coordinates in the coordinate list to determine the joining coordinates of forming the geofence, thereby being able to reduce the geofence while retaining the shape of the area. The number of coordinates displayed. Further, according to another embodiment of the present specification, the screening probability is used to further filter the coordinates that cannot be added by using the joining distance based on the screening of the coordinates by using the joining distance, so that the full shape of the region can be preserved while enriching Details of the area.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the present application, and are intended to be a part of this application. In the drawing:

1 is a diagram showing a geofence in accordance with one or more embodiments of the present specification;

2 is a flow chart showing a method of generating a geofence in accordance with one or more embodiments of the present specification;

3 is a flow chart showing a method of generating a geofence according to another embodiment of the present specification;

4A through 4F are diagrams illustrating determining coordinates in accordance with one or more embodiments of the present specification;

FIG. 5 is a block diagram showing a geofence generating device in accordance with one or more embodiments of the present specification;

6 is a block diagram showing an electronic device that performs a geofence generation method in accordance with one or more embodiments of the present specification;

Detailed ways

The technical solutions of the present application will be clearly and completely described in the following with reference to the specific embodiments of the present application and the corresponding drawings. It is apparent that the described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

Hereinafter, embodiments will be described in more detail with reference to the accompanying drawings. The same reference numerals will always be used to refer to the same elements.

FIG. 1 is a diagram showing a geofence in accordance with one or more embodiments of the present specification.

As shown in FIG. 1, the geofence technology can be used to connect the geofences forming the geofences to form a geofence of Zhengzhou City as shown in FIG. 1, and the geofence is displayed on the display. It can be clearly seen that the more coordinates that form the geofence, the clearer the outline of the displayed area, but the more coordinates that form the geofence at the same time, the higher the requirements on the display device. In addition, in many cases, the display device only needs to display the outline of the geofence, and does not need to display outline information that is too detailed. Based on the above considerations, the present application proposes a geofence generation method.

2 is a flow chart showing a geofence generation method in accordance with one or more embodiments of the present specification.

As shown in FIG. 2, in step S210, a plurality of coordinates in the coordinate list are received. Specifically, the coordinate list may include a list of a plurality of coordinates of a geofence that has formed a specific region (eg, Zhengzhou City in FIG. 1), that is, coordinates in the coordinate list are based on a geofence A set of multiple coordinates that the algorithm has determined. Those skilled in the art will appreciate that all methods for obtaining a list of coordinates corresponding to a particular region based on an existing geofence algorithm can be applied to the present application.

Subsequently, the following steps can be performed for the current coordinates, it being understood that the current coordinates can include coordinates that belong to the list of coordinates and are traversing, that is, the decision being made to determine whether to add it to the geofence is the current coordinate. It should be noted that the "joining" mentioned in one or more embodiments of the present specification may be to determine the coordinates as the final fence data, in other words, if a certain coordinate can be added, the coordinates are determined to be displayable on the display. coordinate.

At step S220, the reference coordinates of the current coordinates are determined. The reference coordinates are the join coordinates that are closest in time to the current coordinates, where the join coordinates may be the coordinates that are ultimately added to the geofence and displayable on the display. Optionally, if it is determined that there is no reference coordinate, the current coordinate is determined as the joining coordinate. For example, when the first coordinate in the coordinate list is operated, there is no joining coordinate closest to the current coordinate in time, and the first coordinate is determined as the joining coordinate, so that when the second coordinate is operated, the first The coordinates can be used as the reference coordinates of the second coordinate.

Next, in step S230, it is determined whether the distance between the current coordinate and the reference coordinate is greater than or equal to the joining distance, wherein the joining distance is a metric that determines whether the current coordinate is determined to be the joining coordinate in the distance. Specifically, the joining distance is calculated by the distance between the plurality of coordinates in the coordinate list and the predetermined maximum number of joining coordinates determined according to the joining distance. The specific formula is as follows:

D=∑ ⁿ _m=1 D _m /Count _max

Where ∑ ⁿ _m=1 D _m represents the sum of the distances between the plurality of coordinates in the coordinate list, and may indicate the sum of the distances between the adjacent two coordinates, the distance may include Any distance algorithm for the length of the space, for example, may include Euclidean distance, Manhattan distance, and Chebyshev distance. In the present application, the Manhattan distance is preferably used, and the Manhattan distance between the coordinates (x ₁ , y ₁ ) and the coordinates (x ₂ , y ₂ ) is d=│x ₁ -x ₂ │+│y ₁ -y ₂ │ . Count _max is a predetermined maximum number of joining coordinates determined according to the joining distance, and the predetermined maximum number of joining coordinates may indicate the maximum number of coordinates that can be displayed on the screen, which is usually preset by the user according to the display performance and experience of the display device. Fixed.

