CN116567775A - A multi-link dynamic access method and system with precise network positioning capability - Google Patents

Abstract

The invention discloses a multilink dynamic access method and system with accurate network positioning capability. The method comprises the following steps: transmitting a link access request to a wireless link access management and control device; the wireless link distributes a communication interface IP and a corresponding gateway IP for the mobile terminal; filling a default link table according to the acquired condition by the mobile terminal, calculating the shortest path, and sending an access request to the wireless link access management and control device; the wireless link access management and control device returns the planned host IP. According to the invention, the network switching of uninterrupted service is realized through the hot backup access of the heterogeneous network link, so that the service experience of mobile application can be improved; when various network links exist, the application can select a proper wireless access link according to the self requirements, so that the service safety is ensured, and the utilization efficiency of network link resources is improved; the comprehensive network positioning capability independent of the hardware capability of the mobile terminal is realized by utilizing the position information provided by various network resources, and the accuracy of the public network positioning is improved.

Description

A multi-link dynamic access method and system with precise network positioning capability

technical field

The invention relates to a multi-link dynamic access method with precise network positioning capability, and also relates to a multi-link dynamic access system with precise network positioning capability, which belongs to the technical field of network communication.

Background technique

A mobile terminal may have multiple wireless access links of different types at the same time. The bearer networks of these wireless access links include, but are not limited to: public mobile communication networks, broadband trunking communication networks, secure wireless local area networks, and the like. These bearer networks are independently operated and managed, and there is no collaboration and interaction between the provided wireless access links.

In the Chinese invention patent with the patent number ZL 202010686055.8, a system and method for multi-network access are disclosed. The technical solution uses a data bus to couple multiple baseband processor endpoints to multiple network access cards, so that each baseband processor endpoint can communicate with any network access card on the data bus. Modems and application processors operate as baseband processor endpoints. The baseband processor endpoint includes a modem and the network access card is a subscriber interface module card or a universal integrated circuit card. The bus interface can append addresses to data placed on the data bus, and can place data on the data bus according to a time division multiplexing protocol. By allowing each baseband processor endpoint to use any network access card, mobile computing devices can use different networks for different purposes.

In addition, in the Chinese invention patent with the patent number ZL 201811511049.8, a method for improving the switching performance of public and private networks is disclosed. The method comprises the following steps: according to the signal quality of the public network or the private network, selecting the public network or the private network as the current communication network of the mobile terminal; when the current communication network is switched to the public network for the first time, loading the SIM card to obtain user data; storing The obtained user data is used when the current communication network is switched to the public network again.

Contents of the invention

The primary technical problem to be solved by the present invention is to provide a multi-link dynamic access method capable of accurate network positioning.

Another technical problem to be solved by the present invention is to provide a multi-link dynamic access system capable of accurate network positioning.

For realizing above-mentioned technical purpose, the present invention adopts following technical scheme:

According to the first aspect of the embodiments of the present invention, a multi-link dynamic access method with precise network positioning capability is provided, including the following steps:

S1: The mobile terminal starts up and sends a link access request to the wireless link access control device;

S2: The wireless link access management and control device performs link access authentication, and assigns the communication interface IP and the corresponding gateway IP to the mobile terminal after the authentication is successful;

S3: The mobile terminal obtains the communication interface IP, fills in the default link table according to the obtained situation, performs the shortest path calculation, and sends an access request to the wireless link access control device through the shortest path;

When the mobile terminal is off-line, the program ends;

When the mobile terminal has at least one available link, perform the shortest path calculation, and use the shortest path to initiate a request for planning the mobile terminal host IP to the wireless link access control device;

S4: After the wireless link access control device receives the request, it replies to accept the request, and returns the planned host IP, and marks the link used in step S3 as the mobile terminal host IP-default-optimal link;

S5: start the first application;

S6: Start the second application, calculate the shortest path by the second application, and send a request to the wireless link access control device through the shortest path of the second application;

S7: The wireless link access control device accepts the request, and marks the link as the mobile terminal host IP-second application-optimal link;

S8: The wireless link access management and control device classifies the heterogeneous network location reference information;

S9: Merging multiple location reference information of the same type;

S10: Calculate the combined position reference information, and output a positioning result;

When any one of point, circle, and arc is formed, the position information of the point, the center of the circle, and the center of the arc is output as the positioning result;

When any two of points, circles, and arcs are formed, the positioning calculation is performed according to the specific situation according to the point and circle, circle and arc, point and arc, and the calculation result is output as the positioning result;

When three types of points, circles, and arcs are formed, the positioning calculation is performed according to the circles and arcs, and the calculation results are output as the positioning results;

S11: record the IP of the mobile terminal host - the location reference point involved in the calculation - the positioning result.

Wherein preferably, the step S2 includes the following sub-steps:

S21: The wireless link access management and control device plans the communication interface IP and the mobile terminal host IP;

S22: Associating identity IDs such as mobile terminal host IP, communication interface IP, international mobile equipment identification code, and communication code;

S23: Receive the access request initiated by the mobile terminal and perform access authorization, and return the authorized communication interface IP and corresponding gateway IP to the mobile terminal.

Wherein preferably, the step S3 includes the following sub-steps:

S31: create temporary host IP and virtual server IP;

S32: Fill in the default link table with the temporary host IP, communication interface IP, gateway IP and virtual server IP;

S33: use the Dijkstra algorithm to calculate the shortest path to obtain the shortest path;

S34: Use the shortest path to initiate a request for planning the IP of the mobile terminal host to the wireless link access control device;

S35: Replace the temporary host IP in the default link table with the planned mobile terminal host IP in the response.

Preferably, the temporary host IP and the virtual server IP do not conflict with other interface IPs.

Preferably, the link loss value between the communication interface IP and the gateway IP is set according to specific scenarios, the link loss value with higher priority is set to be smaller, and the loss values of other links are the same, and the link loss value is set according to the link Status notification, update the default link table in real time.

Preferably, if the second application does not time out and the link table of the second application does not change, the request is always sent according to the shortest path; if the second application times out and/or the link table of the second application changes, Then repeat steps S6-S7.

Wherein preferably, said step S9 includes the following sub-steps:

If there are multiple points, according to the accuracy, the point with the highest accuracy is preferred to participate in the calculation;

If there are multiple arcs, according to the accuracy, the arc with the highest accuracy is preferred to participate in the calculation;

If there are multiple circles, according to the precision, the circle with the highest precision is preferred to participate in the calculation.

Wherein preferably, the classification types of heterogeneous network location reference information include: point, circle, and arc.

Among them, preferably, the method of point and circle positioning calculation is:

S1011: Calculate the distance d between the point (a2, b2) and the center of the circle (a1, b1) according to the distance formula on the spherical surface of the earth;

Among them, the calculation formula is:

d=3963.0*arccos[(sin(b1)*sin(b2))+cos(b1)*cos(b2)*cos(a2–a1)]

d in kilometers = 1.609344*d

When d is less than or equal to r1, the point is in or on the circular area, and the position reference point (a2, b2) is returned as the positioning result;

When d is greater than r1, the point is outside the circular area, and enter step S1012;

Among them, r1 is the radius of the circle;

S1012: Establish a Cartesian coordinate system with (a1, b1) as the origin, and calculate θ;

The calculation formula of θ is:

Among them, the Y-axis of the Cartesian coordinate system is north-south, and the X-axis of the Cartesian coordinate system is West-East; θ is the angle between the line connecting (a1, b1) and (a2, b2) and the Y-axis; Pi is the circumference ratio;

S1013: optimize θ according to the relative positions of two reference points (a1, b1) and (a2, b2) to obtain θ ₁ , and proceed to step S1014 after optimization;

When a2-a1>0 and b2-b1>0, in the first quadrant, then θ ₁ =θ;

When a2-a1>0 and b2-b1<0, in the second quadrant, θ ₁ =180°-θ;

When a2-a1<0 and b2-b1<0, in the third quadrant, θ ₁ =θ+180°;

When a2-a1<0 and b2-b1>0, in the fourth quadrant, θ ₁ =360°-θ;

S1014: Calculate and output the positioning result;

The formula for calculating the positioning result is:

[a1+r1*sin(θ ₁ ),b1+r1*cos(θ ₁ )]

Wherein, preferably, the method of circle and arc positioning calculation is:

S1021: Calculate the distance d between the center of the circular area (a1, b1) and the center of the arc (a3, b3) according to the distance formula on the earth's surface;

Among them, the calculation formula is:

d=3963.0*arccos[(sin(b1)*sin(b3))+cos(b1)*cos(b3)*cos(a3–a1)]

d in kilometers = 1.609344*d

When d is equal to r3, the circular area is on the arc, and the output (a1, b1) is the positioning result;

When d is greater than r3 or less than r3, enter step S1022;

S1022: Establish a Cartesian coordinate system with (a3, b3) as the origin, and calculate θ;

The calculation formula of θ is:

Among them, θ is the angle between the line connecting (a1, b1) and (a3, b3) and the Y axis;

S1023: optimize θ according to the relative positions of two reference points (a1, b1) and (a3, b3) to obtain θ ₁ , and proceed to step S1024 after optimization;

When a1-a3>0 and b1-b3>0, in the first quadrant, then θ ₁ =θ;

When a1-a3>0 and b1-b3<0, in the second quadrant, θ ₁ =180°-θ;

When a1-a3<0 and b1-b3<0, in the third quadrant, θ ₁ =θ+180°;

When a1-a3<0 and b1-b3>0, in the fourth quadrant, θ ₁ =360°-θ;

S1024: Perform anti-drift optimization on θ ₁ according to the cell ID attached to the mobile terminal to obtain θ ₂ ;

When the mobile terminal is attached to the α sector, and θ ₁ is greater than 120° and less than 240°, then θ ₂ =120°;

When the mobile terminal is attached to the α sector, and θ ₁ is greater than 240° and less than 360°, then θ ₂ =0°;

When the mobile terminal is attached to the β sector, and θ ₁ is less than 120°, then θ ₂ =120°;

When the mobile terminal is attached to the β sector, and θ ₁ is greater than 240° and less than 360°, then θ ₂ =240°;

When the mobile terminal is attached to the γ sector, and θ ₁ is less than 120°, then θ ₂ =360°;

When the mobile terminal is attached to the γ sector, and θ ₁ is greater than 120° and less than 240°, then θ ₂ =240°;

S1025: According to the distance d between the center of the circular area (a1, b1) and the center of the arc (a3, b3), the corresponding calculation formula is used to calculate and output the positioning result;