In step S240, if it is determined that the distance between the current coordinate and the reference coordinate is greater than or equal to the joining distance, the current coordinate is determined to be the joining coordinate forming the geofence. It can be seen from the above analysis that the distance sum is fixed, and it can be seen that the number of dynamically added coordinates can be controlled by dynamically setting Count _max .

Subsequently, in step S250, a geofence is generated using the determined joining coordinates.

Optionally, determining whether the next coordinate of the current coordinate is a joining coordinate forming a geofence according to a clockwise direction or a counterclockwise direction of the closed contour formed by the plurality of coordinates in the coordinate list, in this manner, determining multiple Whether each coordinate in the coordinates is the joining coordinate that forms the geofence. After the plurality of coordinates in the coordinate list have completed the determining step, the determined joining coordinates can be used to generate the geofence.

As described above, the geofence generation method according to one or more embodiments of the present specification utilizes the addition distance to filter a plurality of coordinates in the coordinate list to determine the joining coordinates forming the geofence, thereby being able to retain the shape of the region while reducing the coordinates. The number of displays increases display performance.

Further, if it is judged in step S230 that the distance between the current coordinate and the reference coordinate is smaller than the joining distance, the current coordinate can be further processed, which will be described in detail below with reference to FIG.

FIG. 3 is a flow chart showing a method of generating a geofence according to another embodiment of the present specification. Since steps S210 to S230 are the same as steps S310 to 330, steps S310 to 330 will not be described in detail herein.

If it is determined in step S330 that the distance between the current coordinate and the reference coordinate is less than the joining distance, then in step S340, a screening probability is calculated, and the screening probability is a metric that determines whether the current coordinate is determined to be a joining coordinate in terms of probability. The screening probability is determined by adding a predetermined desired number of coordinates, the actual number of added coordinates, and the number of coordinates in the coordinate list, the formula of which is as follows:

P=(Count _E- Count _Max )/Count _All

Wherein, Count _E represents a predetermined desired number of added coordinates, that is, a desired number of coordinates displayed on the screen, and Count _Max represents a maximum value of the actual number of joined coordinates added according to the joining distance, that is, a plurality of coordinates in the coordinate list. After performing the geofence generation method, the maximum number of join coordinates is determined. Count _E and Count _Max may be predetermined by the user before executing the fence generation algorithm of one or more embodiments of the present specification. Alternatively, the user may Count _E and Count _Max are predetermined according to the display performance and experience of the display device, and Count _All represents the number of coordinates in the coordinate list.

Subsequently, in step S350, it is determined by screening probability whether or not to join the current coordinates. Specifically, the random number allocation algorithm is used to allocate a random number to the current coordinate, wherein the random number ranges from 0 to 1; if the random number assigned to the current coordinate is smaller than the screening probability, the current coordinate is determined to be joined. coordinate. In the implementation process, the user can directly call the interface of the encapsulated random number allocation algorithm to assign a random number to the current coordinates.

If it is determined in step S350 that the current coordinates are added by the screening probability, then the current coordinates are determined to be the joining coordinates of the geofence formed in step S360, and if the current coordinates are not added by the screening probability in step S350, the current coordinates are obtained. Cannot be used as a join coordinate.

Subsequently, at S370, a geofence may be generated based on the determined joining coordinates.

Assume that the number of joining coordinates determined by the joining distance is Count _a , the number of joining coordinates determined by the screening probability is Count _p , and the number of joining coordinates obtained after processing a plurality of coordinates is Count _R , and the number of added coordinates The expected value is E(Count _R ), then E(Count _R )=Count _a +Count _p . It can be seen from the above analysis that Count _p is a joining coordinate determined after determining the coordinates other than the joining coordinates that are determined to be added coordinates in addition to the joining distance, so Count _p = P * (Count _{All -} Count _a ).

According to the formula for screening probability: Count _Max + P * Count _All = Count _E .