When d is less than r3, the positioning result is calculated according to the following formula:

[a1+r1*sin(θ ₂ ),b1+r1*cos(θ ₂ )]

When d is greater than r3, the positioning result is calculated according to the following formula:

[a1+r1*sin(θ ₂ +180°),b1+r1*cos(θ ₂ +180°)]

Wherein preferably, the method for point and arc positioning calculation is:

S1031: Calculate the distance d between the position reference point (a2, b2) and the center of the arc (a3, b3) according to the distance formula on the earth's sphere;

Among them, the calculation formula is:

d=3963.0*arccos[(sin(b2)*sin(b3))+cos(b2)*cos(b3)*cos(a3–a2)]

d in kilometers = 1.609344*d

When d is equal to r3, the point is located on the arc, and the output (a2, b2) is the positioning result;

When d is greater than r3 or less than r3, enter step S1032;

S1032: Establish a Cartesian coordinate system with (a3, b3) as the origin, and calculate θ;

The calculation formula of θ is:

Among them, θ is the angle between the line connecting (a2, b2) and (a3, b3) and the Y axis;

S1033: Optimizing θ according to the relative positions of two reference points (a2, b2) and (a3, b3) to obtain anti-drift optimization of θ ₁ to obtain θ ₂ , and proceed to step S1034 after optimization;

When a2-a3>0 and b2-b3>0, in the first quadrant, then θ ₁ =θ;

When a2-a3>0 and b2-b3<0, in the second quadrant, θ ₁ =180°-θ;

When a2-a3<0 and b2-b3<0, in the third quadrant, θ ₁ =θ+180°;

When a2-a3<0 and b2-b3>0, in the fourth quadrant, θ ₁ =360°-θ;

S1034: Perform anti-drift optimization on θ ₁ according to the cell ID attached to the mobile terminal to obtain θ ₂ ;

When the mobile terminal is attached to the α sector, and θ ₁ is greater than 120° and less than 240°, then θ ₂ =120°;

When the mobile terminal is attached to the α sector, and θ ₁ is greater than 240° and less than 360°, then θ ₂ =0°;

When the mobile terminal is attached to the β sector, and θ ₁ is less than 120°, then θ ₂ =120°;

When the mobile terminal is attached to the β sector, and θ ₁ is greater than 240° and less than 360°, then θ ₂ =240°;

When the mobile terminal is attached to the γ sector, and θ ₁ is less than 120°, then θ ₂ =360°;

When the mobile terminal is attached to the γ sector, and θ ₁ is greater than 120° and less than 240°, then θ ₂ =240°;

S1035: Calculate and output the positioning result;

The formula for calculating the positioning result is:

[a3+r3*sin(θ ₂ ), b3+r3*cos(θ ₂ )].

According to the second aspect of the embodiments of the present invention, a multi-link dynamic access system with precise network positioning capability is provided, which includes a mobile terminal including an access management and control component and a wireless link access management and control device for implementing the above-mentioned Multi-link dynamic access method.

Compared with the prior art, the present invention realizes uninterrupted service network switching through the hot backup access of heterogeneous network links, which can improve the service experience of mobile applications; when there are multiple network links, the application can choose the appropriate link according to its own needs. The wireless access link ensures business security and improves the utilization efficiency of network link resources; the location information provided by various network resources is used to realize the comprehensive network positioning capability that does not depend on the hardware capabilities of mobile terminals, and improve the accuracy of public network network positioning.

Description of drawings

Fig. 1 is a flow chart of a multi-link dynamic access method with precise network positioning capability provided by the present invention;

FIG. 2 is a sequence diagram of a multi-link dynamic access method with precise network positioning capability provided by the present invention;

FIG. 3 is a classification diagram of reference information of heterogeneous network locations in an embodiment of the present invention;

FIG. 4 is a schematic diagram of base station cell division in an embodiment of the present invention;

Fig. 5 is a schematic diagram of point and circle positioning calculation in an embodiment of the present invention;

FIG. 6 is a schematic diagram of optimizing the relative positions of two reference points to θ in an embodiment of the present invention;

7 is a schematic diagram of circle and arc positioning calculations in an embodiment of the present invention;

Fig. 8 is a schematic diagram of point and arc positioning calculation in an embodiment of the present invention.

Detailed ways

The technical content of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

first embodiment

As shown in Figure 1 and Figure 2, a multi-link dynamic access method with precise network positioning capability provided by the first embodiment of the present invention includes the following steps:

S1: The mobile terminal (such as a smart phone, tablet computer or PC, etc.) is started, the corresponding operating system (Operating System) is started, and the wireless link access control device (such as a wireless controller (Wireless AccessPoint Controller) or equipped with a wireless device A wireless router with access control function, etc.) sends a link access request.

Wherein, the operating system includes an access control component. This is a conventional technology generally mastered by those skilled in the art, so it will not be repeated here.

S2: The wireless link access control device performs link access authentication, and assigns communication interface IPs (IP_t1-IP_tn) and corresponding gateway IPs (IP_g1-IP_gn) to the mobile terminal after successful authentication.

Among them, the authentication steps include:

S21: The wireless link access management and control device plans the communication interface IP (IP_t1-IP_tn) and the mobile terminal host IP (IP_m).

S22: Associating identity IDs such as mobile terminal host IP (IP_m), communication interface IPs (IP_t1-IP_tn), International Mobile Equipment Identity (IMEI), and communication codes.

S23: Receive the access request initiated by the mobile terminal and perform access authorization, and return the authorized communication interface IPs (IP_t1-IP_tn) and corresponding gateway IPs (IP_g1-IP_gn) to the mobile terminal.

S3: The mobile terminal acquires the communication interface IP (IP_t1-IP_tn), fills in the default link table according to the acquisition situation, performs the shortest path calculation to obtain the shortest path, and sends an access request to the wireless link access control device through the shortest path.

Please refer to the table below for how to fill in the link table:

Wherein, step S3 specifically also includes:

When the number of acquired communication interface IPs (IP_t1-IP_tn) is less than 1, that is, the mobile terminal is off-net, and the program ends.

When the number of communication interface IPs (IP_t1~IP_tn) obtained is greater than or equal to 1, that is, the mobile terminal has at least one available link, then the shortest path calculation is performed, and the wireless link access management and control device is used to initiate the planning of the mobile terminal host IP (IP_m) request.

Wherein, step S3 includes the following sub-steps:

S31: Create a temporary host IP (IP_t) and a virtual server IP (IP_s).

Wherein, the temporary host IP (IP_t) and the virtual server IP (IP_s) cannot conflict with other communication interface IPs.

S32: Fill in the temporary host IP (IP_t), communication interface IP (IP_t1-IP_tn), gateway IP (IP_g1-IP_gn) and virtual server IP (IP_s) into the default link table.

Among them, the link loss (cost) value between the communication interface IP (IP_t1~IP_tn) and the gateway IP (IP_g1~IP_gn) is set according to the specific scenario. The loss value of the link is the same, and the default link table is updated in real time according to the link status notification.

S33: Use the Dijkstra algorithm to calculate the shortest path to obtain the shortest path.

It should be noted that the embodiment of the present invention only uses the Dijkstra algorithm as an example for illustration, and the specific algorithm is determined according to an actual scene, which is not limited in the present invention.

S34: Initiate a request for planning a mobile terminal host IP (IP_m) to the wireless link access management and control device using the shortest path.

S35: Replace the temporary host IP in the default link table with the planned mobile terminal host IP (IP_m) in the response.

S4: After receiving the request, the wireless link access control device replies to accept the request, returns the planned virtual server IP (IP_s), and marks the link used in step S3 as the default optimal link.

The present invention realizes hot backup access through steps S1 to S7, that is, when the state of the preferred communication link changes, such as the connection is interrupted, the state of the communication interface of the mobile terminal changes from up to down, and the access control component is provided by the operating system The interface monitors the interface status, adjusts the corresponding link loss value to the maximum value (such as 65535), and recalculates the shortest path, and the mobile terminal service request is automatically switched to the suboptimal path.

Among them, the definition of hot backup is: when a device or a link fails, the service can be automatically switched to another device or another link.

S5: Start the first application (namely application A).

The first application has no special requirements on the access link, and directly initiates a service request through the default optimal link.

S6: Start the second application (that is, application B), and the second application calculates the shortest path, and sends a request to the wireless link access management device through the shortest path of the second application.

The second application has special requirements for link access, so it is necessary to create a link table of the second application according to the service requirements of the second application itself, and fill in the link loss value.

The link loss value between the communication interface IP (IP_t1-IP_tn) and the gateway IP (IP_g1-IP_gn) is different from the link loss value in the default link table.

The embodiment of the present invention implements load sharing between different communication links by maintaining different link tables for applications with different requirements to calculate the shortest path.

S7: The device for controlling wireless link access accepts the request, and marks the link as the optimal link for the second application.

Wherein, if the second application has not timed out and the link table of the second application has not changed, the request is always sent according to the shortest path; if the second application times out and/or the link table of the second application changes, the steps are repeated S6～S7.

There are various heterogeneous networks such as public mobile communication network, broadband trunking communication network, and WLAN between the mobile terminal and the access management and control component and the wireless link access management and control device, and the mobile terminal is connected to the Internet through the link provided by the heterogeneous network at the same time.

Because each application can connect to different types of networks, the optimal link needs to be calculated and determined according to the specific application, so that multiple applications in the same mobile terminal will be connected to different networks at the same time.

The embodiment of the present invention uses the optimal link algorithm to select the optimal link for different applications in the mobile terminal for data transmission in the case of a heterogeneous network, thereby improving the timeliness of data transmission.

S8: The wireless link access management and control device classifies the heterogeneous network location reference information.

As shown in FIG. 3 , the types of heterogeneous network location reference information classification include: point, circle, and arc.

Wherein, a point is defined as: the longitude and latitude of the mobile terminal calculated by the public mobile communication network or the broadband trunking communication network based on a base station triangulation (triangulation) algorithm.

A circle is defined as: a WLAN network, a circular range with the WLAN AP (access point) as the center and the estimated signal coverage as the radius.

Wherein, generally, the radius is less than 100 meters, and the mobile terminal may be located at any point within the circular area.

The definition of an arc is: an arc with the longitude and latitude of the base station as the center, the transmission distance from the base station to the mobile terminal as the radius, and an included angle of 120 degrees.