Therefore, E(Count _R )=Count _a +P*(Count _All -Count _a )<Count _Max +P*Count _All =Count _E . It can be seen that E(Count _R )<Count _E , that is, the expected value of the number of added coordinates will be less than the predetermined expected number of added coordinates. Further, according to the definition of Count _Max, Count _Max can be expressed as a distance and a ratio of the distance D is added, From the above analysis, the average distance D between the added coordinate _AVGR geofence last generated necessarily must be smaller than the distance D equal to join , so it can be concluded that Count _R = distance and /D _AvgR > distance and /D = Count _Max, ie, Count _R > Count _Max . The size derived above based on the set screening probability can help the user to preset various parameters (for example, Count _E , Count _Max ).

As described above, the geofence generation method according to one or more embodiments of the present specification utilizes the screening probability to further filter the coordinates that cannot be added by using the joining distance on the basis of the screening by using the joining distance, so that the area can be maintained in the holding area. The complete shape enriches the details of the area. For example, for a region with a large difference between the east and west contours, that is, the western contour is smooth and the eastern contour is tortuous. If only the addition distance is used to filter the coordinates, the eastern contour may be excessively smoothed. Further screening by using the screening probability can increase the coordinates of the eastern contour, thus enriching the details of the eastern part.

A method of determining coordinates according to one or more embodiments of the present specification will be described below in conjunction with the diagrams illustrated in FIGS. 4A through 4F.

Fig. 4A shows a closed contour formed by a plurality of coordinates in a coordinate list. For convenience of description, the number of coordinates constituting the coordinate list is simplified in Fig. 4A, and the number of coordinates in actual application will be much larger than this.

Next, referring to FIG. 4B, the coordinate A is used as the starting coordinate (the first coordinate in the coordinate list described above), there is no joining coordinate closest to the coordinate A in time, so the coordinate A does not have the reference coordinate, so The coordinate A can be determined as the joining coordinates, and then the coordinate B is judged.

As shown in FIG. 4C, the reference coordinate of the coordinate B is the coordinate A, and the coordinate B can be determined according to the method described in FIG. 2. Specifically, it is determined whether the distance AB between the coordinate A and the coordinate B is greater than the joining distance. It is judged that the distance AB is greater than the joining distance, and the coordinate B can be determined as the joining coordinates.

Next, as shown in FIG. 4D, the coordinate C is determined, and the reference coordinate of the coordinate C is the coordinate B. After determining that the distance BC between the coordinate B and the coordinate C is smaller than the joining distance, the method is calculated according to the method described in FIG. The probability is screened, and if the coordinates are not added according to the screening probability, the coordinate D is judged.

As shown in FIG. 4E, the reference coordinate of the coordinate D is the coordinate B. It is judged that the distance BD between the coordinate B and the coordinate D is greater than the joining distance, and the coordinate D is determined to be the joining coordinate.

In this order, a plurality of coordinates in the coordinate list are sequentially determined to determine whether each coordinate is a joining coordinate forming a geofence, and then the determined joining coordinates are used to generate a geofence as shown in FIG. 4F.

It should be noted that although FIG. 4A to FIG. 4F show that each coordinate in the coordinate list for forming the contour of the geofence is judged in time, in actual application, the contour of the geofence may also be formed in reverse time. Each coordinate in the coordinate list is judged.

In order to more clearly understand the inventive concept of one or more embodiments of the present specification, a block diagram of a data processing apparatus according to one or more embodiments of the present specification will be described below with reference to FIG. Those of ordinary skill in the art will appreciate that the geofence generating device of FIG. 5 only shows components related to the present exemplary embodiment, and that the geofence generating device 500 further includes components other than those shown in FIG. Common components.

FIG. 5 is a block diagram showing a geofence generating device in accordance with one or more embodiments of the present specification. As shown in FIG. 5, the geofence generating apparatus 500 includes a receiving unit 510, a determination reference coordinate unit 520, a distance judging unit 530, a first determining unit 540, and a generating unit 550.

The receiving unit 510 receives a plurality of coordinates in the coordinate list, wherein the plurality of coordinates includes the current coordinates.

The determination reference coordinate unit 520 determines the reference coordinates of the current coordinates, wherein the reference coordinates are the joined coordinates that are closest in time to the current coordinates.

The distance determining unit 530 determines whether the distance between the current coordinate and the reference coordinate is greater than or equal to the joining distance, wherein the joining distance is a metric that determines whether the current coordinate is determined to be the joining coordinate in the distance.