Among them, when the broadband cluster base station cannot provide the latitude and longitude of the mobile terminal due to its limited scale, it can provide the latitude and longitude of the base station, the ID of the cell to which the mobile terminal is attached, and the transmission delay t from the base station to the mobile terminal. The distance between the mobile terminal and the base station can be calculated by the light speed propagation formula d=t*c0 of electromagnetic waves, where c0 is the speed of light propagating in a vacuum.

As shown in Figure 4, a base station has three cells in total, denoted by α, β, and γ respectively.

S9: Merge multiple pieces of location reference information of the same type.

Wherein, the same type is defined as: the same location reference information type, that is, the same point, the same circle, or the same arc.

Among them, the method of merging is:

If there are multiple points, according to the accuracy, the point with the highest accuracy is preferred to participate in the calculation.

If there are multiple arcs, according to the accuracy, the arc with the highest accuracy is preferred to participate in the calculation.

If there are multiple circles, according to the precision, the circle with the highest precision is preferred to participate in the calculation.

If there are two location reference points, the public mobile communication network and the broadband trunking communication network, the base station deployment scale of the public mobile communication network is larger than that of the broadband trunking communication network, and the network positioning accuracy is relatively higher, and the location reference point provided by the public mobile communication network can be preferred Participate in calculations.

S10: Calculate the combined position reference information, and output a positioning result.

When any one of point, circle, and arc is formed, the position information of the point, the center of the circle, and the center of the arc is output as the positioning result.

When any two of points, circles, and arcs are formed, the positioning calculation is performed according to the specific situation according to the point and circle, circle and arc, point and arc, and the calculation result is output as the positioning result.

When three types of points, circles, and arcs are formed, positioning calculations are performed according to the circles and arcs, and the calculation results are output as positioning results.

Among them, as shown in Figure 5, the method of point and circle positioning calculation is:

S1011: Calculate the distance d between the point (a2, b2) and the center of the circle (a1, b1) according to the distance formula on the spherical surface of the earth.

Among them, the calculation formula is:

d=3963.0*arccos[(sin(b1)*sin(b2))+cos(b1)*cos(b2)*cos(a2–a1)]

d in kilometers = 1.609344*d

It should be noted that the present invention only uses the distance formula on the earth's spherical surface as an example, and the specific calculation method between two points is determined according to the actual scene, which is not limited in the present invention.

When d is less than or equal to r1, the point is in or on the circular area, and the position reference point (a2, b2) is returned as the positioning result.

When d is greater than r1, the point is outside the circular area, and go to step S1012.

Among them, r1 is the radius of the circle. For a WLAN network, r1 is the signal coverage radius of an AP (access point), which is generally an estimated value, such as 100 meters.

S1012: Establish a Cartesian coordinate system with (a1, b1) as the origin, and calculate θ.

The calculation formula of θ is:

Among them, the Y axis of the Cartesian coordinate system is north-south (up north and down south), and the X axis of the Cartesian coordinate system is West-East (left west and right east); θ is (a1, b1) and (a2, b2) The angle between the connection line and the Y axis; Pi is the pi.

S1013: optimize θ according to the relative positions of two reference points (a1, b1) and (a2, b2) to obtain θ ₁ , and proceed to step S1014 after optimization.

As shown in Figure 6, when a2-a1>0 and b2-b1>0, in the first quadrant, then θ ₁ =θ;

When a2-a1>0 and b2-b1<0, in the second quadrant, θ ₁ =180°-θ;

When a2-a1<0 and b2-b1<0, in the third quadrant, θ ₁ =θ+180°;

When a2-a1<0 and b2-b1>0, in the fourth quadrant, θ ₁ =360°-θ.

S1014: Calculate and output the positioning result.

The calculation formula is:

[a1+r1*sin(θ ₁ ),b1+r1*cos(θ ₁ )]

As shown in Figure 7, the calculation method of circle and arc positioning is as follows:

S1021: Calculate the distance d between the center of the circular area (a1, b1) and the center of the arc (a3, b3) according to the distance formula on the earth's surface.

Among them, the calculation formula is:

d=3963.0*arccos[(sin(b1)*sin(b3))+cos(b1)*cos(b3)*cos(a3–a1)]

d in kilometers = 1.609344*d

It should be noted that the present invention only uses the distance formula on the earth's spherical surface as an example, and the specific calculation method between two points is determined according to the actual scene, which is not limited by the present invention.

When d is equal to r3, the circular area is on the arc, and the output (a1, b1) is the positioning result.

When d is smaller than r3 or larger than r3, go to step S1022.

Among them, r3 is the radius of the arc. For a broadband trunking system, r3 can be calculated by multiplying the one-way transmission delay from the mobile terminal to the base station by the speed of light.

S1022: Establish a Cartesian coordinate system with (a3, b3) as the origin, and calculate θ.

The calculation formula of θ is:

Wherein, θ is the angle between the line connecting (a1, b1) and (a3, b3) and the Y axis.

S1023: According to the relative positions of the two reference points (a1, b1) and (a3, b3), optimize θ to obtain θ ₁ , and proceed to step S1024 after optimization.

As shown in Figure 6, when a1-a3>0 and b1-b3>0, in the first quadrant, then θ ₁ =θ;

When a1-a3>0 and b1-b3<0, in the second quadrant, θ ₁ =180°-θ;

When a1-a3<0 and b1-b3<0, in the third quadrant, θ ₁ =θ+180°;

When a1-a3<0 and b1-b3>0, in the fourth quadrant, θ ₁ =360°-θ.