Alternatively, the distance judging unit 530 calculates the joining distance by the distance between the plurality of coordinates in the coordinate list and the predetermined maximum number of joining coordinates.

The first determining unit 540 determines, according to the distance determining unit, that the distance between the current coordinate and the reference coordinate is greater than or equal to the joining distance, and determines that the current coordinate is the joining coordinate forming the geofence.

The generating unit 550 generates a geofence according to the determined joining coordinates.

Optionally, the geofence generating apparatus 500 further includes a calculation screening probability unit (not shown) and a second determining unit (not shown), wherein the screening probability unit is calculated, and the screening probability is calculated, and the screening probability is in probability Determining whether the current coordinate is determined as a metric of the added coordinate; the second determining unit determines, according to the distance determining unit, that the distance between the current coordinate and the reference coordinate is less than the joining distance, and determines whether the current coordinate is the joining coordinate by the screening probability.

Optionally, the first determining unit determines whether the current coordinate is a clockwise or counterclockwise direction of the closed contour formed by the plurality of coordinates in the coordinate list after forming the coordinate of the geofence, and determining whether the next coordinate of the current coordinate is The joining coordinates of the geofence are formed.

Optionally, the device further includes: a third determining unit that determines, in response to the reference coordinate unit, that the reference coordinates are not present, and determines the current coordinates as the joining coordinates forming the geofence.

Optionally, the calculated screening probability unit calculates the screening probability by adding a predetermined desired number of coordinates, the actual number of joined coordinates, and the number of coordinates in the coordinate list.

Optionally, the second determining unit allocates a random number to the current coordinate by using a random number allocation algorithm, where the random number ranges from 0 to 1; if the random number assigned to the current coordinate is smaller than the screening probability, then the determining unit determines The current coordinate is the join coordinate.

Optionally, the distance comprises a Manhattan distance.

Therefore, it can be seen that the first determining unit, the second determining unit, and the third determining unit are both used to determine whether the current coordinate is a joining coordinate. Therefore, the determined joining coordinate may be the first determining unit, the second determining unit, or the first The third determines the joining coordinates determined by the unit.

As described above, the geofence generating apparatus according to one or more embodiments of the present specification utilizes the joining distance to filter a plurality of coordinates in the coordinate list to determine the joining coordinates forming the geofence, thereby being able to reduce the geography while retaining the shape of the area. The number of coordinates of the fence is displayed. Further, the geo-fence generation algorithm according to one or more embodiments of the present specification uses the screening probability to further filter the coordinates that cannot be added by using the joining distance on the basis of screening the coordinates by using the joining distance, so that the area can be maintained in the holding area. The complete shape enriches the details of the area.

FIG. 6 illustrates a block diagram of an electronic device that performs a geofence generation method in accordance with one or more embodiments of the present specification. Referring to Figure 6, at the hardware level, the electronic device includes a processor, an internal bus, a network interface, memory, and non-volatile memory, and of course may also include hardware required for other services. The processor reads the corresponding computer program from the non-volatile memory into the memory and then runs the web page capture device formed on the logical level. Of course, in addition to the software implementation, the present application does not exclude other implementation manners, such as a logic device or a combination of software and hardware, etc., that is, the execution body of the following processing flow is not limited to each logical unit, and may be Hardware or logic device.

One or more embodiments of the present specification also provide a computer readable storage medium storing one or more programs, the one or more programs including instructions that when included in a plurality of applications When the electronic device is executed, the electronic device can be caused to perform the method of the embodiment shown in FIG. 2.

In the 1990s, improvements to a technology could clearly distinguish between hardware improvements (eg, improvements to circuit structures such as diodes, transistors, switches, etc.) or software improvements (for process flow improvements). However, as technology advances, many of today's method flow improvements can be seen as direct improvements in hardware circuit architecture. Designers almost always get the corresponding hardware circuit structure by programming the improved method flow into the hardware circuit. Therefore, it cannot be said that the improvement of a method flow cannot be implemented by hardware entity modules. For example, a Programmable Logic Device (PLD) (such as a Field Programmable Gate Array (FPGA)) is an integrated circuit whose logic function is determined by the user programming the device. Designers can program themselves to "integrate" a digital system on a single PLD without having to ask the chip manufacturer to design and fabricate a dedicated integrated circuit chip. Moreover, today, instead of manually making integrated circuit chips, this programming is mostly implemented using "logic compiler" software, which is similar to the software compiler used in programming development, but before compiling The original code has to be written in a specific programming language. This is called the Hardware Description Language (HDL). HDL is not the only one, but there are many kinds, such as ABEL (Advanced Boolean Expression Language). AHDL (Altera Hardware Description Language), Confluence, CUPL (Cornell University Programming Language), HDCal, JHDL (Java Hardware Description Language), Lava, Lola, MyHDL, PALASM, RHDL (Ruby Hardware Description Language), etc., are currently the most commonly used VHDL (Very-High-Speed Integrated Circuit Hardware Description Language) and Verilog. It should also be apparent to those skilled in the art that the hardware flow for implementing the logic method flow can be easily obtained by simply programming the method flow into the integrated circuit with a few hardware description languages.

The controller can be implemented in any suitable manner, for example, the controller can take the form of, for example, a microprocessor or processor and a computer readable medium storing computer readable program code (eg, software or firmware) executable by the (micro)processor. In the form of logic gates, switches, application specific integrated circuits (ASICs), programmable logic controllers, and embedded microcontrollers, examples of controllers include, but are not limited to, the following microcontrollers: ARC 625D, Atmel AT91SAM, The Microchip PIC18F26K20 and the Silicone Labs C8051F320, the memory controller can also be implemented as part of the memory's control logic. Those skilled in the art will also appreciate that in addition to implementing the controller in purely computer readable program code, the controller can be logically programmed by means of logic gates, switches, ASICs, programmable logic controllers, and embedding. The form of a microcontroller or the like to achieve the same function. Such a controller can therefore be considered a hardware component, and the means for implementing various functions included therein can also be considered as a structure within the hardware component. Or even a device for implementing various functions can be considered as a software module that can be both a method of implementation and a structure within a hardware component.

The system, device, module or unit illustrated in the above embodiments may be implemented by a computer chip or an entity, or by a product having a certain function. A typical implementation device is a computer. Specifically, the computer can be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or A combination of any of these devices.

For the convenience of description, the above devices are described separately by function into various units. Of course, the functions of each unit may be implemented in the same software or software and/or hardware when implementing the present application.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include non-persistent memory, random access memory (RAM), and/or non-volatile memory in a computer readable medium, such as read only memory (ROM) or flash memory. Memory is an example of a computer readable medium.

Computer readable media includes both permanent and non-persistent, removable and non-removable media. Information storage can be implemented by any method or technology. The information can be computer readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory. (ROM), electrically erasable programmable read only memory (EEPROM), flash memory or other memory technology, compact disk read only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, Magnetic tape cartridges, magnetic tape storage or other magnetic storage devices or any other non-transportable media can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary storage of computer readable media, such as modulated data signals and carrier waves.

It is also to be understood that the terms "comprises" or "comprising" or "comprising" or any other variations are intended to encompass a non-exclusive inclusion, such that a process, method, article, Other elements not explicitly listed, or elements that are inherent to such a process, method, commodity, or equipment. An element defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or device including the element.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The application can be described in the general context of computer-executable instructions executed by a computer, such as a program module. Generally, program modules include routines, programs, objects, components, data structures, and the like that perform particular tasks or implement particular abstract data types. The present application can also be practiced in distributed computing environments where tasks are performed by remote processing devices that are connected through a communication network. In a distributed computing environment, program modules can be located in both local and remote computer storage media including storage devices.

The various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

The above description is only an embodiment of the present application and is not intended to limit the application. Various changes and modifications can be made to the present application by those skilled in the art. Any modifications, equivalents, improvements, etc. made within the spirit and scope of the present application are intended to be included within the scope of the appended claims.

Claims

A method for generating a geofence includes:

Receiving a plurality of coordinates in the coordinate list, wherein the plurality of coordinates includes a current coordinate;

Determining the reference coordinates of the current coordinates;

Determining whether the distance between the current coordinate and the reference coordinate is greater than or equal to the joining distance, wherein the joining distance is a metric that determines whether the current coordinate is determined to be a joining coordinate in the distance;

If it is greater than or equal to the joining distance, it is determined that the current coordinate is the joining coordinate forming the geofence;

A geofence is generated using the determined join coordinates.
The method of claim 1 further comprising:

Calculating a screening probability, which is a metric that determines whether the current coordinate is determined to be a joining coordinate by probability;