S1024: Perform anti-drift optimization on θ ₁ according to the ID of the cell to which the mobile terminal is attached, to obtain θ ₂ .

As shown in Figure 4, when the mobile terminal is attached to the α sector, and θ ₁ is greater than 120° and less than 240°, then θ ₂ =120°.

When the mobile terminal is attached to the α sector, and θ ₁ is greater than 240° and less than 360°, then θ ₂ =0°.

When the mobile terminal is attached to the β sector, and θ ₁ is less than 120°, then θ ₂ =120°.

When the mobile terminal is attached to the β sector, and θ ₁ is greater than 240° and less than 360°, then θ ₂ =240°.

When the mobile terminal is attached to the γ sector, and θ ₁ is less than 120°, then θ ₂ =360°.

When the mobile terminal is attached to the γ sector, and θ ₁ is larger than 120° and smaller than 240°, then θ ₂ =240°.

S1025: According to the distance d between the center of the circular area (a1, b1) and the center of the arc (a3, b3), use a corresponding calculation formula to calculate and output the positioning result.

When d is less than r3, the calculation formula is:

[a1+r1*sin(θ ₂ ),b1+r1*cos(θ ₂ )]

When d is greater than r3, the calculation formula is:

As shown in Figure 8, the calculation method of point and arc positioning is as follows:

S1031: Calculate the distance d between the position reference point (a2, b2) and the arc center (a3, b3) according to the distance formula on the earth's spherical surface.

Among them, the calculation formula is:

d=3963.0*arccos[(sin(b2)*sin(b3))+cos(b2)*cos(b3)*cos(a3–a2)]

d in kilometers = 1.609344*d

It should be noted that the present invention only uses the distance formula on the earth's spherical surface as an example, and the specific calculation method between two points is determined according to the actual scene, which is not limited by the present invention.

When d is equal to r3, the point is located on the arc, and the output (a2, b2) is the positioning result.

When d is greater than r3 or less than r3, go to step S1032.

S1032: Establish a Cartesian coordinate system with (a3, b3) as the origin, and calculate θ.

The calculation formula of θ is:

Among them, the Y-axis of the Cartesian coordinate system is north-south (up north and down south), and the X-axis of the Cartesian coordinate system is West-East (left-west and right-east); θ is (a2, b2) and (a3, b3) The angle between the connection line and the Y axis; Pi is the pi.

S1033: Optimizing θ according to the relative positions of the two reference points (a2, b2) and (a3, b3) to obtain anti-drift optimization of θ ₁ to obtain θ ₂ , and proceed to step S1034 after optimization.

As shown in Figure 6, when a2-a3>0 and b2-b3>0, in the first quadrant, then θ ₁ =θ;

When a2-a3>0 and b2-b3<0, in the second quadrant, θ ₁ =180°-θ;

When a2-a3<0 and b2-b3<0, in the third quadrant, θ ₁ =θ+180°;

When a2-a3<0 and b2-b3>0, in the fourth quadrant, θ ₁ =360°-θ.

S1034: Perform anti-drift optimization on θ ₁ according to the ID of the attached cell of the mobile terminal to obtain θ ₂ .

As shown in Figure 4, when the mobile terminal is attached to the α sector, and θ ₁ is greater than 120° and less than 240°, then θ ₂ =120°.

When the mobile terminal is attached to the α sector, and θ ₁ is greater than 240° and less than 360°, then θ ₂ =0°.

When the mobile terminal is attached to the β sector, and θ ₁ is less than 120°, then θ ₂ =120°.

When the mobile terminal is attached to the β sector, and θ ₁ is greater than 240° and less than 360°, then θ ₂ =240°.

When the mobile terminal is attached to the γ sector, and θ ₁ is less than 120°, then θ ₂ =360°.

When the mobile terminal is attached to the γ sector, and θ ₁ is larger than 120° and smaller than 240°, then θ ₂ =240°.

S1035: Calculate and output the positioning result.

The calculation formula is:

[a3+r3*sin(θ ₂ ),b3+r3*cos(θ ₂ )]

Because multiple applications in the same mobile terminal will be connected to different networks at the same time, and the location reference information of different networks is different, including points, circles, and arcs. When at least two kinds of location reference information exist at the same time, the corresponding Algorithm, can accurately locate the mobile terminal network.

The embodiment of the present invention realizes the comprehensive network positioning capability independent of the mobile terminal hardware capability through the location information provided by various network resources, and improves the accuracy of public network network positioning.

S11: Correspondingly record the IP of the mobile terminal host - the position reference point participating in the calculation - the positioning result.

Through the one-to-one correspondence recording of the mobile terminal host IP-position reference point participating in the calculation-positioning results, the communication network coverage in a specific area can be known. With the continuous accumulation of data, rapid manpower deployment and deployment can be performed based on the communication network coverage. /or device scheduling.

S12: The program ends.

second embodiment

The second embodiment of the present invention provides a multi-link dynamic access system with precise network positioning capabilities, which includes a mobile terminal including an access management and control component, and a wireless link access management and control device for implementing the first embodiment of the present invention The multi-link dynamic access method described in the example.