If the distance between the current coordinate and the reference coordinate is less than the joining distance, it is determined by the screening probability whether the current coordinate is a joining coordinate.
The method of claim 2, calculating the screening probability comprises calculating a screening probability by adding a predetermined desired number of coordinates, an actual number of joining coordinates, and a number of the plurality of coordinates in the coordinate list.
The method of claim 2, determining whether to join the current coordinates by using a screening probability comprises:

Using a random number allocation algorithm, assigning a random number to the current coordinate, wherein the random number ranges from 0 to 1;

If the random number assigned to the current coordinate is less than the screening probability, it is determined that the current coordinate is the joining coordinate.
The method of claim 1 or 2, after determining that the current coordinates are the joining coordinates of the geofence, further comprising:

Whether the next coordinate of the current coordinate is the joining coordinate forming the geofence is determined according to the clockwise direction or the counterclockwise direction of the closed contour formed by the plurality of coordinates in the coordinate list.
The method of claim 1 wherein the reference coordinates are joining coordinates that are closest in time to the current coordinates.
The method of claim 4, if it is determined that the reference coordinates are not present in the current coordinates, determining the current coordinates as the joining coordinates forming the geofence.
The method of claim 1, determining whether the distance between the current coordinate and the reference coordinate is greater than or equal to the joining distance comprises: calculating by using a distance between the plurality of coordinates in the coordinate list and a predetermined maximum number of joining coordinates distance.
The method of claim 8 wherein the distance comprises a Manhattan distance.
A geofence generating device includes:

Receiving unit, receiving a plurality of coordinates in the coordinate list, wherein the plurality of coordinates includes current coordinates;

Determining a reference coordinate unit to determine a reference coordinate of the current coordinate;

The distance determining unit determines whether the distance between the current coordinate and the reference coordinate is greater than or equal to the joining distance, wherein the joining distance is a metric that determines whether the current coordinate is determined to be a joining coordinate in the distance;

The first determining unit determines, according to the distance determining unit, that the distance between the current coordinate and the reference coordinate is greater than or equal to the joining distance, and determines that the current coordinate is the joining coordinate forming the geofence;

The generating unit generates a geofence using the determined joining coordinates.
The apparatus of claim 10, further comprising:

Calculating a screening probability unit, and calculating a screening probability, wherein the screening probability is a metric that determines whether the current coordinate is determined to be a joining coordinate by probability;

The second determining unit determines, according to the distance determining unit, that the distance between the current coordinate and the reference coordinate is less than the joining distance, and determines whether the current coordinate is the joining coordinate by using the screening probability.
The apparatus according to claim 10, wherein the first determining unit determines that the current coordinate is a clockwise or counterclockwise direction of the closed contour formed by the plurality of coordinates in the coordinate list after forming the coordinate of the geofence, Whether the next coordinate of the coordinate is the joining coordinate that forms the geofence.
The apparatus of claim 10, wherein the reference coordinates are joining coordinates that are closest in time to the current coordinates.
The apparatus according to claim 10, further comprising: a third determining unit that determines the current coordinates to be the joining coordinates forming the geofence in response to the reference coordinate unit determining that the reference coordinates are not present.
The apparatus according to claim 10, wherein the distance judging unit calculates the joining distance by the distance between the plurality of coordinates in the coordinate list and the predetermined maximum number of the joining coordinates.
The apparatus of claim 11, the calculating the screening probability unit calculates the screening probability by adding a predetermined desired number of coordinates, the actual number of joining coordinates, and the number of the plurality of coordinates in the coordinate list.
The apparatus according to claim 11, wherein the second determining unit assigns a random number to the current coordinate by using a random number allocation algorithm, wherein the random number ranges from 0 to 1; if the random number assigned to the current coordinate is smaller than To filter the probability, determine the current coordinate as the joining coordinate.
The apparatus of any of claims 10 to 17, the distance comprising a Manhattan distance.
A geofence device comprising:

Processor;

A memory arranged to store computer class execution instructions that, when executed, cause the processor to perform the following operations:

Receiving a plurality of coordinates in the coordinate list, wherein the plurality of coordinates includes a current coordinate;

Determining the reference coordinates of the current coordinates;

Determining whether the distance between the current coordinate and the reference coordinate is greater than or equal to the joining distance, wherein the joining distance is a metric that determines whether the current coordinate is determined to be a joining coordinate in the distance;

If it is greater than or equal to the joining distance, it is determined that the current coordinate is the joining coordinate forming the geofence;

A geofence is generated using the determined join coordinates.