It should be noted that the above-mentioned multiple embodiments are only examples, and the technical solutions of each embodiment can be combined, all of which are within the protection scope of the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

The multi-link dynamic access method and system with precise network positioning capability provided by the present invention have been described in detail above. For those of ordinary skill in the art, any obvious changes made to it without departing from the essence of the present invention will constitute an infringement of the patent right of the present invention and will bear corresponding legal responsibilities.

Claims (10)

1. A multi-link dynamic access method with precise network positioning capability, characterized in that it comprises the following steps: S1: The mobile terminal starts up and sends a link access request to the wireless link access control device; S2: The wireless link access management and control device performs link access authentication, and assigns the communication interface IP and the corresponding gateway IP to the mobile terminal after the authentication is successful; S3: The mobile terminal obtains the communication interface IP, fills in the default link table according to the obtained situation, performs the shortest path calculation, and sends an access request to the wireless link access control device through the shortest path; When the mobile terminal is off-line, the program ends; When the mobile terminal has at least one available link, perform the shortest path calculation, and use the shortest path to initiate a request for planning the mobile terminal host IP to the wireless link access control device; S4: After the wireless link access control device receives the request, it replies to accept the request, and returns the planned host IP, and marks the link used in step S3 as the mobile terminal host IP-default-optimal link; S5: start the first application; S6: Start the second application, calculate the shortest path by the second application, and send a request to the wireless link access control device through the shortest path of the second application; S7: The wireless link access control device accepts the request, and marks the link as the mobile terminal host IP-second application-optimal link. 2. The multi-link dynamic access method as claimed in claim 1, further comprising the steps of: S8: The wireless link access management and control device classifies the heterogeneous network location reference information; S9: Merging multiple location reference information of the same type; S10: Calculate the combined position reference information, and output a positioning result; When any one of point, circle, and arc is formed, the position information of the point, the center of the circle, and the center of the arc is output as the positioning result; When any two of points, circles, and arcs are formed, the positioning calculation is performed according to the specific situation according to the point and circle, circle and arc, point and arc, and the calculation result is output as the positioning result; When three types of points, circles, and arcs are formed, the positioning calculation is performed according to the circles and arcs, and the calculation results are output as the positioning results; S11: record the IP of the mobile terminal host - the location reference point involved in the calculation - the positioning result. 3. The multi-link dynamic access method according to claim 1, characterized in that said step S2 comprises the following sub-steps: S21: The wireless link access management and control device plans the communication interface IP and the mobile terminal host IP; S22: Associating identity IDs such as mobile terminal host IP, communication interface IP, international mobile equipment identification code, and communication code; S23: Receive the access request initiated by the mobile terminal and perform access authorization, and return the authorized communication interface IP and corresponding gateway IP to the mobile terminal. 4. The multi-link dynamic access method according to claim 1, characterized in that said step S3 comprises the following sub-steps: S31: create temporary host IP and virtual server IP; S32: Fill in the default link table with the temporary host IP, communication interface IP, gateway IP and virtual server IP; S33: Calculate the shortest path to obtain the shortest path; S34: Use the shortest path to initiate a request for planning the IP of the mobile terminal host to the wireless link access control device; S35: Replace the temporary host IP in the default link table with the planned mobile terminal host IP in the response. 5. The multi-link dynamic access method according to claim 1, characterized in that: If the second application has not timed out and the link table of the second application has not changed, the request is always sent along the shortest path; if the second application times out and/or the link table of the second application has changed, repeat steps S6～ S7. 6. The multi-link dynamic access method according to claim 1, characterized in that said step S9 comprises the following sub-steps: If there are multiple points, according to the accuracy, the point with the highest accuracy is preferred to participate in the calculation; If there are multiple arcs, according to the accuracy, the arc with the highest accuracy is preferred to participate in the calculation; If there are multiple circles, according to the precision, the circle with the highest precision is preferred to participate in the calculation. 7. The multi-link dynamic access method according to claim 2, characterized in that said step S10 comprises the following sub-steps: S1011: Calculate the distance d between the point (a2, b2) and the center of the circle (a1, b1) according to the distance formula on the spherical surface of the earth; Among them, the calculation formula is: d=3963.0*arccos[(sin(b1)*sin(b2))+cos(b1)*cos(b2)*cos(a2–a1)] dinkilometers=1.609344*d When d is less than or equal to r1, the point is in or on the circular area, and the position reference point (a2, b2) is returned as the positioning result; When d is greater than r1, the point is outside the circular area, and enter step S1012; Among them, r1 is the radius of the circle; S1012: Establish a Cartesian coordinate system with (a1, b1) as the origin, and calculate θ; The calculation formula of θ is: Among them, the Y-axis of the Cartesian coordinate system is north-south, and the X-axis of the Cartesian coordinate system is West-East; θ is the angle between the line connecting (a1, b1) and (a2, b2) and the Y-axis; Pi is the circumference ratio; S1013: optimize θ according to the relative positions of two reference points (a1, b1) and (a2, b2) to obtain θ ₁ , and proceed to step S1014 after optimization; When a2-a1>0 and b2-b1>0, in the first quadrant, then θ ₁ =θ; When a2-a1>0 and b2-b1<0, in the second quadrant, θ ₁ =180°-θ; When a2-a1<0 and b2-b1<0, in the third quadrant, θ ₁ =θ+180°; When a2-a1<0 and b2-b1>0, in the fourth quadrant, θ ₁ =360°-θ; S1014: Calculate and output the positioning result; The formula for calculating the positioning result is: [a1+r1*sin(θ ₁ ), b1+r1*cos(θ ₁ )]. 8. The multi-link dynamic access method according to claim 2, characterized in that said step S10 comprises the following sub-steps: S1021: Calculate the distance d between the center of the circular area (a1, b1) and the center of the arc (a3, b3) according to the distance formula on the earth's surface; Among them, the calculation formula is: d=3963.0*arccos[(sin(b1)*sin(b3))+cos(b1)*cos(b3)*cos(a3–a1)] dinkilometers=1.609344*d When d is equal to r3, the circular area is on the arc, and the output (a1, b1) is the positioning result; When d is greater than r3 or less than r3, enter step S1022; S1022: Establish a Cartesian coordinate system with (a3, b3) as the origin, and calculate θ; The calculation formula of θ is: Among them, θ is the angle between the line connecting (a1, b1) and (a3, b3) and the Y axis; S1023: optimize θ according to the relative positions of two reference points (a1, b1) and (a3, b3) to obtain θ ₁ , and proceed to step S1024 after optimization; When a1-a3>0 and b1-b3>0, in the first quadrant, then θ ₁ =θ; When a1-a3>0 and b1-b3<0, in the second quadrant, θ ₁ =180°-θ; When a1-a3<0 and b1-b3<0, in the third quadrant, θ ₁ =θ+180°; When a1-a3<0 and b1-b3>0, in the fourth quadrant, θ ₁ =360°-θ; S1024: Perform anti-drift optimization on θ ₁ according to the cell ID attached to the mobile terminal to obtain θ ₂ ; When the mobile terminal is attached to the α sector, and θ ₁ is greater than 120° and less than 240°, then θ ₂ =120°; When the mobile terminal is attached to the α sector, and θ ₁ is greater than 240° and less than 360°, then θ ₂ =0°; When the mobile terminal is attached to the β sector, and θ ₁ is less than 120°, then θ ₂ =120°; When the mobile terminal is attached to the β sector, and θ ₁ is greater than 240° and less than 360°, then θ ₂ =240°; When the mobile terminal is attached to the γ sector, and θ ₁ is less than 120°, then θ ₂ =360°; When the mobile terminal is attached to the γ sector, and θ ₁ is greater than 120° and less than 240°, then θ ₂ =240°; S1025: According to the distance d between the center of the circular area (a1, b1) and the center of the arc (a3, b3), the corresponding calculation formula is used to calculate and output the positioning result; When d is less than r3, the positioning result is calculated according to the following formula: [a1+r1*sin(θ ₂ ),b1+r1*cos(θ ₂ )] When d is greater than r3, the positioning result is calculated according to the following formula: 9. The multi-link dynamic access method according to claim 2, characterized in that said step S10 comprises the following sub-steps: S1031: Calculate the distance d between the position reference point (a2, b2) and the center of the arc (a3, b3) according to the distance formula on the earth's sphere; Among them, the calculation formula is: d=3963.0*arccos[(sin(b2)*sin(b3))+cos(b2)*cos(b3)*cos(a3–a2)] dinkilometers=1.609344*d When d is equal to r3, the point is located on the arc, and the output (a2, b2) is the positioning result; When d is greater than r3 or less than r3, enter step S1032; S1032: Establish a Cartesian coordinate system with (a3, b3) as the origin, and calculate θ; The calculation formula of θ is: Among them, θ is the angle between the line connecting (a2, b2) and (a3, b3) and the Y axis; S1033: Optimizing θ according to the relative positions of two reference points (a2, b2) and (a3, b3) to obtain anti-drift optimization of θ ₁ to obtain θ ₂ , and proceed to step S1034 after optimization; When a2-a3>0 and b2-b3>0, in the first quadrant, then θ ₁ =θ; When a2-a3>0 and b2-b3<0, in the second quadrant, θ ₁ =180°-θ; When a2-a3<0 and b2-b3<0, in the third quadrant, θ ₁ =θ+180°; When a2-a3<0 and b2-b3>0, in the fourth quadrant, θ ₁ =360°-θ; S1034: Perform anti-drift optimization on θ ₁ according to the cell ID attached to the mobile terminal to obtain θ ₂ ; When the mobile terminal is attached to the α sector, and θ ₁ is greater than 120° and less than 240°, then θ ₂ =120°; When the mobile terminal is attached to the α sector, and θ ₁ is greater than 240° and less than 360°, then θ ₂ =0°; When the mobile terminal is attached to the β sector, and θ ₁ is less than 120°, then θ ₂ =120°; When the mobile terminal is attached to the β sector, and θ ₁ is greater than 240° and less than 360°, then θ ₂ =240°; When the mobile terminal is attached to the γ sector, and θ ₁ is less than 120°, then θ ₂ =360°; When the mobile terminal is attached to the γ sector, and θ ₁ is greater than 120° and less than 240°, then θ ₂ =240°; S1035: Calculate and output the positioning result; The formula for calculating the positioning result is: [a3+r3*sin(θ ₂ ), b3+r3*cos(θ ₂ )]. 10. A multi-link dynamic access system with precise network positioning capability, characterized in that it includes a mobile terminal including an access management and control component, and a wireless link access management and control device, which is used to implement any one of claims 1-9. The multi-link dynamic access method described in item.